Thread: Creating shell in linux

This is what so far i did

Code:

 #include <stdio.h>#include <string.h>
#include <ctype.h>
#include <bsd/string.h>

int
main(void)
{
    char line[100];
    fgets(line, sizeof line, stdin);    // read in one line
                                        // from the user

    char words[3][100];
                        // we are able to store 3 words in
                        // this array, each one 100 characters
                        // in length
                        
    int last_was_space = 1;
    int begin = 0;
    int word = 0;
    for (int i = 0; i < strlen(line); i++) {
        if (last_was_space) {
            begin = i;
        }
        if (isspace(line[i])) {
            strlcpy(words[word], line + begin, i - begin + 1);
            word++;
            last_was_space = 1;
        } else {
            last_was_space = 0;
        }
    }

    char *words_p[3];
    for (int i = 0; i < sizeof words / sizeof *words; i++) {
        words_p[i] = words[i];
    }

    for (int i = 0; i < word; i++) {
        printf("%s\n", words_p[i]);
    }
    return 0; }

need help to do this

• Using the fork(), execvp() and waitpid() system calls, launches the requested program and waits until the program has finished

good work so far...but don't know how to do it