gri3-wm/libi3/get_config_path.c

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/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
*
*/
#include "libi3.h"
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
/*
* Checks if the given path exists by calling stat().
*
*/
static bool path_exists(const char *path) {
struct stat buf;
return (stat(path, &buf) == 0);
}
/*
* Get the path of the first configuration file found. If override_configpath is
* specified, that path is returned and saved for further calls. Otherwise,
* checks the home directory first, then the system directory, always taking
* into account the XDG Base Directory Specification ($XDG_CONFIG_HOME,
* $XDG_CONFIG_DIRS).
*
*/
char *get_config_path(const char *override_configpath, bool use_system_paths) {
char *xdg_config_home, *xdg_config_dirs, *config_path;
static const char *saved_configpath = NULL;
if (override_configpath != NULL) {
saved_configpath = override_configpath;
return sstrdup(saved_configpath);
}
if (saved_configpath != NULL) {
return sstrdup(saved_configpath);
}
/* 1: check for $XDG_CONFIG_HOME/i3/config */
if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL) {
xdg_config_home = "~/.config.scm";
}
xdg_config_home = resolve_tilde(xdg_config_home);
sasprintf(&config_path, "%s/i3/config.scm", xdg_config_home);
free(xdg_config_home);
if (path_exists(config_path)) {
return config_path;
}
free(config_path);
/* 2: check the traditional path under the home directory */
config_path = resolve_tilde("~/.i3/config.scm");
if (path_exists(config_path)) {
return config_path;
}
free(config_path);
/* The below paths are considered system-level, and can be skipped if the
* caller only wants user-level configs. */
if (!use_system_paths) {
return NULL;
}
/* 3: check for $XDG_CONFIG_DIRS/i3/config */
if ((xdg_config_dirs = getenv("XDG_CONFIG_DIRS")) == NULL) {
xdg_config_dirs = SYSCONFDIR "/xdg";
}
char *buf = sstrdup(xdg_config_dirs);
char *tok = strtok(buf, ":");
while (tok != NULL) {
tok = resolve_tilde(tok);
sasprintf(&config_path, "%s/i3/config.scm", tok);
free(tok);
if (path_exists(config_path)) {
free(buf);
return config_path;
}
free(config_path);
tok = strtok(NULL, ":");
}
free(buf);
/* 4: check the traditional path under /etc */
config_path = SYSCONFDIR "/i3/config.scm";
if (path_exists(config_path)) {
return sstrdup(config_path);
}
return NULL;
}