Commit | Line | Data |
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299f2784 MH |
1 | /* Copyright (c) 1981 Regents of the University of California */ |
2 | static char *sccsid = "@(#)ex.c 7.1 %G%"; | |
fe4130ee MH |
3 | #include "ex.h" |
4 | #include "ex_argv.h" | |
5 | #include "ex_temp.h" | |
6 | #include "ex_tty.h" | |
7 | ||
8 | #ifdef TRACE | |
9 | char tttrace[] = { '/','d','e','v','/','t','t','y','x','x',0 }; | |
10 | #endif | |
11 | ||
12 | /* | |
13 | * The code for ex is divided as follows: | |
14 | * | |
15 | * ex.c Entry point and routines handling interrupt, hangup | |
16 | * signals; initialization code. | |
17 | * | |
18 | * ex_addr.c Address parsing routines for command mode decoding. | |
19 | * Routines to set and check address ranges on commands. | |
20 | * | |
21 | * ex_cmds.c Command mode command decoding. | |
22 | * | |
23 | * ex_cmds2.c Subroutines for command decoding and processing of | |
24 | * file names in the argument list. Routines to print | |
25 | * messages and reset state when errors occur. | |
26 | * | |
27 | * ex_cmdsub.c Subroutines which implement command mode functions | |
28 | * such as append, delete, join. | |
29 | * | |
30 | * ex_data.c Initialization of options. | |
31 | * | |
32 | * ex_get.c Command mode input routines. | |
33 | * | |
34 | * ex_io.c General input/output processing: file i/o, unix | |
35 | * escapes, filtering, source commands, preserving | |
36 | * and recovering. | |
37 | * | |
38 | * ex_put.c Terminal driving and optimizing routines for low-level | |
39 | * output (cursor-positioning); output line formatting | |
40 | * routines. | |
41 | * | |
42 | * ex_re.c Global commands, substitute, regular expression | |
43 | * compilation and execution. | |
44 | * | |
45 | * ex_set.c The set command. | |
46 | * | |
47 | * ex_subr.c Loads of miscellaneous subroutines. | |
48 | * | |
49 | * ex_temp.c Editor buffer routines for main buffer and also | |
50 | * for named buffers (Q registers if you will.) | |
51 | * | |
52 | * ex_tty.c Terminal dependent initializations from termcap | |
53 | * data base, grabbing of tty modes (at beginning | |
54 | * and after escapes). | |
55 | * | |
d266c416 MH |
56 | * ex_unix.c Routines for the ! command and its variations. |
57 | * | |
fe4130ee MH |
58 | * ex_v*.c Visual/open mode routines... see ex_v.c for a |
59 | * guide to the overall organization. | |
60 | */ | |
61 | ||
62 | /* | |
63 | * Main procedure. Process arguments and then | |
64 | * transfer control to the main command processing loop | |
d266c416 MH |
65 | * in the routine commands. We are entered as either "ex", "edit", "vi" |
66 | * or "view" and the distinction is made here. Actually, we are "vi" if | |
67 | * there is a 'v' in our name, "view" is there is a 'w', and "edit" if | |
68 | * there is a 'd' in our name. For edit we just diddle options; | |
69 | * for vi we actually force an early visual command. | |
fe4130ee MH |
70 | */ |
71 | main(ac, av) | |
72 | register int ac; | |
73 | register char *av[]; | |
74 | { | |
44232d5b | 75 | #ifndef VMUNIX |
fe4130ee | 76 | char *erpath = EXSTRINGS; |
44232d5b | 77 | #endif |
fe4130ee MH |
78 | register char *cp; |
79 | register int c; | |
80 | bool recov = 0; | |
81 | bool ivis; | |
82 | bool itag = 0; | |
83 | bool fast = 0; | |
16fb7022 | 84 | extern int onemt(); |
fe4130ee MH |
85 | #ifdef TRACE |
86 | register char *tracef; | |
87 | #endif | |
88 | ||
89 | /* | |
90 | * Immediately grab the tty modes so that we wont | |
91 | * get messed up if an interrupt comes in quickly. | |
92 | */ | |
93 | gTTY(1); | |
d266c416 | 94 | #ifndef USG3TTY |
fe4130ee | 95 | normf = tty.sg_flags; |
d266c416 MH |
96 | #else |
97 | normf = tty; | |
98 | #endif | |
fe4130ee MH |
99 | ppid = getpid(); |
100 | /* | |
d266c416 | 101 | * Defend against d's, v's, w's, and a's in directories of |
fe4130ee MH |
102 | * path leading to our true name. |
103 | */ | |
104 | av[0] = tailpath(av[0]); | |
fe4130ee MH |
105 | |
106 | /* | |
d266c416 | 107 | * Figure out how we were invoked: ex, edit, vi, view. |
fe4130ee | 108 | */ |
d266c416 MH |
109 | ivis = any('v', av[0]); /* "vi" */ |
110 | if (any('w', av[0])) /* "view" */ | |
111 | value(READONLY) = 1; | |
112 | if (any('d', av[0])) { /* "edit" */ | |
fe4130ee MH |
113 | value(OPEN) = 0; |
114 | value(REPORT) = 1; | |
115 | value(MAGIC) = 0; | |
116 | } | |
117 | ||
d266c416 MH |
118 | #ifndef VMUNIX |
119 | /* | |
120 | * For debugging take files out of . if name is a.out. | |
121 | */ | |
122 | if (av[0][0] == 'a') | |
123 | erpath = tailpath(erpath); | |
124 | #endif | |
fe4130ee MH |
125 | /* |
126 | * Open the error message file. | |
127 | */ | |
128 | draino(); | |
44232d5b | 129 | #ifndef VMUNIX |
fe4130ee MH |
130 | erfile = open(erpath+4, 0); |
131 | if (erfile < 0) { | |
132 | erfile = open(erpath, 0); | |
133 | } | |
44232d5b | 134 | #endif |
fe4130ee MH |
135 | pstop(); |
136 | ||
137 | /* | |
138 | * Initialize interrupt handling. | |
139 | */ | |
140 | oldhup = signal(SIGHUP, SIG_IGN); | |
141 | if (oldhup == SIG_DFL) | |
142 | signal(SIGHUP, onhup); | |
143 | oldquit = signal(SIGQUIT, SIG_IGN); | |
144 | ruptible = signal(SIGINT, SIG_IGN) == SIG_DFL; | |
145 | if (signal(SIGTERM, SIG_IGN) == SIG_DFL) | |
146 | signal(SIGTERM, onhup); | |
12fef7d9 MH |
147 | if (signal(SIGEMT, SIG_IGN) == SIG_DFL) |
148 | signal(SIGEMT, onemt); | |
fe4130ee MH |
149 | |
150 | /* | |
151 | * Initialize end of core pointers. | |
152 | * Normally we avoid breaking back to fendcore after each | |
153 | * file since this can be expensive (much core-core copying). | |
154 | * If your system can scatter load processes you could do | |
155 | * this as ed does, saving a little core, but it will probably | |
156 | * not often make much difference. | |
157 | */ | |
158 | fendcore = (line *) sbrk(0); | |
159 | endcore = fendcore - 2; | |
160 | ||
161 | /* | |
162 | * Process flag arguments. | |
163 | */ | |
164 | ac--, av++; | |
165 | while (ac && av[0][0] == '-') { | |
166 | c = av[0][1]; | |
167 | if (c == 0) { | |
168 | hush = 1; | |
169 | value(AUTOPRINT) = 0; | |
170 | fast++; | |
171 | } else switch (c) { | |
172 | ||
d266c416 MH |
173 | case 'R': |
174 | value(READONLY) = 1; | |
175 | break; | |
176 | ||
fe4130ee MH |
177 | #ifdef TRACE |
178 | case 'T': | |
179 | if (av[0][2] == 0) | |
180 | tracef = "trace"; | |
181 | else { | |
182 | tracef = tttrace; | |
183 | tracef[8] = av[0][2]; | |
184 | if (tracef[8]) | |
185 | tracef[9] = av[0][3]; | |
186 | else | |
187 | tracef[9] = 0; | |
188 | } | |
189 | trace = fopen(tracef, "w"); | |
299f2784 | 190 | #define tracbuf NULL |
fe4130ee MH |
191 | if (trace == NULL) |
192 | printf("Trace create error\n"); | |
299f2784 MH |
193 | else |
194 | setbuf(trace, tracbuf); | |
fe4130ee MH |
195 | break; |
196 | ||
197 | #endif | |
198 | ||
199 | #ifdef LISPCODE | |
200 | case 'l': | |
201 | value(LISP) = 1; | |
202 | value(SHOWMATCH) = 1; | |
203 | break; | |
204 | #endif | |
205 | ||
206 | case 'r': | |
207 | recov++; | |
208 | break; | |
209 | ||
210 | case 't': | |
211 | if (ac > 1 && av[1][0] != '-') { | |
212 | ac--, av++; | |
213 | itag = 1; | |
214 | /* BUG: should check for too long tag. */ | |
215 | CP(lasttag, av[0]); | |
216 | } | |
217 | break; | |
218 | ||
219 | case 'v': | |
220 | ivis = 1; | |
221 | break; | |
222 | ||
223 | case 'w': | |
224 | defwind = 0; | |
225 | if (av[0][2] == 0) defwind = 3; | |
226 | else for (cp = &av[0][2]; isdigit(*cp); cp++) | |
227 | defwind = 10*defwind + *cp - '0'; | |
228 | break; | |
229 | ||
1807bf33 | 230 | #ifdef CRYPT |
d266c416 MH |
231 | case 'x': |
232 | /* -x: encrypted mode */ | |
233 | xflag = 1; | |
234 | break; | |
1807bf33 | 235 | #endif |
d266c416 | 236 | |
fe4130ee MH |
237 | default: |
238 | smerror("Unknown option %s\n", av[0]); | |
239 | break; | |
240 | } | |
241 | ac--, av++; | |
242 | } | |
04379bab MH |
243 | |
244 | #ifdef SIGTSTP | |
245 | if (!hush && signal(SIGTSTP, SIG_IGN) == SIG_DFL) | |
246 | signal(SIGTSTP, onsusp), dosusp++; | |
247 | #endif | |
248 | ||
fe4130ee MH |
249 | if (ac && av[0][0] == '+') { |
250 | firstpat = &av[0][1]; | |
251 | ac--, av++; | |
252 | } | |
253 | ||
1807bf33 | 254 | #ifdef CRYPT |
d266c416 MH |
255 | if(xflag){ |
256 | key = getpass(KEYPROMPT); | |
257 | kflag = crinit(key, perm); | |
258 | } | |
1807bf33 | 259 | #endif |
d266c416 | 260 | |
fe4130ee MH |
261 | /* |
262 | * If we are doing a recover and no filename | |
263 | * was given, then execute an exrecover command with | |
264 | * the -r option to type out the list of saved file names. | |
265 | * Otherwise set the remembered file name to the first argument | |
266 | * file name so the "recover" initial command will find it. | |
267 | */ | |
268 | if (recov) { | |
269 | if (ac == 0) { | |
270 | ppid = 0; | |
271 | setrupt(); | |
272 | execl(EXRECOVER, "exrecover", "-r", 0); | |
273 | filioerr(EXRECOVER); | |
274 | exit(1); | |
275 | } | |
276 | CP(savedfile, *av++), ac--; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Initialize the argument list. | |
281 | */ | |
282 | argv0 = av; | |
283 | argc0 = ac; | |
284 | args0 = av[0]; | |
285 | erewind(); | |
286 | ||
287 | /* | |
288 | * Initialize a temporary file (buffer) and | |
289 | * set up terminal environment. Read user startup commands. | |
290 | */ | |
fe4130ee MH |
291 | if (setexit() == 0) { |
292 | setrupt(); | |
293 | intty = isatty(0); | |
294 | value(PROMPT) = intty; | |
d266c416 MH |
295 | if (cp = getenv("SHELL")) |
296 | CP(shell, cp); | |
fe4130ee MH |
297 | if (fast || !intty) |
298 | setterm("dumb"); | |
299 | else { | |
300 | gettmode(); | |
d266c416 | 301 | if ((cp = getenv("TERM")) != 0 && *cp) |
fe4130ee MH |
302 | setterm(cp); |
303 | } | |
304 | } | |
299f2784 | 305 | if (setexit() == 0 && !fast && intty) { |
d266c416 | 306 | if ((globp = getenv("EXINIT")) && *globp) |
fe4130ee | 307 | commands(1,1); |
d266c416 MH |
308 | else { |
309 | globp = 0; | |
310 | if ((cp = getenv("HOME")) != 0 && *cp) | |
311 | source(strcat(strcpy(genbuf, cp), "/.exrc"), 1); | |
312 | } | |
299f2784 MH |
313 | /* |
314 | * Allow local .exrc too. This loses if . is $HOME, | |
315 | * but nobody should notice unless they do stupid things | |
316 | * like putting a version command in .exrc. Besides, | |
317 | * they should be using EXINIT, not .exrc, right? | |
318 | */ | |
319 | source(".exrc", 1); | |
320 | } | |
04379bab | 321 | init(); /* moved after prev 2 chunks to fix directory option */ |
fe4130ee MH |
322 | |
323 | /* | |
324 | * Initial processing. Handle tag, recover, and file argument | |
325 | * implied next commands. If going in as 'vi', then don't do | |
326 | * anything, just set initev so we will do it later (from within | |
327 | * visual). | |
328 | */ | |
329 | if (setexit() == 0) { | |
330 | if (recov) | |
331 | globp = "recover"; | |
332 | else if (itag) | |
333 | globp = ivis ? "tag" : "tag|p"; | |
334 | else if (argc) | |
335 | globp = "next"; | |
336 | if (ivis) | |
337 | initev = globp; | |
338 | else if (globp) { | |
339 | inglobal = 1; | |
340 | commands(1, 1); | |
341 | inglobal = 0; | |
342 | } | |
343 | } | |
344 | ||
345 | /* | |
346 | * Vi command... go into visual. | |
347 | * Strange... everything in vi usually happens | |
348 | * before we ever "start". | |
349 | */ | |
350 | if (ivis) { | |
351 | /* | |
352 | * Don't have to be upward compatible with stupidity | |
353 | * of starting editing at line $. | |
354 | */ | |
355 | if (dol > zero) | |
356 | dot = one; | |
357 | globp = "visual"; | |
358 | if (setexit() == 0) | |
359 | commands(1, 1); | |
360 | } | |
361 | ||
362 | /* | |
363 | * Clear out trash in state accumulated by startup, | |
364 | * and then do the main command loop for a normal edit. | |
365 | * If you quit out of a 'vi' command by doing Q or ^\, | |
366 | * you also fall through to here. | |
367 | */ | |
04379bab | 368 | seenprompt = 1; |
fe4130ee MH |
369 | ungetchar(0); |
370 | globp = 0; | |
371 | initev = 0; | |
372 | setlastchar('\n'); | |
373 | setexit(); | |
374 | commands(0, 0); | |
375 | cleanup(1); | |
376 | exit(0); | |
377 | } | |
378 | ||
379 | /* | |
380 | * Initialization, before editing a new file. | |
381 | * Main thing here is to get a new buffer (in fileinit), | |
382 | * rest is peripheral state resetting. | |
383 | */ | |
384 | init() | |
385 | { | |
386 | register int i; | |
387 | ||
388 | fileinit(); | |
389 | dot = zero = truedol = unddol = dol = fendcore; | |
390 | one = zero+1; | |
391 | undkind = UNDNONE; | |
392 | chng = 0; | |
393 | edited = 0; | |
394 | for (i = 0; i <= 'z'-'a'+1; i++) | |
395 | names[i] = 1; | |
396 | anymarks = 0; | |
1807bf33 | 397 | #ifdef CRYPT |
d266c416 MH |
398 | if(xflag) { |
399 | xtflag = 1; | |
400 | makekey(key, tperm); | |
401 | } | |
1807bf33 | 402 | #endif |
fe4130ee MH |
403 | } |
404 | ||
fe4130ee MH |
405 | /* |
406 | * Return last component of unix path name p. | |
407 | */ | |
408 | char * | |
409 | tailpath(p) | |
410 | register char *p; | |
411 | { | |
412 | register char *r; | |
413 | ||
414 | for (r=p; *p; p++) | |
415 | if (*p == '/') | |
416 | r = p+1; | |
417 | return(r); | |
418 | } |