`patch`

Use the output from diff et al. to update a file (GNU)

Syntax:

patch [option]... [origfile [patchfile]]

QNX Neutrino

Input options:

-p num --strip= num: Strip num leading components from file names.
-F lines --fuzz lines: Set the fuzz factor to lines for inexact matching.
-l --ignore-whitespace: Ignore white space changes between the patch and the input.
-c --context: Interpret the patch as a context difference.
-e --ed: Interpret the patch as an ed script.
-n --normal: Interpret the patch as a normal difference.
-u --unified: Interpret the patch as a unified difference.
-N --forward: Ignore patches that appear to be reversed or already applied.
-R --reverse: Assume patches were created with old and new files swapped.
-i patchfile --input=patchfile: Read the patch from patchfile instead of stdin.

Output options:

-o file --output=file: Output the patched files to file.
-r file --reject-file=file: Output rejects to file.
-D name --ifdef=name: Make merged if-then-else output using name.
-E --remove-empty-files: Remove output files that are empty after patching.
-Z --set-utc: Set the times of patched files, assuming diff uses UTC (GMT).
-T --set-time: Likewise, assuming local time.
--quoting-style=word: Output file names using quoting style word. The values for word are: literal, shell, shell-always, c, and escape. The default is taken from the QUOTING_STYLE environment variable; if this variable isn't set, patch uses shell.

Backup and version control options:

-b --backup: Back up the original contents of each file.
--backup-if-mismatch: Back up if the patch doesn't match exactly.
--no-backup-if-mismatch: Back up mismatches only if otherwise requested.
-V style --version-control=style: Use style version control, where style is simple, numbered, or existing.
-B prefix --prefix=prefix: Prepend prefix to the names of backup files.
-Y prefix --basename-prefix=prefix: Prepend prefix to the base names of backup files.
-z suffix --suffix=suffix: Append suffix to the names of backup files.
-g num --get=num: Get files from RCS etc., if num is positive; ask if it's negative.

Miscellaneous options:

-t --batch: Ask no questions; skip bad-Prereq patches; assume reversed.
-f --force: Like -t, but ignore bad-Prereq patches, and assume unreversed.
-s --quiet --silent: Work silently unless an error occurs.
--verbose: Output extra information about the work being done.
--dry-run: Don't actually change any files; just print what would happen.
--posix: Conform to the POSIX standard.
-d dir --directory=dir: Change the working directory to dir first.
--binary: Read and write data in binary mode (no effect on this platform).
-v --version: Output version info.
--help: Display some help.

The patch utility use the output from diff, diff3, and cmp to update a file.

QUOTING_STYLE: The default quoting style. The possible values are: literal, shell, shell-always, c, and escape. If QUOTING_STYLE isn't set, patch uses shell. You can override this variable by using the --quoting-style option.

GNU