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. 36 * 37 * $FreeBSD: src/usr.bin/locate/locate/util.c,v 1.6.2.1 2001/12/20 04:21:48 mikeh Exp $ 38 */ 39 40 41 #include <stdlib.h> 42 #include <string.h> 43 #include <err.h> 44 #include <sys/param.h> 45 #include <stdio.h> 46 47 #include "locate.h" 48 49 char **colon __P((char **, char*, char*)); 50 char *patprep __P((char *)); 51 void print_matches __P((u_int)); 52 u_char *tolower_word __P((u_char *)); 53 int getwm __P((caddr_t)); 54 int getwf __P((FILE *)); 55 int check_bigram_char __P((int)); 56 57 /* 58 * Validate bigram chars. If the test failed the database is corrupt 59 * or the database is obviously not a locate database. 60 */ 61 int 62 check_bigram_char(ch) 63 int ch; 64 { 65 /* legal bigram: 0, ASCII_MIN ... ASCII_MAX */ 66 if (ch == 0 || 67 (ch >= ASCII_MIN && ch <= ASCII_MAX)) 68 return(ch); 69 70 errx(1, 71 "locate database header corrupt, bigram char outside 0, %d-%d: %d", 72 ASCII_MIN, ASCII_MAX, ch); 73 exit(1); 74 } 75 76 /* split a colon separated string into a char vector 77 * 78 * "bla:foo" -> {"foo", "bla"} 79 * "bla:" -> {"foo", dot} 80 * "bla" -> {"bla"} 81 * "" -> do nothing 82 * 83 */ 84 char ** 85 colon(dbv, path, dot) 86 char **dbv; 87 char *path; 88 char *dot; /* default for single ':' */ 89 { 90 int vlen, slen; 91 char *c, *ch, *p; 92 char **pv; 93 94 if (dbv == NULL) { 95 if ((dbv = malloc(sizeof(char **))) == NULL) 96 err(1, "malloc"); 97 *dbv = NULL; 98 } 99 100 /* empty string */ 101 if (*path == '\0') { 102 warnx("empty database name, ignored"); 103 return(dbv); 104 } 105 106 /* length of string vector */ 107 for(vlen = 0, pv = dbv; *pv != NULL; pv++, vlen++); 108 109 for (ch = c = path; ; ch++) { 110 if (*ch == ':' || 111 (!*ch && !(*(ch - 1) == ':' && ch == 1+ path))) { 112 /* single colon -> dot */ 113 if (ch == c) 114 p = dot; 115 else { 116 /* a string */ 117 slen = ch - c; 118 if ((p = malloc(sizeof(char) * (slen + 1))) 119 == NULL) 120 err(1, "malloc"); 121 bcopy(c, p, slen); 122 *(p + slen) = '\0'; 123 } 124 /* increase dbv with element p */ 125 if ((dbv = realloc(dbv, sizeof(char **) * (vlen + 2))) 126 == NULL) 127 err(1, "realloc"); 128 *(dbv + vlen) = p; 129 *(dbv + ++vlen) = NULL; 130 c = ch + 1; 131 } 132 if (*ch == '\0') 133 break; 134 } 135 return (dbv); 136 } 137 138 void 139 print_matches(counter) 140 u_int counter; 141 { 142 (void)printf("%d\n", counter); 143 } 144 145 146 /* 147 * extract last glob-free subpattern in name for fast pre-match; prepend 148 * '\0' for backwards match; return end of new pattern 149 */ 150 static char globfree[100]; 151 152 char * 153 patprep(name) 154 char *name; 155 { 156 register char *endmark, *p, *subp; 157 158 subp = globfree; 159 *subp++ = '\0'; /* set first element to '\0' */ 160 p = name + strlen(name) - 1; 161 162 /* skip trailing metacharacters */ 163 for (; p >= name; p--) 164 if (index(LOCATE_REG, *p) == NULL) 165 break; 166 167 /* 168 * check if maybe we are in a character class 169 * 170 * 'foo.[ch]' 171 * |----< p 172 */ 173 if (p >= name && 174 (index(p, '[') != NULL || index(p, ']') != NULL)) { 175 for (p = name; *p != '\0'; p++) 176 if (*p == ']' || *p == '[') 177 break; 178 p--; 179 180 /* 181 * cannot find a non-meta character, give up 182 * '*\*[a-z]' 183 * |-------< p 184 */ 185 if (p >= name && index(LOCATE_REG, *p) != NULL) 186 p = name - 1; 187 } 188 189 if (p < name) 190 /* only meta chars: "???", force '/' search */ 191 *subp++ = '/'; 192 193 else { 194 for (endmark = p; p >= name; p--) 195 if (index(LOCATE_REG, *p) != NULL) 196 break; 197 for (++p; 198 (p <= endmark) && subp < (globfree + sizeof(globfree));) 199 *subp++ = *p++; 200 } 201 *subp = '\0'; 202 return(--subp); 203 } 204 205 /* tolower word */ 206 u_char * 207 tolower_word(word) 208 u_char *word; 209 { 210 register u_char *p; 211 212 for(p = word; *p != '\0'; p++) 213 *p = TOLOWER(*p); 214 215 return(word); 216 } 217 218 219 /* 220 * Read integer from mmap pointer. 221 * Essential a simple ``return *(int *)p'' but avoid sigbus 222 * for integer alignment (SunOS 4.x, 5.x). 223 * 224 * Convert network byte order to host byte order if neccessary. 225 * So we can read on FreeBSD/i386 (little endian) a locate database 226 * which was built on SunOS/sparc (big endian). 227 */ 228 229 int 230 getwm(p) 231 caddr_t p; 232 { 233 static char buf[INTSIZE]; 234 register int i; 235 236 for (i = 0; i < INTSIZE; i++) 237 buf[i] = *p++; 238 239 i = *(int *)buf; 240 241 if (i > MAXPATHLEN || i < -(MAXPATHLEN)) { 242 i = ntohl(i); 243 if (i > MAXPATHLEN || i < -(MAXPATHLEN)) 244 errx(1, "integer out of +-MAXPATHLEN (%d): %d", 245 MAXPATHLEN, abs(i) < abs(htonl(i)) ? i : htonl(i)); 246 } 247 return(i); 248 } 249 250 /* 251 * Read integer from stream. 252 * 253 * Convert network byte order to host byte order if neccessary. 254 * So we can read on FreeBSD/i386 (little endian) a locate database 255 * which was built on SunOS/sparc (big endian). 256 */ 257 258 int 259 getwf(fp) 260 FILE *fp; 261 { 262 register int word; 263 264 word = getw(fp); 265 266 if (word > MAXPATHLEN || word < -(MAXPATHLEN)) { 267 word = ntohl(word); 268 if (word > MAXPATHLEN || word < -(MAXPATHLEN)) 269 errx(1, "integer out of +-MAXPATHLEN (%d): %d", 270 MAXPATHLEN, abs(word) < abs(htonl(word)) ? word : 271 htonl(word)); 272 } 273 return(word); 274 } 275