| sleeping=true | |
| trap "echo got signal" USR1 | |
| for try in 1 2 3 4 5; do | |
| kill -USR1 $$ | |
| sleep 1 | |
| echo sent $try signal | |
| done & | |
| sleep 10 & | |
| while $sleeping; do | |
| trap | |
| if wait %%; then | |
| echo sleep completed | |
| sleeping=false | |
| elif [ $? == 127 ]; then | |
| echo no sleep tonite | |
| sleeping=false | |
| else | |
| echo sleep interrupted; | |
| fi | |
| done |