gnu/abc-shell/tty.c

   1 #include <sys/stat.h>
   2 #include "sh.h"
   3 #define EXTERN
   4 #include "tty.h"
   5 #undef EXTERN
   6
   7 #ifdef AMIGA
   8 #define TIOCGETP 1
   9 #define TIOCGETC 2
  10 #define TIOCSETN 3
  11 #define TIOCSETC 4
  12 #endif
  13
  14 /* Initialize tty_fd.  Used for saving/reseting tty modes upon
  15  * foreground job completion and for setting up tty process group.
  16  */
  17 void
  18 tty_init(int init_ttystate)
  19 {
  20         int        do_close = 1;
  21         int        tfd;
  22
  23         if (tty_fd >= 0) {
  24                 close(tty_fd);
  25                 tty_fd = -1;
  26         }
  27         tty_devtty = 1;
  28
  29 #ifdef AMIGA
  30         if ((tfd = open("CONSOLE:", O_RDWR, 0)) < 0) {
  31 #else
  32         if ((tfd = open("/dev/tty", O_RDWR, 0)) < 0) {
  33 #endif
  34                 tty_devtty = 0;
  35                 warningf(false, "No controlling tty (open /dev/tty: %s)",
  36                 strerror(errno));
  37         }
  38
  39         if (tfd < 0) {
  40                 do_close = 0;
  41                 if (isatty(0))
  42                         tfd = 0;
  43                 else if (isatty(2))
  44                         tfd = 2;
  45                 else {
  46                         warningf(false, "Can't find tty file descriptor");
  47                         return;
  48                 }
  49         }
  50         if ((tty_fd = fcntl(tfd, F_DUPFD, FDBASE)) < 0) {
  51                 warningf(false, "j_ttyinit: dup of tty fd failed: %s",
  52                     strerror(errno));
  53 #ifndef __amigaos4__
  54         } else if (fcntl(tty_fd, F_SETFD, FD_CLOEXEC) < 0) {
  55                 warningf(false, "j_ttyinit: can't set close-on-exec flag: %s",
  56                     strerror(errno));
  57                 close(tty_fd);
  58                 tty_fd = -1;
  59 #endif
  60         } else if (init_ttystate)
  61                 //tcgetattr(tty_fd, &tty_state);
  62         if (do_close)
  63                 close(tfd);
  64 }
  65
  66 void
  67 tty_close(void)
  68 {
  69         if (tty_fd >= 0) {
  70                 close(tty_fd);
  71                 tty_fd = -1;
  72         }
  73 }
  74