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raghavauppuluri13/connect-wifi.sh

Created October 14, 2025 00:35
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Revisions

  1. raghavauppuluri13 revised this gist Oct 14, 2025. 1 changed file with 3 additions and 3 deletions.
    6 changes: 3 additions & 3 deletions connect-wifi.sh
    View file
    Original file line number Diff line number Diff line change
    @@ -12,11 +12,11 @@ TRIES=10

    host_for() { printf "bracketbot-%s.local" "$1"; }

    ping_05s() {
    ping_01s() {
    local host="$1"
    # Linux: -W (ms) with iputils ping; macOS/FreeBSD: -W (ms) also works for recent versions.
    # Fallback to BSD-style: -t (ttl) + short sleep guard.
    if ping -c1 -W 500 "$host" >/dev/null 2>&1; then
    if ping -c1 -W 100 "$host" >/dev/null 2>&1; then
    return 0
    fi
    # Try BSD-ish variant if first failed quickly (option-wise)
    @@ -30,7 +30,7 @@ try=0
    while (( try < TRIES )); do
    host="$(host_for "$ID")"
    echo "[bbssh] Probing ${host} (attempt $((try+1))/$TRIES)..."
    if ping_05s "$host"; then
    if ping_01s "$host"; then
    echo "[bbssh] Host is up: $host"
    exec ssh "bracketbot@${host}" "$@"
    fi
  2. raghavauppuluri13 created this gist Oct 14, 2025.
    51 changes: 51 additions & 0 deletions connect-wifi.sh
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,51 @@
    #!/usr/bin/env bash
    # bbssh: try bracketbot-<ID>.local, auto-increment ID up to 10 tries, then ssh on success
    set -euo pipefail

    if [[ $# -lt 1 ]]; then
    echo "Usage: $0 <ID> [ssh-args...]" >&2
    exit 1
    fi

    ID="$1"; shift || true
    TRIES=10

    host_for() { printf "bracketbot-%s.local" "$1"; }

    ping_05s() {
    local host="$1"
    # Linux: -W (ms) with iputils ping; macOS/FreeBSD: -W (ms) also works for recent versions.
    # Fallback to BSD-style: -t (ttl) + short sleep guard.
    if ping -c1 -W 500 "$host" >/dev/null 2>&1; then
    return 0
    fi
    # Try BSD-ish variant if first failed quickly (option-wise)
    if ping -c1 -t 1 "$host" >/dev/null 2>&1; then
    return 0
    fi
    return 1
    }

    try=0
    while (( try < TRIES )); do
    host="$(host_for "$ID")"
    echo "[bbssh] Probing ${host} (attempt $((try+1))/$TRIES)..."
    if ping_05s "$host"; then
    echo "[bbssh] Host is up: $host"
    exec ssh "bracketbot@${host}" "$@"
    fi
    echo "[bbssh] No response within 0.5s. Incrementing ID."
    # Increment while preserving any leading zeros (e.g., 001 -> 002)
    if [[ "$ID" =~ ^0*[0-9]+$ ]]; then
    width=${#ID}
    num=$((10#$ID + 1))
    printf -v ID "%0${width}d" "$num"
    else
    # If not purely numeric, just append +1
    ID="${ID}1"
    fi
    ((try++))
    done

    echo "[bbssh] Gave up after $TRIES attempts." >&2
    exit 1