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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2014-12-21 01:11:18 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2014-12-21 01:11:18 +0000 |
| commit | 4557dacfbe04206c57e459b734016d2b6edfe7f3 (patch) | |
| tree | 8275bbbbb77095c079bd9e94e00ac91129d3d481 | |
| parent | 23bdcb4ad4ef19d99b729e5282fd15df6300a3b5 (diff) | |
| download | skalibs-4557dacfbe04206c57e459b734016d2b6edfe7f3.tar.xz | |
Stricter trynbwaitall to actually catch the problems
| -rw-r--r-- | src/sysdeps/trynbwaitall.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/sysdeps/trynbwaitall.c b/src/sysdeps/trynbwaitall.c index 0f55080..ae79f1c 100644 --- a/src/sysdeps/trynbwaitall.c +++ b/src/sysdeps/trynbwaitall.c @@ -27,6 +27,11 @@ #define MSG_NOSIGNAL 0 #endif +#ifndef MSG_DONTWAIT +#define MSG_DONTWAIT 0 +#endif + + static int ndelay_on (int fd) { register int got = fcntl(fd, F_GETFL) ; @@ -35,8 +40,8 @@ static int ndelay_on (int fd) static int child (int p, int fd) { - char c ; - struct iovec v = { .iov_base = &c, .iov_len = 1 } ; + char buf[8] ; + struct iovec v = { .iov_base = buf, .iov_len = 8 } ; struct msghdr msg = { .msg_name = 0, @@ -56,7 +61,7 @@ static int child (int p, int fd) /* The following recvmsg may block, despite setting the fd non-blocking. That is what we're testing. */ - if (recvmsg(fd, &msg, MSG_WAITALL) < 1) return 111 ; + if (recvmsg(fd, &msg, MSG_WAITALL | MSG_DONTWAIT) < 1) return 111 ; if (write(p, "", 1) < 1) return 111 ; return 0 ; } |