diff options
Diffstat (limited to 'src/shared')
| -rw-r--r-- | src/shared/install.c | 234 | ||||
| -rw-r--r-- | src/shared/install.h | 3 |
2 files changed, 226 insertions, 11 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, diff --git a/src/shared/install.h b/src/shared/install.h index 8d54fd14ad..6f8b45d4f6 100644 --- a/src/shared/install.h +++ b/src/shared/install.h @@ -128,11 +128,12 @@ static inline bool UNIT_FILE_INSTALL_INFO_HAS_ALSO(UnitFileInstallInfo *i) { int unit_file_enable(UnitFileScope scope, bool runtime, const char *root_dir, char **files, bool force, UnitFileChange **changes, unsigned *n_changes); int unit_file_disable(UnitFileScope scope, bool runtime, const char *root_dir, char **files, UnitFileChange **changes, unsigned *n_changes); int unit_file_reenable(UnitFileScope scope, bool runtime, const char *root_dir, char **files, bool force, UnitFileChange **changes, unsigned *n_changes); -int unit_file_link(UnitFileScope scope, bool runtime, const char *root_dir, char **files, bool force, UnitFileChange **changes, unsigned *n_changes); int unit_file_preset(UnitFileScope scope, bool runtime, const char *root_dir, char **files, UnitFilePresetMode mode, bool force, UnitFileChange **changes, unsigned *n_changes); int unit_file_preset_all(UnitFileScope scope, bool runtime, const char *root_dir, UnitFilePresetMode mode, bool force, UnitFileChange **changes, unsigned *n_changes); int unit_file_mask(UnitFileScope scope, bool runtime, const char *root_dir, char **files, bool force, UnitFileChange **changes, unsigned *n_changes); int unit_file_unmask(UnitFileScope scope, bool runtime, const char *root_dir, char **files, UnitFileChange **changes, unsigned *n_changes); +int unit_file_link(UnitFileScope scope, bool runtime, const char *root_dir, char **files, bool force, UnitFileChange **changes, unsigned *n_changes); +int unit_file_revert(UnitFileScope scope, const char *root_dir, char **files, UnitFileChange **changes, unsigned *n_changes); int unit_file_set_default(UnitFileScope scope, const char *root_dir, const char *file, bool force, UnitFileChange **changes, unsigned *n_changes); int unit_file_get_default(UnitFileScope scope, const char *root_dir, char **name); int unit_file_add_dependency(UnitFileScope scope, bool runtime, const char *root_dir, char **files, const char *target, UnitDependency dep, bool force, UnitFileChange **changes, unsigned *n_changes); 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