/*
?*??linux/tools/build.c
?*
?*??（C）?1991??Linus?Torvalds
?*/

/*
?*?This?file?builds?a?disk-image?from?three?different?files:
?*
?*?-?bootsect:?max?510?bytes?of?8086?machine?code?loads?the?rest
?*?-?setup:?max?4?sectors?of?8086?machine?code?sets?up?system?parm
?*?-?system:?80386?code?for?actual?system
?*
?*?It?does?some?checking?that?all?files?are?of?the?correct?type?and
?*?just?writes?the?result?to?stdout?removing?headers?and?padding?to
?*?the?right?amount.?It?also?writes?some?system?data?to?stderr.
?*/

/*
?*?Changes?by?tytso?to?allow?root?device?specification
?*/

#include?	/*?fprintf?*/
#include?
#include?	/*?contains?exit?*/
#include?	/*?unistd.h?needs?this?*/
#include?
#include?
#include?	/*?contains?read/write?*/
#include?

/*
?*?Changes?by?falcon?to?define?MAJOR?and?MINOR?for?they
?*?are?not?defined?in?current?linux?header?file?linux/fs.hI?copy?it?from
?*?include/linux/fs.h?directly.
?*/

#ifndef?MAJOR
	#define?MAJOR（a）?（（（unsigned）（a））>>8）
#endif
#ifndef?MINOR
	#define?MINOR（a）?（（a）&0xff）
#endif

#define?MINIX_HEADER?32
#define?GCC_HEADER?1024

#define?SYS_SIZE?0x3000

/*
?*?Changes?by?falcon?to?let?this?kernel?Image?file?boot
?*?with?a?root?image?file?on?the?first?hardware?device?/dev/hd1?hence?you
?*?should?prepare?a?root?image?file?and?configure?the?bochs?with
?*?the?following?lines（please?set?the?...?as?suitable?info）:
?*?	...
?*??????floppya:?1_44=“Image“?status=inserted
?*??????ata0-master:?type=disk?path=“/path/to/rootimage.img“?mode=flat?...
?*??????...
?*/

#define?DEFAULT_MAJOR_ROOT?3
#define?DEFAULT_MINOR_ROOT?1

/*?max?nr?of?sectors?of?setup:?don‘t?change?unless?you?also?change
?*?bootsect?etc?*/
#define?SETUP_SECTS?4

#define?STRINGIFY（x）?#x

void?die（char?*?str）
{
	fprintf（stderr“%s\n“str）;
	exit（1）;
}

void?usage（void）
{
	die（“Usage:?build?bootsect?setup?system?[rootdev]?[>?image]“）;
}

int?main（int?argc?char?**?argv）
{
	int?icid;
	char?buf[1024];
	char?major_root?minor_root;
	struct?stat?sb;

	if?（（argc?!=?4）?&&?（argc?!=?5））
		usage（）;
	if?（argc?==?5）?{
		if?（strcmp（argv[4]?“FLOPPY“））?{
			if?（stat（argv[4]?&sb））?{
				perror（argv[4]）;
				die（“Couldn‘t?stat?root?device.“）;
			}
			major_root?=?MAJOR（sb.st_rdev）;
			minor_root?=?MINOR（sb.st_rdev）;
		}?else?{
			major_root?=?0;
			minor_root?=?0;
		}
	}?else?{
		major_root?=?DEFAULT_MAJOR_ROOT;
		minor_root?=?DEFAULT_MINOR_ROOT;
	}
	fprintf（stderr?“Root?device?is?（%d?%d）\n“?major_root?minor_root）;
	if?（（major_root?!=?2）?&&?（major_root?!=?3）?&&
	????（major_root?!=?0））?{
		fprintf（stderr?“Illegal?root?device?（major?=?%d）\n“
			major_root）;
		die（“Bad?root?device?---?major?#“）;
	}
	for?（i=0;i	if?（（id=open（argv[1]O_RDONLY0））<0）
		die（“Unable?to?open?‘boot‘“）;
	if?（read（idbufMINIX_HEADER）?!=?MINIX_HEADER）
		die（“Unable?to?read?header?of?‘boot‘“）;
	if?（（（long?*）?buf）[0]!=0x04100301）
		die（“Non-Min

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-07-07?23:15??操作系統\
?????目錄???????????0??2015-07-07?23:15??操作系統\lab1\
?????文件????????5094??2014-10-11?16:16??操作系統\lab1\bootsect.s
?????文件????????5298??2014-10-11?12:04??操作系統\lab1\build.c
?????文件?????????482??2014-10-12?16:11??操作系統\lab1\report.txt
?????文件????????4479??2014-10-12?21:00??操作系統\lab1\setup.s
?????目錄???????????0??2015-07-07?23:15??操作系統\lab2\
?????文件?????????432??2014-10-19?11:11??操作系統\lab2\iam.c
?????文件?????????915??2014-10-19?11:55??操作系統\lab2\report.txt
?????文件????????2657??2014-10-18?23:02??操作系統\lab2\sys.h
?????文件????????5229??2014-10-18?23:02??操作系統\lab2\system_call.s
?????文件????????6462??2014-10-18?23:34??操作系統\lab2\unistd.h
?????文件?????????719??2014-10-19?11:29??操作系統\lab2\who.c
?????文件?????????407??2014-10-19?11:35??操作系統\lab2\whoami.c
?????目錄???????????0??2015-07-07?23:15??操作系統\lab3\
?????文件????????4312??2014-10-22?17:06??操作系統\lab3\exit.c
?????文件????????3846??2014-10-22?17:03??操作系統\lab3\fork.c
?????文件????????5596??2014-10-22?16:58??操作系統\lab3\main.c
?????文件????????1994??2014-10-22?17:48??操作系統\lab3\printk.c
?????文件????????2774??2014-10-26?10:19??操作系統\lab3\process.c
?????文件????????1436??2014-10-26?11:00??操作系統\lab3\report.txt.txt
?????文件????????9240??2014-10-22?17:46??操作系統\lab3\sched.c
?????目錄???????????0??2015-07-07?23:15??操作系統\lab4\
?????文件?????????327??2014-11-09?23:09??操作系統\lab4\report.txt
?????目錄???????????0??2015-07-07?23:15??操作系統\lab4\untitled?folder\
?????文件????????2292??2014-11-09?22:29??操作系統\lab4\untitled?folder\pc.c
?????文件?????????309??2014-11-09?23:03??操作系統\lab4\untitled?folder\report.txt
?????文件?????????478??2014-11-09?23:14??操作系統\lab4\untitled?folder\sem.c
?????文件????????2762??2014-11-09?19:22??操作系統\lab4\untitled?folder\sys.h
?????文件????????5229??2014-11-09?19:20??操作系統\lab4\untitled?folder\system_call.s
?????文件????????6546??2014-11-09?23:01??操作系統\lab4\untitled?folder\unistd.h
............此處省略244個文件信息