mirror of
https://git.savannah.gnu.org/git/gnulib.git
synced 2025-08-16 01:22:18 +03:00
* build-aux/gendocs.sh (version): * doc/gendocs_template: * doc/gendocs_template_min: * doc/gnulib.texi: * lib/version-etc.c (COPYRIGHT_YEAR): Update copyright dates by hand in templates and the like. * all files: Run 'make update-copyright'.
132 lines
3.8 KiB
C
132 lines
3.8 KiB
C
/*
|
|
* Copyright (C) 2011-2017 Free Software Foundation, Inc.
|
|
* Written by Ben Walton.
|
|
*
|
|
* 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/>. */
|
|
|
|
#include <config.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
/* for HOST_NAME_MAX */
|
|
#include <limits.h>
|
|
/* for strlen */
|
|
#include <string.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
|
|
#include "root-uid.h"
|
|
|
|
#include "macros.h"
|
|
|
|
#define TESTHOSTNAME "gnulib-hostname"
|
|
|
|
/* mingw and MSVC 9 lack geteuid, so setup a dummy value.
|
|
On Cygwin, geteuid() may return non-zero even for user accounts with
|
|
administrator privileges, so use a dummy value as well. */
|
|
#if !HAVE_GETEUID || defined __CYGWIN__
|
|
# define geteuid() ROOT_UID
|
|
#endif
|
|
|
|
int
|
|
main (int argc, char *argv[] _GL_UNUSED)
|
|
{
|
|
char origname[HOST_NAME_MAX];
|
|
char newname[HOST_NAME_MAX];
|
|
char longname[HOST_NAME_MAX + 2];
|
|
int rcs, i;
|
|
|
|
/* skip the tests if we don't have root privilege. this does not
|
|
consider things like CAP_SYS_ADMIN (linux) or PRIV_SYS_ADMIN
|
|
(solaris), etc. systems without a working geteuid (mingw, MSVC
|
|
9) will always skip this test. */
|
|
if (geteuid () != ROOT_UID)
|
|
{
|
|
fprintf (stderr, "Skipping test: insufficient permissions.\n");
|
|
return 77;
|
|
}
|
|
|
|
/* we want to ensure we can do a get/set/get check to ensure the
|
|
change is accepted. record the current name so it can be restored
|
|
later */
|
|
ASSERT (gethostname (origname, sizeof (origname)) == 0);
|
|
|
|
/* try setting a valid hostname. if it fails -1/ENOSYS, we will
|
|
skip the test for long names as this is an indication we're using
|
|
the stub function that doesn't do anything on this platform. */
|
|
rcs = sethostname (TESTHOSTNAME, strlen (TESTHOSTNAME));
|
|
|
|
if (rcs != 0)
|
|
{
|
|
if (rcs == -1 && errno == ENOSYS)
|
|
{
|
|
fprintf (stderr,
|
|
"Skipping test: sethostname is not really implemented.\n");
|
|
return 77;
|
|
}
|
|
else if (rcs == -1 && errno == EPERM)
|
|
{
|
|
fprintf (stderr, "Skipping test: insufficient permissions.\n");
|
|
return 77;
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "error setting valid hostname.\n");
|
|
return 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ASSERT (gethostname (newname, sizeof (newname)) == 0);
|
|
|
|
/* On Windows, a hostname change becomes effective only after
|
|
a reboot. */
|
|
#if !((defined _WIN32 || defined __WIN32__) || defined __CYGWIN__)
|
|
|
|
/* if we don't get back what we put in, there is no need to
|
|
restore the original name as we will assume it was not
|
|
properly changed. */
|
|
if (strcmp (newname, TESTHOSTNAME) != 0)
|
|
{
|
|
fprintf (stderr, "set/get comparison failed.\n");
|
|
return 1;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* glibc does allow setting a zero length name, so the lower bound
|
|
needs no test. validate that we are constrained by
|
|
HOST_NAME_MAX */
|
|
for (i = 0; i < (HOST_NAME_MAX + 1); i++)
|
|
longname[i] = 'a';
|
|
|
|
longname[i] = '\0';
|
|
|
|
rcs = sethostname (longname, (HOST_NAME_MAX + 1));
|
|
|
|
if (rcs != -1)
|
|
{
|
|
/* attempt to restore the original name. */
|
|
ASSERT (sethostname (origname, strlen (origname)) == 0);
|
|
fprintf (stderr, "setting a too long hostname succeeded.\n");
|
|
return 1;
|
|
}
|
|
|
|
/* restore the original name. */
|
|
ASSERT (sethostname (origname, strlen (origname)) == 0);
|
|
|
|
return 0;
|
|
}
|