3 * Copyright (C) 2002 Simone Piccardi
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /*****************************************************************************
23 * An example for shared memory use: monitor a directory status,
24 * saving data in a shared memory segment
26 * Author: S. Piccardi Jan. 2003
28 * $Id: DirMonitor.c,v 1.1 2003/01/03 23:16:05 piccardi Exp $
30 *****************************************************************************/
31 #include <sys/types.h>
33 #include <dirent.h> /* directory */
34 #include <stdlib.h> /* C standard library */
39 /* Help printing routine */
41 /* computation function for DirScan */
42 int ComputeValues(struct dirent * direntry);
44 /* global variable for shared memory segment */
45 int shmid; /* Shared memory identifier */
47 int main(int argc, char *argv[])
52 * Input section: decode command line parameters
55 opterr = 0; /* don't want writing to stderr */
56 while ( (i = getopt(argc, argv, "hs:l:wrbf")) != -1) {
61 case 'h': /* help option */
62 printf("Wrong -h option use\n");
66 case '?': /* unrecognized options */
67 printf("Unrecognized options -%c\n",optopt);
69 default: /* should not reached */
73 /* ***********************************************************
75 * Options processing completed
79 * ***********************************************************/
80 if ((argc - optind) != 1) { /* There must be remaing parameters */
81 printf("Wrong number of arguments %d\n", argc - optind);
85 DirScan(argv[1], ComputeValues);
89 * Routine to print file name and size inside DirScan
91 int do_ls(struct dirent * direntry)
94 stat(direntry->d_name, &data); /* get stat data */
95 printf("File: %s \t size: %d\n", direntry->d_name, data.st_size);
99 * routine to print usage info and exit
102 printf("Program myls: list file in a directory \n");
104 printf(" myls [-h] dirname \n");
105 printf(" -h print this help\n");