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checkbashisms(1)


NAME

   checkbashisms - check for bashisms in /bin/sh scripts

SYNOPSIS

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

DESCRIPTION

   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.

OPTIONS

   --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.

EXIT VALUES

   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.

   4      No bashisms were detected in a bash script.

SEE ALSO

   lintian(1)

AUTHOR

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



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