#include <unistd.h>

#include <fcntl.h>

#include <string.h>

#include "selinux_internal.h"

#include <stdlib.h>

#include <errno.h>

#include <asm/page.h>

#include "policy.h"

int getprevcon_raw(security_context_t *context)

{

	char *buf;

	size_t size;

	int fd;

	ssize_t ret;

	fd = open("/proc/self/attr/prev", O_RDONLY);

	if (fd < 0)

		return -1;

	size = PAGE_SIZE;

	buf = malloc(size);

	if (!buf) {

		ret = -1;

		goto out;

	}

	memset(buf, 0, size);

	ret = read(fd, buf, size-1);

	if (ret < 0)

		goto out2;

	*context = strdup(buf);

	if (!(*context)) {

		ret = -1;

		goto out2;

	}

	ret = 0;

out2:			

	free(buf);

out:

	close(fd);

	return ret;

}

hidden_def(getprevcon_raw)

int getprevcon(security_context_t *context)

{

	int ret;

	security_context_t rcontext;

 	ret = getprevcon_raw(&rcontext);

	if (context_translations && !ret) {

		if (raw_to_trans_context(rcontext, context)) {

			*context = NULL;

			ret = -1;

		}

		freecon(rcontext);

	} else if (!ret)

		*context = rcontext;

	return ret;

}

hidden_def(getprevcon)