asked on

Recursive directory reader in C

I have this code so far, I know I need to add recursion to the equation:

If you run it you can see that I can get to all the files in the root of C:, but I
am having trouble recursing through to the subfolders .... and thier subfolders, etc...

I am not sure how to add the recursive flow to the opendir() and readdir() functions.

?????? readdir() moves to the next item in the directory ??????

/********** BEGIN OF CODE**********/
#include <sys/stat.h>
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>

char *path;
char file_name[4096];
char *newDir;
char newPath[100];
DIR * directory;
DIR * subDirectory;
struct dirent *dir_result;
struct stat stat_buf;
int stat_result;

main(){

path = "C:\\";
printf("%s\n", path);

directory = opendir(path);
dir_result = readdir(directory);

while ( dir_result != NULL) {
traverse();
dir_result = readdir(directory);
}
getchar();
}

traverse(){
sprintf(file_name, "%s\%s", path, dir_result->d_name);
stat_result = stat(file_name, &stat_buf);

if (S_ISDIR(stat_buf.st_mode)){
printf("%s\n", file_name);

newDir = dir_result->d_name;
newPath[0] = '\0';
strcat(newPath, path);
strcat(newPath, newDir);
strcat(newPath, "\\");
printf("%s\n", newPath);
subDirectory = opendir(newPath);
readdir(subDirectory);
// traverse();
}
}
/********** END OF CODE**********/

If I am way off the path to doing this correctly, suggestions would also be
very much welcome ....

TIA

ozo

"\%" is not a standard escape sequence

Raymun

void read() {
if( !readdir( directory )) {
traverse();
read();
}
}

int main() {
directory = opendir(path);
read();
}

ASKER CERTIFIED SOLUTION

Kent Olsen

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rockymagee

ASKER

I do not seem to be printing anything out ... do the changes you made have any effect on the main() ?

Also, it looks like we are trying to

subDirectory = opendir(newPath);

before we ever get it?

Thanks for your assistance :)

Raymun

I just realized you needed that dir_result.

void read() {
dir_result = readdir( directory );

if( !dir_result) {
traverse();
read();
}
}

int main() {
path = "C:\\";
printf("%s\n", path);
directory = opendir(path);
read();
getchar();
}

rockymagee

ASKER

Raymun,

I am not sure how the code you have given me fits into what I have already coded?

TIA

Raymun

#include <sys/stat.h>
// rest of includes...

char *path;
// rest of variables

void read() {
dir_result = readdir( directory );

if( !dir_result) {
traverse();
read();
}
}

int main() {
path = "C:\\";
printf("%s\n", path);
directory = opendir(path);
read();
getchar();
}

traverse() {
// traverse body
}

rockymagee

ASKER

Raymun .... getting the following errors when I try the

read()
main()
traverse()

order

::::

`void read()':
`traverse' undeclared (first use this function)

SOLUTION

Raymun

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rockymagee

ASKER

Raymun ... first off I really appreciate the help !

It is throwing an error on the strcat function now?
Are you able to compile this to see the same error?

Here is the code do far:

#include <sys/stat.h>
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>

char *path = "C:\\";;
char file_name[4096];
char *newDir;
char newPath[100];
DIR * directory;
DIR * subDirectory;
struct dirent *dir_result;
struct stat stat_buf;
int stat_result;

void traverse(){
sprintf(file_name, "%s\%s", path, dir_result->d_name);
stat_result = stat(file_name, &stat_buf);
if (S_ISDIR(stat_buf.st_mode)){
printf("%s\n", file_name);

newDir = dir_result->d_name;
newPath[0] = '\0';
strcat(newPath, path);
strcat(newPath, newDir);
strcat(newPath, "\\");
//printf("%s\n", newPath);
path = newPath;
//printf("%s\n", path);
//subDirectory = opendir(path);
//readdir(subDirectory);
//traverse();
}
}

void read() {
dir_result = readdir( directory );
if( !dir_result) {
traverse();
read();
}
}

int main() {
directory = opendir(path);
printf("%s\n", path);
read();
getchar();
}

Raymun

I don't have a compiler installed so you need to tell me what the errors are. If you getting an error about it not recognizing strcat then you also need

#include <string>