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Full Discussion: /usr/local/bin/expr function not working
Top Forums Shell Programming and Scripting /usr/local/bin/expr function not working Post 302607672 by sdosanjh on Thursday 15th of March 2012 05:00:34 AM
Old 03-15-2012
/usr/local/bin/expr function not working
Legends,

I am not able to set "expr" function in ksh script.
Below is the sample code i used, and output is as "Syntax error"
Please help me to come out of it.


Quote:
DATE1="`date -u +%Y`"
DATE2="`date -u +%m%d`"
CurrentDate="$DATE1$DATE2"
print "CurrentDate = $CurrentDate"
cutoffdate=`/usr/local/bin/expr $CurrentDate - 3`
print "cutoffdate = $cutoffdate"
cat /tmp/loadDSdata.tmpl|while read BASENAME
do
Len=`/usr/local/bin/expr length $BASENAME`
Len=`/usr/local/bin/expr $Len + 2`
Len2=`/usr/local/bin/expr $Len + 7`

print "Len = $Len"
print "Len2 = $Len2"

OUTPUT

Quote:
CurrentDate = 20120315
cutoffdate = 20120312
expr: syntax error
expr: syntax error
expr: syntax error
Len =
Len2 =
Last edited by sdosanjh; 03-15-2012 at 06:07 AM..
 

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LEARN ABOUT OPENSOLARIS

basename

basename(1)							   User Commands						       basename(1)

NAME

       basename, dirname - deliver portions of path names

SYNOPSIS

       /usr/bin/basename string [suffix]

       /usr/xpg4/bin/basename string [suffix]

       dirname string

DESCRIPTION

       The  basename  utility deletes any prefix ending in / and the suffix (if present in string) from string, and prints the result on the stan-
       dard output. It is normally used inside substitution marks (``) within shell procedures.

   /usr/bin
       The suffix is a pattern defined on the expr(1) manual page.

   /usr/xpg4/bin
       The suffix is a string with no special significance attached to	any of the characters it contains.

       The dirname utility delivers all but the last level of the path name in string.

EXAMPLES

       Example 1 Setting environment variables

       The following example, invoked with the argument /home/sms/personal/mail sets the environment variable NAME to the file named mail and  the
       environment variable MYMAILPATH to the string  /home/sms/personal:

	 example% NAME=`basename $HOME/personal/mail`
	 example% MYMAILPATH=`dirname $HOME/personal/mail`

       Example 2 Compiling a file and moving the output

       This  shell  procedure,	invoked  with  the argument /usr/src/bin/cat.c, compiles the named file and moves the output to cat in the current
       directory:

	 example% cc $1
	 example% mv a.out `basename $1 .c`

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables that affect  the execution of basename and  dirname:  LANG,  LC_ALL,
       LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0     Successful completion.

       >0    An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

   /usr/bin
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

   /usr/xpg4/bin
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWxcu4			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       expr(1), basename(3C), attributes(5), environ(5), standards(5)

SunOS 5.11							    18 Mar 1997 						       basename(1)
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