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.\" @(#)confstr.3 8.1 (Berkeley) 6/4/93
.Nd get string-valued configurable variables
.Fn confstr "int name" "char *buf" "size_t len"
This interface is obsoleted by sysctl(3).
function provides a method for applications to get configuration
argument specifies the system variable to be queried.
Symbolic constants for each name value are found in the include file
argument specifies the size of the buffer referenced by the
is a non-null pointer, and
\- 1 bytes of the value are copied into the buffer
The copied value is always null terminated.
The available values are as follows:
environment variable that finds all the standard utilities.
is not successful, \-1 is returned and
Otherwise, if the variable does not have a configuration defined value,
Otherwise, the buffer size needed to hold the entire configuration-defined
If this size is greater than the argument
function may fail and set
for any of the errors specified for the library functions
In addition, the following errors may be reported:
function first appeared in 4.4BSD.