X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Ftmpfiles.c;h=13950824e087116e0fff8a3b373e3ebbfbdc0a8c;hb=062e01bbdbc3201e4c99bc0b702cb04a0ae2190c;hp=21bf44d3a41b57897072edfccf9e313452b26a4b;hpb=263653e10353d8ad155f1faba01981816a2bb712;p=elogind.git

diff --git a/src/tmpfiles.c b/src/tmpfiles.c
index 21bf44d3a..13950824e 100644
--- a/src/tmpfiles.c
+++ b/src/tmpfiles.c
@@ -50,7 +50,7 @@
  * 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',
@@ -61,11 +61,12 @@ enum {
         /* 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) {
@@ -405,8 +406,145 @@ 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;
 
@@ -420,7 +558,8 @@ 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|
@@ -429,39 +568,27 @@ 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:
@@ -473,38 +600,22 @@ static int create_item(Item *i) {
 
                 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;
-                        }
-
-                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);
-                                r = -errno;
-                                goto finish;
-                        }
+                r = item_set_perms(i, i->path);
+                if (r < 0)
+                        return r;
 
                 break;
 
@@ -516,54 +627,38 @@ static int create_item(Item *i) {
 
                 if (r < 0 && errno != EEXIST) {
                         log_error("Failed to create fifo %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_ISFIFO(st.st_mode)) {
                         log_error("%s is not a fifo.", 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;
-                        }
-
-                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);
-                                r = -errno;
-                                goto finish;
-                        }
+                r = item_set_perms(i, i->path);
+                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);
@@ -575,6 +670,7 @@ static int remove_item(Item *i, const char *instance) {
         case CREATE_DIRECTORY:
         case CREATE_FIFO:
         case IGNORE_PATH:
+        case RECURSIVE_RELABEL_PATH:
                 break;
 
         case REMOVE_PATH:
@@ -599,7 +695,9 @@ 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) {
@@ -609,39 +707,17 @@ static int remove_item_glob(Item *i) {
         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) {
@@ -650,7 +726,7 @@ 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)
@@ -701,6 +777,7 @@ static bool item_equal(Item *a, Item *b) {
 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;
 
@@ -720,7 +797,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
                    "%ms "
                    "%ms "
                    "%ms",
-                   &i->type,
+                   &type,
                    &i->path,
                    &mode,
                    &user,
@@ -731,18 +808,20 @@ 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 != CREATE_FIFO &&
-            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);