break while [...] loop when a program finishes

throughthegreens · 02-17-2010, 02:48 PM

I would like to start a program, then start a while loop that stops when the started program finishes, in bash. I thought I could run

Code:

 (program ; stat=1) & 
     while [ $stat -eq 0 ]; ... done

in a bash script

acid_kewpie · 02-17-2010, 03:25 PM

Code:

myprogram &
MYPID=$!
while [ -f /proc/$MYPID ]
do
  ...
done

throughthegreens · 02-17-2010, 05:36 PM

thanks

Valery Reznic · 02-18-2010, 02:22 AM

Quote:

Originally Posted by acid_kewpie

Code:

myprogram &
MYPID=$!
while [ -f /proc/$MYPID ]
do
  ...
done

/proc/$MYPID is directory, so it should be '-d' instead of '-f'

Code:

while [ -d /proc/$MYPID ]

Another option is to use 'kill -0 $MYPID'

acid_kewpie · 02-18-2010, 04:01 AM

Duh, actually I was wondering if my logic was even worse as it's procfs not a real filesystem, so presumably -f would never work even on files in there.

Valery Reznic · 02-18-2010, 04:39 AM

Quote:

Originally Posted by acid_kewpie

Duh, actually I was wondering if my logic was even worse as it's procfs not a real filesystem, so presumably -f would never work even on files in there.

I tried and it's looks like -f and -d work as they should on procfs too.

throughthegreens · 02-18-2010, 11:12 AM

i used -e