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Top Forums Shell Programming and Scripting Bash assign string to variable Post 302493465 by ghostdog74 on Wednesday 2nd of February 2011 08:39:03 PM
Old 02-02-2011
Quote:
Originally Posted by Scrutinizer
let is an arithmetic assignment in ksh.
as well as bash. it's actually all right to use it.

---------- Post updated at 08:39 PM ---------- Previous update was at 08:35 PM ----------

Quote:
Originally Posted by lio123
Thanks ,it works
How can I check if the product id exist with this line
`grep "$id" invertory | cut -c6-10`
what kind of return is going to have if it is eof and it didnt find it
man test. you can find test options to check for null strings. Or you can try checking $?
 

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shift(1)                                                           User Commands                                                          shift(1)

NAME
shift - shell built-in function to traverse either a shell's argument list or a list of field-separated words SYNOPSIS
sh shift [n] csh shift [variable] ksh * shift [n] DESCRIPTION
sh The positional parameters from $n+1 ... are renamed $1 ... . If n is not given, it is assumed to be 1. csh The components of argv, or variable, if supplied, are shifted to the left, discarding the first component. It is an error for the variable not to be set or to have a null value. ksh The positional parameters from $n+1 $n+1 ... are renamed $1 ..., default n is 1. The parameter n can be any arithmetic expression that evaluates to a non-negative number less than or equal to $#. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 shift(1)
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