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Full Discussion: While loop, input from find command
Top Forums UNIX for Dummies Questions & Answers While loop, input from find command Post 302913234 by Don Cragun on Thursday 14th of August 2014 04:49:52 PM
Old 08-14-2014
The current standard says:
Quote:
A subshell environment shall be created as a duplicate of the shell environment, except that signal traps that are not being ignored shall be set to the default action. Changes made to the subshell environment shall not affect the shell environment. Command substitution, commands that are grouped with parentheses, and asynchronous lists shall be executed in a subshell environment. Additionally, each command of a multi-command pipeline is in a subshell environment; as an extension, however, any or all commands in a pipeline may be executed in the current environment. All other commands shall be executed in the current shell environment.
So, variable assignments in a while loop in a pipeline are allowed, but not required, to be visible in the current shell execution environment after the pipeline terminates.

The last element of a pipeline is run in the current shell execution environment in ksh.
The last element of a pipeline is run in a subshell environment in bash.
On this point, both are OK according to the standard.
 

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LEARN ABOUT OSX

cr

cr(1)                                                         General Commands Manual                                                        cr(1)

NAME

       cr - converts text files between nix EOL and dos EOL

SYNOPSIS

       cr  - | +  <input file> <output file>

DESCRIPTION

       Text  files,  such  as tle files, that come from a dos source usualy have the ^M symbol at the end of every line. Cr converts files between
       the dos newline format and the normal *nix newline format by stripping the ^M to convert dos to *nix, using the '-' option, or adding ^M to
       a *nix file to create the proper dos file when the '+' option is used.

       Although this extra character is not often a problem, programs like seesat5, which are data driven will encounter parsing problems when the
       extra character is present. It is these problems that cr is intended to repair.

   Options
       - | +  One or the other of these options is required. The '-' option is used to remove ^M from all newlines found in the dos file. The  '+'
              option is used to add ^M to every newline found in a *nix file.

       input file
              Fully delineated path to the input file. As this program is used in the dos environment as well, standard input is not used.

       output file
              Fully delineated path to the output file. As this program is used in the dos environment as well, standart output is not used.

SEE ALSO

       seesat5(1), seesat5(7), SEESAT5.INI(5), tle(5)

BUGS

       Cr  is  not an inteligent program. It methodicaly replaces/removes the offending character when it finds it in the correct context. Newline
       sequences found in contexts other than 'newline' will be replaced/removed just like those found in the proper  context.  Passing  a  binary
       file through cr is not advised, for this reason. Send all inqueries to Dale Scheetz <dwarf@polaris.net>.

Debian Linux                                                        2 April 96                                                               cr(1)
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