How does a shell work
What are a pid and a ppid
How to manipulate the environment of the current process
What is the difference between a function and a system call
How to create processes
What are the three prototypes of main
How does the shell use the PATH to find the programs
How to execute another program with the execve system call
How to suspend the execution of a process until one of its children terminates
What is EOF / “end-of-file”?
How to redirect the content of a file into another file
What is a pipeline
How to setup a pipe
How to setup a pipe between two processes
You have to provide a Makefile in order to compile your program
Your Makefile must define the all rule: The all rule should compile and link the source code to generate the executable hsh
Make sure your program compiles on Ubuntu 14.04 LTS, with gcc 4.8.4
You must compile using the flags -Wall -Werror -Wextra and -pedantic
Your executable must be named: hsh
`$ make`
$ exit
Terminate the program
$ XD
Put a smile on your face.
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-X---------X---DDDDDD-----
---X-----X-----D------D---
-----X-X-------D-------D--
------X--------D-------D--
-----X-X-------D-------D--
---X-----X-----D------D---
-X---------X---DDDDDDD----
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$ env
Prints environtment variables
$ cd
Change current proccess directory
options
- Previous directory
. Same directory
.. Parent directory
~ Home directory