#!/usr/bin/env zsh
doit() {
if [[ "$1" = "start" ]]; then
for loc in $(cat all-doc); do
if ! screen -list | grep -q My-$loc; then
screen -dmS My-$loc /home/Server -f /home/$loc.cfg
fi
done
elif [[ "$1" = "stop" ]]; then
for loc in $(cat all-doc); do
if screen -list | grep -q My-$loc; then
pkill -f My-$loc;
fi
done
else
echo "Option: ERROR..."
fi
}
nothing() {
if [[ "$1" = "start" ]]; then
echo "Option: 1"
elif [[ "$1" = "stop" ]]; then
echo "Option: 2"
else
echo "Option: 3"
fi
}
case "$2" in
start)
"$1" "$2";
;;
stop)
"$1" "$2";
;;
restart)
restart;
;;
*)
echo "Usage: $0 {doit|nothing} {start|stop|restart}"
exit 1
;;
esac
exit 0
Output:
./script.sh:34> case test (start)
./script.sh:34> case test (stop)
./script.sh:34> case test (restart)
./script.sh:34> case test (*)
./script.sh:45> echo 'Usage: ./script.sh {start|stop|restart}'
sage: ./script.sh {start|stop|restart}
./script.sh:46> exit 1
this script for start and stop and restart my servers.
If $2 not match with "start" "stop" "restart" in both function must call else but not work.
Ok question is why ./script.sh doit test did not call
else
echo "Option: ERROR..."
whats the sulotion ? Is there better way to do somthing for ./script.sh $1 $2 i mean $1 get function and $2 get start|stop|restart ?
I am facing an issue, I have to delete files from some folders given in Path.lst,
The entire script is working fine but when some wrong path is given in Path.lst the script does exits out of the loop and perform no operation on the next paths.
But the last line
echo -e "\n ENDING SCRIPT SUCCESSFULLY ON `date` " >> $LOG_FILE
gets executed because exit 1 is not working in this part
if [ ! -d $path ]
then
echo -e "\nERROR :$path IS INVALID." >> $LOG_FILE
echo -e "\nENDING SCRIPT WITH ERRORS ON `date`" >> $LOG_FILE
exit 1
---------------------------------------------------------------------------------------
THE SCRIPT IS LIKE :
echo -e "\nSTARTING SCRIPT ON `date`">> $LOG_FILE
if [ $1 -gt 0 ]
then
DAYS_BFOR="$1"
else
echo -e "\nERROR :Please pass a single positive integer to the script" >>$LOG_FILE
echo -e "\nENDING SCRIPT WITH ERRORS ON `date` " >> $LOG_FILE
exit
fi
cat Path.lis | sed 's|^PATH[0-9]*=||g' | while read path
do
if [ ! -d $path ]
then
echo -e "\nERROR :$path IS INVALID." >> $LOG_FILE
echo -e "\n ENDING SCRIPT WITH ERRORS ON `date` " >> $LOG_FILE
exit 1
else
echo -e "\nFILES DELETED FROM THE "$path" DIRECTORY --" >> $LOG_FILE
find $path -type f -mtime +$DAYS_BFOR -printf "%TY-%Tm-%Td %kKB %p\n" | column -t | sed "s|"$path"||g" >> $LOG_FILE 2>&1
file_count=`find $path -type f -mtime +$DAYS_BFOR | wc -l`
if [ $file_count -ge 1 ]
then
find $path -type f -mtime +$DAYS_BFOR | xargs rm 2>>$LOG_FILE 2>&1
fi
fi
done
echo Exit Status : $?
echo -e "\n ENDING SCRIPT SUCCESSFULLY ON `date`" >> $LOG_FILE
Please help and explain the reason as well.
If you only want the "ENDING SCRIPT SUCCESSFULLY" message to appear if files were successfully deleted, not if an invalid path was given you could just move the last two echo lines up to the end of the else statement like this:
else
echo -e "\nFILES DELETED FROM THE "$path" DIRECTORY --" >> $LOG_FILE
find $path -type f -mtime +$DAYS_BFOR -printf "%TY-%Tm-%Td %kKB %p\n" | column -t | sed "s|"$path"||g" >> $LOG_FILE 2>&1
file_count=`find $path -type f -mtime +$DAYS_BFOR | wc -l`
if [ $file_count -ge 1 ]
then
find $path -type f -mtime +$DAYS_BFOR | xargs rm 2>>$LOG_FILE 2>&1
fi
echo Exit Status : $?
echo -e "\n--------------------------- ENDING SCRIPT SUCCESSFULLY ON `date` ----------------------------------" >> $LOG_FILE
fi
done
If you want to just skip to the next item in the Path.lis file then just remove the exit statement from the first loop. That way it will continue to execute the script until all the lines in the file have been read, and just show an error if the current file is not a valid path.
Hi I am struggling to solve this simple program. I am not able to pass the value from the text file to the variable.
I am stuck at this: value=$( sed -n "${line}p" rpt1.txt|awk {$3}
O/P:
1.sh[15]: test: argument expected
CODE:
wc `find /arbor/custom/gur/fold1`|grep -vi "total"| tee rpt1.txt
total1=`wc -l rpt1.txt`
wc `find /arbor/custom/gur/fold2`|grep -vi "total"| tee rpt2.txt
total2=`wc -l rpt2.txt`
line=1
if [ $line -le $total1 ]
then
value=$( sed -n "${line}p" rpt1.txt|awk {$3} )
if [ $value -eq 512 ];
then
sed -n "${line}p" rpt1.txt|awk '{print $4}'| tee direc.txt
fi
line =$line+1
else
echo "loop over"
fi
Shouldn't there be a print in front of $3 in the suspect line?
Consider I have a file abcde.txt which may contain one or more lines of text. I want a script that will DELETE the file if it contains single line.
Something like, if 'wc -l abscde.txt' = 1 then rm abscde.txt
My system : Solaris
Here's a simple bash script:
#!/bin/bash
LINECOUNT=`wc -l abscde.txt | cut -f1 -d' '`
if [[ $LINECOUNT == 1 ]]; then
rm -f abscde.txt
fi
delifsingleline () {
if [ $(cat $1 | wc -l) = "1" ]
then
echo "Deleting $1"
echo "rm $1"
fi
}
Lightly tested on zsh. Should work on bash as well.
This is (mostly) just a reformat of Ben's answer:
wc -l $PATH | grep '^1 ' > /dev/null && rm -f $PATH
This question already has answers here:
How do I test if a variable is a number in Bash?
(40 answers)
Closed 1 year ago.
How do I check to see if a variable is a number, or contains a number, in UNIX shell?
if echo $var | egrep -q '^[0-9]+$'; then
# $var is a number
else
# $var is not a number
fi
Shell variables have no type, so the simplest way is to use the return type test command:
if [ $var -eq $var 2> /dev/null ]; then ...
(Or else parse it with a regexp)
No forks, no pipes. Pure POSIX shell:
case $var in
(*[!0-9]*|'') echo not a number;;
(*) echo a number;;
esac
(Assumes number := a string of digits). If you want to allow signed numbers with a single leading - or + as well, strip the optional sign like this:
case ${var#[-+]} in
(*[!0-9]*|'') echo not a number;;
(*) echo a number;;
esac
In either ksh93 or bash with the extglob option enabled:
if [[ $var == +([0-9]) ]]; then ...
Here's a version using only the features available in a bare-bones shell (ie it'd work in sh), and with one less process than using grep:
if expr "$var" : '[0-9][0-9]*$'>/dev/null; then
echo yes
else
echo no
fi
This checks that the $var represents only an integer; adjust the regexp to taste, and note that the expr regexp argument is implicitly anchored at the beginning.
This can be checked using regular expression.
###
echo $var|egrep '^[0-9]+$'
if [ $? -eq 0 ]; then
echo "$var is a number"
else
echo "$var is not a number"
fi
I'm kind of newbee on shell programming so I try to find out most easy and readable
It will just check the var is greater or same as 0
I think it's nice way to choose parameters... may be not what ever... :
if [ $var -ge 0 2>/dev/null ] ; then ...
INTEGER
if echo "$var" | egrep -q '^\-?[0-9]+$'; then
echo "$var is an integer"
else
echo "$var is not an integer"
fi
tests (with var=2 etc.):
2 is an integer
-2 is an integer
2.5 is not an integer
2b is not an integer
NUMBER
if echo "$var" | egrep -q '^\-?[0-9]*\.?[0-9]+$'; then
echo "$var is a number"
else
echo "$var is not a number"
fi
tests (with var=2 etc.):
2 is a number
-2 is a number
-2.6 is a number
-2.c6 is not a number
2. is not a number
2.0 is a number
if echo $var | egrep -q '^[0-9]+$'
Actually this does not work if var is multiline.
ie
var="123
qwer"
Especially if var comes from a file :
var=`cat var.txt`
This is the simplest :
if [ "$var" -eq "$var" ] 2> /dev/null
then echo yes
else echo no
fi
Here is the test without any regular expressions (tcsh code):
Create a file checknumber:
#! /usr/bin/env tcsh
if ( "$*" == "0" ) then
exit 0 # number
else
((echo "$*" | bc) > /tmp/tmp.txt) >& /dev/null
set tmp = `cat /tmp/tmp.txt`
rm -f /tmp/tmp/txt
if ( "$tmp" == "" || $tmp == 0 ) then
exit 1 # not a number
else
exit 0 # number
endif
endif
and run
chmod +x checknumber
Use
checknumber -3.45
and you'll got the result as errorlevel ($?).
You can optimise it easily.
( test ! -z "$num" && test "$num" -eq "$num" 2> /dev/null ) && {
# $num is a number
}
You can do that with simple test command.
$ test ab -eq 1 >/dev/null 2>&1
$ echo $?
2
$ test 21 -eq 1 >/dev/null 2>&1
$ echo $?
1
$ test 1 -eq 1 >/dev/null 2>&1
$ echo $?
0
So if the exit status is either 0 or 1 then it is a integer , but if the exis status is 2 then it is not a number.
a=123
if [ `echo $a | tr -d [:digit:] | wc -w` -eq 0 ]
then
echo numeric
else
echo ng
fi
numeric
a=12s3
if [ `echo $a | tr -d [:digit:] | wc -w` -eq 0 ]
then
echo numeric
else
echo ng
fi
ng
Taking the value from Command line and showing THE INPUT IS DECIMAL/NON-DECIMAL and NUMBER or not:
NUMBER=$1
IsDecimal=`echo "$NUMBER" | grep "\."`
if [ -n "$IsDecimal" ]
then
echo "$NUMBER is Decimal"
var1=`echo "$NUMBER" | cut -d"." -f1`
var2=`echo "$NUMBER" | cut -d"." -f2`
Digit1=`echo "$var1" | egrep '^-[0-9]+$'`
Digit2=`echo "$var1" | egrep '^[0-9]+$'`
Digit3=`echo "$var2" | egrep '^[0-9]+$'`
if [ -n "$Digit1" ] && [ -n "$Digit3" ]
then
echo "$NUMBER is a number"
elif [ -n "$Digit2" ] && [ -n "$Digit3" ]
then
echo "$NUMBER is a number"
else
echo "$NUMBER is not a number"
fi
else
echo "$NUMBER is not Decimal"
Digit1=`echo "$NUMBER" | egrep '^-[0-9]+$'`
Digit2=`echo "$NUMBER" | egrep '^[0-9]+$'`
if [ -n "$Digit1" ] || [ -n "$Digit2" ]; then
echo "$NUMBER is a number"
else
echo "$NUMBER is not a number"
fi
fi