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#include "config.h"
static char buf[4097];
static int bytes_in_buf=0;
int copy_a_bit(int in_fd, int out_fd, int dribble_fd, char *message) {
/* copy whatever's available (max 4k) from in_fd to out_fd (and
dribble_fd if !=-1)
Return number of bytes copied. Bail if error happens.
Note: not re-entrant */
bytes_in_buf=read(in_fd,buf,4096);
if(!bytes_in_buf) return 0;
output_buffer(dribble_fd);
if(output_buffer(out_fd)==0) {
perror(message);
exit(1);
}
return bytes_in_buf;
}
int output_buffer(int fd) {
int bytes_written=0,bytes_to_write=bytes_in_buf;
if(fd<=0) return;
while(bytes_to_write>0) {
bytes_written=write(fd,buf,bytes_to_write);
if(bytes_written==-1) return 0;
bytes_to_write-=bytes_written;
}
return bytes_in_buf;
}
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