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Vérifier si le port est libre avant de faire une connection SSH

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This commit is contained in:
Hippolyte Chauvin 2023-05-05 20:10:39 +02:00
parent 84bb3604e1
commit 974a252058
1 changed files with 11 additions and 1 deletions
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10
bin/ssh-fwd
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@ -14,11 +14,17 @@ Usage: $(basename "$0") SSH_HOST LOCAL_PORT DISTANT_PORT [TARGET] [-- SSH_OPTION
EOF EOF
} }
# Show an error
function error { function error {
>&2 usage >&2 usage
exit "${1:-1}" exit "${1:-1}"
} }
# Check if TCP port number is free
port_is_free() {
! lsof -i -P -n | grep -q ':'"${1}"' (LISTEN)'
}
# Arguments # Arguments
while [[ -n $* ]]; do while [[ -n $* ]]; do
case "$1" in case "$1" in
@ -54,5 +60,9 @@ ssh_com=(
# Execution # Execution
set -x set -x
if port_is_free "${args[1]}"; then
"${ssh_com[@]}" "${ssh_com[@]}"
else
echo "Port is not free, skipping."
fi