DZone Snippets: directories code

Listing the files and subdirectories in C - Linux

Tvrtko (Tvrtko) — Tue, 08 Jul 2008 01:13:50 GMT

// program lists the files and subdirectories within a given directory in full path



#include 

#include 

#include 

#include 



char *path_cat (const char *str1, char *str2);



int main () {

	struct dirent *dp;



        // enter existing path to directory below

	const char *dir_path="/path/to/directory/to/list";

	DIR *dir = opendir(dir_path);

	while ((dp=readdir(dir)) != NULL) {

		char *tmp;

		tmp = path_cat(dir_path, dp->d_name);

		printf("%s\n", tmp);

		free(tmp);

		tmp=NULL;

	}

	closedir(dir);

	return 0;

}



char *path_cat (const char *str1, char *str2) {

	size_t str1_len = strlen(str1);

	size_t str2_len = strlen(str2);

	char *result;

	result = malloc((str1_len+str2_len+1)*sizeof *result);

	strcpy (result,str1);

	int i,j;

	for(i=str1_len, j=0; ((i<(str1_len+str2_len)) && (j		result[i]=str2[j];

	}

	result[str1_len+str2_len]='\0';

	return result;

}

Delete empty directories (UNIX)

jasonbentley (Jason Bentley) — Sat, 18 Nov 2006 03:21:34 GMT

// Shell command to delete empty directories. May have to run several times to get everything.



find . -type d -empty | xargs rmdir -

Get all sub-directories

gregg.irwin (Gregg Irwin) — Mon, 23 Jan 2006 01:55:00 GMT



    dirs: func [

        {Returns a block of fully qualified subdirectories for the directory.}

        spec  [file!]   "Starting directory"

        block [block!]  "Block to append to"

        /deep           "Recurse sub-directories."

        /local f-spec

    ][

        spec: dirize spec

        foreach file read spec [

            if dir? f-spec: join spec file [

                append block f-spec

                if deep [all-dirs/deep f-spec block]

            ]

        ]

        block

    ]