HardenedBSD/usr.sbin/pccard/pccardc/pccardc.c

#include <stdio.h>
#include <stdlib.h>

typedef int (*main_t)(int , char **);

#define DECL(foo) int foo(int, char**);
DECL(dumpcis_main);
DECL(enabler_main);
DECL(help_main);
DECL(pccardmem_main);
DECL(rdmap_main);
DECL(rdreg_main);
DECL(wrattr_main);
DECL(wrreg_main);

struct {
	char *name;
	main_t func;
	char *help;
} subcommands[] = {

{ "dumpcis",	dumpcis_main,	"Prints CIS for all cards"},
{ "enabler",	enabler_main,	"Device driver enabler"},
{ "help",	help_main,	"Prints command summary"},
{ "pccardmem",	pccardmem_main,	"Allocate memory for pccard driver"},
{ "rdmap",	rdmap_main,	"Read pcic mappings"},
{ "rdreg",	rdreg_main,	"Read pcic register"},
{ "wrattr",	wrattr_main,	"Write byte to attribute memory"},
{ "wrreg",	wrreg_main,	"Write pcic register"},
{0, 0}
};

int
main(int argc, char **argv)
{
	int i;
	for(i=0; argc > 1 && subcommands[i].name; i++) {
		if (!strcmp(argv[1],subcommands[i].name)) {
			argv[1] = argv[0];
			return (*subcommands[i].func)(argc-1,argv+1);
		}
	}
	if (argc > 1)
		fprintf(stderr,"Unknown Subcommand.\n");
	return help_main(argc,argv);
}

int
help_main(int argc, char **argv)
{
	int i;
	fprintf(stderr,"Usage:\n");
	fprintf(stderr,"\t%s <subcommand> <arg> ...\n",argv[0]);
	fprintf(stderr,"Subcommands:\n");
	for(i=0; subcommands[i].name; i++) 
		fprintf(stderr,"\t%s\n\t\t%s\n",
			subcommands[i].name, subcommands[i].help);
	return 1;
}