mirror of
https://github.com/fluencelabs/musl
synced 2025-06-30 07:02:41 +00:00
40bd1726b6
this fix is necessary because a program could be started with some of the implementation-reserved signals masked (e.g. due to exec having been called from a signal handler, or from a non-musl program) and then could obtain an invalid-to-use-later sigset_t as the old/saved signal mask.
21 lines
438 B
C
21 lines
438 B
C
#include <signal.h>
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#include <errno.h>
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#include <pthread.h>
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#include "syscall.h"
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int pthread_sigmask(int how, const sigset_t *set, sigset_t *old)
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{
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int ret;
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if (how > 2U) return EINVAL;
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ret = -__syscall(SYS_rt_sigprocmask, how, set, old, 8);
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if (!ret && old) {
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if (sizeof old->__bits[0] == 8) {
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old->__bits[0] &= ~0x380000000ULL;
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} else {
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old->__bits[0] &= ~0x80000000UL;
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old->__bits[1] &= ~0x3UL;
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}
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}
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return ret;
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}
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