Custom Shell - Get Remote User's IP

ta0kira · 08-19-2011, 12:14 PM

Yes, that's essentially what I had in mind. I haven't actually used the utmp system, however.

Looking at the manpage, getutline/getutxline should find the correct entry based on ut_line; if you use that you shouldn't need to search manually. The manpage also says that you should use "utx" variants over "ut" variants because the former are standardized by POSIX.
Kevin Barry

linuxdev817 · 08-24-2011, 01:35 PM

Based off of your advice, this is what I ended up using:

Code:

struct utmpx ut_entry;
struct utmpx *my_ut_entry;
strcpy((ut_entry.ut_line, ttyname(STDIN_FILENO) + strlen("/dev/"));
setutxent();
my_ut_entry = getutxline(&ut_entry);

Thanks to everyone that responded to my post.