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