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Is it possible to insert the following code ( a timer ) in the dialog progress bar ?

date1=`date +%s`; 
   while true; do 
   echo -ne "$(date -u --date @$((`date +%s` - $date1)) +%H:%M:%S)\r"; 
  done

...

  dialog --title "File upgrade" --gauge "Please wait..." 10 70 0

My goal is to view the timer clock in the progress bar window. The clock should stop when the progress bar ended.

2

I would avoid any arithmetic operation, and use --gauge as documented ("new percentages are read from standard input"):

for ((i=0;i<=100;i+=10)); do echo $i; sleep 1; done | dialog --gauge "Please wait 10 seconds." 0 0
  • {, } => do, done ? – PSkocik Sep 16 '15 at 9:43
  • You can use both syntaxes in Bash, but this one allows to specify the increment. – pedroapero Sep 16 '15 at 10:11
  • Maybe you can :D. I would love to use the curly brace syntax but bash 4.3.11 won't allow me to. Neither will ksh, csh or dash. Zsh will. Aren't you on zsh? – PSkocik Sep 16 '15 at 10:25
  • 1
    You're totally right, I've tested it using zsh. I use the curly braces in scripts, but it seems it doesn't work on a single line... I've updated the answer accordingly. – pedroapero Sep 16 '15 at 11:46

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