Hi,
I hope you will find the following patch useful.
It adds the ability to logger to log a message to a udp socket.
The -n option followed by the hostname of the remote host is mandatory
to do this.
The optional -P option can be used to change the UDP destination port
(default 514).
The function udpopenlog is used to open the udp socket. After that
everything works in almost the same way like it does when logging to a
UNIX socket.
Signed-off-by: Josef Wuebbels <josef.wuebbels@xxxxxx>
--- a/misc-utils/logger.c 2010-11-30 11:26:31.000000000 +0100
+++ b/misc-utils/logger.c 2011-01-17 07:56:43.194540015 +0100
@@ -47,6 +47,8 @@
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
+#include <arpa/inet.h>
+#include <netdb.h>
#include "nls.h"
#define SYSLOG_NAMES
@@ -57,6 +59,7 @@
void usage __P((void));
static int optd = 0;
+static int udpport = 514;
static int
myopenlog(const char *sock) {
@@ -83,6 +86,32 @@
return fd;
}
+static int
+udpopenlog(const char *servername,int port) {
+ int fd;
+ struct sockaddr_in s_addr;
+ struct hostent *serverhost;
+
+ if ((serverhost = gethostbyname(servername)) == NULL ){
+ printf (_("unable to resolve '%s'\n"), servername);
+ exit(1);
+ }
+
+ if ((fd = socket(AF_INET, SOCK_DGRAM , 0)) == -1) {
+ printf (_("socket: %s.\n"), strerror(errno));
+ exit (1);
+ }
+
+ bcopy(serverhost->h_addr,&s_addr.sin_addr,serverhost->h_length);
+ s_addr.sin_family=AF_INET;
+ s_addr.sin_port=htons(port);
+
+ if (connect(fd, (struct sockaddr *) &s_addr, sizeof(s_addr)) ==
-1) {
+ printf (_("connect: %s.\n"), strerror(errno));
+ exit(1);
+ }
+ return fd;
+}
static void
mysyslog(int fd, int logflags, int pri, char *tag, char *msg) {
char buf[1000], pid[30], *cp, *tp;
@@ -122,6 +151,7 @@
int ch, logflags, pri;
char *tag, buf[1024];
char *usock = NULL;
+ char *udpserver = NULL;
int LogSock = -1;
setlocale(LC_ALL, "");
@@ -131,7 +161,7 @@
tag = NULL;
pri = LOG_NOTICE;
logflags = 0;
- while ((ch = getopt(argc, argv, "f:ip:st:u:d")) != -1)
+ while ((ch = getopt(argc, argv, "f:ip:st:u:dn:P:")) != -1)
switch((char)ch) {
case 'f': /* file to log */
if (freopen(optarg, "r", stdin) == NULL) {
@@ -159,6 +189,13 @@
case 'd':
optd = 1; /* use datagrams */
break;
+ case 'n': /* udp socket */
+ optd = 1; /* use datagrams because udp */
+ udpserver = optarg;
+ break;
+ case 'P': /* change udp port */
+ udpport = atoi(optarg);
+ break;
case '?':
default:
usage();
@@ -167,8 +204,10 @@
argv += optind;
/* setup for logging */
- if (!usock)
+ if (!usock && !udpserver)
openlog(tag ? tag : getlogin(), logflags, 0);
+ else if (udpserver)
+ LogSock = udpopenlog(udpserver,udpport);
else
LogSock = myopenlog(usock);
@@ -182,14 +221,14 @@
for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
len = strlen(*argv);
if (p + len > endp && p > buf) {
- if (!usock)
+ if (!usock && !udpserver)
syslog(pri, "%s", buf);
else
mysyslog(LogSock, logflags, pri, tag,
buf);
p = buf;
}
if (len > sizeof(buf) - 1) {
- if (!usock)
+ if (!usock && !udpserver)
syslog(pri, "%s", *argv++);
else
mysyslog(LogSock, logflags, pri, tag,
*argv++);
@@ -201,7 +240,7 @@
}
}
if (p != buf) {
- if (!usock)
+ if (!usock && !udpserver)
syslog(pri, "%s", buf);
else
mysyslog(LogSock, logflags, pri, tag, buf);
@@ -215,12 +254,12 @@
if (len > 0 && buf[len - 1] == '\n')
buf[len - 1] = '\0';
- if (!usock)
+ if (!usock && !udpserver)
syslog(pri, "%s", buf);
else
mysyslog(LogSock, logflags, pri, tag, buf);
}
- if (!usock)
+ if (!usock && !udpserver)
closelog();
else
close(LogSock);
@@ -282,6 +321,6 @@
usage()
{
(void)fprintf(stderr,
- _("usage: logger [-is] [-f file] [-p pri] [-t tag] [-u
socket] [ message ... ]\n"));
+ _("usage: logger [-is] [-f file] [-p pri] [-t tag] [-u
socket] [-n udpserver] [-P udpport] [ message ... ]\n"));
exit(1);
}
---
Best regards
Josef Wuebbels
MTU Aero Engines GmbH
Dachauer Str. 665
80995 Muenchen
Germany
http://www.mtu.de
--
MTU Aero Engines GmbH
Geschaeftsfuehrung/Board of Management: Egon W. Behle, Vorsitzender/CEO; Dr. Rainer Martens, Dr. Stefan Weingartner, Reiner Winkler
Vorsitzender des Aufsichtsrats/Chairman of the Supervisory Board: Klaus Eberhardt
Sitz der Gesellschaft/Registered Office: Muenchen
Handelsregister/Commercial Register: Muenchen HRB 154230
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