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keep track of the last 10 commands the user typed

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# 1  
Old 09-17-2006
keep track of the last 10 commands the user typed
Can I do it like this?

Code:
if (strcmp(argv[0], "history")==0)
                        {
                        argv[1] = "10";
                        execvp(argc[0],argv);
                        }

actually, it doesn't work,

How can I modify it?

Thanks
# 2  
Old 09-17-2006
What exactly are you trying to do? Are you supposed to take the action when the user gives in "history" as the command?

Another thing, what is argc[0]? Is argc also an array?
# 3  
Old 09-18-2006
I am implementing a UNIX shell program. It should be able to keep track of the last 10 commands the user typed. For instance, I input the command "history" at the prompt, the result will be displayed.

I try to use system call. However I don't know how to do it.
# 4  
Old 09-18-2006
Use "fc -l" to show a history of the last commands. Also "argv[0]" is the name of the program you are executing; "argv[1]" is the first parameter on the command line (argv[i] is the i-th parameter on the command line!)
ALTRUNVRSOFLN
# 5  
Old 09-18-2006
I mean the shell should provide a command "history" to display the last 10 commands a user typed.

So it needs to be programmed with c language.
How to do it?
# 6  
Old 09-18-2006
zhshqzyc

"fc" is the shell command to display - do "man fc"
ALTRUNVRSOFLN
# 7  
Old 09-18-2006
THANKS,
But You misunderstood my meaning.
Normally at unix prompt, you type "history" command, it will display all the commands you typed.
However I just want to display exactly 10 commands with exactly typed "history" command,
it means it must be programmed by system call.
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