diff -u --recursive --new-file v2.0.0/linux/kernel/sys.c linux/kernel/sys.c
--- v2.0.0/linux/kernel/sys.c Thu Jun 6 17:42:38 1996
+++ linux/kernel/sys.c Tue Jul 2 19:08:43 1996
@@ -634,8 +634,13 @@
asmlinkage int sys_setsid(void)
{
- if (current->leader)
- return -EPERM;
+ struct task_struct * p;
+
+ for_each_task(p) {
+ if (p->pgrp == current->pid)
+ return -EPERM;
+ }
+
Now a process that gets spawned by a shell that sets up the process group
for it (so it's the leader of it's own group, not session) cannot do
a setsid() anymore because the "if (p->pgrp == current->pid)" check will
match on itself.
I now do a "setpgrp(0, getpgid(getppid()))" before setsid() and that works,
but I think the check should be
if (p != current && p->pgrp == current->pid)
return -EPERM;
But that could easily break POSIX conformance, I don't know...
Mike.
-- + Miquel van Smoorenburg + Cistron Internet Services + Living is a | | miquels@cistron.nl (SP6) | Independent Dutch ISP | horizontal | + miquels@drinkel.ow.org + http://www.cistron.nl/ + fall +