Annotation of src/usr.bin/logger/logger.c, Revision 1.18
1.18 ! guenther 1: /* $OpenBSD: logger.c,v 1.17 2016/03/28 18:18:52 chl Exp $ */
1.1 deraadt 2: /* $NetBSD: logger.c,v 1.4 1994/12/22 06:27:00 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.6 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <errno.h>
34: #include <unistd.h>
1.14 deraadt 35: #include <limits.h>
1.1 deraadt 36: #include <stdlib.h>
37: #include <stdio.h>
38: #include <ctype.h>
39: #include <string.h>
1.15 deraadt 40: #include <err.h>
1.1 deraadt 41:
42: #define SYSLOG_NAMES
43: #include <syslog.h>
44:
1.5 millert 45: int decode(char *, CODE *);
46: int pencode(char *);
47: void usage(void);
1.1 deraadt 48:
49: /*
50: * logger -- read and log utility
51: *
52: * Reads from an input and arranges to write the result on the system
53: * log.
54: */
55: int
1.7 deraadt 56: main(int argc, char *argv[])
1.1 deraadt 57: {
58: int ch, logflags, pri;
59: char *tag, buf[1024];
60:
61: tag = NULL;
62: pri = LOG_NOTICE;
63: logflags = 0;
1.18 ! guenther 64: while ((ch = getopt(argc, argv, "cf:ip:st:")) != -1)
1.13 okan 65: switch(ch) {
1.18 ! guenther 66: case 'c': /* log to console */
! 67: logflags |= LOG_CONS;
! 68: break;
1.1 deraadt 69: case 'f': /* file to log */
70: if (freopen(optarg, "r", stdin) == NULL) {
71: (void)fprintf(stderr, "logger: %s: %s.\n",
72: optarg, strerror(errno));
73: exit(1);
74: }
75: break;
76: case 'i': /* log process id also */
77: logflags |= LOG_PID;
78: break;
79: case 'p': /* priority */
80: pri = pencode(optarg);
81: break;
82: case 's': /* log to standard error */
83: logflags |= LOG_PERROR;
84: break;
85: case 't': /* tag */
86: tag = optarg;
87: break;
88: case '?':
89: default:
90: usage();
91: }
92: argc -= optind;
93: argv += optind;
94:
95: /* setup for logging */
96: openlog(tag ? tag : getlogin(), logflags, 0);
97: (void) fclose(stdout);
1.15 deraadt 98:
1.16 deraadt 99: if (pledge("stdio", NULL) == -1)
100: err(1, "pledge");
1.1 deraadt 101:
102: /* log input line if appropriate */
103: if (argc > 0) {
1.4 mpech 104: char *p, *endp;
1.8 dhill 105: size_t len;
1.1 deraadt 106:
107: for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) {
108: len = strlen(*argv);
109: if (p + len > endp && p > buf) {
110: syslog(pri, "%s", buf);
111: p = buf;
112: }
113: if (len > sizeof(buf) - 1)
114: syslog(pri, "%s", *argv++);
115: else {
116: if (p != buf)
117: *p++ = ' ';
118: bcopy(*argv++, p, len);
119: *(p += len) = '\0';
120: }
121: }
122: if (p != buf)
123: syslog(pri, "%s", buf);
124: } else
125: while (fgets(buf, sizeof(buf), stdin) != NULL)
126: syslog(pri, "%s", buf);
127: exit(0);
128: }
129:
130: /*
131: * Decode a symbolic name to a numeric value
132: */
133: int
1.7 deraadt 134: pencode(char *s)
1.1 deraadt 135: {
136: char *save;
137: int fac, lev;
138:
139: for (save = s; *s && *s != '.'; ++s);
140: if (*s) {
141: *s = '\0';
142: fac = decode(save, facilitynames);
143: if (fac < 0) {
144: (void)fprintf(stderr,
145: "logger: unknown facility name: %s.\n", save);
146: exit(1);
147: }
148: *s++ = '.';
149: }
150: else {
151: fac = 0;
152: s = save;
153: }
154: lev = decode(s, prioritynames);
155: if (lev < 0) {
156: (void)fprintf(stderr,
157: "logger: unknown priority name: %s.\n", save);
158: exit(1);
159: }
160: return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
161: }
162:
163: int
1.7 deraadt 164: decode(char *name, CODE *codetab)
1.1 deraadt 165: {
1.4 mpech 166: CODE *c;
1.1 deraadt 167:
1.14 deraadt 168: if (isdigit((unsigned char)*name)) {
169: const char *errstr;
170: int n = strtonum(name, 0, INT_MAX, &errstr);
171: if (!errstr)
172: return (n);
173: }
1.1 deraadt 174:
175: for (c = codetab; c->c_name; c++)
176: if (!strcasecmp(name, c->c_name))
177: return (c->c_val);
178:
179: return (-1);
180: }
181:
182: void
1.7 deraadt 183: usage(void)
1.1 deraadt 184: {
185: (void)fprintf(stderr,
1.18 ! guenther 186: "usage: logger [-cis] [-f file] [-p pri] [-t tag] [message ...]\n");
1.1 deraadt 187: exit(1);
188: }
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