size_t
confstr(
int name
, char *buf
, size_t len
)
The
confstr()
function provides a method for applications to get configuration
defined string values.
The
name
argument specifies the system variable to be queried.
Symbolic constants for each name value are found in the include file
<unistd.h>
.
The
len
argument specifies the size of the buffer referenced by the
argument
buf
.
If
len
is non-zero,
buf
is a non-null pointer, and
name
has a value, up to
len
- 1 bytes of the value are copied into the buffer
buf
.
The copied value is always null terminated.
The available values are as follows:
_CS_PATH
PATH
environment variable that finds all the standard utilities.
len
,
the string in
buf
was truncated.
In addition, the following errors may be reported:
EINVAL
]
name
argument is invalid.