144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)ex_shell.c 8.21 (Berkeley) 3/23/94";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <bitstring.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#include "compat.h"
|
|
#include <db.h>
|
|
#include <regex.h>
|
|
|
|
#include "vi.h"
|
|
#include "excmd.h"
|
|
#include "../svi/svi_screen.h"
|
|
|
|
/*
|
|
* ex_shell -- :sh[ell]
|
|
* Invoke the program named in the SHELL environment variable
|
|
* with the argument -i.
|
|
*/
|
|
int
|
|
ex_shell(sp, ep, cmdp)
|
|
SCR *sp;
|
|
EXF *ep;
|
|
EXCMDARG *cmdp;
|
|
{
|
|
char buf[MAXPATHLEN];
|
|
|
|
(void)snprintf(buf, sizeof(buf), "%s -i", O_STR(sp, O_SHELL));
|
|
return (ex_exec_proc(sp, buf, "\n", NULL));
|
|
}
|
|
|
|
/*
|
|
* ex_exec_proc --
|
|
* Run a separate process.
|
|
*/
|
|
int
|
|
ex_exec_proc(sp, cmd, p1, p2)
|
|
SCR *sp;
|
|
char *cmd, *p1, *p2;
|
|
{
|
|
const char *name;
|
|
pid_t pid;
|
|
int rval, teardown;
|
|
|
|
/* Clear the rest of the screen. */
|
|
if (sp->s_clear(sp))
|
|
return (1);
|
|
|
|
/* Save ex/vi terminal settings, and restore the original ones. */
|
|
teardown = !ex_sleave(sp);
|
|
|
|
/* Put out various messages. */
|
|
if (p1 != NULL)
|
|
(void)write(STDOUT_FILENO, p1, strlen(p1));
|
|
if (p2 != NULL)
|
|
(void)write(STDOUT_FILENO, p2, strlen(p2));
|
|
|
|
|
|
switch (pid = vfork()) {
|
|
case -1: /* Error. */
|
|
msgq(sp, M_SYSERR, "vfork");
|
|
rval = 1;
|
|
goto err;
|
|
case 0: /* Utility. */
|
|
/*
|
|
* The utility has default signal behavior. Don't bother
|
|
* using sigaction(2) 'cause we want the default behavior.
|
|
*/
|
|
(void)signal(SIGINT, SIG_DFL);
|
|
(void)signal(SIGQUIT, SIG_DFL);
|
|
|
|
if ((name = strrchr(O_STR(sp, O_SHELL), '/')) == NULL)
|
|
name = O_STR(sp, O_SHELL);
|
|
else
|
|
++name;
|
|
execl(O_STR(sp, O_SHELL), name, "-c", cmd, NULL);
|
|
msgq(sp, M_ERR, "Error: execl: %s: %s",
|
|
O_STR(sp, O_SHELL), strerror(errno));
|
|
_exit(127);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
rval = proc_wait(sp, (long)pid, cmd, 0);
|
|
|
|
/* Restore ex/vi terminal settings. */
|
|
err: if (teardown)
|
|
ex_rleave(sp);
|
|
|
|
/*
|
|
* XXX
|
|
* Stat of the tty structures (see ex_sleave, ex_rleave) only give
|
|
* us 1-second resolution on the tty changes. A fast '!' command,
|
|
* e.g. ":!pwd" can beat us to the refresh. When there's better
|
|
* resolution from the stat(2) timers, this can go away.
|
|
*/
|
|
F_SET(sp, S_REFRESH);
|
|
|
|
return (rval);
|
|
}
|