Linux Joystick Mapper Git

#include <libgen.h>
#include <stdio.h>
#include <string.h>
#include "parser.h"

char *base_directory = NULL;
char base_directory_storage[256];

FILE *open_file(char *name) {
    char temppath[256];
    char *environ = NULL;
    char paths[4096];
    char *path;
    FILE *file = NULL;
    int len = 0;
    int i;

    if (name[0] == '/') {
        return fopen(name, "r");
    }

    file = fopen(name, "r");
    if (file != NULL) {
        return file;
    }

    if (base_directory != NULL) {
        strcpy(temppath, base_directory);
        strcat(temppath, "/");
        strcat(temppath, name);
        file = fopen(temppath, "r");
        if (file != NULL) {
            return file;
        }
    }

    environ = getenv("JOYMAP_PATH");
    if (environ == NULL) {
        return fopen(name, "r");
    }
    strcpy(paths, environ);
    len = strlen(paths);
    for (i=0; i<len; i++) {
        if (paths[i] == ':') {
            paths[i] = '\0';
        }
    }
    path = paths;
    i = 0;
    while (i<len) {
        strcpy(temppath, path);
        strcat(temppath, "/");
        strcat(temppath, name);
        file = fopen(temppath, "r");
        if (file != NULL) {
            return file;
        }
        i += strlen(path) + 1;
        path = paths + i;
    }
    return fopen(name, "r");
}

void set_base_directory(char *filename) {
    char temppath[256];
    char *dir = NULL;
    if (filename == NULL) {
        base_directory = NULL;
        return;
    }
    strcpy(temppath, filename);
    dir = dirname(temppath);
    strcpy(base_directory_storage, dir);
    base_directory = base_directory_storage;
}