Changeset 23458

Timestamp:

12/07/07 13:06:19 (12 months ago)

Author:

zarzycki@…

Message:

<rdar://problem/5619757> SULeoCeto: Detect and fix bogus permissions on /sbin/launchd

Files:

• trunk/launchd/src/launchctl.c (modified) (2 diffs)

trunk/launchd/src/launchctl.c

@@ -152 +152 @@
 static void read_launchd_conf(void);
 static bool job_disabled_logic(launch_data_t obj);
+static void fix_bogus_file_metadata(void);
 
 typedef enum {
@@ -2782 +2783 @@
 
         assumes(fwexec(remount_tool, NULL) != -1);
-}
+
+        fix_bogus_file_metadata();
+}
+
+void
+fix_bogus_file_metadata(void)
+{
+        static const struct {
+                const char *path;
+                const uid_t owner;
+                const gid_t group;
+                const mode_t needed_bits;
+                const mode_t bad_bits;
+        } f[] = {
+                { "/sbin/launchd", 0, 0, S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH, S_ISUID|S_ISGID|S_ISVTX|S_IWOTH },
+                { _PATH_TMP, 0, 0, S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO, S_ISUID|S_ISGID },
+                { _PATH_VARTMP, 0, 0, S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO, S_ISUID|S_ISGID },
+        };
+        struct stat sb;
+        size_t i;
+
+        for (i = 0; i < (sizeof(f) / sizeof(f[0])); i++) {
+                mode_t i_needed_bits;
+                mode_t i_bad_bits;
+                bool fix_mode = false;
+                bool fix_id = false;
+
+                if (!assumes(stat(f[i].path, &sb) != -1)) {
+                        continue;
+                }
+
+                i_needed_bits = ~sb.st_mode & f[i].needed_bits;
+                i_bad_bits = sb.st_mode & f[i].bad_bits;
+
+                if (i_bad_bits) {
+                        fprintf(stderr, "Crucial filesystem check: Removing bogus mode bits 0%o on path: %s\n", i_bad_bits, f[i].path);
+                        fix_mode = true;
+                }
+                if (i_needed_bits) {
+                        fprintf(stderr, "Crucial filesystem check: Adding missing mode bits 0%o on path: %s\n", i_needed_bits, f[i].path);
+                        fix_mode = true;
+                }
+                if (sb.st_uid != f[i].owner) {
+                        fprintf(stderr, "Crucial filesystem check: Fixing bogus UID %u on path: %s\n", sb.st_uid, f[i].path);
+                        fix_id = true;
+                }
+                if (sb.st_gid != f[i].group) {
+                        fprintf(stderr, "Crucial filesystem check: Fixing bogus GID %u on path: %s\n", sb.st_gid, f[i].path);
+                        fix_id = true;
+                }
+
+                if (fix_mode) {
+                        assumes(chmod(f[i].path, (sb.st_mode & ~i_bad_bits) | i_needed_bits) != -1);
+                }
+                if (fix_id) {
+                        assumes(chown(f[i].path, f[i].owner, f[i].group) != -1);
+                }
+        }
+}
+
 
 bool