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#include <stdio.h>
#include <stdlib.h>
#include "aftersteplib.h"
#include "../afterstep/module.h"
/************************************************************************
*
* Reads a single packet of info from AfterStep. Prototype is:
* unsigned long header[3];
* unsigned long *body;
* int fd[2];
* void DeadPipe(int nonsense); /* Called if the pipe is no longer open
*
* ReadASPacket(fd[1],header, &body);
*
* Returns:
* > 0 everything is OK.
* = 0 invalid packet.
* < 0 pipe is dead. (Should never occur)
*
**************************************************************************/
int ReadASPacket(int fd, unsigned long *header, unsigned long **body)
{
int count,total,count2,body_length;
char *cbody;
extern void DeadPipe(int);
if((count = read(fd,header,3*sizeof(unsigned long))) >0)
{
if(header[0] == START_FLAG)
{
body_length = header[2]-3;
*body = (unsigned long *)
safemalloc(body_length * sizeof(unsigned long));
cbody = (char *)(*body);
total = 0;
while(total < body_length*sizeof(unsigned long))
{
if((count2=
read(fd,&cbody[total],
body_length*sizeof(unsigned long)-total)) >0)
{
total += count2;
}
else if(count2 < 0)
{
DeadPipe(1);
}
}
}
else
count = 0;
}
if(count <= 0)
DeadPipe(1);
return count;
}
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