MiniShell

A simplified Linux interactive shell with support for:

• external commands
• built-in commands
  • cd
  • exit
  • fg
  • bg
  • jobs
  • unset
  • export
• I/O redirection
• pipelines
• signal handling
• variable assignment & environment export
• foreground & background command execution with basic job control

Build

make clean release
./release/minishell

Examples

Multiple redirections:

MS: >testfile 5>&1 6>&2  sh -c 'echo HELLO >&5; echo WORLD >&6'
WORLD
MS: cat testfile
HELLO

Pipelines with redirects:

MS: 5>&1  sh -c 'echo hello world! >&5' | sed 's/hello/goodbye/' | cat -v
goodbye world!

Stop signal places synchronous commands in the background:

MS: sh -c 'sleep 5; killall -SIGSTOP sleep;' & sleep 100
[0] 1234
...5 secs later...
[1] Stopped