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-rw-r--r--src/libsystemd/sd-path/sd-path.c691
1 files changed, 691 insertions, 0 deletions
diff --git a/src/libsystemd/sd-path/sd-path.c b/src/libsystemd/sd-path/sd-path.c
new file mode 100644
index 0000000..61ed7cb
--- /dev/null
+++ b/src/libsystemd/sd-path/sd-path.c
@@ -0,0 +1,691 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "sd-path.h"
+
+#include "alloc-util.h"
+#include "architecture.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "path-lookup.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "util.h"
+
+static int from_environment(const char *envname, const char *fallback, const char **ret) {
+ assert(ret);
+
+ if (envname) {
+ const char *e;
+
+ e = secure_getenv(envname);
+ if (e && path_is_absolute(e)) {
+ *ret = e;
+ return 0;
+ }
+ }
+
+ if (fallback) {
+ *ret = fallback;
+ return 0;
+ }
+
+ return -ENXIO;
+}
+
+static int from_home_dir(const char *envname, const char *suffix, char **buffer, const char **ret) {
+ _cleanup_free_ char *h = NULL;
+ char *cc = NULL;
+ int r;
+
+ assert(suffix);
+ assert(buffer);
+ assert(ret);
+
+ if (envname) {
+ const char *e = NULL;
+
+ e = secure_getenv(envname);
+ if (e && path_is_absolute(e)) {
+ *ret = e;
+ return 0;
+ }
+ }
+
+ r = get_home_dir(&h);
+ if (r < 0)
+ return r;
+
+ cc = path_join(h, suffix);
+ if (!cc)
+ return -ENOMEM;
+
+ *buffer = cc;
+ *ret = cc;
+ return 0;
+}
+
+static int from_user_dir(const char *field, char **buffer, const char **ret) {
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char *b = NULL;
+ _cleanup_free_ const char *fn = NULL;
+ const char *c = NULL;
+ size_t n;
+ int r;
+
+ assert(field);
+ assert(buffer);
+ assert(ret);
+
+ r = from_home_dir("XDG_CONFIG_HOME", ".config", &b, &c);
+ if (r < 0)
+ return r;
+
+ fn = path_join(c, "user-dirs.dirs");
+ if (!fn)
+ return -ENOMEM;
+
+ f = fopen(fn, "re");
+ if (!f) {
+ if (errno == ENOENT)
+ goto fallback;
+
+ return -errno;
+ }
+
+ /* This is an awful parse, but it follows closely what
+ * xdg-user-dirs does upstream */
+
+ n = strlen(field);
+ for (;;) {
+ _cleanup_free_ char *line = NULL;
+ char *l, *p, *e;
+
+ r = read_line(f, LONG_LINE_MAX, &line);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ l = strstrip(line);
+
+ if (!strneq(l, field, n))
+ continue;
+
+ p = l + n;
+ p += strspn(p, WHITESPACE);
+
+ if (*p != '=')
+ continue;
+ p++;
+
+ p += strspn(p, WHITESPACE);
+
+ if (*p != '"')
+ continue;
+ p++;
+
+ e = strrchr(p, '"');
+ if (!e)
+ continue;
+ *e = 0;
+
+ /* Three syntaxes permitted: relative to $HOME, $HOME itself, and absolute path */
+ if (startswith(p, "$HOME/")) {
+ _cleanup_free_ char *h = NULL;
+ char *cc;
+
+ r = get_home_dir(&h);
+ if (r < 0)
+ return r;
+
+ cc = path_join(h, p+5);
+ if (!cc)
+ return -ENOMEM;
+
+ *buffer = cc;
+ *ret = cc;
+ return 0;
+ } else if (streq(p, "$HOME")) {
+
+ r = get_home_dir(buffer);
+ if (r < 0)
+ return r;
+
+ *ret = *buffer;
+ return 0;
+ } else if (path_is_absolute(p)) {
+ char *copy;
+
+ copy = strdup(p);
+ if (!copy)
+ return -ENOMEM;
+
+ *buffer = copy;
+ *ret = copy;
+ return 0;
+ }
+ }
+
+fallback:
+ /* The desktop directory defaults to $HOME/Desktop, the others to $HOME */
+ if (streq(field, "XDG_DESKTOP_DIR")) {
+ _cleanup_free_ char *h = NULL;
+ char *cc;
+
+ r = get_home_dir(&h);
+ if (r < 0)
+ return r;
+
+ cc = path_join(h, "Desktop");
+ if (!cc)
+ return -ENOMEM;
+
+ *buffer = cc;
+ *ret = cc;
+ } else {
+
+ r = get_home_dir(buffer);
+ if (r < 0)
+ return r;
+
+ *ret = *buffer;
+ }
+
+ return 0;
+}
+
+static int get_path(uint64_t type, char **buffer, const char **ret) {
+ int r;
+
+ assert(buffer);
+ assert(ret);
+
+ switch (type) {
+
+ case SD_PATH_TEMPORARY:
+ return tmp_dir(ret);
+
+ case SD_PATH_TEMPORARY_LARGE:
+ return var_tmp_dir(ret);
+
+ case SD_PATH_SYSTEM_BINARIES:
+ *ret = "/usr/bin";
+ return 0;
+
+ case SD_PATH_SYSTEM_INCLUDE:
+ *ret = "/usr/include";
+ return 0;
+
+ case SD_PATH_SYSTEM_LIBRARY_PRIVATE:
+ *ret = "/usr/lib";
+ return 0;
+
+ case SD_PATH_SYSTEM_LIBRARY_ARCH:
+ *ret = LIBDIR;
+ return 0;
+
+ case SD_PATH_SYSTEM_SHARED:
+ *ret = "/usr/share";
+ return 0;
+
+ case SD_PATH_SYSTEM_CONFIGURATION_FACTORY:
+ *ret = "/usr/share/factory/etc";
+ return 0;
+
+ case SD_PATH_SYSTEM_STATE_FACTORY:
+ *ret = "/usr/share/factory/var";
+ return 0;
+
+ case SD_PATH_SYSTEM_CONFIGURATION:
+ *ret = "/etc";
+ return 0;
+
+ case SD_PATH_SYSTEM_RUNTIME:
+ *ret = "/run";
+ return 0;
+
+ case SD_PATH_SYSTEM_RUNTIME_LOGS:
+ *ret = "/run/log";
+ return 0;
+
+ case SD_PATH_SYSTEM_STATE_PRIVATE:
+ *ret = "/var/lib";
+ return 0;
+
+ case SD_PATH_SYSTEM_STATE_LOGS:
+ *ret = "/var/log";
+ return 0;
+
+ case SD_PATH_SYSTEM_STATE_CACHE:
+ *ret = "/var/cache";
+ return 0;
+
+ case SD_PATH_SYSTEM_STATE_SPOOL:
+ *ret = "/var/spool";
+ return 0;
+
+ case SD_PATH_USER_BINARIES:
+ return from_home_dir(NULL, ".local/bin", buffer, ret);
+
+ case SD_PATH_USER_LIBRARY_PRIVATE:
+ return from_home_dir(NULL, ".local/lib", buffer, ret);
+
+ case SD_PATH_USER_LIBRARY_ARCH:
+ return from_home_dir(NULL, ".local/lib/" LIB_ARCH_TUPLE, buffer, ret);
+
+ case SD_PATH_USER_SHARED:
+ return from_home_dir("XDG_DATA_HOME", ".local/share", buffer, ret);
+
+ case SD_PATH_USER_CONFIGURATION:
+ return from_home_dir("XDG_CONFIG_HOME", ".config", buffer, ret);
+
+ case SD_PATH_USER_RUNTIME:
+ return from_environment("XDG_RUNTIME_DIR", NULL, ret);
+
+ case SD_PATH_USER_STATE_CACHE:
+ return from_home_dir("XDG_CACHE_HOME", ".cache", buffer, ret);
+
+ case SD_PATH_USER:
+ r = get_home_dir(buffer);
+ if (r < 0)
+ return r;
+
+ *ret = *buffer;
+ return 0;
+
+ case SD_PATH_USER_DOCUMENTS:
+ return from_user_dir("XDG_DOCUMENTS_DIR", buffer, ret);
+
+ case SD_PATH_USER_MUSIC:
+ return from_user_dir("XDG_MUSIC_DIR", buffer, ret);
+
+ case SD_PATH_USER_PICTURES:
+ return from_user_dir("XDG_PICTURES_DIR", buffer, ret);
+
+ case SD_PATH_USER_VIDEOS:
+ return from_user_dir("XDG_VIDEOS_DIR", buffer, ret);
+
+ case SD_PATH_USER_DOWNLOAD:
+ return from_user_dir("XDG_DOWNLOAD_DIR", buffer, ret);
+
+ case SD_PATH_USER_PUBLIC:
+ return from_user_dir("XDG_PUBLICSHARE_DIR", buffer, ret);
+
+ case SD_PATH_USER_TEMPLATES:
+ return from_user_dir("XDG_TEMPLATES_DIR", buffer, ret);
+
+ case SD_PATH_USER_DESKTOP:
+ return from_user_dir("XDG_DESKTOP_DIR", buffer, ret);
+
+ case SD_PATH_SYSTEMD_UTIL:
+ *ret = ROOTPREFIX_NOSLASH "/lib/systemd";
+ return 0;
+
+ case SD_PATH_SYSTEMD_SYSTEM_UNIT:
+ *ret = SYSTEM_DATA_UNIT_PATH;
+ return 0;
+
+ case SD_PATH_SYSTEMD_SYSTEM_PRESET:
+ *ret = ROOTPREFIX_NOSLASH "/lib/systemd/system-preset";
+ return 0;
+
+ case SD_PATH_SYSTEMD_USER_UNIT:
+ *ret = USER_DATA_UNIT_DIR;
+ return 0;
+
+ case SD_PATH_SYSTEMD_USER_PRESET:
+ *ret = ROOTPREFIX_NOSLASH "/lib/systemd/user-preset";
+ return 0;
+
+ case SD_PATH_SYSTEMD_SYSTEM_CONF:
+ *ret = SYSTEM_CONFIG_UNIT_DIR;
+ return 0;
+
+ case SD_PATH_SYSTEMD_USER_CONF:
+ *ret = USER_CONFIG_UNIT_DIR;
+ return 0;
+
+ case SD_PATH_SYSTEMD_SYSTEM_GENERATOR:
+ *ret = SYSTEM_GENERATOR_DIR;
+ return 0;
+
+ case SD_PATH_SYSTEMD_USER_GENERATOR:
+ *ret = USER_GENERATOR_DIR;
+ return 0;
+
+ case SD_PATH_SYSTEMD_SLEEP:
+ *ret = ROOTPREFIX_NOSLASH "/lib/systemd/system-sleep";
+ return 0;
+
+ case SD_PATH_SYSTEMD_SHUTDOWN:
+ *ret = ROOTPREFIX_NOSLASH "/lib/systemd/system-shutdown";
+ return 0;
+
+ case SD_PATH_TMPFILES:
+ *ret = "/usr/lib/tmpfiles.d";
+ return 0;
+
+ case SD_PATH_SYSUSERS:
+ *ret = ROOTPREFIX_NOSLASH "/lib/sysusers.d";
+ return 0;
+
+ case SD_PATH_SYSCTL:
+ *ret = ROOTPREFIX_NOSLASH "/lib/sysctl.d";
+ return 0;
+
+ case SD_PATH_BINFMT:
+ *ret = ROOTPREFIX_NOSLASH "/lib/binfmt.d";
+ return 0;
+
+ case SD_PATH_MODULES_LOAD:
+ *ret = ROOTPREFIX_NOSLASH "/lib/modules-load.d";
+ return 0;
+
+ case SD_PATH_CATALOG:
+ *ret = "/usr/lib/systemd/catalog";
+ return 0;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static int get_path_alloc(uint64_t type, const char *suffix, char **path) {
+ _cleanup_free_ char *buffer = NULL;
+ char *buffer2 = NULL;
+ const char *ret;
+ int r;
+
+ assert(path);
+
+ r = get_path(type, &buffer, &ret);
+ if (r < 0)
+ return r;
+
+ if (suffix) {
+ suffix += strspn(suffix, "/");
+ buffer2 = path_join(ret, suffix);
+ if (!buffer2)
+ return -ENOMEM;
+ } else if (!buffer) {
+ buffer = strdup(ret);
+ if (!buffer)
+ return -ENOMEM;
+ }
+
+ *path = buffer2 ?: TAKE_PTR(buffer);
+ return 0;
+}
+
+_public_ int sd_path_lookup(uint64_t type, const char *suffix, char **path) {
+ int r;
+
+ assert_return(path, -EINVAL);
+
+ r = get_path_alloc(type, suffix, path);
+ if (r != -EOPNOTSUPP)
+ return r;
+
+ /* Fall back to sd_path_lookup_strv */
+ _cleanup_strv_free_ char **l = NULL;
+ char *buffer;
+
+ r = sd_path_lookup_strv(type, suffix, &l);
+ if (r < 0)
+ return r;
+
+ buffer = strv_join(l, ":");
+ if (!buffer)
+ return -ENOMEM;
+
+ *path = buffer;
+ return 0;
+}
+
+static int search_from_environment(
+ char ***list,
+ const char *env_home,
+ const char *home_suffix,
+ const char *env_search,
+ bool env_search_sufficient,
+ const char *first, ...) {
+
+ _cleanup_strv_free_ char **l = NULL;
+ const char *e;
+ char *h = NULL;
+ int r;
+
+ assert(list);
+
+ if (env_search) {
+ e = secure_getenv(env_search);
+ if (e) {
+ l = strv_split(e, ":");
+ if (!l)
+ return -ENOMEM;
+
+ if (env_search_sufficient) {
+ *list = TAKE_PTR(l);
+ return 0;
+ }
+ }
+ }
+
+ if (!l && first) {
+ va_list ap;
+
+ va_start(ap, first);
+ l = strv_new_ap(first, ap);
+ va_end(ap);
+
+ if (!l)
+ return -ENOMEM;
+ }
+
+ if (env_home) {
+ e = secure_getenv(env_home);
+ if (e && path_is_absolute(e)) {
+ h = strdup(e);
+ if (!h)
+ return -ENOMEM;
+ }
+ }
+
+ if (!h && home_suffix) {
+ e = secure_getenv("HOME");
+ if (e && path_is_absolute(e)) {
+ h = path_join(e, home_suffix);
+ if (!h)
+ return -ENOMEM;
+ }
+ }
+
+ if (h) {
+ r = strv_consume_prepend(&l, h);
+ if (r < 0)
+ return -ENOMEM;
+ }
+
+ *list = TAKE_PTR(l);
+ return 0;
+}
+
+#if HAVE_SPLIT_BIN
+# define ARRAY_SBIN_BIN(x) x "sbin", x "bin"
+#else
+# define ARRAY_SBIN_BIN(x) x "bin"
+#endif
+
+static int get_search(uint64_t type, char ***list) {
+ int r;
+
+ assert(list);
+
+ switch(type) {
+
+ case SD_PATH_SEARCH_BINARIES:
+ return search_from_environment(list,
+ NULL,
+ ".local/bin",
+ "PATH",
+ true,
+ ARRAY_SBIN_BIN("/usr/local/"),
+ ARRAY_SBIN_BIN("/usr/"),
+#if HAVE_SPLIT_USR
+ ARRAY_SBIN_BIN("/"),
+#endif
+ NULL);
+
+ case SD_PATH_SEARCH_LIBRARY_PRIVATE:
+ return search_from_environment(list,
+ NULL,
+ ".local/lib",
+ NULL,
+ false,
+ "/usr/local/lib",
+ "/usr/lib",
+#if HAVE_SPLIT_USR
+ "/lib",
+#endif
+ NULL);
+
+ case SD_PATH_SEARCH_LIBRARY_ARCH:
+ return search_from_environment(list,
+ NULL,
+ ".local/lib/" LIB_ARCH_TUPLE,
+ "LD_LIBRARY_PATH",
+ true,
+ LIBDIR,
+#if HAVE_SPLIT_USR
+ ROOTLIBDIR,
+#endif
+ NULL);
+
+ case SD_PATH_SEARCH_SHARED:
+ return search_from_environment(list,
+ "XDG_DATA_HOME",
+ ".local/share",
+ "XDG_DATA_DIRS",
+ false,
+ "/usr/local/share",
+ "/usr/share",
+ NULL);
+
+ case SD_PATH_SEARCH_CONFIGURATION_FACTORY:
+ return search_from_environment(list,
+ NULL,
+ NULL,
+ NULL,
+ false,
+ "/usr/local/share/factory/etc",
+ "/usr/share/factory/etc",
+ NULL);
+
+ case SD_PATH_SEARCH_STATE_FACTORY:
+ return search_from_environment(list,
+ NULL,
+ NULL,
+ NULL,
+ false,
+ "/usr/local/share/factory/var",
+ "/usr/share/factory/var",
+ NULL);
+
+ case SD_PATH_SEARCH_CONFIGURATION:
+ return search_from_environment(list,
+ "XDG_CONFIG_HOME",
+ ".config",
+ "XDG_CONFIG_DIRS",
+ false,
+ "/etc",
+ NULL);
+
+ case SD_PATH_SEARCH_BINARIES_DEFAULT:
+ return strv_from_nulstr(list, DEFAULT_PATH_NULSTR);
+
+ case SD_PATH_SYSTEMD_SEARCH_SYSTEM_UNIT:
+ case SD_PATH_SYSTEMD_SEARCH_USER_UNIT: {
+ _cleanup_(lookup_paths_free) LookupPaths lp = {};
+ const UnitFileScope scope = type == SD_PATH_SYSTEMD_SEARCH_SYSTEM_UNIT ?
+ UNIT_FILE_SYSTEM : UNIT_FILE_USER;
+
+ r = lookup_paths_init(&lp, scope, 0, NULL);
+ if (r < 0)
+ return r;
+
+ *list = TAKE_PTR(lp.search_path);
+ return 0;
+ }
+
+ case SD_PATH_SYSTEMD_SEARCH_SYSTEM_GENERATOR:
+ case SD_PATH_SYSTEMD_SEARCH_USER_GENERATOR: {
+ char **t;
+ const UnitFileScope scope = type == SD_PATH_SYSTEMD_SEARCH_SYSTEM_GENERATOR ?
+ UNIT_FILE_SYSTEM : UNIT_FILE_USER;
+
+ t = generator_binary_paths(scope);
+ if (!t)
+ return -ENOMEM;
+
+ *list = t;
+ return 0;
+ }
+
+ case SD_PATH_SYSTEMD_SEARCH_NETWORK:
+ return strv_from_nulstr(list, NETWORK_DIRS_NULSTR);
+
+ }
+
+ return -EOPNOTSUPP;
+}
+
+_public_ int sd_path_lookup_strv(uint64_t type, const char *suffix, char ***paths) {
+ _cleanup_strv_free_ char **l = NULL, **n = NULL;
+ int r;
+
+ assert_return(paths, -EINVAL);
+
+ r = get_search(type, &l);
+ if (r == -EOPNOTSUPP) {
+ _cleanup_free_ char *t = NULL;
+
+ r = get_path_alloc(type, suffix, &t);
+ if (r < 0)
+ return r;
+
+ l = new(char*, 2);
+ if (!l)
+ return -ENOMEM;
+ l[0] = TAKE_PTR(t);
+ l[1] = NULL;
+
+ *paths = TAKE_PTR(l);
+ return 0;
+
+ } else if (r < 0)
+ return r;
+
+ if (!suffix) {
+ *paths = TAKE_PTR(l);
+ return 0;
+ }
+
+ n = new(char*, strv_length(l)+1);
+ if (!n)
+ return -ENOMEM;
+
+ char **i, **j = n;
+ STRV_FOREACH(i, l) {
+ *j = path_join(*i, suffix);
+ if (!*j)
+ return -ENOMEM;
+
+ j++;
+ }
+ *j = NULL;
+
+ *paths = TAKE_PTR(n);
+ return 0;
+}
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