83 lines
2.5 KiB
Diff
83 lines
2.5 KiB
Diff
From ff0c0dc23fec33e339974e419c664d3bef39edc9 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <phil@nwl.cc>
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Date: Tue, 1 Aug 2023 16:56:42 +0200
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Subject: [PATCH] iptables-apply: Eliminate shellcheck warnings
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Actual warnings were only about use of '-a' in bracket expressions
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(replace by '&&' pipeline) and the immediate evaluation of the variable
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in trap command.
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The remaining changes silence info-level messages: missing quoting
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around variables, pointless '$' in arithmetic expressions, backticks
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instead of $(...), missing '-r' parameter when calling read and an
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awkward negated '-z' check.
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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(cherry picked from commit 9f98550d58a49fc95d529ebdc0173579d957b425)
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---
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iptables/iptables-apply | 16 ++++++++--------
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1 file changed, 8 insertions(+), 8 deletions(-)
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diff --git a/iptables/iptables-apply b/iptables/iptables-apply
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index 3a7df5e3cbc1f..c603fb2113ef3 100755
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--- a/iptables/iptables-apply
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+++ b/iptables/iptables-apply
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@@ -141,9 +141,9 @@ for opt in $OPTS; do
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;;
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(*)
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case "${OPT_STATE:-}" in
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- (SET_TIMEOUT) eval TIMEOUT=$opt;;
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+ (SET_TIMEOUT) eval TIMEOUT="$opt";;
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(SET_SAVEFILE)
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- eval SAVEFILE=$opt
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+ eval SAVEFILE="$opt"
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[ -z "$SAVEFILE" ] && SAVEFILE="$DEF_SAVEFILE"
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;;
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esac
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@@ -163,13 +163,13 @@ done
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# Validate parameters
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if [ "$TIMEOUT" -ge 0 ] 2>/dev/null; then
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- TIMEOUT=$(($TIMEOUT))
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+ TIMEOUT=$((TIMEOUT))
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else
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echo "Error: timeout must be a positive number" >&2
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exit 1
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fi
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-if [ -n "$SAVEFILE" -a -e "$SAVEFILE" -a ! -w "$SAVEFILE" ]; then
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+if [ -n "$SAVEFILE" ] && [ -e "$SAVEFILE" ] && [ ! -w "$SAVEFILE" ]; then
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echo "Error: savefile not writable: $SAVEFILE" >&2
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exit 8
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fi
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@@ -205,8 +205,8 @@ esac
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### Begin work
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# Store old iptables rules to temporary file
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-TMPFILE=`mktemp /tmp/$PROGNAME-XXXXXXXX`
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-trap "rm -f $TMPFILE" EXIT HUP INT QUIT ILL TRAP ABRT BUS \
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+TMPFILE=$(mktemp "/tmp/$PROGNAME-XXXXXXXX")
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+trap 'rm -f $TMPFILE' EXIT HUP INT QUIT ILL TRAP ABRT BUS \
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FPE USR1 SEGV USR2 PIPE ALRM TERM
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if ! "$SAVE" >"$TMPFILE"; then
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@@ -257,13 +257,13 @@ esac
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# Prompt user for confirmation
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echo -n "Can you establish NEW connections to the machine? (y/N) "
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-read -n1 -t "$TIMEOUT" ret 2>&1 || :
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+read -r -n1 -t "$TIMEOUT" ret 2>&1 || :
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case "${ret:-}" in
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(y*|Y*)
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# Success
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echo
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- if [ ! -z "$SAVEFILE" ]; then
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+ if [ -n "$SAVEFILE" ]; then
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# Write successfully applied rules to the savefile
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echo "Writing successfully applied rules to '$SAVEFILE'..."
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if ! "$SAVE" >"$SAVEFILE"; then
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--
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2.41.0
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