Annotation of src/usr.bin/mg/file.c, Revision 1.94
1.94 ! lum 1: /* $OpenBSD: file.c,v 1.93 2014/03/31 21:29:59 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: /*
1.9 mickey 174: * Read the file "fname" into the current buffer. Make all of the text
175: * in the buffer go away, after checking for unsaved changes. This is
176: * called by the "read" command, the "visit" command, and the mainline
1.19 vincent 177: * (for "mg file").
1.1 deraadt 178: */
1.3 millert 179: int
1.19 vincent 180: readin(char *fname)
1.3 millert 181: {
1.45 deraadt 182: struct mgwin *wp;
1.82 lum 183: struct stat statbuf;
1.41 kjell 184: int status, i, ro = FALSE;
1.20 vincent 185: PF *ael;
1.88 florian 186: char dp[NFILEN];
1.1 deraadt 187:
1.4 millert 188: /* might be old */
189: if (bclear(curbp) != TRUE)
1.32 db 190: return (TRUE);
1.57 kjell 191: /* Clear readonly. May be set by autoexec path */
1.68 kjell 192: curbp->b_flag &= ~BFREADONLY;
1.30 jfb 193: if ((status = insertfile(fname, fname, TRUE)) != TRUE) {
1.92 lum 194: dobeep();
1.30 jfb 195: ewprintf("File is not readable: %s", fname);
1.32 db 196: return (FALSE);
1.30 jfb 197: }
1.18 vincent 198:
1.57 kjell 199: for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
200: if (wp->w_bufp == curbp) {
1.81 lum 201: wp->w_dotp = wp->w_linep = bfirstlp(curbp);
202: wp->w_doto = 0;
203: wp->w_markp = NULL;
204: wp->w_marko = 0;
1.57 kjell 205: }
206: }
207:
1.18 vincent 208: /*
209: * Call auto-executing function if we need to.
210: */
211: if ((ael = find_autoexec(fname)) != NULL) {
212: for (i = 0; ael[i] != NULL; i++)
213: (*ael[i])(0, 1);
214: free(ael);
215: }
1.4 millert 216:
217: /* no change */
218: curbp->b_flag &= ~BFCHG;
1.16 vincent 219:
1.41 kjell 220: /*
1.82 lum 221: * Set the buffer READONLY flag if any of following are true:
222: * 1. file is a directory.
223: * 2. file is read-only.
224: * 3. file doesn't exist and directory is read-only.
1.41 kjell 225: */
1.82 lum 226: if (fisdir(fname) == TRUE) {
1.41 kjell 227: ro = TRUE;
1.93 lum 228: } else if ((access(fname, W_OK) == -1) && (errno != ENOENT)) {
229: ro = TRUE;
230: } else if (errno == ENOENT) {
231: (void)xdirname(dp, fname, sizeof(dp));
232: (void)strlcat(dp, "/", sizeof(dp));
233:
1.94 ! lum 234: /* Missing directory; keep buffer read-write, like emacs */
1.93 lum 235: if (stat(dp, &statbuf) == -1 && errno == ENOENT) {
1.94 ! lum 236: if (eyorn("Missing directory, create") == TRUE)
! 237: (void)do_makedir(dp);
1.93 lum 238: } else if (access(dp, W_OK) == -1 && errno == EACCES) {
239: ewprintf("File not found and directory"
240: " write-protected");
1.82 lum 241: ro = TRUE;
242: }
243: }
1.41 kjell 244: if (ro == TRUE)
1.16 vincent 245: curbp->b_flag |= BFREADONLY;
1.25 deraadt 246:
1.65 pyr 247: if (startrow) {
1.24 deraadt 248: gotoline(FFARG, startrow);
1.65 pyr 249: startrow = 0;
250: }
1.16 vincent 251:
1.60 kjell 252: undo_add_modified();
1.32 db 253: return (status);
1.1 deraadt 254: }
1.4 millert 255:
1.1 deraadt 256: /*
257: * NB, getting file attributes is done here under control of a flag
258: * rather than in readin, which would be cleaner. I was concerned
259: * that some operating system might require the file to be open
260: * in order to get the information. Similarly for writing.
261: */
262:
263: /*
1.39 kjell 264: * Insert a file in the current buffer, after dot. If file is a directory,
265: * and 'replacebuf' is TRUE, invoke dired mode, else die with an error.
266: * If file is a regular file, set mark at the end of the text inserted;
1.47 kjell 267: * point at the beginning. Return a standard status. Print a summary
268: * (lines read, error message) out as well. This routine also does the
269: * read end of backup processing. The BFBAK flag, if set in a buffer,
270: * says that a backup should be taken. It is set when a file is read in,
271: * but not on a new file. You don't need to make a backup copy of nothing.
1.1 deraadt 272: */
1.47 kjell 273:
1.9 mickey 274: static char *line = NULL;
275: static int linesize = 0;
1.1 deraadt 276:
1.3 millert 277: int
1.39 kjell 278: insertfile(char *fname, char *newname, int replacebuf)
1.3 millert 279: {
1.45 deraadt 280: struct buffer *bp;
281: struct line *lp1, *lp2;
282: struct line *olp; /* line we started at */
283: struct mgwin *wp;
1.63 kjell 284: int nbytes, s, nline = 0, siz, x, x2;
1.19 vincent 285: int opos; /* offset we started at */
1.59 kjell 286: int oline; /* original line number */
1.80 lum 287: FILE *ffp;
1.4 millert 288:
1.39 kjell 289: if (replacebuf == TRUE)
1.69 kjell 290: x = undo_enable(FFRAND, 0);
1.63 kjell 291: else
292: x = undo_enabled();
1.23 vincent 293:
1.4 millert 294: lp1 = NULL;
1.1 deraadt 295: if (line == NULL) {
296: line = malloc(NLINE);
1.21 vincent 297: if (line == NULL)
298: panic("out of memory");
1.1 deraadt 299: linesize = NLINE;
300: }
1.4 millert 301:
302: /* cheap */
303: bp = curbp;
1.54 kjell 304: if (newname != NULL) {
305: (void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
1.75 kjell 306: (void)xdirname(bp->b_cwd, newname, sizeof(bp->b_cwd));
1.54 kjell 307: (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
308: }
1.4 millert 309:
310: /* hard file open */
1.80 lum 311: if ((s = ffropen(&ffp, fname, (replacebuf == TRUE) ? bp : NULL))
312: == FIOERR)
1.1 deraadt 313: goto out;
1.4 millert 314: if (s == FIOFNF) {
315: /* file not found */
1.1 deraadt 316: if (newname != NULL)
317: ewprintf("(New file)");
1.3 millert 318: else
319: ewprintf("(File not found)");
1.1 deraadt 320: goto out;
1.40 kjell 321: } else if (s == FIODIR) {
322: /* file was a directory */
323: if (replacebuf == FALSE) {
1.92 lum 324: dobeep();
1.40 kjell 325: ewprintf("Cannot insert: file is a directory, %s",
326: fname);
327: goto cleanup;
328: }
329: killbuffer(bp);
1.75 kjell 330: bp = dired_(fname);
331: undo_enable(FFRAND, x);
332: if (bp == NULL)
1.40 kjell 333: return (FALSE);
334: curbp = bp;
1.55 kjell 335: return (showbuffer(bp, curwp, WFFULL | WFMODE));
1.54 kjell 336: } else {
1.75 kjell 337: (void)xdirname(bp->b_cwd, fname, sizeof(bp->b_cwd));
1.54 kjell 338: (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
1.1 deraadt 339: }
340: opos = curwp->w_doto;
1.64 kjell 341: oline = curwp->w_dotline;
342: /*
343: * Open a new line at dot and start inserting after it.
344: * We will delete this newline after insertion.
345: * Disable undo, as we create the undo record manually.
346: */
1.69 kjell 347: x2 = undo_enable(FFRAND, 0);
1.20 vincent 348: (void)lnewline();
1.1 deraadt 349: olp = lback(curwp->w_dotp);
1.69 kjell 350: undo_enable(FFRAND, x2);
1.4 millert 351:
352: nline = 0;
1.19 vincent 353: siz = 0;
1.80 lum 354: while ((s = ffgetline(ffp, line, linesize, &nbytes)) != FIOERR) {
1.64 kjell 355: retry:
1.19 vincent 356: siz += nbytes + 1;
1.3 millert 357: switch (s) {
358: case FIOSUC:
1.48 kjell 359: /* FALLTHRU */
1.4 millert 360: case FIOEOF:
1.59 kjell 361: ++nline;
1.3 millert 362: if ((lp1 = lalloc(nbytes)) == NULL) {
1.4 millert 363: /* keep message on the display */
364: s = FIOERR;
1.64 kjell 365: undo_add_insert(olp, opos,
366: siz - nbytes - 1 - 1);
1.4 millert 367: goto endoffile;
1.3 millert 368: }
369: bcopy(line, <ext(lp1)[0], nbytes);
370: lp2 = lback(curwp->w_dotp);
371: lp2->l_fp = lp1;
372: lp1->l_fp = curwp->w_dotp;
373: lp1->l_bp = lp2;
374: curwp->w_dotp->l_bp = lp1;
1.64 kjell 375: if (s == FIOEOF) {
376: undo_add_insert(olp, opos, siz - 1);
1.3 millert 377: goto endoffile;
1.64 kjell 378: }
1.3 millert 379: break;
1.19 vincent 380: case FIOLONG: {
1.4 millert 381: /* a line too long to fit in our buffer */
1.9 mickey 382: char *cp;
383: int newsize;
1.3 millert 384:
385: newsize = linesize * 2;
386: if (newsize < 0 ||
1.51 deraadt 387: (cp = malloc(newsize)) == NULL) {
1.92 lum 388: dobeep();
1.3 millert 389: ewprintf("Could not allocate %d bytes",
1.4 millert 390: newsize);
391: s = FIOERR;
392: goto endoffile;
1.3 millert 393: }
394: bcopy(line, cp, linesize);
395: free(line);
396: line = cp;
1.80 lum 397: s = ffgetline(ffp, line + linesize, linesize,
1.4 millert 398: &nbytes);
1.3 millert 399: nbytes += linesize;
400: linesize = newsize;
401: if (s == FIOERR)
402: goto endoffile;
1.64 kjell 403: goto retry;
1.3 millert 404: }
405: default:
1.92 lum 406: dobeep();
1.3 millert 407: ewprintf("Unknown code %d reading file", s);
408: s = FIOERR;
409: break;
1.1 deraadt 410: }
411: }
412: endoffile:
1.4 millert 413: /* ignore errors */
1.80 lum 414: (void)ffclose(ffp, NULL);
1.4 millert 415: /* don't zap an error */
416: if (s == FIOEOF) {
1.3 millert 417: if (nline == 1)
418: ewprintf("(Read 1 line)");
419: else
420: ewprintf("(Read %d lines)", nline);
1.1 deraadt 421: }
1.4 millert 422: /* set mark at the end of the text */
1.1 deraadt 423: curwp->w_dotp = curwp->w_markp = lback(curwp->w_dotp);
424: curwp->w_marko = llength(curwp->w_markp);
1.64 kjell 425: curwp->w_markline = oline + nline + 1;
426: /*
427: * if we are at the end of the file, ldelnewline is a no-op,
428: * but we still need to decrement the line and markline counts
429: * as we've accounted for this fencepost in our arithmetic
430: */
431: if (lforw(curwp->w_dotp) == curwp->w_bufp->b_headp) {
432: curwp->w_bufp->b_lines--;
433: curwp->w_markline--;
434: } else
435: (void)ldelnewline();
1.1 deraadt 436: curwp->w_dotp = olp;
437: curwp->w_doto = opos;
1.59 kjell 438: curwp->w_dotline = oline;
1.61 kjell 439: if (olp == curbp->b_headp)
1.3 millert 440: curwp->w_dotp = lforw(olp);
1.1 deraadt 441: if (newname != NULL)
1.3 millert 442: bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
443: else
444: bp->b_flag |= BFCHG;
445: /*
1.32 db 446: * If the insert was at the end of buffer, set lp1 to the end of
1.3 millert 447: * buffer line, and lp2 to the beginning of the newly inserted text.
448: * (Otherwise lp2 is set to NULL.) This is used below to set
449: * pointers in other windows correctly if they are also at the end of
450: * buffer.
1.1 deraadt 451: */
1.61 kjell 452: lp1 = bp->b_headp;
1.1 deraadt 453: if (curwp->w_markp == lp1) {
454: lp2 = curwp->w_dotp;
455: } else {
1.4 millert 456: /* delete extraneous newline */
1.7 art 457: (void)ldelnewline();
1.1 deraadt 458: out: lp2 = NULL;
459: }
1.3 millert 460: for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
1.1 deraadt 461: if (wp->w_bufp == curbp) {
1.70 kjell 462: wp->w_rflag |= WFMODE | WFEDIT;
1.1 deraadt 463: if (wp != curwp && lp2 != NULL) {
1.3 millert 464: if (wp->w_dotp == lp1)
465: wp->w_dotp = lp2;
466: if (wp->w_markp == lp1)
467: wp->w_markp = lp2;
468: if (wp->w_linep == lp1)
469: wp->w_linep = lp2;
1.1 deraadt 470: }
471: }
472: }
1.59 kjell 473: bp->b_lines += nline;
1.40 kjell 474: cleanup:
1.69 kjell 475: undo_enable(FFRAND, x);
1.23 vincent 476:
1.39 kjell 477: /* return FALSE if error */
1.32 db 478: return (s != FIOERR);
1.1 deraadt 479: }
480:
481: /*
1.9 mickey 482: * Ask for a file name and write the contents of the current buffer to that
483: * file. Update the remembered file name and clear the buffer changed flag.
1.4 millert 484: * This handling of file names is different from the earlier versions and
1.27 jmc 485: * is more compatible with Gosling EMACS than with ITS EMACS.
1.1 deraadt 486: */
1.3 millert 487: /* ARGSUSED */
488: int
1.20 vincent 489: filewrite(int f, int n)
1.1 deraadt 490: {
1.77 lum 491: struct stat statbuf;
1.4 millert 492: int s;
1.77 lum 493: char fname[NFILEN], bn[NBUFN], tmp[NFILEN + 25];
1.53 kjell 494: char *adjfname, *bufp;
1.80 lum 495: FILE *ffp;
1.29 vincent 496:
1.54 kjell 497: if (getbufcwd(fname, sizeof(fname)) != TRUE)
498: fname[0] = '\0';
1.29 vincent 499: if ((bufp = eread("Write file: ", fname, NFILEN,
1.54 kjell 500: EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
1.32 db 501: return (ABORT);
1.29 vincent 502: else if (bufp[0] == '\0')
1.32 db 503: return (FALSE);
1.1 deraadt 504:
1.58 jason 505: adjfname = adjustname(fname, TRUE);
1.22 vincent 506: if (adjfname == NULL)
507: return (FALSE);
1.77 lum 508:
509: /* Check if file exists; write checks done later */
510: if (stat(adjfname, &statbuf) == 0) {
1.91 lum 511: if (S_ISDIR(statbuf.st_mode)) {
512: dobeep();
513: ewprintf("%s is a directory", adjfname);
514: return (FALSE);
515: }
1.77 lum 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);
1.87 florian 537: undo_add_boundary(FFRAND, 1);
538: undo_add_modified();
1.1 deraadt 539: }
1.32 db 540: return (s);
1.1 deraadt 541: }
542:
543: /*
1.4 millert 544: * Save the contents of the current buffer back into its associated file.
1.1 deraadt 545: */
546: #ifndef MAKEBACKUP
547: #define MAKEBACKUP TRUE
1.4 millert 548: #endif /* !MAKEBACKUP */
1.9 mickey 549: static int makebackup = MAKEBACKUP;
1.1 deraadt 550:
1.3 millert 551: /* ARGSUSED */
552: int
1.20 vincent 553: filesave(int f, int n)
1.1 deraadt 554: {
1.79 lum 555: if (curbp->b_fname[0] == '\0')
556: return (filewrite(f, n));
557: else
558: return (buffsave(curbp));
1.1 deraadt 559: }
560:
561: /*
1.9 mickey 562: * Save the contents of the buffer argument into its associated file. Do
563: * nothing if there have been no changes (is this a bug, or a feature?).
564: * Error if there is no remembered file name. If this is the first write
1.4 millert 565: * since the read or visit, then a backup copy of the file is made.
1.9 mickey 566: * Allow user to select whether or not to make backup files by looking at
1.4 millert 567: * the value of makebackup.
1.1 deraadt 568: */
1.3 millert 569: int
1.45 deraadt 570: buffsave(struct buffer *bp)
1.3 millert 571: {
1.4 millert 572: int s;
1.80 lum 573: FILE *ffp;
1.1 deraadt 574:
1.4 millert 575: /* return, no changes */
576: if ((bp->b_flag & BFCHG) == 0) {
1.1 deraadt 577: ewprintf("(No changes need to be saved)");
1.32 db 578: return (TRUE);
1.1 deraadt 579: }
1.4 millert 580:
581: /* must have a name */
582: if (bp->b_fname[0] == '\0') {
1.92 lum 583: dobeep();
1.1 deraadt 584: ewprintf("No file name");
585: return (FALSE);
586: }
1.4 millert 587:
1.68 kjell 588: /* Ensure file has not been modified elsewhere */
589: /* We don't use the ignore flag here */
590: if (fchecktime(bp) != TRUE) {
591: if ((s = eyesno("File has changed on disk since last save. "
592: "Save anyway")) != TRUE)
593: return (s);
594: }
595:
1.3 millert 596: if (makebackup && (bp->b_flag & BFBAK)) {
1.1 deraadt 597: s = fbackupfile(bp->b_fname);
1.4 millert 598: /* hard error */
599: if (s == ABORT)
1.32 db 600: return (FALSE);
1.4 millert 601: /* softer error */
1.9 mickey 602: if (s == FALSE &&
1.4 millert 603: (s = eyesno("Backup error, save anyway")) != TRUE)
1.32 db 604: return (s);
1.1 deraadt 605: }
1.80 lum 606: if ((s = writeout(&ffp, bp, bp->b_fname)) == TRUE) {
1.78 lum 607: (void)fupdstat(bp);
1.1 deraadt 608: bp->b_flag &= ~(BFCHG | BFBAK);
609: upmodes(bp);
1.87 florian 610: undo_add_boundary(FFRAND, 1);
611: undo_add_modified();
1.1 deraadt 612: }
1.32 db 613: return (s);
1.1 deraadt 614: }
615:
1.3 millert 616: /*
617: * Since we don't have variables (we probably should) this is a command
618: * processor for changing the value of the make backup flag. If no argument
619: * is given, sets makebackup to true, so backups are made. If an argument is
1.59 kjell 620: * given, no backup files are made when saving a new version of a file.
1.1 deraadt 621: */
1.3 millert 622: /* ARGSUSED */
623: int
1.20 vincent 624: makebkfile(int f, int n)
1.1 deraadt 625: {
1.3 millert 626: if (f & FFARG)
627: makebackup = n > 0;
628: else
629: makebackup = !makebackup;
1.1 deraadt 630: ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
1.32 db 631: return (TRUE);
1.1 deraadt 632: }
633:
634: /*
635: * NB: bp is passed to both ffwopen and ffclose because some
636: * attribute information may need to be updated at open time
637: * and others after the close. This is OS-dependent. Note
638: * that the ff routines are assumed to be able to tell whether
639: * the attribute information has been set up in this buffer
640: * or not.
641: */
642:
643: /*
1.9 mickey 644: * This function performs the details of file writing; writing the file
645: * in buffer bp to file fn. Uses the file management routines in the
1.4 millert 646: * "fileio.c" package. Most of the grief is checking of some sort.
1.78 lum 647: * You may want to call fupdstat() after using this function.
1.1 deraadt 648: */
1.3 millert 649: int
1.80 lum 650: writeout(FILE ** ffp, struct buffer *bp, char *fn)
1.3 millert 651: {
1.83 lum 652: struct stat statbuf;
1.4 millert 653: int s;
1.88 florian 654: char dp[NFILEN];
1.83 lum 655:
656: if (stat(fn, &statbuf) == -1 && errno == ENOENT) {
1.84 lum 657: errno = 0;
1.89 florian 658: (void)xdirname(dp, fn, sizeof(dp));
659: (void)strlcat(dp, "/", sizeof(dp));
1.83 lum 660: if (access(dp, W_OK) && errno == EACCES) {
1.92 lum 661: dobeep();
1.88 florian 662: ewprintf("Directory %s write-protected", dp);
1.83 lum 663: return (FIOERR);
664: } else if (errno == ENOENT) {
1.92 lum 665: dobeep();
666: ewprintf("%s: no such directory", dp);
1.83 lum 667: return (FIOERR);
668: }
669: }
1.4 millert 670: /* open writes message */
1.80 lum 671: if ((s = ffwopen(ffp, fn, bp)) != FIOSUC)
1.1 deraadt 672: return (FALSE);
1.80 lum 673: s = ffputbuf(*ffp, bp);
1.4 millert 674: if (s == FIOSUC) {
675: /* no write error */
1.80 lum 676: s = ffclose(*ffp, bp);
1.3 millert 677: if (s == FIOSUC)
1.1 deraadt 678: ewprintf("Wrote %s", fn);
1.76 lum 679: } else {
680: /* print a message indicating write error */
1.80 lum 681: (void)ffclose(*ffp, bp);
1.92 lum 682: dobeep();
1.76 lum 683: ewprintf("Unable to write %s", fn);
684: }
1.32 db 685: return (s == FIOSUC);
1.1 deraadt 686: }
687:
688: /*
1.4 millert 689: * Tag all windows for bp (all windows if bp == NULL) as needing their
1.1 deraadt 690: * mode line updated.
691: */
1.7 art 692: void
1.45 deraadt 693: upmodes(struct buffer *bp)
1.3 millert 694: {
1.45 deraadt 695: struct mgwin *wp;
1.1 deraadt 696:
697: for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
1.3 millert 698: if (bp == NULL || curwp->w_bufp == bp)
1.70 kjell 699: wp->w_rflag |= WFMODE;
1.66 kjell 700: }
701:
702: /*
1.75 kjell 703: * dirname using strlcpy semantic.
704: * Like dirname() except an empty string is returned in
1.66 kjell 705: * place of "/". This means we can always add a trailing
706: * slash and be correct.
1.75 kjell 707: * Address portability issues by copying argument
708: * before using. Some implementations modify the input string.
1.66 kjell 709: */
1.75 kjell 710: size_t
711: xdirname(char *dp, const char *path, size_t dplen)
1.66 kjell 712: {
1.75 kjell 713: char ts[NFILEN];
714: size_t len;
715:
716: (void)strlcpy(ts, path, NFILEN);
717: len = strlcpy(dp, dirname(ts), dplen);
718: if (dplen > 0 && dp[0] == '/' && dp[1] == '\0') {
719: dp[0] = '\0';
720: len = 0;
721: }
722: return (len);
723: }
724:
725: /*
726: * basename using strlcpy/strlcat semantic.
727: * Address portability issue by copying argument
728: * before using: some implementations modify the input string.
729: */
730: size_t
731: xbasename(char *bp, const char *path, size_t bplen)
732: {
733: char ts[NFILEN];
734:
735: (void)strlcpy(ts, path, NFILEN);
736: return (strlcpy(bp, basename(ts), bplen));
1.1 deraadt 737: }
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