util.c revision 39297 
1/*
2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22#ifndef lint
23static const char rcsid[] =
24    "@(#) $Header: util.c,v 1.58 97/05/09 14:52:17 leres Exp $ (LBL)";
25#endif
26
27#include <sys/types.h>
28#include <sys/time.h>
29#include <sys/file.h>
30#include <sys/stat.h>
31
32#include <ctype.h>
33#include <errno.h>
34#ifdef HAVE_FCNTL_H
35#include <fcntl.h>
36#endif
37#ifdef HAVE_MALLOC_H
38#include <malloc.h>
39#endif
40#include <pcap.h>
41#include <stdio.h>
42#if __STDC__
43#include <stdarg.h>
44#else
45#include <varargs.h>
46#endif
47#include <stdlib.h>
48#include <string.h>
49#ifdef TIME_WITH_SYS_TIME
50#include <time.h>
51#endif
52#include <unistd.h>
53
54#include "interface.h"
55
56/*
57 * Print out a filename (or other ascii string).
58 * If ep is NULL, assume no truncation check is needed.
59 * Return true if truncated.
60 */
61int
62fn_print(register const u_char *s, register const u_char *ep)
63{
64	register int ret;
65	register u_char c;
66
67	ret = 1;			/* assume truncated */
68	while (ep == NULL || s < ep) {
69		c = *s++;
70		if (c == '\0') {
71			ret = 0;
72			break;
73		}
74		if (!isascii(c)) {
75			c = toascii(c);
76			putchar('M');
77			putchar('-');
78		}
79		if (!isprint(c)) {
80			c ^= 0x40;	/* DEL to ?, others to alpha */
81			putchar('^');
82		}
83		putchar(c);
84	}
85	return(ret);
86}
87
88/*
89 * Print out a counted filename (or other ascii string).
90 * If ep is NULL, assume no truncation check is needed.
91 * Return true if truncated.
92 */
93int
94fn_printn(register const u_char *s, register u_int n,
95	  register const u_char *ep)
96{
97	register int ret;
98	register u_char c;
99
100	ret = 1;			/* assume truncated */
101	while (ep == NULL || s < ep) {
102		if (n-- <= 0) {
103			ret = 0;
104			break;
105		}
106		c = *s++;
107		if (!isascii(c)) {
108			c = toascii(c);
109			putchar('M');
110			putchar('-');
111		}
112		if (!isprint(c)) {
113			c ^= 0x40;	/* DEL to ?, others to alpha */
114			putchar('^');
115		}
116		putchar(c);
117	}
118	return(ret);
119}
120
121/*
122 * Print the timestamp
123 */
124void
125ts_print(register const struct timeval *tvp)
126{
127	register int s;
128
129	if (tflag > 0) {
130		/* Default */
131		s = (tvp->tv_sec + thiszone) % 86400;
132		(void)printf("%02d:%02d:%02d.%06u ",
133		    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
134	} else if (tflag < 0) {
135		/* Unix timeval style */
136		(void)printf("%u.%06u ",
137		    (u_int32_t)tvp->tv_sec, (u_int32_t)tvp->tv_usec);
138	}
139}
140
141/*
142 * Convert a token value to a string; use "fmt" if not found.
143 */
144const char *
145tok2str(register const struct tok *lp, register const char *fmt,
146	register int v)
147{
148	static char buf[128];
149
150	while (lp->s != NULL) {
151		if (lp->v == v)
152			return (lp->s);
153		++lp;
154	}
155	if (fmt == NULL)
156		fmt = "#%d";
157	(void)sprintf(buf, fmt, v);
158	return (buf);
159}
160
161
162/* VARARGS */
163__dead void
164#if __STDC__
165error(const char *fmt, ...)
166#else
167error(fmt, va_alist)
168	const char *fmt;
169	va_dcl
170#endif
171{
172	va_list ap;
173
174	(void)fprintf(stderr, "%s: ", program_name);
175#if __STDC__
176	va_start(ap, fmt);
177#else
178	va_start(ap);
179#endif
180	(void)vfprintf(stderr, fmt, ap);
181	va_end(ap);
182	if (*fmt) {
183		fmt += strlen(fmt);
184		if (fmt[-1] != '\n')
185			(void)fputc('\n', stderr);
186	}
187	exit(1);
188	/* NOTREACHED */
189}
190
191/* VARARGS */
192void
193#if __STDC__
194warning(const char *fmt, ...)
195#else
196warning(fmt, va_alist)
197	const char *fmt;
198	va_dcl
199#endif
200{
201	va_list ap;
202
203	(void)fprintf(stderr, "%s: WARNING: ", program_name);
204#if __STDC__
205	va_start(ap, fmt);
206#else
207	va_start(ap);
208#endif
209	(void)vfprintf(stderr, fmt, ap);
210	va_end(ap);
211	if (*fmt) {
212		fmt += strlen(fmt);
213		if (fmt[-1] != '\n')
214			(void)fputc('\n', stderr);
215	}
216}
217
218/*
219 * Copy arg vector into a new buffer, concatenating arguments with spaces.
220 */
221char *
222copy_argv(register char **argv)
223{
224	register char **p;
225	register u_int len = 0;
226	char *buf;
227	char *src, *dst;
228
229	p = argv;
230	if (*p == 0)
231		return 0;
232
233	while (*p)
234		len += strlen(*p++) + 1;
235
236	buf = (char *)malloc(len);
237	if (buf == NULL)
238		error("copy_argv: malloc");
239
240	p = argv;
241	dst = buf;
242	while ((src = *p++) != NULL) {
243		while ((*dst++ = *src++) != '\0')
244			;
245		dst[-1] = ' ';
246	}
247	dst[-1] = '\0';
248
249	return buf;
250}
251
252char *
253read_infile(char *fname)
254{
255	register int fd, cc;
256	register char *cp;
257	struct stat buf;
258
259	fd = open(fname, O_RDONLY);
260	if (fd < 0)
261		error("can't open %s: %s", fname, pcap_strerror(errno));
262
263	if (fstat(fd, &buf) < 0)
264		error("can't stat %s: %s", fname, pcap_strerror(errno));
265
266	cp = malloc((u_int)buf.st_size + 1);
267	cc = read(fd, cp, (int)buf.st_size);
268	if (cc < 0)
269		error("read %s: %s", fname, pcap_strerror(errno));
270	if (cc != buf.st_size)
271		error("short read %s (%d != %d)", fname, cc, (int)buf.st_size);
272	cp[(int)buf.st_size] = '\0';
273
274	return (cp);
275}
276