From f33d3ec1d7521c91da8b30ad5cb345d6416bb07d Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Thu, 12 Apr 2012 01:51:49 +0200 Subject: move more common files to shared/ and add them to shared.la --- src/shared/path-lookup.c | 348 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 348 insertions(+) create mode 100644 src/shared/path-lookup.c (limited to 'src/shared/path-lookup.c') diff --git a/src/shared/path-lookup.c b/src/shared/path-lookup.c new file mode 100644 index 0000000000..1d95f7d1f8 --- /dev/null +++ b/src/shared/path-lookup.c @@ -0,0 +1,348 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + 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 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 . +***/ + +#include +#include +#include +#include +#include + +#include "util.h" +#include "mkdir.h" +#include "strv.h" + +#include "path-lookup.h" + +int user_config_home(char **config_home) { + const char *e; + + if ((e = getenv("XDG_CONFIG_HOME"))) { + if (asprintf(config_home, "%s/systemd/user", e) < 0) + return -ENOMEM; + + return 1; + } else { + const char *home; + + if ((home = getenv("HOME"))) { + if (asprintf(config_home, "%s/.config/systemd/user", home) < 0) + return -ENOMEM; + + return 1; + } + } + + return 0; +} + +static char** user_dirs(void) { + const char * const config_unit_paths[] = { + USER_CONFIG_UNIT_PATH, + "/etc/systemd/user", + "/run/systemd/user", + NULL + }; + + const char * const data_unit_paths[] = { + "/usr/local/lib/systemd/user", + "/usr/local/share/systemd/user", + USER_DATA_UNIT_PATH, + "/usr/lib/systemd/user", + "/usr/share/systemd/user", + NULL + }; + + 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 (user_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/user", e) < 0) + goto fail; + + } else if (home) { + if (asprintf(&data_home, "%s/.local/share/systemd/user", 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/user", 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 (!strv_isempty(config_dirs)) { + if (!(t = strv_merge_concat(r, config_dirs, "/systemd/user"))) + goto finish; + strv_free(r); + r = t; + } + + if (!(t = strv_merge(r, (char**) config_unit_paths))) + 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 (!strv_isempty(data_dirs)) { + if (!(t = strv_merge_concat(r, data_dirs, "/systemd/user"))) + goto fail; + strv_free(r); + r = t; + } + + if (!(t = strv_merge(r, (char**) data_unit_paths))) + 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, bool personal) { + 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_USER) { + + if (personal) + p->unit_path = user_dirs(); + else + p->unit_path = strv_new( + /* If you modify this you also want to modify + * systemduserunitpath= in systemd.pc.in, and + * the arrays in user_dirs() above! */ + USER_CONFIG_UNIT_PATH, + "/etc/systemd/user", + "/run/systemd/user", + "/usr/local/lib/systemd/user", + "/usr/local/share/systemd/user", + USER_DATA_UNIT_PATH, + "/usr/lib/systemd/user", + "/usr/share/systemd/user", + NULL); + + if (!p->unit_path) + return -ENOMEM; + + } else + if (!(p->unit_path = strv_new( + /* If you modify this you also want to modify + * systemdsystemunitpath= in systemd.pc.in! */ + SYSTEM_CONFIG_UNIT_PATH, + "/etc/systemd/system", + "/run/systemd/system", + "/usr/local/lib/systemd/system", + SYSTEM_DATA_UNIT_PATH, + "/usr/lib/systemd/system", +#ifdef HAVE_SPLIT_USR + "/lib/systemd/system", +#endif + NULL))) + return -ENOMEM; + } + + if (p->unit_path) + if (!strv_path_canonicalize(p->unit_path)) + return -ENOMEM; + + strv_uniq(p->unit_path); + strv_path_remove_empty(p->unit_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 (running_as == MANAGER_SYSTEM) { +#ifdef HAVE_SYSV_COMPAT + /* /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->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->sysvinit_path); + strv_uniq(p->sysvrcnd_path); + + strv_path_remove_empty(p->sysvinit_path); + strv_path_remove_empty(p->sysvrcnd_path); + + 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; + } +#else + log_debug("Disabled SysV init scripts and rcN.d links support"); +#endif + } + + return 0; +} + +void lookup_paths_free(LookupPaths *p) { + assert(p); + + strv_free(p->unit_path); + p->unit_path = NULL; + +#ifdef HAVE_SYSV_COMPAT + strv_free(p->sysvinit_path); + strv_free(p->sysvrcnd_path); + p->sysvinit_path = p->sysvrcnd_path = NULL; +#endif +} -- cgit v1.2.3-54-g00ecf