Apply the patches specified in patchfile to original. Replace the original with the new, patched version; move the original to original.orig or original˜. The patch file is a difference listing produced by the diff command.
Back up the original file.
Prepend prefix to the backup filename.
When not backing up all original files, these options control whether a backup should be made when a patch does not match the original file. The default is to make backups unless --posix is specified.
Interpret patchfile as a context diff.
cd to directory dir before beginning patch operations.
Mark all changes with:
#ifdef string #endif
Print results of applying a patch, but don’t change any files.
Treat the contents of patchfile as ed commands.
If patch creates any empty files, delete them.
Force all changes, even those that look incorrect. Skip patches if the original file does not exist; force patches for files with the wrong version specified; assume patches are never reversed.
Specify the maximum number of lines that may be ignored (fuzzed over) when deciding where to install a hunk of code. The default is 2. Meaningful only with context diffs.
Specify whether to check the original file out of source control if it ...