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Add grent(3).

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Jonas 'Sortie' Termansen 2013-01-13 03:14:43 +01:00
parent dab4b8a981
commit 6da33c469b
3 changed files with 118 additions and 0 deletions
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1
libc/Makefile
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@ -200,6 +200,7 @@ getppid.o \
gettermmode.o \
gettimeofday.o \
getuid.o \
grent.o \
init.o \
ioctl.o \
ioleast.o \

67
libc/grent.cpp Normal file
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@ -0,0 +1,67 @@
/*******************************************************************************
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));
}

50
libc/include/grp.h Normal file
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@ -0,0 +1,50 @@
/*******************************************************************************
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/>.
grp.h
Group database.
*******************************************************************************/
#ifndef INCLUDE_GRP_H
#define INCLUDE_GRP_H
#include <features.h>
__BEGIN_DECLS
@include(gid_t.h)
@include(uid_t.h)
@include(size_t.h)
#define _GROUP_BUFFER_SIZE 64
struct group
{
char gr_name[_GROUP_BUFFER_SIZE];
gid_t gr_gid;
char** gr_mem;
};
struct group* getgrgid(gid_t gid);
struct group* getgrnam(const char* name);
__END_DECLS
#endif