/* mail-wrapper.c --- Generic wrapper that will take info from a environment
 * variable, and pass it to two commands.
 *
 * Copyright (C) 1998 by the Free Software Foundation, Inc.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "common.h"

/* TBD: Should make these arrays too?... */
#define LEGAL_PARENT_UID MAIL_UID	     /* mail's UID */
#define LEGAL_PARENT_GID MAIL_GID	     /* mail's GID */

const int parentuid = LEGAL_PARENT_UID;
const int parentgid = LEGAL_PARENT_GID;
const char* logident = "Mailman mail-wrapper";



const char *VALID_COMMANDS[] = {
	"post", 
	"mailcmd",
	"mailowner",
	NULL				     /* Sentinel, don't remove */
};


/* Might want to make this full path.  I can write whatever program named
 * sendmail, so this isn't much for security.
*/
const char *LEGAL_PARENT_NAMES[] = {
	"sendmail",
	NULL				     /* Sentinel, don't remove */
};




int
check_parent(char *parent)
{
	int i = 0;

	while (LEGAL_PARENT_NAMES[i]) {
		if (!strcmp(parent, LEGAL_PARENT_NAMES[i]))
			return 1;
		i++;
	}
	return 0;
}


int
check_command(char *command)
{
	int i = 0;

	while (VALID_COMMANDS[i] != NULL) {
		if (!strcmp(command, VALID_COMMANDS[i]))
			return 1;
		i++;
	}
	return 0;
}



int
main(int argc, char** argv, char** env)
{
	int status;

	/* sanity check arguments */
	if (argc < 2)
		fatal(logident, "Usage: %s program [args...]\n", argv[0]);

	if (!check_command(argv[1]))
		fatal(logident, "Illegal command: %s", argv[1]);

	check_caller(logident, parentuid, parentgid);

	/* If we got here, everything must be OK */
	status = setuid(geteuid());
	if (status)
		fatal(logident, "%s", strerror(errno));

	status = run_script(argv[1], argc, argv, env);
	fatal(logident, "%s", strerror(errno));
	return status;
}



/*
 * Local Variables:
 * c-file-style: "python"
 * End:
 */