Annotation of src/usr.bin/mg/file.c, Revision 1.81
1.81 ! lum 1: /* $OpenBSD: file.c,v 1.80 2012/05/25 04:56:58 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) {
1.81 ! lum 225: wp->w_dotp = wp->w_linep = bfirstlp(curbp);
! 226: wp->w_doto = 0;
! 227: wp->w_markp = NULL;
! 228: wp->w_marko = 0;
1.57 kjell 229: }
230: }
231:
1.18 vincent 232: /*
233: * Call auto-executing function if we need to.
234: */
235: if ((ael = find_autoexec(fname)) != NULL) {
236: for (i = 0; ael[i] != NULL; i++)
237: (*ael[i])(0, 1);
238: free(ael);
239: }
1.4 millert 240:
241: /* no change */
242: curbp->b_flag &= ~BFCHG;
1.16 vincent 243:
1.41 kjell 244: /*
245: * We need to set the READONLY flag after we insert the file,
246: * unless the file is a directory.
247: */
1.16 vincent 248: if (access(fname, W_OK) && errno != ENOENT)
1.41 kjell 249: ro = TRUE;
250: if (fisdir(fname) == TRUE)
251: ro = TRUE;
252: if (ro == TRUE)
1.16 vincent 253: curbp->b_flag |= BFREADONLY;
1.25 deraadt 254:
1.65 pyr 255: if (startrow) {
1.24 deraadt 256: gotoline(FFARG, startrow);
1.65 pyr 257: startrow = 0;
258: }
1.16 vincent 259:
1.60 kjell 260: undo_add_modified();
1.32 db 261: return (status);
1.1 deraadt 262: }
1.4 millert 263:
1.1 deraadt 264: /*
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.
269: */
270:
271: /*
1.39 kjell 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;
1.47 kjell 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.
1.1 deraadt 280: */
1.47 kjell 281:
1.9 mickey 282: static char *line = NULL;
283: static int linesize = 0;
1.1 deraadt 284:
1.3 millert 285: int
1.39 kjell 286: insertfile(char *fname, char *newname, int replacebuf)
1.3 millert 287: {
1.45 deraadt 288: struct buffer *bp;
289: struct line *lp1, *lp2;
290: struct line *olp; /* line we started at */
291: struct mgwin *wp;
1.63 kjell 292: int nbytes, s, nline = 0, siz, x, x2;
1.19 vincent 293: int opos; /* offset we started at */
1.59 kjell 294: int oline; /* original line number */
1.80 lum 295: FILE *ffp;
1.4 millert 296:
1.39 kjell 297: if (replacebuf == TRUE)
1.69 kjell 298: x = undo_enable(FFRAND, 0);
1.63 kjell 299: else
300: x = undo_enabled();
1.23 vincent 301:
1.4 millert 302: lp1 = NULL;
1.1 deraadt 303: if (line == NULL) {
304: line = malloc(NLINE);
1.21 vincent 305: if (line == NULL)
306: panic("out of memory");
1.1 deraadt 307: linesize = NLINE;
308: }
1.4 millert 309:
310: /* cheap */
311: bp = curbp;
1.54 kjell 312: if (newname != NULL) {
313: (void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
1.75 kjell 314: (void)xdirname(bp->b_cwd, newname, sizeof(bp->b_cwd));
1.54 kjell 315: (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
316: }
1.4 millert 317:
318: /* hard file open */
1.80 lum 319: if ((s = ffropen(&ffp, fname, (replacebuf == TRUE) ? bp : NULL))
320: == 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;
1.80 lum 361: while ((s = ffgetline(ffp, 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;
1.80 lum 403: s = ffgetline(ffp, 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 */
1.80 lum 419: (void)ffclose(ffp, 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;
1.80 lum 500: FILE *ffp;
1.29 vincent 501:
1.54 kjell 502: if (getbufcwd(fname, sizeof(fname)) != TRUE)
503: fname[0] = '\0';
1.29 vincent 504: if ((bufp = eread("Write file: ", fname, NFILEN,
1.54 kjell 505: EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
1.32 db 506: return (ABORT);
1.29 vincent 507: else if (bufp[0] == '\0')
1.32 db 508: return (FALSE);
1.1 deraadt 509:
1.58 jason 510: adjfname = adjustname(fname, TRUE);
1.22 vincent 511: if (adjfname == NULL)
512: return (FALSE);
1.77 lum 513:
514: /* Check if file exists; write checks done later */
515: if (stat(adjfname, &statbuf) == 0) {
516: snprintf(tmp, sizeof(tmp), "File `%s' exists; overwrite",
517: adjfname);
518: if ((s = eyorn(tmp)) != TRUE)
519: return (s);
520: }
521:
1.1 deraadt 522: /* old attributes are no longer current */
523: bzero(&curbp->b_fi, sizeof(curbp->b_fi));
1.80 lum 524: if ((s = writeout(&ffp, curbp, adjfname)) == TRUE) {
1.53 kjell 525: (void)strlcpy(curbp->b_fname, adjfname, sizeof(curbp->b_fname));
1.54 kjell 526: if (getbufcwd(curbp->b_cwd, sizeof(curbp->b_cwd)) != TRUE)
527: (void)strlcpy(curbp->b_cwd, "/", sizeof(curbp->b_cwd));
1.73 kjell 528: if (augbname(bn, curbp->b_fname, sizeof(bn))
1.53 kjell 529: == FALSE)
530: return (FALSE);
1.67 kjell 531: free(curbp->b_bname);
1.53 kjell 532: if ((curbp->b_bname = strdup(bn)) == NULL)
533: return (FALSE);
1.78 lum 534: (void)fupdstat(curbp);
1.1 deraadt 535: curbp->b_flag &= ~(BFBAK | BFCHG);
536: upmodes(curbp);
537: }
1.32 db 538: return (s);
1.1 deraadt 539: }
540:
541: /*
1.4 millert 542: * Save the contents of the current buffer back into its associated file.
1.1 deraadt 543: */
544: #ifndef MAKEBACKUP
545: #define MAKEBACKUP TRUE
1.4 millert 546: #endif /* !MAKEBACKUP */
1.9 mickey 547: static int makebackup = MAKEBACKUP;
1.1 deraadt 548:
1.3 millert 549: /* ARGSUSED */
550: int
1.20 vincent 551: filesave(int f, int n)
1.1 deraadt 552: {
1.79 lum 553: if (curbp->b_fname[0] == '\0')
554: return (filewrite(f, n));
555: else
556: return (buffsave(curbp));
1.1 deraadt 557: }
558:
559: /*
1.9 mickey 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
1.4 millert 563: * since the read or visit, then a backup copy of the file is made.
1.9 mickey 564: * Allow user to select whether or not to make backup files by looking at
1.4 millert 565: * the value of makebackup.
1.1 deraadt 566: */
1.3 millert 567: int
1.45 deraadt 568: buffsave(struct buffer *bp)
1.3 millert 569: {
1.4 millert 570: int s;
1.80 lum 571: FILE *ffp;
1.1 deraadt 572:
1.4 millert 573: /* return, no changes */
574: if ((bp->b_flag & BFCHG) == 0) {
1.1 deraadt 575: ewprintf("(No changes need to be saved)");
1.32 db 576: return (TRUE);
1.1 deraadt 577: }
1.4 millert 578:
579: /* must have a name */
580: if (bp->b_fname[0] == '\0') {
1.1 deraadt 581: ewprintf("No file name");
582: return (FALSE);
583: }
1.4 millert 584:
1.68 kjell 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)
590: return (s);
591: }
592:
1.3 millert 593: if (makebackup && (bp->b_flag & BFBAK)) {
1.1 deraadt 594: s = fbackupfile(bp->b_fname);
1.4 millert 595: /* hard error */
596: if (s == ABORT)
1.32 db 597: return (FALSE);
1.4 millert 598: /* softer error */
1.9 mickey 599: if (s == FALSE &&
1.4 millert 600: (s = eyesno("Backup error, save anyway")) != TRUE)
1.32 db 601: return (s);
1.1 deraadt 602: }
1.80 lum 603: if ((s = writeout(&ffp, bp, bp->b_fname)) == TRUE) {
1.78 lum 604: (void)fupdstat(bp);
1.1 deraadt 605: bp->b_flag &= ~(BFCHG | BFBAK);
606: upmodes(bp);
607: }
1.32 db 608: return (s);
1.1 deraadt 609: }
610:
1.3 millert 611: /*
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
1.59 kjell 615: * given, no backup files are made when saving a new version of a file.
1.1 deraadt 616: */
1.3 millert 617: /* ARGSUSED */
618: int
1.20 vincent 619: makebkfile(int f, int n)
1.1 deraadt 620: {
1.3 millert 621: if (f & FFARG)
622: makebackup = n > 0;
623: else
624: makebackup = !makebackup;
1.1 deraadt 625: ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
1.32 db 626: return (TRUE);
1.1 deraadt 627: }
628:
629: /*
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
635: * or not.
636: */
637:
638: /*
1.9 mickey 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
1.4 millert 641: * "fileio.c" package. Most of the grief is checking of some sort.
1.78 lum 642: * You may want to call fupdstat() after using this function.
1.1 deraadt 643: */
1.3 millert 644: int
1.80 lum 645: writeout(FILE ** ffp, struct buffer *bp, char *fn)
1.3 millert 646: {
1.4 millert 647: int s;
1.1 deraadt 648:
1.4 millert 649: /* open writes message */
1.80 lum 650: if ((s = ffwopen(ffp, fn, bp)) != FIOSUC)
1.1 deraadt 651: return (FALSE);
1.80 lum 652: s = ffputbuf(*ffp, bp);
1.4 millert 653: if (s == FIOSUC) {
654: /* no write error */
1.80 lum 655: s = ffclose(*ffp, bp);
1.3 millert 656: if (s == FIOSUC)
1.1 deraadt 657: ewprintf("Wrote %s", fn);
1.76 lum 658: } else {
659: /* print a message indicating write error */
1.80 lum 660: (void)ffclose(*ffp, bp);
1.76 lum 661: ewprintf("Unable to write %s", fn);
662: }
1.32 db 663: return (s == FIOSUC);
1.1 deraadt 664: }
665:
666: /*
1.4 millert 667: * Tag all windows for bp (all windows if bp == NULL) as needing their
1.1 deraadt 668: * mode line updated.
669: */
1.7 art 670: void
1.45 deraadt 671: upmodes(struct buffer *bp)
1.3 millert 672: {
1.45 deraadt 673: struct mgwin *wp;
1.1 deraadt 674:
675: for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
1.3 millert 676: if (bp == NULL || curwp->w_bufp == bp)
1.70 kjell 677: wp->w_rflag |= WFMODE;
1.66 kjell 678: }
679:
680: /*
1.75 kjell 681: * dirname using strlcpy semantic.
682: * Like dirname() except an empty string is returned in
1.66 kjell 683: * place of "/". This means we can always add a trailing
684: * slash and be correct.
1.75 kjell 685: * Address portability issues by copying argument
686: * before using. Some implementations modify the input string.
1.66 kjell 687: */
1.75 kjell 688: size_t
689: xdirname(char *dp, const char *path, size_t dplen)
1.66 kjell 690: {
1.75 kjell 691: char ts[NFILEN];
692: size_t len;
693:
694: (void)strlcpy(ts, path, NFILEN);
695: len = strlcpy(dp, dirname(ts), dplen);
696: if (dplen > 0 && dp[0] == '/' && dp[1] == '\0') {
697: dp[0] = '\0';
698: len = 0;
699: }
700: return (len);
701: }
702:
703: /*
704: * basename using strlcpy/strlcat semantic.
705: * Address portability issue by copying argument
706: * before using: some implementations modify the input string.
707: */
708: size_t
709: xbasename(char *bp, const char *path, size_t bplen)
710: {
711: char ts[NFILEN];
712:
713: (void)strlcpy(ts, path, NFILEN);
714: return (strlcpy(bp, basename(ts), bplen));
1.1 deraadt 715: }