view toys/other/hello.c @ 1150:ac4a0cde89c2 draft

Don't permute toys.optargs, cleanup code (xexec()) can free it.
author Rob Landley <>
date Thu, 19 Dec 2013 21:38:12 -0600
parents a25239480e7a
children 6ca31490f581
line wrap: on
line source

/* hello.c - A hello world program. (Template for new commands.)
 * Copyright 2012 Rob Landley <>
 * See
 * See

// Accept many different kinds of command line argument:

USE_HELLO(NEWTOY(hello, "(walrus)(blubber):;(also):e@d*c#b:a", TOYFLAG_USR|TOYFLAG_BIN))

config HELLO
  bool "hello"
  default n
    usage: hello [-a] [-b string] [-c number] [-d list] [-e count] [...]

    A hello world program.  You don't need this.

    Mostly used as an example/skeleton file for adding new commands,
    occasionally nice to test kernel booting via "init=/bin/hello".

#define FOR_hello
#include "toys.h"

// Hello doesn't use these globals, they're here for example/skeleton purposes.

  char *b_string;
  long c_number;
  struct arg_list *d_list;
  long e_count;
  char *also_string;
  char *blubber_string;

  int more_globals;

// Parse many different kinds of command line argument:

void hello_main(void)
  char **optargs;

  printf("Hello world\n");

  if (toys.optflags) printf("flags=%x\n", toys.optflags);
  if (toys.optflags & FLAG_a) printf("Saw a\n");
  if (toys.optflags & FLAG_b) printf("b=%s\n", TT.b_string);
  if (toys.optflags & FLAG_c) printf("c=%ld\n", TT.c_number);
  while (TT.d_list) {
    printf("d=%s\n", TT.d_list->arg);
    TT.d_list = TT.d_list->next;
  if (TT.e_count) printf("e was seen %ld times\n", TT.e_count);
  for (optargs = toys.optargs; *optargs; optargs++)
    printf("optarg=%s\n", *optargs);
  if (toys.optflags & FLAG_walrus) printf("Saw --walrus\n");
  if (TT.blubber_string) printf("--blubber=%s\n", TT.blubber_string);