blob: 19231b5c902fd5f1ecb6c90dd4eae4da61a8ac6e [file] [log] [blame]
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
#include "selinux_internal.h"
#include "policy.h"
#include "mapping.h"
int security_compute_create(const security_context_t scon,
const security_context_t tcon,
security_class_t tclass,
security_context_t * newcon)
{
char path[PATH_MAX];
char *buf;
size_t size;
int fd, ret;
if (!selinux_mnt) {
errno = ENOENT;
return -1;
}
snprintf(path, sizeof path, "%s/create", selinux_mnt);
fd = open(path, O_RDWR);
if (fd < 0)
return -1;
size = selinux_page_size;
buf = malloc(size);
if (!buf) {
ret = -1;
goto out;
}
snprintf(buf, size, "%s %s %hu", scon, tcon, unmap_class(tclass));
ret = write(fd, buf, strlen(buf));
if (ret < 0)
goto out2;
memset(buf, 0, size);
ret = read(fd, buf, size - 1);
if (ret < 0)
goto out2;
*newcon = strdup(buf);
if (!(*newcon)) {
ret = -1;
goto out2;
}
ret = 0;
out2:
free(buf);
out:
close(fd);
return ret;
}