1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
|
/* $OpenBSD: file.c,v 1.69 2008/09/15 16:13:35 kjell Exp $ */
/* This file is in the public domain. */
/*
* File commands.
*/
#include <libgen.h>
#include "def.h"
static char *xdirname(const char *);
/*
* Insert a file into the current buffer. Real easy - just call the
* insertfile routine with the file name.
*/
/* ARGSUSED */
int
fileinsert(int f, int n)
{
char fname[NFILEN], *bufp, *adjf;
if (getbufcwd(fname, sizeof(fname)) != TRUE)
fname[0] = '\0';
bufp = eread("Insert file: ", fname, NFILEN,
EFNEW | EFCR | EFFILE | EFDEF);
if (bufp == NULL)
return (ABORT);
else if (bufp[0] == '\0')
return (FALSE);
adjf = adjustname(bufp, TRUE);
if (adjf == NULL)
return (FALSE);
return (insertfile(adjf, NULL, FALSE));
}
/*
* Select a file for editing. Look around to see if you can find the file
* in another buffer; if you can find it, just switch to the buffer. If
* you cannot find the file, create a new buffer, read in the text, and
* switch to the new buffer.
*/
/* ARGSUSED */
int
filevisit(int f, int n)
{
struct buffer *bp;
char fname[NFILEN], *bufp, *adjf;
int status;
if (getbufcwd(fname, sizeof(fname)) != TRUE)
fname[0] = '\0';
bufp = eread("Find file: ", fname, NFILEN,
EFNEW | EFCR | EFFILE | EFDEF);
if (bufp == NULL)
return (ABORT);
else if (bufp[0] == '\0')
return (FALSE);
adjf = adjustname(fname, TRUE);
if (adjf == NULL)
return (FALSE);
if ((bp = findbuffer(adjf)) == NULL)
return (FALSE);
curbp = bp;
if (showbuffer(bp, curwp, WFFULL) != TRUE)
return (FALSE);
if (bp->b_fname[0] == '\0') {
if ((status = readin(adjf)) != TRUE)
killbuffer(bp);
return (status);
}
return (TRUE);
}
/*
* Replace the current file with an alternate one. Semantics for finding
* the replacement file are the same as 'filevisit', except the current
* buffer is killed before the switch. If the kill fails, or is aborted,
* revert to the original file.
*/
/* ARGSUSED */
int
filevisitalt(int f, int n)
{
struct buffer *bp;
char fname[NFILEN], *bufp, *adjf;
int status;
if (getbufcwd(fname, sizeof(fname)) != TRUE)
fname[0] = '\0';
bufp = eread("Find alternate file: ", fname, NFILEN,
EFNEW | EFCR | EFFILE | EFDEF);
if (bufp == NULL)
return (ABORT);
else if (bufp[0] == '\0')
return (FALSE);
status = killbuffer(curbp);
if (status == ABORT || status == FALSE)
return (ABORT);
adjf = adjustname(fname, TRUE);
if (adjf == NULL)
return (FALSE);
if ((bp = findbuffer(adjf)) == NULL)
return (FALSE);
curbp = bp;
if (showbuffer(bp, curwp, WFFULL) != TRUE)
return (FALSE);
if (bp->b_fname[0] == '\0') {
if ((status = readin(adjf)) != TRUE)
killbuffer(bp);
return (status);
}
return (TRUE);
}
int
filevisitro(int f, int n)
{
int error;
error = filevisit(f, n);
if (error != TRUE)
return (error);
curbp->b_flag |= BFREADONLY;
return (TRUE);
}
/*
* Pop to a file in the other window. Same as the last function, but uses
* popbuf instead of showbuffer.
*/
/* ARGSUSED */
int
poptofile(int f, int n)
{
struct buffer *bp;
struct mgwin *wp;
char fname[NFILEN], *adjf, *bufp;
int status;
if (getbufcwd(fname, sizeof(fname)) != TRUE)
fname[0] = '\0';
if ((bufp = eread("Find file in other window: ", fname, NFILEN,
EFNEW | EFCR | EFFILE | EFDEF)) == NULL)
return (ABORT);
else if (bufp[0] == '\0')
return (FALSE);
adjf = adjustname(fname, TRUE);
if (adjf == NULL)
return (FALSE);
if ((bp = findbuffer(adjf)) == NULL)
return (FALSE);
if (bp == curbp)
return (splitwind(f, n));
if ((wp = popbuf(bp)) == NULL)
return (FALSE);
curbp = bp;
curwp = wp;
if (bp->b_fname[0] == '\0') {
if ((status = readin(adjf)) != TRUE)
killbuffer(bp);
return (status);
}
return (TRUE);
}
/*
* Given a file name, either find the buffer it uses, or create a new
* empty buffer to put it in.
*/
struct buffer *
findbuffer(char *fn)
{
struct buffer *bp;
char bname[NBUFN], fname[NBUFN];
if (strlcpy(fname, fn, sizeof(fname)) >= sizeof(fname)) {
ewprintf("filename too long");
return (NULL);
}
for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
if (strcmp(bp->b_fname, fname) == 0)
return (bp);
}
/* Not found. Create a new one, adjusting name first */
if (augbname(bname, fname, sizeof(bname)) == FALSE)
return (NULL);
bp = bfind(bname, TRUE);
return (bp);
}
/*
* Read the file "fname" into the current buffer. Make all of the text
* in the buffer go away, after checking for unsaved changes. This is
* called by the "read" command, the "visit" command, and the mainline
* (for "mg file").
*/
int
readin(char *fname)
{
struct mgwin *wp;
int status, i, ro = FALSE;
PF *ael;
/* might be old */
if (bclear(curbp) != TRUE)
return (TRUE);
/* Clear readonly. May be set by autoexec path */
curbp->b_flag &= ~BFREADONLY;
if ((status = insertfile(fname, fname, TRUE)) != TRUE) {
ewprintf("File is not readable: %s", fname);
return (FALSE);
}
for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
if (wp->w_bufp == curbp) {
wp->w_dotp = wp->w_linep = bfirstlp(curbp);
wp->w_doto = 0;
wp->w_markp = NULL;
wp->w_marko = 0;
}
}
/*
* Call auto-executing function if we need to.
*/
if ((ael = find_autoexec(fname)) != NULL) {
for (i = 0; ael[i] != NULL; i++)
(*ael[i])(0, 1);
free(ael);
}
/* no change */
curbp->b_flag &= ~BFCHG;
/*
* We need to set the READONLY flag after we insert the file,
* unless the file is a directory.
*/
if (access(fname, W_OK) && errno != ENOENT)
ro = TRUE;
if (fisdir(fname) == TRUE)
ro = TRUE;
if (ro == TRUE)
curbp->b_flag |= BFREADONLY;
if (startrow) {
gotoline(FFARG, startrow);
startrow = 0;
}
undo_add_modified();
return (status);
}
/*
* NB, getting file attributes is done here under control of a flag
* rather than in readin, which would be cleaner. I was concerned
* that some operating system might require the file to be open
* in order to get the information. Similarly for writing.
*/
/*
* Insert a file in the current buffer, after dot. If file is a directory,
* and 'replacebuf' is TRUE, invoke dired mode, else die with an error.
* If file is a regular file, set mark at the end of the text inserted;
* point at the beginning. Return a standard status. Print a summary
* (lines read, error message) out as well. This routine also does the
* read end of backup processing. The BFBAK flag, if set in a buffer,
* says that a backup should be taken. It is set when a file is read in,
* but not on a new file. You don't need to make a backup copy of nothing.
*/
static char *line = NULL;
static int linesize = 0;
int
insertfile(char *fname, char *newname, int replacebuf)
{
struct buffer *bp;
struct line *lp1, *lp2;
struct line *olp; /* line we started at */
struct mgwin *wp;
int nbytes, s, nline = 0, siz, x, x2;
int opos; /* offset we started at */
int oline; /* original line number */
char *dp;
if (replacebuf == TRUE)
x = undo_enable(FFRAND, 0);
else
x = undo_enabled();
lp1 = NULL;
if (line == NULL) {
line = malloc(NLINE);
if (line == NULL)
panic("out of memory");
linesize = NLINE;
}
/* cheap */
bp = curbp;
if (newname != NULL) {
(void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
dp = xdirname(newname);
(void)strlcpy(bp->b_cwd, dp, sizeof(bp->b_cwd));
(void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
free(dp);
}
/* hard file open */
if ((s = ffropen(fname, (replacebuf == TRUE) ? bp : NULL)) == FIOERR)
goto out;
if (s == FIOFNF) {
/* file not found */
if (newname != NULL)
ewprintf("(New file)");
else
ewprintf("(File not found)");
goto out;
} else if (s == FIODIR) {
/* file was a directory */
if (replacebuf == FALSE) {
ewprintf("Cannot insert: file is a directory, %s",
fname);
goto cleanup;
}
killbuffer(bp);
if ((bp = dired_(fname)) == NULL)
return (FALSE);
undo_enable(FFRAND, x);
curbp = bp;
return (showbuffer(bp, curwp, WFFULL | WFMODE));
} else {
dp = xdirname(fname);
(void)strlcpy(bp->b_cwd, dp, sizeof(bp->b_cwd));
(void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
free(dp);
}
opos = curwp->w_doto;
oline = curwp->w_dotline;
/*
* Open a new line at dot and start inserting after it.
* We will delete this newline after insertion.
* Disable undo, as we create the undo record manually.
*/
x2 = undo_enable(FFRAND, 0);
(void)lnewline();
olp = lback(curwp->w_dotp);
undo_enable(FFRAND, x2);
nline = 0;
siz = 0;
while ((s = ffgetline(line, linesize, &nbytes)) != FIOERR) {
retry:
siz += nbytes + 1;
switch (s) {
case FIOSUC:
/* FALLTHRU */
case FIOEOF:
++nline;
if ((lp1 = lalloc(nbytes)) == NULL) {
/* keep message on the display */
s = FIOERR;
undo_add_insert(olp, opos,
siz - nbytes - 1 - 1);
goto endoffile;
}
bcopy(line, <ext(lp1)[0], nbytes);
lp2 = lback(curwp->w_dotp);
lp2->l_fp = lp1;
lp1->l_fp = curwp->w_dotp;
lp1->l_bp = lp2;
curwp->w_dotp->l_bp = lp1;
if (s == FIOEOF) {
undo_add_insert(olp, opos, siz - 1);
goto endoffile;
}
break;
case FIOLONG: {
/* a line too long to fit in our buffer */
char *cp;
int newsize;
newsize = linesize * 2;
if (newsize < 0 ||
(cp = malloc(newsize)) == NULL) {
ewprintf("Could not allocate %d bytes",
newsize);
s = FIOERR;
goto endoffile;
}
bcopy(line, cp, linesize);
free(line);
line = cp;
s = ffgetline(line + linesize, linesize,
&nbytes);
nbytes += linesize;
linesize = newsize;
if (s == FIOERR)
goto endoffile;
goto retry;
}
default:
ewprintf("Unknown code %d reading file", s);
s = FIOERR;
break;
}
}
endoffile:
/* ignore errors */
ffclose(NULL);
/* don't zap an error */
if (s == FIOEOF) {
if (nline == 1)
ewprintf("(Read 1 line)");
else
ewprintf("(Read %d lines)", nline);
}
/* set mark at the end of the text */
curwp->w_dotp = curwp->w_markp = lback(curwp->w_dotp);
curwp->w_marko = llength(curwp->w_markp);
curwp->w_markline = oline + nline + 1;
/*
* if we are at the end of the file, ldelnewline is a no-op,
* but we still need to decrement the line and markline counts
* as we've accounted for this fencepost in our arithmetic
*/
if (lforw(curwp->w_dotp) == curwp->w_bufp->b_headp) {
curwp->w_bufp->b_lines--;
curwp->w_markline--;
} else
(void)ldelnewline();
curwp->w_dotp = olp;
curwp->w_doto = opos;
curwp->w_dotline = oline;
if (olp == curbp->b_headp)
curwp->w_dotp = lforw(olp);
if (newname != NULL)
bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
else
bp->b_flag |= BFCHG;
/*
* If the insert was at the end of buffer, set lp1 to the end of
* buffer line, and lp2 to the beginning of the newly inserted text.
* (Otherwise lp2 is set to NULL.) This is used below to set
* pointers in other windows correctly if they are also at the end of
* buffer.
*/
lp1 = bp->b_headp;
if (curwp->w_markp == lp1) {
lp2 = curwp->w_dotp;
} else {
/* delete extraneous newline */
(void)ldelnewline();
out: lp2 = NULL;
}
for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
if (wp->w_bufp == curbp) {
wp->w_flag |= WFMODE | WFEDIT;
if (wp != curwp && lp2 != NULL) {
if (wp->w_dotp == lp1)
wp->w_dotp = lp2;
if (wp->w_markp == lp1)
wp->w_markp = lp2;
if (wp->w_linep == lp1)
wp->w_linep = lp2;
}
}
}
bp->b_lines += nline;
cleanup:
undo_enable(FFRAND, x);
/* return FALSE if error */
return (s != FIOERR);
}
/*
* Ask for a file name and write the contents of the current buffer to that
* file. Update the remembered file name and clear the buffer changed flag.
* This handling of file names is different from the earlier versions and
* is more compatible with Gosling EMACS than with ITS EMACS.
*/
/* ARGSUSED */
int
filewrite(int f, int n)
{
int s;
char fname[NFILEN], bn[NBUFN];
char *adjfname, *bufp;
if (getbufcwd(fname, sizeof(fname)) != TRUE)
fname[0] = '\0';
if ((bufp = eread("Write file: ", fname, NFILEN,
EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
return (ABORT);
else if (bufp[0] == '\0')
return (FALSE);
adjfname = adjustname(fname, TRUE);
if (adjfname == NULL)
return (FALSE);
/* old attributes are no longer current */
bzero(&curbp->b_fi, sizeof(curbp->b_fi));
if ((s = writeout(curbp, adjfname)) == TRUE) {
(void)strlcpy(curbp->b_fname, adjfname, sizeof(curbp->b_fname));
if (getbufcwd(curbp->b_cwd, sizeof(curbp->b_cwd)) != TRUE)
(void)strlcpy(curbp->b_cwd, "/", sizeof(curbp->b_cwd));
if (augbname(bn, basename(curbp->b_fname), sizeof(bn))
== FALSE)
return (FALSE);
free(curbp->b_bname);
if ((curbp->b_bname = strdup(bn)) == NULL)
return (FALSE);
curbp->b_flag &= ~(BFBAK | BFCHG);
upmodes(curbp);
}
return (s);
}
/*
* Save the contents of the current buffer back into its associated file.
*/
#ifndef MAKEBACKUP
#define MAKEBACKUP TRUE
#endif /* !MAKEBACKUP */
static int makebackup = MAKEBACKUP;
/* ARGSUSED */
int
filesave(int f, int n)
{
return (buffsave(curbp));
}
/*
* Save the contents of the buffer argument into its associated file. Do
* nothing if there have been no changes (is this a bug, or a feature?).
* Error if there is no remembered file name. If this is the first write
* since the read or visit, then a backup copy of the file is made.
* Allow user to select whether or not to make backup files by looking at
* the value of makebackup.
*/
int
buffsave(struct buffer *bp)
{
int s;
/* return, no changes */
if ((bp->b_flag & BFCHG) == 0) {
ewprintf("(No changes need to be saved)");
return (TRUE);
}
/* must have a name */
if (bp->b_fname[0] == '\0') {
ewprintf("No file name");
return (FALSE);
}
/* Ensure file has not been modified elsewhere */
/* We don't use the ignore flag here */
if (fchecktime(bp) != TRUE) {
if ((s = eyesno("File has changed on disk since last save. "
"Save anyway")) != TRUE)
return (s);
}
if (makebackup && (bp->b_flag & BFBAK)) {
s = fbackupfile(bp->b_fname);
/* hard error */
if (s == ABORT)
return (FALSE);
/* softer error */
if (s == FALSE &&
(s = eyesno("Backup error, save anyway")) != TRUE)
return (s);
}
if ((s = writeout(bp, bp->b_fname)) == TRUE) {
bp->b_flag &= ~(BFCHG | BFBAK);
upmodes(bp);
}
return (s);
}
/*
* Since we don't have variables (we probably should) this is a command
* processor for changing the value of the make backup flag. If no argument
* is given, sets makebackup to true, so backups are made. If an argument is
* given, no backup files are made when saving a new version of a file.
*/
/* ARGSUSED */
int
makebkfile(int f, int n)
{
if (f & FFARG)
makebackup = n > 0;
else
makebackup = !makebackup;
ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
return (TRUE);
}
/*
* NB: bp is passed to both ffwopen and ffclose because some
* attribute information may need to be updated at open time
* and others after the close. This is OS-dependent. Note
* that the ff routines are assumed to be able to tell whether
* the attribute information has been set up in this buffer
* or not.
*/
/*
* This function performs the details of file writing; writing the file
* in buffer bp to file fn. Uses the file management routines in the
* "fileio.c" package. Most of the grief is checking of some sort.
*/
int
writeout(struct buffer *bp, char *fn)
{
int s;
/* open writes message */
if ((s = ffwopen(fn, bp)) != FIOSUC)
return (FALSE);
s = ffputbuf(bp);
if (s == FIOSUC) {
/* no write error */
s = ffclose(bp);
if (s == FIOSUC)
ewprintf("Wrote %s", fn);
} else
/* ignore close error if it is a write error */
(void)ffclose(bp);
(void)fupdstat(bp);
return (s == FIOSUC);
}
/*
* Tag all windows for bp (all windows if bp == NULL) as needing their
* mode line updated.
*/
void
upmodes(struct buffer *bp)
{
struct mgwin *wp;
for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
if (bp == NULL || curwp->w_bufp == bp)
wp->w_flag |= WFMODE;
}
/*
* Same as dirname, except an empty string is returned in
* place of "/". This means we can always add a trailing
* slash and be correct.
* Unlike dirname, we allocate. Caller must free.
*/
static char *
xdirname(const char *path)
{
char *dp;
dp = dirname(path);
if (*dp && dp[0] == '/' && dp[1] == '\0')
return (strdup(""));
return (strdup(dp));
}
|