Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
402 lines
9.4 KiB
C
402 lines
9.4 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <ctype.h>
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#include <err.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define SYSLOG_NAMES
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#include <syslog.h>
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#define sstosa(ss) ((struct sockaddr *)(void *)ss)
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struct socks {
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int sk_sock;
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int sk_addrlen;
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struct sockaddr_storage sk_addr;
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};
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static int decode(char *, const CODE *);
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static int pencode(char *);
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static ssize_t socksetup(const char *, const char *, const char *,
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struct socks **);
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static void logmessage(int, const char *, struct socks *, ssize_t,
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const char *);
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static void usage(void);
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#ifdef INET6
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static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
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#else
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static int family = PF_INET; /* protocol family (IPv4 only) */
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#endif
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static int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */
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/*
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* logger -- read and log utility
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*
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* Reads from an input and arranges to write the result on the system
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* log.
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*/
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int
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main(int argc, char *argv[])
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{
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struct socks *socks;
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ssize_t nsock;
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int ch, logflags, pri;
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char *tag, *host, buf[1024];
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const char *svcname, *src;
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tag = NULL;
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host = NULL;
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svcname = "syslog";
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src = NULL;
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socks = NULL;
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pri = LOG_USER | LOG_NOTICE;
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logflags = 0;
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unsetenv("TZ");
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while ((ch = getopt(argc, argv, "46Af:h:iP:p:S:st:")) != -1)
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switch((char)ch) {
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case '4':
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family = PF_INET;
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break;
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#ifdef INET6
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case '6':
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family = PF_INET6;
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break;
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#endif
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case 'A':
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send_to_all++;
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break;
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case 'f': /* file to log */
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if (freopen(optarg, "r", stdin) == NULL)
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err(1, "%s", optarg);
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setvbuf(stdin, 0, _IONBF, 0);
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break;
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case 'h': /* hostname to deliver to */
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host = optarg;
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break;
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case 'i': /* log process id also */
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logflags |= LOG_PID;
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break;
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case 'P': /* service name or port number */
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svcname = optarg;
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break;
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case 'p': /* priority */
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pri = pencode(optarg);
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break;
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case 's': /* log to standard error */
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logflags |= LOG_PERROR;
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break;
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case 'S': /* source address */
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src = optarg;
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break;
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case 't': /* tag */
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tag = optarg;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (host) {
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nsock = socksetup(src, host, svcname, &socks);
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if (nsock <= 0)
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errx(1, "socket");
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} else {
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if (src)
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errx(1, "-h option is missing.");
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nsock = 0;
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}
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if (tag == NULL)
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tag = getlogin();
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/* setup for logging */
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if (host == NULL)
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openlog(tag, logflags, 0);
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(void) fclose(stdout);
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/* log input line if appropriate */
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if (argc > 0) {
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char *p, *endp;
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size_t len;
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for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
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len = strlen(*argv);
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if (p + len > endp && p > buf) {
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logmessage(pri, tag, socks, nsock, buf);
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p = buf;
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}
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if (len > sizeof(buf) - 1)
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logmessage(pri, tag, socks, nsock, *argv++);
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else {
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if (p != buf)
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*p++ = ' ';
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bcopy(*argv++, p, len);
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*(p += len) = '\0';
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}
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}
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if (p != buf)
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logmessage(pri, tag, socks, nsock, buf);
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} else
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while (fgets(buf, sizeof(buf), stdin) != NULL)
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logmessage(pri, tag, socks, nsock, buf);
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exit(0);
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}
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static ssize_t
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socksetup(const char *src, const char *dst, const char *svcname,
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struct socks **socks)
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{
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struct addrinfo hints, *res, *res0;
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struct sockaddr_storage *ss_src[AF_MAX];
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struct socks *sk;
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ssize_t nsock = 0;
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int error, maxs;
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memset(&ss_src[0], 0, sizeof(ss_src));
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if (src) {
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char *p, *p0, *hs, *hbuf, *sbuf;
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hbuf = sbuf = NULL;
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p0 = p = strdup(src);
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if (p0 == NULL)
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err(1, "strdup failed");
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hs = p0; /* point to search ":" */
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#ifdef INET6
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/* -S option supports IPv6 addr in "[2001:db8::1]:service". */
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if (*p0 == '[') {
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p = strchr(p0, ']');
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if (p == NULL)
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errx(1, "\"]\" not found in src addr");
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*p = '\0';
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/* hs points just after ']' (':' or '\0'). */
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hs = p + 1;
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/*
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* p points just after '[' while it points hs
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* in the case of [].
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*/
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p = ((p0 + 1) == (hs - 1)) ? hs : p0 + 1;
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}
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#endif
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if (*p != '\0') {
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/* (p == hs) means ":514" or "[]:514". */
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hbuf = (p == hs && *p == ':') ? NULL : p;
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p = strchr(hs, ':');
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if (p != NULL) {
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*p = '\0';
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sbuf = (*(p + 1) != '\0') ? p + 1 : NULL;
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}
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}
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hints = (struct addrinfo){
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.ai_family = family,
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.ai_socktype = SOCK_DGRAM,
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.ai_flags = AI_PASSIVE
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};
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error = getaddrinfo(hbuf, sbuf, &hints, &res0);
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if (error)
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errx(1, "%s: %s", gai_strerror(error), src);
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for (res = res0; res; res = res->ai_next) {
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switch (res->ai_family) {
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case AF_INET:
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#ifdef INET6
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case AF_INET6:
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#endif
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if (ss_src[res->ai_family] != NULL)
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continue;
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ss_src[res->ai_family] =
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malloc(sizeof(struct sockaddr_storage));
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if (ss_src[res->ai_family] == NULL)
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err(1, "malloc failed");
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memcpy(ss_src[res->ai_family], res->ai_addr,
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res->ai_addrlen);
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}
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}
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freeaddrinfo(res0);
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free(p0);
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}
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/* resolve hostname */
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hints = (struct addrinfo){
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.ai_family = family,
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.ai_socktype = SOCK_DGRAM
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};
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error = getaddrinfo(dst, svcname, &hints, &res0);
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if (error == EAI_SERVICE) {
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warnx("%s/udp: unknown service", svcname);
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error = getaddrinfo(dst, "514", &hints, &res);
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}
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if (error)
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errx(1, "%s: %s", gai_strerror(error), dst);
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/* count max number of sockets we may open */
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maxs = 0;
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for (res = res0; res; res = res->ai_next)
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maxs++;
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sk = calloc(maxs, sizeof(*sk));
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if (sk == NULL)
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errx(1, "couldn't allocate memory for sockets");
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for (res = res0; res; res = res->ai_next) {
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int s;
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s = socket(res->ai_family, res->ai_socktype,
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res->ai_protocol);
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if (s < 0)
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continue;
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if (src && ss_src[res->ai_family] == NULL)
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errx(1, "address family mismatch");
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if (ss_src[res->ai_family]) {
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error = bind(s, sstosa(ss_src[res->ai_family]),
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ss_src[res->ai_family]->ss_len);
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if (error < 0)
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err(1, "bind");
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}
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sk[nsock] = (struct socks){
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.sk_addrlen = res->ai_addrlen,
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.sk_sock = s
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};
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memcpy(&sk[nsock].sk_addr, res->ai_addr, res->ai_addrlen);
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nsock++;
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}
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freeaddrinfo(res0);
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*socks = sk;
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return (nsock);
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}
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/*
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* Send the message to syslog, either on the local host, or on a remote host
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*/
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static void
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logmessage(int pri, const char *tag, struct socks *sk, ssize_t nsock,
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const char *buf)
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{
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char *line;
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int len, i, lsent;
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if (nsock == 0) {
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syslog(pri, "%s", buf);
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return;
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}
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if ((len = asprintf(&line, "<%d>%s: %s", pri, tag, buf)) == -1)
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errx(1, "asprintf");
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lsent = -1;
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for (i = 0; i < nsock; i++) {
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lsent = sendto(sk[i].sk_sock, line, len, 0,
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sstosa(&sk[i].sk_addr), sk[i].sk_addrlen);
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if (lsent == len && !send_to_all)
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break;
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}
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if (lsent != len) {
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if (lsent == -1)
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warn("sendto");
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else
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warnx("sendto: short send - %d bytes", lsent);
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}
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free(line);
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}
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/*
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* Decode a symbolic name to a numeric value
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*/
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static int
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pencode(char *s)
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{
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char *save;
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int fac, lev;
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for (save = s; *s && *s != '.'; ++s);
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if (*s) {
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*s = '\0';
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fac = decode(save, facilitynames);
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if (fac < 0)
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errx(1, "unknown facility name: %s", save);
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*s++ = '.';
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}
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else {
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fac = 0;
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s = save;
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}
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lev = decode(s, prioritynames);
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if (lev < 0)
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errx(1, "unknown priority name: %s", save);
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return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
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}
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static int
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decode(char *name, const CODE *codetab)
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{
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const CODE *c;
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if (isdigit(*name))
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return (atoi(name));
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for (c = codetab; c->c_name; c++)
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if (!strcasecmp(name, c->c_name))
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return (c->c_val);
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return (-1);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: %s\n",
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"logger [-46Ais] [-f file] [-h host] [-P port] [-p pri] [-t tag]\n"
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" [-S addr:port] [message ...]"
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);
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exit(1);
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}
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