#include <stdbool.h>
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "util.h"

bool joinhome(char* res, char* path){
  char* homedir = getenv("HOME");

  if(NULL==homedir)
    return false;

  snprintf(res, PATH_MAX, "%s/%s", homedir, path);
  return true;
}

bool exists(char* path){
  return access(path, F_OK)==0;
}

bool endswith(const char *str, const char *suf){
  int strl = strlen(str);
  int sufl = strlen(suf);

  if (sufl >  strl)
    return false;

  return strncmp(str + strl - sufl, suf, sufl) == 0;
}

char* check_path(char* bin) {
  char* path = getenv("PATH");
  char* res = NULL;

  if(NULL == path)
    return NULL;
  path = strdup(path);

  char* p = strtok(path, ":");
  while(NULL != p) {
    char* fp = malloc(PATH_MAX);
    snprintf(fp, PATH_MAX, "%s/%s", p, bin);
    if(exists(fp)){
      res = fp;
      break;
    }
    p = strtok(NULL, ":");
  }

  free(path);
  return res;
}