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coredump: format_corename: don't append .%pid if multi-threaded 

If the coredumping is multi-threaded, format_corename() appends .%pid to
the corename.  This was needed before the proper multi-thread core dump
support, now all the threads in the mm go into a single unified core file.

Remove this special case, it is not even documented and we have "%p"
and core_uses_pid.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Michael Kerrisk <mtk.manpages@googlemail.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Roland McGrath <roland@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: La Monte Yarroll <piggy@laurelnetworks.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2008-10-18 20:28:22 -07:00 committed by Linus Torvalds
parent b747c8c102
commit 6409324b38
1 changed files with 3 additions and 4 deletions
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7
fs/exec.c
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@ -1386,7 +1386,7 @@ EXPORT_SYMBOL(set_binfmt);
* name into corename, which must have space for at least
* CORENAME_MAX_SIZE bytes plus one byte for the zero terminator.
*/
static int format_corename(char *corename, int nr_threads, long signr)
static int format_corename(char *corename, long signr)
{
const char *pat_ptr = core_pattern;
int ispipe = (*pat_ptr == '|');
@ -1493,8 +1493,7 @@ static int format_corename(char *corename, int nr_threads, long signr)
* If core_pattern does not include a %p (as is the default)
* and core_uses_pid is set, then .%pid will be appended to
* the filename. Do not do this for piped commands. */
if (!ispipe && !pid_in_pattern
&& (core_uses_pid || nr_threads)) {
if (!ispipe && !pid_in_pattern && core_uses_pid) {
rc = snprintf(out_ptr, out_end - out_ptr,
".%d", task_tgid_vnr(current));
if (rc > out_end - out_ptr)
@ -1757,7 +1756,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
* uses lock_kernel()
*/
lock_kernel();
ispipe = format_corename(corename, retval, signr);
ispipe = format_corename(corename, signr);
unlock_kernel();
/*
* Don't bother to check the RLIMIT_CORE value if core_pattern points