Annotation of src/usr.bin/mg/file.c, Revision 1.67
1.67 ! kjell 1: /* $OpenBSD: file.c,v 1.66 2008/06/13 18:45:41 kjell Exp $ */
1.37 kjell 2:
3: /* This file is in the public domain. */
1.5 niklas 4:
1.1 deraadt 5: /*
1.4 millert 6: * File commands.
1.1 deraadt 7: */
8:
1.54 kjell 9: #include <libgen.h>
10:
1.41 kjell 11: #include "def.h"
12:
1.66 kjell 13: static char *xdirname(const char *);
14:
1.1 deraadt 15: /*
1.4 millert 16: * Insert a file into the current buffer. Real easy - just call the
1.1 deraadt 17: * insertfile routine with the file name.
18: */
1.3 millert 19: /* ARGSUSED */
20: int
1.15 vincent 21: fileinsert(int f, int n)
1.1 deraadt 22: {
1.29 vincent 23: char fname[NFILEN], *bufp, *adjf;
1.1 deraadt 24:
1.54 kjell 25: if (getbufcwd(fname, sizeof(fname)) != TRUE)
26: fname[0] = '\0';
27: bufp = eread("Insert file: ", fname, NFILEN,
28: EFNEW | EFCR | EFFILE | EFDEF);
1.29 vincent 29: if (bufp == NULL)
1.32 db 30: return (ABORT);
1.29 vincent 31: else if (bufp[0] == '\0')
1.32 db 32: return (FALSE);
1.58 jason 33: adjf = adjustname(bufp, TRUE);
1.22 vincent 34: if (adjf == NULL)
35: return (FALSE);
1.32 db 36: return (insertfile(adjf, NULL, FALSE));
1.1 deraadt 37: }
38:
39: /*
1.9 mickey 40: * Select a file for editing. Look around to see if you can find the file
1.4 millert 41: * in another buffer; if you can find it, just switch to the buffer. If
1.9 mickey 42: * you cannot find the file, create a new buffer, read in the text, and
1.4 millert 43: * switch to the new buffer.
1.1 deraadt 44: */
1.3 millert 45: /* ARGSUSED */
46: int
1.15 vincent 47: filevisit(int f, int n)
1.1 deraadt 48: {
1.45 deraadt 49: struct buffer *bp;
1.54 kjell 50: char fname[NFILEN], *bufp, *adjf;
1.39 kjell 51: int status;
1.34 cloder 52:
1.54 kjell 53: if (getbufcwd(fname, sizeof(fname)) != TRUE)
1.34 cloder 54: fname[0] = '\0';
1.38 kjell 55: bufp = eread("Find file: ", fname, NFILEN,
56: EFNEW | EFCR | EFFILE | EFDEF);
1.29 vincent 57: if (bufp == NULL)
1.32 db 58: return (ABORT);
1.29 vincent 59: else if (bufp[0] == '\0')
1.32 db 60: return (FALSE);
1.58 jason 61: adjf = adjustname(fname, TRUE);
1.22 vincent 62: if (adjf == NULL)
63: return (FALSE);
1.3 millert 64: if ((bp = findbuffer(adjf)) == NULL)
1.32 db 65: return (FALSE);
1.1 deraadt 66: curbp = bp;
1.55 kjell 67: if (showbuffer(bp, curwp, WFFULL) != TRUE)
1.32 db 68: return (FALSE);
1.39 kjell 69: if (bp->b_fname[0] == '\0') {
1.30 jfb 70: if ((status = readin(adjf)) != TRUE)
71: killbuffer(bp);
1.32 db 72: return (status);
1.30 jfb 73: }
1.32 db 74: return (TRUE);
1.35 jason 75: }
76:
1.36 kjell 77: /*
78: * Replace the current file with an alternate one. Semantics for finding
79: * the replacement file are the same as 'filevisit', except the current
80: * buffer is killed before the switch. If the kill fails, or is aborted,
81: * revert to the original file.
82: */
1.43 kjell 83: /* ARGSUSED */
1.35 jason 84: int
85: filevisitalt(int f, int n)
86: {
1.45 deraadt 87: struct buffer *bp;
1.54 kjell 88: char fname[NFILEN], *bufp, *adjf;
1.36 kjell 89: int status;
90:
1.54 kjell 91: if (getbufcwd(fname, sizeof(fname)) != TRUE)
1.36 kjell 92: fname[0] = '\0';
93: bufp = eread("Find alternate file: ", fname, NFILEN,
94: EFNEW | EFCR | EFFILE | EFDEF);
95: if (bufp == NULL)
1.35 jason 96: return (ABORT);
1.36 kjell 97: else if (bufp[0] == '\0')
98: return (FALSE);
99:
100: status = killbuffer(curbp);
101: if (status == ABORT || status == FALSE)
102: return (ABORT);
103:
1.58 jason 104: adjf = adjustname(fname, TRUE);
1.36 kjell 105: if (adjf == NULL)
106: return (FALSE);
107: if ((bp = findbuffer(adjf)) == NULL)
108: return (FALSE);
109: curbp = bp;
1.55 kjell 110: if (showbuffer(bp, curwp, WFFULL) != TRUE)
1.36 kjell 111: return (FALSE);
112: if (bp->b_fname[0] == '\0') {
113: if ((status = readin(adjf)) != TRUE)
114: killbuffer(bp);
115: return (status);
116: }
117: return (TRUE);
1.1 deraadt 118: }
119:
1.17 vincent 120: int
121: filevisitro(int f, int n)
122: {
123: int error;
124:
125: error = filevisit(f, n);
126: if (error != TRUE)
127: return (error);
128: curbp->b_flag |= BFREADONLY;
129: return (TRUE);
130: }
1.32 db 131:
1.1 deraadt 132: /*
1.4 millert 133: * Pop to a file in the other window. Same as the last function, but uses
1.1 deraadt 134: * popbuf instead of showbuffer.
135: */
1.3 millert 136: /* ARGSUSED */
137: int
1.15 vincent 138: poptofile(int f, int n)
1.1 deraadt 139: {
1.45 deraadt 140: struct buffer *bp;
141: struct mgwin *wp;
1.29 vincent 142: char fname[NFILEN], *adjf, *bufp;
1.39 kjell 143: int status;
1.1 deraadt 144:
1.54 kjell 145: if (getbufcwd(fname, sizeof(fname)) != TRUE)
146: fname[0] = '\0';
1.29 vincent 147: if ((bufp = eread("Find file in other window: ", fname, NFILEN,
1.54 kjell 148: EFNEW | EFCR | EFFILE | EFDEF)) == NULL)
1.32 db 149: return (ABORT);
1.29 vincent 150: else if (bufp[0] == '\0')
1.32 db 151: return (FALSE);
1.58 jason 152: adjf = adjustname(fname, TRUE);
1.22 vincent 153: if (adjf == NULL)
154: return (FALSE);
1.3 millert 155: if ((bp = findbuffer(adjf)) == NULL)
1.32 db 156: return (FALSE);
1.56 kjell 157: if (bp == curbp)
158: return (splitwind(f, n));
1.3 millert 159: if ((wp = popbuf(bp)) == NULL)
1.32 db 160: return (FALSE);
1.1 deraadt 161: curbp = bp;
162: curwp = wp;
1.39 kjell 163: if (bp->b_fname[0] == '\0') {
1.30 jfb 164: if ((status = readin(adjf)) != TRUE)
165: killbuffer(bp);
1.32 db 166: return (status);
1.30 jfb 167: }
1.32 db 168: return (TRUE);
1.1 deraadt 169: }
170:
171: /*
1.32 db 172: * Given a file name, either find the buffer it uses, or create a new
1.1 deraadt 173: * empty buffer to put it in.
174: */
1.45 deraadt 175: struct buffer *
1.44 kjell 176: findbuffer(char *fn)
1.1 deraadt 177: {
1.52 deraadt 178: struct buffer *bp;
179: char bname[NBUFN], fname[NBUFN];
1.1 deraadt 180:
1.44 kjell 181: if (strlcpy(fname, fn, sizeof(fname)) >= sizeof(fname)) {
182: ewprintf("filename too long");
183: return (NULL);
184: }
185:
1.3 millert 186: for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
1.6 art 187: if (strcmp(bp->b_fname, fname) == 0)
1.32 db 188: return (bp);
1.1 deraadt 189: }
1.53 kjell 190: /* Not found. Create a new one, adjusting name first */
1.54 kjell 191: if (augbname(bname, fname, sizeof(bname)) == FALSE)
1.44 kjell 192: return (NULL);
1.10 vincent 193:
1.53 kjell 194: bp = bfind(bname, TRUE);
195: return (bp);
1.1 deraadt 196: }
197:
198: /*
1.9 mickey 199: * Read the file "fname" into the current buffer. Make all of the text
200: * in the buffer go away, after checking for unsaved changes. This is
201: * called by the "read" command, the "visit" command, and the mainline
1.19 vincent 202: * (for "mg file").
1.1 deraadt 203: */
1.3 millert 204: int
1.19 vincent 205: readin(char *fname)
1.3 millert 206: {
1.45 deraadt 207: struct mgwin *wp;
1.41 kjell 208: int status, i, ro = FALSE;
1.20 vincent 209: PF *ael;
1.1 deraadt 210:
1.4 millert 211: /* might be old */
212: if (bclear(curbp) != TRUE)
1.32 db 213: return (TRUE);
1.57 kjell 214: /* Clear readonly. May be set by autoexec path */
215: curbp->b_flag &=~ BFREADONLY;
1.30 jfb 216: if ((status = insertfile(fname, fname, TRUE)) != TRUE) {
217: ewprintf("File is not readable: %s", fname);
1.32 db 218: return (FALSE);
1.30 jfb 219: }
1.18 vincent 220:
1.57 kjell 221: for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
222: if (wp->w_bufp == curbp) {
1.62 kjell 223: wp->w_dotp = wp->w_linep = bfirstlp(curbp);
1.57 kjell 224: wp->w_doto = 0;
225: wp->w_markp = NULL;
226: wp->w_marko = 0;
227: }
228: }
229:
1.18 vincent 230: /*
231: * Call auto-executing function if we need to.
232: */
233: if ((ael = find_autoexec(fname)) != NULL) {
234: for (i = 0; ael[i] != NULL; i++)
235: (*ael[i])(0, 1);
236: free(ael);
237: }
1.4 millert 238:
239: /* no change */
240: curbp->b_flag &= ~BFCHG;
1.16 vincent 241:
1.41 kjell 242: /*
243: * We need to set the READONLY flag after we insert the file,
244: * unless the file is a directory.
245: */
1.16 vincent 246: if (access(fname, W_OK) && errno != ENOENT)
1.41 kjell 247: ro = TRUE;
248: if (fisdir(fname) == TRUE)
249: ro = TRUE;
250: if (ro == TRUE)
1.16 vincent 251: curbp->b_flag |= BFREADONLY;
1.25 deraadt 252:
1.65 pyr 253: if (startrow) {
1.24 deraadt 254: gotoline(FFARG, startrow);
1.65 pyr 255: startrow = 0;
256: }
1.16 vincent 257:
1.60 kjell 258: undo_add_modified();
1.32 db 259: return (status);
1.1 deraadt 260: }
1.4 millert 261:
1.1 deraadt 262: /*
263: * NB, getting file attributes is done here under control of a flag
264: * rather than in readin, which would be cleaner. I was concerned
265: * that some operating system might require the file to be open
266: * in order to get the information. Similarly for writing.
267: */
268:
269: /*
1.39 kjell 270: * Insert a file in the current buffer, after dot. If file is a directory,
271: * and 'replacebuf' is TRUE, invoke dired mode, else die with an error.
272: * If file is a regular file, set mark at the end of the text inserted;
1.47 kjell 273: * point at the beginning. Return a standard status. Print a summary
274: * (lines read, error message) out as well. This routine also does the
275: * read end of backup processing. The BFBAK flag, if set in a buffer,
276: * says that a backup should be taken. It is set when a file is read in,
277: * but not on a new file. You don't need to make a backup copy of nothing.
1.1 deraadt 278: */
1.47 kjell 279:
1.9 mickey 280: static char *line = NULL;
281: static int linesize = 0;
1.1 deraadt 282:
1.3 millert 283: int
1.39 kjell 284: insertfile(char *fname, char *newname, int replacebuf)
1.3 millert 285: {
1.45 deraadt 286: struct buffer *bp;
287: struct line *lp1, *lp2;
288: struct line *olp; /* line we started at */
289: struct mgwin *wp;
1.63 kjell 290: int nbytes, s, nline = 0, siz, x, x2;
1.19 vincent 291: int opos; /* offset we started at */
1.59 kjell 292: int oline; /* original line number */
1.66 kjell 293: char *dp;
1.4 millert 294:
1.39 kjell 295: if (replacebuf == TRUE)
1.23 vincent 296: x = undo_enable(FALSE);
1.63 kjell 297: else
298: x = undo_enabled();
1.23 vincent 299:
1.4 millert 300: lp1 = NULL;
1.1 deraadt 301: if (line == NULL) {
302: line = malloc(NLINE);
1.21 vincent 303: if (line == NULL)
304: panic("out of memory");
1.1 deraadt 305: linesize = NLINE;
306: }
1.4 millert 307:
308: /* cheap */
309: bp = curbp;
1.54 kjell 310: if (newname != NULL) {
311: (void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
1.66 kjell 312: dp = xdirname(newname);
313: (void)strlcpy(bp->b_cwd, dp, sizeof(bp->b_cwd));
1.54 kjell 314: (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
1.66 kjell 315: free(dp);
1.54 kjell 316: }
1.4 millert 317:
318: /* hard file open */
1.39 kjell 319: if ((s = ffropen(fname, (replacebuf == TRUE) ? bp : NULL)) == FIOERR)
1.1 deraadt 320: goto out;
1.4 millert 321: if (s == FIOFNF) {
322: /* file not found */
1.1 deraadt 323: if (newname != NULL)
324: ewprintf("(New file)");
1.3 millert 325: else
326: ewprintf("(File not found)");
1.1 deraadt 327: goto out;
1.40 kjell 328: } else if (s == FIODIR) {
329: /* file was a directory */
330: if (replacebuf == FALSE) {
331: ewprintf("Cannot insert: file is a directory, %s",
332: fname);
333: goto cleanup;
334: }
335: killbuffer(bp);
336: if ((bp = dired_(fname)) == NULL)
337: return (FALSE);
338: undo_enable(x);
339: curbp = bp;
1.55 kjell 340: return (showbuffer(bp, curwp, WFFULL | WFMODE));
1.54 kjell 341: } else {
1.66 kjell 342: dp = xdirname(fname);
343: (void)strlcpy(bp->b_cwd, dp, sizeof(bp->b_cwd));
1.54 kjell 344: (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
1.66 kjell 345: free(dp);
1.1 deraadt 346: }
347: opos = curwp->w_doto;
1.64 kjell 348: oline = curwp->w_dotline;
349: /*
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.
353: */
1.23 vincent 354: x2 = undo_enable(FALSE);
1.20 vincent 355: (void)lnewline();
1.1 deraadt 356: olp = lback(curwp->w_dotp);
1.23 vincent 357: undo_enable(x2);
1.4 millert 358:
359: nline = 0;
1.19 vincent 360: siz = 0;
1.3 millert 361: while ((s = ffgetline(line, linesize, &nbytes)) != FIOERR) {
1.64 kjell 362: retry:
1.19 vincent 363: siz += nbytes + 1;
1.3 millert 364: switch (s) {
365: case FIOSUC:
1.48 kjell 366: /* FALLTHRU */
1.4 millert 367: case FIOEOF:
1.59 kjell 368: ++nline;
1.3 millert 369: if ((lp1 = lalloc(nbytes)) == NULL) {
1.4 millert 370: /* keep message on the display */
371: s = FIOERR;
1.64 kjell 372: undo_add_insert(olp, opos,
373: siz - nbytes - 1 - 1);
1.4 millert 374: goto endoffile;
1.3 millert 375: }
376: bcopy(line, <ext(lp1)[0], nbytes);
377: lp2 = lback(curwp->w_dotp);
378: lp2->l_fp = lp1;
379: lp1->l_fp = curwp->w_dotp;
380: lp1->l_bp = lp2;
381: curwp->w_dotp->l_bp = lp1;
1.64 kjell 382: if (s == FIOEOF) {
383: undo_add_insert(olp, opos, siz - 1);
1.3 millert 384: goto endoffile;
1.64 kjell 385: }
1.3 millert 386: break;
1.19 vincent 387: case FIOLONG: {
1.4 millert 388: /* a line too long to fit in our buffer */
1.9 mickey 389: char *cp;
390: int newsize;
1.3 millert 391:
392: newsize = linesize * 2;
393: if (newsize < 0 ||
1.51 deraadt 394: (cp = malloc(newsize)) == NULL) {
1.3 millert 395: ewprintf("Could not allocate %d bytes",
1.4 millert 396: newsize);
397: s = FIOERR;
398: goto endoffile;
1.3 millert 399: }
400: bcopy(line, cp, linesize);
401: free(line);
402: line = cp;
1.9 mickey 403: s = ffgetline(line + linesize, linesize,
1.4 millert 404: &nbytes);
1.3 millert 405: nbytes += linesize;
406: linesize = newsize;
407: if (s == FIOERR)
408: goto endoffile;
1.64 kjell 409: goto retry;
1.3 millert 410: }
411: default:
412: ewprintf("Unknown code %d reading file", s);
413: s = FIOERR;
414: break;
1.1 deraadt 415: }
416: }
417: endoffile:
1.4 millert 418: /* ignore errors */
1.8 art 419: ffclose(NULL);
1.4 millert 420: /* don't zap an error */
421: if (s == FIOEOF) {
1.3 millert 422: if (nline == 1)
423: ewprintf("(Read 1 line)");
424: else
425: ewprintf("(Read %d lines)", nline);
1.1 deraadt 426: }
1.4 millert 427: /* set mark at the end of the text */
1.1 deraadt 428: curwp->w_dotp = curwp->w_markp = lback(curwp->w_dotp);
429: curwp->w_marko = llength(curwp->w_markp);
1.64 kjell 430: curwp->w_markline = oline + nline + 1;
431: /*
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
435: */
436: if (lforw(curwp->w_dotp) == curwp->w_bufp->b_headp) {
437: curwp->w_bufp->b_lines--;
438: curwp->w_markline--;
439: } else
440: (void)ldelnewline();
1.1 deraadt 441: curwp->w_dotp = olp;
442: curwp->w_doto = opos;
1.59 kjell 443: curwp->w_dotline = oline;
1.61 kjell 444: if (olp == curbp->b_headp)
1.3 millert 445: curwp->w_dotp = lforw(olp);
1.1 deraadt 446: if (newname != NULL)
1.3 millert 447: bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
448: else
449: bp->b_flag |= BFCHG;
450: /*
1.32 db 451: * If the insert was at the end of buffer, set lp1 to the end of
1.3 millert 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
455: * buffer.
1.1 deraadt 456: */
1.61 kjell 457: lp1 = bp->b_headp;
1.1 deraadt 458: if (curwp->w_markp == lp1) {
459: lp2 = curwp->w_dotp;
460: } else {
1.4 millert 461: /* delete extraneous newline */
1.7 art 462: (void)ldelnewline();
1.1 deraadt 463: out: lp2 = NULL;
464: }
1.3 millert 465: for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
1.1 deraadt 466: if (wp->w_bufp == curbp) {
1.3 millert 467: wp->w_flag |= WFMODE | WFEDIT;
1.1 deraadt 468: if (wp != curwp && lp2 != NULL) {
1.3 millert 469: if (wp->w_dotp == lp1)
470: wp->w_dotp = lp2;
471: if (wp->w_markp == lp1)
472: wp->w_markp = lp2;
473: if (wp->w_linep == lp1)
474: wp->w_linep = lp2;
1.1 deraadt 475: }
476: }
477: }
1.59 kjell 478: bp->b_lines += nline;
1.40 kjell 479: cleanup:
1.39 kjell 480: undo_enable(x);
1.23 vincent 481:
1.39 kjell 482: /* return FALSE if error */
1.32 db 483: return (s != FIOERR);
1.1 deraadt 484: }
485:
486: /*
1.9 mickey 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.
1.4 millert 489: * This handling of file names is different from the earlier versions and
1.27 jmc 490: * is more compatible with Gosling EMACS than with ITS EMACS.
1.1 deraadt 491: */
1.3 millert 492: /* ARGSUSED */
493: int
1.20 vincent 494: filewrite(int f, int n)
1.1 deraadt 495: {
1.4 millert 496: int s;
1.53 kjell 497: char fname[NFILEN], bn[NBUFN];
498: char *adjfname, *bufp;
1.29 vincent 499:
1.54 kjell 500: if (getbufcwd(fname, sizeof(fname)) != TRUE)
501: fname[0] = '\0';
1.29 vincent 502: if ((bufp = eread("Write file: ", fname, NFILEN,
1.54 kjell 503: EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
1.32 db 504: return (ABORT);
1.29 vincent 505: else if (bufp[0] == '\0')
1.32 db 506: return (FALSE);
1.1 deraadt 507:
1.58 jason 508: adjfname = adjustname(fname, TRUE);
1.22 vincent 509: if (adjfname == NULL)
510: return (FALSE);
1.1 deraadt 511: /* old attributes are no longer current */
512: bzero(&curbp->b_fi, sizeof(curbp->b_fi));
1.3 millert 513: if ((s = writeout(curbp, adjfname)) == TRUE) {
1.53 kjell 514: (void)strlcpy(curbp->b_fname, adjfname, sizeof(curbp->b_fname));
1.54 kjell 515: if (getbufcwd(curbp->b_cwd, sizeof(curbp->b_cwd)) != TRUE)
516: (void)strlcpy(curbp->b_cwd, "/", sizeof(curbp->b_cwd));
517: if (augbname(bn, basename(curbp->b_fname), sizeof(bn))
1.53 kjell 518: == FALSE)
519: return (FALSE);
1.67 ! kjell 520: free(curbp->b_bname);
1.53 kjell 521: if ((curbp->b_bname = strdup(bn)) == NULL)
522: return (FALSE);
1.1 deraadt 523: curbp->b_flag &= ~(BFBAK | BFCHG);
524: upmodes(curbp);
525: }
1.32 db 526: return (s);
1.1 deraadt 527: }
528:
529: /*
1.4 millert 530: * Save the contents of the current buffer back into its associated file.
1.1 deraadt 531: */
532: #ifndef MAKEBACKUP
533: #define MAKEBACKUP TRUE
1.4 millert 534: #endif /* !MAKEBACKUP */
1.9 mickey 535: static int makebackup = MAKEBACKUP;
1.1 deraadt 536:
1.3 millert 537: /* ARGSUSED */
538: int
1.20 vincent 539: filesave(int f, int n)
1.1 deraadt 540: {
1.32 db 541: return (buffsave(curbp));
1.1 deraadt 542: }
543:
544: /*
1.9 mickey 545: * Save the contents of the buffer argument into its associated file. Do
546: * nothing if there have been no changes (is this a bug, or a feature?).
547: * Error if there is no remembered file name. If this is the first write
1.4 millert 548: * since the read or visit, then a backup copy of the file is made.
1.9 mickey 549: * Allow user to select whether or not to make backup files by looking at
1.4 millert 550: * the value of makebackup.
1.1 deraadt 551: */
1.3 millert 552: int
1.45 deraadt 553: buffsave(struct buffer *bp)
1.3 millert 554: {
1.4 millert 555: int s;
1.1 deraadt 556:
1.4 millert 557: /* return, no changes */
558: if ((bp->b_flag & BFCHG) == 0) {
1.1 deraadt 559: ewprintf("(No changes need to be saved)");
1.32 db 560: return (TRUE);
1.1 deraadt 561: }
1.4 millert 562:
563: /* must have a name */
564: if (bp->b_fname[0] == '\0') {
1.1 deraadt 565: ewprintf("No file name");
566: return (FALSE);
567: }
1.4 millert 568:
1.3 millert 569: if (makebackup && (bp->b_flag & BFBAK)) {
1.1 deraadt 570: s = fbackupfile(bp->b_fname);
1.4 millert 571: /* hard error */
572: if (s == ABORT)
1.32 db 573: return (FALSE);
1.4 millert 574: /* softer error */
1.9 mickey 575: if (s == FALSE &&
1.4 millert 576: (s = eyesno("Backup error, save anyway")) != TRUE)
1.32 db 577: return (s);
1.1 deraadt 578: }
1.3 millert 579: if ((s = writeout(bp, bp->b_fname)) == TRUE) {
1.1 deraadt 580: bp->b_flag &= ~(BFCHG | BFBAK);
581: upmodes(bp);
582: }
1.32 db 583: return (s);
1.1 deraadt 584: }
585:
1.3 millert 586: /*
587: * Since we don't have variables (we probably should) this is a command
588: * processor for changing the value of the make backup flag. If no argument
589: * is given, sets makebackup to true, so backups are made. If an argument is
1.59 kjell 590: * given, no backup files are made when saving a new version of a file.
1.1 deraadt 591: */
1.3 millert 592: /* ARGSUSED */
593: int
1.20 vincent 594: makebkfile(int f, int n)
1.1 deraadt 595: {
1.3 millert 596: if (f & FFARG)
597: makebackup = n > 0;
598: else
599: makebackup = !makebackup;
1.1 deraadt 600: ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
1.32 db 601: return (TRUE);
1.1 deraadt 602: }
603:
604: /*
605: * NB: bp is passed to both ffwopen and ffclose because some
606: * attribute information may need to be updated at open time
607: * and others after the close. This is OS-dependent. Note
608: * that the ff routines are assumed to be able to tell whether
609: * the attribute information has been set up in this buffer
610: * or not.
611: */
612:
613: /*
1.9 mickey 614: * This function performs the details of file writing; writing the file
615: * in buffer bp to file fn. Uses the file management routines in the
1.4 millert 616: * "fileio.c" package. Most of the grief is checking of some sort.
1.1 deraadt 617: */
1.3 millert 618: int
1.45 deraadt 619: writeout(struct buffer *bp, char *fn)
1.3 millert 620: {
1.4 millert 621: int s;
1.1 deraadt 622:
1.4 millert 623: /* open writes message */
624: if ((s = ffwopen(fn, bp)) != FIOSUC)
1.1 deraadt 625: return (FALSE);
626: s = ffputbuf(bp);
1.4 millert 627: if (s == FIOSUC) {
628: /* no write error */
1.1 deraadt 629: s = ffclose(bp);
1.3 millert 630: if (s == FIOSUC)
1.1 deraadt 631: ewprintf("Wrote %s", fn);
1.4 millert 632: } else
633: /* ignore close error if it is a write error */
1.7 art 634: (void)ffclose(bp);
1.32 db 635: return (s == FIOSUC);
1.1 deraadt 636: }
637:
638: /*
1.4 millert 639: * Tag all windows for bp (all windows if bp == NULL) as needing their
1.1 deraadt 640: * mode line updated.
641: */
1.7 art 642: void
1.45 deraadt 643: upmodes(struct buffer *bp)
1.3 millert 644: {
1.45 deraadt 645: struct mgwin *wp;
1.1 deraadt 646:
647: for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
1.3 millert 648: if (bp == NULL || curwp->w_bufp == bp)
649: wp->w_flag |= WFMODE;
1.66 kjell 650: }
651:
652: /*
653: * Same as dirname, except an empty string is returned in
654: * place of "/". This means we can always add a trailing
655: * slash and be correct.
656: * Unlike dirname, we allocate. Caller must free.
657: */
658: static char *
659: xdirname(const char *path)
660: {
661: char *dp;
662:
663: dp = dirname(path);
664: if (*dp && dp[0] == '/' && dp[1] == '\0')
665: return (strdup(""));
666:
667: return (strdup(dp));
1.1 deraadt 668: }
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