home *** CD-ROM | disk | FTP | other *** search
- /* 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);
- }
-