Verifying if the shell command executed or not?


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# 1  
Verifying if the shell command executed or not?

Hi,

I am working on a shell script that would verify if the mount command has executed or not. So , i have been doing this.


mount /dev/cdrom /mnt/cdrom

echo "$?"

if [ "$?" = "0" ]; then

echo " Mount succesful"

else

echo " Mount unsuccessful"

fi


I have the problem with the if stmt. It is displaying " Mount successful even when it hasn't"


for example

echo "$?" would give 32, instead of going else loop, it still enters the if block of the code.


Can somebody help me with this.?


--Sundeep
# 2  
Code:
mount /dev/cdrom /mnt/cdrom

echo "$?"          # echo previous command exit code (mount)   .... remove this line!       

if [ "$?" = "0" ]; # if previous command exit code (echo) equal 0 ....

You get the point..
# 3  
Thanks dude,


That was so stupid of me.

--Sunny
# 4  
As a stylistic aside, that's really better written as

Code:
if mount /dev/cdrom /mnt/cdrom; then
  echo " Mount succesful"
else
  echo " Mount unsuccessful ($?)"
fi

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