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Rewrite ls (linux) in C

bibounder -  
Sugel Posted messages 4293 Registration date   Status Membre Last intervention   -
Hello,
I have a project to complete, which is to recode the "ls" command found in Linux.
Okay, this topic has already been addressed in other threads, but the problem is that we are not allowed to use printf, scanf, and all the other functions that would simplify our lives.
I have absolutely no idea where to start. Thank you in advance.

4 réponses

Réponse 1 / 4
fiddy Posted messages 441 Registration date   Status Contributeur Last intervention   1 847
 
Hello,

You need to see exactly what you are allowed...
System function (like read())? A few standard functions (like fread())?
Etc.
Best regards,
--

Google is your friend
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Réponse 2 / 4
sambia39 Posted messages 610 Registration date   Status Membre Last intervention   50
 
Good evening
To begin with, "LS" is not a function but a program that we call to list a directory and which takes arguments, and if other functions are prohibited for you, then you can use write for example

--
All knowledge is an answer to a question.
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fiddy Posted messages 441 Registration date   Status Contributeur Last intervention   1 847
 
Nobody said that it was a function ;-).
Then you have to see if fwrite() or write() is allowed...
And others too like readdir() and so on.
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sambia39 Posted messages 610 Registration date   Status Membre Last intervention   50
 
Not wrong :-)
but well, if it's just printf and the like that shouldn't be used, the rest is allowed.
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fiddy Posted messages 441 Registration date   Status Contributeur Last intervention   1 847
 
It all depends on what "company" means... I'm particularly thinking of system functions.
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sambia39 Posted messages 610 Registration date   Status Membre Last intervention   50
 
So if that's the case, let's go through the function 
 int printk()

but be careful, this one is reserved for the system itself, the kernel, drivers, etc.
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fiddy Posted messages 441 Registration date   Status Contributeur Last intervention   1 847
 
If system functions are allowed, then use the write() function which has the advantage of being POSIX. Hence my very first post :-))).
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Réponse 3 / 4
Sugel Posted messages 4293 Registration date   Status Membre Last intervention   728
 
You, you are at Epitech, you!

Start by recoding getchar and putchar, functions that allow you to respectively get and display a character.

Then, look towards the system APIs to list a directory.

Finally, you will need to work with structures and linked lists...

I'll leave you to search!

--
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"Fear leads to anger. Anger leads to hate. And hate... leads to suffering." - Yoda
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Réponse 4 / 4
Thomato87 Posted messages 117 Status Membre 16
 
At Epitech, we've already covered this topic; I think it’s more like 42 ;)
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Sugel Posted messages 4293 Registration date   Status Membre Last intervention   728
 
possible !
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