An interactive user defined bash-like shell which supports semi-colon separated list of commands and any number of spaces between words.It can take commands in input check if a builtin exists if exists then run the builtin else run it as separate process(execvp). The shell also supports input and output redirection along with piping of commands.
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make
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./a.out
| command | description | flags_supported | arguements |
|---|---|---|---|
| ls | shows file and directories | -a,-l | 0 or 1 |
| cd | changes current directory | - | 0 or 1 |
| pwd | shows current directory | - | 0 |
| echo | print on terminal | - | 0 or more |
| pinfo | information of the given pid or shell | - | 0 or 1 |
| history | shows commands history | - | 1 |
| nightswatch | shows the number of times each cpu is interrupted or size of memory which is dirty | - | 3 |
| quit | exit from shell | - | - |
| c | clear the screen | - | - |
| setenv | used to set or change environment variable | - | 1 0r 2 |
| nsetenv | used to unset environment variable | - | 1 |
| getenv | get the value of environment | - | 1 |
| cronjob | executes a particular command in fixed time interval for a certain period | - | 6 |
| jobs | Shows all background process with status and index | - | - |
| kjob | Used to send kill signal to process listed in jobs | - | 2 |
| overkill | kills all background process at once | - | - |
| bg | changes a stopped background job to a running background job | - | 1 |
| fg | brings a running or a stopped background job with given job number to foreground | - | 1 |
- Supports semi-colon separated commands
- Supports any number of space separated words
- Modular code structure
- Supports background process creation when command followed by '&'.
- Prints exit message when background exits
- Supports input and output file redirection
- Supports piping of commands
- Supports Ctrl + C signal.
- Unique builtins like pinfo, jobs, kjob, overkill ,quit,c(clear)
- The directory from which the shell is invoked will be the home directory of the shell and should be indicated by "~"
- If you press up key n times then the nth command in the history will run.
- All the commands executed are stored in a file named history.