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#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/xattr.h>
#include "selinux_internal.h"
#include "policy.h"
int fgetfilecon(int fd, char ** context)
{
char *buf;
ssize_t size;
ssize_t ret;
size = INITCONTEXTLEN + 1;
buf = malloc(size);
if (!buf)
return -1;
memset(buf, 0, size);
ret = fgetxattr(fd, XATTR_NAME_SELINUX, buf, size - 1);
if (ret < 0 && errno == ERANGE) {
char *newbuf;
size = fgetxattr(fd, XATTR_NAME_SELINUX, NULL, 0);
if (size < 0)
goto out;
size++;
newbuf = realloc(buf, size);
if (!newbuf)
goto out;
buf = newbuf;
memset(buf, 0, size);
ret = fgetxattr(fd, XATTR_NAME_SELINUX, buf, size - 1);
}
out:
if (ret == 0) {
/* Re-map empty attribute values to errors. */
errno = EOPNOTSUPP;
ret = -1;
}
if (ret < 0)
free(buf);
else
*context = buf;
return ret;
}
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