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freebsd-dev/contrib/nvi/common/main.c
Peter Wemm b8ba871bd9 Import of nvi-1.79, minus a few bits that we dont need (eg: postscript 
files, curses, db, regex etc that we already have).  The other glue will
follow shortly.

Obtained from: Keith Bostic <bostic@bostic.com>
1996-11-01 06:45:43 +00:00

618 lines
14 KiB
C
Raw Blame History

/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n\
@(#) Copyright (c) 1992, 1993, 1994, 1995, 1996\n\
Keith Bostic. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char sccsid[] = "@(#)main.c 10.48 (Berkeley) 10/11/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "../vi/vi.h"
#include "pathnames.h"
static void attach __P((GS *));
static void v_estr __P((char *, int, char *));
static int v_obsolete __P((char *, char *[]));
/*
* editor --
* Main editor routine.
*
* PUBLIC: int editor __P((GS *, int, char *[]));
*/
int
editor(gp, argc, argv)
GS *gp;
int argc;
char *argv[];
{
extern int optind;
extern char *optarg;
const char *p;
EVENT ev;
FREF *frp;
SCR *sp;
size_t len;
u_int flags;
int ch, flagchk, lflag, secure, startup, readonly, rval, silent;
char *tag_f, *wsizearg, path[256];
/* Initialize the busy routine, if not defined by the screen. */
if (gp->scr_busy == NULL)
gp->scr_busy = vs_busy;
/* Initialize the message routine, if not defined by the screen. */
if (gp->scr_msg == NULL)
gp->scr_msg = vs_msg;
/* Common global structure initialization. */
CIRCLEQ_INIT(&gp->dq);
CIRCLEQ_INIT(&gp->hq);
LIST_INIT(&gp->ecq);
LIST_INSERT_HEAD(&gp->ecq, &gp->excmd, q);
gp->noprint = DEFAULT_NOPRINT;
/* Structures shared by screens so stored in the GS structure. */
CIRCLEQ_INIT(&gp->frefq);
CIRCLEQ_INIT(&gp->dcb_store.textq);
LIST_INIT(&gp->cutq);
LIST_INIT(&gp->seqq);
/* Set initial screen type and mode based on the program name. */
readonly = 0;
if (!strcmp(gp->progname, "ex") || !strcmp(gp->progname, "nex"))
LF_INIT(SC_EX);
else {
/* Nview, view are readonly. */
if (!strcmp(gp->progname, "nview") ||
!strcmp(gp->progname, "view"))
readonly = 1;
/* Vi is the default. */
LF_INIT(SC_VI);
}
/* Convert old-style arguments into new-style ones. */
if (v_obsolete(gp->progname, argv))
return (1);
/* Parse the arguments. */
flagchk = '\0';
tag_f = wsizearg = NULL;
lflag = secure = silent = 0;
startup = 1;
/* Set the file snapshot flag. */
F_SET(gp, G_SNAPSHOT);
#ifdef DEBUG
while ((ch = getopt(argc, argv, "c:D:eFlRrSsT:t:vw:")) != EOF)
#else
while ((ch = getopt(argc, argv, "c:eFlRrSst:vw:")) != EOF)
#endif
switch (ch) {
case 'c': /* Run the command. */
/*
* XXX
* We should support multiple -c options.
*/
if (gp->c_option != NULL) {
v_estr(gp->progname, 0,
"only one -c command may be specified.");
return (1);
}
gp->c_option = optarg;
break;
#ifdef DEBUG
case 'D':
switch (optarg[0]) {
case 's':
startup = 0;
break;
case 'w':
attach(gp);
break;
default:
v_estr(gp->progname, 0,
"usage: -D requires s or w argument.");
return (1);
}
break;
#endif
case 'e': /* Ex mode. */
LF_CLR(SC_VI);
LF_SET(SC_EX);
break;
case 'F': /* No snapshot. */
F_CLR(gp, G_SNAPSHOT);
break;
case 'l': /* Set lisp, showmatch options. */
lflag = 1;
break;
case 'R': /* Readonly. */
readonly = 1;
break;
case 'r': /* Recover. */
if (flagchk == 't') {
v_estr(gp->progname, 0,
"only one of -r and -t may be specified.");
return (1);
}
flagchk = 'r';
break;
case 'S':
secure = 1;
break;
case 's':
silent = 1;
break;
#ifdef DEBUG
case 'T': /* Trace. */
if ((gp->tracefp = fopen(optarg, "w")) == NULL) {
v_estr(gp->progname, errno, optarg);
goto err;
}
(void)fprintf(gp->tracefp,
"\n===\ntrace: open %s\n", optarg);
break;
#endif
case 't': /* Tag. */
if (flagchk == 'r') {
v_estr(gp->progname, 0,
"only one of -r and -t may be specified.");
return (1);
}
if (flagchk == 't') {
v_estr(gp->progname, 0,
"only one tag file may be specified.");
return (1);
}
flagchk = 't';
tag_f = optarg;
break;
case 'v': /* Vi mode. */
LF_CLR(SC_EX);
LF_SET(SC_VI);
break;
case 'w':
wsizearg = optarg;
break;
case '?':
default:
(void)gp->scr_usage();
return (1);
}
argc -= optind;
argv += optind;
/*
* -s option is only meaningful to ex.
*
* If not reading from a terminal, it's like -s was specified.
*/
if (silent && !LF_ISSET(SC_EX)) {
v_estr(gp->progname, 0, "-s option is only applicable to ex.");
goto err;
}
if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED))
silent = 1;
/*
* Build and initialize the first/current screen. This is a bit
* tricky. If an error is returned, we may or may not have a
* screen structure. If we have a screen structure, put it on a
* display queue so that the error messages get displayed.
*
* !!!
* Everything we do until we go interactive is done in ex mode.
*/
if (screen_init(gp, NULL, &sp)) {
if (sp != NULL)
CIRCLEQ_INSERT_HEAD(&gp->dq, sp, q);
goto err;
}
F_SET(sp, SC_EX);
CIRCLEQ_INSERT_HEAD(&gp->dq, sp, q);
if (v_key_init(sp)) /* Special key initialization. */
goto err;
{ int oargs[5], *oargp = oargs;
if (lflag) { /* Command-line options. */
*oargp++ = O_LISP;
*oargp++ = O_SHOWMATCH;
}
if (readonly)
*oargp++ = O_READONLY;
if (secure)
*oargp++ = O_SECURE;
*oargp = -1; /* Options initialization. */
if (opts_init(sp, oargs))
goto err;
}
if (wsizearg != NULL) {
ARGS *av[2], a, b;
(void)snprintf(path, sizeof(path), "window=%s", wsizearg);
a.bp = (CHAR_T *)path;
a.len = strlen(path);
b.bp = NULL;
b.len = 0;
av[0] = &a;
av[1] = &b;
(void)opts_set(sp, av, NULL);
}
if (silent) { /* Ex batch mode option values. */
O_CLR(sp, O_AUTOPRINT);
O_CLR(sp, O_PROMPT);
O_CLR(sp, O_VERBOSE);
O_CLR(sp, O_WARN);
F_SET(sp, SC_EX_SILENT);
}
sp->rows = O_VAL(sp, O_LINES); /* Make ex formatting work. */
sp->cols = O_VAL(sp, O_COLUMNS);
if (!silent && startup) { /* Read EXINIT, exrc files. */
if (ex_exrc(sp))
goto err;
if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
if (screen_end(sp))
goto err;
goto done;
}
}
/*
* List recovery files if -r specified without file arguments.
* Note, options must be initialized and startup information
* read before doing this.
*/
if (flagchk == 'r' && argv[0] == NULL) {
if (rcv_list(sp))
goto err;
if (screen_end(sp))
goto err;
goto done;
}
/*
* !!!
* Initialize the default ^D, ^U scrolling value here, after the
* user has had every opportunity to set the window option.
*
* It's historic practice that changing the value of the window
* option did not alter the default scrolling value, only giving
* a count to ^D/^U did that.
*/
sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2;
/*
* If we don't have a command-line option, switch into the right
* editor now, so that we position default files correctly, and
* so that any tags file file-already-locked messages are in the
* vi screen, not the ex screen.
*
* XXX
* If we have a command-line option, the error message can end
* up in the wrong place, but I think that the combination is
* unlikely.
*/
if (gp->c_option == NULL) {
F_CLR(sp, SC_EX | SC_VI);
F_SET(sp, LF_ISSET(SC_EX | SC_VI));
}
/* Open a tag file if specified. */
if (tag_f != NULL && ex_tag_first(sp, tag_f))
goto err;
/*
* Append any remaining arguments as file names. Files are recovery
* files if -r specified. If the tag option or ex startup commands
* loaded a file, then any file arguments are going to come after it.
*/
if (*argv != NULL) {
if (sp->frp != NULL) {
/* Cheat -- we know we have an extra argv slot. */
MALLOC_NOMSG(sp,
*--argv, char *, strlen(sp->frp->name) + 1);
if (*argv == NULL) {
v_estr(gp->progname, errno, NULL);
goto err;
}
(void)strcpy(*argv, sp->frp->name);
}
sp->argv = sp->cargv = argv;
F_SET(sp, SC_ARGNOFREE);
if (flagchk == 'r')
F_SET(sp, SC_ARGRECOVER);
}
/*
* If the ex startup commands and or/the tag option haven't already
* created a file, create one. If no command-line files were given,
* use a temporary file.
*/
if (sp->frp == NULL) {
if (sp->argv == NULL) {
if ((frp = file_add(sp, NULL)) == NULL)
goto err;
} else {
if ((frp = file_add(sp, (CHAR_T *)sp->argv[0])) == NULL)
goto err;
if (F_ISSET(sp, SC_ARGRECOVER))
F_SET(frp, FR_RECOVER);
}
if (file_init(sp, frp, NULL, 0))
goto err;
if (EXCMD_RUNNING(gp)) {
(void)ex_cmd(sp);
if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
if (screen_end(sp))
goto err;
goto done;
}
}
}
/*
* Check to see if we need to wait for ex. If SC_SCR_EX is set, ex
* was forced to initialize the screen during startup. We'd like to
* wait for a single character from the user, but we can't because
* we're not in raw mode. We can't switch to raw mode because the
* vi initialization will switch to xterm's alternate screen, causing
* us to lose the messages we're pausing to make sure the user read.
* So, wait for a complete line.
*/
if (F_ISSET(sp, SC_SCR_EX)) {
p = msg_cmsg(sp, CMSG_CONT_R, &len);
(void)write(STDOUT_FILENO, p, len);
for (;;) {
if (v_event_get(sp, &ev, 0, 0))
goto err;
if (ev.e_event == E_INTERRUPT ||
ev.e_event == E_CHARACTER &&
(ev.e_value == K_CR || ev.e_value == K_NL))
break;
(void)gp->scr_bell(sp);
}
}
/* Switch into the right editor, regardless. */
F_CLR(sp, SC_EX | SC_VI);
F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT);
/*
* Main edit loop. Vi handles split screens itself, we only return
* here when switching editor modes or restarting the screen.
*/
while (sp != NULL)
if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp))
goto err;
done: rval = 0;
if (0)
err: rval = 1;
/* Clean out the global structure. */
v_end(gp);
return (rval);
}
/*
* v_end --
* End the program, discarding screens and most of the global area.
*
* PUBLIC: void v_end __P((GS *));
*/
void
v_end(gp)
GS *gp;
{
MSGS *mp;
SCR *sp;
/* If there are any remaining screens, kill them off. */
if (gp->ccl_sp != NULL) {
(void)file_end(gp->ccl_sp, NULL, 1);
(void)screen_end(gp->ccl_sp);
}
while ((sp = gp->dq.cqh_first) != (void *)&gp->dq)
(void)screen_end(sp);
while ((sp = gp->hq.cqh_first) != (void *)&gp->hq)
(void)screen_end(sp);
#ifdef HAVE_PERL_INTERP
perl_end(gp);
#endif
#if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY)
{ FREF *frp;
/* Free FREF's. */
while ((frp = gp->frefq.cqh_first) != (FREF *)&gp->frefq) {
CIRCLEQ_REMOVE(&gp->frefq, frp, q);
if (frp->name != NULL)
free(frp->name);
if (frp->tname != NULL)
free(frp->tname);
free(frp);
}
}
/* Free key input queue. */
if (gp->i_event != NULL)
free(gp->i_event);
/* Free cut buffers. */
cut_close(gp);
/* Free map sequences. */
seq_close(gp);
/* Free default buffer storage. */
(void)text_lfree(&gp->dcb_store.textq);
/* Close message catalogs. */
msg_close(gp);
#endif
/* Ring the bell if scheduled. */
if (F_ISSET(gp, G_BELLSCHED))
(void)fprintf(stderr, "\07"); /* \a */
/*
* Flush any remaining messages. If a message is here, it's almost
* certainly the message about the event that killed us (although
* it's possible that the user is sourcing a file that exits from the
* editor).
*/
while ((mp = gp->msgq.lh_first) != NULL) {
(void)fprintf(stderr, "%s%.*s",
mp->mtype == M_ERR ? "ex/vi: " : "", (int)mp->len, mp->buf);
LIST_REMOVE(mp, q);
#if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY)
free(mp->buf);
free(mp);
#endif
}
#if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY)
/* Free any temporary space. */
if (gp->tmp_bp != NULL)
free(gp->tmp_bp);
#if defined(DEBUG)
/* Close debugging file descriptor. */
if (gp->tracefp != NULL)
(void)fclose(gp->tracefp);
#endif
#endif
}
/*
* v_obsolete --
* Convert historic arguments into something getopt(3) will like.
*/
static int
v_obsolete(name, argv)
char *name, *argv[];
{
size_t len;
char *p;
/*
* Translate old style arguments into something getopt will like.
* Make sure it's not text space memory, because ex modifies the
* strings.
* Change "+" into "-c$".
* Change "+<anything else>" into "-c<anything else>".
* Change "-" into "-s"
* The c, T, t and w options take arguments so they can't be
* special arguments.
*
* Stop if we find "--" as an argument, the user may want to edit
* a file named "+foo".
*/
while (*++argv && strcmp(argv[0], "--"))
if (argv[0][0] == '+') {
if (argv[0][1] == '\0') {
MALLOC_NOMSG(NULL, argv[0], char *, 4);
if (argv[0] == NULL)
goto nomem;
(void)strcpy(argv[0], "-c$");
} else {
p = argv[0];
len = strlen(argv[0]);
MALLOC_NOMSG(NULL, argv[0], char *, len + 2);
if (argv[0] == NULL)
goto nomem;
argv[0][0] = '-';
argv[0][1] = 'c';
(void)strcpy(argv[0] + 2, p + 1);
}
} else if (argv[0][0] == '-')
if (argv[0][1] == '\0') {
MALLOC_NOMSG(NULL, argv[0], char *, 3);
if (argv[0] == NULL) {
nomem: v_estr(name, errno, NULL);
return (1);
}
(void)strcpy(argv[0], "-s");
} else
if ((argv[0][1] == 'c' || argv[0][1] == 'T' ||
argv[0][1] == 't' || argv[0][1] == 'w') &&
argv[0][2] == '\0')
++argv;
return (0);
}
#ifdef DEBUG
static void
attach(gp)
GS *gp;
{
int fd;
char ch;
if ((fd = open(_PATH_TTY, O_RDONLY, 0)) < 0) {
v_estr(gp->progname, errno, _PATH_TTY);
return;
}
(void)printf("process %lu waiting, enter <CR> to continue: ",
(u_long)getpid());
(void)fflush(stdout);
do {
if (read(fd, &ch, 1) != 1) {
(void)close(fd);
return;
}
} while (ch != '\n' && ch != '\r');
(void)close(fd);
}
#endif
static void
v_estr(name, eno, msg)
char *name, *msg;
int eno;
{
(void)fprintf(stderr, "%s", name);
if (msg != NULL)
(void)fprintf(stderr, ": %s", msg);
if (eno)
(void)fprintf(stderr, ": %s", strerror(errno));
(void)fprintf(stderr, "\n");
}
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