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Use MSG_NOSIGNAL if SOCK_NOSIGPIPE not available #3

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Use MSG_NOSIGNAL if SOCK_NOSIGPIPE not available #3

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9cdd9c2
Use MSG_NOSIGNAL if SOCK_NOSIGPIPE not available
nicowilliams May 15, 2017
bd12691
fixup: less #ifdef clutter??
nicowilliams May 16, 2017
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13 changes: 13 additions & 0 deletions lib/libknc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2250,6 +2250,18 @@ fdwritev(void *cookie, const struct iovec *iov, int iovcnt)

#ifdef O_NOSIGPIPE
return writev(fd, iov, iovcnt);
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We could just always use sendmsg(2) and reduce the amount of #ifdef mess by a teeny bit.

#else
#ifdef MSG_NOSIGNAL
struct msghdr msg = { 0 };

msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = (void *)(uintptr_t)iov;
msg.msg_iovlen = iovcnt;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
return sendmsg(fd, &msg, MSG_NOSIGNAL);
#else
struct timespec ts_zero = {0, 0};
sigset_t blocked;
Expand Down Expand Up @@ -2293,6 +2305,7 @@ fdwritev(void *cookie, const struct iovec *iov, int iovcnt)
errno = my_errno;
return ret;
#endif
#endif
}

static int
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