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authorUlrich Drepper <drepper@redhat.com>1999-10-14 19:21:07 +0000
committerUlrich Drepper <drepper@redhat.com>1999-10-14 19:21:07 +0000
commit907ea199d0c9fb94aa311259b42ec9ab447562dc (patch)
treeadc59edb515ca7e2647528ccaf98f1b5b34900e4 /sysdeps
parent02ab9fe3d079f15ae1c0f030bd8bba68c3f0b29b (diff)
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Update.
1999-10-14 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/sleep.c (__sleep): Optimize for zero seconds.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/sleep.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/sleep.c b/sysdeps/unix/sysv/linux/sleep.c
index 5fb11603cf..53968e86c2 100644
--- a/sysdeps/unix/sysv/linux/sleep.c
+++ b/sysdeps/unix/sysv/linux/sleep.c
@@ -1,5 +1,5 @@
/* Implementation of the POSIX sleep function using nanosleep.
- Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
@@ -31,9 +31,12 @@ __sleep (unsigned int seconds)
{
struct timespec ts = { tv_sec: (long int) seconds, tv_nsec: 0 };
sigset_t set, oset;
- struct sigaction oact;
unsigned int result;
+ /* This is not necessary but some buggy programs depend on this. */
+ if (seconds == 0)
+ return 0;
+
/* Linux will wake up the system call, nanosleep, when SIGCHLD
arrives even if SIGCHLD is ignored. We have to deal with it
in libc. We block SIGCHLD first. */
@@ -46,6 +49,10 @@ __sleep (unsigned int seconds)
if (!__sigismember (&oset, SIGCHLD))
{
int saved_errno;
+ struct sigaction oact;
+
+ if (__sigemptyset (&set) < 0 || __sigaddset (&set, SIGCHLD) < 0)
+ return -1;
/* We get the signal handler for SIGCHLD. */
if (__sigaction (SIGCHLD, (struct sigaction *) NULL, &oact) < 0)