X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fos-release.xml;h=0d7925f07a2a14810960493cc9e6b64e346212bb;hb=e21aee149493ac510b1185030ffa1619f229ce08;hp=759c04d320456ddfc5887d0bdbb6c3ae62069bd6;hpb=01c3a63e179ae7abb7447570a82087289d1bcab4;p=elogind.git
diff --git a/man/os-release.xml b/man/os-release.xml
index 759c04d32..0d7925f07 100644
--- a/man/os-release.xml
+++ b/man/os-release.xml
@@ -58,23 +58,37 @@
contains operating system identification data.
The basic file format of
- os-release is a
- newline-separated list of environment-like
- shell-compatible variable assignments. It is possible
- to source the configuration from shell scripts,
- however, beyond mere variable assignments no shell
- features are supported, allowing applications to read
- the file without implementing a shell compatible
- execution engine.
+ os-release is a newline-separated
+ list of environment-like shell-compatible variable
+ assignments. It is possible to source the
+ configuration from shell scripts, however, beyond mere
+ variable assignments no shell features are supported
+ (this means variable expansion is explicitly not
+ supported), allowing applications to read the file
+ without implementing a shell compatible execution
+ engine. Variable assignment values should be enclosed
+ in double or single quotes if they include spaces,
+ semicolons or other special characters outside of A-Z,
+ a-z, 0-9. All strings should be in UTF-8 format, and
+ non-printable characters should not be used. If double
+ or single quotes or backslashes are to be used within
+ variable assignments they should be escaped with
+ backslashes, following shell style. It is not
+ supported to concatenate multiple individually quoted
+ strings. Lines beginning with "#" shall be ignored as
+ comments.
/etc/os-release contains
data that is defined by the operating system vendor
and should not be changed by the administrator.
- Depending on the operating system other
- configuration files might be checked for OS
- identification as well, however only as
- fallback.
+ As this file only encodes names and identifiers
+ it should not be localized.
+
+ For a longer rationale for
+ /etc/os-release please refer to
+ the Announcement of /etc/os-release.
@@ -90,10 +104,10 @@
A string identifying
the operating system, without a
- version string, and not necessarily
- suitable for presentation to the
- user. If not set defaults to
- Linux. Example:
+ version component, and suitable for
+ presentation to the user. If not set
+ defaults to
+ NAME=Linux. Example:
NAME=Fedora or
NAME="Debian
GNU/Linux".
@@ -104,35 +118,82 @@
A string identifying
the operating system version,
- excluding any name information and
- suitable for presentation to the
- user. Example:
- VERSION=15 or
- VERSION="15
- (Rawhide)".
+ excluding any OS name information,
+ possibly including a release code
+ name, and suitable for presentation to
+ the user. This field is
+ optional. Example:
+ VERSION=17 or
+ VERSION="17 (Beefy
+ Miracle)".
ID=
A lower-case string
+ (no spaces or other characters outside
+ of 0-9, a-z, ".", "_" and "-")
identifying the operating system,
excluding any version information and
- suitable for processing by scripts. If
- not set defaults to
- linux. Example:
- ID=fedora.
+ suitable for processing by scripts or
+ usage in generated file names. If not
+ set defaults to
+ ID=linux. Example:
+ ID=fedora or
+ ID=debian.
+
+
+
+ ID_LIKE=
+
+ A space-separated list
+ of operating system identifiers in the
+ same syntax as the
+ ID= setting. Should
+ list identifiers of operating systems
+ that are closely related to the local
+ operating system in regards to
+ packaging and programming interfaces,
+ for example listing one or more
+ distribution identifiers the local
+ distribution is a derivative
+ from. Build scripts and similar should
+ check this variable if they need to
+ identify the local operating system
+ and the value of
+ ID= is not
+ recognized. Operating systems should
+ be listed in order of how closely the
+ local operating system relates to the
+ listed ones, starting with the
+ closest. This field is
+ optional. Example: for an operating
+ system with
+ ID=centos an
+ assignment of ID_LIKE="rhel
+ fedora" would be
+ appropriate. For an operating systemd
+ with ID=ubuntu an
+ assignment of
+ ID_LIKE=debian is
+ appropriate.
VERSION_ID=
A lower-case string
- (mostly numeric) identifying the
- operating system version, excluding
- any name information and suitable for
- processing by scripts. Example:
- VERSION_ID=15.
+ (mostly numeric, no spaces or other
+ characters outside of 0-9, a-z, ".",
+ "_" and "-") identifying the operating
+ system version, excluding any OS name
+ information or release code name, and
+ suitable for processing by scripts or
+ usage in generated file names. This
+ field is optional. Example:
+ VERSION_ID=17 or
+ VERSION_ID=11.04.
@@ -141,11 +202,12 @@
A pretty operating
system name in a format suitable for
presentation to the user. May or may
- not contain an OS version of some
- kind, as suitable. If not set defaults
- to Linux. Example:
- PRETTY_NAME=Fedora 15
- (Rawhide).
+ not contain a release code name or OS
+ version of some kind, as suitable. If
+ not set defaults to
+ PRETTY_NAME="Linux". Example:
+ PRETTY_NAME="Fedora 17 (Beefy
+ Miracle)".
@@ -157,19 +219,34 @@
should be specified as string suitable
for inclusion in the ESC [ m
ANSI/ECMA-48 escape code for setting
- graphical rendition. Example:
- ANSI_COLOR=0;31 for
- red, or
- ANSI_COLOR=1;34 for
- light blue.
+ graphical rendition. This field is
+ optional. Example:
+ ANSI_COLOR="0;31"
+ for red, or
+ ANSI_COLOR="1;34"
+ for light blue.
+
+
+
+ CPE_NAME=
+
+ A CPE name for the
+ operating system, following the Common
+ Platform Enumeration
+ Specification as proposed by
+ the MITRE Corporation. This field
+ is optional. Example:
+ CPE_NAME="cpe:/o:fedoraproject:fedora:17"
+
- If you interpreting this file from code or a
- shell script, use the ID and VERSION_ID fields. When
- looking for an OS identification string for
- presentation to the user use the PRETTY_STRING
- field.
+ If you are reading this file from C code or a
+ shell script to determine the OS or a specific version
+ of it, use the ID and VERSION_ID fields. When looking
+ for an OS identification string for presentation to
+ the user use the PRETTY_NAME field.
Note that operating system vendors may choose
not to provide version information, for example to
@@ -182,18 +259,22 @@
Example
NAME=Fedora
-VERSION=15 (Rawhide)
+VERSION="17 (Beefy Miracle)"
ID=fedora
-VERSION_ID=15
-PRETTY_NAME=Fedora 15 (Rawhide)
-ANSI_COLOR=0;34
+VERSION_ID=17
+PRETTY_NAME="Fedora 17 (Beefy Miracle)"
+ANSI_COLOR="0;34"
+CPE_NAME="cpe:/o:fedoraproject:fedora:17"
See Also
systemd1,
- lsb_release1
+ lsb_release1,
+ hostname5,
+ machine-id5,
+ machine-info5