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Full Discussion: Doing a tail in a script and then return back and continue script
Top Forums Shell Programming and Scripting Doing a tail in a script and then return back and continue script Post 302469027 by markdark on Thursday 4th of November 2010 12:39:18 PM
Old 11-04-2010
Doing a tail in a script and then return back and continue script
Hello all,

I am trying to do a tail in a script. But when I quit the tail my script quits also. This is not what I want. I am struggling to get this done.

PHP Code:
#!/bin/bash
 
askFile() {
  echo -n "Enter file: "
  read FILE
}
 
doTail() {
  tail -F "${1}"
}
 
askFile
doTail "${FILE}"
askFile
doTail "${FILE}" 
Above is just a simple example what I am trying to do. As you see I first ask for a file. Then I do a tail on this file. If you now quit the tail by entering CTRL+C the total script stops. But I want it to ask for a file again.

Does anyone know how to do this?

Thanks in advance for any help.

Mark
 

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LEARN ABOUT OPENDARWIN

tcl_allowexceptions

Tcl_AllowExceptions(3)					      Tcl Library Procedures					    Tcl_AllowExceptions(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_AllowExceptions - allow all exceptions in next script evaluation

SYNOPSIS

       #include <tcl.h>

       Tcl_AllowExceptions(interp)

ARGUMENTS

       Tcl_Interp   *interp	 (in)	   Interpreter in which script will be evaluated.
_________________________________________________________________

DESCRIPTION

       If  a  script is evaluated at top-level (i.e. no other scripts are pending evaluation when the script is invoked), and if the script termi-
       nates with a completion code other than TCL_OK, TCL_ERROR or TCL_RETURN, then Tcl normally converts this into a TCL_ERROR  return  with	an
       appropriate  message.  The particular script evaluation procedures of Tcl that act in the manner are Tcl_EvalObjEx, Tcl_EvalObjv, Tcl_Eval,
       Tcl_EvalEx, Tcl_GlobalEval, Tcl_GlobalEvalObj, Tcl_VarEval and Tcl_VarEvalVA.

       However, if Tcl_AllowExceptions is invoked immediately before calling one of those a procedures, then arbitrary completion codes  are  per-
       mitted from the script, and they are returned without modification.  This is useful in cases where the caller can deal with exceptions such
       as TCL_BREAK or TCL_CONTINUE in a meaningful way.

KEYWORDS

       continue, break, exception, interpreter

Tcl									7.4						    Tcl_AllowExceptions(3)
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