135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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struct conf
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{
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CONST char *name;
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CONST int call_name;
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CONST enum { SYSCONF, CONFSTR, PATHCONF } call;
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};
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static struct conf vars[] =
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{
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{ "LINK_MAX", _PC_LINK_MAX, PATHCONF },
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{ "MAX_CANON", _PC_MAX_CANON, PATHCONF },
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{ "MAX_INPUT", _PC_MAX_INPUT, PATHCONF },
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{ "NAME_MAX", _PC_NAME_MAX, PATHCONF },
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{ "PATH_MAX", _PC_PATH_MAX, PATHCONF },
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{ "PIPE_BUF", _PC_PIPE_BUF, PATHCONF },
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{ "_POSIX_CHOWN_RESTRICTED", _PC_CHOWN_RESTRICTED, PATHCONF },
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{ "_POSIX_NO_TRUNC", _PC_NO_TRUNC, PATHCONF },
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{ "_POSIX_VDISABLE", _PC_VDISABLE, PATHCONF },
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{ "ARG_MAX", _SC_ARG_MAX, SYSCONF },
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{ "CHILD_MAX", _SC_CHILD_MAX, SYSCONF },
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{ "CLK_TCK", _SC_CLK_TCK, SYSCONF },
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{ "NGROUPS_MAX", _SC_NGROUPS_MAX, SYSCONF },
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{ "OPEN_MAX", _SC_OPEN_MAX, SYSCONF },
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{ "_POSIX_JOB_CONTROL", _SC_JOB_CONTROL, SYSCONF },
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{ "_POSIX_SAVED_IDS", _SC_SAVED_IDS, SYSCONF },
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{ "_POSIX_VERSION", _SC_VERSION, SYSCONF },
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{ "PATH", _CS_PATH, CONFSTR },
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{ NULL, 0, SYSCONF }
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};
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static CONST char *program;
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static void
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DEFUN_VOID(usage)
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{
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fprintf (stderr, "Usage: %s variable_name [pathname]\n", program);
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exit (2);
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}
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int
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DEFUN(main, (argc, argv), int argc AND char **argv)
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{
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register CONST struct conf *c;
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program = strrchr (argv[0], '/');
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if (program == NULL)
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program = argv[0];
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else
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++program;
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if (argc < 2 || argc > 3)
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usage ();
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for (c = vars; c->name != NULL; ++c)
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if (!strcmp (c->name, argv[1]))
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{
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long int value;
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size_t clen;
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char *cvalue;
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switch (c->call)
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{
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case PATHCONF:
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if (argc < 3)
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usage ();
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value = pathconf (argv[2], c->call_name);
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if (value == -1)
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{
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fprintf (stderr, "%s: pathconf: %s: %s\n",
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program, argv[2], strerror (errno));
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exit (3);
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}
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printf ("%ld\n", value);
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exit (0);
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case SYSCONF:
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if (argc > 2)
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usage ();
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value = sysconf (c->call_name);
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printf ("%ld\n", value);
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exit (0);
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case CONFSTR:
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if (argc > 2)
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usage ();
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clen = confstr (c->call_name, (char *) NULL, 0);
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cvalue = (char *) malloc (clen);
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if (cvalue == NULL)
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{
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fprintf (stderr, "%s: malloc: %s\n",
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program, strerror (errno));
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exit (3);
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}
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if (confstr (c->call_name, cvalue, clen) != clen)
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{
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fprintf (stderr, "%s: confstr: %s\n",
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program, strerror (errno));
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exit (3);
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}
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printf ("%.*s\n", (int) clen, cvalue);
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exit (0);
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}
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}
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fprintf (stderr, "%s: Unrecognized variable `%s'\n", program, argv[1]);
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exit (2);
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}
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