1 /* $NetBSD: logger.c,v 1.14 2009/04/12 13:53:48 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1983, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)logger.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 __RCSID("$NetBSD: logger.c,v 1.14 2009/04/12 13:53:48 lukem Exp $"); 43 #endif /* not lint */ 44 45 #include <errno.h> 46 #include <unistd.h> 47 #include <stdlib.h> 48 #include <stdio.h> 49 #include <ctype.h> 50 #include <string.h> 51 #include <err.h> 52 53 #define SYSLOG_NAMES 54 #include <syslog.h> 55 56 int decode(const char *, const CODE *); 57 int pencode(char *); 58 int main(int, char **); 59 void usage(void); 60 61 /* 62 * logger -- read and log utility 63 * 64 * Reads from an input and arranges to write the result on the system 65 * log. 66 */ 67 int 68 main(int argc, char *argv[]) 69 { 70 int ch, logflags, pri; 71 const char *tag; 72 const char *sd = "-"; 73 const char *msgid = "-"; 74 char buf[1024]; 75 76 tag = NULL; 77 pri = LOG_NOTICE; 78 logflags = 0; 79 while ((ch = getopt(argc, argv, "d:f:im:p:st:")) != -1) 80 switch((char)ch) { 81 case 'd': /* structured data field */ 82 sd = optarg; 83 break; 84 case 'f': /* file to log */ 85 if (freopen(optarg, "r", stdin) == NULL) 86 err(EXIT_FAILURE, "%s", optarg); 87 break; 88 case 'i': /* log process id also */ 89 logflags |= LOG_PID; 90 break; 91 case 'm': /* msgid field */ 92 msgid = optarg; 93 break; 94 case 'p': /* priority */ 95 pri = pencode(optarg); 96 break; 97 case 's': /* log to standard error */ 98 logflags |= LOG_PERROR; 99 break; 100 case 't': /* tag */ 101 tag = optarg; 102 break; 103 case '?': 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 110 /* setup for logging */ 111 openlog(tag != NULL ? tag : getlogin(), logflags, 0); 112 (void)fclose(stdout); 113 114 /* log input line if appropriate */ 115 if (argc > 0) { 116 char *p, *endp; 117 size_t len; 118 119 for (p = buf, endp = buf + sizeof(buf) - 2; *argv != NULL;) { 120 len = strlen(*argv); 121 if (p + len > endp && p > buf) { 122 syslogp(pri, msgid, sd, "%s", buf); 123 p = buf; 124 } 125 if (len > sizeof(buf) - 1) 126 syslogp(pri, msgid, sd, "%s", *argv++); 127 else { 128 if (p != buf) 129 *p++ = ' '; 130 memmove(p, *argv++, len); 131 *(p += len) = '\0'; 132 } 133 } 134 if (p != buf) 135 syslogp(pri, msgid, sd, "%s", buf); 136 } else /* TODO: allow syslog-protocol messages from file/stdin 137 * but that will require parsing the line to split 138 * it into three fields. 139 */ 140 while (fgets(buf, sizeof(buf), stdin) != NULL) 141 syslogp(pri, msgid, sd, "%s", buf); 142 143 exit(EXIT_SUCCESS); 144 /* NOTREACHED */ 145 } 146 147 /* 148 * Decode a symbolic name to a numeric value 149 */ 150 int 151 pencode(char *s) 152 { 153 char *save; 154 int fac, lev; 155 156 for (save = s; *s != '\0' && *s != '.'; ++s) 157 ; 158 if (*s != '\0') { 159 *s = '\0'; 160 fac = decode(save, facilitynames); 161 if (fac < 0) 162 errx(EXIT_FAILURE, "unknown facility name: %s", save); 163 *s++ = '.'; 164 } else { 165 fac = 0; 166 s = save; 167 } 168 lev = decode(s, prioritynames); 169 if (lev < 0) 170 errx(EXIT_FAILURE, "unknown priority name: %s", s); 171 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); 172 } 173 174 int 175 decode(const char *name, const CODE *codetab) 176 { 177 const CODE *c; 178 179 if (isdigit((unsigned char)*name)) 180 return (atoi(name)); 181 182 for (c = codetab; c->c_name != NULL; c++) 183 if (strcasecmp(name, c->c_name) == 0) 184 return (c->c_val); 185 186 return (-1); 187 } 188 189 void 190 usage(void) 191 { 192 193 (void)fprintf(stderr, 194 "%s: [-is] [-f file] [-p pri] [-t tag] " 195 "[-m msgid] [-d SD] [ message ... ]\n", 196 getprogname()); 197 exit(EXIT_FAILURE); 198 } 199