a minimalist bash-like shell
Using the availible GNU C library on linux systems, I made a minimal shell that performs some mundane commands that users execute.
You can run and try the shell by following these steps:
- create the shell executable by running
make shell - execute the executable by running
./shell
Or you can use the shell api in your code:
- include the
kfsh.hheader file in your code - add the targets
kfsh.c source/gdir.c source/genv.c source/prt.c source/mkf.c source/rmf.c source/ldir.c source/sdir.c source/cdir.c source/pfl.c source/mfl.c source/rfl.c source/finf.cto your gcc command while compiling to a binary
These are the currently supported commands:
| Command | options | option arguments | arguments | format | use |
|---|---|---|---|---|---|
| cdir | none | none | directory path | cdir dir/ |
change working directory |
| ldir | -s | none | directory path | ldir dir/ [-s] |
list directory |
| gdir | -s | none | none | gdir [-s] |
get current working directory |
| sdir | none | none | directory path and file name | sdir dir/ /file.ext |
search for file in directory |
| mkf | -u -g -o | permissions(rwx) | directory name | mkf -u perm -g perm -o perm dir/ |
create directory |
| rmf | none | none | directory path | rmf dir/ |
delete empty directory |
| finf | none | none | file path | finf /file.ext |
print file info |
| mfl | none | none | file path | mfl /file.ext |
create file |
| pfl | none | none | file path | pfl /file.ext |
print file |
| rfl | none | none | old path and new path | rfl /old.ext /new.ext |
rename or move file |
| prt | -n -r -s | print sting | none | prt -[nrs] string |
print string |
| genv | --uname --home --shell --editor --lang --path | none | none | genv [--name] [--home] [--shell] [--editor] [--lang] [--path] |
get environment variable |
Tutorials are really scarce for developing a shell from scratch, however documentation is not ! Here are some resources that streamlined my development process:
Features I will be implementing soon: