Originální popis anglicky:
logname - return the user's login name
Návod, kniha: POSIX Programmer's Manual
logname
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
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.
None.
None.
Not used.
None.
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, 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 .
Default.
The
logname utility output shall be a single line consisting of the
user's login name:
The standard error shall be used only for diagnostic messages.
None.
None.
The following exit values shall be returned:
- 0
- Successful completion.
- >0
- An error occurred.
Default.
The following sections are informative.
The
logname utility explicitly ignores the
LOGNAME environment
variable because environment changes could produce erroneous results.
None.
The
passwd file is not listed as required because the implementation may
have other means of mapping login names.
None.
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 original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
