anybody can do this project????

ragux · 06-27-2006, 03:41 AM

buildin a simple a shellobjective

to be able to recongnise and understand:
1. the use of systeam calls
2. how commands are interpreted in a UNIX like shell
3. the use of environment variables

procedure

Develop a simple UNIX/LINUX like Shell which satisfies the following requirments.

1. output a promt to the stdout (standard output).USe the '?' symbol as the promt.

2. The Shell must always wait for the previous command to finish before displaying another promt.

4.the command should be capable of accepting parameters.
a.E.g: ?ls-l
5.
a. fork a new process

b. The parant process will wait until the child get terminated

c. the child process will pharse the line of input to extract external command

d. the child process will interpret the first word in the input string as the
external command and should check whether the file name is existing

e. the location of the desired program can be identified by looking at the path
variable for given program

f.if the filename exist the child will execute the filename using systeam calls such as
execve,excepl,execv,execvp,etc.(you may need to find the most appropriate systeam call for your shell).

g.after the child terminate the parent resumes its operation and ready to accept another command

6. shell should bsupport cd and pwd internal commands

a.you may use the echo $PATH and $PWD commands to get values of above variable.

b.you may also use the gentenv and setenv procedures.

7. NO need of supporting input output redirection or piping.

8.the shell should intrrupt (stop) when Ctrl+D is pressed

Nylex · 06-27-2006, 03:55 AM

Yeah, there probably is someone that can do it. You're supposed to "be able to recognise and understand" that list of things. How is getting someone to do it for you going to help you with that? If you're stuck on something and need help, give info about what it is you need help with. Please don't ask people to do work for you.

jlliagre · 06-27-2006, 04:03 AM

Quote:

8.the shell should intrrupt (stop) when Ctrl+D is pressed

This is expected to be Ctrl-C, a typo in your assignment ?

prozac · 06-27-2006, 04:59 AM

CTRL+D will log you out!

jtshaw · 06-27-2006, 06:12 AM

If you have specific questions like "I'm trying to do this fork and exec here and for some reason the child is going defunct" feel free to ask.

Nobody here wants to do your homework assignment for you.

Please take some time to read our rules.

acid_kewpie · 06-27-2006, 06:48 AM

HAHAHAHAHA nice one.