blob: f9eafeb259d85400063ead816324f9278b42ed29
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini logger implementation for busybox |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | */ |
9 | //config:config LOGGER |
10 | //config: bool "logger" |
11 | //config: default y |
12 | //config: select FEATURE_SYSLOG |
13 | //config: help |
14 | //config: The logger utility allows you to send arbitrary text |
15 | //config: messages to the system log (i.e. the 'syslogd' utility) so |
16 | //config: they can be logged. This is generally used to help locate |
17 | //config: problems that occur within programs and scripts. |
18 | |
19 | //applet:IF_LOGGER(APPLET(logger, BB_DIR_USR_BIN, BB_SUID_DROP)) |
20 | |
21 | //kbuild:lib-$(CONFIG_LOGGER) += syslogd_and_logger.o |
22 | |
23 | //usage:#define logger_trivial_usage |
24 | //usage: "[OPTIONS] [MESSAGE]" |
25 | //usage:#define logger_full_usage "\n\n" |
26 | //usage: "Write MESSAGE (or stdin) to syslog\n" |
27 | //usage: "\n -s Log to stderr as well as the system log" |
28 | //usage: "\n -t TAG Log using the specified tag (defaults to user name)" |
29 | //usage: "\n -p PRIO Priority (numeric or facility.level pair)" |
30 | //usage: |
31 | //usage:#define logger_example_usage |
32 | //usage: "$ logger \"hello\"\n" |
33 | |
34 | /* |
35 | * Done in syslogd_and_logger.c: |
36 | #include "libbb.h" |
37 | #define SYSLOG_NAMES |
38 | #define SYSLOG_NAMES_CONST |
39 | #include <syslog.h> |
40 | */ |
41 | |
42 | /* Decode a symbolic name to a numeric value |
43 | * this function is based on code |
44 | * Copyright (c) 1983, 1993 |
45 | * The Regents of the University of California. All rights reserved. |
46 | * |
47 | * Original copyright notice is retained at the end of this file. |
48 | */ |
49 | static int decode(char *name, const CODE *codetab) |
50 | { |
51 | const CODE *c; |
52 | |
53 | if (isdigit(*name)) |
54 | return atoi(name); |
55 | for (c = codetab; c->c_name; c++) { |
56 | if (!strcasecmp(name, c->c_name)) { |
57 | return c->c_val; |
58 | } |
59 | } |
60 | |
61 | return -1; |
62 | } |
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 | * |
69 | * Original copyright notice is retained at the end of this file. |
70 | */ |
71 | static int pencode(char *s) |
72 | { |
73 | char *save; |
74 | int lev, fac = LOG_USER; |
75 | |
76 | for (save = s; *s && *s != '.'; ++s) |
77 | ; |
78 | if (*s) { |
79 | *s = '\0'; |
80 | fac = decode(save, facilitynames); |
81 | if (fac < 0) |
82 | bb_error_msg_and_die("unknown %s name: %s", "facility", save); |
83 | *s++ = '.'; |
84 | } else { |
85 | s = save; |
86 | } |
87 | lev = decode(s, prioritynames); |
88 | if (lev < 0) |
89 | bb_error_msg_and_die("unknown %s name: %s", "priority", save); |
90 | return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK)); |
91 | } |
92 | |
93 | #define strbuf bb_common_bufsiz1 |
94 | |
95 | int logger_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
96 | int logger_main(int argc UNUSED_PARAM, char **argv) |
97 | { |
98 | char *str_p, *str_t; |
99 | int opt; |
100 | int i = 0; |
101 | |
102 | setup_common_bufsiz(); |
103 | |
104 | /* Fill out the name string early (may be overwritten later) */ |
105 | str_t = uid2uname_utoa(geteuid()); |
106 | |
107 | /* Parse any options */ |
108 | opt = getopt32(argv, "p:st:", &str_p, &str_t); |
109 | |
110 | if (opt & 0x2) /* -s */ |
111 | i |= LOG_PERROR; |
112 | //if (opt & 0x4) /* -t */ |
113 | openlog(str_t, i, 0); |
114 | i = LOG_USER | LOG_NOTICE; |
115 | if (opt & 0x1) /* -p */ |
116 | i = pencode(str_p); |
117 | |
118 | argv += optind; |
119 | if (!argv[0]) { |
120 | while (fgets(strbuf, COMMON_BUFSIZE, stdin)) { |
121 | if (strbuf[0] |
122 | && NOT_LONE_CHAR(strbuf, '\n') |
123 | ) { |
124 | /* Neither "" nor "\n" */ |
125 | syslog(i, "%s", strbuf); |
126 | } |
127 | } |
128 | } else { |
129 | char *message = NULL; |
130 | int len = 0; |
131 | int pos = 0; |
132 | do { |
133 | len += strlen(*argv) + 1; |
134 | message = xrealloc(message, len + 1); |
135 | sprintf(message + pos, " %s", *argv), |
136 | pos = len; |
137 | } while (*++argv); |
138 | syslog(i, "%s", message + 1); /* skip leading " " */ |
139 | } |
140 | |
141 | closelog(); |
142 | return EXIT_SUCCESS; |
143 | } |
144 | |
145 | /* Clean up. Needed because we are included from syslogd_and_logger.c */ |
146 | #undef strbuf |
147 | |
148 | /*- |
149 | * Copyright (c) 1983, 1993 |
150 | * The Regents of the University of California. All rights reserved. |
151 | * |
152 | * This is the original license statement for the decode and pencode functions. |
153 | * |
154 | * Redistribution and use in source and binary forms, with or without |
155 | * modification, are permitted provided that the following conditions |
156 | * are met: |
157 | * 1. Redistributions of source code must retain the above copyright |
158 | * notice, this list of conditions and the following disclaimer. |
159 | * 2. Redistributions in binary form must reproduce the above copyright |
160 | * notice, this list of conditions and the following disclaimer in the |
161 | * documentation and/or other materials provided with the distribution. |
162 | * |
163 | * 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change |
164 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change |
165 | * |
166 | * 4. Neither the name of the University nor the names of its contributors |
167 | * may be used to endorse or promote products derived from this software |
168 | * without specific prior written permission. |
169 | * |
170 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
171 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
172 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
173 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
174 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
175 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
176 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
177 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
178 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
179 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
180 | * SUCH DAMAGE. |
181 | */ |
182 |