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| author | Ulrich Drepper <drepper@redhat.com> | 2006-04-23 19:05:33 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2006-04-23 19:05:33 +0000 |
| commit | 727a6832f033c711fe75c5f742b07087ef5b5133 (patch) | |
| tree | 9662b191a016789a94526defe03297d48686e19f /sysdeps/posix | |
| parent | 9055724a92433ffa4c36f93d918ee1b3dfa1d6f7 (diff) | |
| download | glibc-727a6832f033c711fe75c5f742b07087ef5b5133.tar.gz glibc-727a6832f033c711fe75c5f742b07087ef5b5133.tar.xz glibc-727a6832f033c711fe75c5f742b07087ef5b5133.zip | |
[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/posix')
| -rw-r--r-- | sysdeps/posix/sigset.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/sysdeps/posix/sigset.c b/sysdeps/posix/sigset.c index 31e39d78b5..8f96e3d610 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; } |