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don't fail pthread_sigmask/sigprocmask on invalid how when set is null

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the resolution of Austin Group issue #1132 changes the requirement to
fail so that it only applies when the set argument (new mask) is
non-null. this change was made for consistency with the description,
which specified "if set is a null pointer, the value of the argument
how is not significant".
This commit is contained in:
Rich Felker 2018-12-18 20:01:20 -05:00
parent a63c0104e4
commit 1ec71c531e
1 changed files with 1 additions and 1 deletions
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2
src/thread/pthread_sigmask.c
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@ -5,7 +5,7 @@
int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
{
int ret;
if ((unsigned)how - SIG_BLOCK > 2U) return EINVAL;
if (set && (unsigned)how - SIG_BLOCK > 2U) return EINVAL;
ret = -__syscall(SYS_rt_sigprocmask, how, set, old, _NSIG/8);
if (!ret && old) {
if (sizeof old->__bits[0] == 8) {