Sys.info {base} | R Documentation |
Extract System and User Information
Description
Reports system and user information.
Usage
Sys.info()
Details
This uses POSIX or Windows system calls. Note that OS names (sysname
) might not
be what you expect: for example macOS identifies itself as
‘Darwin’ and Solaris as ‘SunOS’.
Sys.info()
returns details of the platform R is running on,
whereas R.version
gives details of the platform R was
built on: the release
and version
may well be different.
Value
A character vector with fields
sysname |
The operating system name. |
release |
The OS release. |
version |
The OS version. |
nodename |
A name by which the machine is known on the network (if any). |
machine |
A concise description of the hardware, often the CPU type. |
login |
The user's login name, or |
user |
The name of the real user ID, or |
effective_user |
The name of the effective user ID, or
|
udomain |
The domain name for the user. Only available on Windows. |
- On Unix-alike platforms:
-
The first five fields come from the
uname(2)
system call. The login name comes fromgetlogin(2)
, and the user names fromgetpwuid(getuid())
andgetpwuid(geteuid())
. - On Windows:
-
Fields
login
,user
andeffective_user
give the same value.udomain
is the corresponding domain.
Note
The meaning of release
and version
is system-dependent:
on a Unix-alike they normally refer to the kernel. There, usually
release
contains a numeric version and version
gives
additional information. Examples for release
:
"4.17.11-200.fc28.x86_64" # Linux (Fedora) "3.16.0-5-amd64" # Linux (Debian) "17.7.0" # macOS 10.13.6 "5.11" # Solaris
There is no guarantee that the node or login or user names will be what you might reasonably expect. (In particular on some Linux distributions the login name is unknown from sessions with re-directed inputs.)
The use of alternatives such as system("whoami")
is not
portable: the POSIX command system("id")
is much more portable
on Unix-alikes, provided only the POSIX options -[Ggu][nr] are
used (and not the many BSD and GNU extensions). whoami
is
equivalent to id -un
(on Solaris, /usr/xpg4/bin/id -un
).
Windows may report unexpected versions: there, see the help for
See Also
.Platform
, and R.version
.
sessionInfo()
gives a synopsis of both your system and
the R session (and gives the OS version in a human-readable form).
Examples
Sys.info()
## An alternative (and probably better) way to get the login name on Unix
Sys.getenv("LOGNAME")