1 /* $NetBSD: misc.c,v 1.20 2013/07/16 17:47:43 christos 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 1.20 2013/07/16 17:47:43 christos Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <sys/param.h>
42
43 #include <stdarg.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <unistd.h>
47 #include <fcntl.h>
48
49 #include "csh.h"
50 #include "extern.h"
51
52 static int renum(int, int);
53
54 int
any(const char * s,int c)55 any(const char *s, int c)
56 {
57 if (!s)
58 return (0); /* Check for nil pointer */
59 while (*s)
60 if (*s++ == c)
61 return (1);
62 return (0);
63 }
64
65 char *
strsave(const char * s)66 strsave(const char *s)
67 {
68 const char *n;
69 char *p, *r;
70
71 if (s == NULL)
72 s = "";
73 for (n = s; *n++;)
74 continue;
75 r = p = xmalloc((size_t)(n - s) * sizeof(*p));
76 while ((*p++ = *s++) != '\0')
77 continue;
78 return (r);
79 }
80
81 Char **
blkend(Char ** up)82 blkend(Char **up)
83 {
84 while (*up)
85 up++;
86 return (up);
87 }
88
89
90 void
blkpr(FILE * fp,Char ** av)91 blkpr(FILE *fp, Char **av)
92 {
93 for (; *av; av++) {
94 (void)fprintf(fp, "%s", vis_str(*av));
95 if (av[1])
96 (void)fprintf(fp, " ");
97 }
98 }
99
100 int
blklen(Char ** av)101 blklen(Char **av)
102 {
103 int i;
104
105 i = 0;
106 while (*av++)
107 i++;
108 return (i);
109 }
110
111 Char **
blkcpy(Char ** oav,Char ** bv)112 blkcpy(Char **oav, Char **bv)
113 {
114 Char **av;
115
116 av = oav;
117 while ((*av++ = *bv++) != NULL)
118 continue;
119 return (oav);
120 }
121
122 Char **
blkcat(Char ** up,Char ** vp)123 blkcat(Char **up, Char **vp)
124 {
125 (void)blkcpy(blkend(up), vp);
126 return (up);
127 }
128
129 void
blkfree(Char ** av0)130 blkfree(Char **av0)
131 {
132 Char **av;
133
134 av = av0;
135 if (!av0)
136 return;
137 for (; *av; av++)
138 xfree((ptr_t) * av);
139 xfree((ptr_t) av0);
140 }
141
142 Char **
saveblk(Char ** v)143 saveblk(Char **v)
144 {
145 Char **newv, **onewv;
146
147 if (v == NULL)
148 return NULL;
149
150 newv = xcalloc((size_t)(blklen(v) + 1), sizeof(*newv));
151 onewv = newv;
152 while (*v)
153 *newv++ = Strsave(*v++);
154 return (onewv);
155 }
156
157 #ifdef NOTUSED
158 char *
strstr(char * s,char * t)159 strstr(char *s, char *t)
160 {
161 do {
162 char *ss;
163 char *tt;
164
165 ss = s;
166 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 *
strspl(char * cp,char * dp)180 strspl(char *cp, char *dp)
181 {
182 char *ep, *p, *q;
183
184 if (!cp)
185 cp = "";
186 if (!dp)
187 dp = "";
188 for (p = cp; *p++;)
189 continue;
190 for (q = dp; *q++;)
191 continue;
192 ep = xmalloc((size_t)(((p - cp) + (q - dp) - 1) * sizeof(*ep)));
193 for (p = ep, q = cp; *p++ = *q++;)
194 continue;
195 for (p--, q = dp; *p++ = *q++;)
196 continue;
197 return (ep);
198 }
199
200 #endif
201
202 Char **
blkspl(Char ** up,Char ** vp)203 blkspl(Char **up, Char **vp)
204 {
205 Char **wp;
206
207 wp = xcalloc((size_t)(blklen(up) + blklen(vp) + 1), sizeof(*wp));
208 (void)blkcpy(wp, up);
209 return (blkcat(wp, vp));
210 }
211
212 Char
lastchr(Char * cp)213 lastchr(Char *cp)
214 {
215 if (!cp)
216 return (0);
217 if (!*cp)
218 return (0);
219 while (cp[1])
220 cp++;
221 return (*cp);
222 }
223
224 /*
225 * This routine is called after an error to close up
226 * any units which may have been left open accidentally.
227 */
228 void
closem(void)229 closem(void)
230 {
231 int f;
232 int nofile;
233
234 #ifdef F_CLOSEM
235 nofile = FOLDSTD + 1;
236 if (fcntl(nofile, F_CLOSEM, 0) == -1)
237 #endif
238 nofile = NOFILE;
239
240 for (f = 0; f < nofile; f++)
241 if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD &&
242 f != FSHTTY)
243 (void) close(f);
244 }
245
246 void
donefds(void)247 donefds(void)
248 {
249 (void)close(0);
250 (void)close(1);
251 (void)close(2);
252
253 didfds = 0;
254 }
255
256 /*
257 * Move descriptor i to j.
258 * If j is -1 then we just want to get i to a safe place,
259 * i.e. to a unit > 2. This also happens in dcopy.
260 */
261 int
dmove(int i,int j)262 dmove(int i, int j)
263 {
264 if (i == j || i < 0)
265 return (i);
266 if (j >= 0) {
267 (void)dup2(i, j);
268 if (j != i)
269 (void)close(i);
270 return (j);
271 }
272 j = dcopy(i, j);
273 if (j != i)
274 (void)close(i);
275 return (j);
276 }
277
278 int
dcopy(int i,int j)279 dcopy(int i, int j)
280 {
281 if (i == j || i < 0 || (j < 0 && i > 2))
282 return (i);
283 if (j >= 0) {
284 (void)dup2(i, j);
285 return (j);
286 }
287 return (renum(i, j));
288 }
289
290 static int
renum(int i,int j)291 renum(int i, int j)
292 {
293 int k;
294
295 k = dup(i);
296 if (k < 0)
297 return (-1);
298 if (j == -1 && k > 2)
299 return (k);
300 if (k != j) {
301 j = renum(k, j);
302 (void)close(k);
303 return (j);
304 }
305 return (k);
306 }
307
308 /*
309 * Left shift a command argument list, discarding
310 * the first c arguments. Used in "shift" commands
311 * as well as by commands like "repeat".
312 */
313 void
lshift(Char ** v,size_t c)314 lshift(Char **v, size_t c)
315 {
316 Char **u;
317
318 for (u = v; *u && c-- > 0; u++)
319 xfree((ptr_t) *u);
320 (void)blkcpy(v, u);
321 }
322
323 int
number(Char * cp)324 number(Char *cp)
325 {
326 if (!cp)
327 return(0);
328 if (*cp == '-') {
329 cp++;
330 if (!Isdigit(*cp))
331 return (0);
332 cp++;
333 }
334 while (*cp && Isdigit(*cp))
335 cp++;
336 return (*cp == 0);
337 }
338
339 Char **
copyblk(Char ** v)340 copyblk(Char **v)
341 {
342 Char **nv;
343
344 nv = xcalloc((size_t)(blklen(v) + 1), sizeof(*nv));
345
346 return (blkcpy(nv, v));
347 }
348
349 #ifndef SHORT_STRINGS
350 char *
strend(char * cp)351 strend(char *cp)
352 {
353 if (!cp)
354 return (cp);
355 while (*cp)
356 cp++;
357 return (cp);
358 }
359
360 #endif /* SHORT_STRINGS */
361
362 Char *
strip(Char * cp)363 strip(Char *cp)
364 {
365 Char *dp;
366
367 dp = cp;
368 if (!cp)
369 return (cp);
370 while ((*dp++ &= TRIM) != '\0')
371 continue;
372 return (cp);
373 }
374
375 Char *
quote(Char * cp)376 quote(Char *cp)
377 {
378 Char *dp;
379
380 dp = cp;
381 if (!cp)
382 return (cp);
383 while (*dp != '\0')
384 *dp++ |= QUOTE;
385 return (cp);
386 }
387
388 void
udvar(Char * name)389 udvar(Char *name)
390 {
391 setname(vis_str(name));
392 stderror(ERR_NAME | ERR_UNDVAR);
393 /* NOTREACHED */
394 }
395
396 int
prefix(Char * sub,Char * str)397 prefix(Char *sub, Char *str)
398 {
399 for (;;) {
400 if (*sub == 0)
401 return (1);
402 if (*str == 0)
403 return (0);
404 if (*sub++ != *str++)
405 return (0);
406 }
407 }
408