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getgrent.cc
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1996-11-20
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/*
Copyright (C) 1996 John W. Eaton
This file is part of Octave.
Octave 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 2, or (at your option) any
later version.
Octave 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 Octave; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include "defun-dld.h"
#include "error.h"
#include "gripes.h"
#include "help.h"
#include "oct-map.h"
#include "ov.h"
#include "oct-obj.h"
#include "utils.h"
// Group file functions. (Why not?)
static octave_value
mk_gr_map (struct group *gr)
{
octave_value retval;
if (gr)
{
Octave_map m;
m ["name"] = gr->gr_name;
#if defined (HAVE_GR_PASSWD)
m ["passwd"] = gr->gr_passwd;
#else
m ["passwd"] = "";
#endif
m ["gid"] = STATIC_CAST (double, gr->gr_gid);
if (gr->gr_mem)
{
// XXX FIXME XXX -- maybe there should be a string_vector
// constructor that takes a NULL terminated list of C
// strings.
char **tmp = gr->gr_mem;
int k = 0;
while (*tmp++)
k++;
if (k > 0)
{
tmp = gr->gr_mem;
string_vector members (k);
for (int i = 0; i < k; i++)
members[i] = tmp[i];
m ["mem"] = members;
}
else
m ["mem"] = "";
}
retval = m;
}
else
retval = 0.0;
return retval;
}
DEFUN_DLD (getgrent, args, ,
"getgrent ()\n\
\n\
Read an entry from the group-file stream, opening it if necessary.")
{
octave_value retval;
int nargin = args.length ();
if (nargin == 0)
{
#ifdef HAVE_GETGRENT
retval = mk_gr_map (getgrent ());
#else
gripe_not_supported ("getgrent");
#endif
}
else
print_usage ("getgrent");
return retval;
}
DEFUN_DLD (getgrgid, args, ,
"getgrgid (GID)\n\
\n\
Search for a group entry with a matching group ID.")
{
octave_value retval;
int nargin = args.length ();
if (nargin == 1)
{
#ifdef HAVE_GETGRGID
double dval = args(0).double_value ();
if (! error_state)
{
if (D_NINT (dval) == dval)
{
gid_t gid = STATIC_CAST (gid_t, dval);
retval = mk_gr_map (getgrgid (gid));
}
else
error ("getgrgid: argument must be an integer");
}
#else
gripe_not_supported ("getgrgid");
#endif
}
else
print_usage ("getgrgid");
return retval;
}
DEFUN_DLD (getgrnam, args, ,
"getgrnam (NAME)\n\
\n\
Search for group entry with a matching group name.")
{
octave_value retval;
int nargin = args.length ();
if (nargin == 1)
{
#ifdef HAVE_GETGRNAM
string s = args(0).string_value ();
if (! error_state)
retval = mk_gr_map (getgrnam (s.c_str ()));
#else
gripe_not_supported ("getgrnam");
#endif
}
else
print_usage ("getgrnam");
return retval;
}
DEFUN_DLD (setgrent, args, ,
"setgrent ()\n\
\n\
Rewind the group-file stream.")
{
octave_value retval;
int nargin = args.length ();
if (nargin == 0)
{
#ifdef HAVE_SETGRENT
setgrent ();
#else
gripe_not_supported ("setgrent");
#endif
}
else
print_usage ("setgrent");
return retval;
}
DEFUN_DLD (endgrent, args, ,
"endgrent ()\n\
\n\
Close the group-file stream.")
{
octave_value retval;
int nargin = args.length ();
if (nargin == 0)
{
#ifdef HAVE_ENDGRENT
endgrent ();
#else
gripe_not_supported ("endgrent");
#endif
}
else
print_usage ("endgrent");
return retval;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/