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Full Discussion: If condition
Top Forums Shell Programming and Scripting If condition Post 302275724 by kaushik02018 on Monday 12th of January 2009 02:35:54 AM
Old 01-12-2009
Bug
Quote:
Originally Posted by Panos1962
Actually this is a pipeline consisting of two components (mysqldump and gzip). The success of this pipeline depends in the success of the two programs; either mysqldump may fail or gzip (or both ofcourse). It's better to rewrite these lines as follows:

Code:
set -o pipefail
mysqldump -u $USER -p$PASS $DB | gzip -9>/home/backup1/today_sme-$DATE.sql.gz
if [ $? -ne 0 ]; then
    blabla
else
    blabla
fi

The pipefail bash option is controlling the exit status of a pipeline (read the manual pages for bash). Of course the two components must be written correctly from their authors (exiting with non zero exit statuses when failures occur).
I changes my script as follow

############################################################
#! /bin/sh
export PATH=$PATH:/opt/mysql/bin/
#echo $PATH
echo $LD_LIBRARY_PATH
USER="root"
PASS="XYZ"
DB="sme"
DATE=$(date +%d%b%y_%k.%M.%S)
#DATE=`date +%y-%d-%m'
set -o pipefail
mysqldump -u $USER -p$PASS $DB | gzip -9>/home/backup1/today_sme-$DATE.sql.gz;
if[$? -ne 0]; then
find /home/backup1/ -mtime +4 -exec rm -f {} \;
exit 0
else
echo "done"
exit 1
fi

#############################################################

but while executing it shows error

bck_script.sh: line 19: syntax error near unexpected token `then'
bck_script.sh: line 19: `if[$? -ne 0]; then '
 

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LEARN ABOUT DEBIAN

uget-gtk

UGET-GTK(1)							   User Commands						       UGET-GTK(1)

NAME

       uget-gtk - a download manager that uses gtk+2, and libcurl

SYNOPSIS

       uget-gtk [options] [URL]

DESCRIPTION

   Help Options:
       -?, --help
	      Show help options.

       --help-all
	      Show all help options.

       --help-gtk
	      Show GTK+ Options

   Application Options:
       --quiet
	      add download directly. Don't show dialog.

       --category-index=N
	      add download to Nth category. (default -1)

       --folder=FOLDER
	      placed download file in FOLDER.

       --filename=FILE
	      set download filename to FILE.

       --user=USER
	      set both ftp and http user to USER.

       --password=PASS
	      set both ftp and http password to PASS.

       --proxy-type=N
	      set proxy type to N. (0=Don't use)

       --proxy-host=HOST
	      set proxy host to HOST.

       --proxy-port=PORT
	      set proxy port to PORT.

       --proxy-user=USER
	      set USER as proxy username.

       --proxy-password=PASS
	      set PASS as proxy password.

       --http-user=USER
	      set http user to USER.

       --http-password=PASS
	      set http password to PASS.

       --http-referer=URL
	      include `Referer: URL' header in HTTP request.

       --http-cookie-data=STRING
	      load cookies from STRING.

       --http-cookie-file=FILE
	      load cookies from FILE.

       --http-post-data=STRING
	      use the POST method; send STRING as the data.

       --http-post-file=FILE
	      use the POST method; send contents of FILE

       --ftp-user=USER
	      set ftp user to USER.

       --ftp-password=PASS
	      set ftp password to PASS.

       --display=DISPLAY
	      X display to use

AUTHOR

       uget  was  written  by  Raymond	Huang  <plushuang  at  users.sourceforge.net>,and this manual page was originally written by Dennis Craven
       <dcraven@gmail.com>

uget-gtk 1.4.9							     July 2009							       UGET-GTK(1)
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