view lib/help.c @ 990:8caeba551a28

This is the preliminary version of lspci text output support (the location of pci.ids is hard-coded to /usr/share/misc/pci.ids, as found on Debian/Ubuntu). +88 lines in two files, including reformatting, comments, whitespace, and build configuration as well as new code. The changes: -Add library code to look up descriptions. -Add a counter for -n (for the sake of -nn) -Add the file stream "db" to GLOBALS and open it conditionally -Add name fields to bufs -Look up text if enabled and -n is passed never or twice -Print text if lookup succeeded
author Isaac Dunham <idunham@lavabit.com>
date Wed, 07 Aug 2013 11:51:26 -0500
parents c5e80c74ec6c
children c51a4dbe5db7
line wrap: on
line source

// Function to display help text

#include "toys.h"

#if !CFG_TOYBOX_HELP
void show_help(void) {;}
#else
#include "generated/help.h"

#undef NEWTOY
#undef OLDTOY
#define NEWTOY(name,opt,flags) help_##name "\0"
#define OLDTOY(name,oldname,opts,flags) "\xff" #oldname "\0"
static char *help_data =
#include "generated/newtoys.h"
;

void show_help(void)
{
  int i = toys.which-toy_list;
  char *s;

  for (;;) {
    s = help_data;
    while (i--) s += strlen(s) + 1;
    // If it's an alias, restart search for real name
    if (*s != 255) break;
    i = toy_find(++s)-toy_list;
  }

  fprintf(toys.exithelp ? stderr : stdout, "%s", s);
}
#endif