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man: clarify that unknown escapes must be escaped

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https://bugzilla.redhat.com/show_bug.cgi?id=1251334
is about a unit file which has
Environment=TERM=linux PS1=system-upgrade:\w\$\x20
We used to allow that, but after recent tightening of parsing
rules, we barf. Make it clear that this is intentional.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2015-08-07 00:06:15 -04:00
parent 67a3328fbd
commit 388a91b064
1 changed files with 5 additions and 2 deletions
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7
man/systemd.service.xml
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@ -922,7 +922,10 @@
the arguments. Double quotes ("...") and single quotes ('...') may
be used, in which case everything until the next matching quote
becomes part of the same argument. C-style escapes are also
supported, see table below. Quotes themselves are removed after
supported. The table below contains the list of allowed escape
patterns. Only patterns which match the syntax in the table are
allowed; others will result in an error, and must be escaped by
doubling the backslash. Quotes themselves are removed after
parsing and escape sequences substituted. In addition, a trailing
backslash (<literal>\</literal>) may be used to merge lines.
</para>
@ -939,7 +942,7 @@
<literal>&amp;</literal>, and <emphasis>other elements of shell
syntax are not supported</emphasis>.</para>
<para>The command to execute must an absolute path name. It may
<para>The command to execute must be an absolute path name. It may
contain spaces, but control characters are not allowed.</para>
<para>The command line accepts <literal>%</literal> specifiers as