Create a basic shell program in $C$ called wish to pass the following test cases. Be sure to use execv$()$ instead of execvp$().$ Do not hard code paths. $/$bin$/$ls should come from a search from paths. The same goes for the testing folder. There should be a main.c$,$ common.c$,$ and common.h$.$

The following are the tests to pass.

Test $1$:

$1.$desc $-$ Input to check bad od$.$ No arguments are passed to cd$.$

$1.$err $-$ An error has occurred

$1.$in $-$ cd

exit

$1.$out $-$

Test $2$:

$2.$desc $-2$ arguments are passed to cd$.$

$2.$err $-$ An error has occurred

$2.$in $-$ cd $/$bad$1/$bad$2$

exit

$2.$out $-$

Test $3$:

$3.$desc $-$ Is with a bad directory name.

$3.$err $-$Is: $/$no$/$such$/$file: No such file or directory

$3.$in $-$ Is $/$no$/$such$/$file

exit

$3.$out $-$

Test $4$:

$4.$desc $-$ Input to run misc. commands.

$4.$err $-$

$4.$in $-$ cd tests$/$p$2$a$-$test

Is

$4.$out $-$ test$1$

test$2$

test$3$

test$4$

Test $5$:

$5.$desc $-$ Tries to exit with an argument. Should throw an error.

$5.$err $-$ An error has occurred

$5.$in $-$ exit bad

exit

$5.$out $-$

Test $6$:

$6.$desc $-$ Try running a shell script without setting path.

$6.$err $-$ An error has occurred

$6.$in $-$ p$1.$sh

exit

$6.$out $-$

Test $7$:

$7.$desc $-$ Set path, run a shell script. Overwrite path and then try running the script again.

$7.$err $-$ An error has occurred

An error has occurred

$7.$in $-$ path tests

p$1.$sh

path

p$1.$sh

Is

exit

$7.$out $-$ test$1$

test$2$

test $3$

test$4$