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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fvwm/fvwmlib.h>
#include "../fvwm/module.h"
/************************************************************************
*
* Reads a single packet of info from fvwm. Prototype is:
* unsigned long header[HEADER_SIZE];
* unsigned long *body;
* int fd[2];
* void DeadPipe(int nonsense); * Called if the pipe is no longer open *
*
* ReadFvwmPacket(fd[1],header, &body);
*
* Returns:
* > 0 everything is OK.
* = 0 invalid packet.
* < 0 pipe is dead. (Should never occur)
* body is a malloc'ed space which needs to be freed
*
**************************************************************************/
int ReadFvwmPacket(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,HEADER_SIZE*sizeof(unsigned long))) >0)
{
if(header[0] == START_FLAG)
{
body_length = header[2]-HEADER_SIZE;
*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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