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Top Forums Shell Programming and Scripting Awk+colpos+negative if for 20 values Post 302908430 by Don Cragun on Monday 7th of July 2014 09:17:09 PM
Old 07-07-2014
I see several things that are likely to fail, but I don't understand what you're trying to do so I don't know how to fix them. Here are a few things for you to consider:
  1. Shell variables are not expanded inside single quoted strings.
  2. Inside awk programs, awk variables don't need a $ unless you are trying to get data from the field in the current input line specified by the value that variable expands to.
  3. Anytime you have an expression starting with variable != value || variable != another_value, the evaluation of that expression is TRUE. Adding more || expression sequences to that expression will never change its value to FALSE.
  4. If an input line that you are processing with awk or grep is longer than LINE_MAX bytes, the results are undefined. You can get the value of LINE_MAX for your system by running the command: getconf LINE_MAX. If colpos != 228070 means that your input lines are 228,070 bytes or more in length, you will not be able to use awk or grep to process those files on some systems.
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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