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Add log rotation.

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This commit is contained in:
Peter Ajamian 2021-12-18 17:12:11 +13:00
parent c039add132
commit da2de96c9c
1 changed files with 23 additions and 1 deletions
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24
migrate2rocky/migrate2rocky.sh
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@ -55,6 +55,26 @@ fi
# Path to logfile # Path to logfile
logfile=/var/log/migrate2rocky.log logfile=/var/log/migrate2rocky.log
# Rotate old logs
numlogs=5
if [[ -e $logfile ]]; then
# Here we use mv before bin_check, so simply check the exit status to see if
# it worked.
if ! mv -f "$logfile" "$logfile.0"; then
printf '%s\n' "Unable to rotate logfiles, continuing without rotation." >&2
else
for ((i=numlogs;i>0;i--)); do
if [[ -e "$logfile.$((i-1))" ]]; then
if ! mv -f "$logfile.$((i-1))" "$logfile.$i"; then
printf '%s\n' \
"Unable to rotate logfiles, continuing without rotation."
break
fi
fi
done
fi
fi
# Send all output to the logfile as well as stdout. # Send all output to the logfile as well as stdout.
# After the following we get: # After the following we get:
# Output to 1 goes to stdout and the logfile. # Output to 1 goes to stdout and the logfile.
@ -62,7 +82,7 @@ logfile=/var/log/migrate2rocky.log
# Output to 3 just goes to stdout. # Output to 3 just goes to stdout.
# Output to 4 just goes to stderr. # Output to 4 just goes to stderr.
# Output to 5 just goes to the logfile. # Output to 5 just goes to the logfile.
truncate -s0 "$logfile"
# shellcheck disable=SC2094 # shellcheck disable=SC2094
exec \ exec \
3>&1 \ 3>&1 \
@ -106,6 +126,8 @@ errmsg () {
printf '%s%s%s' "$errcolor" "$msg" "$nocolor" >&4 printf '%s%s%s' "$errcolor" "$msg" "$nocolor" >&4
} }
infomsg 'migrate2rocky - Begin logging at %(%c)T.\n\n' -1
export LC_ALL=C.UTF-8 export LC_ALL=C.UTF-8
unset LANGUAGE unset LANGUAGE
shopt -s nullglob shopt -s nullglob