Commit | Line | Data |
---|---|---|
b898b9e0 BJ |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | #include "sh.h" | |
3 | ||
4 | /* | |
5 | * C Shell | |
6 | */ | |
7 | ||
8 | letter(c) | |
9 | register char c; | |
10 | { | |
11 | ||
12 | return (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c == '_'); | |
13 | } | |
14 | ||
15 | digit(c) | |
16 | register char c; | |
17 | { | |
18 | ||
19 | return (c >= '0' && c <= '9'); | |
20 | } | |
21 | ||
22 | any(c, s) | |
23 | register int c; | |
24 | register char *s; | |
25 | { | |
26 | ||
27 | while (*s) | |
28 | if (*s++ == c) | |
29 | return(1); | |
30 | return(0); | |
31 | } | |
32 | ||
33 | char * | |
34 | calloc(i, j) | |
35 | register int i; | |
36 | int j; | |
37 | { | |
38 | register char *cp, *dp; | |
39 | ||
40 | i *= j; | |
41 | cp = (char *) malloc(i); | |
42 | if (cp == 0) { | |
43 | child++; | |
44 | error("Out of memory"); | |
45 | chdir("/usr/bill/cshcore"); | |
46 | abort(); | |
47 | } | |
48 | dp = cp; | |
49 | if (i > 0) | |
50 | do | |
51 | *dp++ = 0; | |
52 | while (--i); | |
53 | return (cp); | |
54 | } | |
55 | ||
56 | cfree(p) | |
57 | char *p; | |
58 | { | |
59 | ||
60 | free(p); | |
61 | } | |
62 | ||
63 | char ** | |
64 | blkend(up) | |
65 | register char **up; | |
66 | { | |
67 | ||
68 | while (*up) | |
69 | up++; | |
70 | return (up); | |
71 | } | |
72 | ||
73 | blkpr(av) | |
74 | register int *av; | |
75 | { | |
76 | ||
77 | for (; *av; av++) { | |
78 | printf("%s", *av); | |
79 | if (av[1]) | |
80 | printf(" "); | |
81 | } | |
82 | } | |
83 | ||
84 | blklen(av) | |
85 | register char **av; | |
86 | { | |
87 | register int i = 0; | |
88 | ||
89 | while (*av++) | |
90 | i++; | |
91 | return (i); | |
92 | } | |
93 | ||
94 | char ** | |
95 | blkcpy(oav, bv) | |
96 | char **oav; | |
97 | register char **bv; | |
98 | { | |
99 | register char **av = oav; | |
100 | ||
101 | while (*av++ = *bv++) | |
102 | continue; | |
103 | return (oav); | |
104 | } | |
105 | ||
106 | char ** | |
107 | blkcat(up, vp) | |
108 | char **up, **vp; | |
109 | { | |
110 | ||
111 | blkcpy(blkend(up), vp); | |
112 | return (up); | |
113 | } | |
114 | ||
115 | blkfree(av0) | |
116 | char **av0; | |
117 | { | |
118 | register char **av = av0; | |
119 | ||
120 | while (*av) | |
121 | xfree(*av++); | |
122 | xfree(av0); | |
123 | } | |
124 | ||
125 | char ** | |
126 | saveblk(v) | |
127 | register char **v; | |
128 | { | |
129 | register int len = blklen(v) + 1; | |
130 | register char **newv = (char **) calloc(len, sizeof (char **)); | |
131 | char **onewv = newv; | |
132 | ||
133 | while (*v) | |
134 | *newv++ = savestr(*v++); | |
135 | return (onewv); | |
136 | } | |
137 | ||
138 | char * | |
139 | strspl(cp, dp) | |
140 | register char *cp, *dp; | |
141 | { | |
142 | register char *ep = calloc(1, strlen(cp) + strlen(dp) + 1); | |
143 | ||
144 | strcpy(ep, cp); | |
145 | return (strcat(ep, dp)); | |
146 | } | |
147 | ||
148 | char ** | |
149 | blkspl(up, vp) | |
150 | register char **up, **vp; | |
151 | { | |
152 | register char **wp = (char **) calloc(blklen(up) + blklen(vp) + 1, sizeof (char **)); | |
153 | ||
154 | blkcpy(wp, up); | |
155 | return (blkcat(wp, vp)); | |
156 | } | |
157 | ||
158 | lastchr(cp) | |
159 | register char *cp; | |
160 | { | |
161 | ||
162 | if (!*cp) | |
163 | return (0); | |
164 | while (cp[1]) | |
165 | cp++; | |
166 | return (*cp); | |
167 | } | |
168 | ||
169 | /* | |
170 | * This routine is called after an error to close up | |
171 | * any units which may have been left open accidentally. | |
172 | */ | |
173 | closem() | |
174 | { | |
175 | register int f; | |
176 | ||
177 | for (f = 0; f < NOFILE; f++) | |
178 | if (f != SHIN && f != SHOUT && f != SHDIAG && f != OLDSTD) | |
179 | close(f); | |
180 | } | |
181 | ||
182 | /* | |
183 | * Close files before executing a file. | |
184 | * We could be MUCH more intelligent, since (on a version 7 system) | |
185 | * we need only close files here during a source, the other | |
186 | * shell fd's being in units 16-19 which are closed automatically! | |
187 | */ | |
188 | closech() | |
189 | { | |
190 | register int f; | |
191 | ||
192 | if (didcch) | |
193 | return; | |
194 | didcch = 1; | |
195 | SHIN = 0; SHOUT = 1; SHDIAG = 2; OLDSTD = 0; | |
196 | for (f = 3; f < NOFILE; f++) | |
197 | close(f); | |
198 | } | |
199 | ||
200 | donefds() | |
201 | { | |
202 | ||
203 | close(0), close(1), close(2); | |
204 | didfds = 0; | |
205 | } | |
206 | ||
207 | /* | |
208 | * Move descriptor i to j. | |
209 | * If j is -1 then we just want to get i to a safe place, | |
210 | * i.e. to a unit > 2. This also happens in dcopy. | |
211 | */ | |
212 | dmove(i, j) | |
213 | register int i, j; | |
214 | { | |
215 | ||
216 | if (i == j || i < 0) | |
217 | return (i); | |
218 | #ifdef V7 | |
219 | if (j >= 0) { | |
220 | dup2(i, j); | |
221 | return (j); | |
222 | } else | |
223 | #endif | |
224 | j = dcopy(i, j); | |
225 | if (j != i) | |
226 | close(i); | |
227 | return (j); | |
228 | } | |
229 | ||
230 | dcopy(i, j) | |
231 | register int i, j; | |
232 | { | |
233 | ||
234 | if (i == j || i < 0 || j < 0 && i > 2) | |
235 | return (i); | |
236 | #ifdef V7 | |
237 | if (j >= 0) { | |
238 | dup2(i, j); | |
239 | return (j); | |
240 | } | |
241 | #endif | |
242 | close(j); | |
243 | return (renum(i, j)); | |
244 | } | |
245 | ||
246 | renum(i, j) | |
247 | register int i, j; | |
248 | { | |
249 | register int k = dup(i); | |
250 | ||
251 | if (k < 0) | |
252 | return (-1); | |
253 | if (j == -1 && k > 2) | |
254 | return (k); | |
255 | if (k != j) { | |
256 | j = renum(k, j); | |
257 | close(k); | |
258 | return (j); | |
259 | } | |
260 | return (k); | |
261 | } | |
262 | ||
263 | copy(to, from, size) | |
264 | register char *to, *from; | |
265 | register int size; | |
266 | { | |
267 | ||
268 | if (size) | |
269 | do | |
270 | *to++ = *from++; | |
271 | while (--size != 0); | |
272 | } | |
273 | ||
274 | /* | |
275 | * Left shift a command argument list, discarding | |
276 | * the first c arguments. Used in "shift" commands | |
277 | * as well as by commands like "repeat". | |
278 | */ | |
279 | lshift(v, c) | |
280 | register char **v; | |
281 | register int c; | |
282 | { | |
283 | register char **u = v; | |
284 | ||
285 | while (*u && --c >= 0) | |
286 | xfree(*u++); | |
287 | blkcpy(v, u); | |
288 | } | |
289 | ||
290 | number(cp) | |
291 | char *cp; | |
292 | { | |
293 | ||
294 | if (*cp == '-') { | |
295 | cp++; | |
296 | if (!digit(*cp++)) | |
297 | return (0); | |
298 | } | |
299 | while (*cp && digit(*cp)) | |
300 | cp++; | |
301 | return (*cp == 0); | |
302 | } | |
303 | ||
304 | char ** | |
305 | copyblk(v) | |
306 | register char **v; | |
307 | { | |
308 | register char **nv = (char **) calloc(blklen(v) + 1, sizeof (char **)); | |
309 | ||
310 | return (blkcpy(nv, v)); | |
311 | } | |
312 | ||
313 | char * | |
314 | strend(cp) | |
315 | register char *cp; | |
316 | { | |
317 | ||
318 | while (*cp) | |
319 | cp++; | |
320 | return (cp); | |
321 | } | |
322 | ||
323 | char * | |
324 | strip(cp) | |
325 | char *cp; | |
326 | { | |
327 | register char *dp = cp; | |
328 | ||
329 | while (*dp++ &= TRIM) | |
330 | continue; | |
331 | return (cp); | |
332 | } | |
333 | ||
334 | udvar(name) | |
335 | char *name; | |
336 | { | |
337 | ||
338 | setname(name); | |
339 | bferr("Undefined variable"); | |
340 | } |