1 /*- 2 * Copyright (c) 1980, 1991, 1993 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 the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)misc.c 8.1 (Berkeley) 5/31/93";*/ 36 static char *rcsid = "$Id: misc.c,v 1.5 1994/09/21 00:11:03 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/param.h> 40 #include <stdlib.h> 41 #include <unistd.h> 42 #if __STDC__ 43 # include <stdarg.h> 44 #else 45 # include <varargs.h> 46 #endif 47 48 #include "csh.h" 49 #include "extern.h" 50 51 static int renum __P((int, int)); 52 53 int 54 any(s, c) 55 register char *s; 56 register int c; 57 { 58 if (!s) 59 return (0); /* Check for nil pointer */ 60 while (*s) 61 if (*s++ == c) 62 return (1); 63 return (0); 64 } 65 66 void 67 setzero(cp, i) 68 char *cp; 69 int i; 70 { 71 if (i != 0) 72 do 73 *cp++ = 0; 74 while (--i); 75 } 76 77 char * 78 strsave(s) 79 register char *s; 80 { 81 char *n; 82 register char *p; 83 84 if (s == NULL) 85 s = ""; 86 for (p = s; *p++;) 87 continue; 88 n = p = (char *) xmalloc((size_t) ((p - s) * sizeof(char))); 89 while ((*p++ = *s++) != '\0') 90 continue; 91 return (n); 92 } 93 94 Char ** 95 blkend(up) 96 register Char **up; 97 { 98 99 while (*up) 100 up++; 101 return (up); 102 } 103 104 105 void 106 blkpr(fp, av) 107 FILE *fp; 108 register Char **av; 109 { 110 111 for (; *av; av++) { 112 (void) fprintf(fp, "%s", vis_str(*av)); 113 if (av[1]) 114 (void) fprintf(fp, " "); 115 } 116 } 117 118 int 119 blklen(av) 120 register Char **av; 121 { 122 register int i = 0; 123 124 while (*av++) 125 i++; 126 return (i); 127 } 128 129 Char ** 130 blkcpy(oav, bv) 131 Char **oav; 132 register Char **bv; 133 { 134 register Char **av = oav; 135 136 while ((*av++ = *bv++) != NULL) 137 continue; 138 return (oav); 139 } 140 141 Char ** 142 blkcat(up, vp) 143 Char **up, **vp; 144 { 145 146 (void) blkcpy(blkend(up), vp); 147 return (up); 148 } 149 150 void 151 blkfree(av0) 152 Char **av0; 153 { 154 register Char **av = av0; 155 156 if (!av0) 157 return; 158 for (; *av; av++) 159 xfree((ptr_t) * av); 160 xfree((ptr_t) av0); 161 } 162 163 Char ** 164 saveblk(v) 165 register Char **v; 166 { 167 register Char **newv = 168 (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); 169 Char **onewv = newv; 170 171 while (*v) 172 *newv++ = Strsave(*v++); 173 return (onewv); 174 } 175 176 #ifdef NOTUSED 177 char * 178 strstr(s, t) 179 register char *s, *t; 180 { 181 do { 182 register char *ss = s; 183 register char *tt = t; 184 185 do 186 if (*tt == '\0') 187 return (s); 188 while (*ss++ == *tt++); 189 } while (*s++ != '\0'); 190 return (NULL); 191 } 192 193 #endif /* NOTUSED */ 194 195 #ifndef SHORT_STRINGS 196 char * 197 strspl(cp, dp) 198 char *cp, *dp; 199 { 200 char *ep; 201 register char *p, *q; 202 203 if (!cp) 204 cp = ""; 205 if (!dp) 206 dp = ""; 207 for (p = cp; *p++;) 208 continue; 209 for (q = dp; *q++;) 210 continue; 211 ep = (char *) xmalloc((size_t) (((p - cp) + (q - dp) - 1) * sizeof(char))); 212 for (p = ep, q = cp; *p++ = *q++;) 213 continue; 214 for (p--, q = dp; *p++ = *q++;) 215 continue; 216 return (ep); 217 } 218 219 #endif 220 221 Char ** 222 blkspl(up, vp) 223 register Char **up, **vp; 224 { 225 register Char **wp = 226 (Char **) xcalloc((size_t) (blklen(up) + blklen(vp) + 1), 227 sizeof(Char **)); 228 229 (void) blkcpy(wp, up); 230 return (blkcat(wp, vp)); 231 } 232 233 Char 234 lastchr(cp) 235 register Char *cp; 236 { 237 238 if (!cp) 239 return (0); 240 if (!*cp) 241 return (0); 242 while (cp[1]) 243 cp++; 244 return (*cp); 245 } 246 247 /* 248 * This routine is called after an error to close up 249 * any units which may have been left open accidentally. 250 */ 251 void 252 closem() 253 { 254 register int f; 255 256 for (f = 0; f < NOFILE; f++) 257 if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD && 258 f != FSHTTY) 259 (void) close(f); 260 } 261 262 void 263 donefds() 264 { 265 (void) close(0); 266 (void) close(1); 267 (void) close(2); 268 269 didfds = 0; 270 } 271 272 /* 273 * Move descriptor i to j. 274 * If j is -1 then we just want to get i to a safe place, 275 * i.e. to a unit > 2. This also happens in dcopy. 276 */ 277 int 278 dmove(i, j) 279 register int i, j; 280 { 281 282 if (i == j || i < 0) 283 return (i); 284 if (j >= 0) { 285 (void) dup2(i, j); 286 if (j != i) 287 (void) close(i); 288 return (j); 289 } 290 j = dcopy(i, j); 291 if (j != i) 292 (void) close(i); 293 return (j); 294 } 295 296 int 297 dcopy(i, j) 298 register int i, j; 299 { 300 301 if (i == j || i < 0 || (j < 0 && i > 2)) 302 return (i); 303 if (j >= 0) { 304 (void) dup2(i, j); 305 return (j); 306 } 307 (void) close(j); 308 return (renum(i, j)); 309 } 310 311 static int 312 renum(i, j) 313 register int i, j; 314 { 315 register int k = dup(i); 316 317 if (k < 0) 318 return (-1); 319 if (j == -1 && k > 2) 320 return (k); 321 if (k != j) { 322 j = renum(k, j); 323 (void) close(k); 324 return (j); 325 } 326 return (k); 327 } 328 329 /* 330 * Left shift a command argument list, discarding 331 * the first c arguments. Used in "shift" commands 332 * as well as by commands like "repeat". 333 */ 334 void 335 lshift(v, c) 336 register Char **v; 337 register int c; 338 { 339 register Char **u; 340 341 for (u = v; *u && --c >= 0; u++) 342 xfree((ptr_t) *u); 343 (void) blkcpy(v, u); 344 } 345 346 int 347 number(cp) 348 Char *cp; 349 { 350 if (!cp) 351 return(0); 352 if (*cp == '-') { 353 cp++; 354 if (!Isdigit(*cp)) 355 return (0); 356 cp++; 357 } 358 while (*cp && Isdigit(*cp)) 359 cp++; 360 return (*cp == 0); 361 } 362 363 Char ** 364 copyblk(v) 365 register Char **v; 366 { 367 Char **nv = (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); 368 369 return (blkcpy(nv, v)); 370 } 371 372 #ifndef SHORT_STRINGS 373 char * 374 strend(cp) 375 register char *cp; 376 { 377 if (!cp) 378 return (cp); 379 while (*cp) 380 cp++; 381 return (cp); 382 } 383 384 #endif /* SHORT_STRINGS */ 385 386 Char * 387 strip(cp) 388 Char *cp; 389 { 390 register Char *dp = cp; 391 392 if (!cp) 393 return (cp); 394 while ((*dp++ &= TRIM) != '\0') 395 continue; 396 return (cp); 397 } 398 399 void 400 udvar(name) 401 Char *name; 402 { 403 404 setname(vis_str(name)); 405 stderror(ERR_NAME | ERR_UNDVAR); 406 } 407 408 int 409 prefix(sub, str) 410 register Char *sub, *str; 411 { 412 413 for (;;) { 414 if (*sub == 0) 415 return (1); 416 if (*str == 0) 417 return (0); 418 if (*sub++ != *str++) 419 return (0); 420 } 421 } 422