clamav/freshclam/execute.c

/*
 *  By Per Jessen <per@computer.org> with changes by the ClamAV team
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston,
 *  MA 02110-1301, USA.
 */

#if HAVE_CONFIG_H
#include "clamav-config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#ifdef	HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <errno.h>
#ifdef	C_WINDOWS
#include <process.h>
#endif

#include "shared/output.h"
#include "shared/optparser.h"
#include "execute.h"

#define MAX_CHILDREN 5

int active_children;

void execute( const char *type, const char *text, const struct optstruct *opts )
{
	int ret;
#ifndef C_WINDOWS
	pid_t pid;
#endif

    if(!optget(opts, "daemon")->enabled) {
	if(sscanf(text, "EXIT_%d", &ret) == 1) {
	    logg("*%s: EXIT_%d\n", type, ret);
	    exit(ret);
	}
	if(system(text) == -1)
	    logg("%s: system(%s) failed\n", type, text);

	return;
    }

#ifdef        C_WINDOWS
	if(active_children < MAX_CHILDREN) {
		if(spawnlp(P_DETACH, text, text, NULL) == -1) {
			logg("^%s: couldn't execute \"%s\".\n", type, text);
			return;
		}
		active_children++;	/* FIXME: this is never reduced */
	} else
		logg("^%s: already %d processes active.\n", type, active_children);
#else
	if ( active_children<MAX_CHILDREN )
	switch( pid=fork() ) {
	case 0:
		if ( -1==system(text) )
		{
		logg("^%s: couldn't execute \"%s\".\n", type, text);
		}
		exit(0);
	case -1:
		logg("^%s::fork() failed, %s.\n", type, strerror(errno));
		break;
	default:
		active_children++;
	}
	else
	{
		logg("^%s: already %d processes active.\n", type, active_children);
	}
#endif
}