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Teach rdate to timeout in 10 seconds to avoid blocking forever

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with odd or broken networking setups
This commit is contained in:
Eric Andersen 2003-09-12 05:50:51 +00:00
parent f57a614db9
commit e15138a870
1 changed files with 10 additions and 0 deletions
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10
util-linux/rdate.c
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@ -32,11 +32,17 @@
#include <time.h> #include <time.h>
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
#include <signal.h>
#include "busybox.h" #include "busybox.h"
static const int RFC_868_BIAS = 2208988800UL; static const int RFC_868_BIAS = 2208988800UL;
static void socket_timeout()
{
bb_error_msg_and_die("timeout connecting to time server\n");
}
static time_t askremotedate(const char *host) static time_t askremotedate(const char *host)
{ {
unsigned long int nett, localt; unsigned long int nett, localt;
@ -46,6 +52,10 @@ static time_t askremotedate(const char *host)
if (getservbyname("time", "tcp") != NULL) if (getservbyname("time", "tcp") != NULL)
port="time"; port="time";
/* Add a timeout for dead or non accessable servers */
alarm(10);
signal(SIGALRM, socket_timeout);
fd = xconnect(host, port); fd = xconnect(host, port);
if (safe_read(fd, (void *)&nett, 4) != 4) /* read time from server */ if (safe_read(fd, (void *)&nett, 4) != 4) /* read time from server */