Programming Challenges - A List Post: 302120025

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Top Forums Programming Programming Challenges - A List Post 302120025 by Octal on Saturday 2nd of June 2007 05:56:56 PM

06-02-2007

Registered User

Quote:

Originally Posted by matrixmadhan

Well, this is what the OP had posted

But trying in all possible ways should be good !

I don't really care.

I have another challenge:

Challenge: Create your own ls, or list the files in a directory.

Difficulty: Medium

Helpful Information: http://www.opengroup.org/onlinepubs/.../dirent.h.html

Here is my code:

Code:

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <dirent.h>

void dirlist(DIR *, const char *);

main(int argc, char *argv[]) {
	DIR *dp;
	struct dirent *dp2;

	if (argc == 1) {
		dp = opendir(".");
		if (dp == NULL) {
			perror("opendir");
		}
		dirlist(dp, "./");
	} else {
		while (--argc > 0) {
			dp = opendir(*++argv);
			if (dp == NULL) {
				perror("opendir");
			}
			dirlist(dp, *argv);

			if (argc > 1) {
				printf("\n");
			}
		}
	}
	closedir(dp);
}
void dirlist(DIR *dp, const char *name) {
	struct dirent *dp2;

	printf("%s:\n", name);
	while ((dp2 = readdir(dp)) != NULL) {
		if ((strstr(dp2->d_name, ".") != NULL &&
		     strstr(".", dp2->d_name) != NULL) ||
		    (strstr(dp2->d_name, "..") != NULL) &&
		     strstr("..", dp2->d_name) != NULL) {
			continue;
		}
		printf("%s  ", dp2->d_name);
	}
	printf("\n");
}

Someone else has to come up with another programming challenge...right?

Octal

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LEARN ABOUT SUNOS

dirent

dirent.h(3HEAD) 						      Headers							   dirent.h(3HEAD)

NAME

       dirent.h, dirent - format of directory entries

SYNOPSIS

       #include <dirent.h>

DESCRIPTION

       The internal format of directories is unspecified. The <dirent.h> header defines the following type:

       DIR	       A type representing a directory stream.

       The header also defines the structure dirent, which includes the following members:

       ino_t d_ino	  /* file serial number */
       char  d_name[]	  /* name of entry */

       The type ino_t is defined as described in <sys/types.h>. See types(3HEAD).

       The character array d_name is of unspecified size, but the number of bytes preceding the terminating null byte must not exceed {NAME_MAX}.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       closedir(3C), opendir(3C), readdir(3C), rewinddir(3C), seekdir(3C), telldir(3C), types.h(3HEAD), attributes(5), standards(5)

SunOS 5.10							    10 Sep 2004 						   dirent.h(3HEAD)