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  1. testfunc() {
  2.   i=1
  3.   while :; do
  4.     echo "processing part $i" 1>&2
  5.     if { LC_ALL=POSIX dd bs=1k count=1 2>&3 >&4; } 3>&1 | grep -qe '^0[+]0 '; then
  6.       break
  7.     fi
  8.     i=$(( i + 1 ))
  9.   done 4>&1
  10. }
  11.  
  12. echo "hello, world" | wc -c
  13. echo "hello, world" | testfunc | wc -c
Success #stdin #stdout #stderr 0s 4668KB
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stdin
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Standard input is empty
stdout
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13
13
stderr
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processing part 1
processing part 2
https://ideone.com/nZhohd
language:
Bash (bash 5.0.3)
created:
4 years ago
visibility:
public

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