1 /* $OpenBSD: misc.c,v 1.9 2003/06/11 21:09:50 deraadt Exp $ */ 2 /* $NetBSD: misc.c,v 1.6 1995/03/21 09:03:09 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1980, 1991, 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. 16 * 3. Neither the name of the University nor the names of its contributors 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 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 5/31/93"; 36 #else 37 static char rcsid[] = "$OpenBSD: misc.c,v 1.9 2003/06/11 21:09:50 deraadt Exp $"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <stdarg.h> 45 46 #include "csh.h" 47 #include "extern.h" 48 49 static int renum(int, int); 50 51 int 52 any(char *s, int c) 53 { 54 if (!s) 55 return (0); /* Check for nil pointer */ 56 while (*s) 57 if (*s++ == c) 58 return (1); 59 return (0); 60 } 61 62 void 63 setzero(char *cp, int i) 64 { 65 if (i != 0) 66 do 67 *cp++ = 0; 68 while (--i); 69 } 70 71 char * 72 strsave(char *s) 73 { 74 char *n; 75 char *p; 76 77 if (s == NULL) 78 s = ""; 79 for (p = s; *p++;) 80 continue; 81 n = p = (char *) xmalloc((size_t) ((p - s) * sizeof(char))); 82 while ((*p++ = *s++) != '\0') 83 continue; 84 return (n); 85 } 86 87 Char ** 88 blkend(Char **up) 89 { 90 91 while (*up) 92 up++; 93 return (up); 94 } 95 96 97 void 98 blkpr(FILE *fp, Char **av) 99 { 100 101 for (; *av; av++) { 102 (void) fprintf(fp, "%s", vis_str(*av)); 103 if (av[1]) 104 (void) fprintf(fp, " "); 105 } 106 } 107 108 int 109 blklen(Char **av) 110 { 111 int i = 0; 112 113 while (*av++) 114 i++; 115 return (i); 116 } 117 118 Char ** 119 blkcpy(Char **oav, Char **bv) 120 { 121 Char **av = oav; 122 123 while ((*av++ = *bv++) != NULL) 124 continue; 125 return (oav); 126 } 127 128 Char ** 129 blkcat(Char **up, Char **vp) 130 { 131 132 (void) blkcpy(blkend(up), vp); 133 return (up); 134 } 135 136 void 137 blkfree(Char **av0) 138 { 139 Char **av = av0; 140 141 if (!av0) 142 return; 143 for (; *av; av++) 144 xfree((ptr_t) * av); 145 xfree((ptr_t) av0); 146 } 147 148 Char ** 149 saveblk(Char **v) 150 { 151 Char **newv = 152 (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); 153 Char **onewv = newv; 154 155 while (*v) 156 *newv++ = Strsave(*v++); 157 return (onewv); 158 } 159 160 #ifdef NOTUSED 161 char * 162 strstr(char *s, char *t) 163 { 164 do { 165 char *ss = s; 166 char *tt = t; 167 168 do 169 if (*tt == '\0') 170 return (s); 171 while (*ss++ == *tt++); 172 } while (*s++ != '\0'); 173 return (NULL); 174 } 175 176 #endif /* NOTUSED */ 177 178 #ifndef SHORT_STRINGS 179 char * 180 strspl(char *cp, char *dp) 181 { 182 char *ep; 183 char *p, *q; 184 185 if (!cp) 186 cp = ""; 187 if (!dp) 188 dp = ""; 189 for (p = cp; *p++;) 190 continue; 191 for (q = dp; *q++;) 192 continue; 193 ep = (char *) xmalloc((size_t) (((p - cp) + (q - dp) - 1) * sizeof(char))); 194 for (p = ep, q = cp; *p++ = *q++;) 195 continue; 196 for (p--, q = dp; *p++ = *q++;) 197 continue; 198 return (ep); 199 } 200 201 #endif 202 203 Char ** 204 blkspl(Char **up, Char **vp) 205 { 206 Char **wp = 207 (Char **) xcalloc((size_t) (blklen(up) + blklen(vp) + 1), 208 sizeof(Char **)); 209 210 (void) blkcpy(wp, up); 211 return (blkcat(wp, vp)); 212 } 213 214 Char 215 lastchr(Char *cp) 216 { 217 218 if (!cp) 219 return (0); 220 if (!*cp) 221 return (0); 222 while (cp[1]) 223 cp++; 224 return (*cp); 225 } 226 227 /* 228 * This routine is called after an error to close up 229 * any units which may have been left open accidentally. 230 */ 231 void 232 closem(void) 233 { 234 int f; 235 236 for (f = 0; f < sysconf(_SC_OPEN_MAX); f++) 237 if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD && 238 f != FSHTTY) 239 (void) close(f); 240 } 241 242 void 243 donefds(void) 244 { 245 (void) close(0); 246 (void) close(1); 247 (void) close(2); 248 249 didfds = 0; 250 } 251 252 /* 253 * Move descriptor i to j. 254 * If j is -1 then we just want to get i to a safe place, 255 * i.e. to a unit > 2. This also happens in dcopy. 256 */ 257 int 258 dmove(int i, int j) 259 { 260 261 if (i == j || i < 0) 262 return (i); 263 if (j >= 0) { 264 (void) dup2(i, j); 265 if (j != i) 266 (void) close(i); 267 return (j); 268 } 269 j = dcopy(i, j); 270 if (j != i) 271 (void) close(i); 272 return (j); 273 } 274 275 int 276 dcopy(int i, int j) 277 { 278 279 if (i == j || i < 0 || (j < 0 && i > 2)) 280 return (i); 281 if (j >= 0) { 282 (void) dup2(i, j); 283 return (j); 284 } 285 (void) close(j); 286 return (renum(i, j)); 287 } 288 289 static int 290 renum(int i, int j) 291 { 292 int k = dup(i); 293 294 if (k < 0) 295 return (-1); 296 if (j == -1 && k > 2) 297 return (k); 298 if (k != j) { 299 j = renum(k, j); 300 (void) close(k); 301 return (j); 302 } 303 return (k); 304 } 305 306 /* 307 * Left shift a command argument list, discarding 308 * the first c arguments. Used in "shift" commands 309 * as well as by commands like "repeat". 310 */ 311 void 312 lshift(Char **v, int c) 313 { 314 Char **u; 315 316 for (u = v; *u && --c >= 0; u++) 317 xfree((ptr_t) *u); 318 (void) blkcpy(v, u); 319 } 320 321 int 322 number(Char *cp) 323 { 324 if (!cp) 325 return(0); 326 if (*cp == '-') { 327 cp++; 328 if (!Isdigit(*cp)) 329 return (0); 330 cp++; 331 } 332 while (*cp && Isdigit(*cp)) 333 cp++; 334 return (*cp == 0); 335 } 336 337 Char ** 338 copyblk(Char **v) 339 { 340 Char **nv = (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); 341 342 return (blkcpy(nv, v)); 343 } 344 345 #ifndef SHORT_STRINGS 346 char * 347 strend(char *cp) 348 { 349 if (!cp) 350 return (cp); 351 while (*cp) 352 cp++; 353 return (cp); 354 } 355 356 #endif /* SHORT_STRINGS */ 357 358 Char * 359 strip(Char *cp) 360 { 361 Char *dp = cp; 362 363 if (!cp) 364 return (cp); 365 while ((*dp++ &= TRIM) != '\0') 366 continue; 367 return (cp); 368 } 369 370 Char * 371 quote(Char *cp) 372 { 373 Char *dp = cp; 374 375 if (!cp) 376 return (cp); 377 while (*dp != '\0') 378 *dp++ |= QUOTE; 379 return (cp); 380 } 381 382 void 383 udvar(Char *name) 384 { 385 386 setname(vis_str(name)); 387 stderror(ERR_NAME | ERR_UNDVAR); 388 } 389 390 int 391 prefix(Char *sub, Char *str) 392 { 393 394 for (;;) { 395 if (*sub == 0) 396 return (1); 397 if (*str == 0) 398 return (0); 399 if (*sub++ != *str++) 400 return (0); 401 } 402 } 403