mini_shell.c

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>

#define MAX_ARGS 20

int main() {
    char input[256];

    while (1) {
        printf("Mini-Shell> ");
        fflush(stdout);
        if (!fgets(input, sizeof(input), stdin))
            break;
        input[strcspn(input, "\n")] = '\0';
        if (strlen(input) == 0) continue;
        if (strcmp(input, "exit") == 0) {
            break;
        }

        char *args[MAX_ARGS];
        int i = 0;
        char *token = strtok(input, " ");
        while (token != NULL && i < MAX_ARGS - 1) {
            args[i++] = token;
            token = strtok(NULL, " ");
        }
        args[i] = NULL;
        int pid = fork();
        if (pid == 0) {
            execvp(args[0], args);
            perror("exec failed");
            exit(1);
        } else if (pid > 0) {
            wait(NULL);
        } else {
            perror("fork failed");
        }
    }
    return 0;
}