diff options
Diffstat (limited to 'acl/c.go')
| -rw-r--r-- | acl/c.go | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/acl/c.go b/acl/c.go deleted file mode 100644 index 7609e142..00000000 --- a/acl/c.go +++ /dev/null @@ -1,196 +0,0 @@ -package acl - -import "C" -import ( - "errors" - "runtime" - "syscall" - "unsafe" -) - -/* -#cgo linux pkg-config: --static libacl - -#include <stdlib.h> -#include <sys/acl.h> -#include <acl/libacl.h> - -static acl_t _go_acl_get_file(const char *path_p, acl_type_t type) { - acl_t acl = acl_get_file(path_p, type); - free((void *)path_p); - return acl; -} - -static int _go_acl_set_file(const char *path_p, acl_type_t type, acl_t acl) { - if (acl_valid(acl) != 0) { - return -1; - } - - int ret = acl_set_file(path_p, type, acl); - free((void *)path_p); - return ret; -} -*/ -import "C" - -func getFile(name string, t C.acl_type_t) (*ACL, error) { - a, err := C._go_acl_get_file(C.CString(name), t) - if errors.Is(err, syscall.ENODATA) { - err = nil - } - - return newACL(a), err -} - -func (acl *ACL) setFile(name string, t C.acl_type_t) error { - _, err := C._go_acl_set_file(C.CString(name), t, acl.acl) - return err -} - -func newACL(a C.acl_t) *ACL { - acl := &ACL{a} - runtime.SetFinalizer(acl, (*ACL).free) - return acl -} - -type ACL struct { - acl C.acl_t -} - -func (acl *ACL) free() { - C.acl_free(unsafe.Pointer(acl.acl)) - - // no need for a finalizer anymore - runtime.SetFinalizer(acl, nil) -} - -const ( - Read = C.ACL_READ - Write = C.ACL_WRITE - Execute = C.ACL_EXECUTE - - TypeDefault = C.ACL_TYPE_DEFAULT - TypeAccess = C.ACL_TYPE_ACCESS - - UndefinedTag = C.ACL_UNDEFINED_TAG - UserObj = C.ACL_USER_OBJ - User = C.ACL_USER - GroupObj = C.ACL_GROUP_OBJ - Group = C.ACL_GROUP - Mask = C.ACL_MASK - Other = C.ACL_OTHER -) - -type ( - Perm C.acl_perm_t -) - -func (acl *ACL) removeEntry(tt C.acl_tag_t, tq int) error { - var e C.acl_entry_t - - // get first entry - if r, err := C.acl_get_entry(acl.acl, C.ACL_FIRST_ENTRY, &e); err != nil { - return err - } else if r == 0 { - // return on acl with no entries - return nil - } - - for { - if r, err := C.acl_get_entry(acl.acl, C.ACL_NEXT_ENTRY, &e); err != nil { - return err - } else if r == 0 { - // return on drained acl - return nil - } - - var ( - q int - t C.acl_tag_t - ) - - // get current entry tag type - if _, err := C.acl_get_tag_type(e, &t); err != nil { - return err - } - - // get current entry qualifier - if rq, err := C.acl_get_qualifier(e); err != nil { - // neither ACL_USER nor ACL_GROUP - if errors.Is(err, syscall.EINVAL) { - continue - } - - return err - } else { - q = *(*int)(rq) - C.acl_free(rq) - } - - // delete on match - if t == tt && q == tq { - _, err := C.acl_delete_entry(acl.acl, e) - return err - } - } -} - -func UpdatePerm(name string, uid int, perms ...Perm) error { - // read acl from file - a, err := getFile(name, TypeAccess) - if err != nil { - return err - } - // free acl on return if get is successful - defer a.free() - - // remove existing entry - if err = a.removeEntry(User, uid); err != nil { - return err - } - - // create new entry if perms are passed - if len(perms) > 0 { - // create new acl entry - var e C.acl_entry_t - if _, err = C.acl_create_entry(&a.acl, &e); err != nil { - return err - } - - // get perm set of new entry - var p C.acl_permset_t - if _, err = C.acl_get_permset(e, &p); err != nil { - return err - } - - // add target perms - for _, perm := range perms { - if _, err = C.acl_add_perm(p, C.acl_perm_t(perm)); err != nil { - return err - } - } - - // set perm set to new entry - if _, err = C.acl_set_permset(e, p); err != nil { - return err - } - - // set user tag to new entry - if _, err = C.acl_set_tag_type(e, User); err != nil { - return err - } - - // set qualifier (uid) to new entry - if _, err = C.acl_set_qualifier(e, unsafe.Pointer(&uid)); err != nil { - return err - } - } - - // calculate mask after update - if _, err = C.acl_calc_mask(&a.acl); err != nil { - return err - } - - // write acl to file - return a.setFile(name, TypeAccess) -} |