/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
* Sun Mar 21 1999 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
* - fixed strerr(errno) in gettext calls
*/
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <getopt.h>
#include "c.h"
#include "closestream.h"
#include "nls.h"
#include "strutils.h"
#define SYSLOG_NAMES
#include <syslog.h>
static int decode(char *name, CODE *codetab)
{
register CODE *c;
if (isdigit(*name))
return (atoi(name));
for (c = codetab; c->c_name; c++)
if (!strcasecmp(name, c->c_name))
return (c->c_val);
return -1;
}
static int pencode(char *s)
{
char *save;
int fac, lev;
for (save = s; *s && *s != '.'; ++s);
if (*s) {
*s = '\0';
fac = decode(save, facilitynames);
if (fac < 0)
errx(EXIT_FAILURE, _("unknown facility name: %s."), save);
*s++ = '.';
}
else {
fac = LOG_USER;
s = save;
}
lev = decode(s, prioritynames);
if (lev < 0)
errx(EXIT_FAILURE, _("unknown priority name: %s."), save);
return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
}
static int
myopenlog(const char *sock, int optd)
{
int fd;
static struct sockaddr_un s_addr; /* AF_UNIX address of local logger */
if (strlen(sock) >= sizeof(s_addr.sun_path))
errx(EXIT_FAILURE, _("openlog %s: pathname too long"), sock);
s_addr.sun_family = AF_UNIX;
(void)strcpy(s_addr.sun_path, sock);
if (optd == 0) {
if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
goto udp_socket;
if (connect(fd, (struct sockaddr *)&s_addr, sizeof(s_addr)) == -1) {
close(fd);
goto udp_socket;
}
} else {
udp_socket:
if ((fd = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1)
err(EXIT_FAILURE, _("socket %s"), sock);
if (connect(fd, (struct sockaddr *)&s_addr, sizeof(s_addr)) == -1)
err(EXIT_FAILURE, _("connect %s"), sock);
}
return fd;
}
static int
udpopenlog(const char *servername, const char *port) {
int fd, errcode;
struct addrinfo hints, *res;
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_DGRAM;
hints.ai_family = AF_UNSPEC;
errcode = getaddrinfo(servername, port, &hints, &res);
if (errcode != 0)
errx(EXIT_FAILURE, _("getaddrinfo %s:%s: %s"), servername, port,
gai_strerror(errcode));
if ((fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1)
err(EXIT_FAILURE, _("socket"));
if (connect(fd, res->ai_addr, res->ai_addrlen) == -1)
err(EXIT_FAILURE, _("connect"));
freeaddrinfo(res);
return fd;
}
static void
mysyslog(int fd, int logflags, int pri, char *tag, char *msg) {
char buf[1000], pid[30], *cp, *tp;
time_t now;
if (fd > -1) {
if (logflags & LOG_PID)
snprintf (pid, sizeof(pid), "[%d]", getpid());
else
pid[0] = 0;
if (tag)
cp = tag;
else {
cp = getlogin();
if (!cp)
cp = "<someone>";
}
(void)time(&now);
tp = ctime(&now)+4;
snprintf(buf, sizeof(buf), "<%d>%.15s %.200s%s: %.400s",
pri, tp, cp, pid, msg);
if (write(fd, buf, strlen(buf)+1) < 0)
return; /* error */
}
}
static void __attribute__ ((__noreturn__)) usage(FILE *out)
{
fputs(_("\nUsage:\n"), out);
fprintf(out,
_(" %s [options] [message]\n"), program_invocation_short_name);
fputs(_("\nOptions:\n"), out);
fputs(_(" -d, --udp use UDP (TCP is default)\n"
" -i, --id log the process ID too\n"
" -f, --file <file> log the contents of this file\n"
" -h, --help display this help text and exit\n"), out);
fputs(_(" -n, --server <name> write to this remote syslog server\n"
" -P, --port <number> use this UDP port\n"
" -p, --priority <prio> mark given message with this priority\n"
" -s, --stderr output message to standard error as well\n"), out);
fputs(_(" -t, --tag <tag> mark every line with this tag\n"
" -u, --socket <socket> write to this Unix socket\n"
" -V, --version output version information and exit\n\n"), out);
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
/*
* logger -- read and log utility
*
* Reads from an input and arranges to write the result on the system
* log.
*/
int
main(int argc, char **argv) {
int ch, logflags, pri;
char *tag, buf[1024];
char *usock = NULL;
char *udpserver = NULL;
char *udpport = NULL;
int LogSock = -1, optd = 0;
static const struct option longopts[] = {
{ "id", no_argument, 0, 'i' },
{ "stderr", no_argument, 0, 's' },
{ "file", required_argument, 0, 'f' },
{ "priority", required_argument, 0, 'p' },
{ "tag", required_argument, 0, 't' },
{ "socket", required_argument, 0, 'u' },
{ "udp", no_argument, 0, 'd' },
{ "server", required_argument, 0, 'n' },
{ "port", required_argument, 0, 'P' },
{ "version", no_argument, 0, 'V' },
{ "help", no_argument, 0, 'h' },
{ NULL, 0, 0, 0 }
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
tag = NULL;
pri = LOG_NOTICE;
logflags = 0;
while ((ch = getopt_long(argc, argv, "f:ip:st:u:dn:P:Vh",
longopts, NULL)) != -1) {
switch((char)ch) {
case 'f': /* file to log */
if (freopen(optarg, "r", stdin) == NULL)
err(EXIT_FAILURE, _("file %s"),
optarg);
break;
case 'i': /* log process id also */
logflags |= LOG_PID;
break;
case 'p': /* priority */
pri = pencode(optarg);
break;
case 's': /* log to standard error */
logflags |= LOG_PERROR;
break;
case 't': /* tag */
tag = optarg;
break;
case 'u': /* unix socket */
usock = optarg;
break;
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 = optarg;
break;
case 'V':
printf(UTIL_LINUX_VERSION);
exit(EXIT_SUCCESS);
case 'h':
usage(stdout);
case '?':
default:
usage(stderr);
}
}
argc -= optind;
argv += optind;
/* setup for logging */
if (!usock && !udpserver)
openlog(tag ? tag : getlogin(), logflags, 0);
else if (udpserver)
LogSock = udpopenlog(udpserver,udpport);
else
LogSock = myopenlog(usock, optd);
/* log input line if appropriate */
if (argc > 0) {
register char *p, *endp;
size_t len;
for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
len = strlen(*argv);
if (p + len > endp && p > buf) {
if (!usock && !udpserver)
syslog(pri, "%s", buf);
else
mysyslog(LogSock, logflags, pri, tag, buf);
p = buf;
}
if (len > sizeof(buf) - 1) {
if (!usock && !udpserver)
syslog(pri, "%s", *argv++);
else
mysyslog(LogSock, logflags, pri, tag, *argv++);
} else {
if (p != buf)
*p++ = ' ';
memmove(p, *argv++, len);
*(p += len) = '\0';
}
}
if (p != buf) {
if (!usock && !udpserver)
syslog(pri, "%s", buf);
else
mysyslog(LogSock, logflags, pri, tag, buf);
}
} else {
while (fgets(buf, sizeof(buf), stdin) != NULL) {
/* glibc is buggy and adds an additional newline,
so we have to remove it here until glibc is fixed */
int len = strlen(buf);
if (len > 0 && buf[len - 1] == '\n')
buf[len - 1] = '\0';
if (!usock && !udpserver)
syslog(pri, "%s", buf);
else
mysyslog(LogSock, logflags, pri, tag, buf);
}
}
if (!usock && !udpserver)
closelog();
else
close(LogSock);
return EXIT_SUCCESS;
}
