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 /*****************************************************************************
21 * File myls.c: An example ls
23 * Author: S. Piccardi Jan. 2003
25 *****************************************************************************/
26 #include <sys/types.h> /* primitive system data types */
27 #include <sys/stat.h> /* file characteristics constants and functions */
28 #include <dirent.h> /* directory operation constants and functions */
29 #include <stdlib.h> /* C standard library */
30 #include <unistd.h> /* unix standard library */
36 * List files and their size inside a given directory
38 /* Help printing routine */
40 /* computation function for DirScan */
41 int do_ls(struct dirent * direntry);
43 int main(int argc, char *argv[])
47 * Input section: decode command line parameters
50 opterr = 0; /* don't want writing to stderr */
51 while ( (i = getopt(argc, argv, "hs:l:wrbf")) != -1) {
56 case 'h': /* help option */
57 printf("Wrong -h option use\n");
61 case '?': /* unrecognized options */
62 printf("Unrecognized options -%c\n",optopt);
64 default: /* should not reached */
68 /* ***********************************************************
70 * Options processing completed
74 * ***********************************************************/
75 if ((argc - optind) != 1) { /* There must be remaing parameters */
76 printf("Wrong number of arguments %d\n", argc - optind);
79 DirScan(argv[1], do_ls);
83 * Routine to print file name and size inside DirScan
85 int do_ls(struct dirent * direntry)
88 stat(direntry->d_name, &data); /* get stat data */
89 printf("File: %s \t size: %d\n", direntry->d_name, data.st_size);
93 * routine to print usage info and exit
96 printf("Program myls: list file in a directory \n");
98 printf(" myls [-h] dirname \n");
99 printf(" -h print this help\n");