how to do getpwnam/getpwuid etc in tcl

does tcl have a standard way of doing NSS lookups (get开发者_开发技巧pwnam, setpwent,...)

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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).