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Bash sed command with sed itself as replacement, quotes not outputted

user34295

2/13/24, 1:58 PM

I need to modify the content of a file, with the following sed command (which works fine):

sed -i '[email protected].*@'"date.timezone = $TZ"'@' $PHP_INI_DIR/conf.d/symfony.ini

This line should be injected in a script before the exec:

#!/bin/sh
set -e

exec "$@"

So i need another sed to say "replace before exec":

sed '/exec/i \sed -i '[email protected].*@'"date.timezone = $TZ"'@' $PHP_INI_DIR/conf.d/symfony.ini\n' docker-php-entrypoint

The problem are quotes which are not outputted:

#!/bin/sh
set -e

sed -i [email protected].*@"date.timezone = $TZ"@ $PHP_INI_DIR/conf.d/symfony.ini

exec

Putting a backslash \ before '[email protected] does nothing. Any suggestion?

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Salim Aljayousi

2/13/24, 2:14 PM

You can use double quotes within single quotes and vice versa to escape the quotes:

sed '/exec/i \sed -i '"'"'[email protected].*@"date.timezone = $TZ"@' $PHP_INI_DIR/conf.d/symfony.ini\n'"'"' docker-php-entrypoint

This way, the single quotes are escaped within the single quotes and the double quotes are used within the escaped single quotes.

+ 2

user34295

2/13/24, 2:15 PM

Thanks but it seems not working. When I issue the command, the shell seems to wait for another one. (doesn't print output)

Salim Aljayousi

2/13/24, 2:22 PM

It's possible that the command is not being properly terminated. You can try adding a backslash \ at the end of the sed command to indicate that the command continues on the next line: sed "/exec/i sed -i '[email protected].*@'"'date.timezone = \$TZ'"'@' $PHP_INI_DIR/conf.d/symfony.ini\\" docker-php-entrypoint

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choroba

2/13/24, 2:06 PM

This is a shell issue. The shell does "quote removal", so you need to study how quotes behave in the shell. Single quotes can't be nested nor escaped. You have to end the single quoted string to insert a single quote.

sed '/exec/i \sed -i '\''[email protected].*@'\''"date.timezone = $TZ"'\''@'\'' $PHP_INI_DIR/conf.d/symfony.ini\n'

+ 3

user34295

2/13/24, 2:18 PM

Same problem as @Salim answer, when I issue the command the shell doesn't ouput. Seems stuck waiting for termination.

choroba

2/13/24, 2:22 PM

You need to add the rest of the parameters (e.g. the file name).

user34295

2/13/24, 2:23 PM

Sorry, you right, i noticed just after writing the comment.. thanks, i'm testing it!

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