unix lab record questions

MCA 2nd Year 2nd Semester – 2011 UINX-PROGRAMMING_LAB-

Page | 1

UNIX

Shell ProgrammingLab Record


Aim : Write a Shell script to display Prime numbers in a given

range.

UNIX Source Code :

echo Enter the range for prime number.read mn=2echo The prime numbers till $m are as follows:echo $nwhile [ $n -le $m ]do

n=èxpr $n + 1`t=ècho $n /2 |bcì=2flag=0while [ $i -le $t ]do

temp=èxpr $n % $i` if [ $temp -eq 0 ] then flag=1 break fi

i=èxpr $i + 1`doneif [ $flag -eq 0 -a $n -le $m ]then

echo $n fi

done

OUTPUT:

Page | 2

1. Display Prime Numbers


Aim : Write a Shell script to find the factorial of a given number.

UNIX Source Code :

echo “Enter any number to find factorial.”read nfact=1i=1while [ $i -le $n ]do fact=`expr $fact \* $i` i=`expr $i + 1`doneecho “Factorial of $n is $fact”

OUTPUT:

Page | 3

2. Factorial of a given Number


Aim : Write a Shell script to display Fibonacci series.

UNIX Source Code :

echo Enter the range to find Fibonacci series.read na=0b=1echo $aecho $bwhile [ $n -gt 2 ]do c=`expr $a + $b` echo $c a=$b b=$c n=`expr $n - 1`done

OUTPUT:

Page | 4

3. Fibonacci series


Aim :Write a Shell script to find whether the given number is

palindrome or not.

UNIX Source Code :

echo Enter any number.read numa=$numrev=0while [ $num -ne 0 ]do rem=èxpr $num % 10` rev=èxpr $rev \* 10 + $rem` num=èxpr $num / 10`doneif [ $a -eq $rev ]then echo The given number is a Palindrome.else echo The given number is not a Palindrome.fi

OUTPUT:

Page | 5

4. Palindrome


Aim : Write a Shell Script for Multiplication table.

UNIX Source Code :

echo “Enter the number”read necho “Enter the limit”read lecho “MULTIPLICATION TABLE”echo “---------------------------------”i=1while [ $i –le $l ]doa=` expr $n \* $i `echo “$n * $i = $a”i= ` expr $i + 1 `done

OUTPUT:

Page | 6

5. Multiplication


Aim: Write a Shell Script to find Greatest among three

Numbers.

UNIX Source Code :

echo “Enter the first number”read aecho “Enter the second number”read becho “Enter the third number”read cif [ $a -gt $b -a $a -gt $c ]

thenecho “$a is greater”else if [ $b -gt $c ]

then echo “$b is greater”

elseecho “$c is greater”

fi fi

OUTPUT:

Page | 7

6. Greatest among three Numbers


Page | 8

UNIX

Perl ProgrammingLab Record


Aim: Write a program to demonstrate Arithmetic Operators in Perl.

print "enter first number:\n";

$n1=<stdin>;

print "enter second number:\n";

$n2=<stdin>;

print "enter ur choice:1:add,2:sub,3:mul,4:div,5:modulo\n";

$n3=<stdin>;

if($n3==1)

{

$n4=$n1+$n2;

print "sum of two numbers is:$n4\n";

}

elsif($n3==2)

{

$n4=$n1-$n2;

print "difference of two numbers is:$n4\n";

}

elsif($n3==3)

{

$n4=$n1*$n2;

print "multiplication of two numbers is:$n4\n";

}

elsif($n3==4)

{

$n4=$n1/$n2;

Page | 9

7. Arithmetic Operators in Perl


print "division of the given numbers is:$4\n";

}

elsif($n3==5)

{

$n4=$n1%$n2;

print "modulo of two numbers is:$n4\n";

}

else

{

print "enter correct choice:\n";

}

OUTPUT:

Page | 10


Aim: write a program to demonstrate string handling functions in perl

print "\n 1.join\n\t 2.Uppercase\n\t\t 3.Lowercase\n\t\t\t

4.Hexa-value\n\t\t\t\t 5.length\n\n Enter your Choice:";

$ch=<stdin>;

if($ch==1)

{

print "Enter First String:";

$str1=<stdin>;

print "Enter Second String for Join::";

$str2=<stdin>;

$result=join('.',$str1,$str2);

print "the joined String is:$result";

}

elsif($ch==2)

{

print "Enter any String:";

$str=<stdin>;

$uppercase=uc($str);

print "uppercase of given string is:$uppercase";

}

elsif($ch==3)

{


$str=<stdin>;

$lowercase=lc($str);

Page | 11

8. String Handling Functions in Perl


print "lower case of given string is:$lowercase";

}

elsif($ch==4)

{


$str=<stdin>;

$hex_val=hex($str);

print "Hexa decimal value of given string is:$hex_val";

}

elsif($ch==5)

{


$str=<stdin>;

$length1=length($str);

print "length of given string is:$length1\n";

}

else

{

print "Choose correct Choice";

}

OUTPUT:

Page | 12


Aim: write a program to demonstrate Fibonacci series in perl.

print"enter the num:";

$n=<stdin>;

$a=o;

$b=1;

print"$a\t$b\t";

for($i=1;$i<=$n;$i++)

{

$c=$a+$b;

$a=$b;

$b=$c;

print"$c\t";

}

OUTPUT:

Page | 13

9. Fibonacci Series in Perl


Aim: write a program to demonstrate Reading and Writing a data into a File.

open(READ,"<abc.dat");

$str=<READ>;

print "The file contains:$str";

close(READ);

open(WRITE,">>abc.dat");

print "Enter any string to write in to the file:";

$var=<stdin>;

print WRITE $var;

close(WRITE);

open(IN,"<abc.dat");

$var=<IN>;

print $var;

close(IN);

OUTPUT:

Page | 14

10. File Handling in Perl


Aim: write a program that takes the date from the user in the format DD-MM-YY and checks it is valid or not.

print "Enter the date in the format of [DD-MM-YY]:";

$date=<stdin>;

if($date=~m/((0[1-9]|1[0-9]|2[0-9]|3[0-1])-(0[1-9]|1[0-2])-([0-9]

[0-9]))/)

{

print "The given date is Valid:$date";

}

else

{

print "The given date is invalid:$date";

}

OUTPUT:

Page | 15

11. Pattern Matching in Perl


Aim: write a program to demonstrate Substitution in Perl using pattern matching

print "enter a string\n"; $name=<stdin>;print "enter a string for substitution\n"; $n1=<stdin>;print "enter string to substitution\n"; $n2=<stdin>;if($n1=~m/$n2/i)

{print "Replace not Needed(both strings are same)!";print "$name";}

else{$name=~s/$n1/$n2/g;print $name;}

OUTPUT:

Page | 16

12. Substitution in Perl


Page | 17

UNIX

PHP ProgrammingLab Record


Aim: Write a program to illustrate predefined number functions in php.

<?php

print "number \t\t sqrt \t\t sqare \t\t cube \t\t quade\n";

print "------ \t\t ---- \t\t ----- \t\t ---- \t\t -----\n";

for($i=1;$i<=10;$i++)

{

$root=round(sqrt($i),2);

$sqr=pow($i,2);

$cube=pow($i,3);

$quad=pow($i,4);

print "$i \t$root \t\t $sqr \t\t $cube \t\t $quad\n";

}

?>

OUTPUT:

Page | 18

1. Number Functions in php


Aim: Write a program to demonstrate String functions in php.

<?php

$var1="Pinky ";

$var2="Lucky";

$l=strlen($var1);

$c=strcmp($var1,$var2);

print "length of '$var1' is: $l\n";

print "comparision of '$var1' and $var2 is: $c\n";

print "sub string of '$var1' from 0 index and 4 charecters below:\n";

print substr($var1,0,4);

print "\n";

print " '$var1' is converted into lower case below:\n";

print strtolower($var1);

print "\n";

print " '$var2' is converted into upper case below:\n";

print strtoupper($var2);

print "\n";

print " '$var1': after applying trim below:\n";

print trim($var1);

print "\n";

?>

Page | 19

2. String Functions in php


OUTPUT:

Page | 20


Aim: Write a program to illustrate Array functions in php.

<?php

$days=array("sun"=>1,"mon"=>2,"tue"=>3,"wed"=>4);

$day=array(1,2,3,4);

print "befor unset of 3 in day array are:\n";

foreach($day as $b)

print "$b\n";

print "after unset of 3 we get below:\n";

unset($day[2]);

foreach($day as $a)

print "$a\n";

if(array_key_exists("sun",$days))

{

print "sun is exists in days array\n";

}

if(in_array("3",$day))

{

print "3 exists in day\n";

}

if(is_array($day))

{

Page | 21

3. Array functions in php


print "day is array\n";

}

$s=sizeof($day);

print "size of $day is: $s\n";

foreach($days as $d=>$n)

print "key is: $d and value is: $n\n";

?>

OUTPUT:

Page | 22


Aim: Write program to illustrate Sort functions in php.

asort ( ):

<?php

$a=array(“mon”=>1,”tue”=>5,”wed”=>2);

asort($a);

foreach($a as $b=>$c)

print “$b = > $c\n”;

?>

OUTPUT:

ksort ( ):

<?php

$a=array(“Pinky”=>2,”Lucky”=>1,”Pinku”=>3);

Page | 23

4. Sort Functions in php


ksort($a);



?>

OUTPUT:

rsort ( ):

<?php

$a=array(2,1,4,3,6);

rsort($a);

foreach($a as $b)

print “$b\n”;

?>

OUTPUT:

Page | 24


arsort ( ):

<?php

$a=array(“mon”=>1,”tue”=>5,”wed”=>2);

arsort($a);



?>

OUTPUT:

krsort ( ):

<?php

$a=array(“zat”=>2,”bat”=>1,”apt”=>3);

ksort($a);

Page | 25




?>

OUTPUT:

Page | 26


Aim: Write a program to demonstrate form handling in PHP.

Details.html:

<html>

<head>

<TITLE> :Student Details: </TITLE>

</HEAD>

<BODY>

<h2>STUDENT DETAILS FORM</h2>

<form name=f1 action="details.php" method="POST">

Student Name:<input type="text" name="sname"><br>

Section:<input type="text" name="sec"><br>

gender:<input type="radio" name="gender" value="male">Male

<input type="radio" name="gender" value="female">FeMale<br>

Course:<select name="qual">

<option>MCA</option>

<option>MBA</option>

<option>BCA</option>

</select><br>

Address:<textarea rows="5" cols="20"

Page | 27

5. Form Handling in php


name="add"></textarea></br>

<input type=submit value=SUBMIT>

<input type=reset value=CANCEL>

</form>

</BODY>

</HTML>

Details.php:

<html>

<head>

<title>Processing Student deatils</title>

</head>

<body>

<?php

$name=$_POST["sname"];

$section=$_POST["sec"];

$gender=$_POST["gender"];

$course=$_POST["qual"];

$address=$_POST["add"];

?>

<table border=1>

<caption>STUDENT DETAILS</caption>

<tr>

<td>Name</td>

<td><?php print("name"); ?></td>

</tr>

Page | 28


<tr>

<td>Section</td>

<td><?php print("section"); ?></td>

</tr>

<tr>

<td>Gender</td>

<td><?php print("gender"); ?></td>

</tr>

<tr>

<td>Course</td>

<td><?php print("course"); ?></td>

</tr>

<tr>

<td>Address</td>

<td><?php print("address"); ?></td>

</tr>

</table>

</body>

</html>

OUTPUT of Details.html:

Page | 29


OUTPUT of Details.php:

Page | 30


Page | 31

UNIX

IPC ProgrammingLab Record


Aim : Write a program to create two processes, the parent

process sends a word to child process. The child process reads the word and display.

A) Parent writes and Child reads:

#include<stdio.h>

#include <unistd.h>

#include<sys/types.h>

#include<errno.h>

int main()

{

pid_t pid;

char line[20];

int n,fd[2];

if(pipe(fd)<0)

{

perror("Error in Creation of Pipe");

exit(1);

}

if((pid = fork()) < 0)

perror("unable to create the child process");

Page | 32

1. Demonstration of Pipe as IPC


else if(pid > 0 )

{ write(fd[1],"hello world",15); }

else

{

n = read(fd[0],line,20);

printf("bytes %d %s",n,line);

}

}

B) child writes and parent reads:

#include <stdio.h>

#include<sys/pipes.h>

#include<error.h>

#include<sys/ipc.h>

main()

{

int fd[2],n;

char buff[15];

pid_t pid;

if(pipe(fd)<0)

{

perror("unable to create pipe\n");

exit(1);

}

if((pid=fork())<0)

{

perror("unable to create child");

exit(0);

}

if(pid==0)

Page | 33


write(fd[1],"Hello PIPE",15);

else

{

n=read(fd[0],buff,15);

printf("data read is %s ",buff);

printf("no of bytes read is %d",n);

}

}

A) Expected OUTPUT of Parent writes and Child reads Program:

B) Expected OUTPUT of Child writes and Parent reads Program:

Page | 34


Aim : Write a program to demonstrate named pipes.

#include <stdio.h>


#include<sys/pipes.h>

#include<error.h>

#include<sys/ipc.h>

main()

{

char buff[15];

int fd,n;

pid_t pid;

if((mknod("first",010666,0))<0)

perror(“Named pipe creation is fail”);

if(fd=open("first",O_RDWR))<0);

perror(“Failed to open the pipe”);

if((pid=fork())<0)

{

Page | 35

2. Named Pipes


perror("unable to create child");

exit(1);

}

if(pid>0)

{

write(fd,"hello world",15);

}

else

{

n=read(fd[0],buff,15);

printf("data read is %s ",buff);

printf("no of bytes read is %d",n);

}

}

Expected OUTPUT:

Page | 36


Aim : Write program to demonstrate message queue.

#include<stdio.h>

#include<string.h>


#include<sys/ipc.h>

#include<errno.h>

#include<unistd.h>

struct data

{

long mtype;

char myext[100];

}msg,msg1;

main()

{

int key=555;

int qid,pid;

Page | 37

3. Message queue


qid=msgget((key_t)key,IPC_CREAT|0666);

if((pid=fork())<0)

{ perror(“Error in creation of child process”);exit(1); }

if(pid>0)

{

msg.mtype=1;

strcpy(msg.mtext,”pinky”);

if(msgsnd(qid,&msg,sizeof(msg.mtext),0)<0)

{

perror(“parent process unable to send the message”);

exit(1);

}

}

else

{

if(msgrcv(qid,&msg1,sizeof(msg1.mtext),1,0)<0)

{

perror(“child process unable to receive the message”);

exit(1);

}

else

{

Printf(“mtype=%d mtext=%s”,msg1.mtype,msg1.mtext);

Page | 38


}

}

}

Expected OUTPUT:

Page | 39


Aim : Write program to demonstrate Semaphores.

#include<stdio.h>

#include<string.h>


#include<sys/ipc.h>

#include<errno.h>

#include<unistd.h>

#define numloops 20

union semun

{

int val;

struct semid_ds *buf;

Page | 40

4. Semaphor


unsigned short *array;

struct seminfo* _buf;

};

int main()

{

int sem_set_id;

union semon sem_val;

int child_pid;

int i;

struct sembuf sem_op;

int rc;

struct timespec delay;

sem_set_id=semget(IPC_PRIVATE,1,0600);

if(sem_set_id==-1)

{

perror(“Error in creation”);

exit(1);

}

printf(“semaphore is created %d”,sem_set_id);

sem_val.val=0;

rc=semctl(sem_set_id,0,SETVAL,sem_val);

child_pid=fork();

switch(child_pid)

{

case -1:

perror(“Error in creation of process”);

exit(1);

Page | 41


case 0:

for(i=0;i<numloops;i++)

{

sem_op.sem_num=0;

sem_op.sem_op=-1;

sem_op.sem_flg=0;

semop(sem_set_id,&sem_op,1);

printf(“consumer:%d\n”,i);

fflush(stdout);

}

break;

default:

for(i=o;i<numloops;i++)

{

printf(“producer: %d\n”,i);

fflush(stdout);

sem_op.sem_num=0;

sem_op.sem_op=1;

sem_op.sem_flg=0;

semop(sem_set_id,&sem_op,1);

sleep(1);

}

}

return 0;

}

Page | 42


Expected OUTPUT:

Aim : Write a program to demonstrate the concept of shared memory using parent and child process.

#include<stdio.h>

#include<string.h>


#include<sys/ipc.h>

#include<errno.h>

#define SIZE 1024

main()

{

int shmid,pid,nread;

char *msg;

Page | 43

5. Shared Memory


key_t key=9955;

shmid=shmget(kwy,1024,IPC_CREAT|0666);

if(shmid<0)

{

perror(“shared memory not created”);

exit(1);

}

msg=shmat(shmid,0,0);

if((pid=fork())<0)

{

perror(“error in creating process”);

exit(0);

}

strcpy(msg,”pinky”);

if(pid==0)

{

nread=read(0,msg,SIZE);

}

else

write(1,msg,SIZE);

}

Expected OUTPUT:

Page | 44


Page | 45

UNIX

Socket ProgrammingLab Record


Aim: Write a socket program for connection oriented iterative client.

#include<sys/socket.h>


#include<netinet/in.h> #include<errno.h>

main( int argc, char *argv[])

{

int sockfd,s,n;

struct sockaddr_in servaddr;

char buff1[max],buff2[max];

if(sockfd=socket(AF_INET,SOCK_STREAM,0)<0)

perror(" socket creation failed ");

Page | 46

1. Connection Oriented Client


servaddr.sin_family=AF_INET;

servaddr.sin_port=htons( atoi(argv[1]));

servaddr.sin_addr.s_addr=inet_addr("192.068.001.215");

if(s=connect(sockfd,(struct sockaddr*)&servaddr,sizeof(servaddr))<0)

perror("Request failed");

for(;;)

{

write(1,"Enter message:",15);

n=read(0,buff,max);

send(sockfd,buff1,max,0);

write(1,"client received",20);

write(1,buff2,n);

}

close(sockfd);

exit(1);

}

Expected OUTPUT:

Page | 47


Aim: Write a socket program for connection oriented echo server.



#include<netinet/in.h>

#include<errno.h>


{

int sockfd,newsockfd,i,n,cli_len,max=80;

Page | 48

2. Connection Oriented Echo Server


struct sockaddr_in serv_addr, cli_addr;

char buff[max];

if(sockfd=socket(AF_INET,SOCK_STREAM,0)<0)

perror(" socket creation failed ");

bzero((char)*&serv_addr,sizeof(serv_addr));


servaddr.sin_port=htons( atoi(argv[1]));

servaddr.sin_addr.s_addr=htonl(INADDR_ANY);

if(bind(sockfd,(struct sockaddr*)&serv_addr, sizeof(serv_addr)) <0)

perror(" binding failed ");

listen(sockfd,5);

printf( " server in waiting...... \n\n");

for(;;)

{

cli_len=sizeof(clia_ddr);

if(newsockfd =accept(sockfd,(struct sockaddr *)&cli_addr,&cli_len)<0)

write(1,"server accept ! error \n",24);

if((pid=fork())==0)

{

close(sockfd);

for(i=0;i<=10;++i)

{

write(1," server recieved: ",18);

n=recv(newsockfd,buff,max,0);

write(1,"buff,n);

write(1,"Enter message:",15);

read(0,buff,max);

Page | 49


send(newsockfd,buff,max,0);

}

close(newsockfd);

exit(0);

}

}

}

Expected OUTPUT:

Aim: Write a socket program for connection less echo server.




#include<errno.h>

short portno;

Page | 50

3. Connectionless Echo Server



{

int sockfd,numbytes,addr_len;


char buff[max];

if(argc!=2)

{

printf("usage:server<protno>");

exit(1);

}

if(sockfd=socket(AF_INET,SOCK_DGRAM,0)==-1)

{

printf("server socket ");

exit(1);

}


portno=atoi(argv[1]);

servaddr.sin_port=htons(portno);

servaddr.sin_addr.s_addr=htonl(INADDR_ANY);

if(bind(sockfd,(struct sockaddr*)&serv_addr, sizeof(struct sockaddr)) <0)

{

perror(" binding failed ");

exit(1);

}

addr_len=sizeof(cli_addr);

if((numbytes=recvfrom(sockfd,buff,sizeof(buff),0,

(struct sockaddr*)&cli_addr,&(addr_len)))<0)

{

Page | 51


perror("recvfrom");

exit(1);

}

printf( "Listener: \n\n");

printf("got packet from %s \n",inet_ntoa(cli_addr.sin_addr));

printf("\n packet is %d bytes long \n",numbytes);

printf("packet contains:%s\n",buff);

exit(0);

}

Expected OUTPUT:

Aim: Write a socket program for connection less echo client.

#include<stdio.h>


#include<arpha/intet.h>


Page | 52

4. Connectionless Echo Client



#include<errno.h>

#define MAX 80

short portno;


{

int sockfd,s,i,n;

struct sockaddr_in serv_addr;

char buff1[max],buff2[max];

sockfd=socket(AF_INET,SOCK_STREAM,0);

bzero((char *)&serv_addr,sizeof(serv_addr));

serv_addr.sin.family=AF_INET;

serv_addr.sin_addr.s_addrinet_aaddr("127.0.0.1");

serv_addr.sin_port=htons(atoi(argv[1]));

s=connect(sockfd,(struct sockaddr*)&serv_addr,sizeof(serv_addr));

if(s<0)

{

printf(" error\n ");

}

for(;;)

{

writer(1," enter a message: ",15);

n=read(0,buff,MAX,0);

write(1," client recieved ",18);

write(1,buff2,n);

}

close(sockfd);

exit(0);

Page | 53


}

Expected OUTPUT:

Aim: Write a socket program connection less datagram client.

#include<stdio.h>



Page | 54

5. Connection less Client


#include<netdb.h>

short portno;

int main( int argc, char *argv[])

{

int sockfd,numbytes,addr_len;

struct sockaddr_in serv_addr,cliaddr;

char buff[100];

if(argc!=4)

{

printf(' usage: client<portno><hostname> <message> \n");

exit(1);

}

if((sockfd=socket(AF_INET,SOCK_DGRAM))==-1)

{

printf(" server socket ");

}

cliaddr.sin_family=AF_INET;

cliaddr.sin_port=htons(0);

cliaddr.sin_addr.s_addr=htonl(atoi(01);

if(bind(sockfd,(struct sockaddr *)&cliaddr,sizeof(struct sockaddr))==-1)

{

perror(" bind error ");

exit(1);

}



servaddr.sin_port=htons(portno);

servaddr.sin_addr.s_addr=inet+addr(argv[2]);

Page | 55


numbytes=sendto(sockfd.argv[3],strlen(argv[3]),0,

(struct sockaddr *)&servaddr,sizeof(servaddr));

if(numbytes <0)

printf("\n client: send to error \n ");

exit(1);

printf(" talker:\n ");

printf(" send %d number of bytes to %s \n",

numbytes,net_ntoa(servaddr.sin_addr));

exit(0);

}

Expected OUTPUT:

Aim: Write a socket program program to stream time client.

#include<stdio.h>


Page | 56

6. Stream Time Client


#include<string.h>



#include<time.h>

short portno;

char *host;


{

int sockfd,s,i,addlen,j,newfd;

struct sockaddr_in serv_addr;

char buff[512],*st;



host=argv[2];

serv_addr.sin_port=htons(portno);

serv_addr.sin.family=AF_INET;

serv_addr.sin_addr.s_addr=htonl("0L");

addlen=sizeof(serv_addr);

connect(sockfd,(struct sockaddr*)&serv_addr,addlen);

j=read(sockfd,buff,sizeof(buff));

write(1,buff,j);

}

Expected OUTPUT:

Page | 57


Aim: Write a socket program for stream time server.

#include<stdio.h>

Page | 58

7. Stream Time Server



#include<string.h>



#include<time.h>


{

int sockfd,i,cli_len,newfd;

struct sockaddr_in serv_addr,cli_addr;

char buff[512],*st;

long t;


serv_addr.sin_port=htons(atoi(argv[1]));

serv_addr.sin_family=AF_INET;

serv_addr.sin_addr.s_addr=htonl(01);

bind(sockfd,(struct sockaddr *)& serv_addr.sizeof(serv_addr));

listen(sockfd,5);

printf(" server is waiting for client request... \n\n");

cli_len=sizeof(cli_addr);

newfd=accept(sockfd,(struct sockaddr *)& cli_addr,&cli_len);

for(;;)

{

cli_len=fork();

if( cli_len==0)

{

close(sockfd);

t=time(&t);

st=(char *)ctime(&t);

Page | 59


strcpy(buff,st);

write(newfd,buff,strlen(buff));

}

}

close(newfd);

}

Expected OUTPUT:

Aim: program for datagram time client.

Page | 60

8. Datagram Time Client


#include<stdio.h>




#include<errno.h>

#include<string.h>

#include<time.h>


{

int sockfd,i,addlen,j;


char buff[512],*st;

long t;

if(sockfd=socket(AF_INET,SOCK_DGRAM.0)<0)

{

perror(" socket not created ");

exit(1);

}

cli_addr.sin_port=htons(0);

cli_addr.sin_family=AF_INET;

cli_addr.sin_addr.s_addr=htonl(01);

if(bind(sockfd,(struct sockaddr *)&cli_addr,sizeof(cli_addr))<0);

{

perror(" bind error ");

exit(1);

}

serv_addr.sin_family=AF_INET;

serv_addr.sin_port=htns(atoi(argv[1]));

Page | 61


serv_addr.sin_addr.s_addr=htnl(inet_addr(argv[2]));

addrlen=sizeof(serv_addr);

if(recvfrom(sockfd,buff,512,0,(struct sockaddr *)&serv_addr,&addrlen))<0)

{

perror(" error message ");

exit(1);

}

nbytes=strlen(buff);

if(write(1,buff,nbytes)!=nbytes)

{

perror (" write error ");

exit(1);

}

}

Expected OUTPUT:

Page | 62


UNIX

Python ProgrammingLab Record

Page | 63

1. Math Functions in Python


Aim: Write a python program for math functions in python.

x=-12

y=12.6

a=abs(x)

c=round(y)

d=complex(x,y)

e=pow(2,5)

print "absolute of x:",a

print "(division ,modulo):",divmod(x,y)

print "round value of (y):",c

print "complex value of (x and y)",d

print "power is",e

OUTPUT:

Page | 64

2. Arithmetic operators in python


Aim: Write a python program for Arithmetic Operators in python.

a=5

b=10

c=a+b

d=a-b

e=a*b

f=a/b

g=a%b

h=a**b

print "sum is",c

print "diff is",d

print "mul is",e

print "div is",f

print "mod is",g

print "pow is",h

OUTPUT:

Page | 65 3. Nested-if-Else Condition in Python


Aim: Write program to illustrate the Nested-if-else Condition in Python.

s3=11

s6=13

n3=25

if s3 > s6 :

if s3 > n3 :

print ' ”s3” is greater ',s3

elif(s6>n3):

print ' “s6” is greater ',s6

else:

print ' “n3” is greater ',n3

OUTPUT:

Page | 66 4. String Functions in Python


Aim: Write a program to demonstrate string functions in Python.

str=raw_input()

print ' str to capitalize: ',str.capitalize()

print ' count of “o” appear in str: ',str.count('o',0,29)

print ' index of “mm” in str is: ',str.find('mm',0,29)

print ' “wel” is starting from first in str is:

',str.startswith('wel',0,29)

print ' “ing” is ending of str: ',str.endswith('ing',0,29)

print ' str`` is alphabets: ',str.isalpha()

print ' str is lower: ',str.islower()

print ' str is upper: ',str.isupper()

print ' str is Space: ',str.isspace()

print ' str is title: ',str.istitle()

print ' str length is: ',len(str)

print ' str in lower case: ',str.lower()

print ' str in upper: ',str.upper()

str1=str.replace('welcome','learned')

print ' After replace String:”welcome” with “learned” is:

',str1

print ' Original string is: ',str

Page | 67


OUTPUT:

Page | 68


Aim: Write a program to illustrate Lists in Python.

list1=['h','e','l','l','o']

print ' first letter in list1 is: ',list1[0]

print ' last but one letter in list1 is: ',list1[-2]

print ' 0-2 index letters in list1 is: ',list1[0:3]

list2=['w','o','r','l','d']

list3=list1+list2

print ' combined list of list1 and list2 ',list3

print ' “l” in list3 count is: ',list3.count('l')

OUTPUT:

Page | 69

5. Lists in Python


Aim: Write a program to illustrate Classes in Python.

B) Creation of Class:

[lucky@localhost ~]$ python

Python 2.7 (r27:82500, Sep 16 2010, 18:03:06)

[GCC 4.5.1 20100907 (Red Hat 4.5.1-3)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> class FooClass(object):

... """my very first class: FooClass"""

... version=0.1

... def _init_(self, nm=' Pinky Lucky '):

... """Constructor"""

... self.name=nm

... print ' Created a class instance for ',nm

... def showname(self):

... """display instance attribute and class name"""

... print ' your name is: ',self.name

... def showver(self):

... """display class(static) attribute"""

... print self.version

... def addMe2Me(self,x):

... """apply + operation to argument"""

Page | 70

6. Classes in Python


... return x + x

...

>>>

B) Creation of Instance for Class:

>>> Fool = FooClass()

>>> Fool._init_()

Created a class instance for Pinky Lucky

>>> Fool.showname()

your name is: Pinky Lucky

>>> Fool.showver()

0.1

>>> print Fool.addMe2Me(5)

10

>>> print Fool.addMe2Me('virus')

virusvirus

>>>

OUTPUT:

Page | 71


Page | 72

unix lab record questions

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