command/whoami.c


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#include "command.h"
#include "lslib.h"

#include <pwd.h>
#include <stdlib.h>
#include <unistd.h>

static void help(void) {
    printf("Usage: whoami\n\n");
    printf("Print the username associated with the current effective user id\n");
    exit(EXIT_SUCCESS);
}

COMMAND(whoami_main) {

    uid_t usr;
    struct passwd* passwd;

    parse_help(argc, argv, help);

    usr = getuid();
    passwd = getpwuid(usr);
    
    if (passwd == NULL) {
        printf("\x1b[1;91myou do not exist.\n");
    } else {
        printf("%s\n", passwd->pw_name);
    }
    return EXIT_SUCCESS;
}