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doc: os-release: mention all shell characters that must be escaped 

Since the manpage already talks about shell-compatibility, it should be
more accurate about what needs to be escaped and how.
This commit is contained in:
Mantas Mikulėnas 2014-12-24 14:46:20 +02:00 committed by Zbigniew Jędrzejewski-Szmek
parent 7115e487cd
commit 321a3f5133
1 changed files with 9 additions and 10 deletions
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19
man/os-release.xml
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@ -68,17 +68,16 @@
(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,
engine. Variable assignment values must 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.</para>
a-z, 0-9. Shell special characters ("$", quotes,
backslash, backtick) must be escaped with backslashes,
following shell style. All strings should be in UTF-8
format, and non-printable characters should not be used.
It is not supported to concatenate multiple individually
quoted strings. Lines beginning with "#" shall be
ignored as comments.</para>
<para>The file <filename>/etc/os-release</filename>
takes precedence over