mirror of
https://github.com/SELinuxProject/selinux
synced 2024-12-24 23:12:05 +00:00
9eb9c93275
In attempting to enable building various part of Android with -Wall -Werror, we found that the const security_context_t declarations in libselinux are incorrect; const char * was intended, but const security_context_t translates to char * const and triggers warnings on passing const char * from the caller. Easiest fix is to replace them all with const char *. And while we are at it, just get rid of all usage of security_context_t itself as it adds no value - there is no true encapsulation of the security context strings and callers already directly use string functions on them. typedef left to permit building legacy users until such a time as all are updated. This is a port of Change-Id I2f9df7bb9f575f76024c3e5f5b660345da2931a7 from Android, augmented to deal with all of the other code in upstream libselinux and updating the man pages too. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Eric Paris <eparis@redhat.com>
74 lines
1.2 KiB
C
74 lines
1.2 KiB
C
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include "selinux_internal.h"
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <sys/xattr.h>
|
|
#include "policy.h"
|
|
|
|
int getfilecon_raw(const char *path, 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 = getxattr(path, XATTR_NAME_SELINUX, buf, size - 1);
|
|
if (ret < 0 && errno == ERANGE) {
|
|
char *newbuf;
|
|
|
|
size = getxattr(path, 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 = getxattr(path, XATTR_NAME_SELINUX, buf, size - 1);
|
|
}
|
|
out:
|
|
if (ret == 0) {
|
|
/* Re-map empty attribute values to errors. */
|
|
errno = ENOTSUP;
|
|
ret = -1;
|
|
}
|
|
if (ret < 0)
|
|
free(buf);
|
|
else
|
|
*context = buf;
|
|
return ret;
|
|
}
|
|
|
|
hidden_def(getfilecon_raw)
|
|
|
|
int getfilecon(const char *path, char ** context)
|
|
{
|
|
int ret;
|
|
char * rcontext;
|
|
|
|
*context = NULL;
|
|
|
|
ret = getfilecon_raw(path, &rcontext);
|
|
|
|
if (ret > 0) {
|
|
ret = selinux_raw_to_trans_context(rcontext, context);
|
|
freecon(rcontext);
|
|
}
|
|
if (ret >= 0 && *context)
|
|
return strlen(*context) + 1;
|
|
|
|
return ret;
|
|
}
|
|
|
|
hidden_def(getfilecon)
|