onfilech.sh (raw) (566B)
1 #!/usr/bin/env sh 2 # on file change 3 # description: when a file ($1) modified time is updated, perform $2.. 4 # dependencies: stat 5 # e.g.$ onfilech draft-plans.txt cp draft-plans.txt new-plans.txt 6 7 if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then 8 echo "Usage: onfilech FILE COMMAND..." 9 echo "" 10 echo "run COMMAND every time a change is made to FILE" 11 exit 12 fi 13 14 file=$1; shift 15 cmd=$* 16 17 while true; do 18 mod=$(stat "$file"); 19 while [ "$mod" != false ]; do 20 upd=$(stat "$file"); 21 if [ "$upd" != "$mod" ]; then 22 $cmd; echo update; mod=false; 23 fi; 24 sleep 3; 25 done; 26 done;