+/* ReadMonitor.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 ReadMonitor:
+ *
+ * An example for shared memory use: read data saved in a shared
+ * memory segment from the DirMonitor program
+ *
+ * Author: S. Piccardi Jan. 2003
+ *
+ * $Id: ReadMonitor.c,v 1.1 2003/01/10 09:28:49 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"
+#include "macros.h"
+
+/* Help printing routine */
+void usage(void);
+
+/* variables for shared memory segment */
+int shmid;
+struct DirProp {
+ int tot_size;
+ int tot_files;
+ int tot_regular;
+ int tot_fifo;
+ int tot_link;
+ int tot_dir;
+ int tot_block;
+ int tot_char;
+ int tot_sock;
+};
+struct DirProp *shmptr;
+int mutex;
+
+int main(int argc, char *argv[])
+{
+ int i;
+ key_t key;
+ /*
+ * 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
+ *
+ * ***********************************************************/
+ /* create needed IPC objects */
+ key = ftok("./DirMonitor.c", 1); /* define a key */
+ shmid = shmget(key, 4096, 0); /* get a shared memory ID */
+ if (shmid < 0) {
+ perror("Cannot find shared memory");
+ exit(1);
+ }
+ if ( (shmptr = shmat(shmid, NULL, 0)) == NULL ) { /* attach to process */
+ perror("Cannot attach segment");
+ exit(1);
+ }
+ if ((mutex = MutexFind(key)) == -1) { /* get the Mutex */
+ perror("Cannot find mutex");
+ exit(1);
+ }
+ /* main loop */
+ MutexLock(mutex); /* lock shared memory */
+ printf("Ci sono %d file dati\n", shmptr->tot_regular);
+ printf("Ci sono %d directory\n", shmptr->tot_dir);
+ printf("Ci sono %d link\n", shmptr->tot_link);
+ printf("Ci sono %d fifo\n", shmptr->tot_fifo);
+ printf("Ci sono %d socket\n", shmptr->tot_sock);
+ printf("Ci sono %d device a caratteri\n", shmptr->tot_char);
+ printf("Ci sono %d device a blocchi\n", shmptr->tot_block);
+ printf("Totale %d file, per %d byte\n",
+ shmptr->tot_files, shmptr->tot_size);
+ MutexUnlock(mutex); /* unlock shared memory */
+}
+/*
+ * 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);
+}
projects / gapil.git / commitdiff