X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Ftmpfiles.c;h=18067c4b1f72ef59c9f8c6984324fad6df3344cc;hp=0302262394ef1f694f6f6745a62bc633961832c8;hb=a8d8878329893d19106053e5008f0075f149aa16;hpb=c904f64d84db8c4eebedf210ba10893f19ba05ed

diff --git a/src/tmpfiles.c b/src/tmpfiles.c
index 030226239..18067c4b1 100644
--- a/src/tmpfiles.c
+++ b/src/tmpfiles.c
@@ -47,25 +47,26 @@
 
 /* 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',
 
         /* These ones take globs */
         IGNORE_PATH = 'x',
         REMOVE_PATH = 'r',
-        RECURSIVE_REMOVE_PATH = 'R'
-};
+        RECURSIVE_REMOVE_PATH = 'R',
+        RECURSIVE_RELABEL_PATH = 'Z'
+} ItemType;
 
 typedef struct Item {
-        char type;
+        ItemType type;
 
         char *path;
         uid_t uid;
@@ -90,8 +91,8 @@ 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 == RECURSIVE_RELABEL_PATH;
 }
 
 static struct Item* find_glob(Hashmap *h, const char *match) {
@@ -157,6 +158,7 @@ static void load_unix_sockets(void) {
                 }
         }
 
+        fclose(f);
         return;
 
 fail:
@@ -404,8 +406,144 @@ finish:
         return r;
 }
 
+static int recursive_relabel_children(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 = label_fix(entry_path, false);
+                if (r < 0) {
+                        if (ret == 0 && r != -ENOENT)
+                                ret = r;
+                        free(entry_path);
+                        continue;
+                }
+
+                if (is_dir) {
+                        r = recursive_relabel_children(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 = label_fix(path, false);
+        if (r < 0)
+                return r;
+
+        if (lstat(path, &st) < 0)
+                return -errno;
+
+        if (S_ISDIR(st.st_mode))
+                r = recursive_relabel_children(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 item_set_perms(Item *i) {
+        if (i->mode_set)
+                if (chmod(i->path, i->mode) < 0) {
+                        log_error("chmod(%s) failed: %m", i->path);
+                        return -errno;
+                }
+
+        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) {
+
+                        log_error("chown(%s) failed: %m", i->path);
+                        return -errno;
+                }
+
+        return label_fix(i->path, false);
+}
+
 static int create_item(Item *i) {
-        int fd = -1, r;
+        int r;
         mode_t u;
         struct stat st;
 
@@ -419,7 +557,8 @@ 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|
@@ -428,98 +567,97 @@ 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);
+                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);
+                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);
+                if (r < 0)
+                        return r;
 
                 break;
-        }
 
-        if ((r = label_fix(i->path, false)) < 0)
-                goto finish;
+        case RECURSIVE_RELABEL_PATH:
 
-        log_debug("%s created successfully.", i->path);
+                r = glob_item(i, recursive_relabel);
+                if (r < 0)
+                        return r;
+        }
 
-finish:
-        if (fd >= 0)
-                close_nointr_nofail(fd);
+        log_debug("%s created successfully.", i->path);
 
-        return r;
+        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);
@@ -529,7 +667,9 @@ static int remove_item(Item *i, const char *instance) {
         case CREATE_FILE:
         case TRUNCATE_FILE:
         case CREATE_DIRECTORY:
+        case CREATE_FIFO:
         case IGNORE_PATH:
+        case RECURSIVE_RELABEL_PATH:
                 break;
 
         case REMOVE_PATH:
@@ -542,7 +682,7 @@ 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 &&
+                if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false)) < 0 &&
                     r != -ENOENT) {
                         log_error("rm_rf(%s): %s", instance, strerror(-r));
                         return r;
@@ -554,7 +694,9 @@ 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) {
@@ -562,40 +704,19 @@ static int remove_item_glob(Item *i) {
         case CREATE_FILE:
         case TRUNCATE_FILE:
         case CREATE_DIRECTORY:
+        case CREATE_FIFO:
         case IGNORE_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) {
@@ -604,7 +725,7 @@ 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)
@@ -623,9 +744,40 @@ static void item_free(Item *i) {
         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;
+
+        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);
@@ -644,7 +796,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
                    "%ms "
                    "%ms "
                    "%ms",
-                   &i->type,
+                   &type,
                    &i->path,
                    &mode,
                    &user,
@@ -655,17 +807,20 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
                 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);
+        if (type != CREATE_FILE &&
+            type != TRUNCATE_FILE &&
+            type != CREATE_DIRECTORY &&
+            type != TRUNCATE_DIRECTORY &&
+            type != CREATE_FIFO &&
+            type != IGNORE_PATH &&
+            type != REMOVE_PATH &&
+            type != RECURSIVE_REMOVE_PATH &&
+            type != RECURSIVE_RELABEL_PATH) {
+                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);
@@ -681,18 +836,11 @@ 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;
                 }
 
@@ -700,18 +848,11 @@ 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;
                 }
 
@@ -742,13 +883,19 @@ 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;
+
+        if ((existing = hashmap_get(h, i->path))) {
+
+                /* 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;
+        }
+
+        if ((r = hashmap_put(h, i->path, i)) < 0) {
                 log_error("Failed to insert item %s: %s", i->path, strerror(-r));
                 goto finish;
         }
@@ -768,19 +915,6 @@ 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"
@@ -852,7 +986,7 @@ 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;
         }
 
@@ -875,6 +1009,7 @@ 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;
@@ -916,6 +1051,8 @@ int main(int argc, char *argv[]) {
         log_parse_environment();
         log_open();
 
+        umask(0022);
+
         label_init();
 
         items = hashmap_new(string_hash_func, string_compare_func);
@@ -937,48 +1074,33 @@ 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.");
+                STRV_FOREACH(f, files) {
+                        if (read_config_file(*f, true) < 0)
                                 r = EXIT_FAILURE;
-                                continue;
-                        }
-
-                        if (read_config_file(fn, 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)))