busybox

/* vi: set sw=4 ts=4:

 *

 * Apply a "universal" diff.

 * Adapted from toybox's patch implementation.

 *

 * Copyright 2007 Rob Landley <rob@landley.net>

 *

 * see http://www.opengroup.org/onlinepubs/009695399/utilities/patch.html

 * (But only does -u, because who still cares about "ed"?)

 *

 * TODO:

 * -b backup

 * -l treat all whitespace as a single space

 * -d chdir first

 * -D define wrap #ifdef and #ifndef around changes

 * -o outfile output here instead of in place

 * -r rejectfile write rejected hunks to this file

 * --dry-run (regression!)

 *

 * -f force (no questions asked)

 * -F fuzz (number, default 2)

 * [file] which file to patch

 */

​

//config:config PATCH

//config:   bool "patch"

//config:   default y

//config:   help

//config:     Apply a unified diff formatted patch.

​

//applet:IF_PATCH(APPLET(patch, BB_DIR_USR_BIN, BB_SUID_DROP))

​

//kbuild:lib-$(CONFIG_PATCH) += patch.o

​

//usage:#define patch_trivial_usage

//usage:       "[OPTIONS] [ORIGFILE [PATCHFILE]]"

//usage:#define patch_full_usage "\n\n"

//usage:    IF_LONG_OPTS(

//usage:       "    -p,--strip N        Strip N leading components from file names"

//usage:     "\n    -i,--input DIFF     Read DIFF instead of stdin"

//usage:     "\n    -R,--reverse        Reverse patch"

//usage:     "\n    -N,--forward        Ignore already applied patches"

/*usage:     "\n    --dry-run       Don't actually change files" - TODO */

//usage:     "\n    -E,--remove-empty-files Remove output files if they become empty"

//usage:    )

//usage:    IF_NOT_LONG_OPTS(

//usage:       "    -p N    Strip N leading components from file names"

//usage:     "\n    -i DIFF Read DIFF instead of stdin"

//usage:     "\n    -R  Reverse patch"

//usage:     "\n    -N  Ignore already applied patches"

//usage:     "\n    -E  Remove output files if they become empty"

//usage:    )

/* -u "interpret as unified diff" is supported but not documented: this info is not useful for --help */

/* -x "debug" is supported but does nothing */

//usage:

//usage:#define patch_example_usage

//usage:       "$ patch -p1 < example.diff\n"

//usage:       "$ patch -p0 -i example.diff"

​

#include "libbb.h"

​

​

// libbb candidate?