smart girl
Group: Members
Posts: 4
Joined: Mar. 2006 |
 |
Posted: April 27 2006,23:32 |
 |
hi all
I am trying to be much familier with pipes
I tried to write a c program that generates the following output
from child:
I
want
to
print
this
line
twice
from parent:
I
want
to
print
this
line
twice
what I get is
from child:
I
want
to
print
this
line
twice
from parent:
I
I
I
I
I
I
I
my code is
| Code Sample |
#include<stdio.h>
#include<string.h>
int main(void){
int childpid,fd[2],nb,i,j;
char line[BUFSIZ]="I want to print this line twice";
char word[BUFSIZ];
pipe(fd);
childpid=fork();
if(childpid==0)
{
printf("from child:\n");
close(fd[0]);
char *token=strtok(line," ");
while(token!=NULL)
{
printf(" %s\n",token);
write(fd[1],token,(strlen(token)+1));
token=strtok(NULL," ");
}
}
else
{
wait(NULL);
printf("from parent:\n");
close(fd[1]);
for( i=0;i<7;i++){
nb=read(fd[0],word,sizeof(word));
printf("%s\n",word);
}
}
return 0;
}
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can any one tell me what's wronge with this code and how to correct it?
|
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