07-05-2012
Whether it's the right approach or not really depends on what perm does. It might be the right approach. It might not. We literally have no idea.
Until you explain what perm actually does -- the input you feed into it and the output you expect from it -- we can't help you.
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LEARN ABOUT OSX
acl_delete_perm
ACL_DELETE_PERM(3) BSD Library Functions Manual ACL_DELETE_PERM(3)
NAME
acl_delete_perm -- delete permissions from a permission set
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h>
#include <sys/acl.h>
int
acl_delete_perm(acl_permset_t permset_d, acl_perm_t perm);
DESCRIPTION
The acl_delete_perm() function is a POSIX.1e call that removes specific permissions from permissions set perm.
RETURN VALUES
The acl_delete_perm() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to
indicate the error.
ERRORS
The acl_delete_perm() function fails if:
[EINVAL] Argument permset_d is not a valid descriptor for a permission set. Argument perm does not contain a valid acl_perm_t
value.
SEE ALSO
acl(3), acl_add_perm(3), acl_clear_perms(3), acl_get_permset(3), acl_set_permset(3), posix1e(3)
STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17.
HISTORY
POSIX.1e support was introduced in FreeBSD 4.0. The acl_delete_perm() function was added in FreeBSD 5.0.
AUTHORS
The acl_delete_perm() function was written by Chris D. Faulhaber <jedgar@fxp.org>.
BSD
March 10, 2001 BSD