| Subject: | Bad ttynum's on HPUX |
The ttynum value returned on HPUX is invalid. The current code, using makedev, returns a rather large integer, or a negative int if their is no tty associated with the process.
A better approach in my opinion would be to use the devnm() function and simply return a string for the ttyname, or undef if there is no associated tty.
Here's a bit of sample code, partially lifted from a post by Dan Mercer in comp.unix.programmer:
#include <devnm.h>
...
char path[MAXPATHLEN+1]; /* from sys/param.h */
struct pst_status pst;
...
if(pst.pst_term.psd_major != -1){ /* -1 means no associated tty */
devnm(S_IFCHR, /* from sys/stat.h */
(dev_t)((pst.pst_term.psd_major<<24) |pst.pst_term.psd_minor),
path,
sizeof path,
1);
}
Then "path" will contain something like "/dev/pty/ttyp4", for example. You could always strip out the leading "/dev/xxx" junk, too, if you'd like to keep it closer to what a ps -ef returns.
Anyway, that's what I'm doing for the Ruby port. :)
Regards,
Dan