misc.c revision 1.14 1 /* $NetBSD: misc.c,v 1.14 2003/08/07 09:05:06 agc 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 5/31/93";
36 #else
37 __RCSID("$NetBSD: misc.c,v 1.14 2003/08/07 09:05:06 agc Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <sys/param.h>
42
43 #include <stdarg.h>
44 #include <stdlib.h>
45 #include <unistd.h>
46
47 #include "csh.h"
48 #include "extern.h"
49
50 static int renum(int, int);
51
52 int
53 any(char *s, int c)
54 {
55 if (!s)
56 return (0); /* Check for nil pointer */
57 while (*s)
58 if (*s++ == c)
59 return (1);
60 return (0);
61 }
62
63 char *
64 strsave(char *s)
65 {
66 char *n, *p;
67
68 if (s == NULL)
69 s = "";
70 for (p = s; *p++;)
71 continue;
72 n = p = (char *)xmalloc((size_t)((p - s) * sizeof(char)));
73 while ((*p++ = *s++) != '\0')
74 continue;
75 return (n);
76 }
77
78 Char **
79 blkend(Char **up)
80 {
81 while (*up)
82 up++;
83 return (up);
84 }
85
86
87 void
88 blkpr(FILE *fp, Char **av)
89 {
90 for (; *av; av++) {
91 (void)fprintf(fp, "%s", vis_str(*av));
92 if (av[1])
93 (void)fprintf(fp, " ");
94 }
95 }
96
97 int
98 blklen(Char **av)
99 {
100 int i;
101
102 i = 0;
103 while (*av++)
104 i++;
105 return (i);
106 }
107
108 Char **
109 blkcpy(Char **oav, Char **bv)
110 {
111 Char **av;
112
113 av = oav;
114 while ((*av++ = *bv++) != NULL)
115 continue;
116 return (oav);
117 }
118
119 Char **
120 blkcat(Char **up, Char **vp)
121 {
122 (void)blkcpy(blkend(up), vp);
123 return (up);
124 }
125
126 void
127 blkfree(Char **av0)
128 {
129 Char **av;
130
131 av = av0;
132 if (!av0)
133 return;
134 for (; *av; av++)
135 xfree((ptr_t) * av);
136 xfree((ptr_t) av0);
137 }
138
139 Char **
140 saveblk(Char **v)
141 {
142 Char **newv, **onewv;
143
144 newv = (Char **)xcalloc((size_t)(blklen(v) + 1), sizeof(Char **));
145 onewv = newv;
146 while (*v)
147 *newv++ = Strsave(*v++);
148 return (onewv);
149 }
150
151 #ifdef NOTUSED
152 char *
153 strstr(char *s, char *t)
154 {
155 do {
156 char *ss;
157 char *tt;
158
159 ss = s;
160 tt = t;
161
162 do
163 if (*tt == '\0')
164 return (s);
165 while (*ss++ == *tt++);
166 } while (*s++ != '\0');
167 return (NULL);
168 }
169
170 #endif /* NOTUSED */
171
172 #ifndef SHORT_STRINGS
173 char *
174 strspl(char *cp, char *dp)
175 {
176 char *ep, *p, *q;
177
178 if (!cp)
179 cp = "";
180 if (!dp)
181 dp = "";
182 for (p = cp; *p++;)
183 continue;
184 for (q = dp; *q++;)
185 continue;
186 ep = (char *) xmalloc((size_t)(((p - cp) + (q - dp) - 1) * sizeof(char)));
187 for (p = ep, q = cp; *p++ = *q++;)
188 continue;
189 for (p--, q = dp; *p++ = *q++;)
190 continue;
191 return (ep);
192 }
193
194 #endif
195
196 Char **
197 blkspl(Char **up, Char **vp)
198 {
199 Char **wp;
200
201 wp = (Char **)xcalloc((size_t)(blklen(up) + blklen(vp) + 1),
202 sizeof(Char **));
203 (void)blkcpy(wp, up);
204 return (blkcat(wp, vp));
205 }
206
207 Char
208 lastchr(Char *cp)
209 {
210 if (!cp)
211 return (0);
212 if (!*cp)
213 return (0);
214 while (cp[1])
215 cp++;
216 return (*cp);
217 }
218
219 /*
220 * This routine is called after an error to close up
221 * any units which may have been left open accidentally.
222 */
223 void
224 closem(void)
225 {
226 int f;
227
228 for (f = 0; f < NOFILE; f++)
229 if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD &&
230 f != FSHTTY)
231 (void) close(f);
232 }
233
234 void
235 donefds(void)
236 {
237 (void)close(0);
238 (void)close(1);
239 (void)close(2);
240
241 didfds = 0;
242 }
243
244 /*
245 * Move descriptor i to j.
246 * If j is -1 then we just want to get i to a safe place,
247 * i.e. to a unit > 2. This also happens in dcopy.
248 */
249 int
250 dmove(int i, int j)
251 {
252 if (i == j || i < 0)
253 return (i);
254 if (j >= 0) {
255 (void)dup2(i, j);
256 if (j != i)
257 (void)close(i);
258 return (j);
259 }
260 j = dcopy(i, j);
261 if (j != i)
262 (void)close(i);
263 return (j);
264 }
265
266 int
267 dcopy(int i, int j)
268 {
269 if (i == j || i < 0 || (j < 0 && i > 2))
270 return (i);
271 if (j >= 0) {
272 (void)dup2(i, j);
273 return (j);
274 }
275 (void)close(j);
276 return (renum(i, j));
277 }
278
279 static int
280 renum(int i, int j)
281 {
282 int k;
283
284 k = dup(i);
285 if (k < 0)
286 return (-1);
287 if (j == -1 && k > 2)
288 return (k);
289 if (k != j) {
290 j = renum(k, j);
291 (void)close(k);
292 return (j);
293 }
294 return (k);
295 }
296
297 /*
298 * Left shift a command argument list, discarding
299 * the first c arguments. Used in "shift" commands
300 * as well as by commands like "repeat".
301 */
302 void
303 lshift(Char **v, int c)
304 {
305 Char **u;
306
307 for (u = v; *u && --c >= 0; u++)
308 xfree((ptr_t) *u);
309 (void)blkcpy(v, u);
310 }
311
312 int
313 number(Char *cp)
314 {
315 if (!cp)
316 return(0);
317 if (*cp == '-') {
318 cp++;
319 if (!Isdigit(*cp))
320 return (0);
321 cp++;
322 }
323 while (*cp && Isdigit(*cp))
324 cp++;
325 return (*cp == 0);
326 }
327
328 Char **
329 copyblk(Char **v)
330 {
331 Char **nv;
332
333 nv = (Char **)xcalloc((size_t)(blklen(v) + 1), sizeof(Char **));
334
335 return (blkcpy(nv, v));
336 }
337
338 #ifndef SHORT_STRINGS
339 char *
340 strend(char *cp)
341 {
342 if (!cp)
343 return (cp);
344 while (*cp)
345 cp++;
346 return (cp);
347 }
348
349 #endif /* SHORT_STRINGS */
350
351 Char *
352 strip(Char *cp)
353 {
354 Char *dp;
355
356 dp = cp;
357 if (!cp)
358 return (cp);
359 while ((*dp++ &= TRIM) != '\0')
360 continue;
361 return (cp);
362 }
363
364 Char *
365 quote(Char *cp)
366 {
367 Char *dp;
368
369 dp = cp;
370 if (!cp)
371 return (cp);
372 while (*dp != '\0')
373 *dp++ |= QUOTE;
374 return (cp);
375 }
376
377 void
378 udvar(Char *name)
379 {
380 setname(vis_str(name));
381 stderror(ERR_NAME | ERR_UNDVAR);
382 /* NOTREACHED */
383 }
384
385 int
386 prefix(Char *sub, Char *str)
387 {
388 for (;;) {
389 if (*sub == 0)
390 return (1);
391 if (*str == 0)
392 return (0);
393 if (*sub++ != *str++)
394 return (0);
395 }
396 }
397