diff options
Diffstat (limited to 'libbb/xfuncs.c')
| -rw-r--r-- | libbb/xfuncs.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c index a02a504b0..23f27516f 100644 --- a/libbb/xfuncs.c +++ b/libbb/xfuncs.c @@ -25,19 +25,25 @@ #include "libbb.h" /* Turn on nonblocking I/O on a fd */ -int FAST_FUNC ndelay_on(int fd) +void FAST_FUNC ndelay_on(int fd) { - return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); + int flags = fcntl(fd, F_GETFL); + if (flags & O_NONBLOCK) + return; + fcntl(fd, F_SETFL, flags | O_NONBLOCK); } -int FAST_FUNC ndelay_off(int fd) +void FAST_FUNC ndelay_off(int fd) { - return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_NONBLOCK); + int flags = fcntl(fd, F_GETFL); + if (!(flags & O_NONBLOCK)) + return; + fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); } -int FAST_FUNC close_on_exec_on(int fd) +void FAST_FUNC close_on_exec_on(int fd) { - return fcntl(fd, F_SETFD, FD_CLOEXEC); + fcntl(fd, F_SETFD, FD_CLOEXEC); } char* FAST_FUNC strncpy_IFNAMSIZ(char *dst, const char *src) |