Commit 62e5b05d authored Jun 01, 2007 by Satoru Takeuchi Committed by Linus Torvalds Jun 01, 2007

Better documentation for ERESTARTSYS



Add comment for errnos related to restart syscall to avoid the leakage of
them to user programs.

Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d7083174

include/linux/errno.h

+6 −1

Original line number	Diff line number	Diff line
		@@ -5,7 +5,12 @@

		#ifdef __KERNEL__

		/* Should never be seen by user programs */
		/*
		* These should never be seen by user programs. To return one of ERESTART*
		* codes, signal_pending() MUST be set. Note that ptrace can observe these
		* at syscall exit tracing, but they will never be left for the debugged user
		* process to see.
		*/
		#define ERESTARTSYS 512
		#define ERESTARTNOINTR 513
		#define ERESTARTNOHAND 514 /* restart if no handler.. */