CeDOS - src/shell/shelf.c

src/shell/shelf.c (view raw)

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#include "cedos.h"
#include "stdio.h"

#include <stdint.h>

int read_line(char *buffer) {
    int i = 0;
    char c;
    buffer[0] = 0;
    while (1) {
        c = getchar();

        if (c == '\n') { break; }
        if (c == 0) { continue; }
        if (c == 0x08 && i <= 0) { continue; }

        if (c == 0x08) {
            buffer[--i] = 0;
            putchar(c);
        } else {
            buffer[i++] = c;
            putchar(c);
        }
    }

    buffer[i] = 0;
    putchar(c);

    return i;
}

void main(char *args) {
    uint32_t a = 0, b = 1, i = 0;
    printf("\n");
    printf("ShELF shell interface for CeDOS\n");
    printf("Version: " VERSION "\n");

    while (1) {
        printf("/> ");

        char buffer[256];
        int length = read_line(buffer);

        if (length == 0) { continue; }

        char *file = buffer;
        char *args = (char *)(0);

        int i = 0;
        while (buffer[i]) {
            if (buffer[i] == ' ') {
                buffer[i] = 0;
                args = &(buffer[i+1]);
                break;
            }

            i++;
        }

        //printf("Executing %s...\n", buffer);

        int pid = process_spawn(file, args);

        //printf("Child process %i spawned, waiting for termination...\n", pid);

        if (pid == -1) {
            printf("File not found: %s\n", buffer);
        } else {
            process_wait(pid);
        }

        //printf("Child process %i terminated.\n", pid);
    }
}