Aggiunto esempio di directory scan e iniziato monitor

[gapil.git] / sources / DirMonitor.c

diff --git a/sources/DirMonitor.c b/sources/DirMonitor.c
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+/* DirMonitor.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.
+ */
+/*****************************************************************************
+ *
+ * File DirMonitor: 
+ *
+ * An example for shared memory use: monitor a directory status,
+ * saving data in a shared memory segment
+ *
+ * Author: S. Piccardi Jan. 2003
+ *
+ * $Id: DirMonitor.c,v 1.1 2003/01/03 23:16:05 piccardi Exp $
+ *
+ *****************************************************************************/
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>        /* directory */
+#include <stdlib.h>        /* C standard library */
+#include <unistd.h>
+
+#include "Gapil.h"
+
+/* Help printing routine */
+void usage(void);
+/* computation function for DirScan */
+int ComputeValues(struct dirent * direntry);
+
+/* global variable for shared memory segment */
+int shmid;                                       /* Shared memory identifier */
+
+int main(int argc, char *argv[]) 
+{
+    int i;
+    int mutex;
+    /*
+     * Input section: decode command line parameters 
+     * Use getopt function
+     */
+    opterr = 0;         /* don't want writing to stderr */
+    while ( (i = getopt(argc, argv, "hs:l:wrbf")) != -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
+     * 
+     * ***********************************************************/
+    if ((argc - optind) != 1) {          /* There must be remaing parameters */
+       printf("Wrong number of arguments %d\n", argc - optind);
+        usage();
+    }
+    
+    DirScan(argv[1], ComputeValues);
+    exit(0);
+}
+/*
+ * Routine to print file name and size inside DirScan
+ */
+int do_ls(struct dirent * direntry) 
+{
+    struct stat data;
+    stat(direntry->d_name, &data);                          /* get stat data */
+    printf("File: %s \t size: %d\n", direntry->d_name, data.st_size);
+    return 0;
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+    printf("Program myls: list file in a directory \n");
+    printf("Usage:\n");
+    printf("  myls [-h] dirname \n");
+    printf("  -h          print this help\n");
+    exit(1);
+}