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authorUlrich Drepper <drepper@redhat.com>2006-04-23 19:05:33 +0000
committerUlrich Drepper <drepper@redhat.com>2006-04-23 19:05:33 +0000
commit727a6832f033c711fe75c5f742b07087ef5b5133 (patch)
tree9662b191a016789a94526defe03297d48686e19f /sysdeps
parent9055724a92433ffa4c36f93d918ee1b3dfa1d6f7 (diff)
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[BZ #1951]
2006-04-23 Ulrich Drepper <drepper@redhat.com> [BZ #1951] * sysdeps/posix/sigset.c (sigset): Return correct value reflecting previous signal state. * signal/Makefile (tests): Add tst-sigset2. * signal/tst-sigset2.c: New file.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/posix/sigset.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/sysdeps/posix/sigset.c b/sysdeps/posix/sigset.c
index 31e39d7..8f96e3d 100644
--- a/sysdeps/posix/sigset.c
+++ b/sysdeps/posix/sigset.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 2000, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 1998, 2000, 2005, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -29,8 +29,10 @@ sigset (sig, disp)
int sig;
__sighandler_t disp;
{
- struct sigaction act, oact;
+ struct sigaction act;
+ struct sigaction oact;
sigset_t set;
+ sigset_t oset;
#ifdef SIG_HOLD
/* Handle SIG_HOLD first. */
@@ -45,10 +47,18 @@ sigset (sig, disp)
return SIG_ERR;
/* Add the signal set to the current signal mask. */
- if (__sigprocmask (SIG_BLOCK, &set, NULL) < 0)
+ if (__sigprocmask (SIG_BLOCK, &set, &oset) < 0)
return SIG_ERR;
- return SIG_HOLD;
+ /* If the signal was already blocked signal this to the caller. */
+ if (__sigismember (&oset, sig))
+ return SIG_HOLD;
+
+ /* We need to determine whether a specific handler is installed. */
+ if (__sigaction (sig, NULL, &oact) < 0)
+ return SIG_ERR;
+
+ return oact.sa_handler;
}
#endif /* SIG_HOLD */
@@ -75,8 +85,9 @@ sigset (sig, disp)
return SIG_ERR;
/* Remove the signal set from the current signal mask. */
- if (__sigprocmask (SIG_UNBLOCK, &set, NULL) < 0)
+ if (__sigprocmask (SIG_UNBLOCK, &set, &oset) < 0)
return SIG_ERR;
- return oact.sa_handler;
+ /* If the signal was already blocked return SIG_HOLD. */
+ return __sigismember (&oset, sig) ? SIG_HOLD : oact.sa_handler;
}