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-rw-r--r--src/shared/path-lookup.c822
1 files changed, 0 insertions, 822 deletions
diff --git a/src/shared/path-lookup.c b/src/shared/path-lookup.c
deleted file mode 100644
index 862096ae7b..0000000000
--- a/src/shared/path-lookup.c
+++ /dev/null
@@ -1,822 +0,0 @@
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd 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.
-
- systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "alloc-util.h"
-#include "install.h"
-#include "log.h"
-#include "macro.h"
-#include "mkdir.h"
-#include "path-lookup.h"
-#include "path-util.h"
-#include "rm-rf.h"
-#include "stat-util.h"
-#include "string-util.h"
-#include "strv.h"
-#include "util.h"
-
-static int user_runtime_dir(char **ret, const char *suffix) {
- const char *e;
- char *j;
-
- assert(ret);
- assert(suffix);
-
- e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return -ENXIO;
-
- j = strappend(e, suffix);
- if (!j)
- return -ENOMEM;
-
- *ret = j;
- return 0;
-}
-
-static int user_config_dir(char **ret, const char *suffix) {
- const char *e;
- char *j;
-
- assert(ret);
-
- e = getenv("XDG_CONFIG_HOME");
- if (e)
- j = strappend(e, suffix);
- else {
- const char *home;
-
- home = getenv("HOME");
- if (!home)
- return -ENXIO;
-
- j = strjoin(home, "/.config", suffix, NULL);
- }
-
- if (!j)
- return -ENOMEM;
-
- *ret = j;
- return 0;
-}
-
-static int user_data_dir(char **ret, const char *suffix) {
- const char *e;
- char *j;
-
- assert(ret);
- assert(suffix);
-
- /* We don't treat /etc/xdg/systemd here as the spec
- * suggests because we assume that is a link to
- * /etc/systemd/ anyway. */
-
- e = getenv("XDG_DATA_HOME");
- if (e)
- j = strappend(e, suffix);
- else {
- const char *home;
-
- home = getenv("HOME");
- if (!home)
- return -ENXIO;
-
-
- j = strjoin(home, "/.local/share", suffix, NULL);
- }
- if (!j)
- return -ENOMEM;
-
- *ret = j;
- return 1;
-}
-
-static char** user_dirs(
- const char *persistent_config,
- const char *runtime_config,
- const char *generator,
- const char *generator_early,
- const char *generator_late,
- const char *transient,
- const char *persistent_control,
- const char *runtime_control) {
-
- const char * const config_unit_paths[] = {
- USER_CONFIG_UNIT_PATH,
- "/etc/systemd/user",
- NULL
- };
-
- const char * const data_unit_paths[] = {
- "/usr/local/lib/systemd/user",
- "/usr/local/share/systemd/user",
- USER_DATA_UNIT_PATH,
- "/usr/lib/systemd/user",
- "/usr/share/systemd/user",
- NULL
- };
-
- const char *e;
- _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
- _cleanup_free_ char *data_home = NULL;
- _cleanup_free_ char **res = NULL;
- char **tmp;
- int r;
-
- /* Implement the mechanisms defined in
- *
- * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
- *
- * We look in both the config and the data dirs because we
- * want to encourage that distributors ship their unit files
- * as data, and allow overriding as configuration.
- */
-
- e = getenv("XDG_CONFIG_DIRS");
- if (e) {
- config_dirs = strv_split(e, ":");
- if (!config_dirs)
- return NULL;
- }
-
- r = user_data_dir(&data_home, "/systemd/user");
- if (r < 0 && r != -ENXIO)
- return NULL;
-
- e = getenv("XDG_DATA_DIRS");
- if (e)
- data_dirs = strv_split(e, ":");
- else
- data_dirs = strv_new("/usr/local/share",
- "/usr/share",
- NULL);
- if (!data_dirs)
- return NULL;
-
- /* Now merge everything we found. */
- if (strv_extend(&res, persistent_control) < 0)
- return NULL;
-
- if (strv_extend(&res, runtime_control) < 0)
- return NULL;
-
- if (strv_extend(&res, transient) < 0)
- return NULL;
-
- if (strv_extend(&res, generator_early) < 0)
- return NULL;
-
- if (!strv_isempty(config_dirs))
- if (strv_extend_strv_concat(&res, config_dirs, "/systemd/user") < 0)
- return NULL;
-
- if (strv_extend(&res, persistent_config) < 0)
- return NULL;
-
- if (strv_extend_strv(&res, (char**) config_unit_paths, false) < 0)
- return NULL;
-
- if (strv_extend(&res, runtime_config) < 0)
- return NULL;
-
- if (strv_extend(&res, generator) < 0)
- return NULL;
-
- if (strv_extend(&res, data_home) < 0)
- return NULL;
-
- if (!strv_isempty(data_dirs))
- if (strv_extend_strv_concat(&res, data_dirs, "/systemd/user") < 0)
- return NULL;
-
- if (strv_extend_strv(&res, (char**) data_unit_paths, false) < 0)
- return NULL;
-
- if (strv_extend(&res, generator_late) < 0)
- return NULL;
-
- if (path_strv_make_absolute_cwd(res) < 0)
- return NULL;
-
- tmp = res;
- res = NULL;
- return tmp;
-}
-
-static int acquire_generator_dirs(
- UnitFileScope scope,
- char **generator,
- char **generator_early,
- char **generator_late) {
-
- _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL;
- const char *prefix;
-
- assert(generator);
- assert(generator_early);
- assert(generator_late);
-
- switch (scope) {
-
- case UNIT_FILE_SYSTEM:
- prefix = "/run/systemd/";
- break;
-
- case UNIT_FILE_USER: {
- const char *e;
-
- e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return -ENXIO;
-
- prefix = strjoina(e, "/systemd/");
- break;
- }
-
- case UNIT_FILE_GLOBAL:
- return -EOPNOTSUPP;
-
- default:
- assert_not_reached("Hmm, unexpected scope value.");
- }
-
- x = strappend(prefix, "generator");
- if (!x)
- return -ENOMEM;
-
- y = strappend(prefix, "generator.early");
- if (!y)
- return -ENOMEM;
-
- z = strappend(prefix, "generator.late");
- if (!z)
- return -ENOMEM;
-
- *generator = x;
- *generator_early = y;
- *generator_late = z;
-
- x = y = z = NULL;
- return 0;
-}
-
-static int acquire_transient_dir(UnitFileScope scope, char **ret) {
- assert(ret);
-
- switch (scope) {
-
- case UNIT_FILE_SYSTEM: {
- char *transient;
-
- transient = strdup("/run/systemd/transient");
- if (!transient)
- return -ENOMEM;
-
- *ret = transient;
- return 0;
- }
-
- case UNIT_FILE_USER:
- return user_runtime_dir(ret, "/systemd/transient");
-
- case UNIT_FILE_GLOBAL:
- return -EOPNOTSUPP;
-
- default:
- assert_not_reached("Hmm, unexpected scope value.");
- }
-}
-
-static int acquire_config_dirs(UnitFileScope scope, char **persistent, char **runtime) {
- _cleanup_free_ char *a = NULL, *b = NULL;
- int r;
-
- assert(persistent);
- assert(runtime);
-
- switch (scope) {
-
- case UNIT_FILE_SYSTEM:
- a = strdup(SYSTEM_CONFIG_UNIT_PATH);
- b = strdup("/run/systemd/system");
- break;
-
- case UNIT_FILE_GLOBAL:
- a = strdup(USER_CONFIG_UNIT_PATH);
- b = strdup("/run/systemd/user");
- break;
-
- case UNIT_FILE_USER:
- r = user_config_dir(&a, "/systemd/user");
- if (r < 0)
- return r;
-
- r = user_runtime_dir(runtime, "/systemd/user");
- if (r < 0)
- return r;
-
- *persistent = a;
- a = NULL;
-
- return 0;
-
- default:
- assert_not_reached("Hmm, unexpected scope value.");
- }
-
- if (!a || !b)
- return -ENOMEM;
-
- *persistent = a;
- *runtime = b;
- a = b = NULL;
-
- return 0;
-}
-
-static int acquire_control_dirs(UnitFileScope scope, char **persistent, char **runtime) {
- _cleanup_free_ char *a = NULL;
- int r;
-
- assert(persistent);
- assert(runtime);
-
- switch (scope) {
-
- case UNIT_FILE_SYSTEM: {
- _cleanup_free_ char *b = NULL;
-
- a = strdup("/etc/systemd/system.control");
- if (!a)
- return -ENOMEM;
-
- b = strdup("/run/systemd/system.control");
- if (!b)
- return -ENOMEM;
-
- *runtime = b;
- b = NULL;
-
- break;
- }
-
- case UNIT_FILE_USER:
- r = user_config_dir(&a, "/systemd/system.control");
- if (r < 0)
- return r;
-
- r = user_runtime_dir(runtime, "/systemd/system.control");
- if (r < 0)
- return r;
-
- break;
-
- case UNIT_FILE_GLOBAL:
- return -EOPNOTSUPP;
-
- default:
- assert_not_reached("Hmm, unexpected scope value.");
- }
-
- *persistent = a;
- a = NULL;
-
- return 0;
-}
-
-static int patch_root_prefix(char **p, const char *root_dir) {
- char *c;
-
- assert(p);
-
- if (!*p)
- return 0;
-
- c = prefix_root(root_dir, *p);
- if (!c)
- return -ENOMEM;
-
- free(*p);
- *p = c;
-
- return 0;
-}
-
-static int patch_root_prefix_strv(char **l, const char *root_dir) {
- char **i;
- int r;
-
- if (!root_dir)
- return 0;
-
- STRV_FOREACH(i, l) {
- r = patch_root_prefix(i, root_dir);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-int lookup_paths_init(
- LookupPaths *p,
- UnitFileScope scope,
- LookupPathsFlags flags,
- const char *root_dir) {
-
- _cleanup_free_ char
- *root = NULL,
- *persistent_config = NULL, *runtime_config = NULL,
- *generator = NULL, *generator_early = NULL, *generator_late = NULL,
- *transient = NULL,
- *persistent_control = NULL, *runtime_control = NULL;
- bool append = false; /* Add items from SYSTEMD_UNIT_PATH before normal directories */
- _cleanup_strv_free_ char **paths = NULL;
- const char *e;
- int r;
-
- assert(p);
- assert(scope >= 0);
- assert(scope < _UNIT_FILE_SCOPE_MAX);
-
- if (!isempty(root_dir) && !path_equal(root_dir, "/")) {
- if (scope == UNIT_FILE_USER)
- return -EINVAL;
-
- r = is_dir(root_dir, true);
- if (r < 0)
- return r;
- if (r == 0)
- return -ENOTDIR;
-
- root = strdup(root_dir);
- if (!root)
- return -ENOMEM;
- }
-
- r = acquire_config_dirs(scope, &persistent_config, &runtime_config);
- if (r < 0 && r != -ENXIO)
- return r;
-
- if ((flags & LOOKUP_PATHS_EXCLUDE_GENERATED) == 0) {
- r = acquire_generator_dirs(scope, &generator, &generator_early, &generator_late);
- if (r < 0 && r != -EOPNOTSUPP && r != -ENXIO)
- return r;
- }
-
- r = acquire_transient_dir(scope, &transient);
- if (r < 0 && r != -EOPNOTSUPP && r != -ENXIO)
- return r;
-
- r = acquire_control_dirs(scope, &persistent_control, &runtime_control);
- if (r < 0 && r != -EOPNOTSUPP && r != -ENXIO)
- return r;
-
- /* First priority is whatever has been passed to us via env vars */
- e = getenv("SYSTEMD_UNIT_PATH");
- if (e) {
- const char *k;
-
- k = endswith(e, ":");
- if (k) {
- e = strndupa(e, k - e);
- append = true;
- }
-
- /* FIXME: empty components in other places should be
- * rejected. */
-
- r = path_split_and_make_absolute(e, &paths);
- if (r < 0)
- return r;
- }
-
- if (!paths || append) {
- /* Let's figure something out. */
-
- _cleanup_strv_free_ char **add = NULL;
-
- /* For the user units we include share/ in the search
- * path in order to comply with the XDG basedir spec.
- * For the system stuff we avoid such nonsense. OTOH
- * we include /lib in the search path for the system
- * stuff but avoid it for user stuff. */
-
- switch (scope) {
-
- case UNIT_FILE_SYSTEM:
- add = strv_new(
- /* If you modify this you also want to modify
- * systemdsystemunitpath= in systemd.pc.in! */
- STRV_IFNOTNULL(persistent_control),
- STRV_IFNOTNULL(runtime_control),
- STRV_IFNOTNULL(transient),
- STRV_IFNOTNULL(generator_early),
- persistent_config,
- SYSTEM_CONFIG_UNIT_PATH,
- "/etc/systemd/system",
- runtime_config,
- "/run/systemd/system",
- STRV_IFNOTNULL(generator),
- "/usr/local/lib/systemd/system",
- SYSTEM_DATA_UNIT_PATH,
- "/usr/lib/systemd/system",
-#ifdef HAVE_SPLIT_USR
- "/lib/systemd/system",
-#endif
- STRV_IFNOTNULL(generator_late),
- NULL);
- break;
-
- case UNIT_FILE_GLOBAL:
- add = strv_new(
- /* If you modify this you also want to modify
- * systemduserunitpath= in systemd.pc.in, and
- * the arrays in user_dirs() above! */
- STRV_IFNOTNULL(persistent_control),
- STRV_IFNOTNULL(runtime_control),
- STRV_IFNOTNULL(transient),
- STRV_IFNOTNULL(generator_early),
- persistent_config,
- USER_CONFIG_UNIT_PATH,
- "/etc/systemd/user",
- runtime_config,
- "/run/systemd/user",
- STRV_IFNOTNULL(generator),
- "/usr/local/lib/systemd/user",
- "/usr/local/share/systemd/user",
- USER_DATA_UNIT_PATH,
- "/usr/lib/systemd/user",
- "/usr/share/systemd/user",
- STRV_IFNOTNULL(generator_late),
- NULL);
- break;
-
- case UNIT_FILE_USER:
- add = user_dirs(persistent_config, runtime_config,
- generator, generator_early, generator_late,
- transient,
- persistent_config, runtime_control);
- break;
-
- default:
- assert_not_reached("Hmm, unexpected scope?");
- }
-
- if (!add)
- return -ENOMEM;
-
- if (paths) {
- r = strv_extend_strv(&paths, add, true);
- if (r < 0)
- return r;
- } else {
- /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
- * and don't have to copy anything */
- paths = add;
- add = NULL;
- }
- }
-
- r = patch_root_prefix(&persistent_config, root);
- if (r < 0)
- return r;
- r = patch_root_prefix(&runtime_config, root);
- if (r < 0)
- return r;
-
- r = patch_root_prefix(&generator, root);
- if (r < 0)
- return r;
- r = patch_root_prefix(&generator_early, root);
- if (r < 0)
- return r;
- r = patch_root_prefix(&generator_late, root);
- if (r < 0)
- return r;
-
- r = patch_root_prefix(&transient, root);
- if (r < 0)
- return r;
-
- r = patch_root_prefix(&persistent_control, root);
- if (r < 0)
- return r;
-
- r = patch_root_prefix(&runtime_control, root);
- if (r < 0)
- return r;
-
- r = patch_root_prefix_strv(paths, root);
- if (r < 0)
- return -ENOMEM;
-
- p->search_path = strv_uniq(paths);
- paths = NULL;
-
- p->persistent_config = persistent_config;
- p->runtime_config = runtime_config;
- persistent_config = runtime_config = NULL;
-
- p->generator = generator;
- p->generator_early = generator_early;
- p->generator_late = generator_late;
- generator = generator_early = generator_late = NULL;
-
- p->transient = transient;
- transient = NULL;
-
- p->persistent_control = persistent_control;
- p->runtime_control = runtime_control;
- persistent_control = runtime_control = NULL;
-
- p->root_dir = root;
- root = NULL;
-
- return 0;
-}
-
-void lookup_paths_free(LookupPaths *p) {
- if (!p)
- return;
-
- p->search_path = strv_free(p->search_path);
-
- p->persistent_config = mfree(p->persistent_config);
- p->runtime_config = mfree(p->runtime_config);
-
- p->generator = mfree(p->generator);
- p->generator_early = mfree(p->generator_early);
- p->generator_late = mfree(p->generator_late);
-
- p->transient = mfree(p->transient);
-
- p->persistent_control = mfree(p->persistent_control);
- p->runtime_control = mfree(p->runtime_control);
-
- p->root_dir = mfree(p->root_dir);
-}
-
-int lookup_paths_reduce(LookupPaths *p) {
- _cleanup_free_ struct stat *stats = NULL;
- size_t n_stats = 0, allocated = 0;
- unsigned c = 0;
- int r;
-
- assert(p);
-
- /* Drop duplicates and non-existing directories from the search path. We figure out whether two directories are
- * the same by comparing their device and inode numbers. Note one special tweak: when we have a root path set,
- * we do not follow symlinks when retrieving them, because the kernel wouldn't take the root prefix into
- * account when following symlinks. When we have no root path set this restriction does not apply however. */
-
- if (!p->search_path)
- return 0;
-
- while (p->search_path[c]) {
- struct stat st;
- unsigned k;
-
- if (p->root_dir)
- r = lstat(p->search_path[c], &st);
- else
- r = stat(p->search_path[c], &st);
- if (r < 0) {
- if (errno == ENOENT)
- goto remove_item;
-
- /* If something we don't grok happened, let's better leave it in. */
- log_debug_errno(errno, "Failed to stat %s: %m", p->search_path[c]);
- c++;
- continue;
- }
-
- for (k = 0; k < n_stats; k++) {
- if (stats[k].st_dev == st.st_dev &&
- stats[k].st_ino == st.st_ino)
- break;
- }
-
- if (k < n_stats) /* Is there already an entry with the same device/inode? */
- goto remove_item;
-
- if (!GREEDY_REALLOC(stats, allocated, n_stats+1))
- return -ENOMEM;
-
- stats[n_stats++] = st;
- c++;
- continue;
-
- remove_item:
- free(p->search_path[c]);
- memmove(p->search_path + c,
- p->search_path + c + 1,
- (strv_length(p->search_path + c + 1) + 1) * sizeof(char*));
- }
-
- if (strv_isempty(p->search_path)) {
- log_debug("Ignoring unit files.");
- p->search_path = strv_free(p->search_path);
- } else {
- _cleanup_free_ char *t;
-
- t = strv_join(p->search_path, "\n\t");
- if (!t)
- return -ENOMEM;
-
- log_debug("Looking for unit files in (higher priority first):\n\t%s", t);
- }
-
- return 0;
-}
-
-int lookup_paths_mkdir_generator(LookupPaths *p) {
- int r, q;
-
- assert(p);
-
- if (!p->generator || !p->generator_early || !p->generator_late)
- return -EINVAL;
-
- r = mkdir_p_label(p->generator, 0755);
-
- q = mkdir_p_label(p->generator_early, 0755);
- if (q < 0 && r >= 0)
- r = q;
-
- q = mkdir_p_label(p->generator_late, 0755);
- if (q < 0 && r >= 0)
- r = q;
-
- return r;
-}
-
-void lookup_paths_trim_generator(LookupPaths *p) {
- assert(p);
-
- /* Trim empty dirs */
-
- if (p->generator)
- (void) rmdir(p->generator);
- if (p->generator_early)
- (void) rmdir(p->generator_early);
- if (p->generator_late)
- (void) rmdir(p->generator_late);
-}
-
-void lookup_paths_flush_generator(LookupPaths *p) {
- assert(p);
-
- /* Flush the generated unit files in full */
-
- if (p->generator)
- (void) rm_rf(p->generator, REMOVE_ROOT);
- if (p->generator_early)
- (void) rm_rf(p->generator_early, REMOVE_ROOT);
- if (p->generator_late)
- (void) rm_rf(p->generator_late, REMOVE_ROOT);
-}
-
-char **generator_binary_paths(UnitFileScope scope) {
-
- switch (scope) {
-
- case UNIT_FILE_SYSTEM:
- return strv_new("/run/systemd/system-generators",
- "/etc/systemd/system-generators",
- "/usr/local/lib/systemd/system-generators",
- SYSTEM_GENERATOR_PATH,
- NULL);
-
- case UNIT_FILE_GLOBAL:
- case UNIT_FILE_USER:
- return strv_new("/run/systemd/user-generators",
- "/etc/systemd/user-generators",
- "/usr/local/lib/systemd/user-generators",
- USER_GENERATOR_PATH,
- NULL);
-
- default:
- assert_not_reached("Hmm, unexpected scope.");
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-07 06:17:31 +0000