how to do getpwnam/getpwuid etc in tcl

Question

does tcl have a standard way of doing NSS lookups (getpwnam, setpwent,...)

Answer 1

Tcl doesn't expose those as APIs (it doesn't really use them internally either) but the TclX extension package does support exactly what you want I believe. For example:

package require TclX

set uid [id convert user $tcl_platform(user)]
puts "Your userid is $uid and you are a member of these groups: [id groups]"

If you're using ActiveTcl, you've definitely got the TclX package available (either already installed or available from the teapot repository).