NAME
    sdiff - find differences between two files and merge interactively

SYNOPSIS
    sdiff -o outfile [options] from-file to-file

DESCRIPTION
    The sdiff command merges two  files and interactively outputs the
    results to outfile.

    If from-file is a directory and to-file is not, sdiff compares the file
    in from-file whose file name is that of to-file, and vice versa.  from-
    file and to-file may not both be directories.

    sdiff options begin with -, so normally from-file and to-file may not
    begin with -. However, -- as an argument by itself treats the remain-
    ing arguments as file names even if they begin with -. You may not use
    - as an input file.

    sdiff without -o (or --output) produces a side-by-side difference.
    This usage is obsolete; use diff --side-by-side instead.

 Options
    Below is a summary of all of the options that GNU sdiff accepts.  Each
    option has two equivalent names, one of which is a single letter pre-
    ceded by -, and the other of which is a long name preceded by --. Mul-
    tiple single letter options (unless they take an argument) can be com-
    bined into a single command line argument. Long named options can be
    abbreviated to any unique prefix of their name.

    -a   Treat all files as text and compare them line-by-line, even if
    they do not appear to be text.

    -b   Ignore changes in amount of white space.

    -B   Ignore changes that just insert or delete blank lines.

    -d   Change the algorithm to perhaps find a smaller set of changes.
    This makes sdiff slower (sometimes much slower).

    -H   Use heuristics to speed handling of large files that have numer-
    ous scattered small changes.

    --expand-tabs
    Expand tabs to spaces in the output, to preserve the alignment
    of tabs in the input files.

    -i   Ignore changes in case; consider upper- and lower-case to be the
    same.

    -I regexp
    Ignore changes that just insert or delete lines that match reg-
    exp.

    --ignore-all-space
    Ignore white space when comparing lines.

    --ignore-blank-lines
    Ignore changes that just insert or delete blank lines.

    --ignore-case
    Ignore changes in case; consider upper- and lower-case to be the
    same.

    --ignore-matching-lines=regexp
    Ignore changes that just insert or delete lines that match reg-
    exp.

    --ignore-space-change
    Ignore changes in amount of white space.

    -l
    --left-column
    Print only the left column of two common lines.

    --minimal
    Change the algorithm to perhaps find a smaller set of changes.
    This makes sdiff slower (sometimes much slower).

    -o file
    --output=file
    Put merged output into file. This option is required for  merg-
    ing.

    -s
    --suppress-common-lines
    Do not print common lines.

    --speed-large-files
    Use heuristics to speed handling of large files that have numer-
    ous scattered small changes.

    -t   Expand tabs to spaces in the output, to preserve the alignment
    of tabs in the input files.

    --text Treat all files as text and compare them line-by-line, even if
    they do not appear to be text.

    -v
    --version
    Output the version number of sdiff.

    -w columns
    --width=columns
    Use an output width of columns. Note that for historical rea-
    sons, this option is -W in diff, -w in sdiff.

    -W   Ignore horizontal white space when comparing lines. Note that
    for historical reasons, this option is -w in diff, -W in sdiff.

SEE ALSO
   cmp(1),comm(1),diff(1),diff3(1).

DIAGNOSTICS
    An exit status of 0 means no differences were found, 1 means some dif-
    ferences were found, and 2 means trouble.