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| author | Oren Laadan <orenl@cs.columbia.edu> | 2006-01-08 01:03:58 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:14:01 -0800 |
| commit | e19f247a3dbd85485ec13174817ae9c2478fe541 (patch) | |
| tree | 1d6f6fa28d70d51d1ce71264b07ec1afd768e9a6 /kernel | |
| parent | ee0acf90d320c29916ba8c5c1b2e908d81f5057d (diff) | |
| download | op-kernel-dev-e19f247a3dbd85485ec13174817ae9c2478fe541.zip op-kernel-dev-e19f247a3dbd85485ec13174817ae9c2478fe541.tar.gz | |
[PATCH] setpgid: should work for sub-threads
setsid() does not work unless the calling process is a
thread_group_leader().
'man setpgid' does not tell anything about that, so I consider this
behaviour is a bug.
Signed-off-by: Oren Laadan <orenl@cs.columbia.edu>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/exit.c | 2 | ||||
| -rw-r--r-- | kernel/sys.c | 16 |
2 files changed, 8 insertions, 10 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index a80824f..caceabf 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -257,7 +257,7 @@ static inline void reparent_to_init(void) void __set_special_pids(pid_t session, pid_t pgrp) { - struct task_struct *curr = current; + struct task_struct *curr = current->group_leader; if (curr->signal->session != session) { detach_pid(curr, PIDTYPE_SID); diff --git a/kernel/sys.c b/kernel/sys.c index 43e5572..f497bf5 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1215,24 +1215,22 @@ asmlinkage long sys_getsid(pid_t pid) asmlinkage long sys_setsid(void) { + struct task_struct *group_leader = current->group_leader; struct pid *pid; int err = -EPERM; - if (!thread_group_leader(current)) - return -EINVAL; - down(&tty_sem); write_lock_irq(&tasklist_lock); - pid = find_pid(PIDTYPE_PGID, current->pid); + pid = find_pid(PIDTYPE_PGID, group_leader->pid); if (pid) goto out; - current->signal->leader = 1; - __set_special_pids(current->pid, current->pid); - current->signal->tty = NULL; - current->signal->tty_old_pgrp = 0; - err = process_group(current); + group_leader->signal->leader = 1; + __set_special_pids(group_leader->pid, group_leader->pid); + group_leader->signal->tty = NULL; + group_leader->signal->tty_old_pgrp = 0; + err = process_group(group_leader); out: write_unlock_irq(&tasklist_lock); up(&tty_sem); |
