Regular sed error messages at boot process [live-usb]

[Member tamix]

In case a fix has been done meanwhile, just forget this post.

[Localizing the related shell function]

. antiX-19.4 file ‘/live/etc/init.d/live-init’: set_server_dpi() lines 978/980
. antiX-21 file ‘/live/etc/init.d/live-init’: set_server_dpi() lines 987/989

[antiX-19.4 boot trace]

>live-init<
...
Setting server dpi to YYY
sed: -e expression #2, char 38: invalid reference \1 on 's' command's RHS
sed: -e expression #2, char 38: invalid reference \1 on 's' command's RHS
...

There are 2 iterations applied to 2 files respectively hence the double
error message. RHS stands for ‘Right Hand Side’ in the s command.

[antiX-21 boot trace]

>live-init<
...
Setting server dpi to YYY
sed: -e expression #2, char 38: invalid reference \1 on 's' command's RHS
...

There is 1 iteration applied to 1 file hence the single error message.
RHS stands for ‘Right Hand Side’ in the s command.

[Suggestion for easy fix: sed command]

Just add the ‘-r’ option to the sed command for allowing the Extended
Regular Expressions (ERE).

1) In the -e expression #1, the substitution does not occur due to the
missing -r option so the ‘+’ are read here as literal characters.
What’s more the ‘p’ command should be removed from the s command to
avoid the line being printed twice.

2) Since in the -e expression #2, the substitution does not occur due
to the missing -r option so the parenthesis ‘()’ are read here as
literal characters.

before correction:

# remove existing dpi argument and add a new one
sed -i -e "/^xserver_arguments/ s/-dpi\s+[0-9]+\s*//p" \
-e "s/^(xserver_arguments\s+)/\1-dpi $dpi /" $file

as a result after correction:

# remove existing dpi argument and add a new one
sed -r -i -e "/^xserver_arguments/ s/-dpi\s+[0-9]+\s*//" \
-e "s/^(xserver_arguments\s+)/\1-dpi $dpi /" $file

Hope it helps.

[Member tamix]

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tamix wrote:

In case a fix has been done meanwhile, just forget this post.

Correction
To all people who feel unconcerned. In case a fix has not been done meanwhile, just forget this post.

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