On Mon, Feb 09, 2004 at 12:49:28PM +0100, Tomasz Zielonka wrote: > On Sun, Feb 08, 2004 at 09:36:16PM +0100, Volker Wysk wrote: > > Error Handling > > Error handling is one thing which is done much more thoroughly in > > HsUnix than in shells. Failed programs won't be silently ignored. > > Dynamic exceptions are used for error handling. Non zero exit codes > > are thrown as exceptions. > > Most sh derivaties have -e set option, which causes the shell to (taken > from FreeBSD sh man page): > > -e errexit > Exit immediately if any untested command fails in non-interactive > mode.
It doesn't work. #!/bin/sh -e cat nosuchfile | echo hello This script will exit with status 0 (success). If you think about how traditional unix shells are implemented, you will see that they can't get this right. (Which proves the non-existence of reliable non-trivial shell scripts!) I have my own half-finished shell-in-Haskell that handles this. I would be interested to know whether HsUnix does. Andrew _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell