readme.bak

linuxunix 下的c语言实现

Introduction
============

This is CORAL SHELL, version 0.01.  Bash is the DLMU Computer S&T Alex Wang 
(Yaodong), a particlly implementation of the POSIX shell spec, but also with 
interactive command line editing,and a slew of other features. For more 
information on the features of CORAL that are new to this type of shell, see the 
command `help'.  There is also a large details for each usage.  The man page is 
the definitive description of the shell's features. 

CORAL is free software, distributed under the terms of the [DLMU]
IT Tec. More, do not parate copyright of author.

To compile CORAL, try typing `make all', CORALauto-configures the build process, 
so no further intervention should be necessary.  CORAL SHELL builds with `gcc' 
by default if it is available.  Default debugging envriment is under Red Hat9.0 
OS. IF you want  compile manually by gcc , use following:

	gcc -o XXX_mysh XXX_mysh.c

Read the file MAKEFILE in this directory for more information about how to 
customize and control the build process.


Mainframe
==============

If you are insterested of CORAL SHELL 's code implementment , or as a coder to 
deeping understand the program, here will show out the main structure . The main 
program under such project :  promt on screen , capture user command , parse 
command, then executing. Similary phoney code following:

	while(1) {

	       print_prompt();

	       get_input();

	       parse_input();

	       if(“logout” || “exit”)

		      break;

	       do_cmd();

	}



Manusript
==============

This chapter briefly summarizes the shell's commands, control structures, shell 
functions,
* For details usage for commands ,input 'help [command]'
	CoralShell commands include: ls echo cat mkdir rm cd chmod pwd wc date 
	exit help kill who history systeminfo

@ ls [-l]
	-l: for long message to output

@ echo [varity]

@ mkdir [dir]

@ rm [fiel | dir]

@ printf   cd [dir]

@ chmod [prevlege] [file | dir]
	For example: chmod 777 hello.c
	'777' will give hello.c full previlege.

@ pwd [dir]	
	print  current directory

@ wc [-c | -l] [file | dir]
	  -c: number of bytes or characters
	  -l: number of lines

@ date   
	Cmmand will show localtime

@ time [cmmand]
	show Command excecute time.
	For exam: time date

@ exit  
	Quit CoralShell

@ help [cmmand]
	Use 'help' to show all commands in Coral shell
	Also use 'help command' to show details for each command

@ kill [-1 | -9 | -15] [pid]
	-1: sighup
	-9: sigkill
	-15: sigterm

@ echo [varity]

@ Show     
	all command used.

@ system 
	message such as CPU, Memory ...

@ clear
	just use 'clear' to clean screen



If you would like to give me any suggestion , send mail
to [e-mail]

Enjoy!

Alex Wang   2008.5.1