From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 6 Jan 2011 23:18:51 +0000 (+0100)
Subject: logger: when passing on PID info, fall back to our own if originating process is... 
X-Git-Tag: v16~3
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=2d011a7923a35d8aef49059c2e9010bf1d6a4bac;hp=e83c7c0ba480c6d37d6d586b9337b1ad32ee52ca

logger: when passing on PID info, fall back to our own if originating process is already gone
---

diff --git a/TODO b/TODO
index 14685d233..9acf4dd39 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,5 @@
+* when launching pager, take number of columns first
+
 * support remote/ssh systemctl/systemadm, and local privileged access
 
 * finish syslog socket stuff
diff --git a/src/logger.c b/src/logger.c
index 32c57f8f8..482ec4124 100644
--- a/src/logger.c
+++ b/src/logger.c
@@ -187,8 +187,28 @@ static int stream_log(Stream *s, char *p, usec_t ts) {
                 for (;;) {
                         ssize_t n;
 
-                        if ((n = sendmsg(s->server->syslog_fd, &msghdr, MSG_NOSIGNAL)) < 0)
+                        if ((n = sendmsg(s->server->syslog_fd, &msghdr, MSG_NOSIGNAL)) < 0) {
+
+                                if (errno == ESRCH) {
+                                        pid_t our_pid;
+
+                                        /* Hmm, maybe the process this
+                                         * line originates from is
+                                         * dead? Then let's patch in
+                                         * our own pid and retry,
+                                         * since we have nothing
+                                         * better */
+
+                                        our_pid = getpid();
+
+                                        if (ucred->pid != our_pid) {
+                                                ucred->pid = our_pid;
+                                                continue;
+                                        }
+                                }
+
                                 return -errno;
+                        }
 
                         if (!s->server->syslog_is_stream ||
                             (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec)))