1 /* $OpenBSD: file.c,v 1.81 2012/06/18 09:19:21 lum Exp $ */
3 /* This file is in the public domain. */
15 size_t xdirname(char *, const char *, size_t);
18 * Insert a file into the current buffer. Real easy - just call the
19 * insertfile routine with the file name.
23 fileinsert(int f, int n)
25 char fname[NFILEN], *bufp, *adjf;
27 if (getbufcwd(fname, sizeof(fname)) != TRUE)
29 bufp = eread("Insert file: ", fname, NFILEN,
30 EFNEW | EFCR | EFFILE | EFDEF);
33 else if (bufp[0] == '\0')
35 adjf = adjustname(bufp, TRUE);
38 return (insertfile(adjf, NULL, FALSE));
42 * Select a file for editing. Look around to see if you can find the file
43 * in another buffer; if you can find it, just switch to the buffer. If
44 * you cannot find the file, create a new buffer, read in the text, and
45 * switch to the new buffer.
49 filevisit(int f, int n)
52 char fname[NFILEN], *bufp, *adjf;
55 if (getbufcwd(fname, sizeof(fname)) != TRUE)
57 bufp = eread("Find file: ", fname, NFILEN,
58 EFNEW | EFCR | EFFILE | EFDEF);
61 else if (bufp[0] == '\0')
63 adjf = adjustname(fname, TRUE);
66 if ((bp = findbuffer(adjf)) == NULL)
69 if (showbuffer(bp, curwp, WFFULL) != TRUE)
71 if (bp->b_fname[0] == '\0') {
72 if ((status = readin(adjf)) != TRUE)
80 * Replace the current file with an alternate one. Semantics for finding
81 * the replacement file are the same as 'filevisit', except the current
82 * buffer is killed before the switch. If the kill fails, or is aborted,
83 * revert to the original file.
87 filevisitalt(int f, int n)
90 char fname[NFILEN], *bufp, *adjf;
93 if (getbufcwd(fname, sizeof(fname)) != TRUE)
95 bufp = eread("Find alternate file: ", fname, NFILEN,
96 EFNEW | EFCR | EFFILE | EFDEF);
99 else if (bufp[0] == '\0')
102 status = killbuffer(curbp);
103 if (status == ABORT || status == FALSE)
106 adjf = adjustname(fname, TRUE);
109 if ((bp = findbuffer(adjf)) == NULL)
112 if (showbuffer(bp, curwp, WFFULL) != TRUE)
114 if (bp->b_fname[0] == '\0') {
115 if ((status = readin(adjf)) != TRUE)
123 filevisitro(int f, int n)
127 error = filevisit(f, n);
130 curbp->b_flag |= BFREADONLY;
135 * Pop to a file in the other window. Same as the last function, but uses
136 * popbuf instead of showbuffer.
140 poptofile(int f, int n)
144 char fname[NFILEN], *adjf, *bufp;
147 if (getbufcwd(fname, sizeof(fname)) != TRUE)
149 if ((bufp = eread("Find file in other window: ", fname, NFILEN,
150 EFNEW | EFCR | EFFILE | EFDEF)) == NULL)
152 else if (bufp[0] == '\0')
154 adjf = adjustname(fname, TRUE);
157 if ((bp = findbuffer(adjf)) == NULL)
160 return (splitwind(f, n));
161 if ((wp = popbuf(bp, WNONE)) == NULL)
165 if (bp->b_fname[0] == '\0') {
166 if ((status = readin(adjf)) != TRUE)
174 * Given a file name, either find the buffer it uses, or create a new
175 * empty buffer to put it in.
181 char bname[NBUFN], fname[NBUFN];
183 if (strlcpy(fname, fn, sizeof(fname)) >= sizeof(fname)) {
184 ewprintf("filename too long");
188 for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
189 if (strcmp(bp->b_fname, fname) == 0)
192 /* Not found. Create a new one, adjusting name first */
193 if (augbname(bname, fname, sizeof(bname)) == FALSE)
196 bp = bfind(bname, TRUE);
201 * Read the file "fname" into the current buffer. Make all of the text
202 * in the buffer go away, after checking for unsaved changes. This is
203 * called by the "read" command, the "visit" command, and the mainline
210 int status, i, ro = FALSE;
214 if (bclear(curbp) != TRUE)
216 /* Clear readonly. May be set by autoexec path */
217 curbp->b_flag &= ~BFREADONLY;
218 if ((status = insertfile(fname, fname, TRUE)) != TRUE) {
219 ewprintf("File is not readable: %s", fname);
223 for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
224 if (wp->w_bufp == curbp) {
225 wp->w_dotp = wp->w_linep = bfirstlp(curbp);
233 * Call auto-executing function if we need to.
235 if ((ael = find_autoexec(fname)) != NULL) {
236 for (i = 0; ael[i] != NULL; i++)
242 curbp->b_flag &= ~BFCHG;
245 * We need to set the READONLY flag after we insert the file,
246 * unless the file is a directory.
248 if (access(fname, W_OK) && errno != ENOENT)
250 if (fisdir(fname) == TRUE)
253 curbp->b_flag |= BFREADONLY;
256 gotoline(FFARG, startrow);
265 * NB, getting file attributes is done here under control of a flag
266 * rather than in readin, which would be cleaner. I was concerned
267 * that some operating system might require the file to be open
268 * in order to get the information. Similarly for writing.
272 * Insert a file in the current buffer, after dot. If file is a directory,
273 * and 'replacebuf' is TRUE, invoke dired mode, else die with an error.
274 * If file is a regular file, set mark at the end of the text inserted;
275 * point at the beginning. Return a standard status. Print a summary
276 * (lines read, error message) out as well. This routine also does the
277 * read end of backup processing. The BFBAK flag, if set in a buffer,
278 * says that a backup should be taken. It is set when a file is read in,
279 * but not on a new file. You don't need to make a backup copy of nothing.
282 static char *line = NULL;
283 static int linesize = 0;
286 insertfile(char *fname, char *newname, int replacebuf)
289 struct line *lp1, *lp2;
290 struct line *olp; /* line we started at */
292 int nbytes, s, nline = 0, siz, x, x2;
293 int opos; /* offset we started at */
294 int oline; /* original line number */
297 if (replacebuf == TRUE)
298 x = undo_enable(FFRAND, 0);
304 line = malloc(NLINE);
306 panic("out of memory");
312 if (newname != NULL) {
313 (void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
314 (void)xdirname(bp->b_cwd, newname, sizeof(bp->b_cwd));
315 (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
319 if ((s = ffropen(&ffp, fname, (replacebuf == TRUE) ? bp : NULL))
325 ewprintf("(New file)");
327 ewprintf("(File not found)");
329 } else if (s == FIODIR) {
330 /* file was a directory */
331 if (replacebuf == FALSE) {
332 ewprintf("Cannot insert: file is a directory, %s",
338 undo_enable(FFRAND, x);
342 return (showbuffer(bp, curwp, WFFULL | WFMODE));
344 (void)xdirname(bp->b_cwd, fname, sizeof(bp->b_cwd));
345 (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
347 opos = curwp->w_doto;
348 oline = curwp->w_dotline;
350 * Open a new line at dot and start inserting after it.
351 * We will delete this newline after insertion.
352 * Disable undo, as we create the undo record manually.
354 x2 = undo_enable(FFRAND, 0);
356 olp = lback(curwp->w_dotp);
357 undo_enable(FFRAND, x2);
361 while ((s = ffgetline(ffp, line, linesize, &nbytes)) != FIOERR) {
369 if ((lp1 = lalloc(nbytes)) == NULL) {
370 /* keep message on the display */
372 undo_add_insert(olp, opos,
373 siz - nbytes - 1 - 1);
376 bcopy(line, <ext(lp1)[0], nbytes);
377 lp2 = lback(curwp->w_dotp);
379 lp1->l_fp = curwp->w_dotp;
381 curwp->w_dotp->l_bp = lp1;
383 undo_add_insert(olp, opos, siz - 1);
388 /* a line too long to fit in our buffer */
392 newsize = linesize * 2;
394 (cp = malloc(newsize)) == NULL) {
395 ewprintf("Could not allocate %d bytes",
400 bcopy(line, cp, linesize);
403 s = ffgetline(ffp, line + linesize, linesize,
412 ewprintf("Unknown code %d reading file", s);
419 (void)ffclose(ffp, NULL);
420 /* don't zap an error */
423 ewprintf("(Read 1 line)");
425 ewprintf("(Read %d lines)", nline);
427 /* set mark at the end of the text */
428 curwp->w_dotp = curwp->w_markp = lback(curwp->w_dotp);
429 curwp->w_marko = llength(curwp->w_markp);
430 curwp->w_markline = oline + nline + 1;
432 * if we are at the end of the file, ldelnewline is a no-op,
433 * but we still need to decrement the line and markline counts
434 * as we've accounted for this fencepost in our arithmetic
436 if (lforw(curwp->w_dotp) == curwp->w_bufp->b_headp) {
437 curwp->w_bufp->b_lines--;
442 curwp->w_doto = opos;
443 curwp->w_dotline = oline;
444 if (olp == curbp->b_headp)
445 curwp->w_dotp = lforw(olp);
447 bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
451 * If the insert was at the end of buffer, set lp1 to the end of
452 * buffer line, and lp2 to the beginning of the newly inserted text.
453 * (Otherwise lp2 is set to NULL.) This is used below to set
454 * pointers in other windows correctly if they are also at the end of
458 if (curwp->w_markp == lp1) {
461 /* delete extraneous newline */
465 for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
466 if (wp->w_bufp == curbp) {
467 wp->w_rflag |= WFMODE | WFEDIT;
468 if (wp != curwp && lp2 != NULL) {
469 if (wp->w_dotp == lp1)
471 if (wp->w_markp == lp1)
473 if (wp->w_linep == lp1)
478 bp->b_lines += nline;
480 undo_enable(FFRAND, x);
482 /* return FALSE if error */
483 return (s != FIOERR);
487 * Ask for a file name and write the contents of the current buffer to that
488 * file. Update the remembered file name and clear the buffer changed flag.
489 * This handling of file names is different from the earlier versions and
490 * is more compatible with Gosling EMACS than with ITS EMACS.
494 filewrite(int f, int n)
498 char fname[NFILEN], bn[NBUFN], tmp[NFILEN + 25];
499 char *adjfname, *bufp;
502 if (getbufcwd(fname, sizeof(fname)) != TRUE)
504 if ((bufp = eread("Write file: ", fname, NFILEN,
505 EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
507 else if (bufp[0] == '\0')
510 adjfname = adjustname(fname, TRUE);
511 if (adjfname == NULL)
514 /* Check if file exists; write checks done later */
515 if (stat(adjfname, &statbuf) == 0) {
516 snprintf(tmp, sizeof(tmp), "File `%s' exists; overwrite",
518 if ((s = eyorn(tmp)) != TRUE)
522 /* old attributes are no longer current */
523 bzero(&curbp->b_fi, sizeof(curbp->b_fi));
524 if ((s = writeout(&ffp, curbp, adjfname)) == TRUE) {
525 (void)strlcpy(curbp->b_fname, adjfname, sizeof(curbp->b_fname));
526 if (getbufcwd(curbp->b_cwd, sizeof(curbp->b_cwd)) != TRUE)
527 (void)strlcpy(curbp->b_cwd, "/", sizeof(curbp->b_cwd));
528 if (augbname(bn, curbp->b_fname, sizeof(bn))
531 free(curbp->b_bname);
532 if ((curbp->b_bname = strdup(bn)) == NULL)
534 (void)fupdstat(curbp);
535 curbp->b_flag &= ~(BFBAK | BFCHG);
542 * Save the contents of the current buffer back into its associated file.
545 #define MAKEBACKUP TRUE
546 #endif /* !MAKEBACKUP */
547 static int makebackup = MAKEBACKUP;
551 filesave(int f, int n)
553 if (curbp->b_fname[0] == '\0')
554 return (filewrite(f, n));
556 return (buffsave(curbp));
560 * Save the contents of the buffer argument into its associated file. Do
561 * nothing if there have been no changes (is this a bug, or a feature?).
562 * Error if there is no remembered file name. If this is the first write
563 * since the read or visit, then a backup copy of the file is made.
564 * Allow user to select whether or not to make backup files by looking at
565 * the value of makebackup.
568 buffsave(struct buffer *bp)
573 /* return, no changes */
574 if ((bp->b_flag & BFCHG) == 0) {
575 ewprintf("(No changes need to be saved)");
579 /* must have a name */
580 if (bp->b_fname[0] == '\0') {
581 ewprintf("No file name");
585 /* Ensure file has not been modified elsewhere */
586 /* We don't use the ignore flag here */
587 if (fchecktime(bp) != TRUE) {
588 if ((s = eyesno("File has changed on disk since last save. "
589 "Save anyway")) != TRUE)
593 if (makebackup && (bp->b_flag & BFBAK)) {
594 s = fbackupfile(bp->b_fname);
600 (s = eyesno("Backup error, save anyway")) != TRUE)
603 if ((s = writeout(&ffp, bp, bp->b_fname)) == TRUE) {
605 bp->b_flag &= ~(BFCHG | BFBAK);
612 * Since we don't have variables (we probably should) this is a command
613 * processor for changing the value of the make backup flag. If no argument
614 * is given, sets makebackup to true, so backups are made. If an argument is
615 * given, no backup files are made when saving a new version of a file.
619 makebkfile(int f, int n)
624 makebackup = !makebackup;
625 ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
630 * NB: bp is passed to both ffwopen and ffclose because some
631 * attribute information may need to be updated at open time
632 * and others after the close. This is OS-dependent. Note
633 * that the ff routines are assumed to be able to tell whether
634 * the attribute information has been set up in this buffer
639 * This function performs the details of file writing; writing the file
640 * in buffer bp to file fn. Uses the file management routines in the
641 * "fileio.c" package. Most of the grief is checking of some sort.
642 * You may want to call fupdstat() after using this function.
645 writeout(FILE ** ffp, struct buffer *bp, char *fn)
649 /* open writes message */
650 if ((s = ffwopen(ffp, fn, bp)) != FIOSUC)
652 s = ffputbuf(*ffp, bp);
655 s = ffclose(*ffp, bp);
657 ewprintf("Wrote %s", fn);
659 /* print a message indicating write error */
660 (void)ffclose(*ffp, bp);
661 ewprintf("Unable to write %s", fn);
663 return (s == FIOSUC);
667 * Tag all windows for bp (all windows if bp == NULL) as needing their
671 upmodes(struct buffer *bp)
675 for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
676 if (bp == NULL || curwp->w_bufp == bp)
677 wp->w_rflag |= WFMODE;
681 * dirname using strlcpy semantic.
682 * Like dirname() except an empty string is returned in
683 * place of "/". This means we can always add a trailing
684 * slash and be correct.
685 * Address portability issues by copying argument
686 * before using. Some implementations modify the input string.
689 xdirname(char *dp, const char *path, size_t dplen)
694 (void)strlcpy(ts, path, NFILEN);
695 len = strlcpy(dp, dirname(ts), dplen);
696 if (dplen > 0 && dp[0] == '/' && dp[1] == '\0') {
704 * basename using strlcpy/strlcat semantic.
705 * Address portability issue by copying argument
706 * before using: some implementations modify the input string.
709 xbasename(char *bp, const char *path, size_t bplen)
713 (void)strlcpy(ts, path, NFILEN);
714 return (strlcpy(bp, basename(ts), bplen));