mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
7d2ae9f30f
Since we as developers rarely test the case where some library is
statically not available, that side of the code was hardly tested,
except by unfortunate users in the field who often hit cases where
functions were missing or misdeclared. In fact, when making this
change I noticed several bugs like that.
Change it so that this code is autogenerated, and therefore always
correct and up to date.
Previous code which looked like this:
int
optgroup_acl_available (void)
{
return 0;
}
char * __attribute__((noreturn))
do_acl_get_file (const char *path, const char *acltype)
{
abort ();
}
/* etc */
is replaced by a single line:
OPTGROUP_ACL_NOT_AVAILABLE
112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2012 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <limits.h>
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#include <unistd.h>
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#include "guestfs_protocol.h"
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#include "daemon.h"
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#include "actions.h"
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#include "optgroups.h"
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#if defined(HAVE_CAP)
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#include <sys/capability.h>
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int
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optgroup_linuxcaps_available (void)
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{
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return 1;
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}
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char *
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do_cap_get_file (const char *path)
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{
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cap_t cap;
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char *r, *ret;
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CHROOT_IN;
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cap = cap_get_file (path);
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CHROOT_OUT;
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if (cap == NULL) {
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reply_with_perror ("%s", path);
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return NULL;
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}
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r = cap_to_text (cap, NULL);
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if (r == NULL) {
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reply_with_perror ("cap_to_text");
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cap_free (cap);
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return NULL;
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}
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cap_free (cap);
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/* 'r' is not an ordinary pointer that can be freed with free(3)!
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* In the current implementation of libcap, if you try to do that it
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* will segfault. We have to duplicate this into an ordinary
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* buffer, then call cap_free (r).
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*/
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ret = strdup (r);
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if (ret == NULL) {
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reply_with_perror ("strdup");
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cap_free (r);
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return NULL;
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}
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cap_free (r);
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return ret; /* caller frees */
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}
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int
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do_cap_set_file (const char *path, const char *capstr)
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{
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cap_t cap;
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int r;
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cap = cap_from_text (capstr);
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if (cap == NULL) {
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reply_with_perror ("could not parse cap string: %s: cap_from_text", capstr);
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return -1;
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}
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CHROOT_IN;
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r = cap_set_file (path, cap);
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CHROOT_OUT;
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if (r == -1) {
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reply_with_perror ("%s", path);
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cap_free (cap);
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return -1;
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}
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cap_free (cap);
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return 0;
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}
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#else /* no libcap */
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OPTGROUP_LINUXCAPS_NOT_AVAILABLE
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#endif /* no libcap */
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