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lognameposix - Online in the Cloud

Run lognameposix in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command lognameposix that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


logname — return the user's login name

SYNOPSIS


logname

DESCRIPTION


The logname utility shall write the user's login name to standard output. The login name
shall be the string that would be returned by the getlogin() function defined in the
System Interfaces volume of POSIX.1‐2008. Under the conditions where the getlogin()
function would fail, the logname utility shall 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 shall affect the execution of logname:

LANG Provide a default value for the internationalization variables that are unset or
null. (See the Base Definitions volume of POSIX.1‐2008, Section 8.2,
Internationalization Variables for the precedence of internationalization
variables used to determine the values of locale categories.)

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

LC_CTYPE Determine the locale for the interpretation of sequences of bytes of text data
as characters (for example, single-byte 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 catalogs for the processing of LC_MESSAGES.

ASYNCHRONOUS EVENTS


Default.

STDOUT


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

"%s\n", <login name>

STDERR


The standard error shall be used only for diagnostic messages.

OUTPUT FILES


None.

EXTENDED DESCRIPTION


None.

EXIT STATUS


The following exit values shall be returned:

0 Successful completion.

>0 An error occurred.

CONSEQUENCES OF ERRORS


Default.

The following sections are informative.

APPLICATION USAGE


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

EXAMPLES


None.

RATIONALE


The passwd file is not listed as required because the implementation may have other means
of mapping login names.

FUTURE DIRECTIONS


None.

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