CODEWITHSUNDEEP
bash
Kroll
Kroll

Reputation: 679

Bash: how to write in file from a bash script both ${VAR} and values?

I need to write both variables like ${myvar} and their values.

This code makes no substitutes and writes text as is:

cat >${PROGNAME_APPDIR}/AppRun <<'EOF'
#!/bin/bash

HERE=$(dirname $(readlink -f "${0}"))
export LD_PRELOAD="${HERE}"/lib/exec_wrapper.so
export BIN_DIR="${HERE}${DIR}"
exec "${BIN_DIR}"/binary "$@"
EOF

When I change << 'EOF' to << EOF the code substitutes all. But I need substitute just value of ${DIR}.

How to make a mixed write without crazy coding?

Upvotes: 0

Views: 51

Answers (1)

Rogus
Rogus

Reputation: 770

You have to escape the $ sign, change $ to \$ so it is treated as a normal character:

cat >${PROGNAME_APPDIR}/AppRun <<EOF
#!/bin/bash                                                                                                                                                                                                                                        

HERE=\$(dirname \$(readlink -f "\${0}"))                                                                                                                                                                                                              
export LD_PRELOAD="\${HERE}"/lib/exec_wrapper.so                                                                                                                                                                                                    
export BIN_DIR="\${HERE}${DIR}"                                                                                                                                                                                                                
exec "\${BIN_DIR}"/binary "\$@"                                                                                                                                                                                                                   
EOF

Upvotes: 4

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