aosp12/external/toybox/lib/help.c

46 lines
1.0 KiB
C

// Function to display help text
#include "toys.h"
#include "generated/help.h"
#undef NEWTOY
#undef OLDTOY
#define NEWTOY(name,opt,flags) HELP_##name "\0"
#if CFG_TOYBOX
#define OLDTOY(name,oldname,flags) "\xff" #oldname "\0"
#else
#define OLDTOY(name, oldname, flags) HELP_##oldname "\0"
#endif
static char *help_data =
#include "generated/newtoys.h"
;
void show_help(FILE *out, int full)
{
int i = toys.which-toy_list;
char *s, *ss;
if (!(full&2))
fprintf(out, "Toybox %s" USE_TOYBOX(" multicall binary")
": https://landley.net/toybox"
USE_TOYBOX(" (see toybox --help)") "\n\n", toybox_version);
if (CFG_TOYBOX_HELP) {
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;
}
if (full) fprintf(out, "%s\n", s);
else {
strstart(&s, "usage: ");
for (ss = s; *ss && *ss!='\n'; ss++);
fprintf(out, "%.*s\n", (int)(ss-s), s);
}
}
}