Ansify some function definitions that were previously overlooked.
[dragonfly.git] / usr.bin / locate / locate / locate.c
CommitLineData
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1/*
2 * Copyright (c) 1995 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
3 * Copyright (c) 1989, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * James A. Woods.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
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36 *
37 * @(#) Copyright (c) 1995-1996 Wolfram Schneider, Berlin. @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
38 * @(#)locate.c 8.1 (Berkeley) 6/6/93
39 * $FreeBSD: src/usr.bin/locate/locate/locate.c,v 1.12.2.1 2001/03/04 08:47:25 kris Exp $
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40 */
41
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42/*
43 * Ref: Usenix ;login:, Vol 8, No 1, February/March, 1983, p. 8.
44 *
45 * Locate scans a file list for the full pathname of a file given only part
46 * of the name. The list has been processed with with "front-compression"
47 * and bigram coding. Front compression reduces space by a factor of 4-5,
48 * bigram coding by a further 20-25%.
49 *
50 * The codes are:
51 *
52 * 0-28 likeliest differential counts + offset to make nonnegative
53 * 30 switch code for out-of-range count to follow in next word
54 * 31 an 8 bit char followed
55 * 128-255 bigram codes (128 most common, as determined by 'updatedb')
56 * 32-127 single character (printable) ascii residue (ie, literal)
57 *
58 * A novel two-tiered string search technique is employed:
59 *
60 * First, a metacharacter-free subpattern and partial pathname is matched
61 * BACKWARDS to avoid full expansion of the pathname list. The time savings
62 * is 40-50% over forward matching, which cannot efficiently handle
63 * overlapped search patterns and compressed path residue.
64 *
65 * Then, the actual shell glob-style regular expression (if in this form) is
66 * matched against the candidate pathnames using the slower routines provided
67 * in the standard 'find'.
68 */
69
70#include <sys/param.h>
71#include <ctype.h>
72#include <err.h>
73#include <fnmatch.h>
74#include <locale.h>
75#include <stdio.h>
76#include <stdlib.h>
77#include <string.h>
78#include <unistd.h>
79
80#ifdef MMAP
81# include <sys/types.h>
82# include <sys/stat.h>
83# include <sys/mman.h>
84# include <fcntl.h>
85#endif
86
87
88#ifdef sun
89#include <netinet/in.h> /* SunOS byteorder(3) htohl(3) */
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90#endif
91
92#include "locate.h"
93#include "pathnames.h"
94
95#ifdef DEBUG
96# include <sys/time.h>
97# include <sys/types.h>
98# include <sys/resource.h>
99#endif
100
101char *path_fcodes; /* locate database */
102int f_mmap; /* use mmap */
103int f_icase; /* ignore case */
104int f_stdin; /* read database from stdin */
105int f_statistic; /* print statistic */
106int f_silent; /* suppress output, show only count of matches */
107int f_limit; /* limit number of output lines, 0 == infinite */
108u_int counter; /* counter for matches [-c] */
109
110
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111void usage(void);
112void statistic(FILE *, char *);
113void fastfind(FILE *, char *, char *);
114void fastfind_icase(FILE *, char *, char *);
115void fastfind_mmap(char *, caddr_t, int, char *);
116void fastfind_mmap_icase(char *, caddr_t, int, char *);
117void search_mmap(char *, char **);
118void search_fopen(char *, char **);
119unsigned long cputime(void);
984263bc 120
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121extern char **colon(char **, char*, char*);
122extern void print_matches(u_int);
123extern int getwm(caddr_t);
124extern int getwf(FILE *);
125extern u_char *tolower_word(u_char *);
126extern int check_bigram_char(int);
127extern char *patprep(char *);
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128
129int
89a89091 130main(int argc, char **argv)
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131{
132 register int ch;
133 char **dbv = NULL;
134#ifdef MMAP
135 f_mmap = 1; /* mmap is default */
136#endif
137 (void) setlocale(LC_ALL, "");
138
139 while ((ch = getopt(argc, argv, "Scd:il:ms")) != -1)
140 switch(ch) {
141 case 'S': /* statistic lines */
142 f_statistic = 1;
143 break;
144 case 'l': /* limit number of output lines, 0 == infinite */
145 f_limit = atoi(optarg);
146 break;
147 case 'd': /* database */
148 dbv = colon(dbv, optarg, _PATH_FCODES);
149 break;
150 case 'i': /* ignore case */
151 f_icase = 1;
152 break;
153 case 'm': /* mmap */
154#ifdef MMAP
155 f_mmap = 1;
156#else
157 warnx("mmap(2) not implemented");
158#endif
159 break;
160 case 's': /* stdio lib */
161 f_mmap = 0;
162 break;
163 case 'c': /* suppress output, show only count of matches */
164 f_silent = 1;
165 break;
166 default:
167 usage();
168 }
169 argv += optind;
170 argc -= optind;
171
172 /* to few arguments */
173 if (argc < 1 && !(f_statistic))
174 usage();
175
176 /* no (valid) database as argument */
177 if (dbv == NULL || *dbv == NULL) {
178 /* try to read database from enviroment */
179 if ((path_fcodes = getenv("LOCATE_PATH")) == NULL ||
180 *path_fcodes == '\0')
181 /* use default database */
182 dbv = colon(dbv, _PATH_FCODES, _PATH_FCODES);
183 else /* $LOCATE_PATH */
184 dbv = colon(dbv, path_fcodes, _PATH_FCODES);
185 }
186
187 if (f_icase && UCHAR_MAX < 4096) /* init tolower lookup table */
188 for (ch = 0; ch < UCHAR_MAX + 1; ch++)
189 myctype[ch] = tolower(ch);
190
191 /* foreach database ... */
192 while((path_fcodes = *dbv) != NULL) {
193 dbv++;
194
195 if (!strcmp(path_fcodes, "-"))
196 f_stdin = 1;
197 else
198 f_stdin = 0;
199
200#ifndef MMAP
201 f_mmap = 0; /* be paranoid */
202#endif
203 if (!f_mmap || f_stdin || f_statistic)
204 search_fopen(path_fcodes, argv);
205 else
206 search_mmap(path_fcodes, argv);
207 }
208
209 if (f_silent)
210 print_matches(counter);
211 exit(0);
212}
213
214
215void
89a89091 216search_fopen(char *db, char **s)
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217{
218 FILE *fp;
219#ifdef DEBUG
220 long t0;
221#endif
222
223 /* can only read stdin once */
224 if (f_stdin) {
225 fp = stdin;
226 if (*(s+1) != NULL) {
227 warnx("read database from stdin, use only `%s' as pattern", *s);
228 *(s+1) = NULL;
229 }
230 }
231 else if ((fp = fopen(path_fcodes, "r")) == NULL)
232 err(1, "`%s'", path_fcodes);
233
234 /* count only chars or lines */
235 if (f_statistic) {
236 statistic(fp, path_fcodes);
237 (void)fclose(fp);
238 return;
239 }
240
241 /* foreach search string ... */
242 while(*s != NULL) {
243#ifdef DEBUG
244 t0 = cputime();
245#endif
246 if (!f_stdin &&
247 fseek(fp, (long)0, SEEK_SET) == -1)
248 err(1, "fseek to begin of ``%s''\n", path_fcodes);
249
250 if (f_icase)
251 fastfind_icase(fp, *s, path_fcodes);
252 else
253 fastfind(fp, *s, path_fcodes);
254#ifdef DEBUG
255 warnx("fastfind %ld ms", cputime () - t0);
256#endif
257 s++;
258 }
259 (void)fclose(fp);
260}
261
262#ifdef MMAP
263void
89a89091 264search_mmap(char *db, char **s)
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265{
266 struct stat sb;
267 int fd;
268 caddr_t p;
269 off_t len;
270#ifdef DEBUG
271 long t0;
272#endif
273 if ((fd = open(path_fcodes, O_RDONLY)) == -1 ||
274 fstat(fd, &sb) == -1)
275 err(1, "`%s'", path_fcodes);
276 len = sb.st_size;
277
278 if ((p = mmap((caddr_t)0, (size_t)len,
279 PROT_READ, MAP_SHARED,
280 fd, (off_t)0)) == MAP_FAILED)
281 err(1, "mmap ``%s''", path_fcodes);
282
283 /* foreach search string ... */
284 while (*s != NULL) {
285#ifdef DEBUG
286 t0 = cputime();
287#endif
288 if (f_icase)
289 fastfind_mmap_icase(*s, p, (int)len, path_fcodes);
290 else
291 fastfind_mmap(*s, p, (int)len, path_fcodes);
292#ifdef DEBUG
293 warnx("fastfind %ld ms", cputime () - t0);
294#endif
295 s++;
296 }
297
298 if (munmap(p, (size_t)len) == -1)
299 warn("munmap %s\n", path_fcodes);
300
301 (void)close(fd);
302}
303#endif /* MMAP */
304
305#ifdef DEBUG
306unsigned long
89a89091 307cputime (void)
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308{
309 struct rusage rus;
310
311 getrusage(0, &rus);
312 return(rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000);
313}
314#endif /* DEBUG */
315
316void
89a89091 317usage (void)
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318{
319 (void)fprintf(stderr,
320 "usage: locate [-Scims] [-l limit] [-d database] pattern ...\n\n");
321 (void)fprintf(stderr,
322 "default database: `%s' or $LOCATE_PATH\n", _PATH_FCODES);
323 exit(1);
324}
325
326
327/* load fastfind functions */
328
329/* statistic */
330/* fastfind_mmap, fastfind_mmap_icase */
331#ifdef MMAP
332#undef FF_MMAP
333#undef FF_ICASE
334
335#define FF_MMAP
336#include "fastfind.c"
337#define FF_ICASE
338#include "fastfind.c"
339#endif /* MMAP */
340
341/* fopen */
342/* fastfind, fastfind_icase */
343#undef FF_MMAP
344#undef FF_ICASE
345#include "fastfind.c"
346#define FF_ICASE
347#include "fastfind.c"