482 lines
9.9 KiB
C
482 lines
9.9 KiB
C
/* $NetBSD: cl_main.c,v 1.5 2001/05/01 16:46:11 aymeric Exp $ */
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/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 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[] = "@(#)cl_main.c 10.36 (Berkeley) 10/14/96";
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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 <bitstring.h>
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#include <curses.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.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 <termios.h>
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#include <unistd.h>
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#include "../common/common.h"
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#ifdef RUNNING_IP
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#include "../ip/ip.h"
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#endif
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#include "cl.h"
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#include "pathnames.h"
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GS *__global_list; /* GLOBAL: List of screens. */
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sigset_t __sigblockset; /* GLOBAL: Blocked signals. */
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int main __P((int, char **));
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static void cl_func_std __P((GS *));
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static CL_PRIVATE *cl_init __P((GS *));
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static GS *gs_init __P((char *));
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static void perr __P((char *, char *));
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static int setsig __P((int, struct sigaction *, void (*)(int)));
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static void sig_end __P((GS *));
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static void term_init __P((char *, char *));
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static void h_hup __P((int));
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static void h_int __P((int));
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static void h_term __P((int));
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static void h_winch __P((int));
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/*
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* main --
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* This is the main loop for the standalone curses editor.
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*/
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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static int reenter;
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CL_PRIVATE *clp;
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GS *gp;
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size_t rows, cols;
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int rval;
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char *ip_arg, *ttype;
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#ifdef RUNNING_IP
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char **p_av, **t_av;
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#endif
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/* If loaded at 0 and jumping through a NULL pointer, stop. */
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if (reenter++)
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abort();
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/* Create and initialize the global structure. */
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__global_list = gp = gs_init(argv[0]);
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/*
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* Strip out any arguments that vi isn't going to understand. There's
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* no way to portably call getopt twice, so arguments parsed here must
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* be removed from the argument list.
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*/
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#ifdef RUNNING_IP
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ip_arg = NULL;
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for (p_av = t_av = argv;;) {
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if (*t_av == NULL) {
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*p_av = NULL;
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break;
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}
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if (!strcmp(*t_av, "--")) {
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while ((*p_av++ = *t_av++) != NULL);
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break;
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}
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if (!memcmp(*t_av, "-I", sizeof("-I") - 1)) {
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if (t_av[0][2] != '\0') {
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ip_arg = t_av[0] + 2;
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++t_av;
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--argc;
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continue;
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}
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if (t_av[1] != NULL) {
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ip_arg = t_av[1];
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t_av += 2;
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argc -= 2;
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continue;
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}
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}
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*p_av++ = *t_av++;
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}
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/*
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* If we're being called as an editor library, we're done here, we
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* get loaded with the curses screen, we don't share much code.
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*/
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if (ip_arg != NULL)
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exit (ip_main(argc, argv, gp, ip_arg));
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#else
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ip_arg = argv[0];
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#endif /* RUNNING_IP */
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/* Create and initialize the CL_PRIVATE structure. */
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clp = cl_init(gp);
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/*
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* Initialize the terminal information.
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*
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* We have to know what terminal it is from the start, since we may
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* have to use termcap/terminfo to find out how big the screen is.
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*/
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if ((ttype = getenv("TERM")) == NULL) {
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fprintf(stderr,"WARNING: TERM environment variable not set.\n");
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ttype = "unknown";
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}
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term_init(gp->progname, ttype);
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/* Add the terminal type to the global structure. */
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if ((OG_D_STR(gp, GO_TERM) =
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OG_STR(gp, GO_TERM) = strdup(ttype)) == NULL)
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perr(gp->progname, NULL);
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/* Figure out how big the screen is. */
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if (cl_ssize(NULL, 0, &rows, &cols, NULL))
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exit (1);
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/* Add the rows and columns to the global structure. */
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OG_VAL(gp, GO_LINES) = OG_D_VAL(gp, GO_LINES) = rows;
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OG_VAL(gp, GO_COLUMNS) = OG_D_VAL(gp, GO_COLUMNS) = cols;
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/* Ex wants stdout to be buffered. */
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(void)setvbuf(stdout, NULL, _IOFBF, 0);
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/* Start catching signals. */
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if (sig_init(gp, NULL))
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exit (1);
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/* Run ex/vi. */
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rval = editor(gp, argc, argv);
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/* Clean up signals. */
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sig_end(gp);
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/* Clean up the terminal. */
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(void)cl_quit(gp);
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/*
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* XXX
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* Reset the O_MESG option.
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*/
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if (clp->tgw != TGW_UNKNOWN)
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(void)cl_omesg(NULL, clp, clp->tgw == TGW_SET);
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/*
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* XXX
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* Reset the X11 xterm icon/window name.
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*/
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if (F_ISSET(clp, CL_RENAME)) {
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(void)printf(XTERM_RENAME, ttype);
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(void)fflush(stdout);
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}
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/* If a killer signal arrived, pretend we just got it. */
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if (clp->killersig) {
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(void)signal(clp->killersig, SIG_DFL);
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(void)kill(getpid(), clp->killersig);
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/* NOTREACHED */
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}
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/* Free the global and CL private areas. */
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#if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY)
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free(clp);
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free(gp);
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#endif
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exit (rval);
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}
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/*
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* gs_init --
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* Create and partially initialize the GS structure.
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*/
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static GS *
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gs_init(name)
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char *name;
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{
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GS *gp;
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char *p;
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/* Figure out what our name is. */
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if ((p = strrchr(name, '/')) != NULL)
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name = p + 1;
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/* Allocate the global structure. */
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CALLOC_NOMSG(NULL, gp, GS *, 1, sizeof(GS));
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if (gp == NULL)
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perr(name, NULL);
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gp->progname = name;
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return (gp);
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}
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/*
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* cl_init --
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* Create and partially initialize the CL structure.
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*/
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static CL_PRIVATE *
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cl_init(gp)
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GS *gp;
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{
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CL_PRIVATE *clp;
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int fd;
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/* Allocate the CL private structure. */
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CALLOC_NOMSG(NULL, clp, CL_PRIVATE *, 1, sizeof(CL_PRIVATE));
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if (clp == NULL)
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perr(gp->progname, NULL);
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gp->cl_private = clp;
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/*
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* Set the CL_STDIN_TTY flag. It's purpose is to avoid setting
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* and resetting the tty if the input isn't from there. We also
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* use the same test to determine if we're running a script or
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* not.
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*/
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if (isatty(STDIN_FILENO))
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F_SET(clp, CL_STDIN_TTY);
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else
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F_SET(gp, G_SCRIPTED);
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/*
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* We expect that if we've lost our controlling terminal that the
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* open() (but not the tcgetattr()) will fail.
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*/
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if (F_ISSET(clp, CL_STDIN_TTY)) {
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if (tcgetattr(STDIN_FILENO, &clp->orig) == -1)
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goto tcfail;
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} else if ((fd = open(_PATH_TTY, O_RDONLY, 0)) != -1) {
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if (tcgetattr(fd, &clp->orig) == -1) {
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tcfail: perr(gp->progname, "tcgetattr");
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exit (1);
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}
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(void)close(fd);
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}
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/* Initialize the list of curses functions. */
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cl_func_std(gp);
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return (clp);
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}
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/*
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* term_init --
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* Initialize terminal information.
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*/
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static void
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term_init(name, ttype)
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char *name, *ttype;
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{
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int err;
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/* Set up the terminal database information. */
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setupterm(ttype, STDOUT_FILENO, &err);
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switch (err) {
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case -1:
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(void)fprintf(stderr,
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"%s: No terminal database found\n", name);
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exit (1);
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case 0:
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(void)fprintf(stderr,
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"%s: %s: unknown terminal type\n", name, ttype);
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exit (1);
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}
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}
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#define GLOBAL_CLP \
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CL_PRIVATE *clp = GCLP(__global_list);
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static void
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h_hup(signo)
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int signo;
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{
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GLOBAL_CLP;
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F_SET(clp, CL_SIGHUP);
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clp->killersig = SIGHUP;
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}
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static void
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h_int(signo)
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int signo;
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{
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GLOBAL_CLP;
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F_SET(clp, CL_SIGINT);
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}
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static void
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h_term(signo)
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int signo;
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{
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GLOBAL_CLP;
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F_SET(clp, CL_SIGTERM);
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clp->killersig = SIGTERM;
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}
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static void
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h_winch(signo)
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int signo;
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{
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GLOBAL_CLP;
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F_SET(clp, CL_SIGWINCH);
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}
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#undef GLOBAL_CLP
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/*
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* sig_init --
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* Initialize signals.
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*
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* PUBLIC: int sig_init __P((GS *, SCR *));
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*/
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int
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sig_init(gp, sp)
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GS *gp;
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SCR *sp;
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{
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CL_PRIVATE *clp;
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clp = GCLP(gp);
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if (sp == NULL) {
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(void)sigemptyset(&__sigblockset);
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if (sigaddset(&__sigblockset, SIGHUP) ||
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setsig(SIGHUP, &clp->oact[INDX_HUP], h_hup) ||
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sigaddset(&__sigblockset, SIGINT) ||
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setsig(SIGINT, &clp->oact[INDX_INT], h_int) ||
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sigaddset(&__sigblockset, SIGTERM) ||
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setsig(SIGTERM, &clp->oact[INDX_TERM], h_term)
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#ifdef SIGWINCH
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||
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sigaddset(&__sigblockset, SIGWINCH) ||
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setsig(SIGWINCH, &clp->oact[INDX_WINCH], h_winch)
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#endif
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) {
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perr(gp->progname, NULL);
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return (1);
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}
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} else
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if (setsig(SIGHUP, NULL, h_hup) ||
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setsig(SIGINT, NULL, h_int) ||
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setsig(SIGTERM, NULL, h_term)
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#ifdef SIGWINCH
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||
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setsig(SIGWINCH, NULL, h_winch)
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#endif
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) {
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msgq(sp, M_SYSERR, "signal-reset");
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}
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return (0);
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}
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/*
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* setsig --
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* Set a signal handler.
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*/
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static int
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setsig(signo, oactp, handler)
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int signo;
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struct sigaction *oactp;
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void (*handler) __P((int));
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{
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struct sigaction act;
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/*
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* Use sigaction(2), not signal(3), since we don't always want to
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* restart system calls. The example is when waiting for a command
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* mode keystroke and SIGWINCH arrives. Besides, you can't portably
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* restart system calls (thanks, POSIX!). On the other hand, you
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* can't portably NOT restart system calls (thanks, Sun!). SunOS
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* used SA_INTERRUPT as their extension to NOT restart read calls.
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* We sure hope nobody else used it for anything else. Mom told me
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* there'd be days like this. She just never told me that there'd
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* be so many.
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*/
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act.sa_handler = handler;
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sigemptyset(&act.sa_mask);
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#ifdef SA_INTERRUPT
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act.sa_flags = SA_INTERRUPT;
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#else
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act.sa_flags = 0;
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#endif
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return (sigaction(signo, &act, oactp));
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}
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/*
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* sig_end --
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* End signal setup.
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*/
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static void
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sig_end(gp)
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GS *gp;
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{
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CL_PRIVATE *clp;
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clp = GCLP(gp);
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(void)sigaction(SIGHUP, NULL, &clp->oact[INDX_HUP]);
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(void)sigaction(SIGINT, NULL, &clp->oact[INDX_INT]);
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(void)sigaction(SIGTERM, NULL, &clp->oact[INDX_TERM]);
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#ifdef SIGWINCH
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(void)sigaction(SIGWINCH, NULL, &clp->oact[INDX_WINCH]);
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#endif
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}
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/*
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* cl_func_std --
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* Initialize the standard curses functions.
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*/
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static void
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cl_func_std(gp)
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GS *gp;
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{
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gp->scr_addstr = cl_addstr;
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gp->scr_attr = cl_attr;
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gp->scr_baud = cl_baud;
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gp->scr_bell = cl_bell;
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gp->scr_busy = NULL;
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gp->scr_clrtoeol = cl_clrtoeol;
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gp->scr_cursor = cl_cursor;
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gp->scr_deleteln = cl_deleteln;
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gp->scr_event = cl_event;
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gp->scr_ex_adjust = cl_ex_adjust;
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gp->scr_fmap = cl_fmap;
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gp->scr_insertln = cl_insertln;
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gp->scr_keyval = cl_keyval;
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gp->scr_move = cl_move;
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gp->scr_msg = NULL;
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gp->scr_optchange = cl_optchange;
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gp->scr_refresh = cl_refresh;
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gp->scr_rename = cl_rename;
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gp->scr_screen = cl_screen;
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gp->scr_suspend = cl_suspend;
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gp->scr_usage = cl_usage;
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}
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/*
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* perr --
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* Print system error.
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*/
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static void
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perr(name, msg)
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char *name, *msg;
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{
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(void)fprintf(stderr, "%s:", name);
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if (msg != NULL)
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(void)fprintf(stderr, "%s:", msg);
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(void)fprintf(stderr, "%s\n", strerror(errno));
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exit(1);
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}
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