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/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
struct conf
{
CONST char *name;
CONST int call_name;
CONST enum { SYSCONF, CONFSTR, PATHCONF } call;
};
static struct conf vars[] =
{
{ "LINK_MAX", _PC_LINK_MAX, PATHCONF },
{ "MAX_CANON", _PC_MAX_CANON, PATHCONF },
{ "MAX_INPUT", _PC_MAX_INPUT, PATHCONF },
{ "NAME_MAX", _PC_NAME_MAX, PATHCONF },
{ "PATH_MAX", _PC_PATH_MAX, PATHCONF },
{ "PIPE_BUF", _PC_PIPE_BUF, PATHCONF },
{ "_POSIX_CHOWN_RESTRICTED", _PC_CHOWN_RESTRICTED, PATHCONF },
{ "_POSIX_NO_TRUNC", _PC_NO_TRUNC, PATHCONF },
{ "_POSIX_VDISABLE", _PC_VDISABLE, PATHCONF },
{ "ARG_MAX", _SC_ARG_MAX, SYSCONF },
{ "CHILD_MAX", _SC_CHILD_MAX, SYSCONF },
{ "CLK_TCK", _SC_CLK_TCK, SYSCONF },
{ "NGROUPS_MAX", _SC_NGROUPS_MAX, SYSCONF },
{ "OPEN_MAX", _SC_OPEN_MAX, SYSCONF },
{ "_POSIX_JOB_CONTROL", _SC_JOB_CONTROL, SYSCONF },
{ "_POSIX_SAVED_IDS", _SC_SAVED_IDS, SYSCONF },
{ "_POSIX_VERSION", _SC_VERSION, SYSCONF },
{ "PATH", _CS_PATH, CONFSTR },
{ NULL, 0, SYSCONF }
};
static CONST char *program;
static void
DEFUN_VOID(usage)
{
fprintf (stderr, "Usage: %s variable_name [pathname]\n", program);
exit (2);
}
int
DEFUN(main, (argc, argv), int argc AND char **argv)
{
register CONST struct conf *c;
program = strrchr (argv[0], '/');
if (program == NULL)
program = argv[0];
else
++program;
if (argc < 2 || argc > 3)
usage ();
for (c = vars; c->name != NULL; ++c)
if (!strcmp (c->name, argv[1]))
{
long int value;
size_t clen;
char *cvalue;
switch (c->call)
{
case PATHCONF:
if (argc < 3)
usage ();
value = pathconf (argv[2], c->call_name);
if (value == -1)
{
fprintf (stderr, "%s: pathconf: %s: %s\n",
program, argv[2], strerror (errno));
exit (3);
}
printf ("%ld\n", value);
exit (0);
case SYSCONF:
if (argc > 2)
usage ();
value = sysconf (c->call_name);
printf ("%ld\n", value);
exit (0);
case CONFSTR:
if (argc > 2)
usage ();
clen = confstr (c->call_name, (char *) NULL, 0);
cvalue = (char *) malloc (clen);
if (cvalue == NULL)
{
fprintf (stderr, "%s: malloc: %s\n",
program, strerror (errno));
exit (3);
}
if (confstr (c->call_name, cvalue, clen) != clen)
{
fprintf (stderr, "%s: confstr: %s\n",
program, strerror (errno));
exit (3);
}
printf ("%.*s\n", (int) clen, cvalue);
exit (0);
}
}
fprintf (stderr, "%s: Unrecognized variable `%s'\n", program, argv[1]);
exit (2);
}
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