Mercurial > hg > toybox
view lib/help.c @ 1565:a3500bd8b322 draft
Fixups for the android/bionic build probes patch.
The CFG_* symbols are always defined so if() can use them as compile-time
constants, so don't if defined() them.
Doing USE_BLAH() around variable definitions opens up the same potential for
config-dependent build breaks as #ifdefs do, just make the whole command
depend on the symbol for now, factor out the utmpx infrastructure later.
The PTY probe was always failing because it used NULL without #including
the header that defines it. Substitute 0 instead.
author | Rob Landley <rob@landley.net> |
---|---|
date | Wed, 19 Nov 2014 16:55:12 -0600 |
parents | c51a4dbe5db7 |
children | 5fac2769a159 |
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; if (!CFG_TOYBOX) { s = xmprintf("See %s --help\n", ++s); break; } i = toy_find(++s)-toy_list; } fprintf(toys.exithelp ? stderr : stdout, "%s", s); } #endif