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       checkbashisms - check for bashisms in /bin/sh scripts


       checkbashisms script ...
       checkbashisms --help|--version


       checkbashisms,  based  on  one  of  the checks from the lintian system,
       performs basic  checks  on  /bin/sh  shell  scripts  for  the  possible
       presence  of  bashisms.  It takes the names of the shell scripts on the
       command line, and outputs warnings if possible bashisms are detected.

       Note that the definition of a bashism in this context  roughly  equates
       to  "a  shell  feature  that is not required to be supported by POSIX";
       this means that some issues flagged may  be  permitted  under  optional
       sections of POSIX, such as XSI or User Portability.

       In  cases  where  POSIX  and  Debian  Policy disagree, checkbashisms by
       default allows extensions permitted by  Policy  but  may  also  provide
       options for stricter checking.


       --help, -h
              Show a summary of options.

       --newline, -n
              Check  for  "echo  -n"  usage  (non POSIX but required by Debian
              Policy 10.4.)

       --posix, -p
              Check for  issues  which  are  non  POSIX  but  required  to  be
              supported by Debian Policy 10.4 (implies -n).

       --force, -f
              Force  each  script to be checked, even if it would normally not
              be (for instance, it has a bash or non POSIX  shell  shebang  or
              appears to be a shell wrapper).

       --extra, -x
              Highlight  lines which, whilst they do not contain bashisms, may
              be useful in determining whether a particular issue is  a  false
              positive  which  may  be  ignored.   For  example,  the  use  of
              "$BASH_ENV" may be preceded by checking whether "$BASH" is  set.

       --version, -v
              Show version and copyright information.


       The exit value will be 0 if no possible bashisms or other problems were
       detected.  Otherwise it will be the sum of the following error values:

       1      A possible bashism was detected.

       2      A file was skipped for some reason, for example, because it  was
              unreadable or not found.  The warning message will give details.




       checkbashisms was originally written as a shell script by  Yann  Dirson
       <>  and  rewritten  in Perl with many more features by
       Julian Gilbey <>.