Lists up all the subdirectories in the current directory recursively.

simplefind.c

#include <stdio.h>
#include <string.h>
#include <dirent.h>

void list(const char *path)
{
    DIR *dir;
    struct dirent *entry;
    char entry_path[PATH_MAX];
    char *entry_name = entry_path;

    dir = opendir(path);
    if (NULL == dir) {
        return;
    }

    while ((*entry_name++ = *path++))
        ;
    --entry_name;
    *entry_name++ = '/';
    while (NULL != (entry = readdir(dir))) {
        if ('.' == *(entry->d_name)) {
            continue;
        }
        if (DT_DIR == entry->d_type) {
            strcpy(entry_name, entry->d_name);
            puts(entry_path);
            list(entry_path);
        }
    }
    closedir(dir);
}

int main ()
{
    list(".");
    return 0;
}

Use [F2] to change directory using peco

j() {
        dir=$(simplefind | peco) && cd $dir
}
bind -x '"\eOQ"':"j"