main.c

#include <setjmp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <readline/history.h>
#include <readline/readline.h>

#include "builtins.h"
#include "executor.h"
#include "prompt.h"
#include "aliases.h"
#include "parser.h"
#include "command.h"

sigjmp_buf ctrlc;

static void handler(int signo)
{
    if (signo == SIGINT)
    {
        signal_process(signo);
        printf("\n");
        siglongjmp(ctrlc, 1);
        exit(0);
    }
    else if (signo == SIGCHLD)
    {
        pid_t pid;
        int status;
        pid = waitpid(-1, &status, WNOHANG);
    }
}

void load_config()
{
    char buf[256];
    FILE *f = fopen(".dshrc", "r");

    if (!f)
        return;

    while (fgets(buf, sizeof(buf), f))
    {
        *(strchr(buf, '\n')) = 0;
        Command *c = parse(buf);
        run(c);
        free_cmds(c);
    }
    fclose(f);
}

int main()
{
    signal(SIGINT, handler);
    signal(SIGCHLD, handler);

    char *input;
    char *prompt;
    load_config();

    sigsetjmp(ctrlc, 1);

    while (1)
    {
        prompt = get_prompt();
        input = readline(prompt);
        free(prompt);

        if (!input) // EOF
        {
            printf("\n");
            break;
        }

        if (input[0] != 0) add_history(input);

        Command *c = parse(input);
        run(c);
        free_cmds(c);
        free(input);
    }
    return 0;
}