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catch(TCL)


catch -- evaluate script and trap exceptional returns

Synopsis

catch script [varName]

Description

The catch command may be used to prevent errors from aborting command interpretation. catch calls the Tcl interpreter recursively to execute script, and always returns a TCL_OK code, regardless of any errors that might occur while executing script. The return value from catch is a decimal string giving the code returned by the Tcl interpreter after executing script. This will be 0 (TCL_OK) if there were no errors in script; otherwise it will have a non-zero value corresponding to one of the exceptional return codes (see tcl.h for the definitions of code values). If the varName argument is given, then it gives the name of a variable; catch will set the variable to the string returned from script (either a result or an error message).
02 June 2005
© 2005 The SCO Group, Inc. All rights reserved.
SCO OpenServer Release 6.0.0 - 02 June 2005