class TEnv: public TObject

TEnv

The TEnv class reads config files, by default named .rootrc. Three
types of config files are read: global, user and local files. The
 global file is $ROOTSYS/etc/system<name> (or ROOTETCDIR/system<name>)
the user file is $HOME/<name> and the local file is ./<name>.
By setting the shell variable ROOTENV_NO_HOME=1 the reading of
the $HOME/<name> resource file will be skipped. This might be useful
in case the home directory resides on an automounted remote file
system and one wants to avoid this file system from being mounted.

The format of the .rootrc file is similar to the .Xdefaults format:

[+]<SystemName>.<RootName|ProgName>.<name>[(type)]:  <value>

Where <SystemName> is either Unix, WinNT, MacOS or Vms,
<RootName> the name as given in the TApplication ctor (or "RootApp"
in case no explicit TApplication derived object was created),
<ProgName> the current program name and <name> the resource name,
with optionally a type specification. <value> can be either a
string, an integer, a float/double or a boolean with the values
TRUE, FALSE, ON, OFF, YES, NO, OK, NOT. Booleans will be returned as
an integer 0 or 1. The options [+] allows the concatenation of
values to the same resouce name.

E.g.:

Unix.Rint.Root.DynamicPath: .:$ROOTSYS/lib:~/lib
myapp.Root.Debug:  FALSE
TH.Root.Debug: YES
*.Root.MemStat: 1

<SystemName> and <ProgName> or <RootName> may be the wildcard "*".
A # in the first column starts comment line.

For the currently defined resources (and their default values) see
$ROOTSYS/etc/system.rootrc.

Note that the .rootrc config files contain the config for all ROOT
based applications.