utmps

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utmps - a secure utmpx and wtmp implementation

utmps is a library implementing the utmpx.h family of functions, for use with C libraries that do not implement them, such as musl - or that do implement them, but in an insecure way, such as... all the other libcs.

Its particularity is that it does not use setuid or setgid programs or files; it does not give random programs the right to modify system-wide files. Instead, it comes with a daemon that must be running for utmp account to be functional, and that takes charge of the utmp data management itself; utmpx.h primitives simply communicate with that daemon.

See https://skarnet.org/software/utmps/ for details.

• Installation

See the INSTALL file.

• Contact information

Laurent Bercot