Name

machineenv — set the "machine" environment variables from the dynamic values

Synopsis

machineenv {next-prog}

Description

machineenv is a chain-loading utility that sets environment variables and then chain loads to next-prog with the execvp(3) function.

next-prog may contain its own command line options, which machineenv will ignore.

The following environment variables are set:

MACHINEID

Set to the human-readable hexadecimal non-punctuated form of the machine ID, for details on which (and some caveats as to mis-use) see machine-id(7).

HOSTNAME

Set to the dynamic "host" name, as initialized by set-dynamic-hostname(1) (for example) and obtained by the gethostname(2) function.

DOMAINNAME

Set to the dynamic "domain" name, as obtained by the getdomainname(2) function.

Bugs

As of version 1.34 this program no longer employs the GNU C library nor the BSD C library for environment variable handling. The previously documented workaround for those libraries' having memory leaks in their setenv(3) and clearenv(3) functions, is therefore no longer necessary.

See also

  • userenv-fromenv(1)

  • setenv(1)

  • envuidgid(1)

  • clearenv(1)

Author

Jonathan de Boyne Pollard