# HG changeset patch
# User Jun Wu <quark@fb.com>
# Date 1460322034 -3600
# Node ID 6e06fbee9244dcfaa75bebe848913e4ab09ad54c
# Parent  39130afcce602f6230f8f5c83f3c524a60a830bb
chg: server exited with code 0 without being connectable is an error

Before this patch, if the server started by chg has exited with code 0 without
creating a connectable unix domain socket at the specified address, chg will
exit with code 0, which is not the correct behavior. It can happen, for
example, CHGHG is set to /bin/true.

This patch addresses the issue by checking the exit code of the server and
printing a new error message if the server exited normally but cannot be
reached.

diff -r 39130afcce60 -r 6e06fbee9244 contrib/chg/chg.c
--- a/contrib/chg/chg.c	Fri Apr 08 23:33:28 2016 -0700
+++ b/contrib/chg/chg.c	Sun Apr 10 22:00:34 2016 +0100
@@ -269,6 +269,9 @@
 
 cleanup:
 	if (WIFEXITED(pst)) {
+		if (WEXITSTATUS(pst) == 0)
+			abortmsg("could not connect to cmdserver "
+				 "(exited with status 0)");
 		debugmsg("cmdserver exited with status %d", WEXITSTATUS(pst));
 		exit(WEXITSTATUS(pst));
 	} else if (WIFSIGNALED(pst)) {