onintr

onintr

 

label

 

onintr -

 

onintr

"On interrupt." Used in shell scripts to handle interrupt signals (similar to the Bourne shell's trap 2 and trap "" 2 commands). The first form is like a goto label . The script will branch to label : if it catches an interrupt signal (e.g., CTRL-C). The second form lets the script ignore interrupts. This is useful at the beginning of a script or before any code segment that needs to run unhindered (e.g., when moving files). The third form restores interrupt handling that was previously disabled with onintr - .

Example

onintr cleanup     # go to "cleanup" on interrupt  .  .                 # shell script commands  . cleanup:           # label for interrupts   onintr -         # ignore additional interrupts   rm -f $tmpfiles  # remove any files created   exit 2           # exit with an error status