We have the following statement in a bash script running on AIX 7.2:

[ -n "$(grep \"^$2=\" \"$1\" 2>/dev/null)" ]

During run, $2 gets the value nagios_retcode= and $1 gets /var/lib/ibm72dev_backup_state.txt.

This statement does not work because the resulting line looks like

grep '"^nagios_retcode="' '"/var/lib/ibm72dev_backup_state.txt"'

On Linux it does work, but not on AIX. Where does the extra apostrophes
come from? And how to avoid it?

Thanks in advance for your help!

Regards
Burkhard

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Am 19.07.2018 um 16:07 schrieb Burkhard Schultheis:

We have the following statement in a bash script running on AIX 7.2:

[ -n "$(grep \"^$2=\" \"$1\" 2>/dev/null)" ]

During run, $2 gets the value nagios_retcode= and $1 gets /var/lib/ibm72dev_backup_state.txt.

This statement does not work because the resulting line looks like

grep '"^nagios_retcode="' '"/var/lib/ibm72dev_backup_state.txt"'

On Linux it does work, but not on AIX. Where does the extra apostrophes
come from? And how to avoid it?

Thanks in advance for your help!

Regards
Burkhard

You can try the following script:

#!/bin/bash

P1="^nagios_update="
P2="/var/lib/ibm72dev_backup_state.txt"
echo "P1: $P1, P2: $P2"
[ -n "$(grep \"^$P1=\" \"$P2\" 2>/dev/null)" ]
RC=$?
echo "RC: $RC"
if [ $RC -ne 0 ]
then
echo "does not work"
else
echo "OK"
fi

On my AIX system it gives "does not work, P1 and P2 are shown without
any quotes.

Regards
Burkhard

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Am 19.07.2018 um 16:50 schrieb Burkhard Schultheis:

Am 19.07.2018 um 16:07 schrieb Burkhard Schultheis:

We have the following statement in a bash script running on AIX 7.2:

[ -n "$(grep \"^$2=\" \"$1\" 2>/dev/null)" ]

During run, $2 gets the value nagios_retcode= and $1 gets
/var/lib/ibm72dev_backup_state.txt.

This statement does not work because the resulting line looks like

grep '"^nagios_retcode="' '"/var/lib/ibm72dev_backup_state.txt"'

On Linux it does work, but not on AIX. Where does the extra
apostrophes come from? And how to avoid it?

Thanks in advance for your help!

Regards
Burkhard

You can try the following script:

#!/bin/bash

P1="^nagios_update="
P2="/var/lib/ibm72dev_backup_state.txt"
echo "P1: $P1, P2: $P2"
[ -n "$(grep \"^$P1=\" \"$P2\" 2>/dev/null)" ]

[ -n "$(grep \"$P1\" \"$P2\" 2>/dev/null)" ]

RC=$?
echo "RC: $RC"
if [ $RC -ne 0 ]
then
        echo "does not work"
else
        echo "OK"
fi

Regards
Burkhard

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Am 19.07.2018 um 16:07 schrieb Burkhard Schultheis:

We have the following statement in a bash script running on AIX 7.2:

[ -n "$(grep \"^$2=\" \"$1\" 2>/dev/null)" ]

During run, $2 gets the value nagios_retcode= and $1 gets /var/lib/ibm72dev_backup_state.txt.

This statement does not work because the resulting line looks like

grep '"^nagios_retcode="' '"/var/lib/ibm72dev_backup_state.txt"'

On Linux it does work, but not on AIX. Where does the extra apostrophes
come from? And how to avoid it?

Thanks in advance for your help!

In the meantime we have solved the problem: :-)

grep_result=$(grep "^$2=" "$1")
[ -n "$grep_result" ]

Regards
Burkhard

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 07/19/2018 04:07 PM, Burkhard Schultheis wrote:

We have the following statement in a bash script running on AIX 7.2:

[ -n "$(grep \"^$2=\" \"$1\" 2>/dev/null)" ]

Just for the record: the \backslashes should be removed:
[ -n "$(grep "^$2=" "$1" 2>/dev/null)" ]

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)