2016-01-07 01:41:36 +08:00
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/* sec_posixacl.h: Internal definitions for POSIX ACLs.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include <cygwin/acl.h>
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#include <sys/acl.h>
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#include <acl/libacl.h>
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/* Magic marker for acl_t. */
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#define ACL_MAGIC (0xacdccdcadcaccacdULL)
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/* Only used internally as a_type for deleted entries. */
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#define ACL_DELETED_TAG (0xffff)
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/* Only used internally from acl_to_text/acl_to_any_text. */
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#define TEXT_END_SEPARATOR (0x1000)
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#define TEXT_IS_POSIX (0x2000)
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/* Internal ACL representation. */
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struct __acl_t
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{
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uint64_t magic; /* Must be ACL_MAGIC. */
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uint16_t max_count; /* Max. number of entries. */
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uint16_t count; /* Number of used entries. */
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uint16_t deleted; /* Number of used but deleted entries. */
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uint16_t next; /* Next entry to be returned by acl_get_entry. */
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aclent_t *entry; /* Pointer to variable array of ACL entries. */
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};
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inline acl_entry_t
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__to_entry (acl_t acl, uint16_t idx)
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{
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2020-07-10 03:17:03 +08:00
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return ((uint64_t) idx << 48) | (uint64_t) ((uintptr_t) acl);
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2016-01-07 01:41:36 +08:00
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}
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#define __to_permset(a,i) ((acl_permset_t)__to_entry((a),(i)))
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inline acl_t
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__from_entry (acl_entry_t entry_d, uint16_t &idx)
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{
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idx = entry_d >> 48;
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acl_t acl = (acl_t) (entry_d & ~((uint64_t) 0xffff << 48));
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if (acl->magic != ACL_MAGIC)
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return NULL;
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if (idx >= acl->count)
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return NULL;
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if (acl->entry[idx].a_type == ACL_DELETED_TAG)
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return NULL;
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return acl;
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}
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#define __from_permset(p,i) __from_entry((acl_permset_t)(p),(i))
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/* External (but opaque) ACL representation. */
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struct __acl_ext_t
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{
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uint16_t count; /* Number of used entries. */
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aclent_t entry[0]; /* Variable array of ACL entries. */
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};
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/* Shared functions defined in sec_acl.cc. */
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mode_t __aclcalcmask (aclent_t *, int);
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int __aclsort (int, aclent_t *);
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int __aclcheck (aclent_t *, int, int *, bool);
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char *__acltotext (aclent_t *, int, const char *, char, int);
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void *__aclfromtext (const char *, int *, bool);
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