How to exit a script with error ? Post: 302836439

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Top Forums Shell Programming and Scripting How to exit a script with error ? Post 302836439 by Salil Gupta on Wednesday 24th of July 2013 07:27:52 AM

07-24-2013

Registered User

How to exit a script with error ?

Hi,

I have a script ABC which calls another script XYZ. Function of XYZ is to ftp a file from one server to another.

code for ABC:

Code:

#!/bin/ksh
PATH=/usr/bin

home/user/xyz "$@"

exit $?
~

code for xyz:

Code:

#!/bin/ksh
HOSTNAME=$1
 SRCNAME=$2
  DSTNAME=$3

### This file holds the outget of the FTP commands for success checking
  FTPCHK=/tmp/ftpchk.$$
  #touch $FTPCHK
  echo "" > $FTPCHK

SRCFILE=$SRCNAME

DSTFILE=$DSTNAME


echo Source Host: $HOSTNAME
echo Source File Name: $SRCFILE
echo Destination File: $DSTFILE

echo `date` Beginning FTP download...
ftp -v ${HOSTNAME} <<EOF >>$FTPCHK 2>&1
 ascii
 nlist ${SRCFILE}
 get ${SRCFILE}  ${DSTFILE}
 quit
EOF

### Check for FTP errors
  CHK1=`grep -c "226 Transfer complete." $FTPCHK`
  CHK2=`grep -c "226 ASCII Transfer complete." $FTPCHK`
  CHK3=`grep -ic "226 transfer complete" $FTPCHK`
  CHK4=`grep -ic "226 File send OK." $FTPCHK`

  ### In NT, There should transmissions complete:
  ### One for the data transfer,
  ### One for the nlist

 if [ $CHK1 -eq 2 ] || [ $CHK2 -eq 2 ] || [ $CHK1 -eq 1 -a $CHK2 -eq 1 ] || [ $CHK3 -eq 2 ] || [ $CHK4 -eq 1 ]; then
    RC=0
    echo "OK: FTP Transmission Worked"
    echo '--------------------------------------------------------------'
    cat $FTPCHK
    echo '--------------------------------------------------------------'


  else
     RC=1
     echo "ERROR: FTP Transmission Failed"
     banner "ERROR"
     echo '--------------------------------------------------------------'
     cat $FTPCHK
     echo '--------------------------------------------------------------'
  fi

date
ls -al ${DSTFILE}

rm $FTPCHK

echo '---------------------------------------------------------------------'

exit $RC

In script XYZ, I am trying to ftp a file. So during ftp , whenever it shows that space is less than size of file, it should ftp the partial according to the available space and prompt a message about it and also prompt a message to outer script that inner script could not complete successfully. Hence resulting in the failure of outer script, due to partial ftp of file.

Also please post the comments about the each step of script to explain what is happening in that step. Thanks a lot in advance.

Salil Gupta

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echo

echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME

       echo - echo arguments to standard output

SYNOPSIS

       /usr/ucb/echo [-n] [argument]

DESCRIPTION

       echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.

       echo  is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
       ronment variables.

       For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:

	   o	  echo your current-working-directory's full pathname

	   o	  pipe the output through tr to translate the path's embedded slash-characters into space-characters

	   o	  pipe that output through wc -w for a count of the names in your path.

		    example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"

       See tr(1) and wc(1) for their functionality.

       The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be  invoked	if
       the  user  calls  echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
       characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the  black-slashed  escape  characters,	and  ksh's
       echo() also understands a as the audible bell character; however, these commands do not have an -n option.

OPTIONS

       -n    Do not add the NEWLINE to the output.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5)

NOTES

       The -n option is a transition aid for BSD applications, and may not be supported in future  releases.

SunOS 5.11							    3 Aug 1994								  echo(1B)

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