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/*b
* Copyright (C) 2001,2002 Rick Richardson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Author: Rick Richardson <rickr@mn.rr.com>
b*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include "p2open.h"
static int pids[NOFILE];
int
p2open(char *interp, char *cmd, FILE *fp[2])
{
int sock[2];
pid_t pid;
int rc;
rc = socketpair(AF_UNIX, SOCK_STREAM, 0, sock);
if (rc < 0)
return -1;
pid = fork();
if (pid == 0)
{
close(0);
close(1);
dup2(sock[0], 0);
dup2(sock[0], 1);
close(sock[0]);
close(sock[1]);
if (!interp)
interp = "/bin/sh";
execl(interp, "sh", "-c", cmd, 0);
exit(1);
}
if (pid == -1)
{
close(sock[0]);
close(sock[1]);
return -2;
}
pids[sock[1]] = pid;
fp[0] = fdopen(sock[1], "r");
fp[1] = fdopen(sock[1], "w");
close(sock[0]);
return (0);
}
int
p2close(FILE *fp[2])
{
int fd;
int rc;
int status;
typedef void (*sighandler_t)(int);
sighandler_t isig, qsig, hsig;
if (!fp[0])
return -1;
fd = fileno(fp[0]);
fclose(fp[0]);
isig = signal(SIGINT, SIG_IGN);
qsig = signal(SIGQUIT, SIG_IGN);
hsig = signal(SIGHUP, SIG_IGN);
rc = waitpid(pids[fd], &status, 0);
if (rc == -1)
status = -1;
signal(SIGINT, isig);
signal(SIGQUIT, qsig);
signal(SIGHUP, hsig);
return (status);
}
int
p2kill(FILE *fp[2])
{
int fd;
int rc;
int status;
typedef void (*sighandler_t)(int);
sighandler_t isig, qsig, hsig;
if (!fp[0])
return -1;
fd = fileno(fp[0]);
fclose(fp[0]);
kill(pids[fd], SIGTERM);
isig = signal(SIGINT, SIG_IGN);
qsig = signal(SIGQUIT, SIG_IGN);
hsig = signal(SIGHUP, SIG_IGN);
rc = waitpid(pids[fd], &status, 0);
if (rc == -1)
status = -1;
signal(SIGINT, isig);
signal(SIGQUIT, qsig);
signal(SIGHUP, hsig);
return (status);
}
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