diff options
Diffstat (limited to 'src/tmpfiles/tmpfiles.c')
| -rw-r--r-- | src/tmpfiles/tmpfiles.c | 1418 |
1 files changed, 0 insertions, 1418 deletions
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c deleted file mode 100644 index c27d0112f9..0000000000 --- a/src/tmpfiles/tmpfiles.c +++ /dev/null @@ -1,1418 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering, Kay Sievers - - 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 <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <string.h> -#include <sys/stat.h> -#include <limits.h> -#include <dirent.h> -#include <grp.h> -#include <pwd.h> -#include <stdio.h> -#include <stdlib.h> -#include <stddef.h> -#include <getopt.h> -#include <stdbool.h> -#include <time.h> -#include <sys/types.h> -#include <sys/param.h> -#include <glob.h> -#include <fnmatch.h> -#include <sys/capability.h> - -#include "log.h" -#include "util.h" -#include "macro.h" -#include "mkdir.h" -#include "path-util.h" -#include "strv.h" -#include "label.h" -#include "set.h" -#include "conf-files.h" -#include "capability.h" - -/* This reads all files listed in /etc/tmpfiles.d/?*.conf and creates - * them in the file system. This is intended to be used to create - * properly owned directories beneath /tmp, /var/tmp, /run, which are - * volatile and hence need to be recreated on bootup. */ - -typedef enum ItemType { - /* These ones take file names */ - CREATE_FILE = 'f', - TRUNCATE_FILE = 'F', - WRITE_FILE = 'w', - CREATE_DIRECTORY = 'd', - TRUNCATE_DIRECTORY = 'D', - CREATE_FIFO = 'p', - CREATE_SYMLINK = 'L', - CREATE_CHAR_DEVICE = 'c', - CREATE_BLOCK_DEVICE = 'b', - - /* These ones take globs */ - IGNORE_PATH = 'x', - REMOVE_PATH = 'r', - RECURSIVE_REMOVE_PATH = 'R', - RELABEL_PATH = 'z', - RECURSIVE_RELABEL_PATH = 'Z' -} ItemType; - -typedef struct Item { - ItemType type; - - char *path; - char *argument; - uid_t uid; - gid_t gid; - mode_t mode; - usec_t age; - - dev_t major_minor; - - bool uid_set:1; - bool gid_set:1; - bool mode_set:1; - bool age_set:1; - - bool keep_first_level:1; -} Item; - -static Hashmap *items = NULL, *globs = NULL; -static Set *unix_sockets = NULL; - -static bool arg_create = false; -static bool arg_clean = false; -static bool arg_remove = false; - -static const char *arg_prefix = NULL; - -static const char * const conf_file_dirs[] = { - "/etc/tmpfiles.d", - "/run/tmpfiles.d", - "/usr/local/lib/tmpfiles.d", - "/usr/lib/tmpfiles.d", -#ifdef HAVE_SPLIT_USR - "/lib/tmpfiles.d", -#endif - NULL -}; - -#define MAX_DEPTH 256 - -static bool needs_glob(ItemType t) { - return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RELABEL_PATH || t == RECURSIVE_RELABEL_PATH; -} - -static struct Item* find_glob(Hashmap *h, const char *match) { - Item *j; - Iterator i; - - HASHMAP_FOREACH(j, h, i) - if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0) - return j; - - return NULL; -} - -static void load_unix_sockets(void) { - FILE *f = NULL; - char line[LINE_MAX]; - - if (unix_sockets) - return; - - /* We maintain a cache of the sockets we found in - * /proc/net/unix to speed things up a little. */ - - unix_sockets = set_new(string_hash_func, string_compare_func); - if (!unix_sockets) - return; - - f = fopen("/proc/net/unix", "re"); - if (!f) - return; - - /* Skip header */ - if (!fgets(line, sizeof(line), f)) - goto fail; - - for (;;) { - char *p, *s; - int k; - - if (!fgets(line, sizeof(line), f)) - break; - - truncate_nl(line); - - p = strchr(line, ':'); - if (!p) - continue; - - if (strlen(p) < 37) - continue; - - p += 37; - p += strspn(p, WHITESPACE); - p += strcspn(p, WHITESPACE); /* skip one more word */ - p += strspn(p, WHITESPACE); - - if (*p != '/') - continue; - - s = strdup(p); - if (!s) - goto fail; - - path_kill_slashes(s); - - k = set_put(unix_sockets, s); - if (k < 0) { - free(s); - - if (k != -EEXIST) - goto fail; - } - } - - fclose(f); - return; - -fail: - set_free_free(unix_sockets); - unix_sockets = NULL; - - if (f) - fclose(f); -} - -static bool unix_socket_alive(const char *fn) { - assert(fn); - - load_unix_sockets(); - - if (unix_sockets) - return !!set_get(unix_sockets, (char*) fn); - - /* We don't know, so assume yes */ - return true; -} - -static int dir_cleanup( - const char *p, - DIR *d, - const struct stat *ds, - usec_t cutoff, - dev_t rootdev, - bool mountpoint, - int maxdepth, - bool keep_this_level) -{ - struct dirent *dent; - struct timespec times[2]; - bool deleted = false; - char *sub_path = NULL; - int r = 0; - - while ((dent = readdir(d))) { - struct stat s; - usec_t age; - - if (streq(dent->d_name, ".") || - streq(dent->d_name, "..")) - continue; - - if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) { - - if (errno != ENOENT) { - log_error("stat(%s/%s) failed: %m", p, dent->d_name); - r = -errno; - } - - continue; - } - - /* Stay on the same filesystem */ - if (s.st_dev != rootdev) - continue; - - /* Do not delete read-only files owned by root */ - if (s.st_uid == 0 && !(s.st_mode & S_IWUSR)) - continue; - - free(sub_path); - sub_path = NULL; - - if (asprintf(&sub_path, "%s/%s", p, dent->d_name) < 0) { - r = log_oom(); - goto finish; - } - - /* Is there an item configured for this path? */ - if (hashmap_get(items, sub_path)) - continue; - - if (find_glob(globs, sub_path)) - continue; - - if (S_ISDIR(s.st_mode)) { - - if (mountpoint && - streq(dent->d_name, "lost+found") && - s.st_uid == 0) - continue; - - if (maxdepth <= 0) - log_warning("Reached max depth on %s.", sub_path); - else { - DIR *sub_dir; - int q; - - sub_dir = xopendirat(dirfd(d), dent->d_name, O_NOFOLLOW|O_NOATIME); - if (sub_dir == NULL) { - if (errno != ENOENT) { - log_error("opendir(%s/%s) failed: %m", p, dent->d_name); - r = -errno; - } - - continue; - } - - q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false); - closedir(sub_dir); - - if (q < 0) - r = q; - } - - /* Note: if you are wondering why we don't - * support the sticky bit for excluding - * directories from cleaning like we do it for - * other file system objects: well, the sticky - * bit already has a meaning for directories, - * so we don't want to overload that. */ - - if (keep_this_level) - continue; - - /* Ignore ctime, we change it when deleting */ - age = MAX(timespec_load(&s.st_mtim), - timespec_load(&s.st_atim)); - if (age >= cutoff) - continue; - - log_debug("rmdir '%s'\n", sub_path); - - if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) { - if (errno != ENOENT && errno != ENOTEMPTY) { - log_error("rmdir(%s): %m", sub_path); - r = -errno; - } - } - - } else { - /* Skip files for which the sticky bit is - * set. These are semantics we define, and are - * unknown elsewhere. See XDG_RUNTIME_DIR - * specification for details. */ - if (s.st_mode & S_ISVTX) - continue; - - if (mountpoint && S_ISREG(s.st_mode)) { - if (streq(dent->d_name, ".journal") && - s.st_uid == 0) - continue; - - if (streq(dent->d_name, "aquota.user") || - streq(dent->d_name, "aquota.group")) - continue; - } - - /* Ignore sockets that are listed in /proc/net/unix */ - if (S_ISSOCK(s.st_mode) && unix_socket_alive(sub_path)) - continue; - - /* Ignore device nodes */ - if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) - continue; - - /* Keep files on this level around if this is - * requested */ - if (keep_this_level) - continue; - - age = MAX3(timespec_load(&s.st_mtim), - timespec_load(&s.st_atim), - timespec_load(&s.st_ctim)); - - if (age >= cutoff) - continue; - - log_debug("unlink '%s'\n", sub_path); - - if (unlinkat(dirfd(d), dent->d_name, 0) < 0) { - if (errno != ENOENT) { - log_error("unlink(%s): %m", sub_path); - r = -errno; - } - } - - deleted = true; - } - } - -finish: - if (deleted) { - /* Restore original directory timestamps */ - times[0] = ds->st_atim; - times[1] = ds->st_mtim; - - if (futimens(dirfd(d), times) < 0) - log_error("utimensat(%s): %m", p); - } - - free(sub_path); - - return r; -} - -static int clean_item(Item *i) { - DIR *d; - struct stat s, ps; - bool mountpoint; - int r; - usec_t cutoff, n; - - assert(i); - - if (i->type != CREATE_DIRECTORY && - i->type != TRUNCATE_DIRECTORY && - i->type != IGNORE_PATH) - return 0; - - if (!i->age_set) - return 0; - - n = now(CLOCK_REALTIME); - if (n < i->age) - return 0; - - cutoff = n - i->age; - - d = opendir(i->path); - if (!d) { - if (errno == ENOENT) - return 0; - - log_error("Failed to open directory %s: %m", i->path); - return -errno; - } - - if (fstat(dirfd(d), &s) < 0) { - log_error("stat(%s) failed: %m", i->path); - r = -errno; - goto finish; - } - - if (!S_ISDIR(s.st_mode)) { - log_error("%s is not a directory.", i->path); - r = -ENOTDIR; - goto finish; - } - - if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) { - log_error("stat(%s/..) failed: %m", i->path); - r = -errno; - goto finish; - } - - mountpoint = s.st_dev != ps.st_dev || - (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino); - - r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH, i->keep_first_level); - -finish: - if (d) - closedir(d); - - return r; -} - -static int item_set_perms(Item *i, const char *path) { - /* not using i->path directly because it may be a glob */ - if (i->mode_set) - if (chmod(path, i->mode) < 0) { - log_error("chmod(%s) failed: %m", path); - return -errno; - } - - if (i->uid_set || i->gid_set) - if (chown(path, - i->uid_set ? i->uid : (uid_t) -1, - i->gid_set ? i->gid : (gid_t) -1) < 0) { - - log_error("chown(%s) failed: %m", path); - return -errno; - } - - return label_fix(path, false, false); -} - -static int write_one_file(Item *i, const char *path) { - int r, e, fd, flags; - struct stat st; - mode_t u; - - flags = i->type == CREATE_FILE ? O_CREAT|O_APPEND : - i->type == TRUNCATE_FILE ? O_CREAT|O_TRUNC : 0; - - u = umask(0); - label_context_set(path, S_IFREG); - fd = open(path, flags|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW, i->mode); - e = errno; - label_context_clear(); - umask(u); - errno = e; - - if (fd < 0) { - if (i->type == WRITE_FILE && errno == ENOENT) - return 0; - - log_error("Failed to create file %s: %m", path); - return -errno; - } - - if (i->argument) { - ssize_t n; - size_t l; - _cleanup_free_ char *unescaped; - - unescaped = cunescape(i->argument); - if (unescaped == NULL) - return log_oom(); - - l = strlen(unescaped); - n = write(fd, unescaped, l); - - if (n < 0 || (size_t) n < l) { - log_error("Failed to write file %s: %s", path, n < 0 ? strerror(-n) : "Short write"); - close_nointr_nofail(fd); - return n < 0 ? n : -EIO; - } - } - - close_nointr_nofail(fd); - - if (stat(path, &st) < 0) { - log_error("stat(%s) failed: %m", path); - return -errno; - } - - if (!S_ISREG(st.st_mode)) { - log_error("%s is not a file.", path); - return -EEXIST; - } - - r = item_set_perms(i, path); - if (r < 0) - return r; - - return 0; -} - -static int recursive_relabel_children(Item *i, const char *path) { - DIR *d; - int ret = 0; - - /* This returns the first error we run into, but nevertheless - * tries to go on */ - - d = opendir(path); - if (!d) - return errno == ENOENT ? 0 : -errno; - - for (;;) { - struct dirent *de; - union dirent_storage buf; - bool is_dir; - int r; - char *entry_path; - - r = readdir_r(d, &buf.de, &de); - if (r != 0) { - if (ret == 0) - ret = -r; - break; - } - - if (!de) - break; - - if (streq(de->d_name, ".") || streq(de->d_name, "..")) - continue; - - if (asprintf(&entry_path, "%s/%s", path, de->d_name) < 0) { - if (ret == 0) - ret = -ENOMEM; - continue; - } - - if (de->d_type == DT_UNKNOWN) { - struct stat st; - - if (lstat(entry_path, &st) < 0) { - if (ret == 0 && errno != ENOENT) - ret = -errno; - free(entry_path); - continue; - } - - is_dir = S_ISDIR(st.st_mode); - - } else - is_dir = de->d_type == DT_DIR; - - r = item_set_perms(i, entry_path); - if (r < 0) { - if (ret == 0 && r != -ENOENT) - ret = r; - free(entry_path); - continue; - } - - if (is_dir) { - r = recursive_relabel_children(i, entry_path); - if (r < 0 && ret == 0) - ret = r; - } - - free(entry_path); - } - - closedir(d); - - return ret; -} - -static int recursive_relabel(Item *i, const char *path) { - int r; - struct stat st; - - r = item_set_perms(i, path); - if (r < 0) - return r; - - if (lstat(path, &st) < 0) - return -errno; - - if (S_ISDIR(st.st_mode)) - r = recursive_relabel_children(i, path); - - return r; -} - -static int glob_item(Item *i, int (*action)(Item *, const char *)) { - int r = 0, k; - glob_t g; - char **fn; - - zero(g); - - errno = 0; - if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) { - - if (k != GLOB_NOMATCH) { - if (errno != 0) - errno = EIO; - - log_error("glob(%s) failed: %m", i->path); - return -errno; - } - } - - STRV_FOREACH(fn, g.gl_pathv) - if ((k = action(i, *fn)) < 0) - r = k; - - globfree(&g); - return r; -} - -static int create_item(Item *i) { - int r, e; - mode_t u; - struct stat st; - - assert(i); - - switch (i->type) { - - case IGNORE_PATH: - case REMOVE_PATH: - case RECURSIVE_REMOVE_PATH: - return 0; - - case CREATE_FILE: - case TRUNCATE_FILE: - r = write_one_file(i, i->path); - if (r < 0) - return r; - break; - case WRITE_FILE: - r = glob_item(i, write_one_file); - if (r < 0) - return r; - - break; - - case TRUNCATE_DIRECTORY: - case CREATE_DIRECTORY: - - u = umask(0); - mkdir_parents_label(i->path, 0755); - r = mkdir(i->path, i->mode); - umask(u); - - if (r < 0 && errno != EEXIST) { - log_error("Failed to create directory %s: %m", i->path); - return -errno; - } - - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } - - if (!S_ISDIR(st.st_mode)) { - log_error("%s is not a directory.", i->path); - return -EEXIST; - } - - r = item_set_perms(i, i->path); - if (r < 0) - return r; - - break; - - case CREATE_FIFO: - - u = umask(0); - r = mkfifo(i->path, i->mode); - umask(u); - - if (r < 0 && errno != EEXIST) { - log_error("Failed to create fifo %s: %m", i->path); - return -errno; - } - - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } - - if (!S_ISFIFO(st.st_mode)) { - log_error("%s is not a fifo.", i->path); - return -EEXIST; - } - - r = item_set_perms(i, i->path); - if (r < 0) - return r; - - break; - - case CREATE_SYMLINK: { - char *x; - - label_context_set(i->path, S_IFLNK); - r = symlink(i->argument, i->path); - e = errno; - label_context_clear(); - errno = e; - - if (r < 0 && errno != EEXIST) { - log_error("symlink(%s, %s) failed: %m", i->argument, i->path); - return -errno; - } - - r = readlink_malloc(i->path, &x); - if (r < 0) { - log_error("readlink(%s) failed: %s", i->path, strerror(-r)); - return -errno; - } - - if (!streq(i->argument, x)) { - free(x); - log_error("%s is not the right symlinks.", i->path); - return -EEXIST; - } - - free(x); - break; - } - - case CREATE_BLOCK_DEVICE: - case CREATE_CHAR_DEVICE: { - mode_t file_type; - - if (have_effective_cap(CAP_MKNOD) == 0) { - /* In a container we lack CAP_MKNOD. We - shouldnt attempt to create the device node in - that case to avoid noise, and we don't support - virtualized devices in containers anyway. */ - - log_debug("We lack CAP_MKNOD, skipping creation of device node %s.", i->path); - return 0; - } - - file_type = (i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR); - - u = umask(0); - label_context_set(i->path, file_type); - r = mknod(i->path, i->mode | file_type, i->major_minor); - e = errno; - label_context_clear(); - umask(u); - errno = e; - - if (r < 0 && errno != EEXIST) { - log_error("Failed to create device node %s: %m", i->path); - return -errno; - } - - if (stat(i->path, &st) < 0) { - log_error("stat(%s) failed: %m", i->path); - return -errno; - } - - if ((st.st_mode & S_IFMT) != file_type) { - log_error("%s is not a device node.", i->path); - return -EEXIST; - } - - r = item_set_perms(i, i->path); - if (r < 0) - return r; - - break; - } - - case RELABEL_PATH: - - r = glob_item(i, item_set_perms); - if (r < 0) - return 0; - break; - - case RECURSIVE_RELABEL_PATH: - - r = glob_item(i, recursive_relabel); - if (r < 0) - return r; - } - - log_debug("%s created successfully.", i->path); - - return 0; -} - -static int remove_item_instance(Item *i, const char *instance) { - int r; - - assert(i); - - switch (i->type) { - - case CREATE_FILE: - case TRUNCATE_FILE: - case CREATE_DIRECTORY: - case CREATE_FIFO: - case CREATE_SYMLINK: - case CREATE_BLOCK_DEVICE: - case CREATE_CHAR_DEVICE: - case IGNORE_PATH: - case RELABEL_PATH: - case RECURSIVE_RELABEL_PATH: - case WRITE_FILE: - break; - - case REMOVE_PATH: - if (remove(instance) < 0 && errno != ENOENT) { - log_error("remove(%s): %m", instance); - return -errno; - } - - break; - - case TRUNCATE_DIRECTORY: - case RECURSIVE_REMOVE_PATH: - /* FIXME: we probably should use dir_cleanup() here - * instead of rm_rf() so that 'x' is honoured. */ - r = rm_rf_dangerous(instance, false, i->type == RECURSIVE_REMOVE_PATH, false); - if (r < 0 && r != -ENOENT) { - log_error("rm_rf(%s): %s", instance, strerror(-r)); - return r; - } - - break; - } - - return 0; -} - -static int remove_item(Item *i) { - int r = 0; - - assert(i); - - switch (i->type) { - - case CREATE_FILE: - case TRUNCATE_FILE: - case CREATE_DIRECTORY: - case CREATE_FIFO: - case CREATE_SYMLINK: - case CREATE_CHAR_DEVICE: - case CREATE_BLOCK_DEVICE: - case IGNORE_PATH: - case RELABEL_PATH: - case RECURSIVE_RELABEL_PATH: - case WRITE_FILE: - break; - - case REMOVE_PATH: - case TRUNCATE_DIRECTORY: - case RECURSIVE_REMOVE_PATH: - r = glob_item(i, remove_item_instance); - break; - } - - return r; -} - -static int process_item(Item *i) { - int r, q, p; - - assert(i); - - r = arg_create ? create_item(i) : 0; - q = arg_remove ? remove_item(i) : 0; - p = arg_clean ? clean_item(i) : 0; - - if (r < 0) - return r; - - if (q < 0) - return q; - - return p; -} - -static void item_free(Item *i) { - assert(i); - - free(i->path); - free(i->argument); - free(i); -} - -static bool item_equal(Item *a, Item *b) { - assert(a); - assert(b); - - if (!streq_ptr(a->path, b->path)) - return false; - - if (a->type != b->type) - return false; - - if (a->uid_set != b->uid_set || - (a->uid_set && a->uid != b->uid)) - return false; - - if (a->gid_set != b->gid_set || - (a->gid_set && a->gid != b->gid)) - return false; - - if (a->mode_set != b->mode_set || - (a->mode_set && a->mode != b->mode)) - return false; - - if (a->age_set != b->age_set || - (a->age_set && a->age != b->age)) - return false; - - if ((a->type == CREATE_FILE || - a->type == TRUNCATE_FILE || - a->type == WRITE_FILE || - a->type == CREATE_SYMLINK) && - !streq_ptr(a->argument, b->argument)) - return false; - - if ((a->type == CREATE_CHAR_DEVICE || - a->type == CREATE_BLOCK_DEVICE) && - a->major_minor != b->major_minor) - return false; - - return true; -} - -static int parse_line(const char *fname, unsigned line, const char *buffer) { - Item *i, *existing; - char *mode = NULL, *user = NULL, *group = NULL, *age = NULL; - char type; - Hashmap *h; - int r, n = -1; - - assert(fname); - assert(line >= 1); - assert(buffer); - - i = new0(Item, 1); - if (!i) - return log_oom(); - - if (sscanf(buffer, - "%c " - "%ms " - "%ms " - "%ms " - "%ms " - "%ms " - "%n", - &type, - &i->path, - &mode, - &user, - &group, - &age, - &n) < 2) { - log_error("[%s:%u] Syntax error.", fname, line); - r = -EIO; - goto finish; - } - - if (n >= 0) { - n += strspn(buffer+n, WHITESPACE); - if (buffer[n] != 0 && (buffer[n] != '-' || buffer[n+1] != 0)) { - i->argument = unquote(buffer+n, "\""); - if (!i->argument) - return log_oom(); - } - } - - switch(type) { - - case CREATE_FILE: - case TRUNCATE_FILE: - case CREATE_DIRECTORY: - case TRUNCATE_DIRECTORY: - case CREATE_FIFO: - case IGNORE_PATH: - case REMOVE_PATH: - case RECURSIVE_REMOVE_PATH: - case RELABEL_PATH: - case RECURSIVE_RELABEL_PATH: - break; - - case CREATE_SYMLINK: - if (!i->argument) { - log_error("[%s:%u] Symlink file requires argument.", fname, line); - r = -EBADMSG; - goto finish; - } - break; - - case WRITE_FILE: - if (!i->argument) { - log_error("[%s:%u] Write file requires argument.", fname, line); - r = -EBADMSG; - goto finish; - } - break; - - case CREATE_CHAR_DEVICE: - case CREATE_BLOCK_DEVICE: { - unsigned major, minor; - - if (!i->argument) { - log_error("[%s:%u] Device file requires argument.", fname, line); - r = -EBADMSG; - goto finish; - } - - if (sscanf(i->argument, "%u:%u", &major, &minor) != 2) { - log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i->argument); - r = -EBADMSG; - goto finish; - } - - i->major_minor = makedev(major, minor); - break; - } - - default: - log_error("[%s:%u] Unknown file type '%c'.", fname, line, type); - r = -EBADMSG; - goto finish; - } - - i->type = type; - - if (!path_is_absolute(i->path)) { - log_error("[%s:%u] Path '%s' not absolute.", fname, line, i->path); - r = -EBADMSG; - goto finish; - } - - path_kill_slashes(i->path); - - if (arg_prefix && !path_startswith(i->path, arg_prefix)) { - r = 0; - goto finish; - } - - if (user && !streq(user, "-")) { - const char *u = user; - - r = get_user_creds(&u, &i->uid, NULL, NULL, NULL); - if (r < 0) { - log_error("[%s:%u] Unknown user '%s'.", fname, line, user); - goto finish; - } - - i->uid_set = true; - } - - if (group && !streq(group, "-")) { - const char *g = group; - - r = get_group_creds(&g, &i->gid); - if (r < 0) { - log_error("[%s:%u] Unknown group '%s'.", fname, line, group); - goto finish; - } - - i->gid_set = true; - } - - if (mode && !streq(mode, "-")) { - unsigned m; - - if (sscanf(mode, "%o", &m) != 1) { - log_error("[%s:%u] Invalid mode '%s'.", fname, line, mode); - r = -ENOENT; - goto finish; - } - - i->mode = m; - i->mode_set = true; - } else - i->mode = - i->type == CREATE_DIRECTORY || - i->type == TRUNCATE_DIRECTORY ? 0755 : 0644; - - if (age && !streq(age, "-")) { - const char *a = age; - - if (*a == '~') { - i->keep_first_level = true; - a++; - } - - if (parse_usec(a, &i->age) < 0) { - log_error("[%s:%u] Invalid age '%s'.", fname, line, age); - r = -EBADMSG; - goto finish; - } - - i->age_set = true; - } - - h = needs_glob(i->type) ? globs : items; - - existing = hashmap_get(h, i->path); - if (existing) { - - /* Two identical items are fine */ - if (!item_equal(existing, i)) - log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path); - - r = 0; - goto finish; - } - - r = hashmap_put(h, i->path, i); - if (r < 0) { - log_error("Failed to insert item %s: %s", i->path, strerror(-r)); - goto finish; - } - - i = NULL; - r = 0; - -finish: - free(user); - free(group); - free(mode); - free(age); - - if (i) - item_free(i); - - return r; -} - -static int help(void) { - - printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" - "Creates, deletes and cleans up volatile and temporary files and directories.\n\n" - " -h --help Show this help\n" - " --create Create marked files/directories\n" - " --clean Clean up marked directories\n" - " --remove Remove marked files/directories\n" - " --prefix=PATH Only apply rules that apply to paths with the specified prefix\n", - program_invocation_short_name); - - return 0; -} - -static int parse_argv(int argc, char *argv[]) { - - enum { - ARG_CREATE, - ARG_CLEAN, - ARG_REMOVE, - ARG_PREFIX - }; - - static const struct option options[] = { - { "help", no_argument, NULL, 'h' }, - { "create", no_argument, NULL, ARG_CREATE }, - { "clean", no_argument, NULL, ARG_CLEAN }, - { "remove", no_argument, NULL, ARG_REMOVE }, - { "prefix", required_argument, NULL, ARG_PREFIX }, - { NULL, 0, NULL, 0 } - }; - - int c; - - assert(argc >= 0); - assert(argv); - - while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { - - switch (c) { - - case 'h': - help(); - return 0; - - case ARG_CREATE: - arg_create = true; - break; - - case ARG_CLEAN: - arg_clean = true; - break; - - case ARG_REMOVE: - arg_remove = true; - break; - - case ARG_PREFIX: - arg_prefix = optarg; - break; - - case '?': - return -EINVAL; - - default: - log_error("Unknown option code %c", c); - return -EINVAL; - } - } - - if (!arg_clean && !arg_create && !arg_remove) { - log_error("You need to specify at least one of --clean, --create or --remove."); - return -EINVAL; - } - - return 1; -} - -static int read_config_file(const char *fn, bool ignore_enoent) { - FILE *f; - unsigned v = 0; - int r = 0; - - assert(fn); - - f = fopen(fn, "re"); - if (!f) { - - if (ignore_enoent && errno == ENOENT) - return 0; - - log_error("Failed to open %s: %m", fn); - return -errno; - } - - log_debug("apply: %s\n", fn); - for (;;) { - char line[LINE_MAX], *l; - int k; - - if (!(fgets(line, sizeof(line), f))) - break; - - v++; - - l = strstrip(line); - if (*l == '#' || *l == 0) - continue; - - if ((k = parse_line(fn, v, l)) < 0) - if (r == 0) - r = k; - } - - if (ferror(f)) { - log_error("Failed to read from file %s: %m", fn); - if (r == 0) - r = -EIO; - } - - fclose(f); - - return r; -} - -static char *resolve_fragment(const char *fragment, const char **search_paths) { - const char **p; - char *resolved_path; - - if (is_path(fragment)) - return strdup(fragment); - - STRV_FOREACH(p, search_paths) { - resolved_path = strjoin(*p, "/", fragment, NULL); - if (resolved_path == NULL) { - log_oom(); - return NULL; - } - - if (access(resolved_path, F_OK) == 0) - return resolved_path; - - free(resolved_path); - } - - errno = ENOENT; - return NULL; -} - -int main(int argc, char *argv[]) { - int r; - Item *i; - Iterator iterator; - - r = parse_argv(argc, argv); - if (r <= 0) - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; - - log_set_target(LOG_TARGET_AUTO); - log_parse_environment(); - log_open(); - - umask(0022); - - label_init(NULL); - - items = hashmap_new(string_hash_func, string_compare_func); - globs = hashmap_new(string_hash_func, string_compare_func); - - if (!items || !globs) { - log_oom(); - r = EXIT_FAILURE; - goto finish; - } - - r = EXIT_SUCCESS; - - if (optind < argc) { - int j; - - for (j = optind; j < argc; j++) { - char *fragment; - - fragment = resolve_fragment(argv[j], (const char **)conf_file_dirs); - if (!fragment) { - log_error("Failed to find a %s file: %m", argv[j]); - r = EXIT_FAILURE; - goto finish; - } - if (read_config_file(fragment, false) < 0) - r = EXIT_FAILURE; - free(fragment); - } - - } else { - char **files, **f; - - r = conf_files_list_strv(&files, ".conf", (const char **)conf_file_dirs); - if (r < 0) { - log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r)); - r = EXIT_FAILURE; - goto finish; - } - - STRV_FOREACH(f, files) { - if (read_config_file(*f, true) < 0) - r = EXIT_FAILURE; - } - - strv_free(files); - } - - HASHMAP_FOREACH(i, globs, iterator) - process_item(i); - - HASHMAP_FOREACH(i, items, iterator) - process_item(i); - -finish: - while ((i = hashmap_steal_first(items))) - item_free(i); - - while ((i = hashmap_steal_first(globs))) - item_free(i); - - hashmap_free(items); - hashmap_free(globs); - - set_free_free(unix_sockets); - - label_finish(); - - return r; -} |