Linux Shell

Comments

• abhijitpai

  September 2004

  Do rm, mv, cp, ls etc. classify as shell commands (commands to be handled by the shell) ?
  
• rakeshkumardas

  October 2006

  : Do rm, mv, cp, ls etc. classify as shell commands (commands to be handled by the shell) ?
  :
  
  do any body have the source code of the linux shell?
  i am also developing the same.
  so it will helpful to me.
  Regards Rakesh
  
• nugent

  October 2006

  there is no "linux shell" but there are many shells available for linux including:
  
  bash: http://www.gnu.org/software/bash/ (or http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html)
  (this is the most popular shell)
  
  korn: http://www.kornshell.com/
  
  tcsh: http://www.tcsh.org/Welcome
  
  you find a list of available shells by typing "cat /etc/shells" at the command line.
  
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  nugent
  
  
  
  
• rakeshkumardas

  October 2006

  actually i am trying to develope a simple shell in linux which supports these commands below.so can u help me with some useful links or code segments.
  ------------------
  Internal Commands
  cd
  pwd
  exit
  help
  dir
  clear
  history
  ------------------
  External Commands
  kill
  echo
  ------------------
  
  Regards
  Rakesh
  : there is no "linux shell" but there are many shells available for linux including:
  :
  : bash: http://www.gnu.org/software/bash/ (or http://cnswww.cns.cwru.edu/~chet/bash/bashtop.html)
  : (this is the most popular shell)
  :
  : korn: http://www.kornshell.com/
  :
  : tcsh: http://www.tcsh.org/Welcome
  :
  : you find a list of available shells by typing "cat /etc/shells" at the command line.
  :
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  : nugent
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• nugent

  October 2006

  an easy way to do this to continually read a line from stdin (use gets, or fgets) and parse the input.
  
  if input is equal to "exit" your program quits.
  
  for cd and pwd see: http://www.gnu.org/software/libc/manual/html_node/Working-Directory.html#Working-Directory
  
  for help just print the list of commands and what they do
  
  dir: http://www.gnu.org/software/libc/manual/html_node/Accessing-Directories.html#Accessing-Directories
  
  clear: there are many ways to do this. try to figure it out for yourself first, but if you have problems you know where to ask.
  
  history: this just a list of commands that have been previously executed, so you will either have to store this in memory or in an external file (bash uses ~/.bash_history) and print it to stdout when required.
  
  to run an external command you can use system() or one of the functions from the exec() family (execl, execlp, execle, execv, execvp).
  
  
  
  ------
  nugent
  
  
  
  
• rakeshkumardas

  November 2006

  hello sir,
  i am still getting problem doing this.if you will send some sample codes for these commands ,it will be very helpful for me.
  
  
  : an easy way to do this to continually read a line from stdin (use gets, or fgets) and parse the input.
  :
  : if input is equal to "exit" your program quits.
  :
  : for cd and pwd see: http://www.gnu.org/software/libc/manual/html_node/Working-Directory.html#Working-Directory
  :
  : for help just print the list of commands and what they do
  :
  : dir: http://www.gnu.org/software/libc/manual/html_node/Accessing-Directories.html#Accessing-Directories
  :
  : clear: there are many ways to do this. try to figure it out for yourself first, but if you have problems you know where to ask.
  :
  : history: this just a list of commands that have been previously executed, so you will either have to store this in memory or in an external file (bash uses ~/.bash_history) and print it to stdout when required.
  :
  : to run an external command you can use system() or one of the functions from the exec() family (execl, execlp, execle, execv, execvp).
  :
  :
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  : nugent
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• nugent

  November 2006

  
  this is a relatively simple thing to do, i have a complete version of what you want, its only about 200 lines of code and took about 15 minutes to write.
  
  I'm guessing that this is some sort of project (for school or college) which is why i am not going to just give you the code, but if you tell where you are having problems, or what exactly you can and cannot do i should be able to help you
  
  
  
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  nugent
  
  
  
  
• rakeshkumardas

  November 2006

  actually i have to submit the project in college as mini-project.but due to same health related problem i am unable to do anything.now on monday i have to submit the project.so it is very helpful for me if you send me the codes. please make me obliged.
  thanks in advance.
  Rakesh
  : this is a relatively simple thing to do, i have a complete version of what you want, its only about 200 lines of code and took about 15 minutes to write.
  :
  : I'm guessing that this is some sort of project (for school or college) which is why i am not going to just give you the code, but if you tell where you are having problems, or what exactly you can and cannot do i should be able to help you
  :
  :
  :
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  : nugent
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