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cowsayeternal: Improve logging and printing

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Salt 2018-12-31 13:59:48 -06:00
parent b0ddc8ebaf
commit 847e09e119
1 changed files with 9 additions and 1 deletions
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10
cowsayeternal
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@ -1,16 +1,24 @@
#!/bin/bash #!/bin/bash
cowsaidfile="$(mktemp)" cowsaidfile="$(mktemp)"
printf "Writing cows to temporary file \"%s\"\\n" \
"$cowsaidfile"
cowsay "E T E R N A L" > "$cowsaidfile" cowsay "E T E R N A L" > "$cowsaidfile"
trap_exit() { trap_exit() {
printf "\\n"
cat "$cowsaidfile" cat "$cowsaidfile"
rm "$cowsaidfile" rm "$cowsaidfile"
} }
trap trap_exit EXIT trap trap_exit EXIT
iterations=1
while true; do while true; do
# Shut up shellcheck; that's the whole point. cowsay does a full read # Shut up shellcheck; that's the whole point. cowsay does a full read
# before it writes back to the file anyway. # before it writes back to the file anyway.
# shellcheck disable=2094 # shellcheck disable=2094
cowsay -n < "$cowsaidfile" 1<> "$cowsaidfile" cowsay -n < "$cowsaidfile" 1<> "$cowsaidfile"
printf "%s bytes of cowsay; hit Ctrl+C to dump them\\n" \ iterations=$(( iterations + 1 ))
# This line will only ever grow larger, so we don't need to clear it
# before overwriting it.
printf "\\r%s iterations, %s bytes of cowsay; hit Ctrl+C to dump them" \
"$iterations" \
"$(stat --printf="%s" "$cowsaidfile")" "$(stat --printf="%s" "$cowsaidfile")"
done done