A C Simple Shell Project by Bisola Bolarinwa and Bamisaye Daniel.
Tasks 0. Betty would be proud mandatory Write a beautiful code that passes the Betty checks
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Simple shell 0.1 Write a UNIX command line interpreter.
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Simple shell 0.2 Simple shell 0.1 +
Handle command lines with arguments
- Simple shell 0.3 Simple shell 0.2 +
Handle the PATH fork must not be called if the command doesn’t exist
- Simple shell 0.4 Simple shell 0.3 +
Implement the exit built-in, that exits the shell Usage: exit You don’t have to handle any argument to the built-in exit
- Simple shell 1.0 Simple shell 0.4 +
Implement the env built-in, that prints the current environment
- Simple shell 0.1.1 Simple shell 0.1 +
Write your own getline function Use a buffer to read many chars at once and call the least possible the read system call You will need to use static variables You are not allowed to use getline
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Simple shell 0.2.1 Simple shell 0.2 +
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Simple shell 0.4.1 Simple shell 0.4 +
handle arguments for the built-in exit Usage: exit status, where status is an integer used to exit the shell
- setenv, unsetenv Simple shell 1.0 +
Implement the setenv and unsetenv builtin commands
setenv Initialize a new environment variable, or modify an existing one Command syntax: setenv VARIABLE VALUE Should print something on stderr on failure unsetenv Remove an environment variable Command syntax: unsetenv VARIABLE Should print something on stderr on failure
- cd Simple shell 1.0 +
Implement the builtin command cd:
Changes the current directory of the process. Command syntax: cd [DIRECTORY] If no argument is given to cd the command must be interpreted like cd $HOME You have to handle the command cd - You have to update the environment variable PWD when you change directory man chdir, man getcwd
- ; Simple shell 1.0 +
Handle the commands separator ;
- && and || Simple shell 1.0 +
Handle the && and || shell logical operators
- alias Simple shell 1.0 +
Implement the alias builtin command Usage: alias [name[='value'] ...] alias: Prints a list of all aliases, one per line, in the form name='value' alias name [name2 ...]: Prints the aliases name, name2, etc 1 per line, in the form name='value' alias name='value' [...]: Defines an alias for each name whose value is given. If name is already an alias, replaces its value with value
- Variables Simple shell 1.0 +
Handle variables replacement
Handle the
- Comments Simple shell 1.0 +
Handle comments (#)
- File as input Simple shell 1.0 +
Authors:Daniel and Bisola