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/usr/bin/logname
logname
The logname utility writes the user's login name to standard output. The login name is the string that would be returned by the getlogin(3C) function. Under the conditions where getlogin() would fail, logname will write a diagnostic message to standard error and exit with a non-zero exit status.
The logname utility writes the user's login name to standard output. The login name is the string that would be returned by the getlogin(3C) function. If getlogin() does not return successfully, the name corresponding to the real user IDof the calling process is used instead.
See environ(5) for descriptions of the following environment variables that affect the execution of logname: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES, and NLSPATH.
The following error values are returned: 0
Successful completion.
An error occurred.
environment for user at login time
user and accounting information
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Committed |
| Standard See standards(5). |
env(1), login(1), getlogin(3C), utmpx(4), attributes(5), environ(5), standards(5)