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script to check for existence of file (or else sleep for x time)

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Top Forums Shell Programming and Scripting script to check for existence of file (or else sleep for x time)
# 8  
Old 03-28-2011
Quote:
Originally Posted by pchang
Thanks for your quick reply.

After I removed the ']]' from the ARR syntax, I'm still getting the same error -

0403-057 Syntax error at line 29 : `(' is not expected.

See my code below:

Code:
# Setup working variables
source_directory="$1"
src_list_files="$2"
sleep_time=$3
 
while read source_file G
do
 
  # Insert all entries into an array.  If there's more than one that's not an error.
  ARR=( "${UPLD_DIR_BASE}${source_directory}/${source_file}"*[0-9]*.[dD][aA][tT]* )
 
  while [[ -z "${ARR[0]}" ]]
  do
     echo "No match for ${UPLD_DIR_BASE}${source_directory}/${source_file}*[0-9]*.[dD][aA][tT]*"
 
     # Sleep for x amount of time
     sleep $sleep_time
 
     ARR=( "${UPLD_DIR_BASE}${source_directory}/${source_file}"*[0-9]*.[dD][aA][tT]* )

  done
 
done < "${UPLDSH_DIR}/${src_list_files}"

Also I wasn't clear on my first posting, basically, script should check for existence of file(s) and if not there go to sleep for x mins.

After x mins, the script should terminate.

thanks for helping out a fellow Canadian/Torontonian. Smilie
you forgot the line setting up the UPLD_DIR_BASE

UPLD_DIR_BASE=/data/data2/staging
# 9  
Old 03-28-2011
sorry ctsgnb.

I didn't include the first few lines of the script since it's setting a bunch of environment variables.

Code:
#!/usr/bin/ksh

# Setup environment variables
. /data/informatica/ming/Scripts/EDW_ENV_PARM.sh

script is complaining about array syntax not the missing path.

thanks.
# 10  
Old 03-28-2011
You may have an old version of ksh that doesn't support the () array syntax... Try this for size:
Code:
set -A ARR "${UPLD_DIR_BASE}${source_directory}/${source_file}"*[0-9]*.[dD][aA][tT]*

# 11  
Old 03-28-2011
or a
Code:
set -- "${UPLD_DIR_BASE}${source_directory}/${source_file}"*[0-9]*.[dD][aA][tT]*

Code:
for i in $*
do
...
done

.... but ok some limitations may be encountered regarding the number of args
# 12  
Old 03-28-2011
This has the side-effect of destroying your commandline parameters. Which is okay since you saved all the ones you cared about already; but just so you know.

Also, you'd need to do if [ -f "$1" ], not if [ -f "${ARR[0]}" ]

---------- Post updated at 11:56 AM ---------- Previous update was at 11:52 AM ----------

Quote:
Originally Posted by ctsgnb
.... but ok some limitations may be encountered regarding the number of args
The same limitation may exist for arrays anyway. Since we're only checking if the first element exists it's probably immaterial.
# 13  
Old 03-28-2011
Try with this, This work in bash
Code:
while [[ ! -e "${ARR[0]}" ]]

# 14  
Old 03-28-2011
Excellent guys - it's working now:

Code:
set -A ARR "${UPLD_DIR_BASE}${source_directory}/${source_file}"*[0-9]*.[dD][aA][tT]*

I'm busy with other things right now so I will test out the script later.

I might need your help later on.

---------- Post updated at 04:43 PM ---------- Previous update was at 02:01 PM ----------

Quote:
Originally Posted by Corona688
This has the side-effect of destroying your commandline parameters. Which is okay since you saved all the ones you cared about already; but just so you know.

Also, you'd need to do if [ -f "$1" ], not if [ -f "${ARR[0]}" ]

---------- Post updated at 11:56 AM ---------- Previous update was at 11:52 AM ----------

The same limitation may exist for arrays anyway. Since we're only checking if the first element exists it's probably immaterial.
sorry - I don't get why I need to check for
Code:
if [ -f "$1" ] instead of if [ -f "${ARR[0]}"

what's $1? Don't I need to check if the array is empty?

Also if there are 2 sets of files "MF_FF_201011.dat" and "MF_FF_201012.dat", what will the array contain with this statement?

Code:
set -A ARR "${UPLD_DIR_BASE}${source_directory}/${source_file}"*[0-9]*.[dD][aA][tT]*

thanks.
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