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/* nanoklogd - forward kernel messages to /dev/log. */
/* Written by Leah Neukirchen <leah@vuxu.org>
To the extent possible under law, the creator of this work has waived
all copyright and related or neighboring rights to this work. */
/* This uses /dev/log directly because glibc syslog(3) does
forward LOG_KERN as LOG_USER. */
#include <sys/klog.h>
#include <sys/socket.h>
#include <errno.h>
#include <unistd.h>
static const struct {
short sun_family;
char sun_path[9];
} log_addr = {
AF_UNIX,
"/dev/log"
};
int
main(int argc, char *argv[]) {
char buf[16384];
int f, l, start, stop;
f = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
if (f < 0)
return 111;
if (connect(f, (void *)&log_addr, sizeof log_addr) < 0)
return 112;
while (1) {
l = klogctl(2, buf, sizeof buf);
if (l < 0)
return 113;
for (start = 0; start < l; start = stop+1) {
for (stop = start+1; stop < l && buf[stop] != '\n'; stop++)
;
while (send(f, buf+start, stop-start, 0) != stop-start) {
switch (errno) {
case ECONNREFUSED:
case ECONNRESET:
case ENOTCONN:
/* syslogd went down, retry until up. */
close(f);
sleep(1);
f = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
if (f < 0)
return 111;
connect(f, (void *)&log_addr, sizeof log_addr);
break;
default:
return 114;
}
}
}
}
return 0;
}
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