ACL_GET_FILE(3) - Linux man page online | Library functions

Get an ACL by filename.

March 23, 2002
ACL_GET_FILE(3) BSD Library Functions Manual ACL_GET_FILE(3)


acl_get_file — get an ACL by filename


Linux Access Control Lists library (libacl, -lacl).


#include <sys/types.h> #include <sys/acl.h> acl_t acl_get_file(const char *path_p, acl_type_t type);


The acl_get_file() function retrieves the access ACL associated with a file or directory, or the default ACL associated with a directory. The pathname for the file or directory is pointed to by the argument path_p. The ACL is placed into working storage and acl_get_file() returns a pointer to that storage. In order to read an ACL from an object, a process must have read access to the object's attributes. The value of the argument type is used to indicate whether the access ACL or the default ACL associated with path_p is returned. If type is ACL_TYPE_ACCESS, the access ACL of path_p is returned. If type is ACL_TYPE_DEFAULT, the default ACL of path_p is returned. If type is ACL_TYPE_DEFAULT and no default ACL is associated with the directory path_p, then an ACL containing zero ACL entries is returned. If type specifies a type of ACL that cannot be associated with path_p, then the function fails. This function may cause memory to be allocated. The caller should free any releasable mem‐ ory, when the new ACL is no longer required, by calling acl_free(3) with the (void*)acl_t returned by acl_get_file() as an argument.


On success, this function returns a pointer to the working storage. On error, a value of (acl_t)NULL is returned, and errno is set appropriately.


If any of the following conditions occur, the acl_get_file() function returns a value of (acl_t)NULL and sets errno to the corresponding value: [EACCES] Search permission is denied for a component of the path prefix or the object exists and the process does not have appropriate access rights. Argument type specifies a type of ACL that cannot be associated with path_p. [EINVAL] The argument type is not ACL_TYPE_ACCESS or ACL_TYPE_DEFAULT. [ENAMETOOLONG] The length of the argument path_p is too long. [ENOENT] The named object does not exist or the argument path_p points to an empty string. [ENOMEM] The ACL working storage requires more memory than is allowed by the hard‐ ware or system-imposed memory management constraints. [ENOTDIR] A component of the path prefix is not a directory. [ENOTSUP] The file system on which the file identified by path_p is located does not support ACLs, or ACLs are disabled.


IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)


acl_free(3), acl_get_entry(3), acl_get_fd(3), acl_set_file(3), acl(5)


Derived from the FreeBSD manual pages written by Robert N M Watson <>, and adapted for Linux by Andreas Gruenbacher <>.
Linux ACL March 23, 2002 Linux ACL
This manual Reference Other manuals
acl_get_file(3) referred by acl(5) | acl_delete_def_file(3) | acl_extended_file(3) | acl_free(3) | acl_from_mode(3) | acl_get_entry(3) | acl_get_fd(3) | acl_init(3) | acl_set_fd(3) | acl_set_file(3) | explain(1) | explain(3) | explain_acl_get_file(3) | explain_acl_get_file_or_die(3)
refer to acl(5) | acl_free(3) | acl_get_entry(3) | acl_get_fd(3) | acl_set_file(3)
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