640 lines
18 KiB
C
640 lines
18 KiB
C
/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "sd-path.h"
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#include "alloc-util.h"
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#include "architecture.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "fs-util.h"
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#include "missing.h"
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#include "path-util.h"
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#include "string-util.h"
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#include "strv.h"
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#include "user-util.h"
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#include "util.h"
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static int from_environment(const char *envname, const char *fallback, const char **ret) {
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assert(ret);
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if (envname) {
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const char *e;
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e = secure_getenv(envname);
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if (e && path_is_absolute(e)) {
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*ret = e;
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return 0;
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}
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}
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if (fallback) {
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*ret = fallback;
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return 0;
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}
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return -ENXIO;
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}
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static int from_home_dir(const char *envname, const char *suffix, char **buffer, const char **ret) {
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_cleanup_free_ char *h = NULL;
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char *cc = NULL;
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int r;
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assert(suffix);
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assert(buffer);
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assert(ret);
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if (envname) {
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const char *e = NULL;
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e = secure_getenv(envname);
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if (e && path_is_absolute(e)) {
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*ret = e;
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return 0;
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}
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}
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r = get_home_dir(&h);
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if (r < 0)
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return r;
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if (endswith(h, "/"))
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cc = strappend(h, suffix);
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else
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cc = strjoin(h, "/", suffix);
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if (!cc)
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return -ENOMEM;
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*buffer = cc;
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*ret = cc;
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return 0;
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}
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static int from_user_dir(const char *field, char **buffer, const char **ret) {
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_cleanup_fclose_ FILE *f = NULL;
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_cleanup_free_ char *b = NULL;
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_cleanup_free_ const char *fn = NULL;
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const char *c = NULL;
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char line[LINE_MAX];
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size_t n;
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int r;
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assert(field);
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assert(buffer);
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assert(ret);
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r = from_home_dir("XDG_CONFIG_HOME", ".config", &b, &c);
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if (r < 0)
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return r;
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fn = strappend(c, "/user-dirs.dirs");
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if (!fn)
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return -ENOMEM;
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f = fopen(fn, "re");
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if (!f) {
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if (errno == ENOENT)
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goto fallback;
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return -errno;
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}
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/* This is an awful parse, but it follows closely what
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* xdg-user-dirs does upstream */
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n = strlen(field);
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FOREACH_LINE(line, f, return -errno) {
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char *l, *p, *e;
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l = strstrip(line);
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if (!strneq(l, field, n))
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continue;
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p = l + n;
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p += strspn(p, WHITESPACE);
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if (*p != '=')
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continue;
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p++;
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p += strspn(p, WHITESPACE);
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if (*p != '"')
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continue;
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p++;
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e = strrchr(p, '"');
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if (!e)
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continue;
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*e = 0;
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/* Three syntaxes permitted: relative to $HOME, $HOME itself, and absolute path */
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if (startswith(p, "$HOME/")) {
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_cleanup_free_ char *h = NULL;
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char *cc;
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r = get_home_dir(&h);
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if (r < 0)
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return r;
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cc = strappend(h, p+5);
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if (!cc)
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return -ENOMEM;
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*buffer = cc;
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*ret = cc;
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return 0;
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} else if (streq(p, "$HOME")) {
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r = get_home_dir(buffer);
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if (r < 0)
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return r;
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*ret = *buffer;
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return 0;
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} else if (path_is_absolute(p)) {
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char *copy;
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copy = strdup(p);
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if (!copy)
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return -ENOMEM;
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*buffer = copy;
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*ret = copy;
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return 0;
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}
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}
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fallback:
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/* The desktop directory defaults to $HOME/Desktop, the others to $HOME */
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if (streq(field, "XDG_DESKTOP_DIR")) {
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_cleanup_free_ char *h = NULL;
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char *cc;
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r = get_home_dir(&h);
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if (r < 0)
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return r;
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cc = strappend(h, "/Desktop");
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if (!cc)
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return -ENOMEM;
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*buffer = cc;
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*ret = cc;
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} else {
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r = get_home_dir(buffer);
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if (r < 0)
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return r;
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*ret = *buffer;
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}
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return 0;
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}
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static int get_path(uint64_t type, char **buffer, const char **ret) {
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int r;
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assert(buffer);
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assert(ret);
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switch (type) {
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case SD_PATH_TEMPORARY:
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return tmp_dir(ret);
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case SD_PATH_TEMPORARY_LARGE:
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return var_tmp_dir(ret);
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case SD_PATH_SYSTEM_BINARIES:
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*ret = "/usr/bin";
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return 0;
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case SD_PATH_SYSTEM_INCLUDE:
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*ret = "/usr/include";
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return 0;
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case SD_PATH_SYSTEM_LIBRARY_PRIVATE:
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*ret = "/usr/lib";
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return 0;
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case SD_PATH_SYSTEM_LIBRARY_ARCH:
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*ret = LIBDIR;
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return 0;
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case SD_PATH_SYSTEM_SHARED:
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*ret = "/usr/share";
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return 0;
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case SD_PATH_SYSTEM_CONFIGURATION_FACTORY:
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*ret = "/usr/share/factory/etc";
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return 0;
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case SD_PATH_SYSTEM_STATE_FACTORY:
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*ret = "/usr/share/factory/var";
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return 0;
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case SD_PATH_SYSTEM_CONFIGURATION:
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*ret = "/etc";
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return 0;
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case SD_PATH_SYSTEM_RUNTIME:
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*ret = "/run";
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return 0;
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case SD_PATH_SYSTEM_RUNTIME_LOGS:
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*ret = "/run/log";
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return 0;
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case SD_PATH_SYSTEM_STATE_PRIVATE:
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*ret = "/var/lib";
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return 0;
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case SD_PATH_SYSTEM_STATE_LOGS:
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*ret = "/var/log";
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return 0;
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case SD_PATH_SYSTEM_STATE_CACHE:
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*ret = "/var/cache";
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return 0;
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case SD_PATH_SYSTEM_STATE_SPOOL:
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*ret = "/var/spool";
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return 0;
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case SD_PATH_USER_BINARIES:
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return from_home_dir(NULL, ".local/bin", buffer, ret);
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case SD_PATH_USER_LIBRARY_PRIVATE:
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return from_home_dir(NULL, ".local/lib", buffer, ret);
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case SD_PATH_USER_LIBRARY_ARCH:
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return from_home_dir(NULL, ".local/lib/" LIB_ARCH_TUPLE, buffer, ret);
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case SD_PATH_USER_SHARED:
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return from_home_dir("XDG_DATA_HOME", ".local/share", buffer, ret);
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case SD_PATH_USER_CONFIGURATION:
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return from_home_dir("XDG_CONFIG_HOME", ".config", buffer, ret);
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case SD_PATH_USER_RUNTIME:
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return from_environment("XDG_RUNTIME_DIR", NULL, ret);
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case SD_PATH_USER_STATE_CACHE:
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return from_home_dir("XDG_CACHE_HOME", ".cache", buffer, ret);
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case SD_PATH_USER:
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r = get_home_dir(buffer);
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if (r < 0)
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return r;
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*ret = *buffer;
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return 0;
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case SD_PATH_USER_DOCUMENTS:
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return from_user_dir("XDG_DOCUMENTS_DIR", buffer, ret);
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case SD_PATH_USER_MUSIC:
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return from_user_dir("XDG_MUSIC_DIR", buffer, ret);
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case SD_PATH_USER_PICTURES:
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return from_user_dir("XDG_PICTURES_DIR", buffer, ret);
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case SD_PATH_USER_VIDEOS:
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return from_user_dir("XDG_VIDEOS_DIR", buffer, ret);
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case SD_PATH_USER_DOWNLOAD:
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return from_user_dir("XDG_DOWNLOAD_DIR", buffer, ret);
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case SD_PATH_USER_PUBLIC:
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return from_user_dir("XDG_PUBLICSHARE_DIR", buffer, ret);
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case SD_PATH_USER_TEMPLATES:
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return from_user_dir("XDG_TEMPLATES_DIR", buffer, ret);
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case SD_PATH_USER_DESKTOP:
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return from_user_dir("XDG_DESKTOP_DIR", buffer, ret);
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}
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return -EOPNOTSUPP;
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}
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_public_ int sd_path_home(uint64_t type, const char *suffix, char **path) {
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char *buffer = NULL, *cc;
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const char *ret;
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int r;
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assert_return(path, -EINVAL);
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if (IN_SET(type,
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SD_PATH_SEARCH_BINARIES,
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SD_PATH_SEARCH_LIBRARY_PRIVATE,
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SD_PATH_SEARCH_LIBRARY_ARCH,
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SD_PATH_SEARCH_SHARED,
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SD_PATH_SEARCH_CONFIGURATION_FACTORY,
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SD_PATH_SEARCH_STATE_FACTORY,
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SD_PATH_SEARCH_CONFIGURATION)) {
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_cleanup_strv_free_ char **l = NULL;
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r = sd_path_search(type, suffix, &l);
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if (r < 0)
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return r;
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buffer = strv_join(l, ":");
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if (!buffer)
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return -ENOMEM;
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*path = buffer;
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return 0;
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}
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r = get_path(type, &buffer, &ret);
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if (r < 0)
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return r;
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if (!suffix) {
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if (!buffer) {
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buffer = strdup(ret);
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if (!buffer)
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return -ENOMEM;
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}
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*path = buffer;
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return 0;
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}
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suffix += strspn(suffix, "/");
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if (endswith(ret, "/"))
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cc = strappend(ret, suffix);
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else
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cc = strjoin(ret, "/", suffix);
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free(buffer);
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if (!cc)
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return -ENOMEM;
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*path = cc;
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return 0;
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}
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static int search_from_environment(
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char ***list,
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const char *env_home,
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const char *home_suffix,
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const char *env_search,
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bool env_search_sufficient,
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const char *first, ...) {
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const char *e;
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char *h = NULL;
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char **l = NULL;
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int r;
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assert(list);
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if (env_search) {
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e = secure_getenv(env_search);
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if (e) {
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l = strv_split(e, ":");
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if (!l)
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return -ENOMEM;
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if (env_search_sufficient) {
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*list = l;
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return 0;
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}
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}
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}
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if (!l && first) {
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va_list ap;
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va_start(ap, first);
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l = strv_new_ap(first, ap);
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va_end(ap);
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if (!l)
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return -ENOMEM;
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}
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if (env_home) {
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e = secure_getenv(env_home);
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if (e && path_is_absolute(e)) {
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h = strdup(e);
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if (!h) {
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strv_free(l);
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return -ENOMEM;
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}
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}
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}
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if (!h && home_suffix) {
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e = secure_getenv("HOME");
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if (e && path_is_absolute(e)) {
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if (endswith(e, "/"))
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h = strappend(e, home_suffix);
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else
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h = strjoin(e, "/", home_suffix);
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if (!h) {
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strv_free(l);
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return -ENOMEM;
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}
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}
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}
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if (h) {
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r = strv_consume_prepend(&l, h);
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if (r < 0) {
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strv_free(l);
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return -ENOMEM;
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}
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}
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*list = l;
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return 0;
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}
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static int get_search(uint64_t type, char ***list) {
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assert(list);
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switch(type) {
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case SD_PATH_SEARCH_BINARIES:
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return search_from_environment(list,
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NULL,
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".local/bin",
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"PATH",
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true,
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"/usr/local/sbin",
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"/usr/local/bin",
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"/usr/sbin",
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"/usr/bin",
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#if HAVE_SPLIT_USR
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"/sbin",
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"/bin",
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#endif
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NULL);
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case SD_PATH_SEARCH_LIBRARY_PRIVATE:
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return search_from_environment(list,
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NULL,
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".local/lib",
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NULL,
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false,
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"/usr/local/lib",
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"/usr/lib",
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#if HAVE_SPLIT_USR
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"/lib",
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#endif
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NULL);
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case SD_PATH_SEARCH_LIBRARY_ARCH:
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return search_from_environment(list,
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NULL,
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".local/lib/" LIB_ARCH_TUPLE,
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"LD_LIBRARY_PATH",
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true,
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LIBDIR,
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#if HAVE_SPLIT_USR
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ROOTLIBDIR,
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#endif
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NULL);
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case SD_PATH_SEARCH_SHARED:
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return search_from_environment(list,
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"XDG_DATA_HOME",
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".local/share",
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"XDG_DATA_DIRS",
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false,
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"/usr/local/share",
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"/usr/share",
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NULL);
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case SD_PATH_SEARCH_CONFIGURATION_FACTORY:
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return search_from_environment(list,
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NULL,
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NULL,
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NULL,
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false,
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"/usr/local/share/factory/etc",
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"/usr/share/factory/etc",
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NULL);
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case SD_PATH_SEARCH_STATE_FACTORY:
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return search_from_environment(list,
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NULL,
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NULL,
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NULL,
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false,
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"/usr/local/share/factory/var",
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"/usr/share/factory/var",
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NULL);
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case SD_PATH_SEARCH_CONFIGURATION:
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return search_from_environment(list,
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"XDG_CONFIG_HOME",
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".config",
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"XDG_CONFIG_DIRS",
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false,
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"/etc",
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NULL);
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}
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return -EOPNOTSUPP;
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}
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_public_ int sd_path_search(uint64_t type, const char *suffix, char ***paths) {
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char **l, **i, **j, **n;
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int r;
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assert_return(paths, -EINVAL);
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if (!IN_SET(type,
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SD_PATH_SEARCH_BINARIES,
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SD_PATH_SEARCH_LIBRARY_PRIVATE,
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SD_PATH_SEARCH_LIBRARY_ARCH,
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SD_PATH_SEARCH_SHARED,
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SD_PATH_SEARCH_CONFIGURATION_FACTORY,
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SD_PATH_SEARCH_STATE_FACTORY,
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SD_PATH_SEARCH_CONFIGURATION)) {
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char *p;
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r = sd_path_home(type, suffix, &p);
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if (r < 0)
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return r;
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l = new(char*, 2);
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if (!l) {
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free(p);
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return -ENOMEM;
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}
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l[0] = p;
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l[1] = NULL;
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*paths = l;
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return 0;
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}
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r = get_search(type, &l);
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if (r < 0)
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return r;
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|
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if (!suffix) {
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*paths = l;
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return 0;
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}
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|
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);
|
|
|
|
if (!*j) {
|
|
strv_free(l);
|
|
strv_free(n);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
j++;
|
|
}
|
|
|
|
*j = NULL;
|
|
*paths = n;
|
|
return 0;
|
|
}
|