+++ /dev/null
-/* 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 1.6 2003/02/26 21:37:36 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);
-/* computation function for DirScan */
-int ComputeValues(struct dirent * direntry);
-void HandSIGTERM(int signo);
-
-/* global variables for shared memory segment */
-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;
-} *shmptr;
-key_t key;
-int mutex;
-
-int main(int argc, char *argv[])
-{
- int i, pause = 10;
- /*
- * Input section: decode command line parameters
- * Use getopt function
- */
- opterr = 0; /* don't want writing to stderr */
- while ( (i = getopt(argc, argv, "hp:")) != -1) {
- switch (i) {
- /*
- * Handling options
- */
- case 'p': /* set pause (in sec.) */
- pause = strtol(optarg, NULL, 10);
- break;
- 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();
- }
- if (chdir(argv[1])) { /* chdir to be sure dir exist */
- perror("Cannot find directory to monitor");
- exit(1);
- }
- Signal(SIGTERM, HandSIGTERM); /* set handlers for termination */
- Signal(SIGINT, HandSIGTERM);
- Signal(SIGQUIT, HandSIGTERM);
- key = ftok("~/gapil/sources/DirMonitor.c", 1); /* define a key, use dir */
- shmptr = ShmCreate(key, 4096, 0666, 0); /* get a shared memory segment */
- if (!shmptr) {
- perror("Cannot create shared memory");
- exit(1);
- }
- if ((mutex = MutexCreate(key)) == -1) { /* get a Mutex */
- perror("Cannot create mutex");
- exit(1);
- }
- /* main loop, monitor directory properties each 10 sec */
- daemon(1, 0); /* demonize process, staying in monitored dir */
- while (1) {
- MutexLock(mutex); /* lock shared memory */
- memset(shmptr, 0, sizeof(struct DirProp)); /* erase previous data */
- DirScan(argv[1], ComputeValues); /* execute scan */
- MutexUnlock(mutex); /* unlock shared memory */
- sleep(pause); /* sleep until next watch */
- }
-}
-/*
- * Routine to compute directory properties inside DirScan
- */
-int ComputeValues(struct dirent * direntry)
-{
- struct stat data;
- stat(direntry->d_name, &data); /* get stat data */
- shmptr->tot_size += data.st_size;
- shmptr->tot_files++;
- if (S_ISREG(data.st_mode)) shmptr->tot_regular++;
- if (S_ISFIFO(data.st_mode)) shmptr->tot_fifo++;
- if (S_ISLNK(data.st_mode)) shmptr->tot_link++;
- if (S_ISDIR(data.st_mode)) shmptr->tot_dir++;
- if (S_ISBLK(data.st_mode)) shmptr->tot_block++;
- if (S_ISCHR(data.st_mode)) shmptr->tot_char++;
- if (S_ISSOCK(data.st_mode)) shmptr->tot_sock++;
- 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(" DirMonitor [-h] [-p sec] dirname \n");
- printf(" -h print this help\n");
- printf(" -p sec set watch interval to sec seconds \n");
- exit(1);
-}
-/*
- * Signal Handler to manage termination
- */
-void HandSIGTERM(int signo) {
- MutexLock(mutex);
- debug("Terminated by %s\n", strsignal(signo));
- ShmRemove(key, shmptr);
- MutexRemove(mutex);
- exit(0);
-}
projects / gapil.git / blobdiff