From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 13 Apr 2011 19:43:36 +0000 (+0200)
Subject: ask-password: use kill(PID, 0) before querying a password
X-Git-Tag: v25~54
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=ded803353137a5b33d3fc460790c0e9b5cb257c1

ask-password: use kill(PID, 0) before querying a password
---

diff --git a/src/tty-ask-password-agent.c b/src/tty-ask-password-agent.c
index 4a29abacb..d7e1ebaef 100644
--- a/src/tty-ask-password-agent.c
+++ b/src/tty-ask-password-agent.c
@@ -291,6 +291,13 @@ static int parse_password(const char *filename, char **wall) {
                 }
         }
 
+        if (pid > 0 &&
+            kill(pid, 0) < 0 &&
+            errno == ESRCH) {
+                r = 0;
+                goto finish;
+        }
+
         if (arg_action == ACTION_LIST)
                 printf("'%s' (PID %u)\n", message, pid);
         else if (arg_action == ACTION_WALL) {