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-rw-r--r--src/shared/install.c234
1 files changed, 224 insertions, 10 deletions
diff --git a/src/shared/install.c b/src/shared/install.c
index 8fc9205107..8d9f96553b 100644
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -45,6 +45,7 @@
#include "mkdir.h"
#include "path-lookup.h"
#include "path-util.h"
+#include "rm-rf.h"
#include "set.h"
#include "special.h"
#include "stat-util.h"
@@ -136,27 +137,35 @@ static int path_is_transient(const LookupPaths *p, const char *path) {
return path_equal(p->transient, parent);
}
-static int path_is_config(const LookupPaths *p, const char *path) {
+static int path_is_control(const LookupPaths *p, const char *path) {
_cleanup_free_ char *parent = NULL;
- const char *rpath;
assert(p);
assert(path);
- /* Checks whether the specified path is intended for configuration or is outside of it. We check both the
- * top-level directory and the one actually configured. The latter is particularly relevant for cases where we
- * operate on a root directory. */
+ parent = dirname_malloc(path);
+ if (!parent)
+ return -ENOMEM;
- rpath = skip_root(p, path);
- if (rpath && (path_startswith(rpath, "/etc") || path_startswith(rpath, "/run")))
- return true;
+ return path_equal(parent, p->persistent_control) ||
+ path_equal(parent, p->runtime_control);
+}
+
+static int path_is_config(const LookupPaths *p, const char *path) {
+ _cleanup_free_ char *parent = NULL;
+
+ assert(p);
+ assert(path);
+
+ /* Note that we do *not* have generic checks for /etc or /run in place, since with them we couldn't discern
+ * configuration from transient or generated units */
parent = dirname_malloc(path);
if (!parent)
return -ENOMEM;
return path_equal(parent, p->persistent_config) ||
- path_equal(parent, p->runtime_config);
+ path_equal(parent, p->runtime_config);
}
static int path_is_runtime(const LookupPaths *p, const char *path) {
@@ -166,6 +175,9 @@ static int path_is_runtime(const LookupPaths *p, const char *path) {
assert(p);
assert(path);
+ /* Everything in /run is considered runtime. On top of that we also add explicit checks for the various runtime
+ * directories, as safety net. */
+
rpath = skip_root(p, path);
if (rpath && path_startswith(rpath, "/run"))
return true;
@@ -174,7 +186,33 @@ static int path_is_runtime(const LookupPaths *p, const char *path) {
if (!parent)
return -ENOMEM;
- return path_equal(parent, p->runtime_config);
+ return path_equal(parent, p->runtime_config) ||
+ path_equal(parent, p->generator) ||
+ path_equal(parent, p->generator_early) ||
+ path_equal(parent, p->generator_late) ||
+ path_equal(parent, p->transient) ||
+ path_equal(parent, p->runtime_control);
+}
+
+static int path_is_vendor(const LookupPaths *p, const char *path) {
+ const char *rpath;
+
+ assert(p);
+ assert(path);
+
+ rpath = skip_root(p, path);
+ if (!rpath)
+ return 0;
+
+ if (path_startswith(rpath, "/usr"))
+ return true;
+
+#ifdef HAVE_SPLIT_USR
+ if (path_startswith(rpath, "/lib"))
+ return true;
+#endif
+
+ return path_equal(rpath, SYSTEM_DATA_UNIT_PATH);
}
int unit_file_changes_add(
@@ -1703,6 +1741,182 @@ int unit_file_link(
return r;
}
+static int path_shall_revert(const LookupPaths *paths, const char *path) {
+ int r;
+
+ assert(paths);
+ assert(path);
+
+ /* Checks whether the path is one where the drop-in directories shall be removed. */
+
+ r = path_is_config(paths, path);
+ if (r != 0)
+ return r;
+
+ r = path_is_control(paths, path);
+ if (r != 0)
+ return r;
+
+ return path_is_transient(paths, path);
+}
+
+int unit_file_revert(
+ UnitFileScope scope,
+ const char *root_dir,
+ char **files,
+ UnitFileChange **changes,
+ unsigned *n_changes) {
+
+ _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
+ /* _cleanup_(install_context_done) InstallContext c = {}; */
+ _cleanup_lookup_paths_free_ LookupPaths paths = {};
+ _cleanup_strv_free_ char **todo = NULL;
+ size_t n_todo = 0, n_allocated = 0;
+ char **i;
+ int r, q;
+
+ /* Puts a unit file back into vendor state. This means:
+ *
+ * a) we remove all drop-in snippets added by the user ("config"), add to transient units ("transient"), and
+ * added via "systemctl set-property" ("control"), but not if the drop-in is generated ("generated").
+ *
+ * c) if there's a vendor unit file (i.e. one in /usr) we remove any configured overriding unit files (i.e. in
+ * "config", but not in "transient" or "control" or even "generated").
+ *
+ * We remove all that in both the runtime and the persistant directories, if that applies.
+ */
+
+ r = lookup_paths_init(&paths, scope, 0, root_dir);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(i, files) {
+ bool has_vendor = false;
+ char **p;
+
+ if (!unit_name_is_valid(*i, UNIT_NAME_ANY))
+ return -EINVAL;
+
+ STRV_FOREACH(p, paths.search_path) {
+ _cleanup_free_ char *path = NULL, *dropin = NULL;
+ struct stat st;
+
+ path = path_make_absolute(*i, *p);
+ if (!path)
+ return -ENOMEM;
+
+ r = lstat(path, &st);
+ if (r < 0) {
+ if (errno != ENOENT)
+ return -errno;
+ } else if (S_ISREG(st.st_mode)) {
+ /* Check if there's a vendor version */
+ r = path_is_vendor(&paths, path);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ has_vendor = true;
+ }
+
+ dropin = strappend(path, ".d");
+ if (!dropin)
+ return -ENOMEM;
+
+ r = lstat(dropin, &st);
+ if (r < 0) {
+ if (errno != ENOENT)
+ return -errno;
+ } else if (S_ISDIR(st.st_mode)) {
+ /* Remove the drop-ins */
+ r = path_shall_revert(&paths, dropin);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2))
+ return -ENOMEM;
+
+ todo[n_todo++] = dropin;
+ dropin = NULL;
+ }
+ }
+ }
+
+ if (!has_vendor)
+ continue;
+
+ /* OK, there's a vendor version, hence drop all configuration versions */
+ STRV_FOREACH(p, paths.search_path) {
+ _cleanup_free_ char *path = NULL;
+ struct stat st;
+
+ path = path_make_absolute(*i, *p);
+ if (!path)
+ return -ENOMEM;
+
+ r = lstat(path, &st);
+ if (r < 0) {
+ if (errno != ENOENT)
+ return -errno;
+ } else if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
+ r = path_is_config(&paths, path);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2))
+ return -ENOMEM;
+
+ todo[n_todo++] = path;
+ path = NULL;
+ }
+ }
+ }
+ }
+
+ strv_uniq(todo);
+
+ r = 0;
+ STRV_FOREACH(i, todo) {
+ _cleanup_strv_free_ char **fs = NULL;
+ const char *rp;
+ char **j;
+
+ (void) get_files_in_directory(*i, &fs);
+
+ q = rm_rf(*i, REMOVE_ROOT|REMOVE_PHYSICAL);
+ if (q < 0 && q != -ENOENT && r >= 0) {
+ r = q;
+ continue;
+ }
+
+ STRV_FOREACH(j, fs) {
+ _cleanup_free_ char *t = NULL;
+
+ t = strjoin(*i, "/", *j, NULL);
+ if (!t)
+ return -ENOMEM;
+
+ unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, t, NULL);
+ }
+
+ unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, *i, NULL);
+
+ rp = skip_root(&paths, *i);
+ q = mark_symlink_for_removal(&remove_symlinks_to, rp ?: *i);
+ if (q < 0)
+ return q;
+ }
+
+ q = remove_marked_symlinks(remove_symlinks_to, paths.runtime_config, &paths, changes, n_changes);
+ if (r >= 0)
+ r = q;
+
+ q = remove_marked_symlinks(remove_symlinks_to, paths.persistent_config, &paths, changes, n_changes);
+ if (r >= 0)
+ r = q;
+
+ return r;
+}
+
int unit_file_add_dependency(
UnitFileScope scope,
bool runtime,
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-04 05:20:47 +0000