| From 926cfe2647fe3748fd2677a39a76ce29053b7166 Mon Sep 17 00:00:00 2001 |
| From: Avery Pennarun <apenwarr@gmail.com> |
| Date: Tue, 3 Apr 2012 01:06:24 -0400 |
| Subject: [PATCH 2/2] jobs.c: setsid and TIOCSCTTY when enabling job control. |
| |
| Both calls will fail if we are already a process group leader, or the |
| process group leader is not us, or we already have a controlling terminal. |
| So basically these calls are harmless in the worst case, and get rid of the |
| annoying "can't access tty; job control turned off" message in the best |
| case. |
| |
| This makes dash useful with "init=/bin/sh" on the Linux kernel command |
| line. |
| --- |
| src/jobs.c | 4 ++++ |
| 1 files changed, 4 insertions(+), 0 deletions(-) |
| |
| diff --git a/src/jobs.c b/src/jobs.c |
| index a3484c0..0442296 100644 |
| --- a/src/jobs.c |
| +++ b/src/jobs.c |
| @@ -198,6 +198,10 @@ setjobctl(int on) |
| } |
| fd = savefd(fd); |
| do { /* while we are in the background */ |
| + if (tcgetpgrp(fd) < 0) { |
| + setsid(); |
| + ioctl(fd, TIOCSCTTY, 0); |
| + } |
| if ((pgrp = tcgetpgrp(fd)) < 0) { |
| out: |
| sh_warnx("can't access tty; job control turned off"); |
| -- |
| 1.7.9 |
| |
