/* * 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. * * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved. * @(#)logger.c 8.1 (Berkeley) 6/6/93 * $FreeBSD: src/usr.bin/logger/logger.c,v 1.5.2.3 2001/09/06 17:38:57 ru Exp $ * $DragonFly: src/usr.bin/logger/logger.c,v 1.4 2005/02/25 18:08:05 liamfoy Exp $ */ #include #include #include #include #include #include #include #include #include #define SYSLOG_NAMES #include static int decode(const char *, CODE *); static int pencode(char *); static void logmessage(int, const char *, const char *); static void usage(void); struct socks { int sock; int addrlen; struct sockaddr_storage addr; }; #ifdef INET6 int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ #else int family = PF_INET; /* protocol family (IPv4 only) */ #endif int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */ /* * 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, *host, buf[1024]; tag = NULL; host = NULL; pri = LOG_USER | LOG_NOTICE; logflags = 0; unsetenv("TZ"); while ((ch = getopt(argc, argv, "46Af:h:ip:st:")) != -1) switch(ch) { case '4': family = PF_INET; break; #ifdef INET6 case '6': family = PF_INET6; break; #endif case 'A': send_to_all++; break; case 'f': /* file to log */ if (freopen(optarg, "r", stdin) == NULL) err(1, "%s", optarg); break; case 'h': /* hostname to deliver to */ host = 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 '?': default: usage(); } argc -= optind; argv += optind; /* setup for logging */ openlog(tag ? tag : getlogin(), logflags, 0); fclose(stdout); /* log input line if appropriate */ if (argc > 0) { char *p, *endp; size_t len; for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { len = strlen(*argv); if (p + len > endp && p > buf) { logmessage(pri, host, buf); p = buf; } if (len > sizeof(buf) - 1) logmessage(pri, host, *argv++); else { if (p != buf) *p++ = ' '; bcopy(*argv++, p, len); *(p += len) = '\0'; } } if (p != buf) logmessage(pri, host, buf); } else while (fgets(buf, sizeof(buf), stdin) != NULL) logmessage(pri, host, buf); exit(0); } /* * Send the message to syslog, either on the local host, or on a remote host */ static void logmessage(int pri, const char *host, const char *buf) { static struct socks *socks; static int nsock = 0; struct addrinfo hints, *res, *r; char *line; int maxs, len, sock, error, i, lsent = 0; if (host == NULL) { syslog(pri, "%s", buf); return; } if (nsock <= 0) { /* set up socket stuff */ /* resolve hostname */ memset(&hints, 0, sizeof(hints)); hints.ai_family = family; hints.ai_socktype = SOCK_DGRAM; error = getaddrinfo(host, "syslog", &hints, &res); if (error == EAI_SERVICE) { warnx ("syslog/udp: unknown service"); /* not fatal */ error = getaddrinfo(host, "514", &hints, &res); } if (error) errx(1, "%s: %s", gai_strerror(error), host); /* count max number of sockets we may open */ for (maxs = 0, r = res; r; r = r->ai_next, maxs++); socks = malloc(maxs * sizeof(struct socks)); if (!socks) err(1, "couldn't allocate memory for sockets"); for (r = res; r; r = r->ai_next) { sock = socket(r->ai_family, r->ai_socktype, r->ai_protocol); if (sock < 0) continue; memcpy(&socks[nsock].addr, r->ai_addr, r->ai_addrlen); socks[nsock].addrlen = r->ai_addrlen; socks[nsock++].sock = sock; } freeaddrinfo(res); if (nsock <= 0) errx(1, "socket"); } if ((len = asprintf(&line, "<%d>%s", pri, buf)) == -1) errx(1, "asprintf"); for (i = 0; i < nsock; ++i) { lsent = sendto(socks[i].sock, line, len, 0, (struct sockaddr *)&socks[i].addr, socks[i].addrlen); if (lsent == len && !send_to_all) break; } if (lsent != len) warnx("sendmsg"); free(line); } /* * Decode a symbolic name to a numeric value */ 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(1, "unknown facility name: %s", save); *s++ = '.'; } else { fac = 0; s = save; } lev = decode(s, prioritynames); if (lev < 0) errx(1, "unknown priority name: %s", save); return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); } int decode(const char *name, CODE *codetab) { 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 void usage(void) { fprintf(stderr, "usage: %s\n", "logger [-46Ais] [-f file] [-h host] [-p pri] [-t tag] [message ...]"); exit(1); }