/*-*- Mode: C; c-basic-offset: 8 -*-*/ /*** 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 General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <assert.h> #include <stdlib.h> #include <stdio.h> #include <unistd.h> #include <errno.h> #include "util.h" #include "strv.h" #include "path-lookup.h" int session_config_home(char **config_home) { const char *e; if ((e = getenv("XDG_CONFIG_HOME"))) { if (asprintf(config_home, "%s/systemd/session", e) < 0) return -ENOMEM; return 1; } else { const char *home; if ((home = getenv("HOME"))) { if (asprintf(config_home, "%s/.config/systemd/session", home) < 0) return -ENOMEM; return 1; } } return 0; } static char** session_dirs(void) { const char *home, *e; char *config_home = NULL, *data_home = NULL; char **config_dirs = NULL, **data_dirs = NULL; char **r = NULL, **t; /* 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. */ if (session_config_home(&config_home) < 0) goto fail; home = getenv("HOME"); if ((e = getenv("XDG_CONFIG_DIRS"))) if (!(config_dirs = strv_split(e, ":"))) goto fail; /* We don't treat /etc/xdg/systemd here as the spec * suggests because we assume that that is a link to * /etc/systemd/ anyway. */ if ((e = getenv("XDG_DATA_HOME"))) { if (asprintf(&data_home, "%s/systemd/session", e) < 0) goto fail; } else if (home) { if (asprintf(&data_home, "%s/.local/share/systemd/session", home) < 0) goto fail; /* There is really no need for two unit dirs in $HOME, * except to be fully compliant with the XDG spec. We * now try to link the two dirs, so that we can * minimize disk seeks a little. Further down we'll * then filter out this link, if it is actually is * one. */ mkdir_parents(data_home, 0777); (void) symlink("../../../.config/systemd/session", data_home); } if ((e = getenv("XDG_DATA_DIRS"))) data_dirs = strv_split(e, ":"); else data_dirs = strv_new("/usr/local/share", "/usr/share", NULL); if (!data_dirs) goto fail; /* Now merge everything we found. */ if (config_home) { if (!(t = strv_append(r, config_home))) goto fail; strv_free(r); r = t; } if (!(t = strv_merge_concat(r, config_dirs, "/systemd/session"))) goto finish; strv_free(r); r = t; if (!(t = strv_append(r, SESSION_CONFIG_UNIT_PATH))) goto fail; strv_free(r); r = t; if (data_home) { if (!(t = strv_append(r, data_home))) goto fail; strv_free(r); r = t; } if (!(t = strv_merge_concat(r, data_dirs, "/systemd/session"))) goto fail; strv_free(r); r = t; if (!(t = strv_append(r, SESSION_DATA_UNIT_PATH))) goto fail; strv_free(r); r = t; if (!strv_path_make_absolute_cwd(r)) goto fail; finish: free(config_home); strv_free(config_dirs); free(data_home); strv_free(data_dirs); return r; fail: strv_free(r); r = NULL; goto finish; } int lookup_paths_init(LookupPaths *p, ManagerRunningAs running_as) { const char *e; char *t; assert(p); /* First priority is whatever has been passed to us via env * vars */ if ((e = getenv("SYSTEMD_UNIT_PATH"))) if (!(p->unit_path = split_path_and_make_absolute(e))) return -ENOMEM; if (strv_isempty(p->unit_path)) { /* Nothing is set, so let's figure something out. */ strv_free(p->unit_path); if (running_as == MANAGER_SESSION) { if (!(p->unit_path = session_dirs())) return -ENOMEM; } else if (!(p->unit_path = strv_new( SYSTEM_CONFIG_UNIT_PATH, "/etc/systemd/system", "/usr/local/share/systemd/system", "/usr/share/systemd/system", "/lib/systemd/system", SYSTEM_DATA_UNIT_PATH, NULL))) return -ENOMEM; } if (running_as == MANAGER_SYSTEM) { /* /etc/init.d/ compatibility does not matter to users */ if ((e = getenv("SYSTEMD_SYSVINIT_PATH"))) if (!(p->sysvinit_path = split_path_and_make_absolute(e))) return -ENOMEM; if (strv_isempty(p->sysvinit_path)) { strv_free(p->sysvinit_path); if (!(p->sysvinit_path = strv_new( SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */ NULL))) return -ENOMEM; } if ((e = getenv("SYSTEMD_SYSVRCND_PATH"))) if (!(p->sysvrcnd_path = split_path_and_make_absolute(e))) return -ENOMEM; if (strv_isempty(p->sysvrcnd_path)) { strv_free(p->sysvrcnd_path); if (!(p->sysvrcnd_path = strv_new( SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */ NULL))) return -ENOMEM; } } if (p->unit_path) if (!strv_path_canonicalize(p->unit_path)) return -ENOMEM; if (p->sysvinit_path) if (!strv_path_canonicalize(p->sysvinit_path)) return -ENOMEM; if (p->sysvrcnd_path) if (!strv_path_canonicalize(p->sysvrcnd_path)) return -ENOMEM; strv_uniq(p->unit_path); strv_uniq(p->sysvinit_path); strv_uniq(p->sysvrcnd_path); if (!strv_isempty(p->unit_path)) { if (!(t = strv_join(p->unit_path, "\n\t"))) return -ENOMEM; log_debug("Looking for unit files in:\n\t%s", t); free(t); } else { log_debug("Ignoring unit files."); strv_free(p->unit_path); p->unit_path = NULL; } if (!strv_isempty(p->sysvinit_path)) { if (!(t = strv_join(p->sysvinit_path, "\n\t"))) return -ENOMEM; log_debug("Looking for SysV init scripts in:\n\t%s", t); free(t); } else { log_debug("Ignoring SysV init scripts."); strv_free(p->sysvinit_path); p->sysvinit_path = NULL; } if (!strv_isempty(p->sysvrcnd_path)) { if (!(t = strv_join(p->sysvrcnd_path, "\n\t"))) return -ENOMEM; log_debug("Looking for SysV rcN.d links in:\n\t%s", t); free(t); } else { log_debug("Ignoring SysV rcN.d links."); strv_free(p->sysvrcnd_path); p->sysvrcnd_path = NULL; } return 0; } void lookup_paths_free(LookupPaths *p) { assert(p); strv_free(p->unit_path); strv_free(p->sysvinit_path); strv_free(p->sysvrcnd_path); p->unit_path = p->sysvinit_path = p->sysvrcnd_path = NULL; }