608 lines
14 KiB
C
608 lines
14 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "$Id: main.c,v 11.0 2012/10/17 06:34:37 zy Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <bitstring.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.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 "common.h"
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#include "../vi/vi.h"
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#include "pathnames.h"
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static void attach(GS *);
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static void v_estr(char *, int, char *);
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static int v_obsolete(char *, char *[]);
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/*
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* editor --
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* Main editor routine.
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*
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* PUBLIC: int editor(GS *, int, char *[]);
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*/
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int
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editor(
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GS *gp,
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int argc,
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char *argv[])
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{
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extern int optind;
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extern char *optarg;
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const char *p;
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EVENT ev;
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FREF *frp;
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SCR *sp;
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size_t len;
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u_int flags;
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int ch, flagchk, lflag, secure, startup, readonly, rval, silent;
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char *tag_f, *wsizearg, path[256];
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CHAR_T *w;
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size_t wlen;
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/* Initialize the busy routine, if not defined by the screen. */
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if (gp->scr_busy == NULL)
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gp->scr_busy = vs_busy;
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/* Initialize the message routine, if not defined by the screen. */
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if (gp->scr_msg == NULL)
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gp->scr_msg = vs_msg;
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gp->catd = (nl_catd)-1;
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/* Common global structure initialization. */
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TAILQ_INIT(gp->dq);
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TAILQ_INIT(gp->hq);
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SLIST_INIT(gp->ecq);
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SLIST_INSERT_HEAD(gp->ecq, &gp->excmd, q);
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gp->noprint = DEFAULT_NOPRINT;
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/* Structures shared by screens so stored in the GS structure. */
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TAILQ_INIT(gp->frefq);
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TAILQ_INIT(gp->dcb_store.textq);
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SLIST_INIT(gp->cutq);
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SLIST_INIT(gp->seqq);
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/* Set initial screen type and mode based on the program name. */
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readonly = 0;
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if (!strcmp(gp->progname, "ex") || !strcmp(gp->progname, "nex"))
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LF_INIT(SC_EX);
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else {
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/* Nview, view are readonly. */
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if (!strcmp(gp->progname, "nview") ||
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!strcmp(gp->progname, "view"))
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readonly = 1;
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/* Vi is the default. */
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LF_INIT(SC_VI);
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}
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/* Convert old-style arguments into new-style ones. */
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if (v_obsolete(gp->progname, argv))
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return (1);
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/* Parse the arguments. */
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flagchk = '\0';
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tag_f = wsizearg = NULL;
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lflag = secure = silent = 0;
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startup = 1;
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/* Set the file snapshot flag. */
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F_SET(gp, G_SNAPSHOT);
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#ifdef DEBUG
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while ((ch = getopt(argc, argv, "c:D:eFlRrSsT:t:vw:")) != EOF)
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#else
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while ((ch = getopt(argc, argv, "c:eFlRrSst:vw:")) != EOF)
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#endif
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switch (ch) {
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case 'c': /* Run the command. */
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/*
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* XXX
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* We should support multiple -c options.
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*/
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if (gp->c_option != NULL) {
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v_estr(gp->progname, 0,
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"only one -c command may be specified.");
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return (1);
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}
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gp->c_option = optarg;
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break;
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#ifdef DEBUG
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case 'D':
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switch (optarg[0]) {
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case 's':
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startup = 0;
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break;
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case 'w':
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attach(gp);
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break;
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default:
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v_estr(gp->progname, 0,
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"usage: -D requires s or w argument.");
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return (1);
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}
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break;
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#endif
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case 'e': /* Ex mode. */
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LF_CLR(SC_VI);
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LF_SET(SC_EX);
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break;
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case 'F': /* No snapshot. */
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F_CLR(gp, G_SNAPSHOT);
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break;
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case 'l': /* Set lisp, showmatch options. */
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lflag = 1;
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break;
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case 'R': /* Readonly. */
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readonly = 1;
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break;
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case 'r': /* Recover. */
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if (flagchk == 't') {
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v_estr(gp->progname, 0,
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"only one of -r and -t may be specified.");
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return (1);
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}
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flagchk = 'r';
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break;
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case 'S':
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secure = 1;
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break;
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case 's':
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silent = 1;
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break;
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#ifdef DEBUG
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case 'T': /* Trace. */
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if ((gp->tracefp = fopen(optarg, "w")) == NULL) {
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v_estr(gp->progname, errno, optarg);
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goto err;
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}
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(void)fprintf(gp->tracefp,
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"\n===\ntrace: open %s\n", optarg);
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break;
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#endif
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case 't': /* Tag. */
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if (flagchk == 'r') {
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v_estr(gp->progname, 0,
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"only one of -r and -t may be specified.");
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return (1);
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}
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if (flagchk == 't') {
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v_estr(gp->progname, 0,
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"only one tag file may be specified.");
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return (1);
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}
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flagchk = 't';
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tag_f = optarg;
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break;
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case 'v': /* Vi mode. */
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LF_CLR(SC_EX);
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LF_SET(SC_VI);
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break;
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case 'w':
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wsizearg = optarg;
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break;
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case '?':
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default:
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(void)gp->scr_usage();
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return (1);
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}
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argc -= optind;
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argv += optind;
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/*
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* -s option is only meaningful to ex.
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*
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* If not reading from a terminal, it's like -s was specified.
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*/
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if (silent && !LF_ISSET(SC_EX)) {
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v_estr(gp->progname, 0, "-s option is only applicable to ex.");
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goto err;
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}
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if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED))
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silent = 1;
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/*
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* Build and initialize the first/current screen. This is a bit
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* tricky. If an error is returned, we may or may not have a
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* screen structure. If we have a screen structure, put it on a
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* display queue so that the error messages get displayed.
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*
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* !!!
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* Everything we do until we go interactive is done in ex mode.
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*/
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if (screen_init(gp, NULL, &sp)) {
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if (sp != NULL)
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TAILQ_INSERT_HEAD(gp->dq, sp, q);
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goto err;
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}
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F_SET(sp, SC_EX);
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TAILQ_INSERT_HEAD(gp->dq, sp, q);
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if (v_key_init(sp)) /* Special key initialization. */
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goto err;
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{ int oargs[5], *oargp = oargs;
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if (lflag) { /* Command-line options. */
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*oargp++ = O_LISP;
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*oargp++ = O_SHOWMATCH;
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}
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if (readonly)
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*oargp++ = O_READONLY;
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if (secure)
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*oargp++ = O_SECURE;
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*oargp = -1; /* Options initialization. */
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if (opts_init(sp, oargs))
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goto err;
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}
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if (wsizearg != NULL) {
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ARGS *av[2], a, b;
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(void)snprintf(path, sizeof(path), "window=%s", wsizearg);
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a.bp = (CHAR_T *)path;
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a.len = strlen(path);
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b.bp = NULL;
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b.len = 0;
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av[0] = &a;
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av[1] = &b;
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(void)opts_set(sp, av, NULL);
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}
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if (silent) { /* Ex batch mode option values. */
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O_CLR(sp, O_AUTOPRINT);
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O_CLR(sp, O_PROMPT);
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O_CLR(sp, O_VERBOSE);
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O_CLR(sp, O_WARN);
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F_SET(sp, SC_EX_SILENT);
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}
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sp->rows = O_VAL(sp, O_LINES); /* Make ex formatting work. */
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sp->cols = O_VAL(sp, O_COLUMNS);
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if (!silent && startup) { /* Read EXINIT, exrc files. */
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if (ex_exrc(sp))
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goto err;
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if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
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if (screen_end(sp))
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goto err;
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goto done;
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}
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}
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/*
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* List recovery files if -r specified without file arguments.
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* Note, options must be initialized and startup information
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* read before doing this.
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*/
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if (flagchk == 'r' && argv[0] == NULL) {
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if (rcv_list(sp))
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goto err;
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if (screen_end(sp))
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goto err;
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goto done;
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}
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/*
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* !!!
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* Initialize the default ^D, ^U scrolling value here, after the
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* user has had every opportunity to set the window option.
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*
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* It's historic practice that changing the value of the window
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* option did not alter the default scrolling value, only giving
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* a count to ^D/^U did that.
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*/
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sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2;
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/*
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* If we don't have a command-line option, switch into the right
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* editor now, so that we position default files correctly, and
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* so that any tags file file-already-locked messages are in the
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* vi screen, not the ex screen.
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*
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* XXX
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* If we have a command-line option, the error message can end
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* up in the wrong place, but I think that the combination is
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* unlikely.
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*/
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if (gp->c_option == NULL) {
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F_CLR(sp, SC_EX | SC_VI);
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F_SET(sp, LF_ISSET(SC_EX | SC_VI));
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}
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/* Open a tag file if specified. */
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if (tag_f != NULL) {
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CHAR2INT(sp, tag_f, strlen(tag_f) + 1, w, wlen);
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if (ex_tag_first(sp, w))
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goto err;
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}
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/*
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* Append any remaining arguments as file names. Files are recovery
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* files if -r specified. If the tag option or ex startup commands
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* loaded a file, then any file arguments are going to come after it.
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*/
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if (*argv != NULL) {
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if (sp->frp != NULL) {
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/* Cheat -- we know we have an extra argv slot. */
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*--argv = strdup(sp->frp->name);
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if (*argv == NULL) {
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v_estr(gp->progname, errno, NULL);
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goto err;
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}
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}
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sp->argv = sp->cargv = argv;
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F_SET(sp, SC_ARGNOFREE);
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if (flagchk == 'r')
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F_SET(sp, SC_ARGRECOVER);
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}
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/*
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* If the ex startup commands and or/the tag option haven't already
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* created a file, create one. If no command-line files were given,
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* use a temporary file.
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*/
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if (sp->frp == NULL) {
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if (sp->argv == NULL) {
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if ((frp = file_add(sp, NULL)) == NULL)
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goto err;
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} else {
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if ((frp = file_add(sp, sp->argv[0])) == NULL)
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goto err;
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if (F_ISSET(sp, SC_ARGRECOVER))
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F_SET(frp, FR_RECOVER);
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}
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if (file_init(sp, frp, NULL, 0))
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goto err;
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if (EXCMD_RUNNING(gp)) {
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(void)ex_cmd(sp);
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if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
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if (screen_end(sp))
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goto err;
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goto done;
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}
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}
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}
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/*
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* Check to see if we need to wait for ex. If SC_SCR_EX is set, ex
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* was forced to initialize the screen during startup. We'd like to
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* wait for a single character from the user, but we can't because
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* we're not in raw mode. We can't switch to raw mode because the
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* vi initialization will switch to xterm's alternate screen, causing
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* us to lose the messages we're pausing to make sure the user read.
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* So, wait for a complete line.
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*/
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if (F_ISSET(sp, SC_SCR_EX)) {
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p = msg_cmsg(sp, CMSG_CONT_R, &len);
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(void)write(STDOUT_FILENO, p, len);
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for (;;) {
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if (v_event_get(sp, &ev, 0, 0))
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goto err;
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if (ev.e_event == E_INTERRUPT ||
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(ev.e_event == E_CHARACTER &&
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(ev.e_value == K_CR || ev.e_value == K_NL)))
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break;
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(void)gp->scr_bell(sp);
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}
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}
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/* Switch into the right editor, regardless. */
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F_CLR(sp, SC_EX | SC_VI);
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F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT);
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/*
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* Main edit loop. Vi handles split screens itself, we only return
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* here when switching editor modes or restarting the screen.
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*/
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while (sp != NULL)
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if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp))
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goto err;
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done: rval = 0;
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if (0)
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err: rval = 1;
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/* Clean out the global structure. */
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v_end(gp);
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return (rval);
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}
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/*
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* v_end --
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* End the program, discarding screens and most of the global area.
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*
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* PUBLIC: void v_end(GS *);
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*/
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void
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v_end(gp)
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GS *gp;
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{
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MSGS *mp;
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SCR *sp;
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/* If there are any remaining screens, kill them off. */
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if (gp->ccl_sp != NULL) {
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(void)file_end(gp->ccl_sp, NULL, 1);
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(void)screen_end(gp->ccl_sp);
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}
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while ((sp = TAILQ_FIRST(gp->dq)) != NULL)
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(void)screen_end(sp);
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while ((sp = TAILQ_FIRST(gp->hq)) != NULL)
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(void)screen_end(sp);
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#if defined(DEBUG) || defined(PURIFY)
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{ FREF *frp;
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/* Free FREF's. */
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while ((frp = TAILQ_FIRST(gp->frefq)) != NULL) {
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TAILQ_REMOVE(gp->frefq, frp, q);
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if (frp->name != NULL)
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free(frp->name);
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if (frp->tname != NULL)
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free(frp->tname);
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free(frp);
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}
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}
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/* Free key input queue. */
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if (gp->i_event != NULL)
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free(gp->i_event);
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/* Free cut buffers. */
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cut_close(gp);
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/* Free map sequences. */
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seq_close(gp);
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/* Free default buffer storage. */
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(void)text_lfree(gp->dcb_store.textq);
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/* Close message catalogs. */
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msg_close(gp);
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#endif
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/* Ring the bell if scheduled. */
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if (F_ISSET(gp, G_BELLSCHED))
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(void)fprintf(stderr, "\07"); /* \a */
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/*
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* Flush any remaining messages. If a message is here, it's almost
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* certainly the message about the event that killed us (although
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* it's possible that the user is sourcing a file that exits from the
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* editor).
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*/
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while ((mp = SLIST_FIRST(gp->msgq)) != NULL) {
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(void)fprintf(stderr, "%s%.*s",
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mp->mtype == M_ERR ? "ex/vi: " : "", (int)mp->len, mp->buf);
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SLIST_REMOVE_HEAD(gp->msgq, q);
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#if defined(DEBUG) || defined(PURIFY)
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free(mp->buf);
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free(mp);
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#endif
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}
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#if defined(DEBUG) || defined(PURIFY)
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/* Free any temporary space. */
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if (gp->tmp_bp != NULL)
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free(gp->tmp_bp);
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#if defined(DEBUG)
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/* Close debugging file descriptor. */
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if (gp->tracefp != NULL)
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(void)fclose(gp->tracefp);
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#endif
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#endif
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}
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/*
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* v_obsolete --
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* Convert historic arguments into something getopt(3) will like.
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*/
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static int
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v_obsolete(
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char *name,
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char *argv[])
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{
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size_t len;
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char *p;
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/*
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* Translate old style arguments into something getopt will like.
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* Make sure it's not text space memory, because ex modifies the
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* strings.
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* Change "+" into "-c$".
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* Change "+<anything else>" into "-c<anything else>".
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* Change "-" into "-s"
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* The c, T, t and w options take arguments so they can't be
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* special arguments.
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|
*
|
|
* 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') {
|
|
argv[0] = strdup("-c$");
|
|
if (argv[0] == NULL)
|
|
goto nomem;
|
|
} else {
|
|
p = argv[0];
|
|
len = strlen(argv[0]);
|
|
argv[0] = malloc(len + 2);
|
|
if (argv[0] == NULL)
|
|
goto nomem;
|
|
argv[0][0] = '-';
|
|
argv[0][1] = 'c';
|
|
(void)strlcpy(argv[0] + 2, p + 1, len);
|
|
}
|
|
} else if (argv[0][0] == '-')
|
|
if (argv[0][1] == '\0') {
|
|
argv[0] = strdup("-s");
|
|
if (argv[0] == NULL) {
|
|
nomem: v_estr(name, errno, NULL);
|
|
return (1);
|
|
}
|
|
} 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(
|
|
char *name,
|
|
int eno,
|
|
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");
|
|
}
|