LXR toybox/lib/help.c

   1// Function to display help text
   2
   3#include "toys.h"
   4
   5#include "generated/help.h"
   6
   7#undef NEWTOY
   8#undef OLDTOY
   9#define NEWTOY(name,opt,flags) HELP_##name "\0"
  10#if CFG_TOYBOX
  11#define OLDTOY(name,oldname,flags) "\xff" #oldname "\0"
  12#else
  13#define OLDTOY(name, oldname, flags) HELP_##oldname "\0"
  14#endif
  15static char *help_data =
  16#include "generated/newtoys.h"
  17;
  18
  19void show_help(FILE *out, int full)
  20{
  21  int i = toys.which-toy_list;
  22  char *s, *ss;
  23
  24  if (!(full&2))
  25    fprintf(out, "Toybox %s" USE_TOYBOX(" multicall binary")
  26                 ": https://landley.net/toybox"
  27                 USE_TOYBOX(" (see toybox --help)") "\n\n", toybox_version);
  28
  29  if (CFG_TOYBOX_HELP) {
  30    for (;;) {
  31      s = help_data;
  32      while (i--) s += strlen(s) + 1;
  33      // If it's an alias, restart search for real name
  34      if (*s != 255) break;
  35      i = toy_find(++s)-toy_list;
  36    }
  37
  38    if (full) fprintf(out, "%s\n", s);
  39    else {
  40      strstart(&s, "usage: ");
  41      for (ss = s; *ss && *ss!='\n'; ss++);
  42      fprintf(out, "%.*s\n", (int)(ss-s), s);
  43    }
  44  }
  45}
  46