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emacs/lib/file-has-acl.c

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/* Test whether a file has a nontrivial access control list.
Copyright (C) 2002-2003, 2005-2014 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Written by Paul Eggert, Andreas Grünbacher, and Bruno Haible. */
/* Without this pragma, gcc 4.7.0 20120126 may suggest that the
file_has_acl function might be candidate for attribute 'const' */
#if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
# pragma GCC diagnostic ignored "-Wsuggest-attribute=const"
#endif
#include <config.h>
#include "acl.h"
#include "acl-internal.h"
#if USE_ACL && HAVE_ACL_GET_FILE
# if HAVE_ACL_TYPE_EXTENDED /* Mac OS X */
/* ACL is an ACL, from a file, stored as type ACL_TYPE_EXTENDED.
Return 1 if the given ACL is non-trivial.
Return 0 if it is trivial. */
int
acl_extended_nontrivial (acl_t acl)
{
/* acl is non-trivial if it is non-empty. */
return (acl_entries (acl) > 0);
}
# else /* Linux, FreeBSD, IRIX, Tru64 */
/* ACL is an ACL, from a file, stored as type ACL_TYPE_ACCESS.
Return 1 if the given ACL is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.
Return -1 and set errno upon failure to determine it. */
int
acl_access_nontrivial (acl_t acl)
{
/* acl is non-trivial if it has some entries other than for "user::",
"group::", and "other::". Normally these three should be present
at least, allowing us to write
return (3 < acl_entries (acl));
but the following code is more robust. */
# if HAVE_ACL_FIRST_ENTRY /* Linux, FreeBSD */
acl_entry_t ace;
int got_one;
for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace);
got_one > 0;
got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace))
{
acl_tag_t tag;
if (acl_get_tag_type (ace, &tag) < 0)
return -1;
if (!(tag == ACL_USER_OBJ || tag == ACL_GROUP_OBJ || tag == ACL_OTHER))
return 1;
}
return got_one;
# elif HAVE_ACL_TO_SHORT_TEXT /* IRIX */
/* Don't use acl_get_entry: it is undocumented. */
int count = acl->acl_cnt;
int i;
for (i = 0; i < count; i++)
{
acl_entry_t ace = &acl->acl_entry[i];
acl_tag_t tag = ace->ae_tag;
if (!(tag == ACL_USER_OBJ || tag == ACL_GROUP_OBJ
|| tag == ACL_OTHER_OBJ))
return 1;
}
return 0;
# elif HAVE_ACL_FREE_TEXT /* Tru64 */
/* Don't use acl_get_entry: it takes only one argument and does not work. */
int count = acl->acl_num;
acl_entry_t ace;
for (ace = acl->acl_first; count > 0; ace = ace->next, count--)
{
acl_tag_t tag;
acl_perm_t perm;
tag = ace->entry->acl_type;
if (!(tag == ACL_USER_OBJ || tag == ACL_GROUP_OBJ || tag == ACL_OTHER))
return 1;
perm = ace->entry->acl_perm;
/* On Tru64, perm can also contain non-standard bits such as
PERM_INSERT, PERM_DELETE, PERM_MODIFY, PERM_LOOKUP, ... */
if ((perm & ~(ACL_READ | ACL_WRITE | ACL_EXECUTE)) != 0)
return 1;
}
return 0;
# else
errno = ENOSYS;
return -1;
# endif
}
# endif
#elif USE_ACL && HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */
/* Test an ACL retrieved with GETACL.
Return 1 if the given ACL, consisting of COUNT entries, is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
int
acl_nontrivial (int count, aclent_t *entries)
{
int i;
for (i = 0; i < count; i++)
{
aclent_t *ace = &entries[i];
/* Note: If ace->a_type = USER_OBJ, ace->a_id is the st_uid from stat().
If ace->a_type = GROUP_OBJ, ace->a_id is the st_gid from stat().
We don't need to check ace->a_id in these cases. */
if (!(ace->a_type == USER_OBJ
|| ace->a_type == GROUP_OBJ
|| ace->a_type == OTHER_OBJ
/* Note: Cygwin does not return a CLASS_OBJ ("mask:") entry
sometimes. */
|| ace->a_type == CLASS_OBJ))
return 1;
}
return 0;
}
# ifdef ACE_GETACL
/* A shortcut for a bitmask. */
# define NEW_ACE_WRITEA_DATA (NEW_ACE_WRITE_DATA | NEW_ACE_APPEND_DATA)
/* Test an ACL retrieved with ACE_GETACL.
Return 1 if the given ACL, consisting of COUNT entries, is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
int
acl_ace_nontrivial (int count, ace_t *entries)
{
int i;
/* The flags in the ace_t structure changed in a binary incompatible way
when ACL_NO_TRIVIAL etc. were introduced in <sys/acl.h> version 1.15.
How to distinguish the two conventions at runtime?
In the old convention, usually three ACEs have a_flags = ACE_OWNER /
ACE_GROUP / ACE_OTHER, in the range 0x0100..0x0400. In the new
convention, these values are not used. */
int old_convention = 0;
for (i = 0; i < count; i++)
if (entries[i].a_flags & (OLD_ACE_OWNER | OLD_ACE_GROUP | OLD_ACE_OTHER))
{
old_convention = 1;
break;
}
if (old_convention)
/* Running on Solaris 10. */
for (i = 0; i < count; i++)
{
ace_t *ace = &entries[i];
/* Note:
If ace->a_flags = ACE_OWNER, ace->a_who is the st_uid from stat().
If ace->a_flags = ACE_GROUP, ace->a_who is the st_gid from stat().
We don't need to check ace->a_who in these cases. */
if (!(ace->a_type == OLD_ALLOW
&& (ace->a_flags == OLD_ACE_OWNER
|| ace->a_flags == OLD_ACE_GROUP
|| ace->a_flags == OLD_ACE_OTHER)))
return 1;
}
else
{
/* Running on Solaris 10 (newer version) or Solaris 11. */
unsigned int access_masks[6] =
{
0, /* owner@ deny */
0, /* owner@ allow */
0, /* group@ deny */
0, /* group@ allow */
0, /* everyone@ deny */
0 /* everyone@ allow */
};
for (i = 0; i < count; i++)
{
ace_t *ace = &entries[i];
unsigned int index1;
unsigned int index2;
if (ace->a_type == NEW_ACE_ACCESS_ALLOWED_ACE_TYPE)
index1 = 1;
else if (ace->a_type == NEW_ACE_ACCESS_DENIED_ACE_TYPE)
index1 = 0;
else
return 1;
if (ace->a_flags == NEW_ACE_OWNER)
index2 = 0;
else if (ace->a_flags == (NEW_ACE_GROUP | NEW_ACE_IDENTIFIER_GROUP))
index2 = 2;
else if (ace->a_flags == NEW_ACE_EVERYONE)
index2 = 4;
else
return 1;
access_masks[index1 + index2] |= ace->a_access_mask;
}
/* The same bit shouldn't be both allowed and denied. */
if (access_masks[0] & access_masks[1])
return 1;
if (access_masks[2] & access_masks[3])
return 1;
if (access_masks[4] & access_masks[5])
return 1;
/* Check minimum masks. */
if ((NEW_ACE_WRITE_NAMED_ATTRS
| NEW_ACE_WRITE_ATTRIBUTES
| NEW_ACE_WRITE_ACL
| NEW_ACE_WRITE_OWNER)
& ~ access_masks[1])
return 1;
access_masks[1] &= ~(NEW_ACE_WRITE_NAMED_ATTRS
| NEW_ACE_WRITE_ATTRIBUTES
| NEW_ACE_WRITE_ACL
| NEW_ACE_WRITE_OWNER);
if ((NEW_ACE_READ_NAMED_ATTRS
| NEW_ACE_READ_ATTRIBUTES
| NEW_ACE_READ_ACL
| NEW_ACE_SYNCHRONIZE)
& ~ access_masks[5])
return 1;
access_masks[5] &= ~(NEW_ACE_READ_NAMED_ATTRS
| NEW_ACE_READ_ATTRIBUTES
| NEW_ACE_READ_ACL
| NEW_ACE_SYNCHRONIZE);
/* Check the allowed or denied bits. */
switch ((access_masks[0] | access_masks[1])
& ~(NEW_ACE_READ_NAMED_ATTRS
| NEW_ACE_READ_ATTRIBUTES
| NEW_ACE_READ_ACL
| NEW_ACE_SYNCHRONIZE))
{
case 0:
case NEW_ACE_READ_DATA:
case NEW_ACE_WRITEA_DATA:
case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA:
case NEW_ACE_EXECUTE:
case NEW_ACE_READ_DATA | NEW_ACE_EXECUTE:
case NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE:
case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE:
break;
default:
return 1;
}
switch ((access_masks[2] | access_masks[3])
& ~(NEW_ACE_READ_NAMED_ATTRS
| NEW_ACE_READ_ATTRIBUTES
| NEW_ACE_READ_ACL
| NEW_ACE_SYNCHRONIZE))
{
case 0:
case NEW_ACE_READ_DATA:
case NEW_ACE_WRITEA_DATA:
case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA:
case NEW_ACE_EXECUTE:
case NEW_ACE_READ_DATA | NEW_ACE_EXECUTE:
case NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE:
case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE:
break;
default:
return 1;
}
switch ((access_masks[4] | access_masks[5])
& ~(NEW_ACE_WRITE_NAMED_ATTRS
| NEW_ACE_WRITE_ATTRIBUTES
| NEW_ACE_WRITE_ACL
| NEW_ACE_WRITE_OWNER))
{
case 0:
case NEW_ACE_READ_DATA:
case NEW_ACE_WRITEA_DATA:
case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA:
case NEW_ACE_EXECUTE:
case NEW_ACE_READ_DATA | NEW_ACE_EXECUTE:
case NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE:
case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE:
break;
default:
return 1;
}
/* Check that the NEW_ACE_WRITE_DATA and NEW_ACE_APPEND_DATA bits are
either both allowed or both denied. */
if (((access_masks[0] & NEW_ACE_WRITE_DATA) != 0)
!= ((access_masks[0] & NEW_ACE_APPEND_DATA) != 0))
return 1;
if (((access_masks[2] & NEW_ACE_WRITE_DATA) != 0)
!= ((access_masks[2] & NEW_ACE_APPEND_DATA) != 0))
return 1;
if (((access_masks[4] & NEW_ACE_WRITE_DATA) != 0)
!= ((access_masks[4] & NEW_ACE_APPEND_DATA) != 0))
return 1;
}
return 0;
}
# endif
#elif USE_ACL && HAVE_GETACL /* HP-UX */
/* Return 1 if the given ACL is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
int
acl_nontrivial (int count, struct acl_entry *entries, struct stat *sb)
{
int i;
for (i = 0; i < count; i++)
{
struct acl_entry *ace = &entries[i];
if (!((ace->uid == sb->st_uid && ace->gid == ACL_NSGROUP)
|| (ace->uid == ACL_NSUSER && ace->gid == sb->st_gid)
|| (ace->uid == ACL_NSUSER && ace->gid == ACL_NSGROUP)))
return 1;
}
return 0;
}
# if HAVE_ACLV_H /* HP-UX >= 11.11 */
/* Return 1 if the given ACL is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
int
aclv_nontrivial (int count, struct acl *entries)
{
int i;
for (i = 0; i < count; i++)
{
struct acl *ace = &entries[i];
/* Note: If ace->a_type = USER_OBJ, ace->a_id is the st_uid from stat().
If ace->a_type = GROUP_OBJ, ace->a_id is the st_gid from stat().
We don't need to check ace->a_id in these cases. */
if (!(ace->a_type == USER_OBJ /* no need to check ace->a_id here */
|| ace->a_type == GROUP_OBJ /* no need to check ace->a_id here */
|| ace->a_type == CLASS_OBJ
|| ace->a_type == OTHER_OBJ))
return 1;
}
return 0;
}
# endif
#elif USE_ACL && (HAVE_ACLX_GET || HAVE_STATACL) /* AIX */
/* Return 1 if the given ACL is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
int
acl_nontrivial (struct acl *a)
{
/* The normal way to iterate through an ACL is like this:
struct acl_entry *ace;
for (ace = a->acl_ext; ace != acl_last (a); ace = acl_nxt (ace))
{
struct ace_id *aei;
switch (ace->ace_type)
{
case ACC_PERMIT:
case ACC_DENY:
case ACC_SPECIFY:
...;
}
for (aei = ace->ace_id; aei != id_last (ace); aei = id_nxt (aei))
...
}
*/
return (acl_last (a) != a->acl_ext ? 1 : 0);
}
# if HAVE_ACLX_GET && defined ACL_AIX_WIP /* newer AIX */
/* Return 1 if the given ACL is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
int
acl_nfs4_nontrivial (nfs4_acl_int_t *a)
{
# if 1 /* let's try this first */
return (a->aclEntryN > 0 ? 1 : 0);
# else
int count = a->aclEntryN;
int i;
for (i = 0; i < count; i++)
{
nfs4_ace_int_t *ace = &a->aclEntry[i];
if (!((ace->flags & ACE4_ID_SPECIAL) != 0
&& (ace->aceWho.special_whoid == ACE4_WHO_OWNER
|| ace->aceWho.special_whoid == ACE4_WHO_GROUP
|| ace->aceWho.special_whoid == ACE4_WHO_EVERYONE)
&& ace->aceType == ACE4_ACCESS_ALLOWED_ACE_TYPE
&& ace->aceFlags == 0
&& (ace->aceMask & ~(ACE4_READ_DATA | ACE4_LIST_DIRECTORY
| ACE4_WRITE_DATA | ACE4_ADD_FILE
| ACE4_EXECUTE)) == 0))
return 1;
}
return 0;
# endif
}
# endif
#elif USE_ACL && HAVE_ACLSORT /* NonStop Kernel */
/* Test an ACL retrieved with ACL_GET.
Return 1 if the given ACL, consisting of COUNT entries, is non-trivial.
Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
int
acl_nontrivial (int count, struct acl *entries)
{
int i;
for (i = 0; i < count; i++)
{
struct acl *ace = &entries[i];
/* Note: If ace->a_type = USER_OBJ, ace->a_id is the st_uid from stat().
If ace->a_type = GROUP_OBJ, ace->a_id is the st_gid from stat().
We don't need to check ace->a_id in these cases. */
if (!(ace->a_type == USER_OBJ /* no need to check ace->a_id here */
|| ace->a_type == GROUP_OBJ /* no need to check ace->a_id here */
|| ace->a_type == CLASS_OBJ
|| ace->a_type == OTHER_OBJ))
return 1;
}
return 0;
}
#endif
/* Return 1 if NAME has a nontrivial access control list, 0 if NAME
only has no or a base access control list, and -1 (setting errno)
on error. SB must be set to the stat buffer of NAME, obtained
through stat() or lstat(). */
int
file_has_acl (char const *name, struct stat const *sb)
{
#if USE_ACL
if (! S_ISLNK (sb->st_mode))
{
# if HAVE_ACL_GET_FILE
/* POSIX 1003.1e (draft 17 -- abandoned) specific version. */
/* Linux, FreeBSD, Mac OS X, IRIX, Tru64 */
int ret;
if (HAVE_ACL_EXTENDED_FILE) /* Linux */
{
/* On Linux, acl_extended_file is an optimized function: It only
makes two calls to getxattr(), one for ACL_TYPE_ACCESS, one for
ACL_TYPE_DEFAULT. */
ret = acl_extended_file (name);
}
else /* FreeBSD, Mac OS X, IRIX, Tru64 */
{
# if HAVE_ACL_TYPE_EXTENDED /* Mac OS X */
/* On Mac OS X, acl_get_file (name, ACL_TYPE_ACCESS)
and acl_get_file (name, ACL_TYPE_DEFAULT)
always return NULL / EINVAL. There is no point in making
these two useless calls. The real ACL is retrieved through
acl_get_file (name, ACL_TYPE_EXTENDED). */
acl_t acl = acl_get_file (name, ACL_TYPE_EXTENDED);
if (acl)
{
ret = acl_extended_nontrivial (acl);
acl_free (acl);
}
else
ret = -1;
# else /* FreeBSD, IRIX, Tru64 */
acl_t acl = acl_get_file (name, ACL_TYPE_ACCESS);
if (acl)
{
int saved_errno;
ret = acl_access_nontrivial (acl);
saved_errno = errno;
acl_free (acl);
errno = saved_errno;
# if HAVE_ACL_FREE_TEXT /* Tru64 */
/* On OSF/1, acl_get_file (name, ACL_TYPE_DEFAULT) always
returns NULL with errno not set. There is no point in
making this call. */
# else /* FreeBSD, IRIX */
/* On Linux, FreeBSD, IRIX, acl_get_file (name, ACL_TYPE_ACCESS)
and acl_get_file (name, ACL_TYPE_DEFAULT) on a directory
either both succeed or both fail; it depends on the
file system. Therefore there is no point in making the second
call if the first one already failed. */
if (ret == 0 && S_ISDIR (sb->st_mode))
{
acl = acl_get_file (name, ACL_TYPE_DEFAULT);
if (acl)
{
ret = (0 < acl_entries (acl));
acl_free (acl);
}
else
ret = -1;
}
# endif
}
else
ret = -1;
# endif
}
if (ret < 0)
return - acl_errno_valid (errno);
return ret;
# elif HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */
# if defined ACL_NO_TRIVIAL
/* Solaris 10 (newer version), which has additional API declared in
<sys/acl.h> (acl_t) and implemented in libsec (acl_set, acl_trivial,
acl_fromtext, ...). */
return acl_trivial (name);
# else /* Solaris, Cygwin, general case */
/* Solaris 2.5 through Solaris 10, Cygwin, and contemporaneous versions
of Unixware. The acl() call returns the access and default ACL both
at once. */
{
/* Initially, try to read the entries into a stack-allocated buffer.
Use malloc if it does not fit. */
enum
{
alloc_init = 4000 / sizeof (aclent_t), /* >= 3 */
alloc_max = MIN (INT_MAX, SIZE_MAX / sizeof (aclent_t))
};
aclent_t buf[alloc_init];
size_t alloc = alloc_init;
aclent_t *entries = buf;
aclent_t *malloced = NULL;
int count;
for (;;)
{
count = acl (name, GETACL, alloc, entries);
if (count < 0 && errno == ENOSPC)
{
/* Increase the size of the buffer. */
free (malloced);
if (alloc > alloc_max / 2)
{
errno = ENOMEM;
return -1;
}
alloc = 2 * alloc; /* <= alloc_max */
entries = malloced =
(aclent_t *) malloc (alloc * sizeof (aclent_t));
if (entries == NULL)
{
errno = ENOMEM;
return -1;
}
continue;
}
break;
}
if (count < 0)
{
if (errno == ENOSYS || errno == ENOTSUP)
;
else
{
int saved_errno = errno;
free (malloced);
errno = saved_errno;
return -1;
}
}
else if (count == 0)
;
else
{
/* Don't use MIN_ACL_ENTRIES: It's set to 4 on Cygwin, but Cygwin
returns only 3 entries for files with no ACL. But this is safe:
If there are more than 4 entries, there cannot be only the
"user::", "group::", "other:", and "mask:" entries. */
if (count > 4)
{
free (malloced);
return 1;
}
if (acl_nontrivial (count, entries))
{
free (malloced);
return 1;
}
}
free (malloced);
}
# ifdef ACE_GETACL
/* Solaris also has a different variant of ACLs, used in ZFS and NFSv4
file systems (whereas the other ones are used in UFS file systems). */
{
/* Initially, try to read the entries into a stack-allocated buffer.
Use malloc if it does not fit. */
enum
{
alloc_init = 4000 / sizeof (ace_t), /* >= 3 */
alloc_max = MIN (INT_MAX, SIZE_MAX / sizeof (ace_t))
};
ace_t buf[alloc_init];
size_t alloc = alloc_init;
ace_t *entries = buf;
ace_t *malloced = NULL;
int count;
for (;;)
{
count = acl (name, ACE_GETACL, alloc, entries);
if (count < 0 && errno == ENOSPC)
{
/* Increase the size of the buffer. */
free (malloced);
if (alloc > alloc_max / 2)
{
errno = ENOMEM;
return -1;
}
alloc = 2 * alloc; /* <= alloc_max */
entries = malloced = (ace_t *) malloc (alloc * sizeof (ace_t));
if (entries == NULL)
{
errno = ENOMEM;
return -1;
}
continue;
}
break;
}
if (count < 0)
{
if (errno == ENOSYS || errno == EINVAL)
;
else
{
int saved_errno = errno;
free (malloced);
errno = saved_errno;
return -1;
}
}
else if (count == 0)
;
else
{
/* In the old (original Solaris 10) convention:
If there are more than 3 entries, there cannot be only the
ACE_OWNER, ACE_GROUP, ACE_OTHER entries.
In the newer Solaris 10 and Solaris 11 convention:
If there are more than 6 entries, there cannot be only the
ACE_OWNER, ACE_GROUP, ACE_EVERYONE entries, each once with
NEW_ACE_ACCESS_ALLOWED_ACE_TYPE and once with
NEW_ACE_ACCESS_DENIED_ACE_TYPE. */
if (count > 6)
{
free (malloced);
return 1;
}
if (acl_ace_nontrivial (count, entries))
{
free (malloced);
return 1;
}
}
free (malloced);
}
# endif
return 0;
# endif
# elif HAVE_GETACL /* HP-UX */
{
struct acl_entry entries[NACLENTRIES];
int count;
count = getacl (name, NACLENTRIES, entries);
if (count < 0)
{
/* ENOSYS is seen on newer HP-UX versions.
EOPNOTSUPP is typically seen on NFS mounts.
ENOTSUP was seen on Quantum StorNext file systems (cvfs). */
if (errno == ENOSYS || errno == EOPNOTSUPP || errno == ENOTSUP)
;
else
return -1;
}
else if (count == 0)
return 0;
else /* count > 0 */
{
if (count > NACLENTRIES)
/* If NACLENTRIES cannot be trusted, use dynamic memory
allocation. */
abort ();
/* If there are more than 3 entries, there cannot be only the
(uid,%), (%,gid), (%,%) entries. */
if (count > 3)
return 1;
{
struct stat statbuf;
if (stat (name, &statbuf) < 0)
return -1;
return acl_nontrivial (count, entries, &statbuf);
}
}
}
# if HAVE_ACLV_H /* HP-UX >= 11.11 */
{
struct acl entries[NACLVENTRIES];
int count;
count = acl ((char *) name, ACL_GET, NACLVENTRIES, entries);
if (count < 0)
{
/* EOPNOTSUPP is seen on NFS in HP-UX 11.11, 11.23.
EINVAL is seen on NFS in HP-UX 11.31. */
if (errno == ENOSYS || errno == EOPNOTSUPP || errno == EINVAL)
;
else
return -1;
}
else if (count == 0)
return 0;
else /* count > 0 */
{
if (count > NACLVENTRIES)
/* If NACLVENTRIES cannot be trusted, use dynamic memory
allocation. */
abort ();
/* If there are more than 4 entries, there cannot be only the
four base ACL entries. */
if (count > 4)
return 1;
return aclv_nontrivial (count, entries);
}
}
# endif
# elif HAVE_ACLX_GET && defined ACL_AIX_WIP /* AIX */
acl_type_t type;
char aclbuf[1024];
void *acl = aclbuf;
size_t aclsize = sizeof (aclbuf);
mode_t mode;
for (;;)
{
/* The docs say that type being 0 is equivalent to ACL_ANY, but it
is not true, in AIX 5.3. */
type.u64 = ACL_ANY;
if (aclx_get (name, 0, &type, aclbuf, &aclsize, &mode) >= 0)
break;
if (errno == ENOSYS)
return 0;
if (errno != ENOSPC)
{
if (acl != aclbuf)
{
int saved_errno = errno;
free (acl);
errno = saved_errno;
}
return -1;
}
aclsize = 2 * aclsize;
if (acl != aclbuf)
free (acl);
acl = malloc (aclsize);
if (acl == NULL)
{
errno = ENOMEM;
return -1;
}
}
if (type.u64 == ACL_AIXC)
{
int result = acl_nontrivial ((struct acl *) acl);
if (acl != aclbuf)
free (acl);
return result;
}
else if (type.u64 == ACL_NFS4)
{
int result = acl_nfs4_nontrivial ((nfs4_acl_int_t *) acl);
if (acl != aclbuf)
free (acl);
return result;
}
else
{
/* A newer type of ACL has been introduced in the system.
We should better support it. */
if (acl != aclbuf)
free (acl);
errno = EINVAL;
return -1;
}
# elif HAVE_STATACL /* older AIX */
union { struct acl a; char room[4096]; } u;
if (statacl (name, STX_NORMAL, &u.a, sizeof (u)) < 0)
return -1;
return acl_nontrivial (&u.a);
# elif HAVE_ACLSORT /* NonStop Kernel */
{
struct acl entries[NACLENTRIES];
int count;
count = acl ((char *) name, ACL_GET, NACLENTRIES, entries);
if (count < 0)
{
if (errno == ENOSYS || errno == ENOTSUP)
;
else
return -1;
}
else if (count == 0)
return 0;
else /* count > 0 */
{
if (count > NACLENTRIES)
/* If NACLENTRIES cannot be trusted, use dynamic memory
allocation. */
abort ();
/* If there are more than 4 entries, there cannot be only the
four base ACL entries. */
if (count > 4)
return 1;
return acl_nontrivial (count, entries);
}
}
# endif
}
#endif
return 0;
}
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