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Top Forums Shell Programming and Scripting Need Bash Scripting Assistances Post 302991458 by MadeInGermany on Friday 10th of February 2017 05:27:44 PM
Old 02-10-2017
A recursive function can be nested a given times.
Code:
#!/bin/bash
log_file="./file1.log"
LIST="a A b B c C d D e E f F g G h H i I j J k K l L m M n N o O p P q Q r R s S t T u U v V w W x X y Y z Z 0 1 2 3 4 5 6 7 8 9 ! £ $ % ^ & ( ) , . / ; ' # [ ] { } : @ ~ < > ?"
# disable globbing; needed because of the unquoted $LIST that contains special characters like "?"
set -f

# the number of digits
depth=26

do_digit(){
if [[ $((depth)) -eq 0 ]]
then
  printf "%s\n" "$1"
  printf "%s\n" "$1" >&3
  return
fi
((depth-=1))
local i
for i in $LIST
do
  do_digit "$1$i"
done
((depth+=1))
}

# open $log_file once with descriptor 3
# writes to &3 will go there
do_digit 3>"$log_file"


Last edited by MadeInGermany; 02-10-2017 at 06:39 PM..
This User Gave Thanks to MadeInGermany For This Post:
 

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Tcl_SetRecursionLimit(3)				      Tcl Library Procedures					  Tcl_SetRecursionLimit(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_SetRecursionLimit - set maximum allowable nesting depth in interpreter SYNOPSIS
#include <tcl.h> int Tcl_SetRecursionLimit(interp, depth) ARGUMENTS
Tcl_Interp *interp (in) Interpreter whose recursion limit is to be set. Must be greater than zero. int depth (in) New limit for nested calls to Tcl_Eval for interp. _________________________________________________________________ DESCRIPTION
At any given time Tcl enforces a limit on the number of recursive calls that may be active for Tcl_Eval and related procedures such as Tcl_GlobalEval. Any call to Tcl_Eval that exceeds this depth is aborted with an error. By default the recursion limit is 1000. Tcl_SetRecursionLimit may be used to change the maximum allowable nesting depth for an interpreter. The depth argument specifies a new limit for interp, and Tcl_SetRecursionLimit returns the old limit. To read out the old limit without modifying it, invoke Tcl_SetRecur- sionLimit with depth equal to 0. The Tcl_SetRecursionLimit only sets the size of the Tcl call stack: it cannot by itself prevent stack overflows on the C stack being used by the application. If your machine has a limit on the size of the C stack, you may get stack overflows before reaching the limit set by Tcl_SetRecursionLimit. If this happens, see if there is a mechanism in your system for increasing the maximum size of the C stack. KEYWORDS
nesting depth, recursion Tcl 7.0 Tcl_SetRecursionLimit(3)
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