sd_path_lookup, sd_path_lookup_strv - Query well-known file system paths

sd_path_lookup() and sd_bus_path_lookup_strv() return a single path or set of file system paths specified by the argument type. In case of sd_path_lookup() a single NUL-terminated string is returned. When type specifies a set of paths, they are concatenated using ":" as a separator (as is traditionally done for e.g. $PATH or $LD_LIBRARY_PATH). In case of sd_path_lookup_strv() a NULL-terminated array of strings is returned (strv). If suffix suffix is given, it is concatenated to each of the paths after a slash ("/"). All returned paths are absolute. For paths which refer to user directories, the relevant XDG standard is followed, with support for environment variables like $XDG_DOCUMENTS_DIR, $XDG_DESKTOP_DIR, ..., and explicit configuration in /etc/xdg/user-dirs.conf or ${XDG_CONFIG_HOME}/user-dirs.dirs. See XDGBaseDirectorySpecification[1] for details. systemd-path(1) is a wrapper around sd_path_lookup() and allows the same set of paths to be queried.

Lookupthelocationof~/Documents /* SPDX-License-Identifier: MIT-0 */ #include <stdio.h> #include <stdlib.h> #include <systemd/sd-path.h> int main(void) { int r; char *t; r = sd_path_lookup(SD_PATH_USER_DOCUMENTS, NULL, &t); if (r < 0) return EXIT_FAILURE; printf("~/Documents: %s\n", t); free(t); return EXIT_SUCCESS; } Note that the default answer of $HOME/Documents may be overridden by user-dirs.conf or $XDG_DOCUMENTS_DIR.

sd_path_lookup() and sd_path_lookup_strv() were added in version 246.

sd_path_lookup, sd_path_lookup_strv - Query well-known file system paths

1. XDG Base Directory Specification https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html systemd 257.7 SD_PATH_LOOKUP(3)

On success, sd_path_lookup() and sd_path_lookup_strv() return a non-negative integer. On failure, a negative errno-style error number is returned by either function. The returned string or string array (strv) must be free(3)'d by the caller. Errors Returned errors may indicate the following problems: -EOPNOTSUPP Unknown identifier type. Added in version 246. -EINVAL Output argument is NULL. Added in version 246. -ENXIO Query failed because of an undefined environment variable (e.g. for SD_PATH_USER_RUNTIME when $XDG_RUNTIME_DIR is not defined). Added in version 246. -ENOMEM Memory allocation failed. Added in version 246.

systemd(1), sd-path(3), systemd-path(1)

#include<systemd/sd-path.h>enum{SD_PATH_TEMPORARY, SD_PATH_TEMPORARY_LARGE, SD_PATH_SYSTEM_BINARIES, SD_PATH_SYSTEM_INCLUDE, SD_PATH_SYSTEM_LIBRARY_PRIVATE, SD_PATH_SYSTEM_LIBRARY_ARCH, SD_PATH_SYSTEM_SHARED, SD_PATH_SYSTEM_CONFIGURATION_FACTORY, SD_PATH_SYSTEM_STATE_FACTORY, SD_PATH_SYSTEM_CONFIGURATION, SD_PATH_SYSTEM_RUNTIME, SD_PATH_SYSTEM_RUNTIME_LOGS, SD_PATH_SYSTEM_STATE_PRIVATE, SD_PATH_SYSTEM_STATE_LOGS, SD_PATH_SYSTEM_STATE_CACHE, SD_PATH_SYSTEM_STATE_SPOOL, SD_PATH_USER_BINARIES, SD_PATH_USER_LIBRARY_PRIVATE, SD_PATH_USER_LIBRARY_ARCH, SD_PATH_USER_SHARED, SD_PATH_USER_CONFIGURATION, SD_PATH_USER_RUNTIME, SD_PATH_USER_STATE_PRIVATE, SD_PATH_USER_STATE_CACHE, SD_PATH_USER, SD_PATH_USER_DOCUMENTS, SD_PATH_USER_MUSIC, SD_PATH_USER_PICTURES, SD_PATH_USER_VIDEOS, SD_PATH_USER_DOWNLOAD, SD_PATH_USER_PUBLIC, SD_PATH_USER_TEMPLATES, SD_PATH_USER_DESKTOP, SD_PATH_SEARCH_BINARIES, SD_PATH_SEARCH_BINARIES_DEFAULT, 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, SD_PATH_SYSTEMD_UTIL, SD_PATH_SYSTEMD_SYSTEM_UNIT, SD_PATH_SYSTEMD_SYSTEM_PRESET, SD_PATH_SYSTEMD_USER_UNIT, SD_PATH_SYSTEMD_USER_PRESET, SD_PATH_SYSTEMD_SYSTEM_CONF, SD_PATH_SYSTEMD_USER_CONF, SD_PATH_SYSTEMD_SEARCH_SYSTEM_UNIT, SD_PATH_SYSTEMD_SEARCH_USER_UNIT, SD_PATH_SYSTEMD_SYSTEM_GENERATOR, SD_PATH_SYSTEMD_USER_GENERATOR, SD_PATH_SYSTEMD_SEARCH_SYSTEM_GENERATOR, SD_PATH_SYSTEMD_SEARCH_USER_GENERATOR, SD_PATH_SYSTEMD_SLEEP, SD_PATH_SYSTEMD_SHUTDOWN, SD_PATH_TMPFILES, SD_PATH_SYSUSERS, SD_PATH_SYSCTL, SD_PATH_BINFMT, SD_PATH_MODULES_LOAD, SD_PATH_CATALOG, SD_PATH_SYSTEMD_SEARCH_NETWORK, SD_PATH_SYSTEMD_SYSTEM_ENVIRONMENT_GENERATOR, SD_PATH_SYSTEMD_USER_ENVIRONMENT_GENERATOR, SD_PATH_SYSTEMD_SEARCH_SYSTEM_ENVIRONMENT_GENERATOR, SD_PATH_SYSTEMD_SEARCH_USER_ENVIRONMENT_GENERATOR, }; intsd_path_lookup(uint64_ttype,constchar*suffix,char**paths);intsd_path_lookup_strv(uint64_ttype,constchar*suffix,char***paths);