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101 lines
2.9 KiB
101 lines
2.9 KiB
# common useful functions |
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w3m_safe() { |
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url="$1" |
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output=$(/opt/homebrew/bin/w3m "$url" -M -cols 400 -graph -dump 2>&1) |
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if echo "$output" | grep -q "Can't load"; then |
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return 2 |
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else |
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echo "$output" |
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return 0 |
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fi |
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} |
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# Returns: |
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# 0 = server reachable & remote command ran |
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# 1 = network/host-not-up-yet |
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# 2 = SSH auth failure (key needs passphrase / wrong key / agent locked) -> caller should abort |
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# 3 = host not found |
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is_server_up() { |
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local host err st err_lc |
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host=$1 |
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# return 3 if the host does not exist |
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host "$host" 2>&1 > /dev/null || return 3 |
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# Capture only stderr; do NOT use -q (it suppresses diagnostics we need to classify). |
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# Force English messages for stable matching. |
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err=$(LC_ALL=C /usr/bin/ssh \ |
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-o BatchMode=yes \ |
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-o PreferredAuthentications=publickey \ |
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-o PubkeyAuthentication=yes \ |
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-o PasswordAuthentication=no \ |
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-o KbdInteractiveAuthentication=no \ |
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-o NumberOfPasswordPrompts=0 \ |
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-o ConnectTimeout=10 \ |
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-o ServerAliveInterval=20 \ |
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-o ServerAliveCountMax=3 \ |
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-o ConnectionAttempts=1 \ |
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-o StrictHostKeyChecking=no \ |
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-o UserKnownHostsFile=/dev/null \ |
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-o LogLevel=ERROR \ |
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-n "$host" 'uname -n || hostname' 2>&1 >/dev/null) |
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st=$? |
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# Success |
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[ $st -eq 0 ] && return 0 |
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# ssh uses 255 for any error; distinguish by stderr text |
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err_lc=$(printf '%s' "$err" | tr '[:upper:]' '[:lower:]') |
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case $err_lc in |
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# Common auth/passphrase/agent problems |
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*"permission denied"*|\ |
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*"no supported authentication methods available"*|\ |
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*"publickey authentication failed"*|\ |
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*"too many authentication failures"*|\ |
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*"sign_and_send_pubkey: signing failed"*|\ |
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*"agent refused operation"*|\ |
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*"agent admitted failure"*|\ |
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*"bad permissions"*|\ |
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*"enter passphrase"*) |
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printf 'FATAL: SSH authentication failed for "%s": %s\n' "$host" "$err" >&2 |
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return 2 |
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;; |
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esac |
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# Everything else looks like "not up yet" (timeout, DNS, connection refused/reset, kex read, etc.) |
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return 1 |
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} |
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wait_for_server_to_boot_up() { |
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local server rc |
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server=$1 |
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while :; do |
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is_server_up "$server" |
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rc=$? |
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case $rc in |
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0) |
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printf '"%s" is up and running.\n' "$server" |
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return 0 |
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;; |
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2) |
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printf 'Aborting: SSH authentication failed for "%s" (key needs passphrase / wrong key / agent locked).\n' "$server" >&2 |
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return 2 |
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;; |
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3) |
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printf 'Aborting: Host not found.\n' "$server" >&2 |
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return 3 |
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;; |
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*) |
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printf 'Server "%s" is not up\n' "$server" |
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sleep 10 |
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;; |
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esac |
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done |
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} |
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# vim: set ts=4 sw=4 tw=0 noet ft=sh:
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