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make epoll_[p]wait a cancellation point

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this is a Linux-specific function and not covered by POSIX's
requirements for which interfaces are cancellation points, but glibc
makes it one and existing software relies on it being one.

at some point a review for similar functions that should be made
cancellation points should be done.
This commit is contained in:
Rich Felker 2021-04-03 21:16:41 -04:00
parent 521b4d27a0
commit 2c00f95c1a
1 changed files with 2 additions and 2 deletions
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4
src/linux/epoll.c
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@ -24,9 +24,9 @@ int epoll_ctl(int fd, int op, int fd2, struct epoll_event *ev)
int epoll_pwait(int fd, struct epoll_event *ev, int cnt, int to, const sigset_t *sigs)
{
int r = __syscall(SYS_epoll_pwait, fd, ev, cnt, to, sigs, _NSIG/8);
int r = __syscall_cp(SYS_epoll_pwait, fd, ev, cnt, to, sigs, _NSIG/8);
#ifdef SYS_epoll_wait
if (r==-ENOSYS && !sigs) r = __syscall(SYS_epoll_wait, fd, ev, cnt, to);
if (r==-ENOSYS && !sigs) r = __syscall_cp(SYS_epoll_wait, fd, ev, cnt, to);
#endif
return __syscall_ret(r);
}