--- /dev/null
+/* $OpenBSD: file.c,v 1.81 2012/06/18 09:19:21 lum Exp $ */
+
+/* This file is in the public domain. */
+
+/*
+ * File commands.
+ */
+
+#include "def.h"
+
+#include <sys/stat.h>
+
+#include <libgen.h>
+
+size_t xdirname(char *, const char *, size_t);
+
+/*
+ * Insert a file into the current buffer. Real easy - just call the
+ * insertfile routine with the file name.
+ */
+/* ARGSUSED */
+int
+fileinsert(int f, int n)
+{
+ char fname[NFILEN], *bufp, *adjf;
+
+ if (getbufcwd(fname, sizeof(fname)) != TRUE)
+ fname[0] = '\0';
+ bufp = eread("Insert file: ", fname, NFILEN,
+ EFNEW | EFCR | EFFILE | EFDEF);
+ if (bufp == NULL)
+ return (ABORT);
+ else if (bufp[0] == '\0')
+ return (FALSE);
+ adjf = adjustname(bufp, TRUE);
+ if (adjf == NULL)
+ return (FALSE);
+ return (insertfile(adjf, NULL, FALSE));
+}
+
+/*
+ * Select a file for editing. Look around to see if you can find the file
+ * in another buffer; if you can find it, just switch to the buffer. If
+ * you cannot find the file, create a new buffer, read in the text, and
+ * switch to the new buffer.
+ */
+/* ARGSUSED */
+int
+filevisit(int f, int n)
+{
+ struct buffer *bp;
+ char fname[NFILEN], *bufp, *adjf;
+ int status;
+
+ if (getbufcwd(fname, sizeof(fname)) != TRUE)
+ fname[0] = '\0';
+ bufp = eread("Find file: ", fname, NFILEN,
+ EFNEW | EFCR | EFFILE | EFDEF);
+ if (bufp == NULL)
+ return (ABORT);
+ else if (bufp[0] == '\0')
+ return (FALSE);
+ adjf = adjustname(fname, TRUE);
+ if (adjf == NULL)
+ return (FALSE);
+ if ((bp = findbuffer(adjf)) == NULL)
+ return (FALSE);
+ curbp = bp;
+ if (showbuffer(bp, curwp, WFFULL) != TRUE)
+ return (FALSE);
+ if (bp->b_fname[0] == '\0') {
+ if ((status = readin(adjf)) != TRUE)
+ killbuffer(bp);
+ return (status);
+ }
+ return (TRUE);
+}
+
+/*
+ * Replace the current file with an alternate one. Semantics for finding
+ * the replacement file are the same as 'filevisit', except the current
+ * buffer is killed before the switch. If the kill fails, or is aborted,
+ * revert to the original file.
+ */
+/* ARGSUSED */
+int
+filevisitalt(int f, int n)
+{
+ struct buffer *bp;
+ char fname[NFILEN], *bufp, *adjf;
+ int status;
+
+ if (getbufcwd(fname, sizeof(fname)) != TRUE)
+ fname[0] = '\0';
+ bufp = eread("Find alternate file: ", fname, NFILEN,
+ EFNEW | EFCR | EFFILE | EFDEF);
+ if (bufp == NULL)
+ return (ABORT);
+ else if (bufp[0] == '\0')
+ return (FALSE);
+
+ status = killbuffer(curbp);
+ if (status == ABORT || status == FALSE)
+ return (ABORT);
+
+ adjf = adjustname(fname, TRUE);
+ if (adjf == NULL)
+ return (FALSE);
+ if ((bp = findbuffer(adjf)) == NULL)
+ return (FALSE);
+ curbp = bp;
+ if (showbuffer(bp, curwp, WFFULL) != TRUE)
+ return (FALSE);
+ if (bp->b_fname[0] == '\0') {
+ if ((status = readin(adjf)) != TRUE)
+ killbuffer(bp);
+ return (status);
+ }
+ return (TRUE);
+}
+
+int
+filevisitro(int f, int n)
+{
+ int error;
+
+ error = filevisit(f, n);
+ if (error != TRUE)
+ return (error);
+ curbp->b_flag |= BFREADONLY;
+ return (TRUE);
+}
+
+/*
+ * Pop to a file in the other window. Same as the last function, but uses
+ * popbuf instead of showbuffer.
+ */
+/* ARGSUSED */
+int
+poptofile(int f, int n)
+{
+ struct buffer *bp;
+ struct mgwin *wp;
+ char fname[NFILEN], *adjf, *bufp;
+ int status;
+
+ if (getbufcwd(fname, sizeof(fname)) != TRUE)
+ fname[0] = '\0';
+ if ((bufp = eread("Find file in other window: ", fname, NFILEN,
+ EFNEW | EFCR | EFFILE | EFDEF)) == NULL)
+ return (ABORT);
+ else if (bufp[0] == '\0')
+ return (FALSE);
+ adjf = adjustname(fname, TRUE);
+ if (adjf == NULL)
+ return (FALSE);
+ if ((bp = findbuffer(adjf)) == NULL)
+ return (FALSE);
+ if (bp == curbp)
+ return (splitwind(f, n));
+ if ((wp = popbuf(bp, WNONE)) == NULL)
+ return (FALSE);
+ curbp = bp;
+ curwp = wp;
+ if (bp->b_fname[0] == '\0') {
+ if ((status = readin(adjf)) != TRUE)
+ killbuffer(bp);
+ return (status);
+ }
+ return (TRUE);
+}
+
+/*
+ * Given a file name, either find the buffer it uses, or create a new
+ * empty buffer to put it in.
+ */
+struct buffer *
+findbuffer(char *fn)
+{
+ struct buffer *bp;
+ char bname[NBUFN], fname[NBUFN];
+
+ if (strlcpy(fname, fn, sizeof(fname)) >= sizeof(fname)) {
+ ewprintf("filename too long");
+ return (NULL);
+ }
+
+ for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
+ if (strcmp(bp->b_fname, fname) == 0)
+ return (bp);
+ }
+ /* Not found. Create a new one, adjusting name first */
+ if (augbname(bname, fname, sizeof(bname)) == FALSE)
+ return (NULL);
+
+ bp = bfind(bname, TRUE);
+ return (bp);
+}
+
+/*
+ * Read the file "fname" into the current buffer. Make all of the text
+ * in the buffer go away, after checking for unsaved changes. This is
+ * called by the "read" command, the "visit" command, and the mainline
+ * (for "mg file").
+ */
+int
+readin(char *fname)
+{
+ struct mgwin *wp;
+ int status, i, ro = FALSE;
+ PF *ael;
+
+ /* might be old */
+ if (bclear(curbp) != TRUE)
+ return (TRUE);
+ /* Clear readonly. May be set by autoexec path */
+ curbp->b_flag &= ~BFREADONLY;
+ if ((status = insertfile(fname, fname, TRUE)) != TRUE) {
+ ewprintf("File is not readable: %s", fname);
+ return (FALSE);
+ }
+
+ for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
+ if (wp->w_bufp == curbp) {
+ wp->w_dotp = wp->w_linep = bfirstlp(curbp);
+ wp->w_doto = 0;
+ wp->w_markp = NULL;
+ wp->w_marko = 0;
+ }
+ }
+
+ /*
+ * Call auto-executing function if we need to.
+ */
+ if ((ael = find_autoexec(fname)) != NULL) {
+ for (i = 0; ael[i] != NULL; i++)
+ (*ael[i])(0, 1);
+ free(ael);
+ }
+
+ /* no change */
+ curbp->b_flag &= ~BFCHG;
+
+ /*
+ * We need to set the READONLY flag after we insert the file,
+ * unless the file is a directory.
+ */
+ if (access(fname, W_OK) && errno != ENOENT)
+ ro = TRUE;
+ if (fisdir(fname) == TRUE)
+ ro = TRUE;
+ if (ro == TRUE)
+ curbp->b_flag |= BFREADONLY;
+
+ if (startrow) {
+ gotoline(FFARG, startrow);
+ startrow = 0;
+ }
+
+ undo_add_modified();
+ return (status);
+}
+
+/*
+ * NB, getting file attributes is done here under control of a flag
+ * rather than in readin, which would be cleaner. I was concerned
+ * that some operating system might require the file to be open
+ * in order to get the information. Similarly for writing.
+ */
+
+/*
+ * Insert a file in the current buffer, after dot. If file is a directory,
+ * and 'replacebuf' is TRUE, invoke dired mode, else die with an error.
+ * If file is a regular file, set mark at the end of the text inserted;
+ * point at the beginning. Return a standard status. Print a summary
+ * (lines read, error message) out as well. This routine also does the
+ * read end of backup processing. The BFBAK flag, if set in a buffer,
+ * says that a backup should be taken. It is set when a file is read in,
+ * but not on a new file. You don't need to make a backup copy of nothing.
+ */
+
+static char *line = NULL;
+static int linesize = 0;
+
+int
+insertfile(char *fname, char *newname, int replacebuf)
+{
+ struct buffer *bp;
+ struct line *lp1, *lp2;
+ struct line *olp; /* line we started at */
+ struct mgwin *wp;
+ int nbytes, s, nline = 0, siz, x, x2;
+ int opos; /* offset we started at */
+ int oline; /* original line number */
+ FILE *ffp;
+
+ if (replacebuf == TRUE)
+ x = undo_enable(FFRAND, 0);
+ else
+ x = undo_enabled();
+
+ lp1 = NULL;
+ if (line == NULL) {
+ line = malloc(NLINE);
+ if (line == NULL)
+ panic("out of memory");
+ linesize = NLINE;
+ }
+
+ /* cheap */
+ bp = curbp;
+ if (newname != NULL) {
+ (void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
+ (void)xdirname(bp->b_cwd, newname, sizeof(bp->b_cwd));
+ (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
+ }
+
+ /* hard file open */
+ if ((s = ffropen(&ffp, fname, (replacebuf == TRUE) ? bp : NULL))
+ == FIOERR)
+ goto out;
+ if (s == FIOFNF) {
+ /* file not found */
+ if (newname != NULL)
+ ewprintf("(New file)");
+ else
+ ewprintf("(File not found)");
+ goto out;
+ } else if (s == FIODIR) {
+ /* file was a directory */
+ if (replacebuf == FALSE) {
+ ewprintf("Cannot insert: file is a directory, %s",
+ fname);
+ goto cleanup;
+ }
+ killbuffer(bp);
+ bp = dired_(fname);
+ undo_enable(FFRAND, x);
+ if (bp == NULL)
+ return (FALSE);
+ curbp = bp;
+ return (showbuffer(bp, curwp, WFFULL | WFMODE));
+ } else {
+ (void)xdirname(bp->b_cwd, fname, sizeof(bp->b_cwd));
+ (void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
+ }
+ opos = curwp->w_doto;
+ oline = curwp->w_dotline;
+ /*
+ * Open a new line at dot and start inserting after it.
+ * We will delete this newline after insertion.
+ * Disable undo, as we create the undo record manually.
+ */
+ x2 = undo_enable(FFRAND, 0);
+ (void)lnewline();
+ olp = lback(curwp->w_dotp);
+ undo_enable(FFRAND, x2);
+
+ nline = 0;
+ siz = 0;
+ while ((s = ffgetline(ffp, line, linesize, &nbytes)) != FIOERR) {
+retry:
+ siz += nbytes + 1;
+ switch (s) {
+ case FIOSUC:
+ /* FALLTHRU */
+ case FIOEOF:
+ ++nline;
+ if ((lp1 = lalloc(nbytes)) == NULL) {
+ /* keep message on the display */
+ s = FIOERR;
+ undo_add_insert(olp, opos,
+ siz - nbytes - 1 - 1);
+ goto endoffile;
+ }
+ bcopy(line, <ext(lp1)[0], nbytes);
+ lp2 = lback(curwp->w_dotp);
+ lp2->l_fp = lp1;
+ lp1->l_fp = curwp->w_dotp;
+ lp1->l_bp = lp2;
+ curwp->w_dotp->l_bp = lp1;
+ if (s == FIOEOF) {
+ undo_add_insert(olp, opos, siz - 1);
+ goto endoffile;
+ }
+ break;
+ case FIOLONG: {
+ /* a line too long to fit in our buffer */
+ char *cp;
+ int newsize;
+
+ newsize = linesize * 2;
+ if (newsize < 0 ||
+ (cp = malloc(newsize)) == NULL) {
+ ewprintf("Could not allocate %d bytes",
+ newsize);
+ s = FIOERR;
+ goto endoffile;
+ }
+ bcopy(line, cp, linesize);
+ free(line);
+ line = cp;
+ s = ffgetline(ffp, line + linesize, linesize,
+ &nbytes);
+ nbytes += linesize;
+ linesize = newsize;
+ if (s == FIOERR)
+ goto endoffile;
+ goto retry;
+ }
+ default:
+ ewprintf("Unknown code %d reading file", s);
+ s = FIOERR;
+ break;
+ }
+ }
+endoffile:
+ /* ignore errors */
+ (void)ffclose(ffp, NULL);
+ /* don't zap an error */
+ if (s == FIOEOF) {
+ if (nline == 1)
+ ewprintf("(Read 1 line)");
+ else
+ ewprintf("(Read %d lines)", nline);
+ }
+ /* set mark at the end of the text */
+ curwp->w_dotp = curwp->w_markp = lback(curwp->w_dotp);
+ curwp->w_marko = llength(curwp->w_markp);
+ curwp->w_markline = oline + nline + 1;
+ /*
+ * if we are at the end of the file, ldelnewline is a no-op,
+ * but we still need to decrement the line and markline counts
+ * as we've accounted for this fencepost in our arithmetic
+ */
+ if (lforw(curwp->w_dotp) == curwp->w_bufp->b_headp) {
+ curwp->w_bufp->b_lines--;
+ curwp->w_markline--;
+ } else
+ (void)ldelnewline();
+ curwp->w_dotp = olp;
+ curwp->w_doto = opos;
+ curwp->w_dotline = oline;
+ if (olp == curbp->b_headp)
+ curwp->w_dotp = lforw(olp);
+ if (newname != NULL)
+ bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
+ else
+ bp->b_flag |= BFCHG;
+ /*
+ * If the insert was at the end of buffer, set lp1 to the end of
+ * buffer line, and lp2 to the beginning of the newly inserted text.
+ * (Otherwise lp2 is set to NULL.) This is used below to set
+ * pointers in other windows correctly if they are also at the end of
+ * buffer.
+ */
+ lp1 = bp->b_headp;
+ if (curwp->w_markp == lp1) {
+ lp2 = curwp->w_dotp;
+ } else {
+ /* delete extraneous newline */
+ (void)ldelnewline();
+out: lp2 = NULL;
+ }
+ for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
+ if (wp->w_bufp == curbp) {
+ wp->w_rflag |= WFMODE | WFEDIT;
+ if (wp != curwp && lp2 != NULL) {
+ if (wp->w_dotp == lp1)
+ wp->w_dotp = lp2;
+ if (wp->w_markp == lp1)
+ wp->w_markp = lp2;
+ if (wp->w_linep == lp1)
+ wp->w_linep = lp2;
+ }
+ }
+ }
+ bp->b_lines += nline;
+cleanup:
+ undo_enable(FFRAND, x);
+
+ /* return FALSE if error */
+ return (s != FIOERR);
+}
+
+/*
+ * Ask for a file name and write the contents of the current buffer to that
+ * file. Update the remembered file name and clear the buffer changed flag.
+ * This handling of file names is different from the earlier versions and
+ * is more compatible with Gosling EMACS than with ITS EMACS.
+ */
+/* ARGSUSED */
+int
+filewrite(int f, int n)
+{
+ struct stat statbuf;
+ int s;
+ char fname[NFILEN], bn[NBUFN], tmp[NFILEN + 25];
+ char *adjfname, *bufp;
+ FILE *ffp;
+
+ if (getbufcwd(fname, sizeof(fname)) != TRUE)
+ fname[0] = '\0';
+ if ((bufp = eread("Write file: ", fname, NFILEN,
+ EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
+ return (ABORT);
+ else if (bufp[0] == '\0')
+ return (FALSE);
+
+ adjfname = adjustname(fname, TRUE);
+ if (adjfname == NULL)
+ return (FALSE);
+
+ /* Check if file exists; write checks done later */
+ if (stat(adjfname, &statbuf) == 0) {
+ snprintf(tmp, sizeof(tmp), "File `%s' exists; overwrite",
+ adjfname);
+ if ((s = eyorn(tmp)) != TRUE)
+ return (s);
+ }
+
+ /* old attributes are no longer current */
+ bzero(&curbp->b_fi, sizeof(curbp->b_fi));
+ if ((s = writeout(&ffp, curbp, adjfname)) == TRUE) {
+ (void)strlcpy(curbp->b_fname, adjfname, sizeof(curbp->b_fname));
+ if (getbufcwd(curbp->b_cwd, sizeof(curbp->b_cwd)) != TRUE)
+ (void)strlcpy(curbp->b_cwd, "/", sizeof(curbp->b_cwd));
+ if (augbname(bn, curbp->b_fname, sizeof(bn))
+ == FALSE)
+ return (FALSE);
+ free(curbp->b_bname);
+ if ((curbp->b_bname = strdup(bn)) == NULL)
+ return (FALSE);
+ (void)fupdstat(curbp);
+ curbp->b_flag &= ~(BFBAK | BFCHG);
+ upmodes(curbp);
+ }
+ return (s);
+}
+
+/*
+ * Save the contents of the current buffer back into its associated file.
+ */
+#ifndef MAKEBACKUP
+#define MAKEBACKUP TRUE
+#endif /* !MAKEBACKUP */
+static int makebackup = MAKEBACKUP;
+
+/* ARGSUSED */
+int
+filesave(int f, int n)
+{
+ if (curbp->b_fname[0] == '\0')
+ return (filewrite(f, n));
+ else
+ return (buffsave(curbp));
+}
+
+/*
+ * Save the contents of the buffer argument into its associated file. Do
+ * nothing if there have been no changes (is this a bug, or a feature?).
+ * Error if there is no remembered file name. If this is the first write
+ * since the read or visit, then a backup copy of the file is made.
+ * Allow user to select whether or not to make backup files by looking at
+ * the value of makebackup.
+ */
+int
+buffsave(struct buffer *bp)
+{
+ int s;
+ FILE *ffp;
+
+ /* return, no changes */
+ if ((bp->b_flag & BFCHG) == 0) {
+ ewprintf("(No changes need to be saved)");
+ return (TRUE);
+ }
+
+ /* must have a name */
+ if (bp->b_fname[0] == '\0') {
+ ewprintf("No file name");
+ return (FALSE);
+ }
+
+ /* Ensure file has not been modified elsewhere */
+ /* We don't use the ignore flag here */
+ if (fchecktime(bp) != TRUE) {
+ if ((s = eyesno("File has changed on disk since last save. "
+ "Save anyway")) != TRUE)
+ return (s);
+ }
+
+ if (makebackup && (bp->b_flag & BFBAK)) {
+ s = fbackupfile(bp->b_fname);
+ /* hard error */
+ if (s == ABORT)
+ return (FALSE);
+ /* softer error */
+ if (s == FALSE &&
+ (s = eyesno("Backup error, save anyway")) != TRUE)
+ return (s);
+ }
+ if ((s = writeout(&ffp, bp, bp->b_fname)) == TRUE) {
+ (void)fupdstat(bp);
+ bp->b_flag &= ~(BFCHG | BFBAK);
+ upmodes(bp);
+ }
+ return (s);
+}
+
+/*
+ * Since we don't have variables (we probably should) this is a command
+ * processor for changing the value of the make backup flag. If no argument
+ * is given, sets makebackup to true, so backups are made. If an argument is
+ * given, no backup files are made when saving a new version of a file.
+ */
+/* ARGSUSED */
+int
+makebkfile(int f, int n)
+{
+ if (f & FFARG)
+ makebackup = n > 0;
+ else
+ makebackup = !makebackup;
+ ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
+ return (TRUE);
+}
+
+/*
+ * NB: bp is passed to both ffwopen and ffclose because some
+ * attribute information may need to be updated at open time
+ * and others after the close. This is OS-dependent. Note
+ * that the ff routines are assumed to be able to tell whether
+ * the attribute information has been set up in this buffer
+ * or not.
+ */
+
+/*
+ * This function performs the details of file writing; writing the file
+ * in buffer bp to file fn. Uses the file management routines in the
+ * "fileio.c" package. Most of the grief is checking of some sort.
+ * You may want to call fupdstat() after using this function.
+ */
+int
+writeout(FILE ** ffp, struct buffer *bp, char *fn)
+{
+ int s;
+
+ /* open writes message */
+ if ((s = ffwopen(ffp, fn, bp)) != FIOSUC)
+ return (FALSE);
+ s = ffputbuf(*ffp, bp);
+ if (s == FIOSUC) {
+ /* no write error */
+ s = ffclose(*ffp, bp);
+ if (s == FIOSUC)
+ ewprintf("Wrote %s", fn);
+ } else {
+ /* print a message indicating write error */
+ (void)ffclose(*ffp, bp);
+ ewprintf("Unable to write %s", fn);
+ }
+ return (s == FIOSUC);
+}
+
+/*
+ * Tag all windows for bp (all windows if bp == NULL) as needing their
+ * mode line updated.
+ */
+void
+upmodes(struct buffer *bp)
+{
+ struct mgwin *wp;
+
+ for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
+ if (bp == NULL || curwp->w_bufp == bp)
+ wp->w_rflag |= WFMODE;
+}
+
+/*
+ * dirname using strlcpy semantic.
+ * Like dirname() except an empty string is returned in
+ * place of "/". This means we can always add a trailing
+ * slash and be correct.
+ * Address portability issues by copying argument
+ * before using. Some implementations modify the input string.
+ */
+size_t
+xdirname(char *dp, const char *path, size_t dplen)
+{
+ char ts[NFILEN];
+ size_t len;
+
+ (void)strlcpy(ts, path, NFILEN);
+ len = strlcpy(dp, dirname(ts), dplen);
+ if (dplen > 0 && dp[0] == '/' && dp[1] == '\0') {
+ dp[0] = '\0';
+ len = 0;
+ }
+ return (len);
+}
+
+/*
+ * basename using strlcpy/strlcat semantic.
+ * Address portability issue by copying argument
+ * before using: some implementations modify the input string.
+ */
+size_t
+xbasename(char *bp, const char *path, size_t bplen)
+{
+ char ts[NFILEN];
+
+ (void)strlcpy(ts, path, NFILEN);
+ return (strlcpy(bp, basename(ts), bplen));
+}
projects / pd_readline / blobdiff