772 lines
19 KiB
C
772 lines
19 KiB
C
/* $OpenBSD: file.c,v 1.104 2024/04/23 13:34:50 jsg Exp $ */
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/* This file is in the public domain. */
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/*
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* File commands.
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*/
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <libgen.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "def.h"
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size_t xdirname(char *, const char *, size_t);
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/*
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* Insert a file into the current buffer. Real easy - just call the
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* insertfile routine with the file name.
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*/
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int
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fileinsert(int f, int n)
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{
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char fname[NFILEN], *bufp, *adjf;
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if (getbufcwd(fname, sizeof(fname)) != TRUE)
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fname[0] = '\0';
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bufp = eread("Insert file: ", fname, NFILEN,
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EFNEW | EFCR | EFFILE | EFDEF);
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if (bufp == NULL)
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return (ABORT);
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else if (bufp[0] == '\0')
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return (FALSE);
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adjf = adjustname(bufp, TRUE);
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if (adjf == NULL)
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return (FALSE);
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return (insertfile(adjf, NULL, FALSE));
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}
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/*
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* Select a file for editing. If the file is a directory, invoke dired.
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* Otherwise, look around to see if you can find the file in another buffer;
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* if you can find it, just switch to the buffer. If you cannot find the
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* file, create a new buffer, read in the text, and switch to the new buffer.
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*/
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int
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filevisit(int f, int n)
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{
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struct buffer *bp;
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char fname[NFILEN], *bufp, *adjf;
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int status;
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if (getbufcwd(fname, sizeof(fname)) != TRUE)
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fname[0] = '\0';
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bufp = eread("Find file: ", fname, NFILEN,
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EFNEW | EFCR | EFFILE | EFDEF);
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if (bufp == NULL)
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return (ABORT);
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else if (bufp[0] == '\0')
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return (FALSE);
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adjf = adjustname(fname, TRUE);
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if (adjf == NULL)
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return (FALSE);
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if (fisdir(adjf) == TRUE)
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return (do_dired(adjf));
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if ((bp = findbuffer(adjf)) == NULL)
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return (FALSE);
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curbp = bp;
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if (showbuffer(bp, curwp, WFFULL) != TRUE)
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return (FALSE);
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if (bp->b_fname[0] == '\0') {
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if ((status = readin(adjf)) != TRUE)
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killbuffer(bp);
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return (status);
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}
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return (TRUE);
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}
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/*
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* Replace the current file with an alternate one. Semantics for finding
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* the replacement file are the same as 'filevisit', except the current
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* buffer is killed before the switch. If the kill fails, or is aborted,
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* revert to the original file.
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*/
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int
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filevisitalt(int f, int n)
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{
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char fname[NFILEN], *bufp;
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if (getbufcwd(fname, sizeof(fname)) != TRUE)
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fname[0] = '\0';
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bufp = eread("Find alternate file: ", fname, NFILEN,
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EFNEW | EFCR | EFFILE | EFDEF);
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if (bufp == NULL)
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return (ABORT);
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else if (bufp[0] == '\0')
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return (FALSE);
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return (do_filevisitalt(fname));
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}
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int
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do_filevisitalt(char *fn)
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{
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struct buffer *bp;
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int status;
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char *adjf;
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status = killbuffer(curbp);
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if (status == ABORT || status == FALSE)
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return (ABORT);
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adjf = adjustname(fn, TRUE);
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if (adjf == NULL)
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return (FALSE);
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if (fisdir(adjf) == TRUE)
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return (do_dired(adjf));
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if ((bp = findbuffer(adjf)) == NULL)
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return (FALSE);
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curbp = bp;
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if (showbuffer(bp, curwp, WFFULL) != TRUE)
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return (FALSE);
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if (bp->b_fname[0] == '\0') {
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if ((status = readin(adjf)) != TRUE)
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killbuffer(bp);
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return (status);
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}
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return (TRUE);
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}
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int
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filevisitro(int f, int n)
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{
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int error;
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error = filevisit(f, n);
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if (error != TRUE)
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return (error);
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curbp->b_flag |= BFREADONLY;
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return (TRUE);
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}
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/*
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* Pop to a file in the other window. Same as the last function, but uses
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* popbuf instead of showbuffer.
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*/
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int
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poptofile(int f, int n)
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{
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struct buffer *bp;
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struct mgwin *wp;
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char fname[NFILEN], *adjf, *bufp;
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int status;
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if (getbufcwd(fname, sizeof(fname)) != TRUE)
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fname[0] = '\0';
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if ((bufp = eread("Find file in other window: ", fname, NFILEN,
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EFNEW | EFCR | EFFILE | EFDEF)) == NULL)
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return (ABORT);
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else if (bufp[0] == '\0')
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return (FALSE);
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adjf = adjustname(fname, TRUE);
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if (adjf == NULL)
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return (FALSE);
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if (fisdir(adjf) == TRUE)
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return (do_dired(adjf));
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if ((bp = findbuffer(adjf)) == NULL)
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return (FALSE);
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if (bp == curbp)
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return (splitwind(f, n));
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if ((wp = popbuf(bp, WNONE)) == NULL)
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return (FALSE);
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curbp = bp;
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curwp = wp;
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if (bp->b_fname[0] == '\0') {
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if ((status = readin(adjf)) != TRUE)
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killbuffer(bp);
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return (status);
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}
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return (TRUE);
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}
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/*
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* Read the file "fname" into the current buffer. Make all of the text
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* in the buffer go away, after checking for unsaved changes. This is
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* called by the "read" command, the "visit" command, and the mainline
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* (for "mg file").
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*/
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int
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readin(char *fname)
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{
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struct mgwin *wp;
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struct stat statbuf;
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int status, i, ro = FALSE;
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PF *ael;
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char dp[NFILEN];
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/* might be old */
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if (bclear(curbp) != TRUE)
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return (TRUE);
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/* Clear readonly. May be set by autoexec path */
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curbp->b_flag &= ~BFREADONLY;
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if ((status = insertfile(fname, fname, TRUE)) != TRUE) {
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dobeep();
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ewprintf("File is not readable: %s", fname);
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return (FALSE);
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}
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for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
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if (wp->w_bufp == curbp) {
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wp->w_dotp = wp->w_linep = bfirstlp(curbp);
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wp->w_doto = 0;
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wp->w_markp = NULL;
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wp->w_marko = 0;
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}
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}
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/*
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* Call auto-executing function if we need to.
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*/
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if ((ael = find_autoexec(fname)) != NULL) {
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for (i = 0; ael[i] != NULL; i++)
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(*ael[i])(0, 1);
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free(ael);
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}
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/* no change */
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curbp->b_flag &= ~BFCHG;
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/*
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* Set the buffer READONLY flag if any of following are true:
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* 1. file is a directory.
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* 2. file is read-only.
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* 3. file doesn't exist and directory is read-only.
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*/
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if (fisdir(fname) == TRUE) {
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ro = TRUE;
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} else if ((access(fname, W_OK) == -1)) {
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if (errno != ENOENT) {
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ro = TRUE;
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} else if (errno == ENOENT) {
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(void)xdirname(dp, fname, sizeof(dp));
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(void)strlcat(dp, "/", sizeof(dp));
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/* Missing directory; keep buffer rw, like emacs */
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if (stat(dp, &statbuf) == -1 && errno == ENOENT) {
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if (eyorn("Missing directory, create") == TRUE)
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(void)do_makedir(dp);
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} else if (access(dp, W_OK) == -1 && errno == EACCES) {
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ewprintf("File not found and directory"
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" write-protected");
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ro = TRUE;
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}
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}
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}
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if (ro == TRUE)
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curbp->b_flag |= BFREADONLY;
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if (startrow) {
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gotoline(FFARG, startrow);
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startrow = 0;
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}
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undo_add_modified();
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return (status);
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}
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/*
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* NB, getting file attributes is done here under control of a flag
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* rather than in readin, which would be cleaner. I was concerned
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* that some operating system might require the file to be open
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* in order to get the information. Similarly for writing.
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*/
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/*
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* Insert a file in the current buffer, after dot. If file is a directory,
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* and 'replacebuf' is TRUE, invoke dired mode, else die with an error.
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* If file is a regular file, set mark at the end of the text inserted;
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* point at the beginning. Return a standard status. Print a summary
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* (lines read, error message) out as well. This routine also does the
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* read end of backup processing. The BFBAK flag, if set in a buffer,
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* says that a backup should be taken. It is set when a file is read in,
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* but not on a new file. You don't need to make a backup copy of nothing.
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*/
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static char *line = NULL;
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static int linesize = 0;
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int
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insertfile(char *fname, char *newname, int replacebuf)
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{
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struct buffer *bp;
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struct line *lp1, *lp2;
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struct line *olp; /* line we started at */
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struct mgwin *wp;
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int nbytes, s, nline = 0, siz, x, x2;
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int opos; /* offset we started at */
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int oline; /* original line number */
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FILE *ffp;
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if (replacebuf == TRUE)
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x = undo_enable(FFRAND, 0);
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else
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x = undo_enabled();
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lp1 = NULL;
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if (line == NULL) {
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line = malloc(NLINE);
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if (line == NULL)
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panic("out of memory");
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linesize = NLINE;
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}
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/* cheap */
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bp = curbp;
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if (newname != NULL) {
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(void)strlcpy(bp->b_fname, newname, sizeof(bp->b_fname));
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(void)xdirname(bp->b_cwd, newname, sizeof(bp->b_cwd));
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(void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
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}
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/* hard file open */
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if ((s = ffropen(&ffp, fname, (replacebuf == TRUE) ? bp : NULL))
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== FIOERR)
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goto out;
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if (s == FIOFNF) {
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/* file not found */
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if (newname != NULL)
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ewprintf("(New file)");
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else
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ewprintf("(File not found)");
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goto out;
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} else if (s == FIODIR) {
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/* file was a directory */
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if (replacebuf == FALSE) {
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dobeep();
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ewprintf("Cannot insert: file is a directory, %s",
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fname);
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goto cleanup;
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}
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killbuffer(bp);
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bp = dired_(fname);
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undo_enable(FFRAND, x);
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if (bp == NULL)
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return (FALSE);
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curbp = bp;
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return (showbuffer(bp, curwp, WFFULL | WFMODE));
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} else {
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(void)xdirname(bp->b_cwd, fname, sizeof(bp->b_cwd));
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(void)strlcat(bp->b_cwd, "/", sizeof(bp->b_cwd));
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}
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opos = curwp->w_doto;
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oline = curwp->w_dotline;
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/*
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* Open a new line at dot and start inserting after it.
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* We will delete this newline after insertion.
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* Disable undo, as we create the undo record manually.
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*/
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x2 = undo_enable(FFRAND, 0);
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(void)lnewline();
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olp = lback(curwp->w_dotp);
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undo_enable(FFRAND, x2);
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nline = 0;
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siz = 0;
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while ((s = ffgetline(ffp, line, linesize, &nbytes)) != FIOERR) {
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retry:
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siz += nbytes + 1;
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switch (s) {
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case FIOSUC:
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/* FALLTHRU */
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case FIOEOF:
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++nline;
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if ((lp1 = lalloc(nbytes)) == NULL) {
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/* keep message on the display */
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s = FIOERR;
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undo_add_insert(olp, opos,
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siz - nbytes - 1 - 1);
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goto endoffile;
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}
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bcopy(line, <ext(lp1)[0], nbytes);
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lp2 = lback(curwp->w_dotp);
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lp2->l_fp = lp1;
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lp1->l_fp = curwp->w_dotp;
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lp1->l_bp = lp2;
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curwp->w_dotp->l_bp = lp1;
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if (s == FIOEOF) {
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undo_add_insert(olp, opos, siz - 1);
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goto endoffile;
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}
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break;
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case FIOLONG: {
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/* a line too long to fit in our buffer */
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char *cp;
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int newsize;
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newsize = linesize * 2;
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if (newsize < 0 ||
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(cp = malloc(newsize)) == NULL) {
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dobeep();
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ewprintf("Could not allocate %d bytes",
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newsize);
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s = FIOERR;
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goto endoffile;
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}
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bcopy(line, cp, linesize);
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free(line);
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line = cp;
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s = ffgetline(ffp, line + linesize, linesize,
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&nbytes);
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nbytes += linesize;
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linesize = newsize;
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if (s == FIOERR)
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goto endoffile;
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goto retry;
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}
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default:
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dobeep();
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ewprintf("Unknown code %d reading file", s);
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s = FIOERR;
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break;
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}
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}
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endoffile:
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/* ignore errors */
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(void)ffclose(ffp, NULL);
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/* don't zap an error */
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if (s == FIOEOF) {
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if (nline == 1)
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ewprintf("(Read 1 line)");
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else
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ewprintf("(Read %d lines)", nline);
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}
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/* set mark at the end of the text */
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curwp->w_dotp = curwp->w_markp = lback(curwp->w_dotp);
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curwp->w_marko = llength(curwp->w_markp);
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curwp->w_markline = oline + nline + 1;
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/*
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* if we are at the end of the file, ldelnewline is a no-op,
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* but we still need to decrement the line and markline counts
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* as we've accounted for this fencepost in our arithmetic
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*/
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if (lforw(curwp->w_dotp) == curwp->w_bufp->b_headp) {
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curwp->w_bufp->b_lines--;
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curwp->w_markline--;
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} else
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(void)ldelnewline();
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curwp->w_dotp = olp;
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curwp->w_doto = opos;
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curwp->w_dotline = oline;
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if (olp == curbp->b_headp)
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curwp->w_dotp = lforw(olp);
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if (newname != NULL)
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bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
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else
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bp->b_flag |= BFCHG;
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/*
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* If the insert was at the end of buffer, set lp1 to the end of
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* buffer line, and lp2 to the beginning of the newly inserted text.
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* (Otherwise lp2 is set to NULL.) This is used below to set
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* pointers in other windows correctly if they are also at the end of
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* buffer.
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*/
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lp1 = bp->b_headp;
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if (curwp->w_markp == lp1) {
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lp2 = curwp->w_dotp;
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} else {
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/* delete extraneous newline */
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(void)ldelnewline();
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out: lp2 = NULL;
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}
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for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
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if (wp->w_bufp == curbp) {
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wp->w_rflag |= WFMODE | WFEDIT;
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if (wp != curwp && lp2 != NULL) {
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if (wp->w_dotp == lp1)
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wp->w_dotp = lp2;
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if (wp->w_markp == lp1)
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wp->w_markp = lp2;
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if (wp->w_linep == lp1)
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wp->w_linep = lp2;
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}
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}
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}
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bp->b_lines += nline;
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cleanup:
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undo_enable(FFRAND, x);
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/* return FALSE if error */
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return (s != FIOERR);
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}
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/*
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* Ask for a file name and write the contents of the current buffer to that
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* file. Update the remembered file name and clear the buffer changed flag.
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* This handling of file names is different from the earlier versions and
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* is more compatible with Gosling EMACS than with ITS EMACS.
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*/
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int
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filewrite(int f, int n)
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{
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struct stat statbuf;
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int s;
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char fname[NFILEN], bn[NBUFN], tmp[NFILEN + 25];
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char *adjfname, *bufp;
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FILE *ffp;
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if (getbufcwd(fname, sizeof(fname)) != TRUE)
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fname[0] = '\0';
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if ((bufp = eread("Write file: ", fname, NFILEN,
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EFDEF | EFNEW | EFCR | EFFILE)) == NULL)
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return (ABORT);
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else if (bufp[0] == '\0')
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return (FALSE);
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|
|
adjfname = adjustname(fname, TRUE);
|
|
if (adjfname == NULL)
|
|
return (FALSE);
|
|
|
|
/* Check if file exists; write checks done later */
|
|
if (stat(adjfname, &statbuf) == 0) {
|
|
if (S_ISDIR(statbuf.st_mode)) {
|
|
dobeep();
|
|
ewprintf("%s is a directory", adjfname);
|
|
return (FALSE);
|
|
}
|
|
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);
|
|
undo_add_boundary(FFRAND, 1);
|
|
undo_add_modified();
|
|
}
|
|
return (s);
|
|
}
|
|
|
|
/*
|
|
* Save the contents of the current buffer back into its associated file.
|
|
*/
|
|
static int makebackup = TRUE;
|
|
|
|
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') {
|
|
dobeep();
|
|
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);
|
|
undo_add_boundary(FFRAND, 1);
|
|
undo_add_modified();
|
|
}
|
|
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.
|
|
*/
|
|
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)
|
|
{
|
|
struct stat statbuf;
|
|
struct line *lpend;
|
|
int s, eobnl;
|
|
char dp[NFILEN];
|
|
|
|
if (stat(fn, &statbuf) == -1 && errno == ENOENT) {
|
|
errno = 0;
|
|
(void)xdirname(dp, fn, sizeof(dp));
|
|
(void)strlcat(dp, "/", sizeof(dp));
|
|
if (access(dp, W_OK) && errno == EACCES) {
|
|
dobeep();
|
|
ewprintf("Directory %s write-protected", dp);
|
|
return (FIOERR);
|
|
} else if (errno == ENOENT) {
|
|
dobeep();
|
|
ewprintf("%s: no such directory", dp);
|
|
return (FIOERR);
|
|
}
|
|
}
|
|
lpend = bp->b_headp;
|
|
eobnl = 0;
|
|
if (llength(lback(lpend)) != 0) {
|
|
eobnl = eyorn("No newline at end of file, add one");
|
|
if (eobnl != TRUE && eobnl != FALSE)
|
|
return (eobnl); /* abort */
|
|
}
|
|
/* open writes message */
|
|
if ((s = ffwopen(ffp, fn, bp)) != FIOSUC)
|
|
return (FALSE);
|
|
s = ffputbuf(*ffp, bp, eobnl);
|
|
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);
|
|
dobeep();
|
|
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));
|
|
}
|
|
|
|
/*
|
|
* The adjusted file name refers to a directory, so open dired mode.
|
|
*/
|
|
int
|
|
do_dired(char *adjf)
|
|
{
|
|
struct buffer *bp;
|
|
|
|
if ((bp = dired_(adjf)) == FALSE)
|
|
return (FALSE);
|
|
curbp = bp;
|
|
return (showbuffer(bp, curwp, WFFULL | WFMODE));
|
|
}
|