X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Ftmpfiles.c;h=20960196991efb277a519131f32976b377eba53c;hp=c5397ef846ca2cdcabbc945ee7efd0c2f37910e9;hb=468d726bdd0a383713964dec01fc38ca31256d62;hpb=4ff21d85822b521ed6741ef88cb4aaa384539dec diff --git a/src/tmpfiles.c b/src/tmpfiles.c index c5397ef84..209601969 100644 --- a/src/tmpfiles.c +++ b/src/tmpfiles.c @@ -47,32 +47,40 @@ /* 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, /var/run and - * /var/lock which are volatile and hence need to be recreated on - * bootup. */ + * properly owned directories beneath /tmp, /var/tmp, /run, which are + * volatile and hence need to be recreated on bootup. */ -enum { +typedef enum ItemType { /* These ones take file names */ CREATE_FILE = 'f', TRUNCATE_FILE = 'F', 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' -}; + RECURSIVE_REMOVE_PATH = 'R', + RELABEL_PATH = 'z', + RECURSIVE_RELABEL_PATH = 'Z' +} ItemType; typedef struct Item { - char type; + 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; @@ -90,8 +98,8 @@ static const char *arg_prefix = NULL; #define MAX_DEPTH 256 -static bool needs_glob(int t) { - return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH; +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) { @@ -115,41 +123,50 @@ static void load_unix_sockets(void) { /* We maintain a cache of the sockets we found in * /proc/net/unix to speed things up a little. */ - if (!(unix_sockets = set_new(string_hash_func, string_compare_func))) + unix_sockets = set_new(string_hash_func, string_compare_func); + if (!unix_sockets) return; - if (!(f = fopen("/proc/net/unix", "re"))) + f = fopen("/proc/net/unix", "re"); + if (!f) return; - if (!(fgets(line, sizeof(line), f))) + /* Skip header */ + if (!fgets(line, sizeof(line), f)) goto fail; for (;;) { char *p, *s; int k; - if (!(fgets(line, sizeof(line), f))) + if (!fgets(line, sizeof(line), f)) break; truncate_nl(line); - if (strlen(line) < 53) + p = strchr(line, ':'); + if (!p) + continue; + + if (strlen(p) < 37) continue; - p = line + 53; + p += 37; p += strspn(p, WHITESPACE); - p += strcspn(p, WHITESPACE); + p += strcspn(p, WHITESPACE); /* skip one more word */ p += strspn(p, WHITESPACE); if (*p != '/') continue; - if (!(s = strdup(p))) + s = strdup(p); + if (!s) goto fail; path_kill_slashes(s); - if ((k = set_put(unix_sockets, s)) < 0) { + k = set_put(unix_sockets, s); + if (k < 0) { free(s); if (k != -EEXIST) @@ -157,6 +174,7 @@ static void load_unix_sockets(void) { } } + fclose(f); return; fail: @@ -303,6 +321,10 @@ static int dir_cleanup( 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; + age = MAX3(timespec_load(&s.st_mtim), timespec_load(&s.st_atim), timespec_load(&s.st_ctim)); @@ -400,8 +422,145 @@ finish: 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); +} + +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 buf, *de; + bool is_dir; + int r; + char *entry_path; + + r = readdir_r(d, &buf, &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 fd = -1, r; + int r; mode_t u; struct stat st; @@ -415,7 +574,8 @@ static int create_item(Item *i) { return 0; case CREATE_FILE: - case TRUNCATE_FILE: + case TRUNCATE_FILE: { + int fd; u = umask(0); fd = open(i->path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW| @@ -424,98 +584,158 @@ static int create_item(Item *i) { if (fd < 0) { log_error("Failed to create file %s: %m", i->path); - r = -errno; - goto finish; + return -errno; } - if (fstat(fd, &st) < 0) { + close_nointr_nofail(fd); + + if (stat(i->path, &st) < 0) { log_error("stat(%s) failed: %m", i->path); - r = -errno; - goto finish; + return -errno; } if (!S_ISREG(st.st_mode)) { log_error("%s is not a file.", i->path); - r = -EEXIST; - goto finish; + return -EEXIST; } - if (i->mode_set) - if (fchmod(fd, i->mode) < 0) { - log_error("chmod(%s) failed: %m", i->path); - r = -errno; - goto finish; - } - - if (i->uid_set || i->gid_set) - if (fchown(fd, - i->uid_set ? i->uid : (uid_t) -1, - i->gid_set ? i->gid : (gid_t) -1) < 0) { - log_error("chown(%s) failed: %m", i->path); - r = -errno; - goto finish; - } + r = item_set_perms(i, i->path); + if (r < 0) + return r; break; + } case TRUNCATE_DIRECTORY: case CREATE_DIRECTORY: u = umask(0); + mkdir_parents(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); - r = -errno; - goto finish; + return -errno; } if (stat(i->path, &st) < 0) { log_error("stat(%s) failed: %m", i->path); - r = -errno; - goto finish; + return -errno; } if (!S_ISDIR(st.st_mode)) { log_error("%s is not a directory.", i->path); - r = -EEXIST; - goto finish; + return -EEXIST; } - if (i->mode_set) - if (chmod(i->path, i->mode) < 0) { - log_error("chmod(%s) failed: %m", i->path); - r = -errno; - goto finish; - } + r = item_set_perms(i, i->path); + if (r < 0) + return r; - if (i->uid_set || i->gid_set) - if (chown(i->path, - i->uid_set ? i->uid : (uid_t) -1, - i->gid_set ? i->gid : (gid_t) -1) < 0) { + break; - log_error("chown(%s) failed: %m", i->path); - r = -errno; - goto finish; - } + 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; + + r = symlink(i->argument, i->path); + 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; } - if ((r = label_fix(i->path)) < 0) - goto finish; + case CREATE_BLOCK_DEVICE: + case CREATE_CHAR_DEVICE: { - log_debug("%s created successfully.", i->path); + u = umask(0); + r = mknod(i->path, i->mode | (i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR), i->major_minor); + umask(u); -finish: - if (fd >= 0) - close_nointr_nofail(fd); + if (r < 0 && errno != EEXIST) { + log_error("Failed to create device node %s: %m", i->path); + return -errno; + } - return r; + if (stat(i->path, &st) < 0) { + log_error("stat(%s) failed: %m", i->path); + return -errno; + } + + if (i->type == CREATE_BLOCK_DEVICE ? !S_ISBLK(st.st_mode) : !S_ISCHR(st.st_mode)) { + 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(Item *i, const char *instance) { +static int remove_item_instance(Item *i, const char *instance) { int r; assert(i); @@ -525,7 +745,13 @@ static int remove_item(Item *i, const char *instance) { 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: break; case REMOVE_PATH: @@ -538,8 +764,8 @@ static int remove_item(Item *i, const char *instance) { case TRUNCATE_DIRECTORY: case RECURSIVE_REMOVE_PATH: - if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH)) < 0 && - r != -ENOENT) { + r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false); + if (r < 0 && r != -ENOENT) { log_error("rm_rf(%s): %s", instance, strerror(-r)); return r; } @@ -550,7 +776,9 @@ static int remove_item(Item *i, const char *instance) { return 0; } -static int remove_item_glob(Item *i) { +static int remove_item(Item *i) { + int r = 0; + assert(i); switch (i->type) { @@ -558,40 +786,23 @@ static int remove_item_glob(Item *i) { 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: break; case REMOVE_PATH: case TRUNCATE_DIRECTORY: - case RECURSIVE_REMOVE_PATH: { - 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 = remove_item(i, *fn)) < 0) - r = k; - - globfree(&g); - return r; - } + case RECURSIVE_REMOVE_PATH: + r = glob_item(i, remove_item_instance); + break; } - return 0; + return r; } static int process_item(Item *i) { @@ -600,7 +811,7 @@ static int process_item(Item *i) { assert(i); r = arg_create ? create_item(i) : 0; - q = arg_remove ? remove_item_glob(i) : 0; + q = arg_remove ? remove_item(i) : 0; p = arg_clean ? clean_item(i) : 0; if (r < 0) @@ -616,19 +827,61 @@ 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_SYMLINK && + !streq(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; + Item *i, *existing; char *mode = NULL, *user = NULL, *group = NULL, *age = NULL; + char type; + Hashmap *h; int r; assert(fname); assert(line >= 1); assert(buffer); - if (!(i = new0(Item, 1))) { + i = new0(Item, 1); + if (!i) { log_error("Out of memory"); return -ENOMEM; } @@ -639,30 +892,70 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { "%ms " "%ms " "%ms " + "%ms " "%ms", - &i->type, + &type, &i->path, &mode, &user, &group, - &age) < 2) { + &age, + &i->argument) < 2) { log_error("[%s:%u] Syntax error.", fname, line); r = -EIO; goto finish; } - if (i->type != CREATE_FILE && - i->type != TRUNCATE_FILE && - i->type != CREATE_DIRECTORY && - i->type != TRUNCATE_DIRECTORY && - i->type != IGNORE_PATH && - i->type != REMOVE_PATH && - i->type != RECURSIVE_REMOVE_PATH) { - log_error("[%s:%u] Unknown file type '%c'.", fname, line, i->type); + 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 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; @@ -677,18 +970,11 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { } if (user && !streq(user, "-")) { - unsigned long lu; - struct passwd *p; - - if (streq(user, "root") || streq(user, "0")) - i->uid = 0; - else if (safe_atolu(user, &lu) >= 0) - i->uid = (uid_t) lu; - else if ((p = getpwnam(user))) - i->uid = p->pw_uid; - else { + const char *u = user; + + r = get_user_creds(&u, &i->uid, NULL, NULL); + if (r < 0) { log_error("[%s:%u] Unknown user '%s'.", fname, line, user); - r = -ENOENT; goto finish; } @@ -696,18 +982,11 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { } if (group && !streq(group, "-")) { - unsigned long lu; - struct group *g; - - if (streq(group, "root") || streq(group, "0")) - i->gid = 0; - else if (safe_atolu(group, &lu) >= 0) - i->gid = (gid_t) lu; - else if ((g = getgrnam(group))) - i->gid = g->gr_gid; - else { + const char *g = group; + + r = get_group_creds(&g, &i->gid); + if (r < 0) { log_error("[%s:%u] Unknown group '%s'.", fname, line, group); - r = -ENOENT; goto finish; } @@ -726,7 +1005,9 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { i->mode = m; i->mode_set = true; } else - i->mode = i->type == CREATE_DIRECTORY ? 0755 : 0644; + i->mode = + i->type == CREATE_DIRECTORY || + i->type == TRUNCATE_DIRECTORY ? 0755 : 0644; if (age && !streq(age, "-")) { if (parse_usec(age, &i->age) < 0) { @@ -738,13 +1019,21 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) { i->age_set = true; } - if ((r = hashmap_put(needs_glob(i->type) ? globs : items, i->path, i)) < 0) { - if (r == -EEXIST) { + 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 = 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; } @@ -764,19 +1053,6 @@ finish: return r; } -static int scandir_filter(const struct dirent *d) { - assert(d); - - if (ignore_file(d->d_name)) - return 0; - - if (d->d_type != DT_REG && - d->d_type != DT_LNK) - return 0; - - return endswith(d->d_name, ".conf"); -} - static int help(void) { printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" @@ -848,7 +1124,7 @@ static int parse_argv(int argc, char *argv[]) { } if (!arg_clean && !arg_create && !arg_remove) { - log_error("You need to specify at leat one of --clean, --create or --remove."); + log_error("You need to specify at least one of --clean, --create or --remove."); return -EINVAL; } @@ -862,7 +1138,8 @@ static int read_config_file(const char *fn, bool ignore_enoent) { assert(fn); - if (!(f = fopen(fn, "re"))) { + f = fopen(fn, "re"); + if (!f) { if (ignore_enoent && errno == ENOENT) return 0; @@ -871,6 +1148,7 @@ static int read_config_file(const char *fn, bool ignore_enoent) { return -errno; } + log_debug("apply: %s\n", fn); for (;;) { char line[LINE_MAX], *l; int k; @@ -905,13 +1183,16 @@ int main(int argc, char *argv[]) { Item *i; Iterator iterator; - if ((r = parse_argv(argc, argv)) <= 0) + 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(); items = hashmap_new(string_hash_func, string_compare_func); @@ -933,48 +1214,33 @@ int main(int argc, char *argv[]) { r = EXIT_FAILURE; } else { - int n, j; - struct dirent **de = NULL; - - if ((n = scandir("/etc/tmpfiles.d/", &de, scandir_filter, alphasort)) < 0) { - - if (errno != ENOENT) { - log_error("Failed to enumerate /etc/tmpfiles.d/ files: %m"); - r = EXIT_FAILURE; - } - + char **files, **f; + + r = conf_files_list(&files, ".conf", + "/run/tmpfiles.d", + "/etc/tmpfiles.d", + "/usr/local/lib/tmpfiles.d", + "/usr/lib/tmpfiles.d", + NULL); + if (r < 0) { + r = EXIT_FAILURE; + log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r)); goto finish; } - for (j = 0; j < n; j++) { - int k; - char *fn; - - k = asprintf(&fn, "/etc/tmpfiles.d/%s", de[j]->d_name); - free(de[j]); - - if (k < 0) { - log_error("Failed to allocate file name."); - r = EXIT_FAILURE; - continue; - } - - if (read_config_file(fn, true) < 0) + STRV_FOREACH(f, files) { + if (read_config_file(*f, true) < 0) r = EXIT_FAILURE; - - free(fn); } - free(de); + strv_free(files); } HASHMAP_FOREACH(i, globs, iterator) - if (process_item(i) < 0) - r = EXIT_FAILURE; + process_item(i); HASHMAP_FOREACH(i, items, iterator) - if (process_item(i) < 0) - r = EXIT_FAILURE; + process_item(i); finish: while ((i = hashmap_steal_first(items)))