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Remove the ugly hack for forcing nl_getifdata() to be synchronous. It now

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properly performs a synchronous wait using poll().
This commit is contained in:
Nicholas J. Kain 2011-07-03 18:10:00 -04:00
parent 01c4731403
commit e4ff1e9261
1 changed files with 8 additions and 6 deletions
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14
ndhc/netlink.c
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@ -31,6 +31,7 @@
#include <fcntl.h>
#include <time.h>
#include <errno.h>
#include <poll.h>
#include "netlink.h"
#include "ifchange.h"
@ -192,12 +193,13 @@ int nl_getifdata(const char *ifname, struct client_state_t *cs)
sizeof addr) == -1)
return -1;
// This is rather ugly, but hey!
if (fcntl(cs->nlFd, F_SETFL, fcntl(cs->nlFd, F_GETFL) & ~O_NONBLOCK) == -1)
suicide("nl_getifdata: failed to remove O_NONBLOCK");
handle_nl_message(cs);
if (fcntl(cs->nlFd, F_SETFL, fcntl(cs->nlFd, F_GETFL) | O_NONBLOCK) == -1)
suicide("nl_getifdata: failed to restore O_NONBLOCK");
for (int pr = 0; !pr;) {
pr = poll(&((struct pollfd){.fd=cs->nlFd,.events=POLLIN}), 1, -1);
if (pr == 1)
handle_nl_message(cs);
else if (pr == -1)
suicide("nl: poll failed");
}
return 0;
}