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syscall: allow processes steal a controlling terminal on Linux

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The current implementation of forkAndExecInChild for Linux does not allow
spawned processes steal the controlling terminal from a different session
group. This patch passes 1 as the argument to TIOCSCTTY in order to allow
spawned processes steal controlling terminals.

Fixes #20454

Change-Id: I171b8981509d648b07f89bddc1e9d45cb70e00e6
Reviewed-on: https://go-review.googlesource.com/44343
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Julio Montes 2017-05-22 10:33:31 -05:00 • committed by Ian Lance Taylor
parent c6e7cb4a37
commit 673fdea5e7
1 changed files with 1 additions and 1 deletions
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2
src/syscall/exec_linux.go
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@ -342,7 +342,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
// Set the controlling TTY to Ctty
if sys.Setctty {
_, _, err1 = RawSyscall(SYS_IOCTL, uintptr(sys.Ctty), uintptr(TIOCSCTTY), 0)
_, _, err1 = RawSyscall(SYS_IOCTL, uintptr(sys.Ctty), uintptr(TIOCSCTTY), 1)
if err1 != 0 {
goto childerror
}