/* copy-acl.c - copy access control list from one file to another file
- Copyright (C) 2002-2003, 2005-2010 Free Software Foundation, Inc.
+ Copyright (C) 2002-2003, 2005-2013 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
#include "acl.h"
-#include "acl-internal.h"
+#include <errno.h>
+#include "quote.h"
+#include "error.h"
#include "gettext.h"
#define _(msgid) gettext (msgid)
If access control lists are not available, fchmod the target file to
MODE. Also sets the non-permission bits of the destination file
(S_ISUID, S_ISGID, S_ISVTX) to those from MODE if any are set.
- Return 0 if successful.
- Return -2 and set errno for an error relating to the source file.
- Return -1 and set errno for an error relating to the destination file. */
-
-static int
-qcopy_acl (const char *src_name, int source_desc, const char *dst_name,
- int dest_desc, mode_t mode)
-{
-#if USE_ACL && HAVE_ACL_GET_FILE
- /* POSIX 1003.1e (draft 17 -- abandoned) specific version. */
- /* Linux, FreeBSD, MacOS X, IRIX, Tru64 */
-# if MODE_INSIDE_ACL
- /* Linux, FreeBSD, IRIX, Tru64 */
-
- acl_t acl;
- int ret;
-
- if (HAVE_ACL_GET_FD && source_desc != -1)
- acl = acl_get_fd (source_desc);
- else
- acl = acl_get_file (src_name, ACL_TYPE_ACCESS);
- if (acl == NULL)
- {
- if (ACL_NOT_WELL_SUPPORTED (errno))
- return qset_acl (dst_name, dest_desc, mode);
- else
- return -2;
- }
-
- if (HAVE_ACL_SET_FD && dest_desc != -1)
- ret = acl_set_fd (dest_desc, acl);
- else
- ret = acl_set_file (dst_name, ACL_TYPE_ACCESS, acl);
- if (ret != 0)
- {
- int saved_errno = errno;
-
- if (ACL_NOT_WELL_SUPPORTED (errno) && !acl_access_nontrivial (acl))
- {
- acl_free (acl);
- return chmod_or_fchmod (dst_name, dest_desc, mode);
- }
- else
- {
- acl_free (acl);
- chmod_or_fchmod (dst_name, dest_desc, mode);
- errno = saved_errno;
- return -1;
- }
- }
- else
- acl_free (acl);
-
- if (mode & (S_ISUID | S_ISGID | S_ISVTX))
- {
- /* We did not call chmod so far, and either the mode and the ACL are
- separate or special bits are to be set which don't fit into ACLs. */
-
- if (chmod_or_fchmod (dst_name, dest_desc, mode) != 0)
- return -1;
- }
-
- if (S_ISDIR (mode))
- {
- acl = acl_get_file (src_name, ACL_TYPE_DEFAULT);
- if (acl == NULL)
- return -2;
-
- if (acl_set_file (dst_name, ACL_TYPE_DEFAULT, acl))
- {
- int saved_errno = errno;
-
- acl_free (acl);
- errno = saved_errno;
- return -1;
- }
- else
- acl_free (acl);
- }
- return 0;
-
-# else /* !MODE_INSIDE_ACL */
- /* MacOS X */
-
-# if !HAVE_ACL_TYPE_EXTENDED
-# error Must have ACL_TYPE_EXTENDED
-# endif
-
- /* On MacOS X, acl_get_file (name, ACL_TYPE_ACCESS)
- and acl_get_file (name, ACL_TYPE_DEFAULT)
- always return NULL / EINVAL. You have to use
- acl_get_file (name, ACL_TYPE_EXTENDED)
- or acl_get_fd (open (name, ...))
- to retrieve an ACL.
- On the other hand,
- acl_set_file (name, ACL_TYPE_ACCESS, acl)
- and acl_set_file (name, ACL_TYPE_DEFAULT, acl)
- have the same effect as
- acl_set_file (name, ACL_TYPE_EXTENDED, acl):
- Each of these calls sets the file's ACL. */
-
- acl_t acl;
- int ret;
-
- if (HAVE_ACL_GET_FD && source_desc != -1)
- acl = acl_get_fd (source_desc);
- else
- acl = acl_get_file (src_name, ACL_TYPE_EXTENDED);
- if (acl == NULL)
- {
- if (ACL_NOT_WELL_SUPPORTED (errno))
- return qset_acl (dst_name, dest_desc, mode);
- else
- return -2;
- }
-
- if (HAVE_ACL_SET_FD && dest_desc != -1)
- ret = acl_set_fd (dest_desc, acl);
- else
- ret = acl_set_file (dst_name, ACL_TYPE_EXTENDED, acl);
- if (ret != 0)
- {
- int saved_errno = errno;
-
- if (ACL_NOT_WELL_SUPPORTED (errno) && !acl_extended_nontrivial (acl))
- {
- acl_free (acl);
- return chmod_or_fchmod (dst_name, dest_desc, mode);
- }
- else
- {
- acl_free (acl);
- chmod_or_fchmod (dst_name, dest_desc, mode);
- errno = saved_errno;
- return -1;
- }
- }
- else
- acl_free (acl);
-
- /* Since !MODE_INSIDE_ACL, we have to call chmod explicitly. */
- return chmod_or_fchmod (dst_name, dest_desc, mode);
-
-# endif
-
-#elif USE_ACL && 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, ...). */
-
- int ret;
- acl_t *aclp = NULL;
- ret = (source_desc < 0
- ? acl_get (src_name, ACL_NO_TRIVIAL, &aclp)
- : facl_get (source_desc, ACL_NO_TRIVIAL, &aclp));
- if (ret != 0 && errno != ENOSYS)
- return -2;
-
- ret = qset_acl (dst_name, dest_desc, mode);
- if (ret != 0)
- return -1;
-
- if (aclp)
- {
- ret = (dest_desc < 0
- ? acl_set (dst_name, aclp)
- : facl_set (dest_desc, aclp));
- if (ret != 0)
- {
- int saved_errno = errno;
-
- acl_free (aclp);
- errno = saved_errno;
- return -1;
- }
- acl_free (aclp);
- }
-
- return 0;
-
-# 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. */
-# ifdef ACE_GETACL
- int ace_count;
- ace_t *ace_entries;
-# endif
- int count;
- aclent_t *entries;
- int did_chmod;
- int saved_errno;
- int ret;
-
-# 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).
- There is an API
- pathconf (name, _PC_ACL_ENABLED)
- fpathconf (desc, _PC_ACL_ENABLED)
- that allows to determine which of the two kinds of ACLs is supported
- for the given file. But some file systems may implement this call
- incorrectly, so better not use it.
- When fetching the source ACL, we simply fetch both ACL types.
- When setting the destination ACL, we try either ACL types, assuming
- that the kernel will translate the ACL from one form to the other.
- (See in <http://docs.sun.com/app/docs/doc/819-2241/6n4huc7ia?l=en&a=view>
- the description of ENOTSUP.) */
- for (;;)
- {
- ace_count = (source_desc != -1
- ? facl (source_desc, ACE_GETACLCNT, 0, NULL)
- : acl (src_name, ACE_GETACLCNT, 0, NULL));
-
- if (ace_count < 0)
- {
- if (errno == ENOSYS || errno == EINVAL)
- {
- ace_count = 0;
- ace_entries = NULL;
- break;
- }
- else
- return -2;
- }
-
- if (ace_count == 0)
- {
- ace_entries = NULL;
- break;
- }
-
- ace_entries = (ace_t *) malloc (ace_count * sizeof (ace_t));
- if (ace_entries == NULL)
- {
- errno = ENOMEM;
- return -2;
- }
-
- if ((source_desc != -1
- ? facl (source_desc, ACE_GETACL, ace_count, ace_entries)
- : acl (src_name, ACE_GETACL, ace_count, ace_entries))
- == ace_count)
- break;
- /* Huh? The number of ACL entries changed since the last call.
- Repeat. */
- }
-# endif
-
- for (;;)
- {
- count = (source_desc != -1
- ? facl (source_desc, GETACLCNT, 0, NULL)
- : acl (src_name, GETACLCNT, 0, NULL));
-
- if (count < 0)
- {
- if (errno == ENOSYS || errno == ENOTSUP || errno == EOPNOTSUPP)
- {
- count = 0;
- entries = NULL;
- break;
- }
- else
- return -2;
- }
-
- if (count == 0)
- {
- entries = NULL;
- break;
- }
-
- entries = (aclent_t *) malloc (count * sizeof (aclent_t));
- if (entries == NULL)
- {
- errno = ENOMEM;
- return -2;
- }
-
- if ((source_desc != -1
- ? facl (source_desc, GETACL, count, entries)
- : acl (src_name, GETACL, count, entries))
- == count)
- break;
- /* Huh? The number of ACL entries changed since the last call.
- Repeat. */
- }
-
- /* Is there an ACL of either kind? */
-# ifdef ACE_GETACL
- if (ace_count == 0)
-# endif
- if (count == 0)
- return qset_acl (dst_name, dest_desc, mode);
-
- did_chmod = 0; /* set to 1 once the mode bits in 0777 have been set */
- saved_errno = 0; /* the first non-ignorable error code */
-
- if (!MODE_INSIDE_ACL)
- {
- /* On Cygwin, it is necessary to call chmod before acl, because
- chmod can change the contents of the ACL (in ways that don't
- change the allowed accesses, but still visible). */
- if (chmod_or_fchmod (dst_name, dest_desc, mode) != 0)
- saved_errno = errno;
- did_chmod = 1;
- }
-
- /* If both ace_entries and entries are available, try SETACL before
- ACE_SETACL, because SETACL cannot fail with ENOTSUP whereas ACE_SETACL
- can. */
-
- if (count > 0)
- {
- ret = (dest_desc != -1
- ? facl (dest_desc, SETACL, count, entries)
- : acl (dst_name, SETACL, count, entries));
- if (ret < 0 && saved_errno == 0)
- {
- saved_errno = errno;
- if ((errno == ENOSYS || errno == EOPNOTSUPP)
- && !acl_nontrivial (count, entries))
- saved_errno = 0;
- }
- else
- did_chmod = 1;
- }
- free (entries);
-
-# ifdef ACE_GETACL
- if (ace_count > 0)
- {
- ret = (dest_desc != -1
- ? facl (dest_desc, ACE_SETACL, ace_count, ace_entries)
- : acl (dst_name, ACE_SETACL, ace_count, ace_entries));
- if (ret < 0 && saved_errno == 0)
- {
- saved_errno = errno;
- if ((errno == ENOSYS || errno == EINVAL || errno == ENOTSUP)
- && !acl_ace_nontrivial (ace_count, ace_entries))
- saved_errno = 0;
- }
- }
- free (ace_entries);
-# endif
-
- if (MODE_INSIDE_ACL
- && did_chmod <= ((mode & (S_ISUID | S_ISGID | S_ISVTX)) ? 1 : 0))
- {
- /* We did not call chmod so far, and either the mode and the ACL are
- separate or special bits are to be set which don't fit into ACLs. */
-
- if (chmod_or_fchmod (dst_name, dest_desc, mode) != 0)
- {
- if (saved_errno == 0)
- saved_errno = errno;
- }
- }
-
- if (saved_errno)
- {
- errno = saved_errno;
- return -1;
- }
- return 0;
-
-# endif
-
-#elif USE_ACL && HAVE_GETACL /* HP-UX */
-
- int count;
- struct acl_entry entries[NACLENTRIES];
- int ret;
-
- for (;;)
- {
- count = (source_desc != -1
- ? fgetacl (source_desc, 0, NULL)
- : getacl (src_name, 0, NULL));
-
- if (count < 0)
- {
- if (errno == ENOSYS || errno == EOPNOTSUPP)
- {
- count = 0;
- break;
- }
- else
- return -2;
- }
-
- if (count == 0)
- break;
-
- if (count > NACLENTRIES)
- /* If NACLENTRIES cannot be trusted, use dynamic memory allocation. */
- abort ();
-
- if ((source_desc != -1
- ? fgetacl (source_desc, count, entries)
- : getacl (src_name, count, entries))
- == count)
- break;
- /* Huh? The number of ACL entries changed since the last call.
- Repeat. */
- }
-
- if (count == 0)
- return qset_acl (dst_name, dest_desc, mode);
-
- ret = (dest_desc != -1
- ? fsetacl (dest_desc, count, entries)
- : setacl (dst_name, count, entries));
- if (ret < 0)
- {
- int saved_errno = errno;
-
- if (errno == ENOSYS || errno == EOPNOTSUPP)
- {
- struct stat source_statbuf;
-
- if ((source_desc != -1
- ? fstat (source_desc, &source_statbuf)
- : stat (src_name, &source_statbuf)) == 0)
- {
- if (!acl_nontrivial (count, entries, &source_statbuf))
- return chmod_or_fchmod (dst_name, dest_desc, mode);
- }
- else
- saved_errno = errno;
- }
-
- chmod_or_fchmod (dst_name, dest_desc, mode);
- errno = saved_errno;
- return -1;
- }
-
- if (mode & (S_ISUID | S_ISGID | S_ISVTX))
- {
- /* We did not call chmod so far, and either the mode and the ACL are
- separate or special bits are to be set which don't fit into ACLs. */
-
- return chmod_or_fchmod (dst_name, dest_desc, mode);
- }
- return 0;
-
-#elif USE_ACL && HAVE_ACLX_GET && 0 /* AIX */
-
- /* TODO */
-
-#elif USE_ACL && HAVE_STATACL /* older AIX */
-
- union { struct acl a; char room[4096]; } u;
- int ret;
-
- if ((source_desc != -1
- ? fstatacl (source_desc, STX_NORMAL, &u.a, sizeof (u))
- : statacl (src_name, STX_NORMAL, &u.a, sizeof (u)))
- < 0)
- return -2;
-
- ret = (dest_desc != -1
- ? fchacl (dest_desc, &u.a, u.a.acl_len)
- : chacl (dst_name, &u.a, u.a.acl_len));
- if (ret < 0)
- {
- int saved_errno = errno;
-
- chmod_or_fchmod (dst_name, dest_desc, mode);
- errno = saved_errno;
- return -1;
- }
-
- /* No need to call chmod_or_fchmod at this point, since the mode bits
- S_ISUID, S_ISGID, S_ISVTX are also stored in the ACL. */
-
- return 0;
-
-#else
-
- return qset_acl (dst_name, dest_desc, mode);
-
-#endif
-}
-
-
-/* Copy access control lists from one file to another. If SOURCE_DESC is
- a valid file descriptor, use file descriptor operations, else use
- filename based operations on SRC_NAME. Likewise for DEST_DESC and
- DST_NAME.
- If access control lists are not available, fchmod the target file to
- MODE. Also sets the non-permission bits of the destination file
- (S_ISUID, S_ISGID, S_ISVTX) to those from MODE if any are set.
- Return 0 if successful, otherwise output a diagnostic and return -1. */
+ Return 0 if successful, otherwise output a diagnostic and return a
+ negative error code. */
int
copy_acl (const char *src_name, int source_desc, const char *dst_name,
{
case -2:
error (0, errno, "%s", quote (src_name));
- return -1;
+ break;
case -1:
error (0, errno, _("preserving permissions for %s"), quote (dst_name));
- return -1;
+ break;
default:
- return 0;
+ break;
}
+ return ret;
}
projects / platform / upstream / gettext.git / blobdiff