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|
/***
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/sd-path.h>
#include "alloc-util.h"
#include "architecture.h"
#include "fd-util.h"
#include "fileio.h"
#include "missing.h"
#include "path-util.h"
#include "string-util.h"
#include "strv.h"
#include "user-util.h"
#include "util.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;
}
|