/*
 * Copyright 2005 Red Hat, Inc.
 *
 * 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, and the entire permission notice in its entirety,
 *    including the disclaimer of warranties.
 * 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. The name of the author may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 * ALTERNATIVELY, this product may be distributed under the terms of the
 * GNU Lesser General Public License, in which case the provisions of the
 * LGPL are required INSTEAD OF the above restrictions.
 *
 * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
 */

#include "../config.h"

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#ifdef HAVE_SECURITY_PAM_APPL_H
#include <security/pam_appl.h>
#endif

#ifdef HAVE_SECURITY_PAM_MODULES_H
#include <security/pam_modules.h>
#endif

#include "log.h"
#include "shmem.h"
#include "xstr.h"

#ident "$Id: shmcat.c,v 1.2 2005/11/01 18:13:38 nalin Exp $"

int
main(int argc, char **argv)
{
	int i, key;
	void *addr;
	size_t size, written;
	ssize_t ret;
	if (argc < 2) {
		fprintf(stderr, "Usage: shmcat [id ...]\n");
		return 1;
	}
	for (i = 1; i < argc; i++) {
		key = atoi(argv[i]);
		addr = _pam_krb5_shm_attach(key, &size);
		if (addr != NULL) {
			written = 0;
			while (written < size) {
				ret = write(STDOUT_FILENO, addr + written,
					    size - written);
				if ((ret == 0) ||
				    ((ret == -1) && (errno != EAGAIN))) {
					break;
				}
				if (ret != -1) {
					written += ret;
				}
			}
			_pam_krb5_shm_detach(addr);
		} else {
			fprintf(stderr, "Error attaching to segment %d!\n",
				key);
		}
	}
	return 0;
}