start_stop_daemon: do not stop /proc scan prematurely

function                                             old     new   delta
do_procinit                                          185     196     +11

1 files changed, 12 insertions, 5 deletions

diff --git a/debianutils/start_stop_daemon.c b/debianutils/start_stop_daemon.c
index 2f8e04a78..b6b30e7cc 100644
--- a/debianutils/start_stop_daemon.c
+++ b/debianutils/start_stop_daemon.c
@@ -145,11 +145,18 @@ static void do_procinit(void)
         procdir = xopendir("/proc");
 
         pid = 0;
-        while ((entry = readdir(procdir)) != NULL) {
-                pid = bb_strtou(entry->d_name, NULL, 10);
-                if (errno)
-                        continue;
-                check(pid);
+        while(1) {
+                errno = 0; /* clear any previous error */
+                entry = readdir(procdir);
+// TODO: check for exact errno(s) which mean that we got stale entry
+                if (errno) /* Stale entry, process has died after opendir */
+                        continue;
+                if (!entry) /* EOF, no more entries */
+                        break;
+                pid = bb_strtou(entry->d_name, NULL, 10);
+                if (errno) /* NaN */
+                        continue;
+                check(pid);
         }
         closedir(procdir);
         if (!pid)