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/* libguestfs - the guestfsd daemon
* Copyright (C) 2012 Red Hat 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdio.h>
#include <limits.h>
#include <unistd.h>
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
#include "optgroups.h"
#if defined(HAVE_ACL)
#include <sys/types.h>
#include <sys/acl.h>
int
optgroup_acl_available (void)
{
return 1;
}
char *
do_acl_get_file (const char *path, const char *acltype)
{
acl_type_t t;
acl_t acl;
char *r, *ret;
if (STREQ (acltype, "access"))
t = ACL_TYPE_ACCESS;
else if (STREQ (acltype, "default"))
t = ACL_TYPE_DEFAULT;
else {
reply_with_error ("invalid acltype parameter: %s", acltype);
return NULL;
}
CHROOT_IN;
acl = acl_get_file (path, t);
CHROOT_OUT;
if (acl == NULL) {
reply_with_perror ("%s", path);
return NULL;
}
r = acl_to_text (acl, NULL);
if (r == NULL) {
reply_with_perror ("acl_to_text");
acl_free (acl);
return NULL;
}
acl_free (acl);
/* 'r' is not an ordinary pointer that can be freed with free(3)!
* In the current implementation of libacl, if you try to do that it
* will segfault. We have to duplicate this into an ordinary
* buffer, then call acl_free (r).
*/
ret = strdup (r);
if (ret == NULL) {
reply_with_perror ("strdup");
acl_free (r);
return NULL;
}
acl_free (r);
return ret; /* caller frees */
}
int
do_acl_set_file (const char *path, const char *acltype, const char *aclstr)
{
acl_type_t t;
acl_t acl;
int r;
if (STREQ (acltype, "access"))
t = ACL_TYPE_ACCESS;
else if (STREQ (acltype, "default"))
t = ACL_TYPE_DEFAULT;
else {
reply_with_error ("invalid acltype parameter: %s", acltype);
return -1;
}
acl = acl_from_text (aclstr);
if (acl == NULL) {
reply_with_perror ("could not parse acl string: %s: acl_from_text", aclstr);
return -1;
}
CHROOT_IN;
r = acl_set_file (path, t, acl);
CHROOT_OUT;
if (r == -1) {
reply_with_perror ("%s", path);
acl_free (acl);
return -1;
}
acl_free (acl);
return 0;
}
int
do_acl_delete_def_file (const char *dir)
{
int r;
CHROOT_IN;
r = acl_delete_def_file (dir);
CHROOT_OUT;
if (r == -1) {
reply_with_perror ("%s", dir);
return -1;
}
return 0;
}
#else /* no acl library */
/* Note that the wrapper code (daemon/stubs.c) ensures that the
* functions below are never called because
* optgroup_acl_available returns false.
*/
int
optgroup_acl_available (void)
{
return 0;
}
extern char *do_acl_get_file (const char *path, const char *acltype) __attribute__((noreturn));
char *
do_acl_get_file (const char *path, const char *acltype)
{
abort ();
}
extern int do_acl_set_file (const char *path, const char *acltype, const char *acl) __attribute__((noreturn));
int
do_acl_set_file (const char *path, const char *acltype, const char *acl)
{
abort ();
}
extern int do_acl_delete_def_file (const char *dir) __attribute__((noreturn));
int
do_acl_delete_def_file (const char *dir)
{
abort ();
}
#endif /* no acl library */
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