Implement a Simple Shell Command Parser

Code

#include <stdio.h>
#include <ctype.h>

void parse_shell_input(char *line) {
    char first = true;
    while (*line)
    {
        while (*line == ' ')
            line++;
        int len = 0;
        while (line[len] && line[len] != ' ')
            len++;
        if (*line == 0 || *line == 127) // why is there a char 127 ??
            break;
        if (!first)
            printf("\n");
        printf("%.*s", len, line);
        first = false;
        line += len + 1;
    }
}

int main() {
    char line[101];
    fgets(line, sizeof(line), stdin);

    parse_shell_input(line);
    return 0;
}

Solving Approach