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Diffstat (limited to 'src/grp-utils/systemd-path/sd-path.c')
-rw-r--r--src/grp-utils/systemd-path/sd-path.c638
1 files changed, 638 insertions, 0 deletions
diff --git a/src/grp-utils/systemd-path/sd-path.c b/src/grp-utils/systemd-path/sd-path.c
new file mode 100644
index 0000000000..b36bc34e58
--- /dev/null
+++ b/src/grp-utils/systemd-path/sd-path.c
@@ -0,0 +1,638 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2014 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 "systemd-basic/alloc-util.h"
+#include "systemd-basic/architecture.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/missing.h"
+#include "systemd-basic/path-util.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/strv.h"
+#include "systemd-basic/user-util.h"
+#include "systemd-basic/util.h"
+
+#include "sd-path.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;
+
+ if (endswith(h, "/"))
+ cc = strappend(h, suffix);
+ else
+ cc = strjoin(h, "/", suffix, NULL);
+ 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;
+ char line[LINE_MAX];
+ 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 = strappend(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);
+ FOREACH_LINE(line, f, return -errno) {
+ char *l, *p, *e;
+
+ 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 = strappend(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 = strappend(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 from_environment("TMPDIR", "/tmp", ret);
+
+ case SD_PATH_TEMPORARY_LARGE:
+ return from_environment("TMPDIR", "/var/tmp", 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);
+ }
+
+ return -EOPNOTSUPP;
+}
+
+_public_ int sd_path_home(uint64_t type, const char *suffix, char **path) {
+ char *buffer = NULL, *cc;
+ const char *ret;
+ int r;
+
+ assert_return(path, -EINVAL);
+
+ if (IN_SET(type,
+ SD_PATH_SEARCH_BINARIES,
+ SD_PATH_SEARCH_LIBRARY_PRIVATE,
+ SD_PATH_SEARCH_LIBRARY_ARCH,
+ SD_PATH_SEARCH_SHARED,
+ SD_PATH_SEARCH_CONFIGURATION_FACTORY,
+ SD_PATH_SEARCH_STATE_FACTORY,
+ SD_PATH_SEARCH_CONFIGURATION)) {
+
+ _cleanup_strv_free_ char **l = NULL;
+
+ r = sd_path_search(type, suffix, &l);
+ if (r < 0)
+ return r;
+
+ buffer = strv_join(l, ":");
+ if (!buffer)
+ return -ENOMEM;
+
+ *path = buffer;
+ return 0;
+ }
+
+ r = get_path(type, &buffer, &ret);
+ if (r < 0)
+ return r;
+
+ if (!suffix) {
+ if (!buffer) {
+ buffer = strdup(ret);
+ if (!buffer)
+ return -ENOMEM;
+ }
+
+ *path = buffer;
+ return 0;
+ }
+
+ suffix += strspn(suffix, "/");
+
+ if (endswith(ret, "/"))
+ cc = strappend(ret, suffix);
+ else
+ cc = strjoin(ret, "/", suffix, NULL);
+
+ free(buffer);
+
+ if (!cc)
+ return -ENOMEM;
+
+ *path = cc;
+ 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, ...) {
+
+ const char *e;
+ char *h = NULL;
+ char **l = 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 = 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) {
+ strv_free(l);
+ return -ENOMEM;
+ }
+ }
+ }
+
+ if (!h && home_suffix) {
+ e = secure_getenv("HOME");
+ if (e && path_is_absolute(e)) {
+ if (endswith(e, "/"))
+ h = strappend(e, home_suffix);
+ else
+ h = strjoin(e, "/", home_suffix, NULL);
+
+ if (!h) {
+ strv_free(l);
+ return -ENOMEM;
+ }
+ }
+ }
+
+ if (h) {
+ r = strv_consume_prepend(&l, h);
+ if (r < 0) {
+ strv_free(l);
+ return -ENOMEM;
+ }
+ }
+
+ *list = l;
+ return 0;
+}
+
+static int get_search(uint64_t type, char ***list) {
+
+ assert(list);
+
+ switch(type) {
+
+ case SD_PATH_SEARCH_BINARIES:
+ return search_from_environment(list,
+ NULL,
+ ".local/bin",
+ "PATH",
+ true,
+ "/usr/local/sbin",
+ "/usr/local/bin",
+ "/usr/sbin",
+ "/usr/bin",
+#ifdef HAVE_SPLIT_USR
+ "/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",
+#ifdef 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,
+#ifdef 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);
+ }
+
+ return -EOPNOTSUPP;
+}
+
+_public_ int sd_path_search(uint64_t type, const char *suffix, char ***paths) {
+ char **l, **i, **j, **n;
+ int r;
+
+ assert_return(paths, -EINVAL);
+
+ if (!IN_SET(type,
+ SD_PATH_SEARCH_BINARIES,
+ SD_PATH_SEARCH_LIBRARY_PRIVATE,
+ SD_PATH_SEARCH_LIBRARY_ARCH,
+ SD_PATH_SEARCH_SHARED,
+ SD_PATH_SEARCH_CONFIGURATION_FACTORY,
+ SD_PATH_SEARCH_STATE_FACTORY,
+ SD_PATH_SEARCH_CONFIGURATION)) {
+
+ char *p;
+
+ r = sd_path_home(type, suffix, &p);
+ if (r < 0)
+ return r;
+
+ l = new(char*, 2);
+ if (!l) {
+ free(p);
+ return -ENOMEM;
+ }
+
+ l[0] = p;
+ l[1] = NULL;
+
+ *paths = l;
+ return 0;
+ }
+
+ r = get_search(type, &l);
+ if (r < 0)
+ return r;
+
+ if (!suffix) {
+ *paths = l;
+ return 0;
+ }
+
+ n = new(char*, strv_length(l)+1);
+ if (!n) {
+ strv_free(l);
+ return -ENOMEM;
+ }
+
+ j = n;
+ STRV_FOREACH(i, l) {
+
+ if (endswith(*i, "/"))
+ *j = strappend(*i, suffix);
+ else
+ *j = strjoin(*i, "/", suffix, NULL);
+
+ if (!*j) {
+ strv_free(l);
+ strv_free(n);
+ return -ENOMEM;
+ }
+
+ j++;
+ }
+
+ *j = NULL;
+ *paths = n;
+ return 0;
+}
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