--- /dev/null
+/* getparam.c
+ *
+ * Copyright (C) 2002 Simone Piccardi
+ *
+ * This program 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 of the License, or (at
+ * your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/****************************************************************
+ *
+ * Program getparam.c:
+ * Program to test function fopen
+ *
+ * Author: Simone Piccardi
+ * Jan. 2002
+ *
+ * Usage: getparam -h give all info's
+ *
+ * $Id: getparam.c,v 1.1 2002/01/03 23:44:14 piccardi Exp $
+ *
+ ****************************************************************/
+/*
+ * Include needed headers
+ */
+#define _GNU_SOURCE
+#include <errno.h> /* error definitions and routines */
+#include <stdlib.h> /* C standard library */
+#include <unistd.h> /* unix standard library */
+#include <string.h> /* string functions */
+#include <limits.h>
+#include <stdio.h>
+
+
+#include <time.h> /* for CLK_TCK e CLOCKS_PER_SEC */
+
+/* Table of constants for sysconf() */
+char *sc_names[]={"_SC_ARG_MAX",
+ "_SC_CHILD_MAX",
+ "_SC_OPEN_MAX",
+ "_SC_STREAM_MAX",
+ "_SC_TZNAME_MAX",
+ "_SC_NGROUPS_MAX",
+ "_SC_SSIZE_MAX",
+ "_SC_CLK_TCK",
+ "_SC_JOB_CONTROL",
+ "_SC_SAVED_IDS",
+ "_SC_VERSION"};
+
+int sc_argument[]={_SC_ARG_MAX,
+ _SC_CHILD_MAX,
+ _SC_OPEN_MAX,
+ _SC_STREAM_MAX,
+ _SC_TZNAME_MAX,
+ _SC_NGROUPS_MAX,
+ _SC_SSIZE_MAX,
+ _SC_CLK_TCK,
+ _SC_JOB_CONTROL,
+ _SC_SAVED_IDS,
+ _SC_VERSION};
+
+/*
+ Set the defined[] array to true if the macro is defined else set it
+ to false and define the macro to -1 as a marker
+*/
+int defined[]={
+#ifdef ARG_MAX
+ 1,
+#else
+#define ARG_MAX -1
+ 0,
+#endif
+#ifdef CHILD_MAX
+ 1,
+#else
+#define CHILD_MAX -1
+ 0,
+#endif
+#ifdef OPEN_MAX
+ 1,
+#else
+#define OPEN_MAX -1
+ 0,
+#endif
+#ifdef STREAM_MAX
+ 1,
+#else
+#define STREAM_MAX -1
+ 0,
+#endif
+#ifdef NGROUPS_MAX
+ 1,
+#else
+#define NGROUPS_MAX -1
+ 0,
+#endif
+#ifdef TZNAME_MAX
+ 1,
+#else
+#define TZNAME_MAX -1
+ 0,
+#endif
+#ifdef SSIZE_MAX
+ 1
+#else
+#define SSIZE_MAX -1
+ 0
+};
+
+
+
+/* values of stadard macros */
+long values[]={ARG_MAX,
+ CHILD_MAX,
+ OPEN_MAX,
+ STREAM_MAX,
+ TZNAME_MAX,
+ NGROUPS_MAX,
+ SSIZE_MAX,
+ CLOCKS_PER_SEC,
+ _POSIX_JOB_CONTROL,
+ _POSIX_SAVED_IDS,
+ _POSIX_VERSION};
+
+/* Help printing routine */
+void usage(void);
+
+int main(int argc, char *argv[])
+{
+/*
+ * Variables definition
+ */
+ int i;
+ /*
+ * Input section: decode command line parameters
+ * Use getopt function
+ */
+ opterr = 0; /* don't want writing to stderr */
+ while ( (i = getopt(argc, argv, "h")) != -1) {
+ switch (i) {
+ /*
+ * Handling options
+ */
+ case 'h': /* help option */
+ printf("Wrong -h option use\n");
+ usage();
+ return -1;
+ break;
+ case '?': /* unrecognized options */
+ printf("Unrecognized options -%c\n",optopt);
+ usage();
+ default: /* should not reached */
+ usage();
+ }
+ }
+ /* ***********************************************************
+ *
+ * Options processing completed
+ *
+ * Main code beginning
+ *
+ * ***********************************************************/
+ /* There must be 2 remaing parameters */
+ if ( (argc-optind) != 1 ) {
+ printf("From %d arguments, removed %d options\n", argc, optind);
+ usage();
+ }
+ for (i=0; i<=4; i++) {
+ printf("Response for %s is %ld, values is %ld\n", names[i],
+ sysconf(argument[i]), values[i]);
+ }
+ return 0;
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+ printf("Program testfopen : test fopen for a file \n");
+ printf("Usage:\n");
+ printf(" testfopen [-h] file mode \n");
+ printf(" -h print this help\n");
+
+ exit(1);
+}
+