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/*
* This code contains changes by
* Gunnar Ritter, Freiburg i. Br., Germany, 2002. All rights reserved.
*
* Conditions 1, 2, and 4 and the no-warranty notice below apply
* to these changes.
*
*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* Redistributions of source code and documentation must retain the
* above copyright notice, this list of conditions and the following
* disclaimer.
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed or owned by Caldera
* International, Inc.
* Neither the name of Caldera International, Inc. nor the names of
* other contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
* INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE
* LIABLE FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef lint
#ifdef DOSCCS
char *copyright =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
static char sccsid[] = "@(#)ex.c 1.36 (gritter) 2/13/05";
#endif /* DOSCCS */
#endif /* !lint */
/* from ex.c 7.5.1.1 (Berkeley) 8/12/86 */
#include "ex.h"
#include "ex_argv.h"
#include "ex_temp.h"
#include "ex_tty.h"
#ifdef TRACE
char tttrace[] = { '/','d','e','v','/','t','t','y','x','x',0 };
#endif
/*
* The code for ex is divided as follows:
*
* ex.c Entry point and routines handling interrupt, hangup
* signals; initialization code.
*
* ex_addr.c Address parsing routines for command mode decoding.
* Routines to set and check address ranges on commands.
*
* ex_cmds.c Command mode command decoding.
*
* ex_cmds2.c Subroutines for command decoding and processing of
* file names in the argument list. Routines to print
* messages and reset state when errors occur.
*
* ex_cmdsub.c Subroutines which implement command mode functions
* such as append, delete, join.
*
* ex_data.c Initialization of options.
*
* ex_get.c Command mode input routines.
*
* ex_io.c General input/output processing: file i/o, unix
* escapes, filtering, source commands, preserving
* and recovering.
*
* ex_put.c Terminal driving and optimizing routines for low-level
* output (cursor-positioning); output line formatting
* routines.
*
* ex_re.c Global commands, substitute, regular expression
* compilation and execution.
*
* ex_set.c The set command.
*
* ex_subr.c Loads of miscellaneous subroutines.
*
* ex_temp.c Editor buffer routines for main buffer and also
* for named buffers (Q registers if you will.)
*
* ex_tty.c Terminal dependent initializations from termcap
* data base, grabbing of tty modes (at beginning
* and after escapes).
*
* ex_unix.c Routines for the ! command and its variations.
*
* ex_v*.c Visual/open mode routines... see ex_v.c for a
* guide to the overall organization.
*/
static char *progname;
void
erropen(void)
{
close(1);
dup(2);
}
void
usage(void)
{
printf(catgets(catd, 1, 1, "\
Usage: %s [- | -s] [-l] [-L] [-R] [-r [file]] [-t tag]\n\
[-v] [-V] [-w size] [+cmd | -c cmd] file...\n"),
progname);
flush();
exitex(1);
}
void
needarg(int c)
{
erropen();
printf(catgets(catd, 1, 2,
"%s: option requires an argument -- %c\n"), progname, c);
usage();
}
void
invopt(int c)
{
erropen();
printf(catgets(catd, 1, 3, "%s: illegal option -- %c\n"), progname, c);
usage();
}
/*
* Return last component of unix path name p.
*/
char *
tailpath(register char *p)
{
register char *r;
for (r=p; *p; p++)
if (*p == '/')
r = p+1;
return(r);
}
/*
* Check ownership of file. Return nonzero if it exists and is owned by the
* user or the option sourceany is used
*/
int
iownit(char *file)
{
struct stat sb;
if (*file == '.' && value(EXRC) == 0)
return 0;
if (stat(file, &sb))
return 0;
if (value(SOURCEANY))
return 1;
if (sb.st_uid != getuid())
return 0;
if (sb.st_mode & (S_IWOTH | S_IWGRP))
return 0;
return 1;
}
shand
setsig(int signum, shand handler)
{
struct sigaction nact, oact;
nact.sa_handler = handler;
sigemptyset(&nact.sa_mask);
nact.sa_flags = 0;
if (signum == SIGALRM) {
#ifdef SA_INTERRUPT
nact.sa_flags |= SA_INTERRUPT;
#endif
/*EMPTY*/ ;
} else {
#ifdef SA_RESTART
nact.sa_flags |= SA_RESTART;
#endif
/*EMPTY*/ ;
}
if (sigaction(signum, &nact, &oact) != 0)
return SIG_ERR;
return oact.sa_handler;
}
/*
* Initialization, before editing a new file.
* Main thing here is to get a new buffer (in fileinit),
* rest is peripheral state resetting.
*/
void
init(void)
{
register int i;
fileinit();
dot = zero = truedol = unddol = dol = fendcore;
one = zero+1;
undkind = UNDNONE;
chng = 0;
edited = 0;
for (i = 0; i <= 'z'-'a'+1; i++)
names[i] = 1;
anymarks = 0;
}
/*
* Main procedure. Process arguments and then
* transfer control to the main command processing loop
* in the routine commands. We are entered as either "ex", "edit", "vi"
* or "view" and the distinction is made here. Actually, we are "vi" if
* there is a 'v' in our name, "view" is there is a 'w', and "edit" if
* there is a 'd' in our name. For edit we just diddle options;
* for vi we actually force an early visual command.
*/
int
main(register int ac, register char *av[])
{
#ifndef VMUNIX
char *erpath = EXSTRINGS;
#endif
char *cp = NULL;
register int c;
bool ivis;
bool fast = 0;
#ifdef TRACE
register char *tracef;
#endif
CLOBBGRD(ivis);
CLOBBGRD(fast);
CLOBBGRD(cp);
/*
* Initialize the built-in memory allocator.
*/
#ifdef VMUNIX
poolsbrk(0);
#endif
/*
* Immediately grab the tty modes so that we wont
* get messed up if an interrupt comes in quickly.
*/
gTTY(1);
normf = tty;
ppid = getpid();
/*
* Defend against d's, v's, w's, and a's in directories of
* path leading to our true name.
*/
av[0] = tailpath(av[0]);
/*
* Figure out how we were invoked: ex, edit, vi, view.
*/
ivis = any('v', av[0]); /* "vi" */
if (any('w', av[0])) /* "view" */
value(READONLY) = 1;
if (any('d', av[0])) { /* "edit" */
value(SHOWMODE) = 1;
/*
* I do not understand why novices should not
* switch to visual mode. So they can now. gritter
*/
/*value(OPEN) = 0;*/
value(REPORT) = 1;
value(MAGIC) = 0;
}
#ifndef VMUNIX
/*
* For debugging take files out of . if name is a.out.
*/
if (av[0][0] == 'a')
erpath = tailpath(erpath);
#endif /* !VMUNIX */
progname = av[0];
/*
* Open the error message file.
*/
draino();
#ifndef VMUNIX
erfile = open(erpath+4, O_RDONLY);
if (erfile < 0) {
erfile = open(erpath, O_RDONLY);
}
#endif /* !VMUNIX */
pstop();
/*
* Initialize interrupt handling.
*/
oldhup = signal(SIGHUP, SIG_IGN);
if (oldhup == SIG_DFL)
signal(SIGHUP, onhup);
oldquit = signal(SIGQUIT, SIG_IGN);
#ifdef SIGXFSZ
oldxfsz = signal(SIGXFSZ, SIG_IGN);
#endif
ruptible = signal(SIGINT, SIG_IGN) == SIG_DFL;
if (signal(SIGTERM, SIG_IGN) == SIG_DFL)
signal(SIGTERM, onhup);
#ifdef SIGEMT
if (signal(SIGEMT, SIG_IGN) == SIG_DFL)
signal(SIGEMT, onemt);
#endif
#ifdef BIT8
#ifndef ISO8859_1
setlocale(LC_CTYPE, "");
#endif
#endif
#ifdef MB_CUR_MAX
mb_cur_max = MB_CUR_MAX;
#else
mb_cur_max = 1;
#endif
#ifdef MB
TRIM = mb_cur_max > 1 ? 0x6fffffff : 0xff;
QUOTE = mb_cur_max > 1 ? 0x10000000 : 0x100;
#endif
#ifdef LANGMSG
setlocale(LC_MESSAGES, "");
catd = catopen(CATNAME, NL_CAT_LOCALE);
#endif
/*
* Process flag arguments.
*/
ac--, av++;
while (ac) {
if (av[0][0] == '+') {
firstpat = &av[0][1];
if (*firstpat == '\0')
needarg('+');
} else if (av[0][0] == '-') {
arggroup:
c = av[0][1];
if (c == 0
|| c == 's'
) {
hush = 1;
value(AUTOPRINT) = 0;
fast++;
} else switch (c) {
case '-':
if (av[0][2])
invopt('-');
ac--, av++;
goto argend;
case 'R':
value(READONLY) = 1;
break;
#ifdef TRACE
case 'T':
if (av[0][2] == 0)
tracef = "trace";
else {
tracef = tttrace;
tracef[8] = av[0][2];
if (tracef[8])
tracef[9] = av[0][3];
else
tracef[9] = 0;
}
trace = fopen(tracef, "w");
#define tracbuf NULL
if (trace == NULL)
printf(catgets(catd, 1, 4,
"Trace create error\n"));
else
setbuf(trace, tracbuf);
break;
#endif /* TRACE */
case 'c':
if (av[0][2] == '\0' && (av[1] == NULL
|| *av[1] == '-' || *av[1] == '+'))
needarg('c');
if (av[0][2]) {
firstpat = &av[0][2];
} else {
firstpat = av[1];
ac--, av++;
}
break;
case 'e':
ivis = 0;
break;
#ifdef LISPCODE
case 'l':
value(LISP) = 1;
value(SHOWMATCH) = 1;
break;
#endif
case 'L':
case 'r':
recov++;
break;
case 't':
if (av[0][2]) {
tflag = 1;
safecp(lasttag, av[0], sizeof lasttag,
"argument to -t too long");
} else if (ac > 1 && av[1][0] != '-' &&
av[1][0] != '+') {
ac--, av++;
tflag = 1;
safecp(lasttag, av[0], sizeof lasttag,
"argument to -t too long");
} else
needarg('t');
break;
case 'v':
ivis = 1;
break;
case 'V':
verbose = 1;
break;
case 'w':
if (av[0][2])
cp = &av[0][2];
else if (ac > 1 && av[1][0] != '-' && av[1][0] != '+') {
cp = av[1];
ac--, av++;
} else
needarg('w');
defwind = atoi(cp);
break;
default:
invopt(c);
}
if (c && c != 'c' && c != 't' && c != 'w' && av[0][2]) {
av[0]++;
goto arggroup;
}
} else
break;
ac--, av++;
}
argend:
cntrlhm = catgets(catd, 1, 70, "^H discarded\n");
/*
* Initialize end of core pointers.
* Normally we avoid breaking back to fendcore after each
* file since this can be expensive (much core-core copying).
* If your system can scatter load processes you could do
* this as ed does, saving a little core, but it will probably
* not often make much difference.
*/
fendcore = (line *) sbrk(0);
endcore = fendcore - 2;
#ifdef SIGTSTP
if (!hush && signal(SIGTSTP, SIG_IGN) == SIG_DFL)
signal(SIGTSTP, onsusp), dosusp++;
#endif /* SIGTSTP */
/*
* If we are doing a recover and no filename
* was given, then execute an exrecover command with
* the -r option to type out the list of saved file names.
* Otherwise set the remembered file name to the first argument
* file name so the "recover" initial command will find it.
*/
if (recov) {
if (ac == 0) {
ppid = 0;
setrupt();
execl(EXRECOVER, "exrecover", "-r", (char *)0);
filioerr(EXRECOVER);
exitex(1);
}
safecp(savedfile, *av++, sizeof savedfile, "Filename too long");
ac--;
}
/*
* Initialize the argument list.
*/
argv0 = av;
argc0 = ac;
args0 = av[0];
erewind();
/*
* Initialize a temporary file (buffer) and
* set up terminal environment. Read user startup commands.
*/
if (setexit() == 0) {
setrupt();
intty = isatty(0);
value(PROMPT) = intty;
if ((cp = getenv("SHELL")) != NULL && *cp != '\0')
safecp(shell, cp, sizeof shell, "$SHELL too long");
if (fast || !intty)
setterm("dumb");
else {
gettmode();
if ((cp = getenv("TERM")) != 0 && *cp) {
setterm(cp);
}
}
}
if (setexit() == 0) {
/*
* This is necessary because 'if (setexit() == 0 && !fast)'
* is rejected on the Cray.
*/
if (fast)
goto skip;
if ((globp = getenv("EXINIT")) && *globp)
commands(1,1);
else {
globp = 0;
if ((cp = getenv("HOME")) != 0 && *cp) {
safecat(safecp(genbuf, cp, sizeof genbuf,
"$HOME too long"),
"/.exrc", sizeof genbuf,
"$HOME too long");
if (iownit(genbuf))
source(genbuf, 1);
}
}
/*
* Allow local .exrc too. This loses if . is $HOME,
* but nobody should notice unless they do stupid things
* like putting a version command in .exrc. Besides,
* they should be using EXINIT, not .exrc, right?
*
* This may not be done anymore. GR
*/
/*
* The getcwd() function is not present on very
* old Unix systems. So if this fails, comment out
* the following three lines or supply code e.g. from
* the `pwd' utility.
*/
if (cp == NULL || *cp == '\0'
|| getcwd(genbuf, MAXBSIZE) == NULL
|| strcmp(cp, genbuf) != 0)
if (iownit(".exrc"))
source(".exrc", 1);
}
skip: init(); /* moved after prev 2 chunks to fix directory option */
/*
* Initial processing. Handle tag, recover, and file argument
* implied next commands. If going in as 'vi', then don't do
* anything, just set initev so we will do it later (from within
* visual).
*/
if (setexit() == 0) {
if (recov)
globp = "recover";
else if (tflag)
globp = ivis ? "tag" : "tag|p";
else if (argc)
globp = "next";
if (ivis)
initev = globp;
else if (globp) {
inglobal = 1;
commands(1, 1);
inglobal = 0;
}
}
/*
* Vi command... go into visual.
* Strange... everything in vi usually happens
* before we ever "start".
*/
if (ivis) {
/*
* Don't have to be upward compatible with stupidity
* of starting editing at line $.
*/
if (dol > zero)
dot = one;
globp = "visual";
if (setexit() == 0)
commands(1, 1);
}
/*
* Clear out trash in state accumulated by startup,
* and then do the main command loop for a normal edit.
* If you quit out of a 'vi' command by doing Q or ^\,
* you also fall through to here.
*/
seenprompt = 1;
ungetchar(0);
globp = 0;
initev = 0;
setlastchar('\n');
setexit();
commands(0, 0);
cleanup(1);
exitex(0);
/*NOTREACHED*/
return 0;
}