1078 lines
20 KiB
C++
1078 lines
20 KiB
C++
/* sec_posixacl.cc: POSIX ACL functions based on Solaris 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 "winsup.h"
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#include <unistd.h>
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#include "cygerrno.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "tls_pbuf.h"
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#include "sec_posixacl.h"
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#include <acl/libacl.h>
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#define _ENTRY_SIZE(_cnt) ((_cnt) * sizeof (aclent_t))
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#define _ACL_SIZE(_cnt) (sizeof (__acl_ext_t) + _ENTRY_SIZE (_cnt))
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#define ACL_SIZE(_acl) ({ acl_t __acl = _acl; \
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_ACL_SIZE((__acl)->count - (__acl)->deleted); \
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})
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#define ACL_PERM_MASK (ACL_READ | ACL_WRITE | ACL_EXECUTE)
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extern "C" acl_t
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acl_init (int count)
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{
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acl_t acl;
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if (count < 0 || count > UINT16_MAX)
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{
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set_errno (EINVAL);
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return NULL;
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}
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acl = (acl_t) calloc (1, sizeof (__acl_t));
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if (!acl)
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return NULL;
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acl->entry = (aclent_t *) calloc (count, sizeof (aclent_t));
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if (!acl->entry)
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{
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free (acl);
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return NULL;
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}
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acl->magic = ACL_MAGIC;
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acl->max_count = count;
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return acl;
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}
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extern "C" acl_t
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acl_dup (acl_t acl)
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{
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__try
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{
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acl_t new_acl = acl_init (acl->max_count);
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if (new_acl)
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{
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uint16_t new_idx = 0;
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for (uint16_t idx = 0; idx < acl->count; ++idx)
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if (acl->entry[idx].a_type != ACL_DELETED_TAG)
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new_acl->entry[new_idx++] = acl->entry[idx];
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new_acl->magic = ACL_MAGIC;
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new_acl->count = new_idx;
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return new_acl;
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}
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}
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__except (EINVAL) {}
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__endtry
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return NULL;
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}
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extern "C" int
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acl_free (void *obj_p)
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{
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__try
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{
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acl_t acl;
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if (obj_p)
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{
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if (malloc_usable_size (obj_p) >= sizeof (__acl_t))
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{
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acl = (acl_t) obj_p;
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if (acl->magic == ACL_MAGIC)
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free (acl->entry);
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}
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free (obj_p);
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_valid (acl_t acl)
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{
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__try
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{
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if (!(__aclcheck (acl->entry, acl->count, NULL, true)))
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return 0;
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_copy_entry (acl_entry_t dest_d, acl_entry_t src_d)
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{
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__try
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{
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uint16_t d_idx, s_idx;
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acl_t d_acl, s_acl;
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d_acl = __from_entry (dest_d, d_idx);
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s_acl = __from_entry (src_d, s_idx);
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if (d_acl && s_acl)
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{
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d_acl->entry[d_idx] = s_acl->entry[s_idx];
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_create_entry (acl_t *acl_p, acl_entry_t *entry_p)
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{
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__try
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{
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acl_t acl = *acl_p;
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uint16_t idx;
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if (acl->deleted > 0)
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{
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for (idx = 0; idx < acl->count; ++idx)
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if (acl->entry[idx].a_type == ACL_DELETED_TAG)
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{
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*entry_p = __to_entry (acl, idx);
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--acl->deleted;
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goto fill_entry;
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}
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}
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if (acl->count >= acl->max_count)
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{
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aclent_t *new_e;
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new_e = (aclent_t *) realloc (acl->entry,
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_ENTRY_SIZE (acl->max_count + 1));
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if (!new_e)
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__leave;
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acl->entry = new_e;
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++acl->max_count;
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}
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idx = acl->count++;
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*entry_p = __to_entry (acl, idx);
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fill_entry:
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acl->entry[idx].a_type = ACL_UNDEFINED_TAG;
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acl->entry[idx].a_id = ACL_UNDEFINED_ID;
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acl->entry[idx].a_perm = 0;
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return 0;
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_delete_entry (acl_t acl, acl_entry_t entry_d)
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{
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__try
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{
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acl_t acl_p;
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uint16_t idx;
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acl_p = __from_entry (entry_d, idx);
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if (acl_p == acl)
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{
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acl_p->entry[idx].a_type = ACL_DELETED_TAG;
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acl_p->entry[idx].a_id = ACL_UNDEFINED_ID;
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acl_p->entry[idx].a_perm = 0;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_get_entry (acl_t acl, int entry_id, acl_entry_t *entry_p)
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{
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__try
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{
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uint16_t idx;
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if (entry_id == ACL_FIRST_ENTRY)
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acl->next = 0;
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else if (entry_id != ACL_NEXT_ENTRY)
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{
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set_errno (EINVAL);
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__leave;
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}
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do
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{
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if (acl->next >= acl->count)
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return 0;
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idx = acl->next++;
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}
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while (acl->entry[idx].a_type == ACL_DELETED_TAG);
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*entry_p = __to_entry (acl, idx);
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return 1;
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_calc_mask (acl_t *acl_p)
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{
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__try
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{
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acl_t acl = *acl_p;
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mode_t mask = 0;
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mask = __aclcalcmask (acl->entry, acl->count);
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/* If __aclcalcmask returns -1 we're done. Otherwise create a
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mask entry here. */
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if (mask != (acl_perm_t) -1)
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{
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acl_entry_t entry_d;
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uint16_t mask_idx;
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if (acl_create_entry (&acl, &entry_d) < 0)
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__leave;
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if (!__from_entry (entry_d, mask_idx))
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{
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set_errno (EINVAL);
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__leave;
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}
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acl->entry[mask_idx].a_type = ACL_MASK;
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acl->entry[mask_idx].a_id = ACL_UNDEFINED_ID;
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acl->entry[mask_idx].a_perm = mask;
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*acl_p = acl;
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}
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return 0;
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_clear_perms (acl_permset_t permset_d)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_permset (permset_d, idx);
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if (acl)
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{
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acl->entry[idx].a_perm = 0;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_add_perm (acl_permset_t permset_d, acl_perm_t perm)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_permset (permset_d, idx);
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if (acl && !(perm & ~ACL_PERM_MASK))
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{
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acl->entry[idx].a_perm |= perm;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_delete_perm (acl_permset_t permset_d, acl_perm_t perm)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_permset (permset_d, idx);
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if (acl && !(perm & ~ACL_PERM_MASK))
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{
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acl->entry[idx].a_perm &= ~perm;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_get_permset (acl_entry_t entry_d, acl_permset_t *permset_p)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_entry (entry_d, idx);
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if (acl)
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{
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*permset_p = (acl_permset_t) entry_d;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_set_permset (acl_entry_t entry_d, acl_permset_t permset_d)
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{
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__try
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{
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acl_t acl_e, acl_p;
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uint16_t idx_e, idx_p;
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acl_e = __from_entry (entry_d, idx_e);
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acl_p = __from_permset (permset_d, idx_p);
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if (acl_e && acl_p && !(acl_p->entry[idx_p].a_perm & ~ACL_PERM_MASK))
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{
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acl_e->entry[idx_e].a_perm = acl_p->entry[idx_p].a_perm;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" void *
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acl_get_qualifier (acl_entry_t entry_d)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_entry (entry_d, idx);
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if (acl && (acl->entry[idx].a_type & (ACL_USER | ACL_GROUP)))
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{
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id_t *id = (id_t *) malloc (sizeof (id_t));
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if (id)
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{
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*id = acl->entry[idx].a_id;
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return (void *) id;
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}
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}
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else
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return NULL;
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}
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extern "C" int
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acl_set_qualifier (acl_entry_t entry_d, const void *qualifier_p)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_entry (entry_d, idx);
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if (acl && (acl->entry[idx].a_type & (ACL_USER | ACL_GROUP)))
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{
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acl->entry[idx].a_id = *(id_t *) qualifier_p;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_get_tag_type (acl_entry_t entry_d, acl_tag_t *tag_type_p)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_entry (entry_d, idx);
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if (acl)
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{
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*tag_type_p = acl->entry[idx].a_type;
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return 0;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" int
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acl_set_tag_type (acl_entry_t entry_d, acl_tag_t tag_type)
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{
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__try
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{
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acl_t acl;
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uint16_t idx;
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acl = __from_entry (entry_d, idx);
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if (acl)
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switch (tag_type)
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{
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case ACL_USER_OBJ:
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case ACL_GROUP_OBJ:
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case ACL_MASK:
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case ACL_OTHER:
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acl->entry[idx].a_id = ACL_UNDEFINED_ID;
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fallthrough;
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case ACL_USER:
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case ACL_GROUP:
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acl->entry[idx].a_type = tag_type;
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return 0;
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default:
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break;
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}
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set_errno (EINVAL);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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extern "C" ssize_t
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acl_size (acl_t acl)
|
|
{
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__try
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|
{
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return (ssize_t) ACL_SIZE (acl);
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}
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__except (EINVAL) {}
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__endtry
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return -1;
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}
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|
|
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extern "C" ssize_t
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acl_copy_ext (void *buf_p, acl_t acl, ssize_t size)
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|
{
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__try
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|
{
|
|
ssize_t ext_size = (ssize_t) ACL_SIZE (acl);
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|
|
|
if (size <= 0)
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set_errno (EINVAL);
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else if (ext_size > size)
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set_errno (ERANGE);
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else
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{
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uint16_t ext_idx = 0;
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__acl_ext_t *acl_ext = (__acl_ext_t *) buf_p;
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|
|
acl_ext->count = acl->count - acl->deleted;
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for (uint16_t idx = 0; idx < acl->count; ++idx)
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if (acl->entry[idx].a_type != ACL_DELETED_TAG)
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acl_ext->entry[ext_idx++] = acl->entry[idx];
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return ext_size;
|
|
}
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return -1;
|
|
}
|
|
|
|
extern "C" acl_t
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acl_copy_int (const void *buf_p)
|
|
{
|
|
__try
|
|
{
|
|
acl_t acl;
|
|
__acl_ext_t *acl_ext = (__acl_ext_t *) buf_p;
|
|
|
|
acl = acl_init (acl_ext->count);
|
|
if (acl)
|
|
{
|
|
memcpy (acl->entry, acl_ext->entry, _ENTRY_SIZE (acl_ext->count));
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|
acl->count = acl_ext->count;
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|
return acl;
|
|
}
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return NULL;
|
|
}
|
|
|
|
extern "C" acl_t
|
|
acl_from_text (const char *buf_p)
|
|
{
|
|
__try
|
|
{
|
|
return (acl_t) __aclfromtext (buf_p, NULL, true);
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return NULL;
|
|
}
|
|
|
|
extern "C" char *
|
|
acl_to_text (acl_t acl, ssize_t *len_p)
|
|
{
|
|
__try
|
|
{
|
|
char *ret = __acltotext (acl->entry, acl->count, NULL, '\n',
|
|
TEXT_IS_POSIX
|
|
| TEXT_SOME_EFFECTIVE
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|
| TEXT_END_SEPARATOR);
|
|
if (ret && len_p)
|
|
*len_p = strlen (ret);
|
|
return ret;
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return NULL;
|
|
}
|
|
|
|
acl_t __reg2
|
|
fhandler_base::acl_get (acl_type_t type)
|
|
{
|
|
set_errno (ENOTSUP);
|
|
return NULL;
|
|
}
|
|
|
|
acl_t __reg2
|
|
fhandler_disk_file::acl_get (acl_type_t type)
|
|
{
|
|
acl_t acl = NULL;
|
|
int oret = 0;
|
|
|
|
__try
|
|
{
|
|
tmp_pathbuf tp;
|
|
aclent_t *aclbufp;
|
|
uint16_t cnt, access_cnt;
|
|
|
|
if (!pc.has_acls ())
|
|
{
|
|
set_errno (ENOTSUP);
|
|
__leave;
|
|
}
|
|
if (type == ACL_TYPE_DEFAULT && !pc.isdir ())
|
|
{
|
|
set_errno (ENOTDIR);
|
|
__leave;
|
|
}
|
|
aclbufp = (aclent_t *) tp.c_get ();
|
|
if (!get_handle ())
|
|
{
|
|
query_open (query_read_control);
|
|
if (!(oret = open (O_BINARY, 0)))
|
|
__leave;
|
|
}
|
|
cnt = facl (GETACL, MAX_ACL_ENTRIES, aclbufp);
|
|
if (cnt < 0)
|
|
__leave;
|
|
/* Set access_cnt to number of non-default entries from file ACL. */
|
|
if (!pc.isdir ())
|
|
access_cnt = cnt;
|
|
else
|
|
for (access_cnt = 0; access_cnt < cnt; ++access_cnt)
|
|
if (aclbufp[access_cnt].a_type & ACL_DEFAULT)
|
|
break;
|
|
if (type == ACL_TYPE_ACCESS)
|
|
{
|
|
acl = acl_init (access_cnt);
|
|
if (!acl)
|
|
__leave;
|
|
memcpy (acl->entry, aclbufp, _ENTRY_SIZE (access_cnt));
|
|
acl->count = access_cnt;
|
|
}
|
|
else
|
|
{
|
|
cnt -= access_cnt;
|
|
acl = acl_init (cnt);
|
|
if (acl && cnt)
|
|
{
|
|
memcpy (acl->entry, aclbufp + access_cnt, _ENTRY_SIZE (cnt));
|
|
acl->count = cnt;
|
|
for (cnt = 0; cnt < acl->count; ++cnt)
|
|
acl->entry[cnt].a_type &= ~ACL_DEFAULT;
|
|
}
|
|
}
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
if (oret)
|
|
close_fs ();
|
|
return acl;
|
|
}
|
|
|
|
extern "C" acl_t
|
|
acl_get_fd (int fd)
|
|
{
|
|
cygheap_fdget cfd (fd);
|
|
if (cfd < 0)
|
|
return NULL;
|
|
return cfd->acl_get (ACL_TYPE_ACCESS);
|
|
}
|
|
|
|
extern "C" acl_t
|
|
acl_get_file (const char *path_p, acl_type_t type)
|
|
{
|
|
if (type != ACL_TYPE_ACCESS && type != ACL_TYPE_DEFAULT)
|
|
{
|
|
set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
fhandler_base *fh;
|
|
if (!(fh = build_fh_name (path_p, PC_SYM_FOLLOW, stat_suffixes)))
|
|
return NULL;
|
|
if (fh->error ())
|
|
{
|
|
set_errno (fh->error ());
|
|
return NULL;
|
|
}
|
|
acl_t acl = fh->acl_get (type);
|
|
delete fh;
|
|
return acl;
|
|
}
|
|
|
|
int __reg3
|
|
fhandler_base::acl_set (acl_t acl, acl_type_t type)
|
|
{
|
|
set_errno (ENOTSUP);
|
|
return -1;
|
|
}
|
|
|
|
int __reg3
|
|
fhandler_disk_file::acl_set (acl_t acl, acl_type_t type)
|
|
{
|
|
int ret = -1;
|
|
int oret = 0;
|
|
|
|
__try
|
|
{
|
|
tmp_pathbuf tp;
|
|
aclent_t *aclbufp, *aclbuf_from_file;
|
|
uint16_t cnt, cnt_from_file, access_cnt;
|
|
|
|
if (!pc.has_acls ())
|
|
{
|
|
set_errno (ENOTSUP);
|
|
__leave;
|
|
}
|
|
if (type == ACL_TYPE_DEFAULT && !pc.isdir ())
|
|
{
|
|
set_errno (ENOTDIR);
|
|
__leave;
|
|
}
|
|
if (acl->count > MAX_ACL_ENTRIES)
|
|
{
|
|
set_errno (EINVAL);
|
|
__leave;
|
|
}
|
|
aclbuf_from_file = (aclent_t *) tp.c_get ();
|
|
if (!get_handle ())
|
|
{
|
|
query_open (query_write_dac);
|
|
if (!(oret = open (O_BINARY, 0)))
|
|
__leave;
|
|
}
|
|
cnt_from_file = facl (GETACL, MAX_ACL_ENTRIES, aclbuf_from_file);
|
|
if (cnt_from_file < 0)
|
|
__leave;
|
|
aclbufp = (aclent_t *) tp.c_get ();
|
|
/* Set access_cnt to number of non-default entries from file ACL. */
|
|
if (!pc.isdir ())
|
|
access_cnt = cnt_from_file;
|
|
else
|
|
for (access_cnt = 0; access_cnt < cnt_from_file; ++access_cnt)
|
|
if (aclbuf_from_file[access_cnt].a_type & ACL_DEFAULT)
|
|
break;
|
|
if (type == ACL_TYPE_ACCESS)
|
|
{
|
|
/* Check if the number of ACEs fits into the buffer. */
|
|
if (acl->count - acl->deleted + cnt_from_file - access_cnt
|
|
> MAX_ACL_ENTRIES)
|
|
{
|
|
set_errno (EINVAL);
|
|
__leave;
|
|
}
|
|
/* Copy the new ACL entries. */
|
|
cnt = 0;
|
|
for (uint16_t idx = 0; idx < acl->count; ++idx)
|
|
if (acl->entry[idx].a_type != ACL_DELETED_TAG)
|
|
aclbufp[cnt++] = acl->entry[idx];
|
|
/* Append default ACL from file, if any. */
|
|
if (access_cnt < cnt_from_file)
|
|
{
|
|
memcpy (aclbufp + cnt, aclbuf_from_file + access_cnt,
|
|
_ENTRY_SIZE (cnt_from_file - access_cnt));
|
|
cnt += cnt_from_file - access_cnt;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Check if the number of ACEs fits into the buffer. */
|
|
if (acl->count - acl->deleted + access_cnt > MAX_ACL_ENTRIES)
|
|
{
|
|
set_errno (EINVAL);
|
|
__leave;
|
|
}
|
|
/* Copy non-default entries from file. */
|
|
memcpy (aclbufp, aclbuf_from_file, _ENTRY_SIZE (access_cnt));
|
|
cnt = access_cnt;
|
|
/* Append new default ACL entries (and add ACL_DEFAULT flag). */
|
|
for (uint16_t idx = 0; idx < acl->count; ++idx)
|
|
if (acl->entry[idx].a_type != ACL_DELETED_TAG)
|
|
{
|
|
aclbufp[cnt] = acl->entry[idx];
|
|
aclbufp[cnt++].a_type |= ACL_DEFAULT;
|
|
}
|
|
}
|
|
ret = facl (SETACL, cnt, aclbufp);
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
if (oret)
|
|
close_fs ();
|
|
return ret;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_set_fd (int fd, acl_t acl)
|
|
{
|
|
cygheap_fdget cfd (fd);
|
|
if (cfd < 0)
|
|
return -1;
|
|
return cfd->acl_set (acl, ACL_TYPE_ACCESS);
|
|
}
|
|
|
|
extern "C" int
|
|
acl_set_file(const char *path_p, acl_type_t type, acl_t acl)
|
|
{
|
|
if (type != ACL_TYPE_ACCESS && type != ACL_TYPE_DEFAULT)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
fhandler_base *fh;
|
|
if (!(fh = build_fh_name (path_p, PC_SYM_FOLLOW, stat_suffixes)))
|
|
return -1;
|
|
if (fh->error ())
|
|
{
|
|
set_errno (fh->error ());
|
|
return -1;
|
|
}
|
|
int ret = fh->acl_set (acl, type);
|
|
delete fh;
|
|
return ret;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_delete_def_file (const char *path_p)
|
|
{
|
|
acl_t acl = (acl_t) alloca (sizeof (struct __acl_t));
|
|
acl->count = acl->max_count = acl->next = 0;
|
|
if (!acl)
|
|
return -1;
|
|
return acl_set_file(path_p, ACL_TYPE_DEFAULT, acl);
|
|
}
|
|
|
|
/* libacl extensions */
|
|
|
|
extern "C" int
|
|
acl_check (acl_t acl, int *last)
|
|
{
|
|
|
|
__try
|
|
{
|
|
int ret = 0;
|
|
|
|
if (acl->count != 0)
|
|
{
|
|
ret = __aclcheck (acl->entry, acl->count, last, true);
|
|
switch (ret)
|
|
{
|
|
case GRP_ERROR:
|
|
case USER_ERROR:
|
|
case CLASS_ERROR:
|
|
case OTHER_ERROR:
|
|
ret = ACL_MULTI_ERROR;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return -1;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_cmp (acl_t acl1, acl_t acl2)
|
|
{
|
|
int ret = -1;
|
|
|
|
__try
|
|
{
|
|
tmp_pathbuf tp;
|
|
|
|
__acl_ext_t *acl1d = (__acl_ext_t *) tp.c_get ();
|
|
__acl_ext_t *acl2d = (__acl_ext_t *) tp.c_get ();
|
|
if (acl_copy_ext (acl1d, acl1, NT_MAX_PATH) < 0)
|
|
__leave;
|
|
if (acl_copy_ext (acl2d, acl2, NT_MAX_PATH) < 0)
|
|
__leave;
|
|
if (acl1d->count != acl2d->count)
|
|
return 1;
|
|
if (__aclsort (acl1d->count, acl1d->entry))
|
|
__leave;
|
|
if (__aclsort (acl2d->count, acl2d->entry))
|
|
__leave;
|
|
for (int idx = 0; idx < acl1d->count; ++idx)
|
|
{
|
|
if (acl1d->entry[idx].a_type != acl2d->entry[idx].a_type)
|
|
{
|
|
ret = 1;
|
|
__leave;
|
|
}
|
|
if ((acl1d->entry[idx].a_perm & ACL_PERM_MASK)
|
|
!= (acl2d->entry[idx].a_perm & ACL_PERM_MASK))
|
|
{
|
|
ret = 1;
|
|
__leave;
|
|
}
|
|
if ((acl1d->entry[idx].a_type & (ACL_USER | ACL_GROUP))
|
|
&& acl1d->entry[idx].a_id != acl2d->entry[idx].a_id)
|
|
{
|
|
ret = 1;
|
|
__leave;
|
|
}
|
|
}
|
|
ret = 0;
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return ret;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_entries (acl_t acl)
|
|
{
|
|
__try
|
|
{
|
|
return acl->count - acl->deleted;
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return -1;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_equiv_mode (acl_t acl, mode_t *mode_p)
|
|
{
|
|
__try
|
|
{
|
|
if (acl->count != 3)
|
|
{
|
|
set_errno (EINVAL);
|
|
__leave;
|
|
}
|
|
int u_idx = -1, g_idx = -1, o_idx = -1;
|
|
for (int idx = 0; idx < 3; ++idx)
|
|
switch (acl->entry[idx].a_type)
|
|
{
|
|
case ACL_USER_OBJ:
|
|
u_idx = idx;
|
|
break;
|
|
case ACL_GROUP_OBJ:
|
|
g_idx = idx;
|
|
break;
|
|
case ACL_OTHER:
|
|
o_idx = idx;
|
|
break;
|
|
}
|
|
if (u_idx == -1 || g_idx == -1 || o_idx == -1)
|
|
{
|
|
set_errno (EINVAL);
|
|
__leave;
|
|
}
|
|
if (mode_p)
|
|
*mode_p = ((acl->entry[u_idx].a_perm & ACL_PERM_MASK) << 6)
|
|
| ((acl->entry[g_idx].a_perm & ACL_PERM_MASK) << 3)
|
|
| (acl->entry[o_idx].a_perm & ACL_PERM_MASK);
|
|
return 0;
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return -1;
|
|
}
|
|
|
|
static const char *acl_err_txt[] =
|
|
{
|
|
"Multiple entries",
|
|
"Duplicate entries",
|
|
"Invalid entry type",
|
|
"Missing or wrong entry"
|
|
};
|
|
|
|
extern "C" const char *
|
|
acl_error (int code)
|
|
{
|
|
if (code < ACL_MULTI_ERROR || code > ACL_MISS_ERROR)
|
|
return NULL;
|
|
return acl_err_txt[code - ACL_MULTI_ERROR];
|
|
}
|
|
|
|
static int
|
|
__acl_extended_fh (fhandler_base *fh)
|
|
{
|
|
int ret = -1;
|
|
|
|
if (!fh->pc.has_acls ())
|
|
set_errno (ENOTSUP);
|
|
else
|
|
{
|
|
ret = fh->facl (GETACLCNT, 0, NULL);
|
|
if (ret >= 0)
|
|
ret = (ret > MIN_ACL_ENTRIES) ? 1 : 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_extended_fd (int fd)
|
|
{
|
|
__try
|
|
{
|
|
cygheap_fdget cfd (fd);
|
|
if (cfd < 0)
|
|
__leave;
|
|
return __acl_extended_fh (cfd);
|
|
}
|
|
__except (EBADF) {}
|
|
__endtry
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
__acl_extended_file (path_conv &pc)
|
|
{
|
|
int ret = -1;
|
|
|
|
__try
|
|
{
|
|
if (pc.error)
|
|
set_errno (pc.error);
|
|
else if (!pc.exists ())
|
|
set_errno (ENOENT);
|
|
else
|
|
{
|
|
fhandler_base *fh;
|
|
|
|
if (!(fh = build_fh_pc (pc)))
|
|
__leave;
|
|
ret = __acl_extended_fh (fh);
|
|
delete fh;
|
|
}
|
|
}
|
|
__except (EFAULT) {}
|
|
__endtry
|
|
return ret;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_extended_file (const char *path_p)
|
|
{
|
|
path_conv pc (path_p, PC_SYM_FOLLOW | PC_POSIX | PC_KEEP_HANDLE,
|
|
stat_suffixes);
|
|
return __acl_extended_file (pc);
|
|
}
|
|
|
|
extern "C" int
|
|
acl_extended_file_nofollow (const char *path_p)
|
|
{
|
|
path_conv pc (path_p, PC_SYM_NOFOLLOW | PC_POSIX | PC_KEEP_HANDLE,
|
|
stat_suffixes);
|
|
return __acl_extended_file (pc);
|
|
}
|
|
|
|
extern "C" acl_t
|
|
acl_from_mode (mode_t mode)
|
|
{
|
|
acl_t acl = acl_init (MIN_ACL_ENTRIES);
|
|
if (!acl)
|
|
return NULL;
|
|
acl->count = 3;
|
|
acl->entry[0].a_type = USER_OBJ;
|
|
acl->entry[0].a_id = ACL_UNDEFINED_ID;
|
|
acl->entry[0].a_perm = (mode >> 6) & ACL_PERM_MASK;
|
|
acl->entry[1].a_type = GROUP_OBJ;
|
|
acl->entry[1].a_id = ACL_UNDEFINED_ID;
|
|
acl->entry[1].a_perm = (mode >> 3) & ACL_PERM_MASK;
|
|
acl->entry[2].a_type = OTHER_OBJ;
|
|
acl->entry[2].a_id = ACL_UNDEFINED_ID;
|
|
acl->entry[2].a_perm = mode & ACL_PERM_MASK;
|
|
return acl;
|
|
}
|
|
|
|
extern "C" int
|
|
acl_get_perm (acl_permset_t permset_d, acl_perm_t perm)
|
|
{
|
|
__try
|
|
{
|
|
acl_t acl;
|
|
uint16_t idx;
|
|
|
|
acl = __from_permset (permset_d, idx);
|
|
if (acl && !(perm & ~ACL_PERM_MASK))
|
|
return (~acl->entry[idx].a_perm & perm) ? 0 : 1;
|
|
set_errno (EINVAL);
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return -1;
|
|
}
|
|
|
|
extern "C" char *
|
|
acl_to_any_text (acl_t acl, const char *prefix, char separator, int options)
|
|
{
|
|
__try
|
|
{
|
|
return __acltotext (acl->entry, acl->count, prefix, separator,
|
|
TEXT_IS_POSIX | options);
|
|
}
|
|
__except (EINVAL) {}
|
|
__endtry
|
|
return NULL;
|
|
}
|