Is there any way to redirect /dev/tty similarly to how stdin can be redirected (e.g., like "echo ... | someexecutable")?
I'm working with an executable (openssl in ocsp mode) that reads a password via /dev/tty (instead of stdin) because normally it wants to get that password from the user even if the user invoked the executable by running a script (and because it uses stdin for data input). (I can see the use of /dev/tty by using strace.) However, I'm trying to invoke that executable from a script and have it run non-interactively. (It's an example/test script that should be interactive and does not need to be secure.) Other OpenSSL subcommands like "openssl ca" and "openssl req" have command-line options for specifying passwords non-interactively. However, the "openssl ocsp" subcommand does not, so I'm trying to find some other way to suppress the interactive prompting for the password. VMS's equivalent of /dev/tty was its environment variable SYS$COMMAND. SYS$COMMAND by default continued to refer to the interactive terminal even when SYS$INPUT (VMS's equivalent to the stdin descriptor) was redirected. Therefore, scripts could read from SYS$COMMAND when they wanted to read something that normally came from the user even when standard input was redirected. However, a second script calling that first script could specifically set SYS$COMMAND if it wanted to non-interactively provide that input that the first script expected to normally come from the user. Does Cygwin (or Unix/Linux, for that matter) have any equivalent way of redirecting /dev/tty? Can /dev/tty be redirected at all? (I would guess that something could be done with pseudoterminals, but I know very little about them.) If so, can it be done with existing commands used in a script (as opposed to via lower-level programming)? (Can pseudoterminals be set up/created/whatever via existing commands, or only via library calls?) Thanks, Daniel -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
