#include <isc/fsaccess.h>
#include <isc/result.h>
#include <isc/util.h>
#define STEP (ISC__FSACCESS_PERMISSIONBITS)
#define GROUP (STEP)
#define OTHER (STEP * 2)
void
isc_fsaccess_add(int trustee, int permission, isc_fsaccess_t *access) {
REQUIRE(trustee <= 0x7);
REQUIRE(permission <= 0xFF);
if ((trustee & ISC_FSACCESS_OWNER) != 0)
*access |= permission;
if ((trustee & ISC_FSACCESS_GROUP) != 0)
*access |= (permission << GROUP);
if ((trustee & ISC_FSACCESS_OTHER) != 0)
*access |= (permission << OTHER);
}
void
isc_fsaccess_remove(int trustee, int permission, isc_fsaccess_t *access) {
REQUIRE(trustee <= 0x7);
REQUIRE(permission <= 0xFF);
if ((trustee & ISC_FSACCESS_OWNER) != 0)
*access &= ~permission;
if ((trustee & ISC_FSACCESS_GROUP) != 0)
*access &= ~(permission << GROUP);
if ((trustee & ISC_FSACCESS_OTHER) != 0)
*access &= ~(permission << OTHER);
}
static isc_result_t
check_bad_bits(isc_fsaccess_t access, isc_boolean_t is_dir) {
isc_fsaccess_t bits;
if (is_dir)
bits = ISC_FSACCESS_READ |
ISC_FSACCESS_WRITE |
ISC_FSACCESS_EXECUTE;
else
bits = ISC_FSACCESS_CREATECHILD |
ISC_FSACCESS_ACCESSCHILD |
ISC_FSACCESS_DELETECHILD |
ISC_FSACCESS_LISTDIRECTORY;
bits |= bits << STEP;
bits |= bits << STEP;
if ((access & bits) != 0) {
if (is_dir)
return (ISC_R_NOTFILE);
else
return (ISC_R_NOTDIRECTORY);
}
return (ISC_R_SUCCESS);
}