mirror of https://github.com/tildeclub/ex-vi.git
556 lines
14 KiB
C
556 lines
14 KiB
C
/*
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* This code contains changes by
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* Gunnar Ritter, Freiburg i. Br., Germany, 2002. All rights reserved.
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*
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* Conditions 1, 2, and 4 and the no-warranty notice below apply
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* to these changes.
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*
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*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*
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* Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* Redistributions of source code and documentation must retain the
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* above copyright notice, this list of conditions and the following
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* disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed or owned by Caldera
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* International, Inc.
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* Neither the name of Caldera International, Inc. nor the names of
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* other contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
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* INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef __GNUC__
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#define UNUSED __attribute__ ((unused))
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#else
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#define UNUSED
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#endif
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#ifndef lint
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#ifdef DOSCCS
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char *copyright =
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"@(#) Copyright (c) 1980 Regents of the University of California.\n\
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All rights reserved.\n";
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#endif
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static char sccsid[] UNUSED = "@(#)expreserve.c 1.23 (gritter) 11/27/04";
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#endif
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/* from expreserve.c 7.13.2 (2.11BSD GTE) 1996/10/26 */
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#include <stdio.h>
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#include <ctype.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/utsname.h>
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#include <dirent.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <pwd.h>
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#include <time.h>
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#include "config.h"
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#ifdef LANGMSG
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#include <nl_types.h>
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#include <locale.h>
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nl_catd catd;
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#else
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#define catgets(a, b, c, d) (d)
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#endif
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#ifdef BUFSIZ
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#undef BUFSIZ
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#endif
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#ifdef LINE_MAX
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#define BUFSIZ LINE_MAX /* POSIX line size */
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#else /* !LINE_MAX */
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#ifdef VMUNIX
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#define BUFSIZ 1024
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#else /* !VMUNIX */
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#ifdef u370
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#define BUFSIZ 4096
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#else /* !u370 */
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#define BUFSIZ 512
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#endif /* !u370 */
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#endif
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#endif /* !VMUNIX */
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#ifdef LARGEF
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typedef off_t bloc;
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#else
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typedef short bloc;
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#endif
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#ifdef VMUNIX
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#ifdef LARGEF
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typedef off_t bbloc;
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#else
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typedef int bbloc;
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#endif
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#else
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typedef short bbloc;
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#endif
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#ifdef notdef
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#define TMP "/tmp"
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#else
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#define TMP "/var/tmp"
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#endif
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#ifndef VMUNIX
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#define LBLKS 125
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#else
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#ifdef LARGEF
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#define LBLKS 20000
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#else
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#define LBLKS 900
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#endif
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#endif
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#ifdef _POSIX_PATH_MAX
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#define FNSIZE _POSIX_PATH_MAX
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#else
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#define FNSIZE 128
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#endif
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#ifdef VMUNIX
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#define HBLKS (1 + (FNSIZE + LBLKS * sizeof(bloc)) / BUFSIZ)
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#else
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#define HBLKS 1
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#endif
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char xstr[1]; /* make loader happy */
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extern void notify(uid_t, char *, int, time_t);
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extern int copyout(char *);
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extern void mkdigits(char *);
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extern void mknext(char *);
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/*
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* Expreserve - preserve a file in /usr/preserve
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* Bill Joy UCB November 13, 1977
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*
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* This routine is very naive - it doesn't remove anything from
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* /usr/preserve... this may mean that we leave
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* stuff there... the danger in doing anything with /usr/preserve
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* is that the clock may be screwed up and we may get confused.
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*
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* We are called in two ways - first from the editor with no argumentss
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* and the standard input open on the temp file. Second with an argument
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* to preserve the entire contents of /tmp (root only).
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*
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* BUG: should do something about preserving Rx... (register contents)
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* temporaries.
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*/
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struct header {
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time_t Time; /* Time temp file last updated */
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uid_t Uid;
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bbloc Flines; /* Number of lines in file */
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char Savedfile[FNSIZE]; /* The current file name */
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bloc Blocks[LBLKS]; /* Blocks where line pointers stashed */
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} H;
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#define ignore(a) a
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#define ignorl(a) a
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#define eq(a, b) (strcmp(a, b) == 0)
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int
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main(int argc, char **argv)
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{
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register DIR *tf;
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struct dirent *dirent;
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struct stat stbuf;
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#ifdef LANGMSG
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setlocale(LC_MESSAGES, "");
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catd = catopen(CATNAME, NL_CAT_LOCALE);
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#endif
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/*
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* If only one argument, then preserve the standard input.
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*/
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if (argc == 1) {
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if (copyout((char *) 0))
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exit(1);
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exit(0);
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}
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/*
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* If not super user, then can only preserve standard input.
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*/
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if (getuid()) {
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fprintf(stderr, catgets(catd, 3, 1, "NOT super user\n"));
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exit(1);
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}
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/*
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* ... else preserve all the stuff in /tmp, removing
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* it as we go.
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*/
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if (chdir(TMP) < 0) {
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perror(TMP);
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exit(1);
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}
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tf = opendir(".");
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if (tf == NULL) {
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perror(TMP);
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exit(1);
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}
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while ((dirent = readdir(tf)) != NULL) {
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/* Ex temporaries must begin with Ex. */
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if (dirent->d_name[0] != 'E' || dirent->d_name[1] != 'x')
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continue;
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if (stat(dirent->d_name, &stbuf))
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continue;
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if ((stbuf.st_mode & S_IFMT) != S_IFREG)
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continue;
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/*
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* Save the bastard.
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*/
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ignore(copyout(dirent->d_name));
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}
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closedir(tf);
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return 0;
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}
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#ifdef notdef
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char pattern[] = "/usr/archaic/preserve/Exaa`XXXXX";
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#else
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char pattern[] = "/var/archaic/preserve/Exa`XXXXXXXXXX";
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#endif
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/*
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* Notify user uid that his file fname has been saved.
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*/
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void
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notify(uid_t uid, char *fname, int flag, time_t time)
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{
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struct passwd *pp = getpwuid(uid);
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register FILE *mf;
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char cmd[BUFSIZ];
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struct utsname ut;
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char *hostname;
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char croak[128];
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char *timestamp;
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if (pp == NULL)
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return;
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uname(&ut);
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hostname = ut.nodename;
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timestamp = ctime(&time);
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timestamp[16] = 0; /* blast from seconds on */
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putenv("MAILRC=/dev/null");
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sprintf(cmd, "/bin/mail %s", pp->pw_name);
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setuid(getuid());
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mf = popen(cmd, "w");
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if (mf == NULL)
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return;
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setbuf(mf, cmd);
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/*
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* flag says how the editor croaked:
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* "the editor was killed" is perhaps still not an ideal
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* error message. Usually, either it was forcably terminated
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* or the phone was hung up, but we don't know which.
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*/
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sprintf(croak, flag
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? catgets(catd, 3, 2, "the system went down")
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: catgets(catd, 3, 3, "the editor was killed"));
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if (fname[0] == 0) {
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fname = "LOST";
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fprintf(mf, catgets(catd, 3, 4,
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"Subject: editor saved ``LOST''\n"));
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fprintf(mf, catgets(catd, 3, 5,
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"You were editing a file without a name\n"));
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fprintf(mf, catgets(catd, 3, 6,
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"at <%s> on the machine ``%s'' when %s.\n"),
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timestamp, hostname, croak);
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fprintf(mf, catgets(catd, 3, 7,
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"Since the file had no name, it has been named \"LOST\".\n"));
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} else {
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fprintf(mf, catgets(catd, 3, 8,
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"Subject: editor saved ``%s''\n"), fname);
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fprintf(mf, catgets(catd, 3, 9,
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"You were editing the file \"%s\"\n"), fname);
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fprintf(mf, catgets(catd, 3, 10,
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"at <%s> on the machine ``%s''\n"),
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timestamp, hostname);
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fprintf(mf, catgets(catd, 3, 11, "when %s.\n"), croak);
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}
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fprintf(mf, catgets(catd, 3, 12,
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"\nYou can retrieve most of your changes to this file\n"));
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fprintf(mf, catgets(catd, 3, 13,
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"using the \"recover\" command of the editor.\n"));
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fprintf(mf, catgets(catd, 3, 14,
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"An easy way to do this is to give the command \"vi -r %s\".\n"), fname);
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fprintf(mf, catgets(catd, 3, 15,
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"This method also works using \"ex\" and \"edit\".\n"));
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pclose(mf);
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}
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/*
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* Copy file name into /usr/preserve/...
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* If name is (char *) 0, then do the standard input.
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* We make some checks on the input to make sure it is
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* really an editor temporary, generate a name for the
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* file (this is the slowest thing since we must stat
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* to find a unique name), and finally copy the file.
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*/
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int
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copyout(char *name)
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{
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int i;
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char buf[BUFSIZ];
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static int reenter;
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/*
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* The first time we put in the digits of our
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* process number at the end of the pattern.
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*/
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if (reenter == 0) {
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mkdigits(pattern);
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reenter++;
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}
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/*
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* If a file name was given, make it the standard
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* input if possible.
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*/
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if (name != 0) {
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ignore(close(0));
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/*
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* Need read/write access for arcane reasons
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* (see below).
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*/
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if (open(name, O_RDWR) < 0)
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return (-1);
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}
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/*
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* Get the header block.
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*/
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ignorl(lseek(0, (off_t) 0, SEEK_SET));
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if (read(0, (char *) &H, sizeof H) != sizeof H) {
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format:
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if (name == 0)
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fprintf(stderr, catgets(catd, 3, 16,
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"Buffer format error\t"));
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return (-1);
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}
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/*
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* Consistency checsks so we don't copy out garbage.
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*/
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if (H.Flines < 0) {
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#ifdef DEBUG
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fprintf(stderr, "Negative number of lines\n");
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#endif
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goto format;
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}
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if (H.Blocks[0] != HBLKS || H.Blocks[1] != HBLKS+1) {
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#ifdef DEBUG
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fprintf(stderr, "Blocks %d %d\n", H.Blocks[0], H.Blocks[1]);
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#endif
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goto format;
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}
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if (name == 0 && H.Uid != getuid()) {
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#ifdef DEBUG
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fprintf(stderr, "Wrong user-id\n");
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#endif
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goto format;
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}
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if (lseek(0, (off_t) 0, SEEK_SET)) {
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#ifdef DEBUG
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fprintf(stderr, "Negative number of lines\n");
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#endif
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goto format;
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}
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/*
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* If no name was assigned to the file, then give it the name
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* LOST, by putting this in the header.
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*/
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if (H.Savedfile[0] == 0) {
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strcpy(H.Savedfile, "LOST");
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ignore(write(0, (char *) &H, sizeof H));
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H.Savedfile[0] = 0;
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lseek(0, (off_t) 0, SEEK_SET);
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}
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/*
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* File is good. Get a name and create a file for the copy.
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*/
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mknext(pattern);
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ignore(close(1));
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if (open(pattern, O_CREAT|O_EXCL|O_WRONLY|O_TRUNC
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#ifdef O_NOFOLLOW
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|O_NOFOLLOW
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#endif /* O_NOFOLLOW */
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, 0600) < 0) {
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if (name == 0)
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perror(pattern);
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return (1);
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}
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/*
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* Make the target be owned by the owner of the file.
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*/
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ignore(chown(pattern, H.Uid, 0));
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/*
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* Copy the file.
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*/
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for (;;) {
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i = read(0, buf, BUFSIZ);
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if (i < 0) {
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if (name)
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perror(catgets(catd, 3, 17,
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"Buffer read error"));
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ignore(unlink(pattern));
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return (-1);
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}
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if (i == 0) {
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if (name)
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ignore(unlink(name));
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notify(H.Uid, H.Savedfile, name != 0, H.Time);
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return (0);
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}
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if (write(1, buf, i) != i) {
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if (name == 0)
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perror(pattern);
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unlink(pattern);
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return (-1);
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}
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}
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}
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/*
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* Blast the last 5 characters of cp to be the process number.
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*/
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void
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mkdigits(char *cp)
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{
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register pid_t i;
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register int j;
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#ifdef notdef
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for (i = getpid(), j = 5, cp += strlen(cp); j > 0; i /= 10, j--)
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*--cp = i % 10 | '0';
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#else
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for (i = getpid(), j = 10, cp += strlen(cp); j > 0; i /= 10, j--)
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*--cp = i % 10 | '0';
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#endif
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}
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/*
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* Make the name in cp be unique by clobbering up to
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* three alphabetic characters into a sequence of the form 'aab', 'aac', etc.
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* Mktemp gets weird names too quickly to be useful here.
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*/
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void
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mknext(char *cp)
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{
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char *dcp;
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struct stat stb;
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dcp = cp + strlen(cp) - 1;
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while (isdigit(*dcp & 0377))
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dcp--;
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whoops:
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if (dcp[0] == 'z') {
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dcp[0] = 'a';
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if (dcp[-1] == 'z') {
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#ifdef notdef
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dcp[-1] = 'a';
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if (dcp[-2] == 'z')
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#endif
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fprintf(stderr, catgets(catd, 3, 18,
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"Can't find a name\t"));
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#ifdef notdef
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dcp[-2]++;
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#endif
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} else
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dcp[-1]++;
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} else
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dcp[0]++;
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if (stat(cp, &stb) == 0)
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goto whoops;
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}
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/*
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* people making love
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|
* never exactly the same
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|
* just like a snowflake
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|
*/
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|
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#ifdef lint
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|
void
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|
Ignore(int a)
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|
{
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|
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|
a = a;
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|
}
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|
|
|
void
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|
Ignorl(long a)
|
|
{
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|
|
|
a = a;
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|
}
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|
#endif
|