blob: d32ccaaf34e936213dd3a9dcb8469dc1538d43b8 [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersen3843e961999-11-25 07:30:46 +00002/*
3 * Mini logger implementation for busybox
4 *
Erik Andersen61677fe2000-04-13 01:18:56 +00005 * Copyright (C) 1999,2000 by Lineo, inc.
Eric Andersen3843e961999-11-25 07:30:46 +00006 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include "internal.h"
25#include <stdio.h>
Eric Andersen3843e961999-11-25 07:30:46 +000026#include <unistd.h>
Eric Andersen3843e961999-11-25 07:30:46 +000027#include <sys/types.h>
28#include <sys/stat.h>
29#include <fcntl.h>
Eric Andersen3843e961999-11-25 07:30:46 +000030#include <ctype.h>
Eric Andersen3843e961999-11-25 07:30:46 +000031
32#if !defined BB_SYSLOGD
33
34#define SYSLOG_NAMES
35#include <sys/syslog.h>
36
37#else
38/* We have to do this since the header file defines static
39 * structues. Argh.... bad libc, bad, bad...
40 */
41#include <sys/syslog.h>
42typedef struct _code {
Erik Andersene49d5ec2000-02-08 19:58:47 +000043 char *c_name;
44 int c_val;
Eric Andersen3843e961999-11-25 07:30:46 +000045} CODE;
46extern CODE prioritynames[];
47extern CODE facilitynames[];
48#endif
49
50static const char logger_usage[] =
Erik Andersen7ab9c7e2000-05-12 19:41:47 +000051 "logger [OPTION]... [MESSAGE]\n"
52#ifndef BB_FEATURE_TRIVIAL_HELP
53 "\nWrite MESSAGE to the system log. If MESSAGE is '-', log stdin.\n\n"
Erik Andersene49d5ec2000-02-08 19:58:47 +000054 "Options:\n"
55 "\t-s\tLog to stderr as well as the system log.\n"
56 "\t-t\tLog using the specified tag (defaults to user name).\n"
57
58 "\t-p\tEnter the message with the specified priority.\n"
Erik Andersen7ab9c7e2000-05-12 19:41:47 +000059 "\t\tThis may be numerical or a ``facility.level'' pair.\n"
60#endif
61 ;
Eric Andersen3843e961999-11-25 07:30:46 +000062
63
64/* Decode a symbolic name to a numeric value
65 * this function is based on code
66 * Copyright (c) 1983, 1993
67 * The Regents of the University of California. All rights reserved.
68 */
Erik Andersene49d5ec2000-02-08 19:58:47 +000069static int decode(char *name, CODE * codetab)
Eric Andersen3843e961999-11-25 07:30:46 +000070{
Erik Andersene49d5ec2000-02-08 19:58:47 +000071 CODE *c;
Eric Andersen3843e961999-11-25 07:30:46 +000072
Erik Andersene49d5ec2000-02-08 19:58:47 +000073 if (isdigit(*name))
74 return (atoi(name));
75 for (c = codetab; c->c_name; c++) {
76 if (!strcasecmp(name, c->c_name)) {
77 return (c->c_val);
78 }
Eric Andersen3843e961999-11-25 07:30:46 +000079 }
Eric Andersen3843e961999-11-25 07:30:46 +000080
Erik Andersene49d5ec2000-02-08 19:58:47 +000081 return (-1);
Eric Andersen3843e961999-11-25 07:30:46 +000082}
83
84/* Decode a symbolic name to a numeric value
85 * this function is based on code
86 * Copyright (c) 1983, 1993
87 * The Regents of the University of California. All rights reserved.
88 */
Erik Andersene49d5ec2000-02-08 19:58:47 +000089static int pencode(char *s)
Eric Andersen3843e961999-11-25 07:30:46 +000090{
Erik Andersene49d5ec2000-02-08 19:58:47 +000091 char *save;
92 int lev, fac = LOG_USER;
Eric Andersen3843e961999-11-25 07:30:46 +000093
Erik Andersene49d5ec2000-02-08 19:58:47 +000094 for (save = s; *s && *s != '.'; ++s);
95 if (*s) {
96 *s = '\0';
97 fac = decode(save, facilitynames);
98 if (fac < 0) {
99 fprintf(stderr, "unknown facility name: %s\n", save);
100 exit(FALSE);
101 }
102 *s++ = '.';
103 } else {
104 s = save;
Eric Andersen3843e961999-11-25 07:30:46 +0000105 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000106 lev = decode(s, prioritynames);
107 if (lev < 0) {
108 fprintf(stderr, "unknown priority name: %s\n", save);
109 exit(FALSE);
110 }
111 return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
Eric Andersen3843e961999-11-25 07:30:46 +0000112}
113
114
115extern int logger_main(int argc, char **argv)
116{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000117 int pri = LOG_USER | LOG_NOTICE;
118 int option = 0;
119 int fromStdinFlag = FALSE;
120 int stopLookingAtMeLikeThat = FALSE;
Eric Andersenb6106152000-06-19 17:25:40 +0000121 char *message=NULL, buf[1024], name[128];
Eric Andersen3843e961999-11-25 07:30:46 +0000122
Erik Andersene49d5ec2000-02-08 19:58:47 +0000123 /* Fill out the name string early (may be overwritten later */
124 my_getpwuid(name, geteuid());
Eric Andersen3843e961999-11-25 07:30:46 +0000125
Erik Andersene49d5ec2000-02-08 19:58:47 +0000126 /* Parse any options */
127 while (--argc > 0 && **(++argv) == '-') {
128 if (*((*argv) + 1) == '\0') {
129 fromStdinFlag = TRUE;
130 }
131 stopLookingAtMeLikeThat = FALSE;
132 while (*(++(*argv)) && stopLookingAtMeLikeThat == FALSE) {
133 switch (**argv) {
134 case 's':
135 option |= LOG_PERROR;
136 break;
137 case 'p':
138 if (--argc == 0) {
139 usage(logger_usage);
140 }
141 pri = pencode(*(++argv));
142 stopLookingAtMeLikeThat = TRUE;
143 break;
144 case 't':
145 if (--argc == 0) {
146 usage(logger_usage);
147 }
148 strncpy(name, *(++argv), sizeof(name));
149 stopLookingAtMeLikeThat = TRUE;
150 break;
151 default:
152 usage(logger_usage);
153 }
154 }
Eric Andersen3843e961999-11-25 07:30:46 +0000155 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000156
157 if (fromStdinFlag == TRUE) {
158 /* read from stdin */
159 int c, i = 0;
160
161 while ((c = getc(stdin)) != EOF && i < sizeof(buf)) {
162 buf[i++] = c;
163 }
164 message = buf;
Eric Andersenbefda6e1999-11-25 08:06:22 +0000165 } else {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000166 if (argc >= 1) {
167 message = *argv;
168 } else {
169 fprintf(stderr, "No message\n");
170 exit(FALSE);
171 }
Eric Andersenbefda6e1999-11-25 08:06:22 +0000172 }
Eric Andersen3843e961999-11-25 07:30:46 +0000173
Erik Andersene49d5ec2000-02-08 19:58:47 +0000174 openlog(name, option, (pri | LOG_FACMASK));
175 syslog(pri, message);
176 closelog();
Eric Andersen3843e961999-11-25 07:30:46 +0000177
Eric Andersenb6106152000-06-19 17:25:40 +0000178 return(TRUE);
Eric Andersen3843e961999-11-25 07:30:46 +0000179}