xref: /original-bsd/usr.bin/uucp/shio.c (revision 7e9b2efe)

#ifndef lint
static char sccsid[] = "@(#)shio.c	5.2 (Berkeley) 01/22/85";
#endif

#include "uucp.h"
#include <signal.h>

/*******
 *	shio(cmd, fi, fo, user)	execute shell of command with
 *	char *cmd, *fi, *fo;	fi and fo as standard input/output
 *	char *user;		user name
 *
 *	return codes:
 *		0  - ok
 *		non zero -  failed  -  status from child
 */

shio(cmd, fi, fo, user)
char *cmd, *fi, *fo, *user;
{
	int status, f;
	int uid, pid, ret;
	char path[MAXFULLNAME];
	extern int errno;

	if (fi == NULL)
		fi = DEVNULL;
	if (fo == NULL)
		fo = DEVNULL;

	DEBUG(3, "shio - %s\n", cmd);
#ifdef SIGCHLD
	signal(SIGCHLD, SIG_IGN);
#endif SIGCHLD
	if ((pid = fork()) == 0) {
		signal(SIGINT, SIG_IGN);
		signal(SIGHUP, SIG_IGN);
		signal(SIGQUIT, SIG_IGN);
		signal(SIGKILL, SIG_IGN);
		close(Ifn);
		close(Ofn);
		close(0);
		if (user == NULL || (gninfo(user, &uid, path) != 0)
			|| setuid(uid))
			setuid(getuid());
		f = open(subfile(fi), 0);
		if (f != 0) {
			logent(fi, "CAN'T READ");
			exit(-errno);
		}
		close(1);
		f = creat(subfile(fo), 0666);
		if (f != 1) {
			logent(fo, "CAN'T WRITE");
			exit(-errno);
		}
		execl(SHELL, "sh", "-c", cmd, (char *)0);
		exit(100+errno);
	}
	while ((ret = wait(&status)) != pid && ret != -1)
		;
	DEBUG(3, "status %d\n", status);
	return status;
}