Software
skarnet.org
utmps
What is it ?
utmps is an implementation of the utmpx.h family of functions
performing user accounting on Unix systems.
Traditionally, utmp functionality is provided by the system's
libc. However, not all libcs implement utmp: for instance the
musl libc, on Linux, does not. The
main reason for it is that utmp functionality is difficult to
implement in a secure way; in particular, it is impossible to implement
without either running a daemon or allowing arbitrary programs to tamper
with user accounting.
utmps is a secure implementation of user accounting, using
a daemon as the only authority to manage the utmp and wtmp data; programs
running utmp functions are just clients to this daemon.
Installation
Requirements
- A POSIX-compliant system with a standard C development environment
- GNU make, version 3.81 or later
- skalibs version
2.11.1.0 or later. It's a build-time requirement. It's also a run-time
requirement if you link against the shared version of the skalibs
library.
- s6 version
2.11.0.1 or later. It's a run-time requirement only, to run
the utmpd and wtmpd services (and can be done without if you have a
suitable replacement for
s6-ipcserver).
Licensing
utmps is free software. It is available under the
ISC license.
Download
Compilation
- See the enclosed INSTALL file for installation details.
Upgrade notes
- This page lists the differences to be aware of between
the previous versions of utmps and the current one.
Reference
Commands
Libraries
Related resources
utmps discussion
- utmps is discussed on the
skaware mailing-list.