diff options
| -rw-r--r-- | erts/etc/unix/run_erl.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/erts/etc/unix/run_erl.c b/erts/etc/unix/run_erl.c index d7cfbe675e..f8b5da47ab 100644 --- a/erts/etc/unix/run_erl.c +++ b/erts/etc/unix/run_erl.c @@ -904,14 +904,26 @@ static int create_fifo(char *name, int perm) * Find a master device, open and return fd and slave device name. */ +#ifdef HAVE_WORKING_POSIX_OPENPT + /* + * Use openpty() on OpenBSD even if we have posix_openpt() + * as there is a race when read from master pty returns 0 + * if child has not yet opened slave pty. + * (maybe other BSD's have the same problem?) + */ +# if !(defined(__OpenBSD__) && defined(HAVE_OPENPTY)) +# define TRY_POSIX_OPENPT +# endif +#endif + static int open_pty_master(char **ptyslave, int *sfdp) { int mfd; /* Use the posix_openpt if working, as this guarantees creation of the slave device properly. */ -#if defined(HAVE_WORKING_POSIX_OPENPT) || (defined(__sun) && defined(__SVR4)) -# ifdef HAVE_WORKING_POSIX_OPENPT +#if defined(TRY_POSIX_OPENPT) || (defined(__sun) && defined(__SVR4)) +# ifdef TRY_POSIX_OPENPT mfd = posix_openpt(O_RDWR); # elif defined(__sun) && defined(__SVR4) mfd = sf_open("/dev/ptmx", O_RDWR, 0); |