Homework Four
lstree

Submit your source code via email attachment to dannellys@winthrop.edu with the subject line CSCI325 - HW 04 by 2:00pm on February 22.

The Problem

• Write a program that will accept the name of a directory, along with a tree depth, then print a directory tree of that depth with the root of the tree being the specified directory.
• The format should be "lstree name depth".
• Use identition to indicate directory level.
• Do not print the . or .. entries.
• Hint: Recursion is wonderful.

For example, assuming the current directory has three entries - two files and a directory named testdir - and testdir has one file named bob:

   > lstree . 2
   myls1.c
   myls2.c
   testdir
      bob

Helpful Code

Here is the myls2 program that we discussed in class.

/******************************************* myls2 - Print a director with inode numbers and mark directories Dannelly - February 2011 ********************************************/ #include <sys/types.h> #include <sys/stat.h> #include <dirent.h> #include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]) { DIR *dp; // ptr to directory struct dirent *dirp; // prt to next dir entry struct stat stat_info; // file status information /***** check for correct command line *****/ if (argc != 2) { printf ("must provide a directory name\n"); exit (1); } /***** can that directory really be opened??? *****/ if ( ( dp = opendir(argv[1])) == NULL) { printf ("cannot open %s\n",argv[1]); exit (1); } /***** process all directory entries *****/ while ( ( dirp = readdir(dp)) != NULL) { printf ( "%20s %d", dirp->d_name,dirp->d_ino); stat (dirp->d_name, &stat_info); if (S_ISDIR(stat_info.st_mode)) // if directory printf (" directory\n"); // label it else printf ("\n"); // else print nothing else } /***** done *****/ closedir (dp); }