Devata Shell (DeSH)

2019113007

Sriram Devata

Running DeSH

make clean
make
./desh

Assumptions

• Assuming that the shell will run on a UNIX system, to get the home directory of the process with /proc/self/exe.
• There will not be a ; at the end.
• For ls -l, printing number of 512B blocks for file system blocks.
• Since Desh uses signal over sigaction, assuming that POSIX compliance isn't needed.
• To use regex such as *.txt for grep, use will use the flag -E for extended regular expressions

File Structure

• build - temporary directory for object files

• src

  • cd.c - cd functionality
  • desh.c - main .c file
  • dpwd.c - pwd functionality
  • echo.c - echo functionality
  • general_execute.c - execute non-in-built commands
  • handler.c - handle the input command
  • history.c - history functionality
  • ls.c - ls functionality
  • pinfo.c - pinfo functionality
  • utils.c - miscellaneous helper functions
  • bg.c - bg functionality
  • fg.c - fg functionality
  • jobs.c - jobs functionality
  • pipeline.c - handles piping in commands
  • redirection.c - handles the input and output redirection for commands
  • sig.c - sig functionality

• include - corresponding .h files for the files in src