static dbus_bool_t
fill_group_info (DBusGroupInfo *info,
dbus_gid_t gid,
const DBusString *groupname,
DBusError *error)
{
const char *group_c_str;
_dbus_assert (groupname != NULL || gid != DBUS_GID_UNSET);
_dbus_assert (groupname == NULL || gid == DBUS_GID_UNSET);
if (groupname)
group_c_str = _dbus_string_get_const_data (groupname);
else
group_c_str = NULL;
/* For now assuming that the getgrnam() and getgrgid() flavors
* always correspond to the pwnam flavors, if not we have
* to add more configure checks.
*/
#if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
{
struct group *g;
int result;
char buf[1024];
struct group g_str;
g = NULL;
#ifdef HAVE_POSIX_GETPWNAM_R
if (group_c_str)
result = getgrnam_r (group_c_str, &g_str, buf, sizeof (buf),
&g);
else
result = getgrgid_r (gid, &g_str, buf, sizeof (buf),
&g);
#else
g = getgrnam_r (group_c_str, &g_str, buf, sizeof (buf));
result = 0;
#endif /* !HAVE_POSIX_GETPWNAM_R */
if (result == 0 && g == &g_str)
{
return fill_user_info_from_group (g, info, error);
}
else
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Group %s unknown or failed to look it up\n",
group_c_str ? group_c_str : "???");
return FALSE;
}
}
#else /* ! HAVE_GETPWNAM_R */
{
/* I guess we're screwed on thread safety here */
struct group *g;
g = getgrnam (group_c_str);
if (g != NULL)
{
return fill_user_info_from_group (g, info, error);
}
else
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Group %s unknown or failed to look it up\n",
group_c_str ? group_c_str : "???");
return FALSE;
}
}
#endif /* ! HAVE_GETPWNAM_R */
}
static dbus_bool_t
fill_group_info (DBusGroupInfo *info,
dbus_gid_t gid,
const DBusString *groupname,
DBusError *error)
{
const char *group_c_str;
_dbus_assert (groupname != NULL || gid != DBUS_GID_UNSET);
_dbus_assert (groupname == NULL || gid == DBUS_GID_UNSET);
if (groupname)
group_c_str = _dbus_string_get_const_data (groupname);
else
group_c_str = NULL;
/* For now assuming that the getgrnam() and getgrgid() flavors
* always correspond to the pwnam flavors, if not we have
* to add more configure checks.
*/
#if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
{
struct group *g;
int result;
size_t buflen;
char *buf;
struct group g_str;
dbus_bool_t b;
/* retrieve maximum needed size for buf */
buflen = sysconf (_SC_GETGR_R_SIZE_MAX);
/* sysconf actually returns a long, but everything else expects size_t,
* so just recast here.
* https://bugs.freedesktop.org/show_bug.cgi?id=17061
*/
if ((long) buflen <= 0)
buflen = 1024;
result = -1;
while (1)
{
buf = dbus_malloc (buflen);
if (buf == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return FALSE;
}
g = NULL;
#ifdef HAVE_POSIX_GETPWNAM_R
if (group_c_str)
result = getgrnam_r (group_c_str, &g_str, buf, buflen,
&g);
else
result = getgrgid_r (gid, &g_str, buf, buflen,
&g);
#else
g = getgrnam_r (group_c_str, &g_str, buf, buflen);
result = 0;
#endif /* !HAVE_POSIX_GETPWNAM_R */
/* Try a bigger buffer if ERANGE was returned:
https://bugs.freedesktop.org/show_bug.cgi?id=16727
*/
if (result == ERANGE && buflen < 512 * 1024)
{
dbus_free (buf);
buflen *= 2;
}
else
{
break;
}
}
if (result == 0 && g == &g_str)
{
b = fill_user_info_from_group (g, info, error);
dbus_free (buf);
return b;
}
else
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Group %s unknown or failed to look it up\n",
group_c_str ? group_c_str : "???");
dbus_free (buf);
return FALSE;
}
}
#else /* ! HAVE_GETPWNAM_R */
{
/* I guess we're screwed on thread safety here */
struct group *g;
g = getgrnam (group_c_str);
if (g != NULL)
{
return fill_user_info_from_group (g, info, error);
}
else
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Group %s unknown or failed to look it up\n",
group_c_str ? group_c_str : "???");
return FALSE;
}
}
#endif /* ! HAVE_GETPWNAM_R */
}
