checkbashisms

CHECKBASHISMS(1)            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, per-
       forms 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 de-
       fault allows extensions permitted by Policy but may  also  provide  op-
       tions for stricter checking.

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

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

       --posix, -p
              Check for issues which are non POSIX but  required  to  be  sup-
              ported 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)