Multiple process using fork()


 
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# 1  
Old 11-18-2008
Lightbulb Multiple process using fork()

I have a code which has four different process, each printing different message. I have provided it with user input (implemented using thread), depending on which the corresponding message from that process has to be printed.The code is shown below.when I run the pgm, it takes input such as 1,2,3........ through command prompt, and I get "bash command not found" Kindly help me to get output



#include<stdio.h>

#define _REENTRANT

#include<pthread.h>

#include<stdlib.h>

int i;

void DieWithError(char *errorMessage);

int key;

int z = 0;

void *key_hit1 (void *arg)

{

while(1)

{

key = (int)getchar();

switch(key)

{

case 49

printf("channel 1");

z = 1;

break;

case 50:

printf("channel 2");

z = 2;

break;

case 51:

printf("channel 3");

z = 3;

break;

}

}

}

int main()

{

pthread_t key_hit;

int process,process1,process2,process3,process4;

pthread_create(&key_hit,NULL,key_hit1,NULL);

/////////////

process = fork();

if(process == 0)

{

if( z == 1)

{

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

printf(" ans");

}

}

else if (process != 0)

process1 = fork();

if(process1 == 0)

{

if( z == 2)

{

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

printf(" qwe");

}

}

else if (process1 != 0)

process2 = fork();

if(process2 == 0)

{

if( z == 3)

{

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

printf(" dhg");

}

}

}

Last edited by shashi; 11-19-2008 at 01:24 AM.. Reason: things are getting jumbled
# 2  
Old 11-18-2008
Quote:
Originally Posted by shashi
I have a code which has four different process, each printing different message. I have provided it with user input (implemented using thread), depending on which the corresponding message from that process has to be printed.The code is shown below.when I run the pgm, it takes input such as 1,2,3........ through command prompt, and I get "bash command not found" Kindly help me to get output#include#define _REENTRANT#include#include int i; void DieWithError(char *errorMessage);int key;int z = 0;void *key_hit1 (void *arg){while(1){key = (int)getchar();switch(key){case 49Smilierintf("channel 1");z = 1;break;case 50Smilierintf("channel 2");z = 2;break;case 51Smilierintf("channel 3");z = 3;break;}}} int main() {pthread_t key_hit;int process,process1,process2,process3,process4;pthread_create(&key_hit,NULL,key_hit1,NULL);/////////////process = fork();if(process == 0){if( z == 1){for(i=0;i
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