| /*-*- 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 || i->age <= 0) |
| 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: |
| 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; |
| } |