NAME

logname - return the user's login name

 SYNOPSIS

logname

 DESCRIPTION

The logname utility will write the user's login name to standard output. The login name is the string that would be returned by the XSH specification getlogin() function. Under the conditions where the getlogin() function would fail, the logname utility will write a diagnostic message to standard error and exit with a non-zero exit status.

 OPTIONS

None.

 OPERANDS

None.

 STDIN

Not used.

 INPUT FILES

None.

 ENVIRONMENT VARIABLES

The following environment variables affect the execution of logname:

LANG

Provide a default value for the internationalisation variables that are unset or null. If LANG is unset or null, the corresponding value from the implementation-dependent default locale will be used. If any of the internationalisation variables contains an invalid setting, the utility will behave as if none of the variables had been defined.

LC_ALL

If set to a non-empty string value, override the values of all the other internationalisation variables.

LC_CTYPE

Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single- as opposed to multi-byte characters in arguments).

LC_MESSAGES

Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.

NLSPATH

Determine the location of message catalogues for the processing of LC_MESSAGES .

 ASYNCHRONOUS EVENTS

Default.

 STDOUT

The logname utility output will be a single line consisting of the user's login name:

"%s\n", <login name>

 STDERR

Used only for diagnostic messages.

 OUTPUT FILES

None.

 EXTENDED DESCRIPTION

None.

 EXIT STATUS

The following exit values are returned:

0

Successful completion.

>0

An error occurred.

 CONSEQUENCES OF ERRORS

Default.

 APPLICATION USAGE

The logname utility explicitly ignores the LOGNAME environment variable because environment changes could produce erroneous results.

 EXAMPLES

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

id, who.