I'm Stuck on #MG5 of the Shell Building project

Challenges
1

I’m stuck on Stage #MG5.

I have done everything write I think but the test script tests for cat tool in “/usr/bin/” directory which is not possible since I’m on Windows. Is it not possible to pass this in Windows? Please provide me some solutions to pass this if possible. I have added my code below.

Here are my logs:

tester::#MG5] [setup] Files created:
[tester::#MG5] [setup] - /tmp/bee/my_exe (not executable)
[tester::#MG5] [setup] - /tmp/cow/my_exe (not executable)
[tester::#MG5] [setup] - /tmp/pig/my_exe (executable)
[tester::#MG5] Running ./your_program.sh
[your-program] $ type cat
[your-program] cat: not found
[tester::#MG5] ^ Line does not match expected value.
[tester::#MG5] Expected: "cat is /usr/bin/cat"
[tester::#MG5] Received: "cat: not found"
[your-program] $ 
[tester::#MG5] Test failed

And here’s a snippet of my code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

void check_executable(const char *arg) {

  // Fetching the PATH environment variable
  char *path_env = getenv("PATH");
  if(path_env == NULL) {
    printf("%s : not found\n", arg);
    return;
  }

  // coping the address to the PATH variable to be able to tokenize it
  char *path_copy = strdup(path_env);
  if(path_copy == NULL) {
    printf("Memory allocation failed\n");
    return;
  }

  // Tokenizing each directory in PATH
  char *dir= strtok(path_copy, ";");

  // Iterating through each directory
  while(dir != NULL) {
    size_t len= strlen(dir) + strlen(arg) + 2;
    char *full_path= malloc(len);
    if(full_path == NULL) {
      printf("Malloc failed!\n");
      free(path_copy);
      return;
    }

    snprintf(full_path, len, "%s/%s", dir, arg);       // constructing the full path

    if(access(full_path, X_OK) == 0) {                // check if the file exists AND has execute permission
      printf("%s is %s\n", arg, full_path);
      free(path_copy);
      free(full_path);
      return;
    }

    free(full_path);
    dir= strtok(NULL, ";");
  }

  free(path_copy);
  printf("%s: not found\n",arg);
}


int main(int argc, char *argv[])
{
  // Flush after every printf
  setbuf(stdout, NULL);
  //char *path_env = getenv("PATH");
  //printf("%s\n", path_env);
  while (1)
  {
    // TODO: Uncomment the code below to pass the first stage
    printf("$ ");
    char input[50];
    fgets(input, sizeof(input), stdin);
    input[strlen(input) - 1] = '\0'; // Remove the trailing newline character


    // Exit the shell if the user types "exit"
    if (strcmp(input, "exit") == 0)
    {
      break;
    }

    // Handle the "echo" command
    else if (strncmp(input, "echo", 4) == 0)
    {
      printf("%s\n", input + 5); // Print the string after "echo "
    }

    // Handle the "type" command
    else if (strncmp(input, "type", 4) == 0)
    {
      if (strcmp(input + 5, "echo") == 0)
      {
        printf("echo is a shell builtin\n");
      }
      else if (strcmp(input + 5, "type") == 0)
      {
        printf("type is a shell builtin\n");
      }
      else if (strcmp(input + 5, "exit") == 0)
      {
        printf("exit is a shell builtin\n");
      }
      else
      {
        check_executable(input + 5);
      }
    }


    else
    {
      printf("%s: command not found\n", input);
    }
  }

  return 0;
}
3

Hey @Jishnu-Ray, our test runners run on Linux, so Windows-specific behavior won’t necessarily match what the tester expects.

I’d recommend using WSL for local development and testing. That will give you a Linux environment that’s much closer to what runs on CodeCrafters and should make debugging these path-related issues much easier.

4

Oh I understand now, there was a bug in my code. Now all my test cases pass. Thanks for quick reply.