#include "jove.h" #include <signal.h> #include <errno.h> #ifdef PIPEPROCS /* only needed for systems with iproc-pipes */ #ifdef BSD_SIGS # define pause() sigpause(0L) #endif struct header { int pid, nbytes; char buf[10]; }; #define HEADER_SIZE (2 * sizeof (int)) /* JOVE sends SIGQUIT whenever it wants the kbd process (this program) to stop competing for input from the keyboard. JOVE does this when JOVE realizes that there are no more interactive processes running. The reason we go through all this trouble is that JOVE slows down a lot when it's getting its keyboard input via a pipe. */ private SIGRESULT strt_read proto((int)); private SIGRESULT hold_read(junk) int junk; /* passed in when invoked by a signal; of no interest */ { signal(KBDSIG, strt_read); pause(); SIGRETURN; } private SIGRESULT strt_read(junk) int junk; { signal(KBDSIG, hold_read); SIGRETURN; } int main(argc, argv) int argc; char **argv; { struct header header; int pid, n; signal(SIGINT, SIG_IGN); pid = getpid(); header.pid = pid; hold_read(0); for (;;) { n = read(0, (UnivPtr) header.buf, sizeof (header.buf)); if (n == -1) { if (errno != EINTR) break; continue; } header.nbytes = n; write(1, (UnivPtr) &header, HEADER_SIZE + n); } return 0; } #else /* !PIPEPROCS */ int main() { return 0; } #endif /* !PIPEPROCS */