366    int nrread;  in read_buf()  local
368    nrread = read(fd, buf, PBUFSIZ);  in read_buf()
369    if (nrread == -1) {  in read_buf()
373    buf[nrread] = '\0';  in read_buf()
375    return nrread;  in read_buf()
433    int nrread;  in read_from_gdb_write_to_pid()  local
435    nrread = read_buf(from_gdb, buf, "from gdb on stdin");  in read_from_gdb_write_to_pid()
436    if (nrread <= 0) {  in read_from_gdb_write_to_pid()
437       if (nrread == 0)   in read_from_gdb_write_to_pid()
445    return write_buf(to_pid, buf, nrread, "to_pid", /* notify */ True);  in read_from_gdb_write_to_pid()
457    int nrread;  in read_from_pid_write_to_gdb()  local
459    nrread = read_buf(from_pid, buf, "from pid");  in read_from_pid_write_to_gdb()
460    if (nrread <= 0) {  in read_from_pid_write_to_gdb()
461       if (nrread == 0)   in read_from_pid_write_to_gdb()
469    return write_buf(to_gdb, buf, nrread, "to_gdb", /* notify */ False);  in read_from_pid_write_to_gdb()