-/* Test whether a file has a nontrivial access control list.
+/* Test whether a file has a nontrivial ACL. -*- coding: utf-8 -*-
- Copyright (C) 2002-2003, 2005-2013 Free Software Foundation, Inc.
+ Copyright (C) 2002-2003, 2005-2015 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
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 */
}
return got_one;
-# else /* IRIX, Tru64 */
-# if HAVE_ACL_TO_SHORT_TEXT /* IRIX */
+# elif HAVE_ACL_TO_SHORT_TEXT /* IRIX */
/* Don't use acl_get_entry: it is undocumented. */
int count = acl->acl_cnt;
}
return 0;
-# endif
-# if HAVE_ACL_FREE_TEXT /* Tru64 */
+# 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;
}
return 0;
-# endif
+# else
+
+ errno = ENOSYS;
+ return -1;
# endif
}
-# endif
+int
+acl_default_nontrivial (acl_t acl)
+{
+ /* acl is non-trivial if it is non-empty. */
+ return (acl_entries (acl) > 0);
+}
+# endif
#elif USE_ACL && HAVE_FACL && defined GETACL /* Solaris, Cygwin, not 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)
+acl_nontrivial (int count, struct acl_entry *entries)
{
int i;
+ if (count > 3)
+ return 1;
+
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;
+ if (ace->uid != ACL_NSUSER && ace->gid != ACL_NSGROUP)
+ 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)
+void
+free_permission_context (struct permission_context *ctx)
{
-#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;
+#ifdef USE_ACL
+# if HAVE_ACL_GET_FILE /* Linux, FreeBSD, Mac OS X, IRIX, Tru64 */
+ if (ctx->acl)
+ acl_free (ctx->acl);
+# if !HAVE_ACL_TYPE_EXTENDED
+ if (ctx->default_acl)
+ acl_free (ctx->default_acl);
# 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;
+# elif defined GETACL /* Solaris, Cygwin */
+ free (ctx->entries);
+# ifdef ACE_GETACL
+ free (ctx->ace_entries);
# 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);
- }
- }
-
+# if HAVE_ACLV_H
# 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;
}
projects / platform / upstream / gettext.git / blobdiff