Changeset 23015

Timestamp:

01/22/07 12:55:07 (23 months ago)

Author:

zarzycki@…

Message:

Nothing like writing code to track down bugs in other software.

Files:

• trunk/launchd/src/launchd_core_logic.c (modified) (3 diffs)

trunk/launchd/src/launchd_core_logic.c

@@ -292 +292 @@
 static void job_setup_fd(job_t j, int target_fd, const char *path, int flags);
 static void job_postfork_become_user(job_t j);
+static void job_find_and_blame_pids_with_weird_uids(job_t j);
 static void job_force_sampletool(job_t j);
 static void job_reparent_hack(job_t j, const char *where);
@@ -1954 +1955 @@
 
 void
+job_find_and_blame_pids_with_weird_uids(job_t j)
+{
+        int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL };
+        size_t i, kp_cnt, len = 10*1024*1024;
+        struct kinfo_proc *kp = malloc(len);
+        uid_t u = j->mach_uid;
+
+        if (!job_assumes(j, sysctl(mib, 3, kp, &len, NULL, 0) != -1)) {
+                return;
+        }
+
+        kp_cnt = len / sizeof(struct kinfo_proc);
+
+        for (i = 0; i <= kp_cnt; i++) {
+                uid_t i_euid = kp[i].kp_eproc.e_ucred.cr_uid;
+                uid_t i_uid = kp[i].kp_eproc.e_pcred.p_ruid;
+                uid_t i_svuid = kp[i].kp_eproc.e_pcred.p_svuid;
+
+                if (i_euid != u && i_uid != u && i_svuid != u) {
+                        continue;
+                }
+
+                job_log(j, LOG_ERR, "PID %u (\"%s\") has no account to back it! (real/effective/saved UIDs: %u/%u/%u)",
+                                kp[i].kp_proc.p_pid, kp[i].kp_proc.p_comm, i_uid, i_euid, i_svuid);
+        }
+
+        free(kp);
+}
+
+void
 job_postfork_become_user(job_t j)
 {
@@ -1975 +2006 @@
                 if ((pwe = getpwuid(j->mach_uid)) == NULL) {
                         job_log(j, LOG_ERR, "getpwuid(\"%u\") failed", j->mach_uid);
+                        job_find_and_blame_pids_with_weird_uids(j);
                         _exit(EXIT_FAILURE);
                 }