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/* ----------------------------------------------------------------------- *
*
* Copyright 2010 Gert Hulselmans - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston MA 02110-1301, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* whichsys.c
*
* Detemine which command to execute, based on the Syslinux bootloader variant
* from which you run it.
*
* Usage: whichsys.c32 [-iso- command] [-pxe- command] [-sys- command]
* Examples: whichsys.c32 -iso- chain.c32 hd0 -sys- chain.c32 hd1 swap
* whichsys.c32 -iso- config iso.cfg -pxe- config pxe.cfg
*
*/
#include <stdio.h>
#include <alloca.h>
#include <console.h>
#include <string.h>
#include <syslinux/boot.h>
#include "syslinux/config.h"
static struct syslinux_parameter {
char **arg[1];
bool option;
} isolinux, pxelinux, syslinux;
/* XXX: this really should be librarized */
static void boot_args(char **args)
{
int len = 0, a = 0;
char **pp;
const char *p;
char c, *q, *str;
for (pp = args; *pp; pp++)
len += strlen(*pp) + 1;
q = str = alloca(len);
for (pp = args; *pp; pp++) {
p = *pp;
while ((c = *p++))
*q++ = c;
*q++ = ' ';
a = 1;
}
q -= a;
*q = '\0';
if (!str[0])
syslinux_run_default();
else
syslinux_run_command(str);
}
static void usage(void)
{
static const char usage[] = "\
Usage: whichsys.c32 [-iso- command] [-pxe- command] [-sys- command]\n\
Examples: whichsys.c32 -iso- chain.c32 hd0 -sys- chain.c32 hd1 swap\n\
whichsys.c32 -iso- config iso.cfg -pxe- config pxe.cfg\n";
fprintf(stderr, usage);
}
int main(int argc, char *argv[])
{
const union syslinux_derivative_info *sdi;
int arg = 0;
openconsole(&dev_null_r, &dev_stdcon_w);
/* If no argument got passed, let's show the usage */
if (argc == 1) {
usage();
return 0;
}
arg++;
while (arg < argc) {
if (!strcmp(argv[arg], "-iso-")) {
argv[arg] = NULL;
isolinux.arg[0] = &argv[arg + 1];
isolinux.option = true;
}
if (!strcmp(argv[arg], "-pxe-")) {
argv[arg] = NULL;
pxelinux.arg[0] = &argv[arg + 1];
pxelinux.option = true;
}
if (!strcmp(argv[arg], "-sys-")) {
argv[arg] = NULL;
syslinux.arg[0] = &argv[arg + 1];
syslinux.option = true;
}
arg++;
}
sdi = syslinux_derivative_info();
switch (sdi->c.filesystem) {
case SYSLINUX_FS_ISOLINUX:
isolinux.option ? boot_args(isolinux.arg[0]) : fprintf(stderr, "No command specified for ISOLINUX.\n\n"); usage();
break;
case SYSLINUX_FS_PXELINUX:
pxelinux.option ? boot_args(pxelinux.arg[0]) : fprintf(stderr, "No command specified for PXELINUX.\n\n"); usage();
break;
case SYSLINUX_FS_SYSLINUX:
syslinux.option ? boot_args(syslinux.arg[0]) : fprintf(stderr, "No command specified for SYSLINUX.\n\n"); usage();
break;
case SYSLINUX_FS_UNKNOWN:
default:
fprintf(stderr, "Unknown Syslinux filesystem\n\n");
}
return -1;
}
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