OpenBSD-4.6/usr.bin/vi/cl/cl_main.c
/* $OpenBSD: cl_main.c,v 1.19 2008/03/28 17:58:20 jasper Exp $ */
/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)cl_main.c 10.36 (Berkeley) 10/14/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <bitstring.h>
#include <curses.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <term.h>
#include <termios.h>
#include <unistd.h>
#include "../common/common.h"
#ifdef RUNNING_IP
#include "../ip/ip.h"
#endif
#include "cl.h"
#include "pathnames.h"
GS *__global_list; /* GLOBAL: List of screens. */
sigset_t __sigblockset; /* GLOBAL: Blocked signals. */
static void cl_func_std(GS *);
static CL_PRIVATE *cl_init(GS *);
static GS *gs_init(char *);
static void perr(char *, char *);
static int setsig(int, struct sigaction *, void (*)(int));
static void sig_end(GS *);
static void term_init(char *, char *);
/*
* main --
* This is the main loop for the standalone curses editor.
*/
int
main(int argc, char *argv[])
{
static int reenter;
CL_PRIVATE *clp;
GS *gp;
size_t rows, cols;
int rval;
char *ttype;
#ifdef RUNNING_IP
char *ip_arg;
char **p_av, **t_av;
#endif
/* If loaded at 0 and jumping through a NULL pointer, stop. */
if (reenter++)
abort();
/* Create and initialize the global structure. */
__global_list = gp = gs_init(argv[0]);
/*
* Strip out any arguments that vi isn't going to understand. There's
* no way to portably call getopt twice, so arguments parsed here must
* be removed from the argument list.
*/
#ifdef RUNNING_IP
ip_arg = NULL;
for (p_av = t_av = argv;;) {
if (*t_av == NULL) {
*p_av = NULL;
break;
}
if (!strcmp(*t_av, "--")) {
while ((*p_av++ = *t_av++) != NULL);
break;
}
if (!memcmp(*t_av, "-I", sizeof("-I") - 1)) {
if (t_av[0][2] != '\0') {
ip_arg = t_av[0] + 2;
++t_av;
--argc;
continue;
}
if (t_av[1] != NULL) {
ip_arg = t_av[1];
t_av += 2;
argc -= 2;
continue;
}
}
*p_av++ = *t_av++;
}
/*
* If we're being called as an editor library, we're done here, we
* get loaded with the curses screen, we don't share much code.
*/
if (ip_arg != NULL)
exit (ip_main(argc, argv, gp, ip_arg));
#endif
/* Create and initialize the CL_PRIVATE structure. */
clp = cl_init(gp);
/*
* Initialize the terminal information.
*
* We have to know what terminal it is from the start, since we may
* have to use termcap/terminfo to find out how big the screen is.
*/
if ((ttype = getenv("TERM")) == NULL)
ttype = "unknown";
term_init(gp->progname, ttype);
/* Add the terminal type to the global structure. */
if ((OG_D_STR(gp, GO_TERM) =
OG_STR(gp, GO_TERM) = strdup(ttype)) == NULL)
perr(gp->progname, NULL);
/* Figure out how big the screen is. */
if (cl_ssize(NULL, 0, &rows, &cols, NULL))
exit (1);
/* Add the rows and columns to the global structure. */
OG_VAL(gp, GO_LINES) = OG_D_VAL(gp, GO_LINES) = rows;
OG_VAL(gp, GO_COLUMNS) = OG_D_VAL(gp, GO_COLUMNS) = cols;
/* Ex wants stdout to be buffered. */
(void)setvbuf(stdout, NULL, _IOFBF, 0);
/* Start catching signals. */
if (sig_init(gp, NULL))
exit (1);
/* Run ex/vi. */
rval = editor(gp, argc, argv);
/* Clean up signals. */
sig_end(gp);
/* Clean up the terminal. */
(void)cl_quit(gp);
/*
* XXX
* Reset the O_MESG option.
*/
if (clp->tgw != TGW_UNKNOWN)
(void)cl_omesg(NULL, clp, clp->tgw == TGW_SET);
/*
* XXX
* Reset the X11 xterm icon/window name.
*/
if (F_ISSET(clp, CL_RENAME)) {
(void)printf(XTERM_RENAME, ttype);
(void)fflush(stdout);
}
/* If a killer signal arrived, pretend we just got it. */
if (clp->killersig) {
(void)signal(clp->killersig, SIG_DFL);
(void)kill(getpid(), clp->killersig);
/* NOTREACHED */
}
/* Free the global and CL private areas. */
#if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY)
free(clp);
free(gp);
#endif
exit (rval);
}
/*
* gs_init --
* Create and partially initialize the GS structure.
*/
static GS *
gs_init(name)
char *name;
{
GS *gp;
char *p;
/* Figure out what our name is. */
if ((p = strrchr(name, '/')) != NULL)
name = p + 1;
/* Allocate the global structure. */
CALLOC_NOMSG(NULL, gp, GS *, 1, sizeof(GS));
if (gp == NULL)
perr(name, NULL);
gp->progname = name;
return (gp);
}
/*
* cl_init --
* Create and partially initialize the CL structure.
*/
static CL_PRIVATE *
cl_init(gp)
GS *gp;
{
CL_PRIVATE *clp;
int fd;
/* Allocate the CL private structure. */
CALLOC_NOMSG(NULL, clp, CL_PRIVATE *, 1, sizeof(CL_PRIVATE));
if (clp == NULL)
perr(gp->progname, NULL);
gp->cl_private = clp;
/*
* Set the CL_STDIN_TTY flag. It's purpose is to avoid setting
* and resetting the tty if the input isn't from there. We also
* use the same test to determine if we're running a script or
* not.
*/
if (isatty(STDIN_FILENO))
F_SET(clp, CL_STDIN_TTY);
else
F_SET(gp, G_SCRIPTED);
/*
* We expect that if we've lost our controlling terminal that the
* open() (but not the tcgetattr()) will fail.
*/
if (F_ISSET(clp, CL_STDIN_TTY)) {
if (tcgetattr(STDIN_FILENO, &clp->orig) == -1)
goto tcfail;
} else if ((fd = open(_PATH_TTY, O_RDONLY, 0)) != -1) {
if (tcgetattr(fd, &clp->orig) == -1) {
tcfail: perr(gp->progname, "tcgetattr");
exit (1);
}
(void)close(fd);
}
/* Initialize the list of curses functions. */
cl_func_std(gp);
return (clp);
}
/*
* term_init --
* Initialize terminal information.
*/
static void
term_init(name, ttype)
char *name, *ttype;
{
int err;
/* Set up the terminal database information. */
setupterm(ttype, STDOUT_FILENO, &err);
switch (err) {
case -1:
(void)fprintf(stderr,
"%s: No terminal database found\n", name);
exit (1);
case 0:
(void)fprintf(stderr,
"%s: %s: unknown terminal type\n", name, ttype);
exit (1);
}
}
#define GLOBAL_CLP \
CL_PRIVATE *clp = GCLP(__global_list);
static void
h_hup(signo)
int signo;
{
GLOBAL_CLP;
F_SET(clp, CL_SIGHUP);
clp->killersig = SIGHUP;
}
static void
h_int(signo)
int signo;
{
GLOBAL_CLP;
F_SET(clp, CL_SIGINT);
}
static void
h_term(signo)
int signo;
{
GLOBAL_CLP;
F_SET(clp, CL_SIGTERM);
clp->killersig = SIGTERM;
}
static void
h_winch(signo)
int signo;
{
GLOBAL_CLP;
F_SET(clp, CL_SIGWINCH);
}
#undef GLOBAL_CLP
/*
* sig_init --
* Initialize signals.
*
* PUBLIC: int sig_init(GS *, SCR *);
*/
int
sig_init(gp, sp)
GS *gp;
SCR *sp;
{
CL_PRIVATE *clp;
clp = GCLP(gp);
if (sp == NULL) {
(void)sigemptyset(&__sigblockset);
if (sigaddset(&__sigblockset, SIGHUP) ||
setsig(SIGHUP, &clp->oact[INDX_HUP], h_hup) ||
sigaddset(&__sigblockset, SIGINT) ||
setsig(SIGINT, &clp->oact[INDX_INT], h_int) ||
sigaddset(&__sigblockset, SIGTERM) ||
setsig(SIGTERM, &clp->oact[INDX_TERM], h_term)
#ifdef SIGWINCH
||
sigaddset(&__sigblockset, SIGWINCH) ||
setsig(SIGWINCH, &clp->oact[INDX_WINCH], h_winch)
#endif
) {
perr(gp->progname, NULL);
return (1);
}
} else
if (setsig(SIGHUP, NULL, h_hup) ||
setsig(SIGINT, NULL, h_int) ||
setsig(SIGTERM, NULL, h_term)
#ifdef SIGWINCH
||
setsig(SIGWINCH, NULL, h_winch)
#endif
) {
msgq(sp, M_SYSERR, "signal-reset");
}
return (0);
}
/*
* setsig --
* Set a signal handler.
*/
static int
setsig(signo, oactp, handler)
int signo;
struct sigaction *oactp;
void (*handler)(int);
{
struct sigaction act;
/*
* Use sigaction(2), not signal(3), since we don't always want to
* restart system calls. The example is when waiting for a command
* mode keystroke and SIGWINCH arrives. Besides, you can't portably
* restart system calls (thanks, POSIX!). On the other hand, you
* can't portably NOT restart system calls (thanks, Sun!). SunOS
* used SA_INTERRUPT as their extension to NOT restart read calls.
* We sure hope nobody else used it for anything else. Mom told me
* there'd be days like this. She just never told me that there'd
* be so many.
*/
act.sa_handler = handler;
sigemptyset(&act.sa_mask);
#ifdef SA_INTERRUPT
act.sa_flags = SA_INTERRUPT;
#else
act.sa_flags = 0;
#endif
return (sigaction(signo, &act, oactp));
}
/*
* sig_end --
* End signal setup.
*/
static void
sig_end(gp)
GS *gp;
{
CL_PRIVATE *clp;
clp = GCLP(gp);
(void)sigaction(SIGHUP, NULL, &clp->oact[INDX_HUP]);
(void)sigaction(SIGINT, NULL, &clp->oact[INDX_INT]);
(void)sigaction(SIGTERM, NULL, &clp->oact[INDX_TERM]);
#ifdef SIGWINCH
(void)sigaction(SIGWINCH, NULL, &clp->oact[INDX_WINCH]);
#endif
}
/*
* cl_func_std --
* Initialize the standard curses functions.
*/
static void
cl_func_std(gp)
GS *gp;
{
gp->scr_addstr = cl_addstr;
gp->scr_attr = cl_attr;
gp->scr_baud = cl_baud;
gp->scr_bell = cl_bell;
gp->scr_busy = NULL;
gp->scr_clrtoeol = cl_clrtoeol;
gp->scr_cursor = cl_cursor;
gp->scr_deleteln = cl_deleteln;
gp->scr_event = cl_event;
gp->scr_ex_adjust = cl_ex_adjust;
gp->scr_fmap = cl_fmap;
gp->scr_insertln = cl_insertln;
gp->scr_keyval = cl_keyval;
gp->scr_move = cl_move;
gp->scr_msg = NULL;
gp->scr_optchange = cl_optchange;
gp->scr_refresh = cl_refresh;
gp->scr_rename = cl_rename;
gp->scr_screen = cl_screen;
gp->scr_suspend = cl_suspend;
gp->scr_usage = cl_usage;
}
/*
* perr --
* Print system error.
*/
static void
perr(name, msg)
char *name, *msg;
{
(void)fprintf(stderr, "%s:", name);
if (msg != NULL)
(void)fprintf(stderr, "%s:", msg);
(void)fprintf(stderr, "%s\n", strerror(errno));
exit(1);
}