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Script to get last working date

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# 1  
Old 09-07-2015
Script to get last working date
Problem : we need a command that will give previous day date and previous day should be mon-fri only.
Example :if we are running a command on Monday , it will give Friday ‘s date not Sunday’s .
Few more restrictions :
  1. Command should be working in NM n/w.
  2. Hard coding of date should be avoided.
  3. Command will be running on NM and market holidays also .
  4. Avoid the use of sysin or other static file .

I created a .sh script. The code is given below.
Code:
  
 #!/bin/bsh
  
 if [ date '+%w' ==1 ]; then
    date -v -3d + '%Y/%m/%d'
 else
    date -v - 1d + '%Y/%m/%d'
 fi

When I execute this script I get the following error
Code:
 
 date: illegal option --v

Please could a unix expert provide some insights.
Last edited by rbatte1; 09-07-2015 at 12:35 PM.. Reason: code tags by vbe; Added LIST=1 tags to replace text list
# 2  
Old 09-07-2015
Hello Downsouth,

Welcome to forum, please use code tags for commands/inputs/codes which you use in your posts as per forum rules. Following may help you in same.
Code:
cat check_day.ksh
if [[ `date -d "1 day ago" +%A` == "Sunday" ]]
then
        PRE_VAL=`date -d "3 day ago"`
elif [[ `date -d "1 day ago" +%A` == "Saturday" ]]
then
        PRE_VAL=`date -d "2 day ago"`
else
        PRE_VAL=`date -d "1 day ago"`
fi
echo $PRE_VAL " is the previous day."

Here name of the script is check_day.ksh.
When I execute it on my system following is the output.
Code:
 ./check_day.ksh
Fri Sep 4 07:58:17 EDT 2015  is the previous day.

Thanks,
R. Singh
# 3  
Old 09-07-2015
Well, i suggest:
Code:
date -v
date: invalid option -- 'v'
Try 'date --help' for more information.

Meaning, remove that invalid option and try again.
# 4  
Old 09-07-2015
Hi Ravinder,

Thanks for the reply. I get the following error.

Code:
Syntax error '==' unexpected

# 5  
Old 09-07-2015
Hello Downsouth,

Could you please check your date's command version by doing date --version as suggestion I gave will be for GNU dates. Also please mention your os details too(you can hide your box name but can provide version details and os name etc).

Thanks,
R. Singh
# 6  
Old 09-07-2015
HP-UX cadaman B.11.31 U ia64

Code:
date --version returned
 date [-u]
 date [-a]

# 7  
Old 09-07-2015
I wonder if its not your shell syntax... It is maybe expecting != for a "Not equal" and = for equal ( or "matches" as you prefer...)
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