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| author | Petter Rodhelind <petter.rodhelind@gmail.com> | 2021-02-18 20:21:24 +0100 |
|---|---|---|
| committer | Petter Rodhelind <petter.rodhelind@gmail.com> | 2021-02-18 20:21:24 +0100 |
| commit | 181d56ee64da53279bb6ecf49c24ab54cfb7193f (patch) | |
| tree | fc6c8736bb97790a257c5514998c583ffce7c41c /src/libthread/daemonize.c | |
| parent | 94c521bf102a74aec7e1a5c3a9ef5eaa968d4e14 (diff) | |
| parent | 90971376a5e8620fc62579aa1b3be26245ec8c06 (diff) | |
| download | plan9port-master.tar.gz plan9port-master.tar.bz2 plan9port-master.zip | |
Diffstat (limited to 'src/libthread/daemonize.c')
| -rw-r--r-- | src/libthread/daemonize.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/src/libthread/daemonize.c b/src/libthread/daemonize.c index 387d1527..29929068 100644 --- a/src/libthread/daemonize.c +++ b/src/libthread/daemonize.c @@ -8,7 +8,7 @@ #undef wait static int sigpid; -static int threadpassfd; +static int threadpassfd = -1; static int gotsigchld; static void @@ -101,6 +101,13 @@ _threadsetupdaemonize(void) sigpid = 1; + /* + * We've been told this program is likely to background itself. + * Put it in its own process group so that we don't get a SIGHUP + * when the parent exits. + */ + setpgrp(); + if(pipe(p) < 0) sysfatal("passer pipe: %r"); @@ -163,9 +170,9 @@ _threadsetupdaemonize(void) void _threaddaemonize(void) { - if(threadpassfd >= 0){ - write(threadpassfd, "0", 1); - close(threadpassfd); - threadpassfd = -1; - } + if(threadpassfd < 0) + sysfatal("threads in main proc exited w/o threadmaybackground"); + write(threadpassfd, "0", 1); + close(threadpassfd); + threadpassfd = -1; } |