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sortix--sortix/libc/grent.cpp
Jonas 'Sortie' Termansen 6da33c469b Add grent(3).
2013-12-17 14:30:30 +01:00

67 lines
1.9 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
grent.cpp
Group database.
*******************************************************************************/
#include <sys/types.h>
#include <grp.h>
#include <stdlib.h>
#include <string.h>
const gid_t ROOT_GID = 0;
const char* const ROOT_NAME = "root";
static struct group global_group;
static struct group* fill_group(struct group* gr)
{
const char* env_groupname = getenv("GROUPNAME");
strcpy(gr->gr_name, env_groupname ? env_groupname : ROOT_NAME);
const char* env_groupid = getenv("GROUPID");
gr->gr_gid = env_groupid ? atoi(env_groupid) : ROOT_GID;
return gr;
}
static gid_t lookup_groupname(const char* name)
{
const char* env_groupname = getenv("GROUPNAME");
const char* my_groupname = env_groupname ? env_groupname : ROOT_NAME;
if ( !strcmp(my_groupname, name) )
{
const char* env_groupid = getenv("GROUPID");
if ( env_groupid )
return atoi(env_groupid);
}
return 1;
}
extern "C" struct group* getgrgid(gid_t gid)
{
(void) gid;
return fill_group(&global_group);
}
extern "C" struct group* getgrnam(const char* name)
{
return getgrgid(lookup_groupname(name));
}