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  1. #!/bin/bash
  2.  
  3. # ideone boilerplate: run in temp dir 
  4. t=$(mktemp -d -t ideone.XXXXXXXX) || exit
  5. trap 'rm -rf "$t"' ERR EXIT
  6. cd "$t"
  7.  
  8. cat <<\: >input.txt
  9. there is a foo
  10. in your bar
  11. :
  12.  
  13. cat <<\: >test.txt
  14. <body>
  15.   <div>PLACE_HOLDER</div>
  16. </body>
  17. :
  18.  
  19. sed 's/\&/\\&/g
  20.      1s/^/s\&PLACE_HOLDER\&/
  21.      $!s/$/\\/
  22.      $s/$/\&/' input.txt
  23.  
  24. echo ----------
  25.  
  26. sed 's/\&/\\&/g 1s/^/s\&PLACE_HOLDER\&/ $!s/$/\\/ $s/$/\&/' input.txt | sed -f - test.txt
  27.  
Success #stdin #stdout #stderr 0.02s 5284KB
comments (?)
stdin
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Standard input is empty
stdout
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s&PLACE_HOLDER&there is a foo\
in your bar&
----------
<body>
  <div>PLACE_HOLDER</div>
</body>
stderr
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sed: -e expression #1, char 13: unknown option to `s'
https://ideone.com/5xxUgm
https://stackoverflow.com/questions/74917108/replace-string-with-file-content
language:
Bash (bash 5.0.3)
created:
6 hours ago
visibility:
public

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