Annotation of src/usr.bin/mg/file.c, Revision 1.77
1.77 ! lum 1: /* $OpenBSD: file.c,v 1.76 2011/08/31 08:58:29 lum 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:
1.74 kjell 9: #include "def.h"
10:
1.77 ! lum 11: #include <sys/stat.h>
! 12:
1.54 kjell 13: #include <libgen.h>
1.41 kjell 14:
1.75 kjell 15: size_t xdirname(char *, const char *, size_t);
1.66 kjell 16:
1.1 deraadt 17: /*
1.4 millert 18: * Insert a file into the current buffer. Real easy - just call the
1.1 deraadt 19: * insertfile routine with the file name.
20: */
1.3 millert 21: /* ARGSUSED */
22: int
1.15 vincent 23: fileinsert(int f, int n)
1.1 deraadt 24: {
1.29 vincent 25: char fname[NFILEN], *bufp, *adjf;
1.1 deraadt 26:
1.54 kjell 27: if (getbufcwd(fname, sizeof(fname)) != TRUE)
28: fname[0] = '\0';
29: bufp = eread("Insert file: ", fname, NFILEN,
30: EFNEW | EFCR | EFFILE | EFDEF);
1.29 vincent 31: if (bufp == NULL)
1.32 db 32: return (ABORT);
1.29 vincent 33: else if (bufp[0] == '\0')
1.32 db 34: return (FALSE);
1.58 jason 35: adjf = adjustname(bufp, TRUE);
1.22 vincent 36: if (adjf == NULL)
37: return (FALSE);
1.32 db 38: return (insertfile(adjf, NULL, FALSE));
1.1 deraadt 39: }
40:
41: /*
1.9 mickey 42: * Select a file for editing. Look around to see if you can find the file
1.4 millert 43: * in another buffer; if you can find it, just switch to the buffer. If
1.9 mickey 44: * you cannot find the file, create a new buffer, read in the text, and
1.4 millert 45: * switch to the new buffer.
1.1 deraadt 46: */
1.3 millert 47: /* ARGSUSED */
48: int
1.15 vincent 49: filevisit(int f, int n)
1.1 deraadt 50: {
1.45 deraadt 51: struct buffer *bp;
1.54 kjell 52: char fname[NFILEN], *bufp, *adjf;
1.39 kjell 53: int status;
1.34 cloder 54:
1.54 kjell 55: if (getbufcwd(fname, sizeof(fname)) != TRUE)
1.34 cloder 56: fname[0] = '\0';
1.38 kjell 57: bufp = eread("Find file: ", fname, NFILEN,
58: EFNEW | EFCR | EFFILE | EFDEF);
1.29 vincent 59: if (bufp == NULL)
1.32 db 60: return (ABORT);
1.29 vincent 61: else if (bufp[0] == '\0')
1.32 db 62: return (FALSE);
1.58 jason 63: adjf = adjustname(fname, TRUE);
1.22 vincent 64: if (adjf == NULL)
65: return (FALSE);
1.3 millert 66: if ((bp = findbuffer(adjf)) == NULL)
1.32 db 67: return (FALSE);
1.1 deraadt 68: curbp = bp;
1.55 kjell 69: if (showbuffer(bp, curwp, WFFULL) != TRUE)
1.32 db 70: return (FALSE);
1.39 kjell 71: if (bp->b_fname[0] == '\0') {
1.30 jfb 72: if ((status = readin(adjf)) != TRUE)
73: killbuffer(bp);
1.32 db 74: return (status);
1.30 jfb 75: }
1.32 db 76: return (TRUE);
1.35 jason 77: }
78:
1.36 kjell 79: /*
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.
84: */
1.43 kjell 85: /* ARGSUSED */
1.35 jason 86: int
87: filevisitalt(int f, int n)
88: {
1.45 deraadt 89: struct buffer *bp;
1.54 kjell 90: char fname[NFILEN], *bufp, *adjf;
1.36 kjell 91: int status;
92:
1.54 kjell 93: if (getbufcwd(fname, sizeof(fname)) != TRUE)
1.36 kjell 94: fname[0] = '\0';
95: bufp = eread("Find alternate file: ", fname, NFILEN,
96: EFNEW | EFCR | EFFILE | EFDEF);
97: if (bufp == NULL)
1.35 jason 98: return (ABORT);
1.36 kjell 99: else if (bufp[0] == '\0')
100: return (FALSE);
101:
102: status = killbuffer(curbp);
103: if (status == ABORT || status == FALSE)
104: return (ABORT);
105:
1.58 jason 106: adjf = adjustname(fname, TRUE);
1.36 kjell 107: if (adjf == NULL)
108: return (FALSE);
109: if ((bp = findbuffer(adjf)) == NULL)
110: return (FALSE);
111: curbp = bp;
1.55 kjell 112: if (showbuffer(bp, curwp, WFFULL) != TRUE)
1.36 kjell 113: return (FALSE);
114: if (bp->b_fname[0] == '\0') {
115: if ((status = readin(adjf)) != TRUE)
116: killbuffer(bp);
117: return (status);
118: }
119: return (TRUE);
1.1 deraadt 120: }
121:
1.17 vincent 122: int
123: filevisitro(int f, int n)
124: {
125: int error;
126:
127: error = filevisit(f, n);
128: if (error != TRUE)
129: return (error);
130: curbp->b_flag |= BFREADONLY;
131: return (TRUE);
132: }
1.32 db 133:
1.1 deraadt 134: /*
1.4 millert 135: * Pop to a file in the other window. Same as the last function, but uses
1.1 deraadt 136: * popbuf instead of showbuffer.
137: */
1.3 millert 138: /* ARGSUSED */
139: int
1.15 vincent 140: poptofile(int f, int n)
1.1 deraadt 141: {
1.45 deraadt 142: struct buffer *bp;
143: struct mgwin *wp;
1.29 vincent 144: char fname[NFILEN], *adjf, *bufp;
1.39 kjell 145: int status;
1.1 deraadt 146:
1.54 kjell 147: if (getbufcwd(fname, sizeof(fname)) != TRUE)
148: fname[0] = '\0';
1.29 vincent 149: if ((bufp = eread("Find file in other window: ", fname, NFILEN,
1.54 kjell 150: EFNEW | EFCR | EFFILE | EFDEF)) == NULL)
1.32 db 151: return (ABORT);
1.29 vincent 152: else if (bufp[0] == '\0')
1.32 db 153: return (FALSE);
1.58 jason 154: adjf = adjustname(fname, TRUE);
1.22 vincent 155: if (adjf == NULL)
156: return (FALSE);
1.3 millert 157: if ((bp = findbuffer(adjf)) == NULL)
1.32 db 158: return (FALSE);
1.56 kjell 159: if (bp == curbp)
160: return (splitwind(f, n));
1.71 kjell 161: if ((wp = popbuf(bp, WNONE)) == NULL)
1.32 db 162: return (FALSE);
1.1 deraadt 163: curbp = bp;
164: curwp = wp;
1.39 kjell 165: if (bp->b_fname[0] == '\0') {
1.30 jfb 166: if ((status = readin(adjf)) != TRUE)
167: killbuffer(bp);
1.32 db 168: return (status);
1.30 jfb 169: }
1.32 db 170: return (TRUE);
1.1 deraadt 171: }
172:
173: /*
1.32 db 174: * Given a file name, either find the buffer it uses, or create a new
1.1 deraadt 175: * empty buffer to put it in.
176: */
1.45 deraadt 177: struct buffer *
1.44 kjell 178: findbuffer(char *fn)
1.1 deraadt 179: {
1.52 deraadt 180: struct buffer *bp;
181: char bname[NBUFN], fname[NBUFN];
1.1 deraadt 182:
1.44 kjell 183: if (strlcpy(fname, fn, sizeof(fname)) >= sizeof(fname)) {
184: ewprintf("filename too long");
185: return (NULL);
186: }
187:
1.3 millert 188: for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
1.6 art 189: if (strcmp(bp->b_fname, fname) == 0)
1.32 db 190: return (bp);
1.1 deraadt 191: }
1.53 kjell 192: /* Not found. Create a new one, adjusting name first */
1.54 kjell 193: if (augbname(bname, fname, sizeof(bname)) == FALSE)
1.44 kjell 194: return (NULL);
1.10 vincent 195:
1.53 kjell 196: bp = bfind(bname, TRUE);
197: return (bp);
1.1 deraadt 198: }
199:
200: /*
1.9 mickey 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
1.19 vincent 204: * (for "mg file").
1.1 deraadt 205: */
1.3 millert 206: int
1.19 vincent 207: readin(char *fname)
1.3 millert 208: {
1.45 deraadt 209: struct mgwin *wp;
1.41 kjell 210: int status, i, ro = FALSE;
1.20 vincent 211: PF *ael;
1.1 deraadt 212:
1.4 millert 213: /* might be old */
214: if (bclear(curbp) != TRUE)
1.32 db 215: return (TRUE);
1.57 kjell 216: /* Clear readonly. May be set by autoexec path */
1.68 kjell 217: curbp->b_flag &= ~BFREADONLY;
1.30 jfb 218: if ((status = insertfile(fname, fname, TRUE)) != TRUE) {
219: ewprintf("File is not readable: %s", fname);
1.32 db 220: return (FALSE);
1.30 jfb 221: }
1.18 vincent 222:
1.57 kjell 223: for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
224: if (wp->w_bufp == curbp) {
1.72 kjell 225: if ((fisdir(fname)) != TRUE) {
226: wp->w_dotp = wp->w_linep = bfirstlp(curbp);
227: wp->w_doto = 0;
228: wp->w_markp = NULL;
229: wp->w_marko = 0;
230: }
1.57 kjell 231: }
232: }
233:
1.18 vincent 234: /*
235: * Call auto-executing function if we need to.
236: */
237: if ((ael = find_autoexec(fname)) != NULL) {
238: for (i = 0; ael[i] != NULL; i++)
239: (*ael[i])(0, 1);
240: free(ael);
241: }
1.4 millert 242:
243: /* no change */
244: curbp->b_flag &= ~BFCHG;
1.16 vincent 245:
1.41 kjell 246: /*
247: * We need to set the READONLY flag after we insert the file,
248: * unless the file is a directory.
249: */
1.16 vincent 250: if (access(fname, W_OK) && errno != ENOENT)
1.41 kjell 251: ro = TRUE;
252: if (fisdir(fname) == TRUE)
253: ro = TRUE;
254: if (ro == TRUE)
1.16 vincent 255: curbp->b_flag |= BFREADONLY;
1.25 deraadt 256:
1.65 pyr 257: if (startrow) {
1.24 deraadt 258: gotoline(FFARG, startrow);
1.65 pyr 259: startrow = 0;
260: }
1.16 vincent 261:
1.60 kjell 262: undo_add_modified();
1.32 db 263: return (status);
1.1 deraadt 264: }
1.4 millert 265:
1.1 deraadt 266: /*
267: * NB, getting file attributes is done here under control of a flag
268: * rather than in readin, which would be cleaner. I was concerned
269: * that some operating system might require the file to be open
270: * in order to get the information. Similarly for writing.
271: */
272:
273: /*
1.39 kjell 274: * Insert a file in the current buffer, after dot. If file is a directory,
275: * and 'replacebuf' is TRUE, invoke dired mode, else die with an error.
276: * If file is a regular file, set mark at the end of the text inserted;
1.47 kjell 277: * point at the beginning. Return a standard status. Print a summary
278: * (lines read, error message) out as well. This routine also does the
279: * read end of backup processing. The BFBAK flag, if set in a buffer,
280: * says that a backup should be taken. It is set when a file is read in,
281: * but not on a new file. You don't need to make a backup copy of nothing.
1.1 deraadt 282: */
1.47 kjell 283:
1.9 mickey 284: static char *line = NULL;
285: static int linesize = 0;
1.1 deraadt 286:
1.3 millert 287: int
1.39 kjell 288: insertfile(char *fname, char *newname, int replacebuf)
1.3 millert 289: {
1.45 deraadt 290: struct buffer *bp;
291: struct line *lp1, *lp2;
292: struct line *olp; /* line we started at */
293: struct mgwin *wp;
1.63 kjell 294: int nbytes, s, nline = 0, siz, x, x2;
1.19 vincent 295: int opos; /* offset we started at */
1.59 kjell 296: int oline; /* original line number */
1.4 millert 297:
1.39 kjell 298: if (replacebuf == TRUE)
1.69 kjell 299: x = undo_enable(FFRAND, 0);
1.63 kjell 300: else
301: x = undo_enabled();
1.23 vincent 302:
1.4 millert 303: lp1 = NULL;
1.1 deraadt 304: if (line == NULL) {
305: line = malloc(NLINE);
1.21 vincent 306: if (line == NULL)
307: panic("out of memory");
1.1 deraadt 308: linesize = NLINE;
309: }
1.4 millert 310:
311: /* cheap */
312: bp = curbp;
1.54 kjell 313: if (newname != NULL) {
314: (void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
1.75 kjell 315: (void)xdirname(bp->b_cwd, newname, sizeof(bp->b_cwd));
1.54 kjell 316: (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
317: }
1.4 millert 318:
319: /* hard file open */
1.39 kjell 320: if ((s = ffropen(fname, (replacebuf == TRUE) ? bp : NULL)) == FIOERR)
1.1 deraadt 321: goto out;
1.4 millert 322: if (s == FIOFNF) {
323: /* file not found */
1.1 deraadt 324: if (newname != NULL)
325: ewprintf("(New file)");
1.3 millert 326: else
327: ewprintf("(File not found)");
1.1 deraadt 328: goto out;
1.40 kjell 329: } else if (s == FIODIR) {
330: /* file was a directory */
331: if (replacebuf == FALSE) {
332: ewprintf("Cannot insert: file is a directory, %s",
333: fname);
334: goto cleanup;
335: }
336: killbuffer(bp);
1.75 kjell 337: bp = dired_(fname);
338: undo_enable(FFRAND, x);
339: if (bp == NULL)
1.40 kjell 340: return (FALSE);
341: curbp = bp;
1.55 kjell 342: return (showbuffer(bp, curwp, WFFULL | WFMODE));
1.54 kjell 343: } else {
1.75 kjell 344: (void)xdirname(bp->b_cwd, fname, sizeof(bp->b_cwd));
1.54 kjell 345: (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
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: */
1.69 kjell 354: x2 = undo_enable(FFRAND, 0);
1.20 vincent 355: (void)lnewline();
1.1 deraadt 356: olp = lback(curwp->w_dotp);
1.69 kjell 357: undo_enable(FFRAND, 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 */
1.76 lum 419: (void)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) {
1.70 kjell 467: wp->w_rflag |= 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:
1.69 kjell 480: undo_enable(FFRAND, 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: {
1.77 ! lum 496: struct stat statbuf;
1.4 millert 497: int s;
1.77 ! lum 498: char fname[NFILEN], bn[NBUFN], tmp[NFILEN + 25];
1.53 kjell 499: char *adjfname, *bufp;
1.29 vincent 500:
1.54 kjell 501: if (getbufcwd(fname, sizeof(fname)) != TRUE)
502: fname[0] = '\0';
1.29 vincent 503: if ((bufp = eread("Write file: ", fname, NFILEN,
1.54 kjell 504: EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
1.32 db 505: return (ABORT);
1.29 vincent 506: else if (bufp[0] == '\0')
1.32 db 507: return (FALSE);
1.1 deraadt 508:
1.58 jason 509: adjfname = adjustname(fname, TRUE);
1.22 vincent 510: if (adjfname == NULL)
511: return (FALSE);
1.77 ! lum 512:
! 513: /* Check if file exists; write checks done later */
! 514: if (stat(adjfname, &statbuf) == 0) {
! 515: snprintf(tmp, sizeof(tmp), "File `%s' exists; overwrite",
! 516: adjfname);
! 517: if ((s = eyorn(tmp)) != TRUE)
! 518: return (s);
! 519: }
! 520:
1.1 deraadt 521: /* old attributes are no longer current */
522: bzero(&curbp->b_fi, sizeof(curbp->b_fi));
1.3 millert 523: if ((s = writeout(curbp, adjfname)) == TRUE) {
1.53 kjell 524: (void)strlcpy(curbp->b_fname, adjfname, sizeof(curbp->b_fname));
1.54 kjell 525: if (getbufcwd(curbp->b_cwd, sizeof(curbp->b_cwd)) != TRUE)
526: (void)strlcpy(curbp->b_cwd, "/", sizeof(curbp->b_cwd));
1.73 kjell 527: if (augbname(bn, curbp->b_fname, sizeof(bn))
1.53 kjell 528: == FALSE)
529: return (FALSE);
1.67 kjell 530: free(curbp->b_bname);
1.53 kjell 531: if ((curbp->b_bname = strdup(bn)) == NULL)
532: return (FALSE);
1.1 deraadt 533: curbp->b_flag &= ~(BFBAK | BFCHG);
534: upmodes(curbp);
535: }
1.32 db 536: return (s);
1.1 deraadt 537: }
538:
539: /*
1.4 millert 540: * Save the contents of the current buffer back into its associated file.
1.1 deraadt 541: */
542: #ifndef MAKEBACKUP
543: #define MAKEBACKUP TRUE
1.4 millert 544: #endif /* !MAKEBACKUP */
1.9 mickey 545: static int makebackup = MAKEBACKUP;
1.1 deraadt 546:
1.3 millert 547: /* ARGSUSED */
548: int
1.20 vincent 549: filesave(int f, int n)
1.1 deraadt 550: {
1.32 db 551: return (buffsave(curbp));
1.1 deraadt 552: }
553:
554: /*
1.9 mickey 555: * Save the contents of the buffer argument into its associated file. Do
556: * nothing if there have been no changes (is this a bug, or a feature?).
557: * Error if there is no remembered file name. If this is the first write
1.4 millert 558: * since the read or visit, then a backup copy of the file is made.
1.9 mickey 559: * Allow user to select whether or not to make backup files by looking at
1.4 millert 560: * the value of makebackup.
1.1 deraadt 561: */
1.3 millert 562: int
1.45 deraadt 563: buffsave(struct buffer *bp)
1.3 millert 564: {
1.4 millert 565: int s;
1.1 deraadt 566:
1.4 millert 567: /* return, no changes */
568: if ((bp->b_flag & BFCHG) == 0) {
1.1 deraadt 569: ewprintf("(No changes need to be saved)");
1.32 db 570: return (TRUE);
1.1 deraadt 571: }
1.4 millert 572:
573: /* must have a name */
574: if (bp->b_fname[0] == '\0') {
1.1 deraadt 575: ewprintf("No file name");
576: return (FALSE);
577: }
1.4 millert 578:
1.68 kjell 579: /* Ensure file has not been modified elsewhere */
580: /* We don't use the ignore flag here */
581: if (fchecktime(bp) != TRUE) {
582: if ((s = eyesno("File has changed on disk since last save. "
583: "Save anyway")) != TRUE)
584: return (s);
585: }
586:
1.3 millert 587: if (makebackup && (bp->b_flag & BFBAK)) {
1.1 deraadt 588: s = fbackupfile(bp->b_fname);
1.4 millert 589: /* hard error */
590: if (s == ABORT)
1.32 db 591: return (FALSE);
1.4 millert 592: /* softer error */
1.9 mickey 593: if (s == FALSE &&
1.4 millert 594: (s = eyesno("Backup error, save anyway")) != TRUE)
1.32 db 595: return (s);
1.1 deraadt 596: }
1.3 millert 597: if ((s = writeout(bp, bp->b_fname)) == TRUE) {
1.1 deraadt 598: bp->b_flag &= ~(BFCHG | BFBAK);
599: upmodes(bp);
600: }
1.32 db 601: return (s);
1.1 deraadt 602: }
603:
1.3 millert 604: /*
605: * Since we don't have variables (we probably should) this is a command
606: * processor for changing the value of the make backup flag. If no argument
607: * is given, sets makebackup to true, so backups are made. If an argument is
1.59 kjell 608: * given, no backup files are made when saving a new version of a file.
1.1 deraadt 609: */
1.3 millert 610: /* ARGSUSED */
611: int
1.20 vincent 612: makebkfile(int f, int n)
1.1 deraadt 613: {
1.3 millert 614: if (f & FFARG)
615: makebackup = n > 0;
616: else
617: makebackup = !makebackup;
1.1 deraadt 618: ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
1.32 db 619: return (TRUE);
1.1 deraadt 620: }
621:
622: /*
623: * NB: bp is passed to both ffwopen and ffclose because some
624: * attribute information may need to be updated at open time
625: * and others after the close. This is OS-dependent. Note
626: * that the ff routines are assumed to be able to tell whether
627: * the attribute information has been set up in this buffer
628: * or not.
629: */
630:
631: /*
1.9 mickey 632: * This function performs the details of file writing; writing the file
633: * in buffer bp to file fn. Uses the file management routines in the
1.4 millert 634: * "fileio.c" package. Most of the grief is checking of some sort.
1.1 deraadt 635: */
1.3 millert 636: int
1.45 deraadt 637: writeout(struct buffer *bp, char *fn)
1.3 millert 638: {
1.4 millert 639: int s;
1.1 deraadt 640:
1.4 millert 641: /* open writes message */
642: if ((s = ffwopen(fn, bp)) != FIOSUC)
1.1 deraadt 643: return (FALSE);
644: s = ffputbuf(bp);
1.4 millert 645: if (s == FIOSUC) {
646: /* no write error */
1.1 deraadt 647: s = ffclose(bp);
1.3 millert 648: if (s == FIOSUC)
1.1 deraadt 649: ewprintf("Wrote %s", fn);
1.76 lum 650: } else {
651: /* print a message indicating write error */
1.7 art 652: (void)ffclose(bp);
1.76 lum 653: ewprintf("Unable to write %s", fn);
654: }
1.68 kjell 655: (void)fupdstat(bp);
1.32 db 656: return (s == FIOSUC);
1.1 deraadt 657: }
658:
659: /*
1.4 millert 660: * Tag all windows for bp (all windows if bp == NULL) as needing their
1.1 deraadt 661: * mode line updated.
662: */
1.7 art 663: void
1.45 deraadt 664: upmodes(struct buffer *bp)
1.3 millert 665: {
1.45 deraadt 666: struct mgwin *wp;
1.1 deraadt 667:
668: for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
1.3 millert 669: if (bp == NULL || curwp->w_bufp == bp)
1.70 kjell 670: wp->w_rflag |= WFMODE;
1.66 kjell 671: }
672:
673: /*
1.75 kjell 674: * dirname using strlcpy semantic.
675: * Like dirname() except an empty string is returned in
1.66 kjell 676: * place of "/". This means we can always add a trailing
677: * slash and be correct.
1.75 kjell 678: * Address portability issues by copying argument
679: * before using. Some implementations modify the input string.
1.66 kjell 680: */
1.75 kjell 681: size_t
682: xdirname(char *dp, const char *path, size_t dplen)
1.66 kjell 683: {
1.75 kjell 684: char ts[NFILEN];
685: size_t len;
686:
687: (void)strlcpy(ts, path, NFILEN);
688: len = strlcpy(dp, dirname(ts), dplen);
689: if (dplen > 0 && dp[0] == '/' && dp[1] == '\0') {
690: dp[0] = '\0';
691: len = 0;
692: }
693: return (len);
694: }
695:
696: /*
697: * basename using strlcpy/strlcat semantic.
698: * Address portability issue by copying argument
699: * before using: some implementations modify the input string.
700: */
701: size_t
702: xbasename(char *bp, const char *path, size_t bplen)
703: {
704: char ts[NFILEN];
705:
706: (void)strlcpy(ts, path, NFILEN);
707: return (strlcpy(bp, basename(ts), bplen));
1.1 deraadt 708: }
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