diff options
| -rwxr-xr-x | bin/show-dependencies | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/bin/show-dependencies b/bin/show-dependencies index b144936..e729f57 100755 --- a/bin/show-dependencies +++ b/bin/show-dependencies @@ -2,6 +2,8 @@ . "${0%/*}/../conf/default.conf" +# Create a lock file. + if [ $# -eq 0 ]; then broken="$( ls "${work_dir}/package-states" | \ @@ -11,7 +13,26 @@ if [ $# -eq 0 ]; then echo "${broken}" | \ sed 's|\(\.[^.]\+\)\{4\}$||' )" - exec "$0" ${broken} + "$0" ${broken} + exit $? +fi + +if ps ax | \ + grep -v grep | \ + grep -v "^\s*$$\s" | \ + grep -wF "$0$( + printf ' %s' "$@" + )"; then + + >&2 echo $$ + >&2 echo 'I was running already.' + exit +fi + +exec 9> "${work_dir}/${0##*/}.lock" +if ! flock -n 9; then + echo 'Cannot get lock.' + exit fi tmp_dir="$(mktemp -d)" @@ -197,3 +218,5 @@ for target_package in "$@"; do dot -Tpng -o "${output}" "${tmp_dir}/input" || continue done + +rm "${work_dir}/${0##*/}.lock" |