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CHECKBASHISMS(1)       DragonFly General Commands Manual      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>.

DEBIAN                         Debian Utilities               CHECKBASHISMS(1)