main.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
 
#define HTTPD_VERSION "1.0"
 
#define IS_OPTARG(a, s, l) a[1] == s || \
                     strcmp(a + 1, "-" l) == 0
 
static const char *prg_name;
static const char *srv_dir = "/var/html";
 
static void
version(void)
{
    printf("%s (QDNix) v%s\n", prg_name, HTTPD_VERSION);
    printf("Copyright (C) 2023 d0p1\n");
    printf("License BSD-3: <https://directory.fsf.org/wiki/License:BSD-3-Clause>\n");
    printf("This is free software: you are free to change and redistribute it.\n");
    printf("There is NO WARRANTY, to the extent permitted by law.\n");
    exit(EXIT_SUCCESS);
}
 
static void
usage(int retval)
{
    printf("Usage: %s [OPTION].. [DIR]\n\n", prg_name);
    printf("Arguments:\n");
    printf("\tDIR\t\tHTML page directory (default: %s)\n", srv_dir);
    printf("\tOptions:\n");
    printf("\t-h,--help\tdisplay this menu and exit\n");
    printf("\t-V,--version\toutput version information and exit\n");
    exit(retval);
}
 
int
main(int argc, char *const argv[])
{
    size_t idx;
 
    prg_name = *argv++;
    argc--;
 
    signal(SIGPIPE, SIG_IGN);
 
    for (idx = 0; idx < argc; idx++)
    {
        if (IS_OPTARG(argv[idx], 'V', "version"))
        {
            version();
        }
        if (IS_OPTARG(argv[idx], 'h', "help"))
        {
            usage(EXIT_SUCCESS);
        }
    }
    return (EXIT_SUCCESS);
}