According to salih k on 1/20/2010 5:55 AM: > Hi, > Well ,I have three queries now,
[please trim your replies down to relevant portions you are replying to - we don't need to read the same text over and over again] > > 1.I am waiting for answer whether I can use if [ $? -eq 1 -o $? > -eq 2 -o $? -eq 3 ]!!! as only these values are meaningful if we > are checking for alphanumic cases(?) NO. We have REPEATEDLY told you that checking $? -eq 3 is NOT a portable way to check for failure. GNU coreutils' expr can fail with a status > 128 if it was terminated by a signal. Therefore, checking merely against status 3 is insufficient to catch the case of all possible statuses larger than 2. > Debug msg4.new1 File has expr pstat 51198 int_num is 28 And you've already posted that, but without any strace proof that your system or shell is not the culprit. > 3.As you suggested(thanks)"check what arguments for exit() expr is giving" > > =Frankly i dont know how to check the same I will be thankful if you please > let me know the way to check the same If you are on a Linux system, then 'strace expr $int_num + 1' will give you a (very verbose) dump of every system call, including which value exit() was called with. In all likelihood, it will have been exit(0), in which case, if $? is corrupted, it is a bug in your shell and not in expr. -- Don't work too hard, make some time for fun as well! Eric Blake e...@byu.net
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