| 1 | /* Copyright (C) 2002-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <signal.h> |
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| 19 | #include <pthreadP.h> |
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| 20 | #include <sysdep.h> |
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| 21 | #include <shlib-compat.h> |
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| 22 | |
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| 23 | int |
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| 24 | __pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask) |
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| 25 | { |
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| 26 | sigset_t local_newmask; |
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| 27 | |
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| 28 | /* The only thing we have to make sure here is that SIGCANCEL and |
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| 29 | SIGSETXID is not blocked. */ |
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| 30 | if (newmask != NULL |
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| 31 | && (__glibc_unlikely (__sigismember (newmask, SIGCANCEL)) |
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| 32 | || __glibc_unlikely (__sigismember (newmask, SIGSETXID)))) |
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| 33 | { |
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| 34 | local_newmask = *newmask; |
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| 35 | __clear_internal_signals (set: &local_newmask); |
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| 36 | newmask = &local_newmask; |
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| 37 | } |
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| 38 | |
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| 39 | /* We know that realtime signals are available if NPTL is used. */ |
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| 40 | int result = INTERNAL_SYSCALL_CALL (rt_sigprocmask, how, newmask, |
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| 41 | oldmask, __NSIG_BYTES); |
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| 42 | |
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| 43 | return (INTERNAL_SYSCALL_ERROR_P (result) |
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| 44 | ? INTERNAL_SYSCALL_ERRNO (result) |
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| 45 | : 0); |
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| 46 | } |
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| 47 | libc_hidden_def (__pthread_sigmask) |
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| 48 | |
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| 49 | versioned_symbol (libc, __pthread_sigmask, pthread_sigmask, GLIBC_2_32); |
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| 50 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_32) |
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| 51 | strong_alias (__pthread_sigmask, __pthread_sigmask_2); |
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| 52 | compat_symbol (libc, __pthread_sigmask_2, pthread_sigmask, GLIBC_2_0); |
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| 53 | #endif |
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| 54 | |
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