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1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Kenneth Almquist. | |
7 | * | |
8 | * %sccs.include.redist.c% | |
9 | */ | |
10 | ||
11 | #ifndef lint | |
838b4aae | 12 | static char sccsid[] = "@(#)options.c 5.4 (Berkeley) %G%"; |
6af41caa KB |
13 | #endif /* not lint */ |
14 | ||
15 | #include "shell.h" | |
16 | #define DEFINE_OPTIONS | |
17 | #include "options.h" | |
18 | #undef DEFINE_OPTIONS | |
19 | #include "nodes.h" /* for other header files */ | |
20 | #include "eval.h" | |
21 | #include "jobs.h" | |
22 | #include "input.h" | |
23 | #include "output.h" | |
24 | #include "trap.h" | |
25 | #include "var.h" | |
26 | #include "memalloc.h" | |
27 | #include "error.h" | |
28 | #include "mystring.h" | |
29 | ||
30 | char *arg0; /* value of $0 */ | |
31 | struct shparam shellparam; /* current positional parameters */ | |
32 | char **argptr; /* argument list for builtin commands */ | |
33 | char *optarg; /* set by nextopt (like getopt) */ | |
34 | char *optptr; /* used by nextopt */ | |
35 | ||
36 | char *minusc; /* argument to -c option */ | |
37 | ||
38 | ||
39 | #ifdef __STDC__ | |
40 | STATIC void options(int); | |
41 | STATIC void setoption(int, int); | |
838b4aae | 42 | STATIC void minus_o(char *, int); |
6af41caa KB |
43 | #else |
44 | STATIC void options(); | |
45 | STATIC void setoption(); | |
838b4aae | 46 | STATIC void minus_o(); |
6af41caa KB |
47 | #endif |
48 | ||
49 | ||
50 | ||
51 | /* | |
52 | * Process the shell command line arguments. | |
53 | */ | |
54 | ||
55 | void | |
56 | procargs(argc, argv) | |
57 | char **argv; | |
58 | { | |
838b4aae | 59 | int i; |
6af41caa KB |
60 | |
61 | argptr = argv; | |
62 | if (argc > 0) | |
63 | argptr++; | |
838b4aae MT |
64 | for (i = 0; i < NOPTS; i++) |
65 | optlist[i].val = 2; | |
6af41caa KB |
66 | options(1); |
67 | if (*argptr == NULL && minusc == NULL) | |
68 | sflag = 1; | |
69 | if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1)) | |
70 | iflag = 1; | |
838b4aae MT |
71 | if (mflag == 2) |
72 | mflag = iflag; | |
73 | for (i = 0; i < NOPTS; i++) | |
74 | if (optlist[i].val == 2) | |
75 | optlist[i].val = 0; | |
6af41caa KB |
76 | arg0 = argv[0]; |
77 | if (sflag == 0 && minusc == NULL) { | |
78 | commandname = arg0 = *argptr++; | |
79 | setinputfile(commandname, 0); | |
80 | } | |
81 | shellparam.p = argptr; | |
82 | /* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */ | |
83 | while (*argptr) { | |
84 | shellparam.nparam++; | |
85 | argptr++; | |
86 | } | |
838b4aae | 87 | optschanged(); |
6af41caa KB |
88 | } |
89 | ||
90 | ||
838b4aae MT |
91 | optschanged() { |
92 | setinteractive(iflag); | |
93 | histedit(); | |
94 | setjobctl(mflag); | |
95 | } | |
6af41caa KB |
96 | |
97 | /* | |
98 | * Process shell options. The global variable argptr contains a pointer | |
99 | * to the argument list; we advance it past the options. | |
100 | */ | |
101 | ||
102 | STATIC void | |
103 | options(cmdline) { | |
104 | register char *p; | |
105 | int val; | |
106 | int c; | |
107 | ||
ddba57cd MT |
108 | if (cmdline) |
109 | minusc = NULL; | |
6af41caa KB |
110 | while ((p = *argptr) != NULL) { |
111 | argptr++; | |
112 | if ((c = *p++) == '-') { | |
113 | val = 1; | |
ddba57cd MT |
114 | if (p[0] == '\0' || p[0] == '-' && p[1] == '\0') { |
115 | if (!cmdline) { | |
116 | /* "-" means turn off -x and -v */ | |
117 | if (p[0] == '\0') | |
118 | xflag = vflag = 0; | |
119 | /* "--" means reset params */ | |
120 | else if (*argptr == NULL) | |
121 | setparam(argptr); | |
122 | } | |
6af41caa | 123 | break; /* "-" or "--" terminates options */ |
ddba57cd | 124 | } |
6af41caa KB |
125 | } else if (c == '+') { |
126 | val = 0; | |
127 | } else { | |
128 | argptr--; | |
129 | break; | |
130 | } | |
131 | while ((c = *p++) != '\0') { | |
132 | if (c == 'c' && cmdline) { | |
133 | char *q; | |
ddba57cd | 134 | #ifdef NOHACK /* removing this code allows sh -ce 'foo' for compat */ |
6af41caa KB |
135 | if (*p == '\0') |
136 | #endif | |
137 | q = *argptr++; | |
138 | if (q == NULL || minusc != NULL) | |
139 | error("Bad -c option"); | |
140 | minusc = q; | |
141 | #ifdef NOHACK | |
142 | break; | |
143 | #endif | |
838b4aae MT |
144 | } else if (c == 'o') { |
145 | minus_o(*argptr, val); | |
146 | if (*argptr) | |
147 | argptr++; | |
6af41caa KB |
148 | } else { |
149 | setoption(c, val); | |
150 | } | |
151 | } | |
6af41caa KB |
152 | } |
153 | } | |
154 | ||
838b4aae MT |
155 | STATIC void |
156 | minus_o(name, val) | |
157 | char *name; | |
158 | int val; | |
159 | { | |
160 | int i; | |
161 | ||
162 | if (name == NULL) { | |
163 | out1str("Current option settings\n"); | |
164 | for (i = 0; i < NOPTS; i++) | |
165 | out1fmt("%-16s%s\n", optlist[i].name, | |
166 | optlist[i].val ? "on" : "off"); | |
167 | } else { | |
168 | for (i = 0; i < NOPTS; i++) | |
169 | if (equal(name, optlist[i].name)) { | |
170 | setoption(optlist[i].letter, val); | |
171 | return; | |
172 | } | |
173 | error("Illegal option -o %s", name); | |
174 | } | |
175 | } | |
176 | ||
6af41caa KB |
177 | |
178 | STATIC void | |
179 | setoption(flag, val) | |
180 | char flag; | |
181 | int val; | |
182 | { | |
838b4aae MT |
183 | int i; |
184 | ||
185 | for (i = 0; i < NOPTS; i++) | |
186 | if (optlist[i].letter == flag) { | |
187 | optlist[i].val = val; | |
188 | if (val) { | |
189 | /* #%$ hack for ksh semantics */ | |
190 | if (flag == 'V') | |
191 | Eflag = 0; | |
192 | else if (flag == 'E') | |
193 | Vflag = 0; | |
194 | } | |
195 | return; | |
196 | } | |
197 | error("Illegal option -%c", flag); | |
6af41caa KB |
198 | } |
199 | ||
200 | ||
201 | ||
202 | #ifdef mkinit | |
203 | INCLUDE "options.h" | |
204 | ||
205 | SHELLPROC { | |
838b4aae MT |
206 | int i; |
207 | ||
208 | for (i = 0; i < NOPTS; i++) | |
209 | optlist[i].val = 0; | |
210 | optschanged(); | |
6af41caa | 211 | |
6af41caa KB |
212 | } |
213 | #endif | |
214 | ||
215 | ||
216 | /* | |
217 | * Set the shell parameters. | |
218 | */ | |
219 | ||
220 | void | |
221 | setparam(argv) | |
222 | char **argv; | |
223 | { | |
224 | char **newparam; | |
225 | char **ap; | |
226 | int nparam; | |
227 | ||
228 | for (nparam = 0 ; argv[nparam] ; nparam++); | |
229 | ap = newparam = ckmalloc((nparam + 1) * sizeof *ap); | |
230 | while (*argv) { | |
231 | *ap++ = savestr(*argv++); | |
232 | } | |
233 | *ap = NULL; | |
234 | freeparam(&shellparam); | |
235 | shellparam.malloc = 1; | |
236 | shellparam.nparam = nparam; | |
237 | shellparam.p = newparam; | |
238 | shellparam.optnext = NULL; | |
239 | } | |
240 | ||
241 | ||
242 | /* | |
243 | * Free the list of positional parameters. | |
244 | */ | |
245 | ||
246 | void | |
247 | freeparam(param) | |
248 | struct shparam *param; | |
249 | { | |
250 | char **ap; | |
251 | ||
252 | if (param->malloc) { | |
253 | for (ap = param->p ; *ap ; ap++) | |
254 | ckfree(*ap); | |
255 | ckfree(param->p); | |
256 | } | |
257 | } | |
258 | ||
259 | ||
260 | ||
261 | /* | |
262 | * The shift builtin command. | |
263 | */ | |
264 | ||
265 | shiftcmd(argc, argv) char **argv; { | |
266 | int n; | |
267 | char **ap1, **ap2; | |
268 | ||
269 | n = 1; | |
270 | if (argc > 1) | |
271 | n = number(argv[1]); | |
272 | if (n > shellparam.nparam) | |
273 | n = shellparam.nparam; | |
274 | INTOFF; | |
275 | shellparam.nparam -= n; | |
276 | for (ap1 = shellparam.p ; --n >= 0 ; ap1++) { | |
277 | if (shellparam.malloc) | |
278 | ckfree(*ap1); | |
279 | } | |
280 | ap2 = shellparam.p; | |
281 | while ((*ap2++ = *ap1++) != NULL); | |
282 | shellparam.optnext = NULL; | |
283 | INTON; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | ||
288 | ||
289 | /* | |
290 | * The set command builtin. | |
291 | */ | |
292 | ||
293 | setcmd(argc, argv) char **argv; { | |
294 | if (argc == 1) | |
295 | return showvarscmd(argc, argv); | |
296 | INTOFF; | |
297 | options(0); | |
838b4aae | 298 | optschanged(); |
6af41caa KB |
299 | if (*argptr != NULL) { |
300 | setparam(argptr); | |
301 | } | |
302 | INTON; | |
303 | return 0; | |
304 | } | |
305 | ||
306 | ||
307 | /* | |
308 | * The getopts builtin. Shellparam.optnext points to the next argument | |
309 | * to be processed. Shellparam.optptr points to the next character to | |
310 | * be processed in the current argument. If shellparam.optnext is NULL, | |
311 | * then it's the first time getopts has been called. | |
312 | */ | |
313 | ||
314 | getoptscmd(argc, argv) char **argv; { | |
315 | register char *p, *q; | |
316 | char c; | |
317 | char s[10]; | |
318 | ||
319 | if (argc != 3) | |
320 | error("Usage: getopts optstring var"); | |
321 | if (shellparam.optnext == NULL) { | |
322 | shellparam.optnext = shellparam.p; | |
323 | shellparam.optptr = NULL; | |
324 | } | |
325 | if ((p = shellparam.optptr) == NULL || *p == '\0') { | |
326 | p = *shellparam.optnext; | |
327 | if (p == NULL || *p != '-' || *++p == '\0') { | |
328 | atend: | |
329 | fmtstr(s, 10, "%d", shellparam.optnext - shellparam.p + 1); | |
330 | setvar("OPTIND", s, 0); | |
331 | shellparam.optnext = NULL; | |
332 | return 1; | |
333 | } | |
334 | shellparam.optnext++; | |
335 | if (p[0] == '-' && p[1] == '\0') /* check for "--" */ | |
336 | goto atend; | |
337 | } | |
338 | c = *p++; | |
339 | for (q = argv[1] ; *q != c ; ) { | |
340 | if (*q == '\0') { | |
341 | out1fmt("Illegal option -%c\n", c); | |
342 | c = '?'; | |
343 | goto out; | |
344 | } | |
345 | if (*++q == ':') | |
346 | q++; | |
347 | } | |
348 | if (*++q == ':') { | |
349 | if (*p == '\0' && (p = *shellparam.optnext) == NULL) { | |
350 | out1fmt("No arg for -%c option\n", c); | |
351 | c = '?'; | |
352 | goto out; | |
353 | } | |
354 | shellparam.optnext++; | |
355 | setvar("OPTARG", p, 0); | |
356 | p = NULL; | |
357 | } | |
358 | out: | |
359 | shellparam.optptr = p; | |
360 | s[0] = c; | |
361 | s[1] = '\0'; | |
362 | setvar(argv[2], s, 0); | |
363 | return 0; | |
364 | } | |
365 | ||
6af41caa | 366 | /* |
838b4aae MT |
367 | * XXX - should get rid of. have all builtins use getopt(3). the |
368 | * library getopt must have the BSD extension static variable "optreset" | |
369 | * otherwise it can't be used within the shell safely. | |
370 | * | |
6af41caa KB |
371 | * Standard option processing (a la getopt) for builtin routines. The |
372 | * only argument that is passed to nextopt is the option string; the | |
ddba57cd MT |
373 | * other arguments are unnecessary. It return the character, or '\0' on |
374 | * end of input. | |
6af41caa KB |
375 | */ |
376 | ||
377 | int | |
378 | nextopt(optstring) | |
379 | char *optstring; | |
380 | { | |
381 | register char *p, *q; | |
382 | char c; | |
383 | ||
384 | if ((p = optptr) == NULL || *p == '\0') { | |
385 | p = *argptr; | |
386 | if (p == NULL || *p != '-' || *++p == '\0') | |
ddba57cd | 387 | return '\0'; |
6af41caa KB |
388 | argptr++; |
389 | if (p[0] == '-' && p[1] == '\0') /* check for "--" */ | |
ddba57cd | 390 | return '\0'; |
6af41caa KB |
391 | } |
392 | c = *p++; | |
393 | for (q = optstring ; *q != c ; ) { | |
394 | if (*q == '\0') | |
395 | error("Illegal option -%c", c); | |
396 | if (*++q == ':') | |
397 | q++; | |
398 | } | |
399 | if (*++q == ':') { | |
400 | if (*p == '\0' && (p = *argptr++) == NULL) | |
401 | error("No arg for -%c option", c); | |
402 | optarg = p; | |
403 | p = NULL; | |
404 | } | |
405 | optptr = p; | |
406 | return c; | |
407 | } |