bcd9302508
also include fallback code for broken kernels that don't support the flags. as usual, the fallback has a race condition that can leak file descriptors.
19 lines
531 B
C
19 lines
531 B
C
#include <sys/signalfd.h>
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#include <signal.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "syscall.h"
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int signalfd(int fd, const sigset_t *sigs, int flags)
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{
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int ret = __syscall(SYS_signalfd4, fd, sigs, _NSIG/8, flags);
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if (ret != -ENOSYS) return __syscall_ret(ret);
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ret = __syscall(SYS_signalfd, fd, sigs, _NSIG/8);
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if (ret >= 0) {
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if (flags & SFD_CLOEXEC)
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__syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
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if (flags & SFD_NONBLOCK)
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__syscall(SYS_fcntl, ret, F_SETFL, O_NONBLOCK);
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}
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return __syscall_ret(ret);
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}
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