Environment Functions

Functions
*string	Qore::getenv (string var)
	Retrieves the value of an environment variable or NOTHING if the variable is not set. More...
nothing	Qore::getenv ()
	This function variant does nothing at all; it is only included for backwards-compatibility with qore prior to version 0.8.0 for functions that would ignore type errors in arguments. More...
int	Qore::setenv (string env, softstring val)
	Sets an environment variable to a value. More...
nothing	Qore::setenv ()
	This function variant does nothing at all; it is only included for backwards-compatibility with qore prior to version 0.8.0 for functions that would ignore type errors in arguments. More...
int	Qore::unsetenv (string env)
	Unsets an environment variable. More...
nothing	Qore::unsetenv ()
	This function variant does nothing at all; it is only included for backwards-compatibility with qore prior to version 0.8.0 for functions that would ignore type errors in arguments. More...

Detailed Description

Environment functions

Function Documentation

*string Qore::getenv

(

string

var

)

Retrieves the value of an environment variable or NOTHING if the variable is not set.

Restrictions:

Qore::PO_NO_EXTERNAL_INFO

Code Flags:

CONSTANT

Parameters

var	the name of the environment variable

Returns

the value of an environment variable or NOTHING if the variable is not set

Example:

my *string $v = getenv("PATH");

Since

Qore 0.8.4 tagged with PO_NO_EXTERNAL_INFO

nothing Qore::getenv

(

)

This function variant does nothing at all; it is only included for backwards-compatibility with qore prior to version 0.8.0 for functions that would ignore type errors in arguments.

Restrictions:

Qore::PO_NO_EXTERNAL_INFO

Code Flags:

NOOP

int Qore::setenv	(	string	env,
		softstring	val
	)

Sets an environment variable to a value.

Restrictions:

Qore::PO_NO_PROCESS_CONTROL

Parameters

env	the name of the environment variable
val	the new value of the environment variable

Returns

-1 for error or 0 for success; if an error occurs, errno() and/or strerror() can be used to get the error code or message

Example:

if (setenv("PATH", "/bin:/usr/bin"))
    printf("error setting PATH: %s\n", strerror());

See also

unsetenv() to unset or clear an environment variable

Since

Qore 0.8.4 tagged with PO_NO_PROCESS

nothing Qore::setenv

(

)

This function variant does nothing at all; it is only included for backwards-compatibility with qore prior to version 0.8.0 for functions that would ignore type errors in arguments.

Restrictions:

Qore::PO_NO_PROCESS_CONTROL

Code Flags:

NOOP

int Qore::unsetenv

(

string

env

)

Unsets an environment variable.

Restrictions:

Qore::PO_NO_PROCESS_CONTROL

Parameters

env	the name of the environment variable to unset

Returns

-1 for error or 0 for success; if an error occurs, errno() and/or strerror() can be used to get the error code or message

Example:

if (unsetenv("PATH"))
    printf("error unsetting PATH: %s\n", strerror());

See also

setenv() to set an environment variable to a value

Since

Qore 0.8.4 tagged with PO_NO_PROCESS

nothing Qore::unsetenv

(

)

This function variant does nothing at all; it is only included for backwards-compatibility with qore prior to version 0.8.0 for functions that would ignore type errors in arguments.

Restrictions:

Qore::PO_NO_EXTERNAL_INFO

Code Flags:

NOOP