PX4-Autopilot/Tools/simulation/sitl_multiple_run.sh
Onur Özkan 0d18be5049
fix(scripts): replace hardcoded /bin/bash shebangs
Several helper scripts assumes bash is available at /bin/bash. That breaks on systems
such as NixOS, where bash is resolved from PATH instead of a fixed /bin location and
causes failures like `bad interpreter` during `make format`, e.g., on my host machine:

```sh
$ make format

/PX4-Autopilot/Tools/astyle/check_code_style.sh: /PX4-Autopilot/Tools/astyle/fix_code_style.sh: /bin/bash: bad interpreter: No such file or directory
```

This change switches these entrypoints to `#!/usr/bin/env bash` so they locate bash properly.

No functional changes intended.

Signed-off-by: Onur Özkan <work@onurozkan.dev>
2026-04-01 12:25:28 -08:00

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#!/usr/bin/env bash
# Run multiple instances of the 'px4' binary, without starting an external simulator.
# It assumes px4 is already built with the specified build target.
#
# Usage: ./Tools/simulation/sitl_multiple_run.sh [num_instances] [model] [build_target]
# Examples:
# ./Tools/simulation/sitl_multiple_run.sh 3 sihsim_quadx px4_sitl_sih
# ./Tools/simulation/sitl_multiple_run.sh 2 gazebo-classic_iris px4_sitl_default
# ./Tools/simulation/sitl_multiple_run.sh # defaults: 2 instances, gazebo-classic_iris, px4_sitl_default
sitl_num=${1:-2}
sim_model=${2:-gazebo-classic_iris}
build_target=${3:-px4_sitl_default}
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
src_path="$SCRIPT_DIR/../../"
build_path=${src_path}/build/${build_target}
echo "killing running instances"
pkill -x px4 || true
sleep 1
export PX4_SIM_MODEL=${sim_model}
n=0
while [ $n -lt $sitl_num ]; do
working_dir="$build_path/instance_$n"
[ ! -d "$working_dir" ] && mkdir -p "$working_dir"
pushd "$working_dir" &>/dev/null
echo "starting instance $n in $(pwd)"
$build_path/bin/px4 -i $n -d "$build_path/etc" >out.log 2>err.log &
popd &>/dev/null
n=$(($n + 1))
done