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streamline old-kernel fallback path of pipe2 to use syscalls directly

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also, don't waste code/time on F_GETFL since pipes always have blank
flags initially (at least on old kernels, which are all this fallback
code matters for).
This commit is contained in:
Rich Felker 2013-02-03 16:09:05 -05:00
commit 89d3df6e54
1 changed files with 4 additions and 4 deletions
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8
src/unistd/pipe2.c
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@ -11,12 +11,12 @@ int pipe2(int fd[2], int flag)
ret = __syscall(SYS_pipe, fd); ret = __syscall(SYS_pipe, fd);
if (ret) return __syscall_ret(ret); if (ret) return __syscall_ret(ret);
if (flag & O_CLOEXEC) { if (flag & O_CLOEXEC) {
fcntl(fd[0], F_SETFD, FD_CLOEXEC); __syscall(SYS_fcntl, fd[0], F_SETFD, FD_CLOEXEC);
fcntl(fd[1], F_SETFD, FD_CLOEXEC); __syscall(SYS_fcntl, fd[1], F_SETFD, FD_CLOEXEC);
} }
if (flag & O_NONBLOCK) { if (flag & O_NONBLOCK) {
fcntl(fd[0], F_SETFL, fcntl(fd[0], F_GETFL) | O_NONBLOCK); __syscall(SYS_fcntl, fd[0], F_SETFL, O_NONBLOCK);
fcntl(fd[1], F_SETFL, fcntl(fd[1], F_GETFL) | O_NONBLOCK); __syscall(SYS_fcntl, fd[1], F_SETFL, O_NONBLOCK);
} }
return 0; return 0;
} }