Linux 2.6 - man page for logname (linux section 1posix)
|Linux & Unix Commands - Search Man Pages
LOGNAME(P) POSIX Programmer's Manual LOGNAME(P)
logname - return the user's login name
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 Sys-
tem Interfaces volume of IEEE Std 1003.1-2001. 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.
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 IEEE Std 1003.1-2001, Section 8.2, Inter-
nationalization 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 interna-
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 argu-
Determine the locale that should be used to affect the format and contents of diag-
nostic messages written to standard error.
Determine the location of message catalogs for the processing of LC_MESSAGES .
The logname utility output shall be a single line consisting of the user's login name:
"%s\n", <login name>
The standard error shall be used only for diagnostic messages.
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
CONSEQUENCES OF ERRORS
The following sections are informative.
The logname utility explicitly ignores the LOGNAME environment variable because environ-
ment changes could produce erroneous results.
The passwd file is not listed as required because the implementation may have other means
of mapping login names.
id , who , the System Interfaces volume of IEEE Std 1003.1-2001, getlogin()
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 LOGNAME(P)
All times are GMT -4. The time now is 07:31 PM.