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>.

DEBIAN                                          Debian Utilities                                CHECKBASHISMS(1)