/* * Copyright © 2020 Collabora Ltd. * * SPDX-License-Identifier: LGPL-2.1-or-later * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see <http://www.gnu.org/licenses/>. */ #include "runtime.h" #include <sysexits.h> #include <gio/gio.h> /* Include these before steam-runtime-tools.h so that their backport of * G_DEFINE_AUTOPTR_CLEANUP_FUNC will be visible to it */ #include "glib-backports.h" #include "libglnx/libglnx.h" #include <steam-runtime-tools/steam-runtime-tools.h> #include "bwrap.h" #include "bwrap-lock.h" #include "elf-utils.h" #include "enumtypes.h" #include "flatpak-run-private.h" #include "resolve-in-sysroot.h" #include "tree-copy.h" #include "utils.h" /* * PvRuntime: * * Object representing a runtime to be used as the /usr for a game. */ struct _PvRuntime { GObject parent; gchar *bubblewrap; gchar *source_files; gchar *tools_dir; PvBwrapLock *runtime_lock; gchar *libcapsule_knowledge; gchar *mutable_parent; gchar *mutable_sysroot; gchar *tmpdir; gchar *overrides; const gchar *overrides_in_container; gchar *container_access; FlatpakBwrap *container_access_adverb; const gchar *runtime_files; /* either source_files or mutable_sysroot */ gchar *runtime_usr; /* either runtime_files or that + "/usr" */ gchar *runtime_files_on_host; const gchar *adverb_in_container; gchar *provider_in_current_namespace; gchar *provider_in_host_namespace; gchar *provider_in_container_namespace; const gchar *host_in_current_namespace; PvRuntimeFlags flags; int mutable_parent_fd; int mutable_sysroot_fd; gboolean any_libc_from_provider; gboolean all_libc_from_provider; gboolean runtime_is_just_usr; gboolean is_steamrt; gboolean is_scout; }; struct _PvRuntimeClass { GObjectClass parent; }; enum { PROP_0, PROP_BUBBLEWRAP, PROP_FLAGS, PROP_MUTABLE_PARENT, PROP_PROVIDER_IN_CURRENT_NAMESPACE, PROP_PROVIDER_IN_CONTAINER_NAMESPACE, PROP_SOURCE_FILES, PROP_TOOLS_DIRECTORY, N_PROPERTIES }; static GParamSpec *properties[N_PROPERTIES] = { NULL }; static void pv_runtime_initable_iface_init (GInitableIface *iface, gpointer unused); G_DEFINE_TYPE_WITH_CODE (PvRuntime, pv_runtime, G_TYPE_OBJECT, G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, pv_runtime_initable_iface_init)) /* * Return whether @path is likely to be visible in the provider mount point * (e.g. /run/host). * This needs to be kept approximately in sync with pv_bwrap_bind_usr() * and Flatpak's --filesystem=host-os special keyword. * * This doesn't currently handle /etc: we make the pessimistic assumption * that /etc/ld.so.cache, etc., are not shared. */ static gboolean path_visible_in_provider_namespace (const char *path) { while (path[0] == '/') path++; if (g_str_has_prefix (path, "usr") && (path[3] == '\0' || path[3] == '/')) return TRUE; if (g_str_has_prefix (path, "lib")) return TRUE; if (g_str_has_prefix (path, "bin") && (path[3] == '\0' || path[3] == '/')) return TRUE; if (g_str_has_prefix (path, "sbin") || (path[4] == '\0' || path[4] == '/')) return TRUE; return FALSE; } /* * Supported Debian-style multiarch tuples */ static const char * const multiarch_tuples[] = { "x86_64-linux-gnu", "i386-linux-gnu", NULL }; /* * Directories other than /usr/lib that we must search for loadable * modules, in the same order as multiarch_tuples */ static const char * const libquals[] = { "lib64", "lib32" }; G_STATIC_ASSERT (G_N_ELEMENTS (libquals) == G_N_ELEMENTS (multiarch_tuples) - 1); typedef struct { gsize multiarch_index; const char *tuple; gchar *capsule_capture_libs_basename; gchar *capsule_capture_libs; gchar *libdir_in_current_namespace; gchar *libdir_in_container; const char *libqual; gchar *ld_so; } RuntimeArchitecture; static gboolean runtime_architecture_init (RuntimeArchitecture *self, PvRuntime *runtime) { const gchar *argv[] = { NULL, "--print-ld.so", NULL }; g_return_val_if_fail (self->multiarch_index < G_N_ELEMENTS (libquals), FALSE); g_return_val_if_fail (self->multiarch_index < G_N_ELEMENTS (multiarch_tuples) - 1, FALSE); g_return_val_if_fail (self->tuple == NULL, FALSE); self->tuple = multiarch_tuples[self->multiarch_index]; g_return_val_if_fail (self->tuple != NULL, FALSE); self->libqual = libquals[self->multiarch_index]; self->capsule_capture_libs_basename = g_strdup_printf ("%s-capsule-capture-libs", self->tuple); self->capsule_capture_libs = g_build_filename (runtime->tools_dir, self->capsule_capture_libs_basename, NULL); self->libdir_in_current_namespace = g_build_filename (runtime->overrides, "lib", self->tuple, NULL); self->libdir_in_container = g_build_filename (runtime->overrides_in_container, "lib", self->tuple, NULL); /* This has the side-effect of testing whether we can run binaries * for this architecture on the current environment. We * assume that this is the same as whether we can run them * on the host, if different. */ argv[0] = self->capsule_capture_libs; self->ld_so = pv_capture_output (argv, NULL); if (self->ld_so == NULL) { g_debug ("Cannot determine ld.so for %s", self->tuple); return FALSE; } return TRUE; } static gboolean runtime_architecture_check_valid (RuntimeArchitecture *self) { g_return_val_if_fail (self->multiarch_index < G_N_ELEMENTS (libquals), FALSE); g_return_val_if_fail (self->tuple == multiarch_tuples[self->multiarch_index], FALSE); g_return_val_if_fail (self->capsule_capture_libs_basename != NULL, FALSE); g_return_val_if_fail (self->capsule_capture_libs != NULL, FALSE); g_return_val_if_fail (self->libdir_in_current_namespace != NULL, FALSE); g_return_val_if_fail (self->libdir_in_container != NULL, FALSE); g_return_val_if_fail (self->libqual == libquals[self->multiarch_index], FALSE); g_return_val_if_fail (self->ld_so != NULL, FALSE); return TRUE; } static void runtime_architecture_clear (RuntimeArchitecture *self) { self->multiarch_index = G_MAXSIZE; self->tuple = NULL; self->libqual = NULL; g_clear_pointer (&self->capsule_capture_libs_basename, g_free); g_clear_pointer (&self->capsule_capture_libs, g_free); g_clear_pointer (&self->libdir_in_current_namespace, g_free); g_clear_pointer (&self->libdir_in_container, g_free); g_clear_pointer (&self->ld_so, g_free); } G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC (RuntimeArchitecture, runtime_architecture_clear) static gboolean pv_runtime_use_provider_graphics_stack (PvRuntime *self, FlatpakBwrap *bwrap, GError **error); static void pv_runtime_set_search_paths (PvRuntime *self, FlatpakBwrap *bwrap); static void pv_runtime_init (PvRuntime *self) { self->any_libc_from_provider = FALSE; self->all_libc_from_provider = FALSE; self->mutable_parent_fd = -1; self->mutable_sysroot_fd = -1; } static void pv_runtime_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { PvRuntime *self = PV_RUNTIME (object); switch (prop_id) { case PROP_BUBBLEWRAP: g_value_set_string (value, self->bubblewrap); break; case PROP_FLAGS: g_value_set_flags (value, self->flags); break; case PROP_MUTABLE_PARENT: g_value_set_string (value, self->mutable_parent); break; case PROP_PROVIDER_IN_CURRENT_NAMESPACE: g_value_set_string (value, self->provider_in_current_namespace); break; case PROP_PROVIDER_IN_CONTAINER_NAMESPACE: g_value_set_string (value, self->provider_in_container_namespace); break; case PROP_SOURCE_FILES: g_value_set_string (value, self->source_files); break; case PROP_TOOLS_DIRECTORY: g_value_set_string (value, self->tools_dir); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static void pv_runtime_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { PvRuntime *self = PV_RUNTIME (object); const char *path; switch (prop_id) { case PROP_BUBBLEWRAP: /* Construct-only */ g_return_if_fail (self->bubblewrap == NULL); self->bubblewrap = g_value_dup_string (value); break; case PROP_FLAGS: self->flags = g_value_get_flags (value); break; case PROP_MUTABLE_PARENT: /* Construct-only */ g_return_if_fail (self->mutable_parent == NULL); path = g_value_get_string (value); if (path != NULL) { self->mutable_parent = realpath (path, NULL); if (self->mutable_parent == NULL) { /* It doesn't exist. Keep the non-canonical path so we * can warn about it later */ self->mutable_parent = g_strdup (path); } } break; case PROP_PROVIDER_IN_CURRENT_NAMESPACE: /* Construct-only */ g_return_if_fail (self->provider_in_current_namespace == NULL); self->provider_in_current_namespace = g_value_dup_string (value); break; case PROP_PROVIDER_IN_CONTAINER_NAMESPACE: /* Construct-only */ g_return_if_fail (self->provider_in_container_namespace == NULL); self->provider_in_container_namespace = g_value_dup_string (value); break; case PROP_SOURCE_FILES: /* Construct-only */ g_return_if_fail (self->source_files == NULL); path = g_value_get_string (value); if (path != NULL) { self->source_files = realpath (path, NULL); if (self->source_files == NULL) { /* It doesn't exist. Keep the non-canonical path so we * can warn about it later */ self->source_files = g_strdup (path); } } break; case PROP_TOOLS_DIRECTORY: /* Construct-only */ g_return_if_fail (self->tools_dir == NULL); self->tools_dir = g_value_dup_string (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static void pv_runtime_constructed (GObject *object) { PvRuntime *self = PV_RUNTIME (object); G_OBJECT_CLASS (pv_runtime_parent_class)->constructed (object); g_return_if_fail (self->bubblewrap != NULL); g_return_if_fail (self->provider_in_current_namespace != NULL); g_return_if_fail (self->provider_in_container_namespace != NULL); g_return_if_fail (self->source_files != NULL); g_return_if_fail (self->tools_dir != NULL); } static gboolean pv_runtime_garbage_collect (PvRuntime *self, PvBwrapLock *mutable_parent_lock, GError **error) { g_auto(GLnxDirFdIterator) iter = { FALSE }; g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE); g_return_val_if_fail (self->mutable_parent != NULL, FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); /* We don't actually *use* this: it just acts as an assertion that * we are holding the lock on the parent directory. */ g_return_val_if_fail (mutable_parent_lock != NULL, FALSE); if (!glnx_dirfd_iterator_init_at (AT_FDCWD, self->mutable_parent, TRUE, &iter, error)) return FALSE; while (TRUE) { g_autoptr(GError) local_error = NULL; g_autoptr(PvBwrapLock) temp_lock = NULL; g_autofree gchar *keep = NULL; g_autofree gchar *ref = NULL; struct dirent *dent; struct stat ignore; if (!glnx_dirfd_iterator_next_dent_ensure_dtype (&iter, &dent, NULL, error)) return FALSE; if (dent == NULL) break; switch (dent->d_type) { case DT_DIR: break; case DT_BLK: case DT_CHR: case DT_FIFO: case DT_LNK: case DT_REG: case DT_SOCK: case DT_UNKNOWN: default: g_debug ("Ignoring %s/%s: not a directory", self->mutable_parent, dent->d_name); continue; } if (!g_str_has_prefix (dent->d_name, "tmp-")) { g_debug ("Ignoring %s/%s: not tmp-*", self->mutable_parent, dent->d_name); continue; } g_debug ("Found temporary runtime %s/%s, considering whether to " "delete it...", self->mutable_parent, dent->d_name); keep = g_build_filename (dent->d_name, "keep", NULL); if (glnx_fstatat (self->mutable_parent_fd, keep, &ignore, AT_SYMLINK_NOFOLLOW, &local_error)) { g_debug ("Not deleting \"%s/%s\": ./keep exists", self->mutable_parent, dent->d_name); continue; } else if (!g_error_matches (local_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND)) { /* EACCES or something? Give it the benefit of the doubt */ g_warning ("Not deleting \"%s/%s\": unable to stat ./keep: %s", self->mutable_parent, dent->d_name, local_error->message); g_clear_error (&local_error); continue; } g_clear_error (&local_error); ref = g_build_filename (dent->d_name, ".ref", NULL); temp_lock = pv_bwrap_lock_new (self->mutable_parent_fd, ref, (PV_BWRAP_LOCK_FLAGS_CREATE | PV_BWRAP_LOCK_FLAGS_WRITE), &local_error); if (temp_lock == NULL) { g_debug ("Ignoring \"%s/%s\": unable to get lock: %s", self->mutable_parent, dent->d_name, local_error->message); g_clear_error (&local_error); continue; } g_debug ("Deleting \"%s/%s\"...", self->mutable_parent, dent->d_name); /* We have the lock, which would not have happened if someone was * still using the runtime, so we can safely delete it. */ if (!glnx_shutil_rm_rf_at (self->mutable_parent_fd, dent->d_name, NULL, &local_error)) { g_debug ("Unable to delete %s/%s: %s", self->mutable_parent, dent->d_name, local_error->message); g_clear_error (&local_error); continue; } } return TRUE; } static gboolean pv_runtime_init_mutable (PvRuntime *self, GError **error) { g_autofree gchar *dest_usr = NULL; g_autofree gchar *source_usr_subdir = NULL; g_autofree gchar *temp_dir = NULL; g_autoptr(GDir) dir = NULL; g_autoptr(PvBwrapLock) copy_lock = NULL; g_autoptr(PvBwrapLock) mutable_lock = NULL; g_autoptr(PvBwrapLock) source_lock = NULL; const char *member; const char *source_usr; glnx_autofd int temp_dir_fd = -1; gboolean is_just_usr; /* Nothing to do in this case */ if (self->mutable_parent == NULL) return TRUE; if (g_mkdir_with_parents (self->mutable_parent, 0700) != 0) return glnx_throw_errno_prefix (error, "Unable to create %s", self->mutable_parent); if (!glnx_opendirat (AT_FDCWD, self->mutable_parent, TRUE, &self->mutable_parent_fd, error)) return FALSE; /* Lock the parent directory. Anything that directly manipulates the * temporary runtimes is expected to do the same, so that * it cannot be deleting temporary runtimes at the same time we're * creating them. * * This is a read-mode lock: it's OK to create more than one temporary * runtime in parallel, as long as nothing is deleting them * concurrently. */ mutable_lock = pv_bwrap_lock_new (self->mutable_parent_fd, ".ref", PV_BWRAP_LOCK_FLAGS_CREATE, error); if (mutable_lock == NULL) return glnx_prefix_error (error, "Unable to lock \"%s/%s\"", self->mutable_parent, ".ref"); /* GC old runtimes (if they have become unused) before we create a * new one. This means we should only ever have one temporary runtime * copy per game that is run concurrently. */ if ((self->flags & PV_RUNTIME_FLAGS_GC_RUNTIMES) != 0 && !pv_runtime_garbage_collect (self, mutable_lock, error)) return FALSE; temp_dir = g_build_filename (self->mutable_parent, "tmp-XXXXXX", NULL); if (g_mkdtemp (temp_dir) == NULL) return glnx_throw_errno_prefix (error, "Cannot create temporary directory \"%s\"", temp_dir); source_usr_subdir = g_build_filename (self->source_files, "usr", NULL); dest_usr = g_build_filename (temp_dir, "usr", NULL); is_just_usr = !g_file_test (source_usr_subdir, G_FILE_TEST_IS_DIR); if (is_just_usr) { /* ${source_files}/usr does not exist, so assume it's a merged /usr, * for example ./scout/files. Copy ${source_files}/bin to * ${temp_dir}/usr/bin, etc. */ source_usr = self->source_files; if (!pv_cheap_tree_copy (self->source_files, dest_usr, PV_COPY_FLAGS_NONE, error)) return FALSE; } else { /* ${source_files}/usr exists, so assume it's a complete sysroot. * Merge ${source_files}/bin and ${source_files}/usr/bin into * ${temp_dir}/usr/bin, etc. */ source_usr = source_usr_subdir; if (!pv_cheap_tree_copy (self->source_files, temp_dir, PV_COPY_FLAGS_USRMERGE, error)) return FALSE; } if (!glnx_opendirat (-1, temp_dir, FALSE, &temp_dir_fd, error)) return FALSE; /* We need to break the hard link for the lock file, otherwise the * temporary copy will share its locked/unlocked state with the * original. */ if (TEMP_FAILURE_RETRY (unlinkat (temp_dir_fd, ".ref", 0)) != 0 && errno != ENOENT) return glnx_throw_errno_prefix (error, "Cannot remove \"%s/.ref\"", temp_dir); if (TEMP_FAILURE_RETRY (unlinkat (temp_dir_fd, "usr/.ref", 0)) != 0 && errno != ENOENT) return glnx_throw_errno_prefix (error, "Cannot remove \"%s/usr/.ref\"", temp_dir); /* Create the copy in a pre-locked state. After the lock on the parent * directory is released, the copy continues to have a read lock, * preventing it from being modified or deleted while in use (even if * a cleanup process successfully obtains a write lock on the parent). * * Because we control the structure of the runtime in this case, we * actually lock /usr/.ref instead of /.ref, and ensure that /.ref * is a symlink to it. This might become important if we pass the * runtime's /usr to Flatpak, which normally takes out a lock on * /usr/.ref (obviously this will only work if the runtime happens * to be merged-/usr). */ copy_lock = pv_bwrap_lock_new (temp_dir_fd, "usr/.ref", PV_BWRAP_LOCK_FLAGS_CREATE, error); if (copy_lock == NULL) return glnx_prefix_error (error, "Unable to lock \"%s/.ref\" in temporary runtime", dest_usr); if (is_just_usr) { if (TEMP_FAILURE_RETRY (symlinkat ("usr/.ref", temp_dir_fd, ".ref")) != 0) return glnx_throw_errno_prefix (error, "Cannot create symlink \"%s/.ref\" -> usr/.ref", temp_dir); } dir = g_dir_open (source_usr, 0, error); if (dir == NULL) return FALSE; for (member = g_dir_read_name (dir); member != NULL; member = g_dir_read_name (dir)) { /* Create symlinks ${temp_dir}/bin -> usr/bin, etc. if missing. * * Also make ${temp_dir}/etc, ${temp_dir}/var symlinks to etc * and var, for the benefit of tools like capsule-capture-libs * accessing /etc/ld.so.cache in the incomplete container (for the * final container command-line they get merged by bind_runtime() * instead). */ if (g_str_equal (member, "bin") || g_str_equal (member, "etc") || (g_str_has_prefix (member, "lib") && !g_str_equal (member, "libexec")) || g_str_equal (member, "sbin") || g_str_equal (member, "var")) { g_autofree gchar *dest = g_build_filename (temp_dir, member, NULL); g_autofree gchar *target = g_build_filename ("usr", member, NULL); if (symlink (target, dest) != 0) { /* Ignore EEXIST in the case where it was not just /usr: * it's fine if the runtime we copied from source_files * already had either directories or symlinks in its root * directory */ if (is_just_usr || errno != EEXIST) return glnx_throw_errno_prefix (error, "Cannot create symlink \"%s\" -> %s", dest, target); } } } /* Hand over from holding a lock on the source to just holding a lock * on the copy. We'll release source_lock when we leave this scope */ source_lock = g_steal_pointer (&self->runtime_lock); self->runtime_lock = g_steal_pointer (©_lock); self->mutable_sysroot = g_steal_pointer (&temp_dir); self->mutable_sysroot_fd = glnx_steal_fd (&temp_dir_fd); return TRUE; } static gboolean pv_runtime_initable_init (GInitable *initable, GCancellable *cancellable G_GNUC_UNUSED, GError **error) { PvRuntime *self = PV_RUNTIME (initable); g_autofree gchar *contents = NULL; g_autofree gchar *files_ref = NULL; g_autofree gchar *os_release = NULL; gsize len; g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); /* If we are in Flatpak container we don't expect to have a working bwrap */ if (!g_file_test ("/.flatpak-info", G_FILE_TEST_IS_REGULAR) && !g_file_test (self->bubblewrap, G_FILE_TEST_IS_EXECUTABLE)) { return glnx_throw (error, "\"%s\" is not executable", self->bubblewrap); } if (self->mutable_parent != NULL && !g_file_test (self->mutable_parent, G_FILE_TEST_IS_DIR)) { return glnx_throw (error, "\"%s\" is not a directory", self->mutable_parent); } if (!g_file_test (self->source_files, G_FILE_TEST_IS_DIR)) { return glnx_throw (error, "\"%s\" is not a directory", self->source_files); } if (!g_file_test (self->tools_dir, G_FILE_TEST_IS_DIR)) { return glnx_throw (error, "\"%s\" is not a directory", self->tools_dir); } /* Take a lock on the runtime until we're finished with setup, * to make sure it doesn't get deleted. * * If the runtime is mounted read-only in the container, it will * continue to be locked until all processes in the container exit. * If we make a temporary mutable copy, we only hold this lock until * setup has finished. */ files_ref = g_build_filename (self->source_files, ".ref", NULL); self->runtime_lock = pv_bwrap_lock_new (AT_FDCWD, files_ref, PV_BWRAP_LOCK_FLAGS_CREATE, error); /* If the runtime is being deleted, ... don't use it, I suppose? */ if (self->runtime_lock == NULL) return FALSE; if (!pv_runtime_init_mutable (self, error)) return FALSE; if (self->mutable_sysroot != NULL) { self->overrides_in_container = "/usr/lib/pressure-vessel/overrides"; self->overrides = g_build_filename (self->mutable_sysroot, self->overrides_in_container, NULL); self->runtime_files = self->mutable_sysroot; } else { /* We currently only need a temporary directory if we don't have * a mutable sysroot to work with. */ self->tmpdir = g_dir_make_tmp ("pressure-vessel-wrap.XXXXXX", error); if (self->tmpdir == NULL) return FALSE; self->overrides = g_build_filename (self->tmpdir, "overrides", NULL); self->overrides_in_container = "/overrides"; self->runtime_files = self->source_files; } self->runtime_files_on_host = pv_current_namespace_path_to_host_path (self->runtime_files); g_mkdir (self->overrides, 0700); self->runtime_usr = g_build_filename (self->runtime_files, "usr", NULL); if (g_file_test (self->runtime_usr, G_FILE_TEST_IS_DIR)) { self->runtime_is_just_usr = FALSE; } else { /* runtime_files is just a merged /usr. */ self->runtime_is_just_usr = TRUE; g_free (self->runtime_usr); self->runtime_usr = g_strdup (self->runtime_files); } self->libcapsule_knowledge = g_build_filename (self->runtime_usr, "lib", "steamrt", "libcapsule-knowledge.keyfile", NULL); if (!g_file_test (self->libcapsule_knowledge, G_FILE_TEST_EXISTS)) g_clear_pointer (&self->libcapsule_knowledge, g_free); os_release = g_build_filename (self->runtime_usr, "lib", "os-release", NULL); /* TODO: Teach SrtSystemInfo to be able to load lib/os-release from * a merged-/usr, so we don't need to open-code this here */ if (g_file_get_contents (os_release, &contents, &len, NULL)) { gsize i; g_autofree gchar *id = NULL; g_autofree gchar *version_id = NULL; char *beginning_of_line = contents; for (i = 0; i < len; i++) { if (contents[i] == '\n') { contents[i] = '\0'; if (id == NULL && g_str_has_prefix (beginning_of_line, "ID=")) id = g_shell_unquote (beginning_of_line + strlen ("ID="), NULL); else if (version_id == NULL && g_str_has_prefix (beginning_of_line, "VERSION_ID=")) version_id = g_shell_unquote (beginning_of_line + strlen ("VERSION_ID="), NULL); beginning_of_line = contents + i + 1; } } if (g_strcmp0 (id, "steamrt") == 0) { self->is_steamrt = TRUE; if (g_strcmp0 (version_id, "1") == 0) self->is_scout = TRUE; } } /* Path that, when resolved in the host namespace, points to the provider */ self->provider_in_host_namespace = pv_current_namespace_path_to_host_path (self->provider_in_current_namespace); /* If we are in a Flatpak environment we expect to have the host system * mounted in `/run/host`. Otherwise we assume that the host system, in the * current namespace, is the root. */ if (g_file_test ("/.flatpak-info", G_FILE_TEST_IS_REGULAR)) self->host_in_current_namespace = "/run/host"; else self->host_in_current_namespace = "/"; return TRUE; } void pv_runtime_cleanup (PvRuntime *self) { g_autoptr(GError) local_error = NULL; g_return_if_fail (PV_IS_RUNTIME (self)); if (self->tmpdir != NULL && !glnx_shutil_rm_rf_at (-1, self->tmpdir, NULL, &local_error)) { g_warning ("Unable to delete temporary directory: %s", local_error->message); } g_clear_pointer (&self->overrides, g_free); g_clear_pointer (&self->container_access, g_free); g_clear_pointer (&self->container_access_adverb, flatpak_bwrap_free); g_clear_pointer (&self->tmpdir, g_free); } static void pv_runtime_finalize (GObject *object) { PvRuntime *self = PV_RUNTIME (object); pv_runtime_cleanup (self); g_free (self->bubblewrap); g_free (self->libcapsule_knowledge); glnx_close_fd (&self->mutable_parent_fd); g_free (self->mutable_parent); glnx_close_fd (&self->mutable_sysroot_fd); g_free (self->mutable_sysroot); g_free (self->provider_in_current_namespace); g_free (self->provider_in_host_namespace); g_free (self->provider_in_container_namespace); g_free (self->runtime_files_on_host); g_free (self->runtime_usr); g_free (self->source_files); g_free (self->tools_dir); if (self->runtime_lock != NULL) pv_bwrap_lock_free (self->runtime_lock); G_OBJECT_CLASS (pv_runtime_parent_class)->finalize (object); } static void pv_runtime_class_init (PvRuntimeClass *cls) { GObjectClass *object_class = G_OBJECT_CLASS (cls); object_class->get_property = pv_runtime_get_property; object_class->set_property = pv_runtime_set_property; object_class->constructed = pv_runtime_constructed; object_class->finalize = pv_runtime_finalize; properties[PROP_BUBBLEWRAP] = g_param_spec_string ("bubblewrap", "Bubblewrap", "Bubblewrap executable", NULL, (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); properties[PROP_FLAGS] = g_param_spec_flags ("flags", "Flags", "Flags affecting how we set up the runtime", PV_TYPE_RUNTIME_FLAGS, PV_RUNTIME_FLAGS_NONE, (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); properties[PROP_MUTABLE_PARENT] = g_param_spec_string ("mutable-parent", "Mutable parent", ("Path to a directory in which to create a " "mutable copy of source-files, or NULL"), NULL, (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); properties[PROP_PROVIDER_IN_CURRENT_NAMESPACE] = g_param_spec_string ("provider-in-current-namespace", "Provider in current namespace", ("Path that, when resolved in the current namespace, " "points to the provider"), NULL, (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); properties[PROP_PROVIDER_IN_CONTAINER_NAMESPACE] = g_param_spec_string ("provider-in-container-namespace", "Provider in container namespace", ("Path to a directory in which the provider will be " "accessible from inside the container"), NULL, (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); properties[PROP_SOURCE_FILES] = g_param_spec_string ("source-files", "Source files", ("Path to read-only runtime files (merged-/usr " "or sysroot) in current namespace"), NULL, (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); properties[PROP_TOOLS_DIRECTORY] = g_param_spec_string ("tools-directory", "Tools directory", "Path to pressure-vessel/bin in current namespace", NULL, (G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); g_object_class_install_properties (object_class, N_PROPERTIES, properties); } PvRuntime * pv_runtime_new (const char *source_files, const char *mutable_parent, const char *bubblewrap, const char *tools_dir, const char *provider_in_current_namespace, const char *provider_in_container_namespace, PvRuntimeFlags flags, GError **error) { g_return_val_if_fail (source_files != NULL, NULL); g_return_val_if_fail (bubblewrap != NULL, NULL); g_return_val_if_fail (tools_dir != NULL, NULL); g_return_val_if_fail ((flags & ~(PV_RUNTIME_FLAGS_MASK)) == 0, NULL); return g_initable_new (PV_TYPE_RUNTIME, NULL, error, "bubblewrap", bubblewrap, "mutable-parent", mutable_parent, "source-files", source_files, "tools-directory", tools_dir, "provider-in-current-namespace", provider_in_current_namespace, "provider-in-container-namespace", provider_in_container_namespace == NULL ? "/run/host" : provider_in_container_namespace, "flags", flags, NULL); } /* If we are using a runtime, ensure the locales to be generated, * pass the lock fd to the executed process, * and make it act as a subreaper for the game itself. * * If we were using --unshare-pid then we could use bwrap --sync-fd * and rely on bubblewrap's init process for this, but we currently * can't do that without breaking gameoverlayrender.so's assumptions, * and we want -adverb for its locale functionality anyway. */ gchar * pv_runtime_get_adverb (PvRuntime *self, FlatpakBwrap *bwrap) { g_return_val_if_fail (PV_IS_RUNTIME (self), NULL); /* This will be true if pv_runtime_bind() was successfully called. */ g_return_val_if_fail (self->adverb_in_container != NULL, NULL); g_return_val_if_fail (bwrap != NULL, NULL); g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), NULL); if (self->flags & PV_RUNTIME_FLAGS_GENERATE_LOCALES) flatpak_bwrap_add_args (bwrap, "--generate-locales", NULL); if (pv_bwrap_lock_is_ofd (self->runtime_lock)) { int fd = pv_bwrap_lock_steal_fd (self->runtime_lock); g_autofree gchar *fd_str = NULL; g_debug ("Passing lock fd %d down to adverb", fd); flatpak_bwrap_add_fd (bwrap, fd); fd_str = g_strdup_printf ("%d", fd); flatpak_bwrap_add_args (bwrap, "--fd", fd_str, NULL); } else { /* * We were unable to take out an open file descriptor lock, * so it will be released on fork(). Tell the adverb process * to take out its own compatible lock instead. There will be * a short window during which we have lost our lock but the * adverb process has not taken its lock - that's unavoidable * if we want to use exec() to replace ourselves with the * container. * * pv_bwrap_bind_usr() arranges for /.ref to either be a * symbolic link to /usr/.ref which is the runtime_lock * (if opt_runtime is a merged /usr), or the runtime_lock * itself (otherwise). */ g_debug ("Telling process in container to lock /.ref"); flatpak_bwrap_add_args (bwrap, "--lock-file", "/.ref", NULL); } return g_strdup (self->adverb_in_container); } /* * Set self->container_access_adverb to a (possibly empty) command prefix * that will result in the container being available at * self->container_access, with write access to self->overrides, and * read-only access to everything else. */ static gboolean pv_runtime_provide_container_access (PvRuntime *self, GError **error) { if (self->container_access_adverb != NULL) return TRUE; if (!self->runtime_is_just_usr) { static const char * const need_top_level[] = { "bin", "etc", "lib", "sbin", }; gsize i; /* If we are working with a runtime that has a root directory containing * /etc and /usr, we can just access it via its path - that's "the same * shape" that the final system is going to be. * * In particular, if we are working with a writeable copy of a runtime * that we are editing in-place, it's always like that. */ g_debug ("%s: Setting up runtime without using bwrap", G_STRFUNC); self->container_access_adverb = flatpak_bwrap_new (NULL); self->container_access = g_strdup (self->runtime_files); /* This is going to go poorly for us if the runtime is not complete. * !self->runtime_is_just_usr means we know it has a /usr subdirectory, * but that doesn't guarantee that it has /bin, /lib, /sbin (either * in the form of real directories or symlinks into /usr) and /etc * (for at least /etc/alternatives and /etc/ld.so.cache). * * This check is not intended to be exhaustive, merely something * that will catch obvious mistakes like completely forgetting to * add the merged-/usr symlinks. * * In practice we also need /lib64 for 64-bit-capable runtimes, * but a pure 32-bit runtime would legitimately not have that, * so we don't check for it. */ for (i = 0; i < G_N_ELEMENTS (need_top_level); i++) { g_autofree gchar *path = g_build_filename (self->runtime_files, need_top_level[i], NULL); if (!g_file_test (path, G_FILE_TEST_IS_DIR)) g_warning ("%s does not exist, this probably won't work", path); } } else { /* Otherwise, will we need to use bwrap to build a directory hierarchy * that is the same shape as the final system. */ g_debug ("%s: Using bwrap to set up runtime that is just /usr", G_STRFUNC); /* By design, writeable copies of the runtime never need this: * the writeable copy is a complete sysroot, not just a merged /usr. */ g_assert (self->mutable_sysroot == NULL); g_assert (self->tmpdir != NULL); self->container_access = g_build_filename (self->tmpdir, "mnt", NULL); g_mkdir (self->container_access, 0700); self->container_access_adverb = flatpak_bwrap_new (NULL); flatpak_bwrap_add_args (self->container_access_adverb, self->bubblewrap, "--ro-bind", "/", "/", "--bind", self->overrides, self->overrides, "--tmpfs", self->container_access, NULL); if (!pv_bwrap_bind_usr (self->container_access_adverb, self->runtime_files_on_host, self->runtime_files, self->container_access, error)) return FALSE; } return TRUE; } static FlatpakBwrap * pv_runtime_get_capsule_capture_libs (PvRuntime *self, RuntimeArchitecture *arch) { FlatpakBwrap *ret = pv_bwrap_copy (self->container_access_adverb); flatpak_bwrap_add_args (ret, arch->capsule_capture_libs, "--container", self->container_access, "--link-target", self->provider_in_container_namespace, "--provider", self->provider_in_current_namespace, NULL); if (self->libcapsule_knowledge) flatpak_bwrap_add_args (ret, "--library-knowledge", self->libcapsule_knowledge, NULL); return ret; } static gboolean try_bind_dri (PvRuntime *self, RuntimeArchitecture *arch, FlatpakBwrap *bwrap, const char *libdir, GError **error) { /* e.g. /usr/lib/dri */ g_autofree gchar *dri = g_build_filename (libdir, "dri", NULL); /* e.g. /run/host/usr/lib/dri */ g_autofree gchar *dri_in_current_namespace = g_build_filename ( self->provider_in_current_namespace, dri, NULL); g_autofree gchar *s2tc = g_build_filename (libdir, "libtxc_dxtn.so", NULL); g_autofree gchar *s2tc_in_current_namespace = g_build_filename ( self->provider_in_current_namespace, s2tc, NULL); if (g_file_test (dri_in_current_namespace, G_FILE_TEST_IS_DIR)) { g_autoptr(FlatpakBwrap) temp_bwrap = NULL; g_autofree gchar *expr = NULL; g_autoptr(GDir) dir = NULL; const char *member; g_debug ("Collecting dependencies of DRI drivers in \"%s\"...", dri); expr = g_strdup_printf ("only-dependencies:if-exists:path-match:%s/dri/*.so", libdir); if (!pv_runtime_provide_container_access (self, error)) return FALSE; temp_bwrap = pv_runtime_get_capsule_capture_libs (self, arch); flatpak_bwrap_add_args (temp_bwrap, "--dest", arch->libdir_in_current_namespace, expr, NULL); flatpak_bwrap_finish (temp_bwrap); if (!pv_bwrap_run_sync (temp_bwrap, NULL, error)) return FALSE; g_clear_pointer (&temp_bwrap, flatpak_bwrap_free); dir = g_dir_open (dri_in_current_namespace, 0, error); if (dir == NULL) return FALSE; for (member = g_dir_read_name (dir); member != NULL; member = g_dir_read_name (dir)) { g_autofree gchar *target = g_build_filename (self->provider_in_container_namespace, dri, member, NULL); g_autofree gchar *dest = g_build_filename (arch->libdir_in_current_namespace, "dri", member, NULL); g_debug ("Creating symbolic link \"%s\" -> \"%s\" for \"%s\" DRI driver", dest, target, arch->tuple); /* Delete an existing symlink if any, like ln -f */ if (unlink (dest) != 0 && errno != ENOENT) return glnx_throw_errno_prefix (error, "Unable to remove \"%s\"", dest); if (symlink (target, dest) != 0) return glnx_throw_errno_prefix (error, "Unable to create symlink \"%s\" -> \"%s\"", dest, target); } } if (g_file_test (s2tc_in_current_namespace, G_FILE_TEST_EXISTS)) { g_autoptr(FlatpakBwrap) temp_bwrap = NULL; g_autofree gchar *expr = NULL; g_debug ("Collecting s2tc \"%s\" and its dependencies...", s2tc); expr = g_strdup_printf ("path-match:%s", s2tc); if (!pv_runtime_provide_container_access (self, error)) return FALSE; temp_bwrap = pv_runtime_get_capsule_capture_libs (self, arch); flatpak_bwrap_add_args (temp_bwrap, "--dest", arch->libdir_in_current_namespace, expr, NULL); flatpak_bwrap_finish (temp_bwrap); if (!pv_bwrap_run_sync (temp_bwrap, NULL, error)) return FALSE; } return TRUE; } typedef enum { ICD_KIND_NONEXISTENT, ICD_KIND_ABSOLUTE, ICD_KIND_SONAME } IcdKind; typedef struct { /* (type SrtEglIcd) or (type SrtVulkanIcd) or (type SrtVdpauDriver) * or (type SrtVaApiDriver) */ gpointer icd; gchar *resolved_library; /* Last entry is always NONEXISTENT. * For VA-API, we use [0] and ignore the other elements. * For the rest, this is keyed by the index of a multiarch tuple * in multiarch_tuples. */ IcdKind kinds[G_N_ELEMENTS (multiarch_tuples)]; /* Last entry is always NULL */ gchar *paths_in_container[G_N_ELEMENTS (multiarch_tuples)]; } IcdDetails; static IcdDetails * icd_details_new (gpointer icd) { IcdDetails *self; gsize i; g_return_val_if_fail (G_IS_OBJECT (icd), NULL); g_return_val_if_fail (SRT_IS_EGL_ICD (icd) || SRT_IS_VULKAN_ICD (icd) || SRT_IS_VDPAU_DRIVER (icd) || SRT_IS_VA_API_DRIVER (icd), NULL); self = g_slice_new0 (IcdDetails); self->icd = g_object_ref (icd); self->resolved_library = NULL; for (i = 0; i < G_N_ELEMENTS (multiarch_tuples); i++) { self->kinds[i] = ICD_KIND_NONEXISTENT; self->paths_in_container[i] = NULL; } return self; } static void icd_details_free (IcdDetails *self) { gsize i; g_object_unref (self->icd); g_free (self->resolved_library); for (i = 0; i < G_N_ELEMENTS (multiarch_tuples); i++) g_free (self->paths_in_container[i]); g_slice_free (IcdDetails, self); } G_DEFINE_AUTOPTR_CLEANUP_FUNC (IcdDetails, icd_details_free) /* * @sequence_number: numbered directory to use. Set to G_MAXSIZE to * use just @subdir without a numbered sub directory */ static gboolean bind_icd (PvRuntime *self, RuntimeArchitecture *arch, gsize sequence_number, const char *subdir, IcdDetails *details, GError **error) { static const char options[] = "if-exists:if-same-abi"; g_autofree gchar *in_current_namespace = NULL; g_autofree gchar *pattern = NULL; g_autofree gchar *dependency_pattern = NULL; g_autofree gchar *seq_str = NULL; const char *mode; g_autoptr(FlatpakBwrap) temp_bwrap = NULL; gsize multiarch_index; g_return_val_if_fail (runtime_architecture_check_valid (arch), FALSE); g_return_val_if_fail (subdir != NULL, FALSE); g_return_val_if_fail (details != NULL, FALSE); g_return_val_if_fail (details->resolved_library != NULL, FALSE); multiarch_index = arch->multiarch_index; g_return_val_if_fail (details->kinds[multiarch_index] == ICD_KIND_NONEXISTENT, FALSE); g_return_val_if_fail (details->paths_in_container[multiarch_index] == NULL, FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); if (g_path_is_absolute (details->resolved_library)) { details->kinds[multiarch_index] = ICD_KIND_ABSOLUTE; mode = "path"; /* Because the ICDs might have collisions among their * basenames (might differ only by directory), we put each * in its own numbered directory. */ if (sequence_number != G_MAXSIZE) { seq_str = g_strdup_printf ("%" G_GSIZE_FORMAT, sequence_number); in_current_namespace = g_build_filename (arch->libdir_in_current_namespace, subdir, seq_str, NULL); } else { in_current_namespace = g_build_filename (arch->libdir_in_current_namespace, subdir, NULL); } g_debug ("Ensuring %s exists", in_current_namespace); if (g_mkdir_with_parents (in_current_namespace, 0700) != 0) return glnx_throw_errno_prefix (error, "Unable to create %s", in_current_namespace); } else { /* ICDs in the default search path by definition can't collide: * one of them is the first one we find, and we use that one. */ details->kinds[multiarch_index] = ICD_KIND_SONAME; mode = "soname"; } pattern = g_strdup_printf ("no-dependencies:even-if-older:%s:%s:%s", options, mode, details->resolved_library); dependency_pattern = g_strdup_printf ("only-dependencies:%s:%s:%s", options, mode, details->resolved_library); if (!pv_runtime_provide_container_access (self, error)) return FALSE; temp_bwrap = pv_runtime_get_capsule_capture_libs (self, arch); flatpak_bwrap_add_args (temp_bwrap, "--dest", in_current_namespace == NULL ? arch->libdir_in_current_namespace : in_current_namespace, pattern, NULL); flatpak_bwrap_finish (temp_bwrap); if (!pv_bwrap_run_sync (temp_bwrap, NULL, error)) return FALSE; g_clear_pointer (&temp_bwrap, flatpak_bwrap_free); if (in_current_namespace != NULL) { /* Try to remove the directory we created. If it succeeds, then we * can optimize slightly by not capturing the dependencies: there's * no point, because we know we didn't create a symlink to the ICD * itself. (It must have been nonexistent or for a different ABI.) */ if (g_rmdir (in_current_namespace) == 0) { details->kinds[multiarch_index] = ICD_KIND_NONEXISTENT; return TRUE; } } temp_bwrap = pv_runtime_get_capsule_capture_libs (self, arch); flatpak_bwrap_add_args (temp_bwrap, "--dest", arch->libdir_in_current_namespace, dependency_pattern, NULL); flatpak_bwrap_finish (temp_bwrap); if (!pv_bwrap_run_sync (temp_bwrap, NULL, error)) return FALSE; g_clear_pointer (&temp_bwrap, flatpak_bwrap_free); if (details->kinds[multiarch_index] == ICD_KIND_ABSOLUTE) { g_assert (in_current_namespace != NULL); details->paths_in_container[multiarch_index] = g_build_filename (arch->libdir_in_container, subdir, seq_str ? seq_str : "", glnx_basename (details->resolved_library), NULL); } return TRUE; } static gboolean bind_runtime (PvRuntime *self, FlatpakBwrap *bwrap, GError **error) { static const char * const bind_mutable[] = { "etc", "var/cache", "var/lib" }; static const char * const dont_bind[] = { "/etc/group", "/etc/passwd", "/etc/host.conf", "/etc/hosts", "/etc/localtime", "/etc/machine-id", "/etc/resolv.conf", "/var/lib/dbus", "/var/lib/dhcp", "/var/lib/sudo", "/var/lib/urandom", NULL }; g_autofree gchar *xrd = g_strdup_printf ("/run/user/%ld", (long) geteuid ()); gsize i; const gchar *member; g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE); g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); if (!pv_bwrap_bind_usr (bwrap, self->runtime_files_on_host, self->runtime_files, "/", error)) return FALSE; /* In the case where we have a mutable sysroot, we mount the overrides * as part of /usr. Make /overrides a symbolic link, to be nice to * older steam-runtime-tools versions. */ if (self->mutable_sysroot != NULL) { g_assert (self->overrides_in_container[0] == '/'); g_assert (g_strcmp0 (self->overrides_in_container, "/overrides") != 0); flatpak_bwrap_add_args (bwrap, "--symlink", &self->overrides_in_container[1], "/overrides", NULL); /* Also make a matching symbolic link on disk, to make it easier * to inspect the sysroot. */ if (TEMP_FAILURE_RETRY (symlinkat (&self->overrides_in_container[1], self->mutable_sysroot_fd, "overrides")) != 0) return glnx_throw_errno_prefix (error, "Unable to create symlink \"%s/overrides\" -> \"%s\"", self->mutable_sysroot, &self->overrides_in_container[1]); } flatpak_bwrap_add_args (bwrap, "--setenv", "XDG_RUNTIME_DIR", xrd, "--tmpfs", "/tmp", "--tmpfs", "/var", "--symlink", "../run", "/var/run", NULL); if (g_strcmp0 (self->provider_in_host_namespace, "/") != 0 || g_strcmp0 (self->provider_in_container_namespace, "/run/host") != 0) { if (!pv_bwrap_bind_usr (bwrap, self->provider_in_host_namespace, self->provider_in_current_namespace, self->provider_in_container_namespace, error)) return FALSE; } for (i = 0; i < G_N_ELEMENTS (bind_mutable); i++) { g_autofree gchar *path = g_build_filename (self->runtime_files, bind_mutable[i], NULL); g_autoptr(GDir) dir = NULL; dir = g_dir_open (path, 0, NULL); if (dir == NULL) continue; for (member = g_dir_read_name (dir); member != NULL; member = g_dir_read_name (dir)) { g_autofree gchar *dest = g_build_filename ("/", bind_mutable[i], member, NULL); g_autofree gchar *full = NULL; g_autofree gchar *target = NULL; if (g_strv_contains (dont_bind, dest)) continue; full = g_build_filename (self->runtime_files, bind_mutable[i], member, NULL); target = glnx_readlinkat_malloc (-1, full, NULL, NULL); if (target != NULL) { flatpak_bwrap_add_args (bwrap, "--symlink", target, dest, NULL); } else { /* We will run bwrap in the host system, so translate the path * if necessary */ g_autofree gchar *on_host = pv_current_namespace_path_to_host_path (full); flatpak_bwrap_add_args (bwrap, "--ro-bind", on_host, dest, NULL); } } } /* If we are in a Flatpak environment, we need to test if these files are * available in the host, and not in the current environment, because we will * run bwrap in the host system */ if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/etc/machine-id", G_FILE_TEST_EXISTS)) { flatpak_bwrap_add_args (bwrap, "--ro-bind", "/etc/machine-id", "/etc/machine-id", "--symlink", "/etc/machine-id", "/var/lib/dbus/machine-id", NULL); } /* We leave this for completeness but in practice we do not expect to have * access to the "/var" host directory because Flatpak usually just binds * the host's "etc" and "usr". */ else if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/var/lib/dbus/machine-id", G_FILE_TEST_EXISTS)) { flatpak_bwrap_add_args (bwrap, "--ro-bind", "/var/lib/dbus/machine-id", "/etc/machine-id", "--symlink", "/etc/machine-id", "/var/lib/dbus/machine-id", NULL); } if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/etc/resolv.conf", G_FILE_TEST_EXISTS)) flatpak_bwrap_add_args (bwrap, "--ro-bind", "/etc/resolv.conf", "/etc/resolv.conf", NULL); if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/etc/host.conf", G_FILE_TEST_EXISTS)) flatpak_bwrap_add_args (bwrap, "--ro-bind", "/etc/host.conf", "/etc/host.conf", NULL); if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/etc/hosts", G_FILE_TEST_EXISTS)) flatpak_bwrap_add_args (bwrap, "--ro-bind", "/etc/hosts", "/etc/hosts", NULL); /* TODO: Synthesize a passwd with only the user and nobody, * like Flatpak does? */ if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/etc/passwd", G_FILE_TEST_EXISTS)) flatpak_bwrap_add_args (bwrap, "--ro-bind", "/etc/passwd", "/etc/passwd", NULL); if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/etc/group", G_FILE_TEST_EXISTS)) flatpak_bwrap_add_args (bwrap, "--ro-bind", "/etc/group", "/etc/group", NULL); if (self->flags & PV_RUNTIME_FLAGS_PROVIDER_GRAPHICS_STACK) { if (!pv_runtime_use_provider_graphics_stack (self, bwrap, error)) return FALSE; } if (self->mutable_sysroot == NULL) { /* self->overrides is in a temporary directory that will be * cleaned up before we enter the container, so we need to convert * it into a series of --dir and --symlink instructions. * * We have to do this late, because it adds data fds. */ pv_bwrap_copy_tree (bwrap, self->overrides, self->overrides_in_container); } /* /etc/localtime and /etc/resolv.conf can not exist (or be symlinks to * non-existing targets), in which case we don't want to attempt to create * bogus symlinks or bind mounts, as that will cause flatpak run to fail. */ if (pv_file_test_in_sysroot (self->host_in_current_namespace, "/etc/localtime", G_FILE_TEST_EXISTS)) { g_autofree char *target = NULL; gboolean is_reachable = FALSE; g_autofree char *tz = flatpak_get_timezone (); g_autofree char *timezone_content = g_strdup_printf ("%s\n", tz); g_autofree char *localtime_in_current_namespace = g_build_filename (self->host_in_current_namespace, "/etc/localtime", NULL); target = glnx_readlinkat_malloc (-1, localtime_in_current_namespace, NULL, NULL); if (target != NULL) { g_autoptr(GFile) base_file = NULL; g_autoptr(GFile) target_file = NULL; g_autofree char *target_canonical = NULL; base_file = g_file_new_for_path ("/etc"); target_file = g_file_resolve_relative_path (base_file, target); target_canonical = g_file_get_path (target_file); is_reachable = g_str_has_prefix (target_canonical, "/usr/"); } if (is_reachable) { flatpak_bwrap_add_args (bwrap, "--symlink", target, "/etc/localtime", NULL); } else { flatpak_bwrap_add_args (bwrap, "--ro-bind", "/etc/localtime", "/etc/localtime", NULL); } flatpak_bwrap_add_args_data (bwrap, "timezone", timezone_content, -1, "/etc/timezone", NULL); } return TRUE; } typedef enum { TAKE_FROM_PROVIDER_FLAGS_IF_DIR = (1 << 0), TAKE_FROM_PROVIDER_FLAGS_IF_EXISTS = (1 << 1), TAKE_FROM_PROVIDER_FLAGS_IF_CONTAINER_COMPATIBLE = (1 << 2), TAKE_FROM_PROVIDER_FLAGS_COPY_FALLBACK = (1 << 3), TAKE_FROM_PROVIDER_FLAGS_NONE = 0 } TakeFromProviderFlags; static gboolean pv_runtime_take_from_provider (PvRuntime *self, FlatpakBwrap *bwrap, const char *source_in_provider, const char *dest_in_container, TakeFromProviderFlags flags, GError **error) { g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE); g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); if (flags & TAKE_FROM_PROVIDER_FLAGS_IF_DIR) { if (!pv_file_test_in_sysroot (self->provider_in_current_namespace, source_in_provider, G_FILE_TEST_IS_DIR)) return TRUE; } if (flags & TAKE_FROM_PROVIDER_FLAGS_IF_EXISTS) { if (!pv_file_test_in_sysroot (self->provider_in_current_namespace, source_in_provider, G_FILE_TEST_EXISTS)) return TRUE; } if (self->mutable_sysroot != NULL) { /* Replace ${mutable_sysroot}/usr/lib/locale with a symlink to * /run/host/usr/lib/locale, or similar */ g_autofree gchar *parent_in_container = NULL; g_autofree gchar *target = NULL; const char *base; glnx_autofd int parent_dirfd = -1; parent_in_container = g_path_get_dirname (dest_in_container); parent_dirfd = pv_resolve_in_sysroot (self->mutable_sysroot_fd, parent_in_container, PV_RESOLVE_FLAGS_MKDIR_P, NULL, error); if (parent_dirfd < 0) return FALSE; base = glnx_basename (dest_in_container); if (!glnx_shutil_rm_rf_at (parent_dirfd, base, NULL, error)) return FALSE; /* If it isn't in /usr, /lib, etc., then the symlink will be * dangling and this probably isn't going to work. */ if (!path_visible_in_provider_namespace (source_in_provider)) { if (flags & TAKE_FROM_PROVIDER_FLAGS_COPY_FALLBACK) { glnx_autofd int file_fd = -1; glnx_autofd int sysroot_fd = -1; struct stat stat_buf; if (!glnx_opendirat (-1, self->provider_in_current_namespace, FALSE, &sysroot_fd, error)) return FALSE; file_fd = pv_resolve_in_sysroot (sysroot_fd, source_in_provider, PV_RESOLVE_FLAGS_READABLE, NULL, error); if (file_fd < 0) return FALSE; if (fstat (file_fd, &stat_buf) != 0) { return glnx_throw_errno_prefix (error, "An error occurred using fstat for %s", source_in_provider); } g_autofree gchar *proc_fd = g_strdup_printf ("/proc/self/fd/%d", file_fd); return glnx_file_copy_at (AT_FDCWD, proc_fd, &stat_buf, parent_dirfd, base, GLNX_FILE_COPY_OVERWRITE, NULL, error); } else { g_warning ("\"%s\" is unlikely to appear in \"%s\"", source_in_provider, self->provider_in_container_namespace); /* ... but try it anyway, it can't hurt */ } } target = g_build_filename (self->provider_in_container_namespace, source_in_provider, NULL); if (TEMP_FAILURE_RETRY (symlinkat (target, parent_dirfd, base)) != 0) return glnx_throw_errno_prefix (error, "Unable to create symlink \"%s/%s\" -> \"%s\"", self->mutable_sysroot, dest_in_container, target); } else { /* We can't edit the runtime in-place, so tell bubblewrap to mount * a new version over the top */ if (flags & TAKE_FROM_PROVIDER_FLAGS_IF_CONTAINER_COMPATIBLE) { g_autofree gchar *dest = NULL; if (g_str_has_prefix (dest_in_container, "/usr/")) dest = g_build_filename (self->runtime_usr, dest_in_container + strlen ("/usr/"), NULL); else dest = g_build_filename (self->runtime_files, dest_in_container, NULL); if (g_file_test (source_in_provider, G_FILE_TEST_IS_DIR)) { if (!g_file_test (dest, G_FILE_TEST_IS_DIR)) { g_warning ("Not mounting \"%s\" over non-directory file or " "nonexistent path \"%s\"", source_in_provider, dest); return TRUE; } } else { if (g_file_test (dest, G_FILE_TEST_IS_DIR) || !g_file_test (dest, G_FILE_TEST_EXISTS)) { g_warning ("Not mounting \"%s\" over directory or " "nonexistent path \"%s\"", source_in_provider, dest); return TRUE; } } } flatpak_bwrap_add_args (bwrap, "--ro-bind", source_in_provider, dest_in_container, NULL); } return TRUE; } static gboolean pv_runtime_remove_overridden_libraries (PvRuntime *self, RuntimeArchitecture *arch, GError **error) { static const char * const libdirs[] = { "lib", "usr/lib", "usr/lib/mesa" }; GHashTable *delete[G_N_ELEMENTS (libdirs)] = { NULL }; GLnxDirFdIterator iters[G_N_ELEMENTS (libdirs)] = { { FALSE } }; gchar *multiarch_libdirs[G_N_ELEMENTS (libdirs)] = { NULL }; gboolean ret = FALSE; gsize i; g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE); g_return_val_if_fail (arch != NULL, FALSE); g_return_val_if_fail (arch->ld_so != NULL, FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); /* Not applicable/possible if we don't have a mutable sysroot */ g_return_val_if_fail (self->mutable_sysroot != NULL, FALSE); /* We have to figure out what we want to delete before we delete anything, * because we can't tell whether a symlink points to a library of a * particular SONAME if we already deleted the library. */ for (i = 0; i < G_N_ELEMENTS (libdirs); i++) { glnx_autofd int libdir_fd = -1; struct dirent *dent; multiarch_libdirs[i] = g_build_filename (libdirs[i], arch->tuple, NULL); /* Mostly ignore error: if the library directory cannot be opened, * presumably we don't need to do anything with it... */ { g_autoptr(GError) local_error = NULL; libdir_fd = pv_resolve_in_sysroot (self->mutable_sysroot_fd, multiarch_libdirs[i], PV_RESOLVE_FLAGS_READABLE, NULL, &local_error); if (libdir_fd < 0) { g_debug ("Cannot resolve \"%s\" in \"%s\", so no need to delete " "libraries from it: %s", multiarch_libdirs[i], self->mutable_sysroot, local_error->message); g_clear_error (&local_error); continue; } } g_debug ("Removing overridden %s libraries from \"%s\" in \"%s\"...", arch->tuple, multiarch_libdirs[i], self->mutable_sysroot); if (!glnx_dirfd_iterator_init_take_fd (&libdir_fd, &iters[i], error)) { glnx_prefix_error (error, "Unable to start iterating \"%s/%s\"", self->mutable_sysroot, multiarch_libdirs[i]); goto out; } delete[i] = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); while (TRUE) { g_autoptr(Elf) elf = NULL; g_autoptr(GError) local_error = NULL; glnx_autofd int libfd = -1; g_autofree gchar *path = NULL; g_autofree gchar *soname = NULL; g_autofree gchar *target = NULL; if (!glnx_dirfd_iterator_next_dent_ensure_dtype (&iters[i], &dent, NULL, error)) return glnx_prefix_error (error, "Unable to iterate over \"%s/%s\"", self->mutable_sysroot, multiarch_libdirs[i]); if (dent == NULL) break; switch (dent->d_type) { case DT_REG: case DT_LNK: break; case DT_BLK: case DT_CHR: case DT_DIR: case DT_FIFO: case DT_SOCK: case DT_UNKNOWN: default: continue; } if (!g_str_has_prefix (dent->d_name, "lib")) continue; if (!g_str_has_suffix (dent->d_name, ".so") && strstr (dent->d_name, ".so.") == NULL) continue; path = g_build_filename (multiarch_libdirs[i], dent->d_name, NULL); /* scope for soname_link */ { g_autofree gchar *soname_link = NULL; soname_link = g_build_filename (arch->libdir_in_current_namespace, dent->d_name, NULL); /* If we found libfoo.so.1 in the container, and libfoo.so.1 * also exists among the overrides, delete it. */ if (g_file_test (soname_link, G_FILE_TEST_IS_SYMLINK)) { g_hash_table_replace (delete[i], g_strdup (dent->d_name), g_steal_pointer (&soname_link)); continue; } } target = glnx_readlinkat_malloc (iters[i].fd, dent->d_name, NULL, NULL); if (target != NULL) { g_autofree gchar *soname_link = NULL; soname_link = g_build_filename (arch->libdir_in_current_namespace, glnx_basename (target), NULL); /* If the symlink in the container points to * /foo/bar/libfoo.so.1, and libfoo.so.1 also exists among * the overrides, delete it. */ if (g_file_test (soname_link, G_FILE_TEST_IS_SYMLINK)) { g_hash_table_replace (delete[i], g_strdup (dent->d_name), g_steal_pointer (&soname_link)); continue; } } libfd = pv_resolve_in_sysroot (self->mutable_sysroot_fd, path, PV_RESOLVE_FLAGS_READABLE, NULL, &local_error); if (libfd < 0) { g_warning ("Unable to open %s/%s for reading: %s", self->mutable_sysroot, path, local_error->message); g_clear_error (&local_error); continue; } elf = pv_elf_open_fd (libfd, &local_error); if (elf != NULL) soname = pv_elf_get_soname (elf, &local_error); if (soname == NULL) { g_warning ("Unable to get SONAME of %s/%s: %s", self->mutable_sysroot, path, local_error->message); g_clear_error (&local_error); continue; } /* If we found a library with SONAME libfoo.so.1 in the * container, and libfoo.so.1 also exists among the overrides, * delete it. */ { g_autofree gchar *soname_link = NULL; soname_link = g_build_filename (arch->libdir_in_current_namespace, soname, NULL); if (g_file_test (soname_link, G_FILE_TEST_IS_SYMLINK)) { g_hash_table_replace (delete[i], g_strdup (dent->d_name), g_steal_pointer (&soname_link)); continue; } } } } for (i = 0; i < G_N_ELEMENTS (libdirs); i++) { if (delete[i] == NULL) continue; g_assert (iters[i].initialized); g_assert (iters[i].fd >= 0); GLNX_HASH_TABLE_FOREACH_KV (delete[i], const char *, name, const char *, reason) { g_autoptr(GError) local_error = NULL; g_debug ("Deleting %s/%s/%s because %s replaces it", self->mutable_sysroot, multiarch_libdirs[i], name, reason); if (!glnx_unlinkat (iters[i].fd, name, 0, &local_error)) { g_warning ("Unable to delete %s/%s/%s: %s", self->mutable_sysroot, multiarch_libdirs[i], name, local_error->message); g_clear_error (&local_error); } } } ret = TRUE; out: for (i = 0; i < G_N_ELEMENTS (libdirs); i++) { g_clear_pointer (&delete[i], g_hash_table_unref); glnx_dirfd_iterator_clear (&iters[i]); g_free (multiarch_libdirs[i]); } return ret; } static gboolean pv_runtime_take_ld_so_from_provider (PvRuntime *self, RuntimeArchitecture *arch, const gchar *ld_so_in_runtime, FlatpakBwrap *bwrap, GError **error) { glnx_autofd int path_fd = -1; glnx_autofd int provider_fd = -1; g_autofree gchar *ld_so_relative_to_provider = NULL; g_autofree gchar *ld_so_in_provider = NULL; g_debug ("Making provider's ld.so visible in container"); if (!glnx_opendirat (-1, self->provider_in_current_namespace, FALSE, &provider_fd, error)) return FALSE; path_fd = pv_resolve_in_sysroot (provider_fd, arch->ld_so, PV_RESOLVE_FLAGS_READABLE, &ld_so_relative_to_provider, error); if (path_fd < 0) return glnx_throw_errno_prefix (error, "Unable to determine provider path to %s", arch->ld_so); ld_so_in_provider = g_build_filename (self->provider_in_host_namespace, ld_so_relative_to_provider, NULL); g_debug ("Provider path: %s -> %s", arch->ld_so, ld_so_relative_to_provider); /* Might be either absolute, or relative to the root */ g_debug ("Container path: %s -> %s", arch->ld_so, ld_so_in_runtime); /* If we have a mutable sysroot, we can delete the interoperable path * and replace it with a symlink to what we want. * For example, overwrite /lib/ld-linux.so.2 with a symlink to * /run/host/lib/i386-linux-gnu/ld-2.30.so, or similar. This avoids * having to dereference a long chain of symlinks every time we run * an executable. */ if (self->mutable_sysroot != NULL && !pv_runtime_take_from_provider (self, bwrap, ld_so_in_provider, arch->ld_so, TAKE_FROM_PROVIDER_FLAGS_NONE, error)) return FALSE; /* If we don't have a mutable sysroot, we cannot replace symlinks, * and we also cannot mount onto symlinks (they get dereferenced), * so our only choice is to bind-mount * /lib/i386-linux-gnu/ld-2.30.so onto * /lib/i386-linux-gnu/ld-2.15.so and so on. * * In the mutable sysroot case, we don't strictly need to * overwrite /lib/i386-linux-gnu/ld-2.15.so with a symlink to * /run/host/lib/i386-linux-gnu/ld-2.30.so, but we might as well do * it anyway, for extra robustness: if we ever run a ld.so that * doesn't match the libc we are using (perhaps via an OS-specific, * non-standard path), that's pretty much a disaster, because it will * just crash. However, all of those (chains of) non-standard symlinks * will end up pointing to ld_so_in_runtime. */ return pv_runtime_take_from_provider (self, bwrap, ld_so_in_provider, ld_so_in_runtime, TAKE_FROM_PROVIDER_FLAGS_NONE, error); } static gchar * pv_runtime_search_in_path_and_bin (PvRuntime *self, const gchar *program_name) { const gchar * const common_bin_dirs[] = { "/usr/bin", "/bin", "/usr/sbin", "/sbin", NULL }; if (g_strcmp0 (self->host_in_current_namespace, "/") == 0) { gchar *found_path = g_find_program_in_path (program_name); if (found_path != NULL) return found_path; } for (gsize i = 0; i < G_N_ELEMENTS (common_bin_dirs) - 1; i++) { g_autofree gchar *test_path = g_build_filename (common_bin_dirs[i], program_name, NULL); if (pv_file_test_in_sysroot (self->host_in_current_namespace, test_path, G_FILE_TEST_IS_EXECUTABLE)) return g_steal_pointer (&test_path); } return NULL; } static gboolean pv_runtime_use_provider_graphics_stack (PvRuntime *self, FlatpakBwrap *bwrap, GError **error) { gsize i, j; g_autoptr(GString) dri_path = g_string_new (""); g_autoptr(GString) egl_path = g_string_new (""); g_autoptr(GString) vulkan_path = g_string_new (""); g_autoptr(GString) va_api_path = g_string_new (""); gboolean any_architecture_works = FALSE; g_autofree gchar *localedef = NULL; g_autofree gchar *ldconfig = NULL; g_autofree gchar *locale = NULL; g_autofree gchar *dir_on_host = NULL; g_autoptr(SrtSystemInfo) system_info = srt_system_info_new (NULL); g_autoptr(SrtObjectList) egl_icds = NULL; g_autoptr(SrtObjectList) vulkan_icds = NULL; g_autoptr(GPtrArray) egl_icd_details = NULL; /* (element-type IcdDetails) */ g_autoptr(GPtrArray) vulkan_icd_details = NULL; /* (element-type IcdDetails) */ g_autoptr(GPtrArray) va_api_icd_details = NULL; /* (element-type IcdDetails) */ guint n_egl_icds; guint n_vulkan_icds; const GList *icd_iter; gboolean all_libdrm_from_provider = TRUE; g_autoptr(GHashTable) libdrm_data_in_provider = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL); g_autoptr(GHashTable) gconv_in_provider = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL); g_autofree gchar *best_libdrm_data_in_provider = NULL; GHashTableIter iter; const gchar *gconv_path; g_autofree gchar *provider_in_container_namespace_guarded = NULL; if (g_str_has_suffix (self->provider_in_container_namespace, "/")) provider_in_container_namespace_guarded = g_strdup (self->provider_in_container_namespace); else provider_in_container_namespace_guarded = g_strdup_printf ("%s/", self->provider_in_container_namespace); g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE); g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); if (!pv_runtime_provide_container_access (self, error)) return FALSE; srt_system_info_set_sysroot (system_info, self->provider_in_current_namespace); g_debug ("Enumerating EGL ICDs on provider system..."); egl_icds = srt_system_info_list_egl_icds (system_info, multiarch_tuples); n_egl_icds = g_list_length (egl_icds); egl_icd_details = g_ptr_array_new_full (n_egl_icds, (GDestroyNotify) G_CALLBACK (icd_details_free)); for (icd_iter = egl_icds, j = 0; icd_iter != NULL; icd_iter = icd_iter->next, j++) { SrtEglIcd *icd = icd_iter->data; const gchar *path = srt_egl_icd_get_json_path (icd); GError *local_error = NULL; if (!srt_egl_icd_check_error (icd, &local_error)) { g_debug ("Failed to load EGL ICD #%" G_GSIZE_FORMAT " from %s: %s", j, path, local_error->message); g_clear_error (&local_error); continue; } g_debug ("EGL ICD #%" G_GSIZE_FORMAT " at %s: %s", j, path, srt_egl_icd_get_library_path (icd)); g_ptr_array_add (egl_icd_details, icd_details_new (icd)); } g_debug ("Enumerating Vulkan ICDs on provider system..."); vulkan_icds = srt_system_info_list_vulkan_icds (system_info, multiarch_tuples); n_vulkan_icds = g_list_length (vulkan_icds); vulkan_icd_details = g_ptr_array_new_full (n_vulkan_icds, (GDestroyNotify) G_CALLBACK (icd_details_free)); for (icd_iter = vulkan_icds, j = 0; icd_iter != NULL; icd_iter = icd_iter->next, j++) { SrtVulkanIcd *icd = icd_iter->data; const gchar *path = srt_vulkan_icd_get_json_path (icd); GError *local_error = NULL; if (!srt_vulkan_icd_check_error (icd, &local_error)) { g_debug ("Failed to load Vulkan ICD #%" G_GSIZE_FORMAT " from %s: %s", j, path, local_error->message); g_clear_error (&local_error); continue; } g_debug ("Vulkan ICD #%" G_GSIZE_FORMAT " at %s: %s", j, path, srt_vulkan_icd_get_library_path (icd)); g_ptr_array_add (vulkan_icd_details, icd_details_new (icd)); } /* We set this FALSE later if we decide not to use the provider libc * for some architecture. */ self->all_libc_from_provider = TRUE; g_assert (multiarch_tuples[G_N_ELEMENTS (multiarch_tuples) - 1] == NULL); for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++) { g_auto (RuntimeArchitecture) arch_on_stack = { i }; RuntimeArchitecture *arch = &arch_on_stack; g_debug ("Checking for %s libraries...", multiarch_tuples[i]); if (runtime_architecture_init (arch, self)) { g_auto(GStrv) dirs = NULL; g_autoptr(FlatpakBwrap) temp_bwrap = NULL; g_autofree gchar *this_dri_path_on_host = g_build_filename (arch->libdir_in_current_namespace, "dri", NULL); g_autofree gchar *this_dri_path_in_container = g_build_filename (arch->libdir_in_container, "dri", NULL); g_autofree gchar *libc = NULL; /* Can either be relative to the sysroot, or absolute */ g_autofree gchar *ld_so_in_runtime = NULL; g_autofree gchar *libdrm = NULL; g_autoptr(SrtObjectList) vdpau_drivers = NULL; g_autoptr(SrtObjectList) va_api_drivers = NULL; if (self->mutable_sysroot != NULL) { glnx_autofd int fd = -1; fd = pv_resolve_in_sysroot (self->mutable_sysroot_fd, arch->ld_so, PV_RESOLVE_FLAGS_NONE, &ld_so_in_runtime, error); if (fd < 0) return FALSE; } else { /* Do it the hard way, by asking a process running in the * container (or at least a container resembling the one we * are going to use) to resolve it for us */ temp_bwrap = flatpak_bwrap_new (NULL); flatpak_bwrap_add_args (temp_bwrap, self->bubblewrap, NULL); if (!pv_bwrap_bind_usr (temp_bwrap, self->runtime_files_on_host, self->runtime_files, "/", error)) return FALSE; if (!pv_bwrap_bind_usr (temp_bwrap, self->provider_in_host_namespace, self->provider_in_current_namespace, self->provider_in_container_namespace, error)) return FALSE; flatpak_bwrap_add_args (temp_bwrap, "env", "PATH=/usr/bin:/bin", "readlink", "-e", arch->ld_so, NULL); flatpak_bwrap_finish (temp_bwrap); ld_so_in_runtime = pv_capture_output ( (const char * const *) temp_bwrap->argv->pdata, NULL); g_clear_pointer (&temp_bwrap, flatpak_bwrap_free); } if (ld_so_in_runtime == NULL) { g_debug ("Container does not have %s so it cannot run " "%s binaries", arch->ld_so, arch->tuple); continue; } any_architecture_works = TRUE; g_debug ("Container path: %s -> %s", arch->ld_so, ld_so_in_runtime); pv_search_path_append (dri_path, this_dri_path_in_container); g_mkdir_with_parents (arch->libdir_in_current_namespace, 0755); g_mkdir_with_parents (this_dri_path_on_host, 0755); g_debug ("Collecting graphics drivers from provider system..."); temp_bwrap = pv_runtime_get_capsule_capture_libs (self, arch); flatpak_bwrap_add_args (temp_bwrap, "--dest", arch->libdir_in_current_namespace, /* Mesa GLX, etc. */ "gl:", /* Vulkan */ "if-exists:if-same-abi:soname:libvulkan.so.1", /* VDPAU */ "if-exists:if-same-abi:soname:libvdpau.so.1", /* VA-API */ "if-exists:if-same-abi:soname:libva.so.1", "if-exists:if-same-abi:soname:libva-drm.so.1", "if-exists:if-same-abi:soname:libva-glx.so.1", "if-exists:if-same-abi:soname:libva-x11.so.1", "if-exists:if-same-abi:soname:libva.so.2", "if-exists:if-same-abi:soname:libva-drm.so.2", "if-exists:if-same-abi:soname:libva-glx.so.2", "if-exists:if-same-abi:soname:libva-x11.so.2", /* NVIDIA proprietary stack */ "if-exists:even-if-older:soname-match:libEGL.so.*", "if-exists:even-if-older:soname-match:libEGL_nvidia.so.*", "if-exists:even-if-older:soname-match:libGL.so.*", "if-exists:even-if-older:soname-match:libGLESv1_CM.so.*", "if-exists:even-if-older:soname-match:libGLESv1_CM_nvidia.so.*", "if-exists:even-if-older:soname-match:libGLESv2.so.*", "if-exists:even-if-older:soname-match:libGLESv2_nvidia.so.*", "if-exists:even-if-older:soname-match:libGLX.so.*", "if-exists:even-if-older:soname-match:libGLX_nvidia.so.*", "if-exists:even-if-older:soname-match:libGLX_indirect.so.*", "if-exists:even-if-older:soname-match:libGLdispatch.so.*", "if-exists:even-if-older:soname-match:libOpenGL.so.*", "if-exists:even-if-older:soname-match:libcuda.so.*", "if-exists:even-if-older:soname-match:libglx.so.*", "if-exists:even-if-older:soname-match:libnvidia-cbl.so.*", "if-exists:even-if-older:soname-match:libnvidia-cfg.so.*", "if-exists:even-if-older:soname-match:libnvidia-compiler.so.*", "if-exists:even-if-older:soname-match:libnvidia-egl-wayland.so.*", "if-exists:even-if-older:soname-match:libnvidia-eglcore.so.*", "if-exists:even-if-older:soname-match:libnvidia-encode.so.*", "if-exists:even-if-older:soname-match:libnvidia-fatbinaryloader.so.*", "if-exists:even-if-older:soname-match:libnvidia-fbc.so.*", "if-exists:even-if-older:soname-match:libnvidia-glcore.so.*", "if-exists:even-if-older:soname-match:libnvidia-glsi.so.*", "if-exists:even-if-older:soname-match:libnvidia-glvkspirv.so.*", "if-exists:even-if-older:soname-match:libnvidia-ifr.so.*", "if-exists:even-if-older:soname-match:libnvidia-ml.so.*", "if-exists:even-if-older:soname-match:libnvidia-opencl.so.*", "if-exists:even-if-older:soname-match:libnvidia-opticalflow.so.*", "if-exists:even-if-older:soname-match:libnvidia-ptxjitcompiler.so.*", "if-exists:even-if-older:soname-match:libnvidia-rtcore.so.*", "if-exists:even-if-older:soname-match:libnvidia-tls.so.*", "if-exists:even-if-older:soname-match:libOpenCL.so.*", "if-exists:even-if-older:soname-match:libvdpau_nvidia.so.*", NULL); flatpak_bwrap_finish (temp_bwrap); if (!pv_bwrap_run_sync (temp_bwrap, NULL, error)) return FALSE; g_clear_pointer (&temp_bwrap, flatpak_bwrap_free); g_debug ("Collecting %s EGL drivers from host system...", arch->tuple); for (j = 0; j < egl_icd_details->len; j++) { IcdDetails *details = g_ptr_array_index (egl_icd_details, j); SrtEglIcd *icd = SRT_EGL_ICD (details->icd); if (!srt_egl_icd_check_error (icd, NULL)) continue; details->resolved_library = srt_egl_icd_resolve_library_path (icd); g_assert (details->resolved_library != NULL); if (!bind_icd (self, arch, j, "glvnd", details, error)) return FALSE; } g_debug ("Collecting %s Vulkan drivers from host system...", arch->tuple); for (j = 0; j < vulkan_icd_details->len; j++) { IcdDetails *details = g_ptr_array_index (vulkan_icd_details, j); SrtVulkanIcd *icd = SRT_VULKAN_ICD (details->icd); if (!srt_vulkan_icd_check_error (icd, NULL)) continue; details->resolved_library = srt_vulkan_icd_resolve_library_path (icd); g_assert (details->resolved_library != NULL); if (!bind_icd (self, arch, j, "vulkan", details, error)) return FALSE; } g_debug ("Enumerating %s VDPAU ICDs on host system...", arch->tuple); vdpau_drivers = srt_system_info_list_vdpau_drivers (system_info, arch->tuple, SRT_DRIVER_FLAGS_NONE); for (icd_iter = vdpau_drivers; icd_iter != NULL; icd_iter = icd_iter->next) { g_autoptr(IcdDetails) details = icd_details_new (icd_iter->data); details->resolved_library = srt_vdpau_driver_resolve_library_path (details->icd); g_assert (details->resolved_library != NULL); g_assert (g_path_is_absolute (details->resolved_library)); /* We avoid using the sequence number for VDPAU because they can only * be located in a single directory, so by definition we can't have * collisions */ if (!bind_icd (self, arch, G_MAXSIZE, "vdpau", details, error)) return FALSE; } g_debug ("Enumerating %s VA-API drivers on host system...", arch->tuple); va_api_drivers = srt_system_info_list_va_api_drivers (system_info, arch->tuple, SRT_DRIVER_FLAGS_NONE); /* Guess that there will be about the same number of VA-API ICDs * for each word size. This only needs to be approximately right: * g_ptr_array_add() will resize the allocated buffer if needed. */ if (va_api_icd_details == NULL) va_api_icd_details = g_ptr_array_new_full (g_list_length (va_api_drivers) * (G_N_ELEMENTS (multiarch_tuples) - 1), (GDestroyNotify) G_CALLBACK (icd_details_free)); for (icd_iter = va_api_drivers, j = 0; icd_iter != NULL; icd_iter = icd_iter->next, j++) { g_autoptr(IcdDetails) details = icd_details_new (icd_iter->data); details->resolved_library = srt_va_api_driver_resolve_library_path (details->icd); g_assert (details->resolved_library != NULL); g_assert (g_path_is_absolute (details->resolved_library)); if (!bind_icd (self, arch, j, "dri", details, error)) return FALSE; g_ptr_array_add (va_api_icd_details, g_steal_pointer (&details)); } if (self->mutable_sysroot != NULL && !pv_runtime_remove_overridden_libraries (self, arch, error)) return FALSE; libc = g_build_filename (arch->libdir_in_current_namespace, "libc.so.6", NULL); /* If we are going to use the provider's libc6 (likely) * then we have to use its ld.so too. */ if (g_file_test (libc, G_FILE_TEST_IS_SYMLINK)) { g_autofree char *libc_target = NULL; if (!pv_runtime_take_ld_so_from_provider (self, arch, ld_so_in_runtime, bwrap, error)) return FALSE; /* Collect miscellaneous libraries that libc might dlopen. */ g_assert (temp_bwrap == NULL); temp_bwrap = pv_runtime_get_capsule_capture_libs (self, arch); flatpak_bwrap_add_args (temp_bwrap, "--dest", arch->libdir_in_current_namespace, "if-exists:libidn2.so.0", "if-exists:even-if-older:soname-match:libnss_compat.so.*", "if-exists:even-if-older:soname-match:libnss_db.so.*", "if-exists:even-if-older:soname-match:libnss_dns.so.*", "if-exists:even-if-older:soname-match:libnss_files.so.*", NULL); flatpak_bwrap_finish (temp_bwrap); if (!pv_bwrap_run_sync (temp_bwrap, NULL, error)) return FALSE; g_clear_pointer (&temp_bwrap, flatpak_bwrap_free); libc_target = glnx_readlinkat_malloc (-1, libc, NULL, NULL); if (libc_target != NULL) { g_autofree gchar *dir = NULL; g_autofree gchar *gconv_dir_in_provider = NULL; gboolean found = FALSE; dir = g_path_get_dirname (libc_target); if (g_str_has_prefix (dir, provider_in_container_namespace_guarded)) memmove (dir, dir + strlen (self->provider_in_container_namespace), strlen (dir) - strlen (self->provider_in_container_namespace) + 1); /* We are assuming that in the glibc "Makeconfig", $(libdir) was the same as * $(slibdir) (this is the upstream default) or the same as "/usr$(slibdir)" * (like in Debian without the mergerd /usr). We also assume that $(gconvdir) * had its default value "$(libdir)/gconv". * We check /usr first because otherwise, if the host is merged-/usr and the * container is not, we might end up binding /lib instead of /usr/lib * and that could cause issues. */ if (g_str_has_prefix (dir, "/usr/")) memmove (dir, dir + strlen ("/usr"), strlen (dir) - strlen ("/usr") + 1); gconv_dir_in_provider = g_build_filename ("/usr", dir, "gconv", NULL); if (pv_file_test_in_sysroot (self->provider_in_current_namespace, gconv_dir_in_provider, G_FILE_TEST_IS_DIR)) { g_hash_table_add (gconv_in_provider, g_steal_pointer (&gconv_dir_in_provider)); found = TRUE; } if (!found) { /* Try again without hwcaps subdirectories. * For example, libc6-i386 on SteamOS 2 'brewmaster' * contains /lib/i386-linux-gnu/i686/cmov/libc.so.6, * for which we want gconv modules from * /usr/lib/i386-linux-gnu/gconv, not from * /usr/lib/i386-linux-gnu/i686/cmov/gconv. */ while (g_str_has_suffix (dir, "/cmov") || g_str_has_suffix (dir, "/i686") || g_str_has_suffix (dir, "/sse2") || g_str_has_suffix (dir, "/tls") || g_str_has_suffix (dir, "/x86_64")) { char *slash = strrchr (dir, '/'); g_assert (slash != NULL); *slash = '\0'; } g_clear_pointer (&gconv_dir_in_provider, g_free); gconv_dir_in_provider = g_build_filename ("/usr", dir, "gconv", NULL); if (pv_file_test_in_sysroot (self->provider_in_current_namespace, gconv_dir_in_provider, G_FILE_TEST_IS_DIR)) { g_hash_table_add (gconv_in_provider, g_steal_pointer (&gconv_dir_in_provider)); found = TRUE; } } if (!found) { g_debug ("We were expecting to have the gconv modules directory in the " "provider to be located in \"%s/gconv\", but instead it is missing", dir); } } self->any_libc_from_provider = TRUE; } else { self->all_libc_from_provider = FALSE; } libdrm = g_build_filename (arch->libdir_in_current_namespace, "libdrm.so.2", NULL); /* If we have libdrm.so.2 in overrides we also want to mount * ${prefix}/share/libdrm from the host. ${prefix} is derived from * the absolute path of libdrm.so.2 */ if (g_file_test (libdrm, G_FILE_TEST_IS_SYMLINK)) { g_autofree char *target = NULL; target = glnx_readlinkat_malloc (-1, libdrm, NULL, NULL); if (target != NULL) { g_autofree gchar *dir = NULL; g_autofree gchar *lib_multiarch = NULL; g_autofree gchar *libdrm_dir_in_provider = NULL; dir = g_path_get_dirname (target); lib_multiarch = g_build_filename ("/lib", arch->tuple, NULL); if (g_str_has_suffix (dir, lib_multiarch)) dir[strlen (dir) - strlen (lib_multiarch)] = '\0'; else if (g_str_has_suffix (dir, "/lib64")) dir[strlen (dir) - strlen ("/lib64")] = '\0'; else if (g_str_has_suffix (dir, "/lib32")) dir[strlen (dir) - strlen ("/lib32")] = '\0'; else if (g_str_has_suffix (dir, "/lib")) dir[strlen (dir) - strlen ("/lib")] = '\0'; if (g_str_has_prefix (dir, provider_in_container_namespace_guarded)) memmove (dir, dir + strlen (self->provider_in_container_namespace), strlen (dir) - strlen (self->provider_in_container_namespace) + 1); libdrm_dir_in_provider = g_build_filename (dir, "share", "libdrm", NULL); if (pv_file_test_in_sysroot (self->provider_in_current_namespace, libdrm_dir_in_provider, G_FILE_TEST_IS_DIR)) { g_hash_table_add (libdrm_data_in_provider, g_steal_pointer (&libdrm_dir_in_provider)); } else { g_debug ("We were expecting to have the libdrm directory " "in the provider to be located in " "\"%s/share/libdrm\", but instead it is missing", dir); } } } else { /* For at least a single architecture, libdrm is newer in the container */ all_libdrm_from_provider = FALSE; } /* Order matters: drivers from a later entry will overwrite * drivers from an earlier entry. Because we don't know whether * /lib and /usr/lib are 32- or 64-bit, we need to prioritize * libQUAL higher. Prioritize Debian-style multiarch higher * still, because it's completely unambiguous. */ dirs = g_new0 (gchar *, 7); dirs[0] = g_strdup ("/lib"); dirs[1] = g_strdup ("/usr/lib"); dirs[2] = g_build_filename ("/", arch->libqual, NULL); dirs[3] = g_build_filename ("/usr", arch->libqual, NULL); dirs[4] = g_build_filename ("/lib", arch->tuple, NULL); dirs[5] = g_build_filename ("/usr", "lib", arch->tuple, NULL); for (j = 0; j < 6; j++) { if (!try_bind_dri (self, arch, bwrap, dirs[j], error)) return FALSE; } } } if (!any_architecture_works) { GString *archs = g_string_new (""); g_assert (multiarch_tuples[G_N_ELEMENTS (multiarch_tuples) - 1] == NULL); for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++) { if (archs->len > 0) g_string_append (archs, ", "); g_string_append (archs, multiarch_tuples[i]); } g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, "None of the supported CPU architectures are common to " "the host system and the container (tried: %s)", archs->str); g_string_free (archs, TRUE); return FALSE; } if (self->any_libc_from_provider && !self->all_libc_from_provider) { /* * This shouldn't happen. It would mean that there exist at least * two architectures (let's say aaa and bbb) for which we have: * provider libc6:aaa < container libc6 < provider libc6:bbb * (we know that the container's libc6:aaa and libc6:bbb are * constrained to be the same version because that's how multiarch * works). * * If the provider system locales work OK with both the aaa and bbb * versions, let's assume they will also work with the intermediate * version from the container... */ g_warning ("Using glibc from provider system for some but not all " "architectures! Arbitrarily using provider locales."); } if (self->any_libc_from_provider) { g_debug ("Making provider locale data visible in container"); if (!pv_runtime_take_from_provider (self, bwrap, "/usr/lib/locale", "/usr/lib/locale", TAKE_FROM_PROVIDER_FLAGS_IF_EXISTS, error)) return FALSE; if (!pv_runtime_take_from_provider (self, bwrap, "/usr/share/i18n", "/usr/share/i18n", TAKE_FROM_PROVIDER_FLAGS_IF_EXISTS, error)) return FALSE; localedef = pv_runtime_search_in_path_and_bin (self, "localedef"); if (localedef == NULL) { g_warning ("Cannot find localedef"); } else if (!pv_runtime_take_from_provider (self, bwrap, localedef, "/usr/bin/localedef", TAKE_FROM_PROVIDER_FLAGS_IF_CONTAINER_COMPATIBLE, error)) { return FALSE; } locale = pv_runtime_search_in_path_and_bin (self, "locale"); if (locale == NULL) { g_warning ("Cannot find locale"); } else if (!pv_runtime_take_from_provider (self, bwrap, locale, "/usr/bin/locale", TAKE_FROM_PROVIDER_FLAGS_IF_CONTAINER_COMPATIBLE, error)) { return FALSE; } ldconfig = pv_runtime_search_in_path_and_bin (self, "ldconfig"); if (ldconfig == NULL) { g_warning ("Cannot find ldconfig"); } else if (!pv_runtime_take_from_provider (self, bwrap, ldconfig, "/sbin/ldconfig", TAKE_FROM_PROVIDER_FLAGS_NONE, error)) { return FALSE; } g_debug ("Making provider gconv modules visible in container"); g_hash_table_iter_init (&iter, gconv_in_provider); while (g_hash_table_iter_next (&iter, (gpointer *)&gconv_path, NULL)) { if (!pv_runtime_take_from_provider (self, bwrap, gconv_path, gconv_path, TAKE_FROM_PROVIDER_FLAGS_IF_DIR, error)) return FALSE; } } else { g_debug ("Using included locale data from container"); g_debug ("Using included gconv modules from container"); } if (g_hash_table_size (libdrm_data_in_provider) > 0 && !all_libdrm_from_provider) { /* See the explanation in the similar * "any_libc_from_provider && !all_libc_from_provider" case, above */ g_warning ("Using libdrm.so.2 from provider system for some but not all " "architectures! Will take /usr/share/libdrm from provider."); } if (g_hash_table_size (libdrm_data_in_provider) == 1) { best_libdrm_data_in_provider = g_strdup ( pv_hash_table_get_arbitrary_key (libdrm_data_in_provider)); } else if (g_hash_table_size (libdrm_data_in_provider) > 1) { g_warning ("Found more than one possible libdrm data directory from provider"); /* Prioritize "/usr/share/libdrm" if available. Otherwise randomly pick * the first directory in the hash table */ if (g_hash_table_contains (libdrm_data_in_provider, "/usr/share/libdrm")) best_libdrm_data_in_provider = g_strdup ("/usr/share/libdrm"); else best_libdrm_data_in_provider = g_strdup ( pv_hash_table_get_arbitrary_key (libdrm_data_in_provider)); } if (best_libdrm_data_in_provider != NULL) { if (!pv_runtime_take_from_provider (self, bwrap, best_libdrm_data_in_provider, "/usr/share/libdrm", TAKE_FROM_PROVIDER_FLAGS_IF_CONTAINER_COMPATIBLE, error)) return FALSE; } g_debug ("Setting up EGL ICD JSON..."); dir_on_host = g_build_filename (self->overrides, "share", "glvnd", "egl_vendor.d", NULL); if (g_mkdir_with_parents (dir_on_host, 0700) != 0) { glnx_throw_errno_prefix (error, "Unable to create %s", dir_on_host); return FALSE; } for (j = 0; j < egl_icd_details->len; j++) { IcdDetails *details = g_ptr_array_index (egl_icd_details, j); SrtEglIcd *icd = SRT_EGL_ICD (details->icd); gboolean need_provider_json = FALSE; if (!srt_egl_icd_check_error (icd, NULL)) continue; for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++) { g_assert (i < G_N_ELEMENTS (details->kinds)); g_assert (i < G_N_ELEMENTS (details->paths_in_container)); if (details->kinds[i] == ICD_KIND_ABSOLUTE) { g_autoptr(SrtEglIcd) replacement = NULL; g_autofree gchar *json_on_host = NULL; g_autofree gchar *json_in_container = NULL; g_autofree gchar *json_base = NULL; g_assert (details->paths_in_container[i] != NULL); json_base = g_strdup_printf ("%" G_GSIZE_FORMAT "-%s.json", j, multiarch_tuples[i]); json_on_host = g_build_filename (dir_on_host, json_base, NULL); json_in_container = g_build_filename (self->overrides_in_container, "share", "glvnd", "egl_vendor.d", json_base, NULL); replacement = srt_egl_icd_new_replace_library_path (icd, details->paths_in_container[i]); if (!srt_egl_icd_write_to_file (replacement, json_on_host, error)) return FALSE; pv_search_path_append (egl_path, json_in_container); } else if (details->kinds[i] == ICD_KIND_SONAME) { need_provider_json = TRUE; } } if (need_provider_json) { g_autofree gchar *json_in_container = NULL; g_autofree gchar *json_base = NULL; const char *json_on_host = srt_egl_icd_get_json_path (icd); json_base = g_strdup_printf ("%" G_GSIZE_FORMAT ".json", j); json_in_container = g_build_filename (self->overrides_in_container, "share", "glvnd", "egl_vendor.d", json_base, NULL); if (!pv_runtime_take_from_provider (self, bwrap, json_on_host, json_in_container, TAKE_FROM_PROVIDER_FLAGS_COPY_FALLBACK, error)) return FALSE; pv_search_path_append (egl_path, json_in_container); } } g_debug ("Setting up Vulkan ICD JSON..."); dir_on_host = g_build_filename (self->overrides, "share", "vulkan", "icd.d", NULL); if (g_mkdir_with_parents (dir_on_host, 0700) != 0) { glnx_throw_errno_prefix (error, "Unable to create %s", dir_on_host); return FALSE; } for (j = 0; j < vulkan_icd_details->len; j++) { IcdDetails *details = g_ptr_array_index (vulkan_icd_details, j); SrtVulkanIcd *icd = SRT_VULKAN_ICD (details->icd); gboolean need_provider_json = FALSE; if (!srt_vulkan_icd_check_error (icd, NULL)) continue; for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++) { g_assert (i < G_N_ELEMENTS (details->kinds)); g_assert (i < G_N_ELEMENTS (details->paths_in_container)); if (details->kinds[i] == ICD_KIND_ABSOLUTE) { g_autoptr(SrtVulkanIcd) replacement = NULL; g_autofree gchar *json_on_host = NULL; g_autofree gchar *json_in_container = NULL; g_autofree gchar *json_base = NULL; g_assert (details->paths_in_container[i] != NULL); json_base = g_strdup_printf ("%" G_GSIZE_FORMAT "-%s.json", j, multiarch_tuples[i]); json_on_host = g_build_filename (dir_on_host, json_base, NULL); json_in_container = g_build_filename (self->overrides_in_container, "share", "vulkan", "icd.d", json_base, NULL); replacement = srt_vulkan_icd_new_replace_library_path (icd, details->paths_in_container[i]); if (!srt_vulkan_icd_write_to_file (replacement, json_on_host, error)) return FALSE; pv_search_path_append (vulkan_path, json_in_container); } else if (details->kinds[i] == ICD_KIND_SONAME) { need_provider_json = TRUE; } } if (need_provider_json) { g_autofree gchar *json_in_container = NULL; g_autofree gchar *json_base = NULL; const char *json_on_host = srt_vulkan_icd_get_json_path (icd); json_base = g_strdup_printf ("%" G_GSIZE_FORMAT ".json", j); json_in_container = g_build_filename (self->overrides_in_container, "share", "vulkan", "icd.d", json_base, NULL); if (!pv_runtime_take_from_provider (self, bwrap, json_on_host, json_in_container, TAKE_FROM_PROVIDER_FLAGS_COPY_FALLBACK, error)) return FALSE; pv_search_path_append (vulkan_path, json_in_container); } } for (j = 0; j < va_api_icd_details->len; j++) { IcdDetails *details = g_ptr_array_index (va_api_icd_details, j); for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++) { g_assert (i < G_N_ELEMENTS (details->kinds)); g_assert (i < G_N_ELEMENTS (details->paths_in_container)); if (details->kinds[i] == ICD_KIND_NONEXISTENT) { continue; } else { g_autofree gchar *parent = NULL; g_assert (details->kinds[i] == ICD_KIND_ABSOLUTE); parent = g_path_get_dirname (details->paths_in_container[i]); pv_search_path_append (va_api_path, parent); } } } if (dri_path->len != 0) flatpak_bwrap_add_args (bwrap, "--setenv", "LIBGL_DRIVERS_PATH", dri_path->str, NULL); else flatpak_bwrap_add_args (bwrap, "--unsetenv", "LIBGL_DRIVERS_PATH", NULL); if (egl_path->len != 0) flatpak_bwrap_add_args (bwrap, "--setenv", "__EGL_VENDOR_LIBRARY_FILENAMES", egl_path->str, NULL); else flatpak_bwrap_add_args (bwrap, "--unsetenv", "__EGL_VENDOR_LIBRARY_FILENAMES", NULL); flatpak_bwrap_add_args (bwrap, "--unsetenv", "__EGL_VENDOR_LIBRARY_DIRS", NULL); if (vulkan_path->len != 0) flatpak_bwrap_add_args (bwrap, "--setenv", "VK_ICD_FILENAMES", vulkan_path->str, NULL); else flatpak_bwrap_add_args (bwrap, "--unsetenv", "VK_ICD_FILENAMES", NULL); if (va_api_path->len != 0) flatpak_bwrap_add_args (bwrap, "--setenv", "LIBVA_DRIVERS_PATH", va_api_path->str, NULL); else flatpak_bwrap_add_args (bwrap, "--unsetenv", "LIBVA_DRIVERS_PATH", NULL); /* We binded the VDPAU drivers in "%{libdir}/vdpau". * Unfortunately VDPAU_DRIVER_PATH can hold just a single path, so we can't * easily list both x86_64 and i386 drivers path. * As a workaround we set VDPAU_DRIVER_PATH to * "/overrides/lib/${PLATFORM}-linux-gnu/vdpau". And because we can't control * the ${PLATFORM} placeholder value we also create symlinks from `i486`, up * to `i686`, to the library directory `i386` that we expect to have * already. */ flatpak_bwrap_add_args (bwrap, "--setenv", "VDPAU_DRIVER_PATH", NULL); flatpak_bwrap_add_arg_printf (bwrap, "%s/lib/${PLATFORM}-linux-gnu/vdpau", self->overrides_in_container); static const char * const extra_multiarch_tuples[] = { "i486-linux-gnu", "i586-linux-gnu", "i686-linux-gnu", NULL }; g_autofree gchar *i386_libdir_in_current_namespace = g_build_filename (self->overrides, "lib", "i386-linux-gnu", NULL); for (i = 0; i < G_N_ELEMENTS (extra_multiarch_tuples) - 1; i++) { g_autofree gchar *extra_libdir_in_current_namespace = g_build_filename (self->overrides, "lib", extra_multiarch_tuples[i], NULL); if (!g_file_test (extra_libdir_in_current_namespace, G_FILE_TEST_EXISTS) && g_file_test (i386_libdir_in_current_namespace, G_FILE_TEST_IS_DIR)) { g_unlink (extra_libdir_in_current_namespace); if (symlink ("i386-linux-gnu", extra_libdir_in_current_namespace) != 0) return glnx_throw_errno_prefix (error, "Unable to create symlink %s -> i386-linux-gnu", extra_libdir_in_current_namespace); } } return TRUE; } gboolean pv_runtime_bind (PvRuntime *self, FlatpakBwrap *bwrap, GError **error) { g_autofree gchar *pressure_vessel_prefix = NULL; g_return_val_if_fail (PV_IS_RUNTIME (self), FALSE); g_return_val_if_fail (!pv_bwrap_was_finished (bwrap), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); if (!bind_runtime (self, bwrap, error)) return FALSE; pressure_vessel_prefix = g_path_get_dirname (self->tools_dir); /* Make sure pressure-vessel itself is visible there. */ if (self->mutable_sysroot != NULL) { g_autofree gchar *dest = NULL; glnx_autofd int parent_dirfd = -1; parent_dirfd = pv_resolve_in_sysroot (self->mutable_sysroot_fd, "/usr/lib/pressure-vessel", PV_RESOLVE_FLAGS_MKDIR_P, NULL, error); if (parent_dirfd < 0) return FALSE; if (!glnx_shutil_rm_rf_at (parent_dirfd, "from-host", NULL, error)) return FALSE; dest = glnx_fdrel_abspath (parent_dirfd, "from-host"); if (!pv_cheap_tree_copy (pressure_vessel_prefix, dest, PV_COPY_FLAGS_NONE, error)) return FALSE; flatpak_bwrap_add_args (bwrap, "--symlink", "/usr/lib/pressure-vessel/from-host", "/run/pressure-vessel/pv-from-host", NULL); self->adverb_in_container = "/usr/lib/pressure-vessel/from-host/bin/pressure-vessel-adverb"; } else { g_autofree gchar *pressure_vessel_prefix_in_host_namespace = pv_current_namespace_path_to_host_path (pressure_vessel_prefix); flatpak_bwrap_add_args (bwrap, "--ro-bind", pressure_vessel_prefix_in_host_namespace, "/run/pressure-vessel/pv-from-host", NULL); self->adverb_in_container = "/run/pressure-vessel/pv-from-host/bin/pressure-vessel-adverb"; } /* Some games detect that they have been run outside the Steam Runtime * and try to re-run themselves via Steam. Trick them into thinking * they are in the LD_LIBRARY_PATH Steam Runtime. * * We do not do this for games developed against soldier, because * backwards compatibility is not a concern for game developers who * have specifically opted-in to using the newer runtime. */ if (self->is_scout) flatpak_bwrap_set_env (bwrap, "STEAM_RUNTIME", "/", TRUE); pv_runtime_set_search_paths (self, bwrap); return TRUE; } void pv_runtime_set_search_paths (PvRuntime *self, FlatpakBwrap *bwrap) { g_autoptr(GString) ld_library_path = g_string_new (""); gsize i; /* TODO: Adapt the use_ld_so_cache code from Flatpak instead * of setting LD_LIBRARY_PATH, for better robustness against * games that set their own LD_LIBRARY_PATH ignoring what they * got from the environment */ g_assert (multiarch_tuples[G_N_ELEMENTS (multiarch_tuples) - 1] == NULL); for (i = 0; i < G_N_ELEMENTS (multiarch_tuples) - 1; i++) { g_autofree gchar *ld_path = NULL; ld_path = g_build_filename (self->overrides_in_container, "lib", multiarch_tuples[i], NULL); pv_search_path_append (ld_library_path, ld_path); } /* This would be filtered out by a setuid bwrap, so we have to go * via --setenv. */ flatpak_bwrap_add_args (bwrap, /* The PATH from outside the container doesn't * really make sense inside the container: * in principle the layout could be totally * different. */ "--setenv", "PATH", "/usr/bin:/bin", "--setenv", "LD_LIBRARY_PATH", ld_library_path->str, NULL); } static void pv_runtime_initable_iface_init (GInitableIface *iface, gpointer unused G_GNUC_UNUSED) { iface->init = pv_runtime_initable_init; }