692 lines
20 KiB
C
692 lines
20 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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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 "path-lookup.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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cc = path_join(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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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 = path_join(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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for (;;) {
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_cleanup_free_ char *line = NULL;
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char *l, *p, *e;
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r = read_line(f, LONG_LINE_MAX, &line);
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if (r < 0)
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return r;
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if (r == 0)
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break;
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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 = path_join(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 = path_join(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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case SD_PATH_SYSTEMD_UTIL:
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*ret = ROOTPREFIX_NOSLASH "/lib/systemd";
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return 0;
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case SD_PATH_SYSTEMD_SYSTEM_UNIT:
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*ret = SYSTEM_DATA_UNIT_PATH;
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return 0;
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case SD_PATH_SYSTEMD_SYSTEM_PRESET:
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*ret = ROOTPREFIX_NOSLASH "/lib/systemd/system-preset";
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return 0;
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case SD_PATH_SYSTEMD_USER_UNIT:
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*ret = USER_DATA_UNIT_DIR;
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return 0;
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case SD_PATH_SYSTEMD_USER_PRESET:
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*ret = ROOTPREFIX_NOSLASH "/lib/systemd/user-preset";
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return 0;
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case SD_PATH_SYSTEMD_SYSTEM_CONF:
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*ret = SYSTEM_CONFIG_UNIT_DIR;
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return 0;
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case SD_PATH_SYSTEMD_USER_CONF:
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*ret = USER_CONFIG_UNIT_DIR;
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return 0;
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case SD_PATH_SYSTEMD_SYSTEM_GENERATOR:
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*ret = SYSTEM_GENERATOR_DIR;
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return 0;
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case SD_PATH_SYSTEMD_USER_GENERATOR:
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*ret = USER_GENERATOR_DIR;
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return 0;
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case SD_PATH_SYSTEMD_SLEEP:
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*ret = ROOTPREFIX_NOSLASH "/lib/systemd/system-sleep";
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return 0;
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case SD_PATH_SYSTEMD_SHUTDOWN:
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*ret = ROOTPREFIX_NOSLASH "/lib/systemd/system-shutdown";
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return 0;
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case SD_PATH_TMPFILES:
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*ret = "/usr/lib/tmpfiles.d";
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return 0;
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case SD_PATH_SYSUSERS:
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*ret = ROOTPREFIX_NOSLASH "/lib/sysusers.d";
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return 0;
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case SD_PATH_SYSCTL:
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*ret = ROOTPREFIX_NOSLASH "/lib/sysctl.d";
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return 0;
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case SD_PATH_BINFMT:
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*ret = ROOTPREFIX_NOSLASH "/lib/binfmt.d";
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return 0;
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case SD_PATH_MODULES_LOAD:
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*ret = ROOTPREFIX_NOSLASH "/lib/modules-load.d";
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return 0;
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case SD_PATH_CATALOG:
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*ret = "/usr/lib/systemd/catalog";
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return 0;
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}
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return -EOPNOTSUPP;
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}
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static int get_path_alloc(uint64_t type, const char *suffix, char **path) {
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_cleanup_free_ char *buffer = NULL;
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char *buffer2 = NULL;
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const char *ret;
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int r;
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assert(path);
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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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suffix += strspn(suffix, "/");
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buffer2 = path_join(ret, suffix);
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if (!buffer2)
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return -ENOMEM;
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} else 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 = buffer2 ?: TAKE_PTR(buffer);
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return 0;
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}
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_public_ int sd_path_lookup(uint64_t type, const char *suffix, char **path) {
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int r;
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assert_return(path, -EINVAL);
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r = get_path_alloc(type, suffix, path);
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if (r != -EOPNOTSUPP)
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return r;
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/* Fall back to sd_path_lookup_strv */
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_cleanup_strv_free_ char **l = NULL;
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char *buffer;
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r = sd_path_lookup_strv(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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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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_cleanup_strv_free_ char **l = NULL;
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const char *e;
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char *h = 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 = TAKE_PTR(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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return -ENOMEM;
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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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h = path_join(e, home_suffix);
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if (!h)
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return -ENOMEM;
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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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return -ENOMEM;
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}
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*list = TAKE_PTR(l);
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return 0;
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}
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#if HAVE_SPLIT_BIN
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# define ARRAY_SBIN_BIN(x) x "sbin", x "bin"
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#else
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# define ARRAY_SBIN_BIN(x) x "bin"
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#endif
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static int get_search(uint64_t type, char ***list) {
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int r;
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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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ARRAY_SBIN_BIN("/usr/local/"),
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ARRAY_SBIN_BIN("/usr/"),
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#if HAVE_SPLIT_USR
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ARRAY_SBIN_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,
|
|
"/etc",
|
|
NULL);
|
|
|
|
case SD_PATH_SEARCH_BINARIES_DEFAULT:
|
|
return strv_from_nulstr(list, DEFAULT_PATH_NULSTR);
|
|
|
|
case SD_PATH_SYSTEMD_SEARCH_SYSTEM_UNIT:
|
|
case SD_PATH_SYSTEMD_SEARCH_USER_UNIT: {
|
|
_cleanup_(lookup_paths_free) LookupPaths lp = {};
|
|
const UnitFileScope scope = type == SD_PATH_SYSTEMD_SEARCH_SYSTEM_UNIT ?
|
|
UNIT_FILE_SYSTEM : UNIT_FILE_USER;
|
|
|
|
r = lookup_paths_init(&lp, scope, 0, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
*list = TAKE_PTR(lp.search_path);
|
|
return 0;
|
|
}
|
|
|
|
case SD_PATH_SYSTEMD_SEARCH_SYSTEM_GENERATOR:
|
|
case SD_PATH_SYSTEMD_SEARCH_USER_GENERATOR: {
|
|
char **t;
|
|
const UnitFileScope scope = type == SD_PATH_SYSTEMD_SEARCH_SYSTEM_GENERATOR ?
|
|
UNIT_FILE_SYSTEM : UNIT_FILE_USER;
|
|
|
|
t = generator_binary_paths(scope);
|
|
if (!t)
|
|
return -ENOMEM;
|
|
|
|
*list = t;
|
|
return 0;
|
|
}
|
|
|
|
case SD_PATH_SYSTEMD_SEARCH_NETWORK:
|
|
return strv_from_nulstr(list, NETWORK_DIRS_NULSTR);
|
|
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
_public_ int sd_path_lookup_strv(uint64_t type, const char *suffix, char ***paths) {
|
|
_cleanup_strv_free_ char **l = NULL, **n = NULL;
|
|
int r;
|
|
|
|
assert_return(paths, -EINVAL);
|
|
|
|
r = get_search(type, &l);
|
|
if (r == -EOPNOTSUPP) {
|
|
_cleanup_free_ char *t = NULL;
|
|
|
|
r = get_path_alloc(type, suffix, &t);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
l = new(char*, 2);
|
|
if (!l)
|
|
return -ENOMEM;
|
|
l[0] = TAKE_PTR(t);
|
|
l[1] = NULL;
|
|
|
|
*paths = TAKE_PTR(l);
|
|
return 0;
|
|
|
|
} else if (r < 0)
|
|
return r;
|
|
|
|
if (!suffix) {
|
|
*paths = TAKE_PTR(l);
|
|
return 0;
|
|
}
|
|
|
|
n = new(char*, strv_length(l)+1);
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
char **i, **j = n;
|
|
STRV_FOREACH(i, l) {
|
|
*j = path_join(*i, suffix);
|
|
if (!*j)
|
|
return -ENOMEM;
|
|
|
|
j++;
|
|
}
|
|
*j = NULL;
|
|
|
|
*paths = TAKE_PTR(n);
|
|
return 0;
|
|
}
|