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Full Discussion: How to increment date using "for loop" in format MMDDYY inside the shell script?
Top Forums Shell Programming and Scripting How to increment date using "for loop" in format MMDDYY inside the shell script? Post 302763125 by Corona688 on Tuesday 29th of January 2013 02:50:58 PM
Old 01-29-2013
If you have AIX you don't have a lot of options for date math. This snippet continues to come in handy:
Code:
for ((I=0; I<=50; I++))
do
        DATE=$(perl -e 'use POSIX qw(strftime);  print strftime "%Y/%m/%d\n", localtime(time()+($ARGV[0]*60*60*24));' -- -${I})
        echo "got date $DATE"
done

 

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LEARN ABOUT DEBIAN

gnulib-tool

GNULIB-TOOL(1)						      GNU Portability Library						    GNULIB-TOOL(1)

NAME

       gnulib-tool - program for authors or maintainers which want to import modules from gnulib into their packages.

SYNOPSIS

       gnulib-tool --list

       gnulib-tool --import [module1 ... moduleN]

       gnulib-tool --update

       gnulib-tool --create-testdir --dir=directory module1 ... moduleN

       gnulib-tool --create-megatestdir --dir=directory [module1 ... moduleN]

       gnulib-tool --test --dir=directory module1 ... moduleN

       gnulib-tool --megatest --dir=directory [module1 ... moduleN]

       gnulib-tool --extract-description module

       gnulib-tool --extract-filelist module

       gnulib-tool --extract-dependencies module

       gnulib-tool --extract-autoconf-snippet module

       gnulib-tool --extract-automake-snippet module

       gnulib-tool --extract-include-directive module

       gnulib-tool --extract-license module

       gnulib-tool --extract-maintainer module

       gnulib-tool --extract-tests-module module

DESCRIPTION

       The  GNU  portability  library  is  a  macro system and C declarations and definitions for commonly-used API elements and abstracted system
       behaviors. It can be used to improve portability and other functionality in your programs.

OPTIONS

       Operation modes:

       --list print the available module names.

       --import
	      import the given modules into the current package; if no modules are specified, update the current package from the current gnulib.

       --update
	      update the current package, restore files omitted from CVS.

       --create-testdir
	      create a scratch package with the given modules.

       --create-megatestdir
	      create a mega scratch package with the given modules one by one and all together.

       --test test the combination of the given modules (recommended to use CC="gcc -Wall" here).

       --megatest
	      test the given modules one by one and all together (recommended to use CC="gcc -Wall" here).

       --extract-description
	      extract the description.

       --extract-filelist
	      extract the list of files.

       --extract-dependencies
	      extract the dependencies.

       --extract-autoconf-snippet
	      extract the snippet for configure.ac.

       --extract-automake-snippet
	      extract the snippet for lib/Makefile.am.

       --extract-include-directive
	      extract the #include directive.

       --extract-license
	      report the license terms of the source files under lib/.

       --extract-maintainer
	      report the maintainer(s) inside gnulib.

       --extract-tests-module
	      report the unit test module, if it exists.

       Options:

       --dir=DIRECTORY
	      specify the target directory. For --import, this specifies where your configure.ac can be found. Defaults to current directory.

       --lib=LIBRARY
	      Specify the library name. Defaults to 'libgnu'.

       --source-base=DIRECTORY
	      Directory relative --dir where source code is placed (default "lib"), for --import.

       --m4-base=DIRECTORY
	      Directory relative --dir where *.m4 macros are placed (default "m4"), for --import.

       --tests-base=DIRECTORY
	      Directory relative --dir where unit tests are placed (default "tests"), for --import.

       --aux-dir=DIRECTORY
	      Directory relative --dir where auxiliary build tools are placed (default "build-aux").

       --with-tests
	      Include unit tests for the included modules.

       --avoid=MODULE
	      Avoid including the given MODULE. Useful if you have code that provides equivalent functionality. This option can be repeated.

       --lgpl Abort if modules aren't available under the LGPL. Also modify license template from GPL to LGPL.

       --libtool
	      Use libtool rules, for --import.

       --macro-prefix=PREFIX
	      Specify the prefix of the macros 'gl_EARLY' and 'gl_INIT'. Default is 'gl'.

       --no-changelog
	      don't update or create ChangeLog files.

       --dry-run
	      For --import, only print what would have been done.

       -s, --symbolic, --symlink
	      Make symbolic links instead of copying files.

       -h, --help
	      Show summary of options.

BUGS

       Report bugs to <bug-gnulib@gnu.org>.

SEE ALSO

       check-module(1).

AUTHOR

       gnulib was written by the Free Software Foundation and others (sources of various origins).

       This manual page was written by Daniel Baumann <daniel@debian.org>, for the Debian project (but may be used by others).

0.0.20060601							    2006-06-01							    GNULIB-TOOL(1)
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