tlib9: restore SIGCHLD handler in rfork - plan9port - [fork] Plan 9 from user space (HTM) git clone git://src.adamsgaard.dk/plan9port (DIR) Log (DIR) Files (DIR) Refs (DIR) README (DIR) LICENSE --- (DIR) commit 333482548d6b93fede42dc1944d3bb692098a211 (DIR) parent f444695a2ab0237262b25c590c2dd9309f225128 (HTM) Author: Russ Cox <rsc@swtch.com> Date: Sun, 1 May 2011 15:38:18 -0400 lib9: restore SIGCHLD handler in rfork R=rsc http://codereview.appspot.com/4436071 Diffstat: M src/lib9/rfork.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) --- (DIR) diff --git a/src/lib9/rfork.c b/src/lib9/rfork.c t@@ -18,6 +18,9 @@ p9rfork(int flags) int n; char buf[128], *q; extern char **environ; + struct sigaction oldchld; + + memset(&oldchld, 0, sizeof oldchld); if((flags&(RFPROC|RFFDG|RFMEM)) == (RFPROC|RFFDG)){ /* check other flags before we commit */ t@@ -28,12 +31,7 @@ p9rfork(int flags) return -1; } if(flags&RFNOWAIT){ - /* - * BUG - should put the signal handler back after we - * finish, but I just don't care. If a program calls with - * NOWAIT once, they're not likely to want child notes - * after that. - */ + sigaction(SIGCHLD, nil, &oldchld); signal(SIGCHLD, nop); if(pipe(p) < 0) return -1; t@@ -97,6 +95,7 @@ p9rfork(int flags) close(p[1]); } } + sigaction(SIGCHLD, &oldchld, nil); } if(pid != 0) return pid;