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Full Discussion: pipe help
Top Forums Programming pipe help Post 15939 by bb666 on Thursday 21st of February 2002 03:33:37 PM
Old 02-21-2002
pipe help
i made a lot of processes. here is the code:

main()
{
printf("\nEnter K="); scanf("%d",&k);
printf("Enter L="); scanf("%d",&l);
printf("\nFather id=%d\n",getpid());
x=0;
makechild();
sleep(2);
return 1;
}
int makechild()
{
for(q=1;q<=k;q++)
{
if(f=fork())
{
}
else
{
printf("\nChild id=%d owner=%d\n",getpid(),getppid());
++x;
if(x<l) makechild();
sleep(1);
exit(0);
}
}
return;
}

it basically creates a tree of processes over L rows, each process having K sons.

now, my question is: how can i make these processes comunicate between them?
i figured i would need a lot of pipes but i can't seem to implement them and i'm getting sick with 'broken pipe' error.
can anyone give me some advice?
 

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inttypes

inttypes(5)							File Formats Manual						       inttypes(5)

NAME

       inttypes - fixed size integer data types

SYNOPSIS

DESCRIPTION

       This  header  file  defines  integer  data  types of various sizes.  By using the data types defined in this header file, developers can be
       assured that the data types will have the same properties and behavior on different systems.

       Since not all implementations are required to support all of the integer sizes defined in this manual page, the proper way to see if a par-
       ticular	size  of an integer is supported on the current implementation is to test the symbol that defines its maximum value.  For example,
       if tests false, then that implementation does not support 64-bit unsigned signed integers.

       The header includes header.

       This header file defines the following data type.

	      structure type that is the type of the value returned by the
			     function

       The following macros can be used as formatting options with the family of functions (see printf(3S)).  These macros are used to select  the
       correct formatting option for the integer data types defined earlier in this manual page.

       The  following  macros can be used as formatting options with the family of functions (see scanf(3S)).  These macros are used to select the
       correct formatting option for the integer data types defined earlier in this manual page.

   Notes
       The formatting options for the family of functions all begin with whereas the formatting options for the family of functions all begin with
       These formatting strings may not be interchangeable.

EXAMPLES

       The following example shows how to use one of the print formatting options with the function.

AUTHOR

       was developed by HP.

FILES

SEE ALSO

       imaxdiv(3), printf(3S), scanf(3S), standards(5), stdint(5).

																       inttypes(5)
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