Commit | Line | Data |
---|---|---|
c75047d9 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 | } | |
46 | dp = cp; | |
47 | if (i > 0) | |
48 | do | |
49 | *dp++ = 0; | |
50 | while (--i); | |
51 | return (cp); | |
52 | } | |
53 | ||
54 | cfree(p) | |
55 | char *p; | |
56 | { | |
57 | ||
58 | free(p); | |
59 | } | |
60 | ||
61 | char ** | |
62 | blkend(up) | |
63 | register char **up; | |
64 | { | |
65 | ||
66 | while (*up) | |
67 | up++; | |
68 | return (up); | |
69 | } | |
70 | ||
71 | blkpr(av) | |
72 | register int *av; | |
73 | { | |
74 | ||
75 | for (; *av; av++) { | |
76 | printf("%s", *av); | |
77 | if (av[1]) | |
78 | printf(" "); | |
79 | } | |
80 | } | |
81 | ||
82 | blklen(av) | |
83 | register char **av; | |
84 | { | |
85 | register int i = 0; | |
86 | ||
87 | while (*av++) | |
88 | i++; | |
89 | return (i); | |
90 | } | |
91 | ||
92 | char ** | |
93 | blkcpy(oav, bv) | |
94 | char **oav; | |
95 | register char **bv; | |
96 | { | |
97 | register char **av = oav; | |
98 | ||
99 | while (*av++ = *bv++) | |
100 | continue; | |
101 | return (oav); | |
102 | } | |
103 | ||
104 | char ** | |
105 | blkcat(up, vp) | |
106 | char **up, **vp; | |
107 | { | |
108 | ||
109 | blkcpy(blkend(up), vp); | |
110 | return (up); | |
111 | } | |
112 | ||
113 | blkfree(av0) | |
114 | char **av0; | |
115 | { | |
116 | register char **av = av0; | |
117 | ||
118 | while (*av) | |
119 | xfree(*av++); | |
120 | xfree(av0); | |
121 | } | |
122 | ||
123 | char ** | |
124 | saveblk(v) | |
125 | register char **v; | |
126 | { | |
127 | register int len = blklen(v) + 1; | |
128 | register char **newv = (char **) calloc(len, sizeof (char **)); | |
129 | char **onewv = newv; | |
130 | ||
131 | while (*v) | |
132 | *newv++ = savestr(*v++); | |
133 | return (onewv); | |
134 | } | |
135 | ||
136 | char * | |
137 | strspl(cp, dp) | |
138 | register char *cp, *dp; | |
139 | { | |
140 | register char *ep = calloc(1, strlen(cp) + strlen(dp) + 1); | |
141 | ||
142 | strcpy(ep, cp); | |
143 | return (strcat(ep, dp)); | |
144 | } | |
145 | ||
146 | char ** | |
147 | blkspl(up, vp) | |
148 | register char **up, **vp; | |
149 | { | |
150 | register char **wp = (char **) calloc(blklen(up) + blklen(vp) + 1, sizeof (char **)); | |
151 | ||
152 | blkcpy(wp, up); | |
153 | return (blkcat(wp, vp)); | |
154 | } | |
155 | ||
156 | lastchr(cp) | |
157 | register char *cp; | |
158 | { | |
159 | ||
160 | if (!*cp) | |
161 | return (0); | |
162 | while (cp[1]) | |
163 | cp++; | |
164 | return (*cp); | |
165 | } | |
166 | ||
167 | /* | |
168 | * This routine is called after an error to close up | |
169 | * any units which may have been left open accidentally. | |
170 | */ | |
171 | closem() | |
172 | { | |
173 | register int f; | |
174 | ||
175 | for (f = 0; f < NOFILE; f++) | |
176 | if (f != SHIN && f != SHOUT && f != SHDIAG && f != OLDSTD) | |
177 | close(f); | |
178 | } | |
179 | ||
180 | /* | |
181 | * Close files before executing a file. | |
182 | * We could be MUCH more intelligent, since (on a version 7 system) | |
183 | * we need only close files here during a source, the other | |
184 | * shell fd's being in units 16-19 which are closed automatically! | |
185 | */ | |
186 | closech() | |
187 | { | |
188 | register int f; | |
189 | ||
190 | if (didcch) | |
191 | return; | |
192 | didcch = 1; | |
193 | SHIN = 0; SHOUT = 1; SHDIAG = 2; OLDSTD = 0; | |
194 | for (f = 3; f < NOFILE; f++) | |
195 | close(f); | |
196 | } | |
197 | ||
198 | donefds() | |
199 | { | |
200 | ||
201 | close(0), close(1), close(2); | |
202 | didfds = 0; | |
203 | } | |
204 | ||
205 | /* | |
206 | * Move descriptor i to j. | |
207 | * If j is -1 then we just want to get i to a safe place, | |
208 | * i.e. to a unit > 2. This also happens in dcopy. | |
209 | */ | |
210 | dmove(i, j) | |
211 | register int i, j; | |
212 | { | |
213 | ||
214 | if (i == j || i < 0) | |
215 | return (i); | |
216 | j = dcopy(i, j); | |
217 | if (j != i) | |
218 | close(i); | |
219 | return (j); | |
220 | } | |
221 | ||
222 | dcopy(i, j) | |
223 | register int i, j; | |
224 | { | |
225 | ||
226 | if (i == j || i < 0 || j < 0 && i > 2) | |
227 | return (i); | |
228 | close(j); | |
229 | return (renum(i, j)); | |
230 | } | |
231 | ||
232 | renum(i, j) | |
233 | register int i, j; | |
234 | { | |
235 | register int k = dup(i); | |
236 | ||
237 | if (k < 0) | |
238 | return (-1); | |
239 | if (j == -1 && k > 2) | |
240 | return (k); | |
241 | if (k != j) { | |
242 | j = renum(k, j); | |
243 | close(k); | |
244 | return (j); | |
245 | } | |
246 | return (k); | |
247 | } | |
248 | ||
249 | copy(to, from, size) | |
250 | register char *to, *from; | |
251 | register int size; | |
252 | { | |
253 | ||
254 | if (size) | |
255 | do | |
256 | *to++ = *from++; | |
257 | while (--size != 0); | |
258 | } | |
259 | ||
260 | /* | |
261 | * Left shift a command argument list, discarding | |
262 | * the first c arguments. Used in "shift" commands | |
263 | * as well as by commands like "repeat". | |
264 | */ | |
265 | lshift(v, c) | |
266 | register char **v; | |
267 | register int c; | |
268 | { | |
269 | register char **u = v; | |
270 | ||
271 | while (*u && --c >= 0) | |
272 | xfree(*u++); | |
273 | blkcpy(v, u); | |
274 | } | |
275 | ||
276 | number(cp) | |
277 | char *cp; | |
278 | { | |
279 | ||
280 | if (*cp == '-') { | |
281 | cp++; | |
282 | if (!digit(*cp++)) | |
283 | return (0); | |
284 | } | |
285 | while (*cp && digit(*cp)) | |
286 | cp++; | |
287 | return (*cp == 0); | |
288 | } | |
289 | ||
290 | char ** | |
291 | copyblk(v) | |
292 | register char **v; | |
293 | { | |
294 | register char **nv = (char **) calloc(blklen(v) + 1, sizeof (char **)); | |
295 | ||
296 | return (blkcpy(nv, v)); | |
297 | } | |
298 | ||
299 | char * | |
300 | strend(cp) | |
301 | register char *cp; | |
302 | { | |
303 | ||
304 | while (*cp) | |
305 | cp++; | |
306 | return (cp); | |
307 | } | |
308 | ||
309 | char * | |
310 | strip(cp) | |
311 | char *cp; | |
312 | { | |
313 | register char *dp = cp; | |
314 | ||
315 | while (*dp++ &= TRIM) | |
316 | continue; | |
317 | return (cp); | |
318 | } | |
319 | ||
320 | udvar(name) | |
321 | char *name; | |
322 | { | |
323 | ||
324 | setname(name); | |
325 | bferr("Undefined variable"); | |
326 | } |