1 /* $NetBSD: misc.c,v 1.6 1995/03/21 09:03:09 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 5/31/93"; 39 #else 40 static char rcsid[] = "$NetBSD: misc.c,v 1.6 1995/03/21 09:03:09 cgd Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 #if __STDC__ 48 # include <stdarg.h> 49 #else 50 # include <varargs.h> 51 #endif 52 53 #include "csh.h" 54 #include "extern.h" 55 56 static int renum __P((int, int)); 57 58 int 59 any(s, c) 60 register char *s; 61 register int c; 62 { 63 if (!s) 64 return (0); /* Check for nil pointer */ 65 while (*s) 66 if (*s++ == c) 67 return (1); 68 return (0); 69 } 70 71 void 72 setzero(cp, i) 73 char *cp; 74 int i; 75 { 76 if (i != 0) 77 do 78 *cp++ = 0; 79 while (--i); 80 } 81 82 char * 83 strsave(s) 84 register char *s; 85 { 86 char *n; 87 register char *p; 88 89 if (s == NULL) 90 s = ""; 91 for (p = s; *p++;) 92 continue; 93 n = p = (char *) xmalloc((size_t) ((p - s) * sizeof(char))); 94 while ((*p++ = *s++) != '\0') 95 continue; 96 return (n); 97 } 98 99 Char ** 100 blkend(up) 101 register Char **up; 102 { 103 104 while (*up) 105 up++; 106 return (up); 107 } 108 109 110 void 111 blkpr(fp, av) 112 FILE *fp; 113 register Char **av; 114 { 115 116 for (; *av; av++) { 117 (void) fprintf(fp, "%s", vis_str(*av)); 118 if (av[1]) 119 (void) fprintf(fp, " "); 120 } 121 } 122 123 int 124 blklen(av) 125 register Char **av; 126 { 127 register int i = 0; 128 129 while (*av++) 130 i++; 131 return (i); 132 } 133 134 Char ** 135 blkcpy(oav, bv) 136 Char **oav; 137 register Char **bv; 138 { 139 register Char **av = oav; 140 141 while ((*av++ = *bv++) != NULL) 142 continue; 143 return (oav); 144 } 145 146 Char ** 147 blkcat(up, vp) 148 Char **up, **vp; 149 { 150 151 (void) blkcpy(blkend(up), vp); 152 return (up); 153 } 154 155 void 156 blkfree(av0) 157 Char **av0; 158 { 159 register Char **av = av0; 160 161 if (!av0) 162 return; 163 for (; *av; av++) 164 xfree((ptr_t) * av); 165 xfree((ptr_t) av0); 166 } 167 168 Char ** 169 saveblk(v) 170 register Char **v; 171 { 172 register Char **newv = 173 (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); 174 Char **onewv = newv; 175 176 while (*v) 177 *newv++ = Strsave(*v++); 178 return (onewv); 179 } 180 181 #ifdef NOTUSED 182 char * 183 strstr(s, t) 184 register char *s, *t; 185 { 186 do { 187 register char *ss = s; 188 register char *tt = t; 189 190 do 191 if (*tt == '\0') 192 return (s); 193 while (*ss++ == *tt++); 194 } while (*s++ != '\0'); 195 return (NULL); 196 } 197 198 #endif /* NOTUSED */ 199 200 #ifndef SHORT_STRINGS 201 char * 202 strspl(cp, dp) 203 char *cp, *dp; 204 { 205 char *ep; 206 register char *p, *q; 207 208 if (!cp) 209 cp = ""; 210 if (!dp) 211 dp = ""; 212 for (p = cp; *p++;) 213 continue; 214 for (q = dp; *q++;) 215 continue; 216 ep = (char *) xmalloc((size_t) (((p - cp) + (q - dp) - 1) * sizeof(char))); 217 for (p = ep, q = cp; *p++ = *q++;) 218 continue; 219 for (p--, q = dp; *p++ = *q++;) 220 continue; 221 return (ep); 222 } 223 224 #endif 225 226 Char ** 227 blkspl(up, vp) 228 register Char **up, **vp; 229 { 230 register Char **wp = 231 (Char **) xcalloc((size_t) (blklen(up) + blklen(vp) + 1), 232 sizeof(Char **)); 233 234 (void) blkcpy(wp, up); 235 return (blkcat(wp, vp)); 236 } 237 238 Char 239 lastchr(cp) 240 register Char *cp; 241 { 242 243 if (!cp) 244 return (0); 245 if (!*cp) 246 return (0); 247 while (cp[1]) 248 cp++; 249 return (*cp); 250 } 251 252 /* 253 * This routine is called after an error to close up 254 * any units which may have been left open accidentally. 255 */ 256 void 257 closem() 258 { 259 register int f; 260 261 for (f = 0; f < NOFILE; f++) 262 if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD && 263 f != FSHTTY) 264 (void) close(f); 265 } 266 267 void 268 donefds() 269 { 270 (void) close(0); 271 (void) close(1); 272 (void) close(2); 273 274 didfds = 0; 275 } 276 277 /* 278 * Move descriptor i to j. 279 * If j is -1 then we just want to get i to a safe place, 280 * i.e. to a unit > 2. This also happens in dcopy. 281 */ 282 int 283 dmove(i, j) 284 register int i, j; 285 { 286 287 if (i == j || i < 0) 288 return (i); 289 if (j >= 0) { 290 (void) dup2(i, j); 291 if (j != i) 292 (void) close(i); 293 return (j); 294 } 295 j = dcopy(i, j); 296 if (j != i) 297 (void) close(i); 298 return (j); 299 } 300 301 int 302 dcopy(i, j) 303 register int i, j; 304 { 305 306 if (i == j || i < 0 || (j < 0 && i > 2)) 307 return (i); 308 if (j >= 0) { 309 (void) dup2(i, j); 310 return (j); 311 } 312 (void) close(j); 313 return (renum(i, j)); 314 } 315 316 static int 317 renum(i, j) 318 register int i, j; 319 { 320 register int k = dup(i); 321 322 if (k < 0) 323 return (-1); 324 if (j == -1 && k > 2) 325 return (k); 326 if (k != j) { 327 j = renum(k, j); 328 (void) close(k); 329 return (j); 330 } 331 return (k); 332 } 333 334 /* 335 * Left shift a command argument list, discarding 336 * the first c arguments. Used in "shift" commands 337 * as well as by commands like "repeat". 338 */ 339 void 340 lshift(v, c) 341 register Char **v; 342 register int c; 343 { 344 register Char **u; 345 346 for (u = v; *u && --c >= 0; u++) 347 xfree((ptr_t) *u); 348 (void) blkcpy(v, u); 349 } 350 351 int 352 number(cp) 353 Char *cp; 354 { 355 if (!cp) 356 return(0); 357 if (*cp == '-') { 358 cp++; 359 if (!Isdigit(*cp)) 360 return (0); 361 cp++; 362 } 363 while (*cp && Isdigit(*cp)) 364 cp++; 365 return (*cp == 0); 366 } 367 368 Char ** 369 copyblk(v) 370 register Char **v; 371 { 372 Char **nv = (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); 373 374 return (blkcpy(nv, v)); 375 } 376 377 #ifndef SHORT_STRINGS 378 char * 379 strend(cp) 380 register char *cp; 381 { 382 if (!cp) 383 return (cp); 384 while (*cp) 385 cp++; 386 return (cp); 387 } 388 389 #endif /* SHORT_STRINGS */ 390 391 Char * 392 strip(cp) 393 Char *cp; 394 { 395 register Char *dp = cp; 396 397 if (!cp) 398 return (cp); 399 while ((*dp++ &= TRIM) != '\0') 400 continue; 401 return (cp); 402 } 403 404 void 405 udvar(name) 406 Char *name; 407 { 408 409 setname(vis_str(name)); 410 stderror(ERR_NAME | ERR_UNDVAR); 411 } 412 413 int 414 prefix(sub, str) 415 register Char *sub, *str; 416 { 417 418 for (;;) { 419 if (*sub == 0) 420 return (1); 421 if (*str == 0) 422 return (0); 423 if (*sub++ != *str++) 424 return (0); 425 } 426 } 427