NetBSD-5.0.2/dist/nvi/common/main.c
/* $NetBSD: main.c,v 1.2.2.1 2009/01/20 02:41:11 snj Exp $ */
/*-
* 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[] =
"%Z% Copyright (c) 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n\
%Z% Copyright (c) 1992, 1993, 1994, 1995, 1996\n\
Keith Bostic. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char sccsid[] = "Id: main.c,v 10.63 2001/11/01 15:24:43 skimo Exp (Berkeley) Date: 2001/11/01 15:24:43";
#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 v_estr __P((const char *, int, const char *));
static int v_obsolete __P((char *, char *[]));
/*
* editor --
* Main editor routine.
*
* PUBLIC: int editor __P((WIN *, int, char *[]));
*/
int
editor(WIN *wp, int argc, char **argv)
{
extern int optind;
extern char *optarg;
const char *p;
EVENT ev;
FREF *frp;
SCR *sp;
GS *gp;
size_t len;
u_int flags;
int ch, flagchk, lflag, secure, startup, readonly, rval, silent;
#ifdef GTAGS
int gtags = 0;
#endif
char *tag_f, *wsizearg, path[256];
const CHAR_T *w;
size_t wlen;
gp = wp->gp;
/* 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 (wp->scr_msg == NULL)
wp->scr_msg = vs_msg;
/* 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);
while ((ch = getopt(argc, argv, "c:"
#ifdef DEBUG
"D:"
#endif
"eF"
#ifdef GTAGS
"G"
#endif
"lRrSsT:t:vw:")) != EOF)
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. */
v_estr(gp->progname, 0,
"-F option no longer supported.");
break;
case 'l': /* Set lisp, showmatch options. */
lflag = 1;
break;
#ifdef GTAGS
case 'G': /* gtags mode. */
gtags = 1;
break;
#endif
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 TRACE
case 'T': /* Trace. */
(void)vtrace_init(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(&wp->scrq, sp, q);
sp->wp = wp;
}
goto err;
}
F_SET(sp, SC_EX);
CIRCLEQ_INSERT_HEAD(&wp->scrq, sp, q);
sp->wp = wp;
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;
#ifdef GTAGS
if (gtags)
*oargp++ = O_GTAGSMODE;
#endif
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) {
CHAR2INT(sp, tag_f, strlen(tag_f) + 1, w, wlen);
if (ex_tag_first(sp, w))
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, 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(wp)) {
(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;
return (rval);
}
/*
* v_obsolete --
* Convert historic arguments into something getopt(3) will like.
*/
static int
v_obsolete(char *name, char **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(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(const char *name, int eno, const char *msg)
{
(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");
}