WriteaCprogramminishell(ms$)thatgoesintoaninfiniteloopwaitingforuser'scommands.Onceacommandisentered,theprogramshouldass...

Write

a

C

program

min

is

hell

(

ms

$

)

that

goes

into

an

infinite

loop

waiting

for

user

's

commands

.

Once

a

command

is

entered

,

the

program

should

assemble

and

execute

each

command

using

fork

(),

exec

()

and

other

system

calls

as

required

with

the

following

rules

and

conditions

.

Rule

1

:

The

arg

c

of

any

individual

command

or

program

should

be

>=

1

and

=

6



ms

$

ls

-

1

~/

chapter

2

-

S

-

n

//

valid



ms

$

cat

new

.

txt

//

valid

Rule

2

:

The

arg

c

of

indu

v

ial

commands

or

programs

that

are

used

along

with

the

special

characters

listed

below

should

be

>=

1

and

<>

6

Ex

:

ms

$

ls

-

1

~/

chapter

2

-

S

-

n

|

w

c

-

w

//

the

first

command

has

arg

c

=

5

and

the

second

command

has

arg

c

=

2

which

are

used

along

with

the

special

|

character

Special

Characters

The

program

should

handle

the

following

special

characters

(

In

accordance

to

Rule

2

and

the

additional

rules

listed

below

)



|

Pip

ing

(

up

to

5

piping

operations

should

be

supported

)

Ex

ms

$

cat

ex

1

.

c

|

g

rep

std

|

w

c

|

w

c

-

w

//

Every

command

/

program

can

have

arg

c

>=

1

and

<>

6

as

per

Rule

2



>

,

,

>>

Red

irection

Ex

:

ms

$

ls

-

1

>>

d

isl

ist

.

txt



&&

Cond

itional

Execution

//

upt

o

5

conditional

execution

operators

should

be

supported

and

could

possibly

be

a

combination

of

&&

and

||

Ex

:

ms

$

ex

1

&&

ex

2

&&

ex

3

&&

ex

4

&&

ex

5



ms

$

c

1

&&

c

2

||

c

3

&&

c

4



||

Cond

itional

Execution

//

see

&&



&

Background

Processing



ms

$

ex

1

&

//

should

run

ex

1

in

the

background



;

Sequ

ential

execution

of

commands

(

up

to

5

commands

)

the

arg

c

of

each

command

should

be

>=

1

and

<>

6

as

per

Rule

1

Ex

:

ms

$

cat

e

1

.

txt

;

cat

e

2

.

txt

;

ls

;

date

Note

:

You

have

to

use

fork

()

and

exec

()

along

with

other

pertinent

system

calls

to

run

commands

from

min

is

hell

.

Mar 16, 2023

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