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system.pl -- SICStus 4-compatible library(system).
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See also
- https://sicstus.sics.se/sicstus/docs/4.6.0/html/sicstus.html/lib_002dsystem.html
Source environ(?Name, ?Value) is nondet
Source environ(?Name, ?Value, +Source) is nondet
True if Value is an atom associated with the environment variable or system property Name.

Source may be properties (to get only system properties), environment (to get only environment variables), or merged (the default, to get both, with system properties taking precedence over environment variables of the same name).

- SICStus 4
To be done
- Mode -Name is not supported.
Because SWI-Prolog doesn't have an obvious equivalent to
SICStus system properties, these predicates currently
behave as if no system properties are defined,
i. e. only environment variables are returned.

Re-exported predicates

The following predicates are exported from this file while their implementation is defined in imported modules or non-module files loaded by this module.

Source datime(-Datime) is det
Unifies Datime with the current date and time as a datime/6 record of the form datime(Year,Month,Day,Hour,Min,Sec). All fields are integers.
- sicstus
Source datime(+When, -Datime) is det
datime(-When, +Datime) is det
True when Datime is a datime/6 record that reflects the time stamp When.
- sicstus
Source now(-When) is det
Unify when with the current time-stamp
- sicstus

Undocumented predicates

The following predicates are exported, but not or incorrectly documented.