927 lines
22 KiB
C
927 lines
22 KiB
C
/* $NetBSD: patch.c,v 1.24 2005/03/25 23:55:02 wiz Exp $ */
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/* patch - a program to apply diffs to original files
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*
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* Copyright 1986, Larry Wall
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following condition
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* is met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this condition and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: patch.c,v 1.24 2005/03/25 23:55:02 wiz Exp $");
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#endif /* not lint */
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#include "INTERN.h"
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#include "common.h"
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#include "EXTERN.h"
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#include "version.h"
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#include "util.h"
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#include "pch.h"
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#include "inp.h"
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#include "backupfile.h"
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#include <stdlib.h>
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#include <unistd.h>
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/* procedures */
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static void reinitialize_almost_everything(void);
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static char *nextarg(void);
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static int optcmp(const void *, const void *);
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static char decode_long_option(char *);
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static void get_some_switches(void);
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static LINENUM locate_hunk(LINENUM);
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static void abort_hunk(void);
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static void apply_hunk(LINENUM);
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static void init_output(char *);
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static void init_reject(char *);
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static void copy_till(LINENUM);
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static void spew_output(void);
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static void dump_line(LINENUM);
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static bool patch_match(LINENUM, LINENUM, LINENUM);
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static bool similar(const char *, const char *, size_t);
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int main(int, char *[]);
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/* TRUE if -E was specified on command line. */
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static int remove_empty_files = FALSE;
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/* TRUE if -R was specified on command line. */
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static int reverse_flag_specified = FALSE;
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/* Apply a set of diffs as appropriate. */
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int
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main(int argc, char *argv[])
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{
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LINENUM where = 0;
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LINENUM newwhere;
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LINENUM fuzz;
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LINENUM mymaxfuzz;
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int hunk = 0;
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int failed = 0;
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int failtotal = 0;
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int i;
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for (i = 0; i<MAXFILEC; i++)
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filearg[i] = NULL;
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myuid = getuid();
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check_only = FALSE;
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/* Cons up the names of the temporary files. */
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{
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/* Directory for temporary files. */
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const char *tmpdir;
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size_t tmpname_len;
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tmpdir = getenv ("TMPDIR");
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if (tmpdir == NULL) {
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tmpdir = "/tmp";
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}
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tmpname_len = strlen (tmpdir) + 20;
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TMPOUTNAME = xmalloc(tmpname_len);
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strlcpy(TMPOUTNAME, tmpdir, tmpname_len);
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strlcat(TMPOUTNAME, "/patchoXXXXXX", tmpname_len);
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if ((i = mkstemp(TMPOUTNAME)) < 0)
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pfatal("can't create %s", TMPOUTNAME);
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Close(i);
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TMPINNAME = xmalloc(tmpname_len);
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strlcpy(TMPINNAME, tmpdir, tmpname_len);
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strlcat(TMPINNAME, "/patchiXXXXXX", tmpname_len);
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if ((i = mkstemp(TMPINNAME)) < 0)
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pfatal("can't create %s", TMPINNAME);
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Close(i);
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TMPREJNAME = xmalloc(tmpname_len);
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strlcpy(TMPREJNAME, tmpdir, tmpname_len);
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strlcat(TMPREJNAME, "/patchrXXXXXX", tmpname_len);
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if ((i = mkstemp(TMPREJNAME)) < 0)
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pfatal("can't create %s", TMPREJNAME);
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Close(i);
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TMPPATNAME = xmalloc(tmpname_len);
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strlcpy(TMPPATNAME, tmpdir, tmpname_len);
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strlcat(TMPPATNAME, "/patchpXXXXXX", tmpname_len);
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if ((i = mkstemp(TMPPATNAME)) < 0)
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pfatal("can't create %s", TMPPATNAME);
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Close(i);
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}
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{
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char *v;
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v = getenv ("SIMPLE_BACKUP_SUFFIX");
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if (v)
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simple_backup_suffix = v;
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else
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simple_backup_suffix = ORIGEXT;
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#ifndef NODIR
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v = getenv ("VERSION_CONTROL");
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backup_type = get_version (v); /* OK to pass NULL. */
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#endif
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}
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/* parse switches */
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Argc = argc;
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Argv = argv;
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get_some_switches();
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/* make sure we clean up /tmp in case of disaster */
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set_signals(0);
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for (
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open_patch_file(filearg[1]);
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there_is_another_patch();
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reinitialize_almost_everything()
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) { /* for each patch in patch file */
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if (!skip_rest_of_patch && outname == NULL)
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outname = xstrdup(filearg[0]);
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/* for ed script just up and do it and exit */
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if (diff_type == ED_DIFF) {
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do_ed_script();
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continue;
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}
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/* initialize the patched file */
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if (!skip_rest_of_patch)
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init_output(TMPOUTNAME);
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/* initialize reject file */
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init_reject(TMPREJNAME);
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/* find out where all the lines are */
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if (!skip_rest_of_patch)
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scan_input(filearg[0]);
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/* from here on, open no standard i/o files, because malloc */
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/* might misfire and we can't catch it easily */
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/* apply each hunk of patch */
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hunk = 0;
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failed = 0;
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while (another_hunk()) {
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hunk++;
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fuzz = Nulline;
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mymaxfuzz = pch_context();
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if (maxfuzz < mymaxfuzz)
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mymaxfuzz = maxfuzz;
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if (!skip_rest_of_patch) {
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do {
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where = locate_hunk(fuzz);
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if (hunk == 1 && where == Nulline && !force) {
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/* dwim for reversed patch? */
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if (!pch_swap()) {
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if (fuzz == Nulline)
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say(
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"Not enough memory to try swapped hunk! Assuming unswapped.\n");
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continue;
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}
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reverse = !reverse;
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where = locate_hunk(fuzz); /* try again */
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if (where == Nulline) { /* didn't find it swapped */
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if (!pch_swap()) /* put it back to normal */
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fatal("lost hunk on alloc error!\n");
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reverse = !reverse;
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}
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else if (noreverse) {
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if (!pch_swap()) /* put it back to normal */
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fatal("lost hunk on alloc error!\n");
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reverse = !reverse;
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say(
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"Ignoring previously applied (or reversed) patch.\n");
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skip_rest_of_patch = TRUE;
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}
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else if (batch) {
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if (verbose)
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say(
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"%seversed (or previously applied) patch detected! %s -R.",
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reverse ? "R" : "Unr",
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reverse ? "Assuming" : "Ignoring");
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}
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else {
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ask(
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"%seversed (or previously applied) patch detected! %s -R? [y] ",
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reverse ? "R" : "Unr",
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reverse ? "Assume" : "Ignore");
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if (*buf == 'n') {
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ask("Apply anyway? [n] ");
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if (*buf != 'y')
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skip_rest_of_patch = TRUE;
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where = Nulline;
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reverse = !reverse;
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if (!pch_swap()) /* put it back to normal */
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fatal("lost hunk on alloc error!\n");
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}
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}
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}
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} while (!skip_rest_of_patch && where == Nulline &&
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++fuzz <= mymaxfuzz);
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if (skip_rest_of_patch) { /* just got decided */
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Fclose(ofp);
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ofp = NULL;
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}
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}
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newwhere = pch_newfirst() + last_offset;
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if (skip_rest_of_patch) {
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abort_hunk();
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failed++;
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if (verbose)
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say("Hunk #%d ignored at %d.\n", hunk, newwhere);
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}
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else if (where == Nulline) {
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abort_hunk();
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failed++;
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if (verbose)
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say("Hunk #%d failed at %d.\n", hunk, newwhere);
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}
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else {
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apply_hunk(where);
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if (verbose) {
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say("Hunk #%d succeeded at %d", hunk, newwhere);
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if (fuzz)
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say(" with fuzz %d", fuzz);
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if (last_offset)
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say(" (offset %d line%s)",
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last_offset, last_offset==1?"":"s");
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say(".\n");
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}
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}
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}
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assert(hunk);
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/* finish spewing out the new file */
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if (!skip_rest_of_patch)
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spew_output();
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/* and put the output where desired */
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ignore_signals();
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if (!skip_rest_of_patch) {
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struct stat statbuf;
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char *realout = outname;
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if (move_file(TMPOUTNAME, outname) < 0) {
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toutkeep = TRUE;
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realout = TMPOUTNAME;
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chmod(TMPOUTNAME, filemode);
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}
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else
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chmod(outname, filemode);
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if (remove_empty_files && stat(realout, &statbuf) == 0
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&& statbuf.st_size == 0) {
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if (verbose)
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say("Removing %s (empty after patching).\n", realout);
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while (unlink(realout) >= 0) ; /* while is for Eunice. */
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}
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}
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Fclose(rejfp);
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rejfp = NULL;
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if (failed) {
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failtotal += failed;
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if (outname != NULL) {
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if (!*rejname) {
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strlcpy(rejname, outname, sizeof(rejname));
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strlcat(rejname, REJEXT, sizeof(rejname));
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}
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if (skip_rest_of_patch)
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say("%d out of %d hunks ignored"
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"--saving rejects to %s\n",
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failed, hunk, rejname);
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else
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say("%d out of %d hunks failed"
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"--saving rejects to %s\n",
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failed, hunk, rejname);
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if (move_file(TMPREJNAME, rejname) < 0)
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trejkeep = TRUE;
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} else
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say("%d out of %d hunks ignored\n", failed, hunk);
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}
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set_signals(1);
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}
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my_exit(failtotal);
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/* NOTREACHED */
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}
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/* Prepare to find the next patch to do in the patch file. */
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static void
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reinitialize_almost_everything(void)
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{
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re_patch();
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re_input();
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input_lines = 0;
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last_frozen_line = 0;
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filec = 0;
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if (filearg[0] != NULL) {
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free(filearg[0]);
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filearg[0] = NULL;
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}
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if (outname != NULL) {
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free(outname);
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outname = NULL;
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}
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last_offset = 0;
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diff_type = 0;
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if (revision != NULL) {
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free(revision);
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revision = NULL;
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}
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reverse = reverse_flag_specified;
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skip_rest_of_patch = FALSE;
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get_some_switches();
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if (filec >= 2)
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fatal("you may not change to a different patch file\n");
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}
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static char *
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nextarg(void)
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{
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if (!--Argc)
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fatal("missing argument after `%s'\n", *Argv);
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return *++Argv;
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}
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/* Module for handling of long options. */
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struct option {
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const char *long_opt;
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char short_opt;
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};
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static int
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optcmp(const void *va, const void *vb)
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{
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const struct option *a = va, *b = vb;
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return strcmp (a->long_opt, b->long_opt);
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}
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/* Decode Long options beginning with "--" to their short equivalents. */
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static char
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decode_long_option(char *opt)
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{
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/*
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* This table must be sorted on the first field. We also decode
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* unimplemented options as those will probably be dealt with
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* later, anyhow.
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*/
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static struct option options[] = {
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{ "batch", 't' },
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{ "context", 'c' },
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{ "debug", 'x' },
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{ "directory", 'd' },
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{ "dry-run", 'C' },
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{ "ed", 'e' },
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{ "force", 'f' },
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{ "forward", 'N' },
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{ "fuzz", 'F' },
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{ "ifdef", 'D' },
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{ "ignore-whitespace", 'l' },
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{ "normal", 'n' },
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{ "output", 'o' },
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{ "patchfile", 'i' },
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{ "prefix", 'B' },
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{ "quiet", 's' },
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{ "reject-file", 'r' },
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{ "remove-empty-files", 'E' },
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{ "reverse", 'R' },
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{ "silent", 's' },
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{ "skip", 'S' },
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{ "strip", 'p' },
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{ "suffix", 'b' },
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{ "unified", 'u' },
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{ "version", 'v' },
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{ "version-control", 'V' },
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};
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struct option key, *found;
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key.long_opt = opt;
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found = bsearch(&key, options,
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sizeof(options) / sizeof(options[0]), sizeof(options[0]), optcmp);
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return found ? found->short_opt : '\0';
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}
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/* Process switches and filenames up to next '+' or end of list. */
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static void
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get_some_switches(void)
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{
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char *s;
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rejname[0] = '\0';
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if (!Argc)
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return;
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for (Argc--,Argv++; Argc; Argc--,Argv++) {
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s = Argv[0];
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if (strEQ(s, "+")) {
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return; /* + will be skipped by for loop */
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}
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if (*s != '-' || !s[1]) {
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if (filec == MAXFILEC)
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fatal("too many file arguments\n");
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if (filec == 1 && filearg[filec] != NULL)
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fatal("-i option and patchfile argument are mutually\
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exclusive\n");
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filearg[filec++] = xstrdup(s);
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}
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else {
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char opt;
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if (*(s + 1) == '-') {
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opt = decode_long_option(s + 2);
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s = "";
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}
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else
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opt = *++s;
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do {
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switch (opt) {
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case 'b':
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simple_backup_suffix = xstrdup(nextarg());
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break;
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case 'B':
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origprae = xstrdup(nextarg());
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break;
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case 'c':
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diff_type = CONTEXT_DIFF;
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break;
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case 'C':
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check_only = TRUE;
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break;
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case 'd':
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if (!*++s)
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s = nextarg();
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if (chdir(s) < 0)
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pfatal("can't cd to %s", s);
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s = "";
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break;
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case 'D':
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do_defines = TRUE;
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if (!*++s)
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s = nextarg();
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if (!isalpha((unsigned char)*s) && '_' != *s)
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fatal("argument to -D is not an identifier\n");
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snprintf(if_defined, sizeof(if_defined), "#ifdef %s\n", s);
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snprintf(not_defined, sizeof(not_defined), "#ifndef %s\n", s);
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snprintf(end_defined, sizeof(end_defined),
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"#endif /* %s */\n", s);
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s = "";
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break;
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case 'e':
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diff_type = ED_DIFF;
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break;
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case 'E':
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remove_empty_files = TRUE;
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break;
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case 'f':
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force = TRUE;
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break;
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|
case 'F':
|
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if (*++s == '=')
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s++;
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maxfuzz = atoi(s);
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s = "";
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break;
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|
case 'i':
|
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if (filearg[1] != NULL)
|
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free(filearg[1]);
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filearg[1] = xstrdup(nextarg());
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break;
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case 'l':
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canonicalize = TRUE;
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break;
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case 'n':
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diff_type = NORMAL_DIFF;
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break;
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case 'N':
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noreverse = TRUE;
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break;
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case 'o':
|
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outname = xstrdup(nextarg());
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break;
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case 'p':
|
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if (*++s == '=')
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s++;
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strippath = atoi(s);
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s = "";
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break;
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case 'r':
|
|
strlcpy(rejname, nextarg(), sizeof(rejname));
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break;
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case 'R':
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reverse = TRUE;
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|
reverse_flag_specified = TRUE;
|
|
break;
|
|
case 's':
|
|
verbose = FALSE;
|
|
break;
|
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case 'S':
|
|
skip_rest_of_patch = TRUE;
|
|
break;
|
|
case 't':
|
|
batch = TRUE;
|
|
break;
|
|
case 'u':
|
|
diff_type = UNI_DIFF;
|
|
break;
|
|
case 'v':
|
|
version();
|
|
break;
|
|
case 'V':
|
|
#ifndef NODIR
|
|
backup_type = get_version (nextarg ());
|
|
#endif
|
|
break;
|
|
#ifdef DEBUGGING
|
|
case 'x':
|
|
debug = atoi(s+1);
|
|
s = "";
|
|
break;
|
|
#endif
|
|
default:
|
|
fprintf(stderr, "patch: unrecognized option `%s'\n",
|
|
Argv[0]);
|
|
fprintf(stderr, "\
|
|
Usage: patch [options] [origfile [patchfile]] [+ [options] [origfile]]...\n\
|
|
Options:\n\
|
|
[-CcEeflNnRSstuv] [-B backup-prefix] [-b backup-ext] [-d directory]\n\
|
|
[-D symbol] [-Fmax-fuzz] [-o out-file] [-p[strip-count]]\n\
|
|
[-r rej-name] [-V {numbered,existing,simple}]\n");
|
|
my_exit(1);
|
|
}
|
|
opt = *s ? *++s : '\0';
|
|
} while (opt != '\0');
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Attempt to find the right place to apply this hunk of patch. */
|
|
|
|
static LINENUM
|
|
locate_hunk(LINENUM fuzz)
|
|
{
|
|
LINENUM first_guess = pch_first() + last_offset;
|
|
LINENUM offset;
|
|
LINENUM pat_lines = pch_ptrn_lines();
|
|
LINENUM max_pos_offset = input_lines - first_guess
|
|
- pat_lines + 1;
|
|
LINENUM max_neg_offset = first_guess - last_frozen_line - 1
|
|
+ pch_context();
|
|
|
|
if (!pat_lines) /* null range matches always */
|
|
return first_guess;
|
|
if (max_neg_offset >= first_guess) /* do not try lines < 0 */
|
|
max_neg_offset = first_guess - 1;
|
|
if (first_guess <= input_lines && patch_match(first_guess, Nulline, fuzz))
|
|
return first_guess;
|
|
for (offset = 1; ; offset++) {
|
|
bool check_after = (offset <= max_pos_offset);
|
|
bool check_before = (offset <= max_neg_offset);
|
|
|
|
if (check_after && patch_match(first_guess, offset, fuzz)) {
|
|
#ifdef DEBUGGING
|
|
if (debug & 1)
|
|
say("Offset changing from %d to %d\n", last_offset, offset);
|
|
#endif
|
|
last_offset = offset;
|
|
return first_guess+offset;
|
|
}
|
|
else if (check_before && patch_match(first_guess, -offset, fuzz)) {
|
|
#ifdef DEBUGGING
|
|
if (debug & 1)
|
|
say("Offset changing from %d to %d\n", last_offset, -offset);
|
|
#endif
|
|
last_offset = -offset;
|
|
return first_guess-offset;
|
|
}
|
|
else if (!check_before && !check_after)
|
|
return Nulline;
|
|
}
|
|
}
|
|
|
|
/* We did not find the pattern, dump out the hunk so they can handle it. */
|
|
|
|
static void
|
|
abort_hunk(void)
|
|
{
|
|
LINENUM i;
|
|
LINENUM pat_end = pch_end();
|
|
/* add in last_offset to guess the same as the previous successful hunk */
|
|
LINENUM oldfirst = pch_first() + last_offset;
|
|
LINENUM newfirst = pch_newfirst() + last_offset;
|
|
LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1;
|
|
LINENUM newlast = newfirst + pch_repl_lines() - 1;
|
|
const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : "");
|
|
const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----");
|
|
|
|
fprintf(rejfp, "***************\n");
|
|
for (i=0; i<=pat_end; i++) {
|
|
switch (pch_char(i)) {
|
|
case '*':
|
|
if (oldlast < oldfirst)
|
|
fprintf(rejfp, "*** 0%s\n", stars);
|
|
else if (oldlast == oldfirst)
|
|
fprintf(rejfp, "*** %d%s\n", oldfirst, stars);
|
|
else
|
|
fprintf(rejfp, "*** %d,%d%s\n", oldfirst, oldlast, stars);
|
|
break;
|
|
case '=':
|
|
if (newlast < newfirst)
|
|
fprintf(rejfp, "--- 0%s\n", minuses);
|
|
else if (newlast == newfirst)
|
|
fprintf(rejfp, "--- %d%s\n", newfirst, minuses);
|
|
else
|
|
fprintf(rejfp, "--- %d,%d%s\n", newfirst, newlast, minuses);
|
|
break;
|
|
case '\n':
|
|
fprintf(rejfp, "%s", pfetch(i));
|
|
break;
|
|
case ' ': case '-': case '+': case '!':
|
|
fprintf(rejfp, "%c %s", pch_char(i), pfetch(i));
|
|
break;
|
|
default:
|
|
fatal("fatal internal error in abort_hunk\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We found where to apply it (we hope), so do it. */
|
|
|
|
static void
|
|
apply_hunk(LINENUM where)
|
|
{
|
|
LINENUM old = 1;
|
|
LINENUM lastline = pch_ptrn_lines();
|
|
LINENUM new = lastline+1;
|
|
#define OUTSIDE 0
|
|
#define IN_IFNDEF 1
|
|
#define IN_IFDEF 2
|
|
#define IN_ELSE 3
|
|
int def_state = OUTSIDE;
|
|
bool R_do_defines = do_defines;
|
|
LINENUM pat_end = pch_end();
|
|
|
|
where--;
|
|
while (pch_char(new) == '=' || pch_char(new) == '\n')
|
|
new++;
|
|
|
|
while (old <= lastline) {
|
|
if (pch_char(old) == '-') {
|
|
copy_till(where + old - 1);
|
|
if (R_do_defines) {
|
|
if (def_state == OUTSIDE) {
|
|
fputs(not_defined, ofp);
|
|
def_state = IN_IFNDEF;
|
|
}
|
|
else if (def_state == IN_IFDEF) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
}
|
|
fputs(pfetch(old), ofp);
|
|
}
|
|
last_frozen_line++;
|
|
old++;
|
|
}
|
|
else if (new > pat_end) {
|
|
break;
|
|
}
|
|
else if (pch_char(new) == '+') {
|
|
copy_till(where + old - 1);
|
|
if (R_do_defines) {
|
|
if (def_state == IN_IFNDEF) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
}
|
|
else if (def_state == OUTSIDE) {
|
|
fputs(if_defined, ofp);
|
|
def_state = IN_IFDEF;
|
|
}
|
|
}
|
|
fputs(pfetch(new), ofp);
|
|
new++;
|
|
}
|
|
else if (pch_char(new) != pch_char(old)) {
|
|
say("Out-of-sync patch, lines %d,%d--mangled text or line numbers, maybe?\n",
|
|
pch_hunk_beg() + old,
|
|
pch_hunk_beg() + new);
|
|
#ifdef DEBUGGING
|
|
say("oldchar = '%c', newchar = '%c'\n",
|
|
pch_char(old), pch_char(new));
|
|
#endif
|
|
my_exit(1);
|
|
}
|
|
else if (pch_char(new) == '!') {
|
|
copy_till(where + old - 1);
|
|
if (R_do_defines) {
|
|
fputs(not_defined, ofp);
|
|
def_state = IN_IFNDEF;
|
|
}
|
|
while (pch_char(old) == '!') {
|
|
if (R_do_defines) {
|
|
fputs(pfetch(old), ofp);
|
|
}
|
|
last_frozen_line++;
|
|
old++;
|
|
}
|
|
if (R_do_defines) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
}
|
|
while (pch_char(new) == '!') {
|
|
fputs(pfetch(new), ofp);
|
|
new++;
|
|
}
|
|
}
|
|
else {
|
|
assert(pch_char(new) == ' ');
|
|
old++;
|
|
new++;
|
|
if (R_do_defines && def_state != OUTSIDE) {
|
|
fputs(end_defined, ofp);
|
|
def_state = OUTSIDE;
|
|
}
|
|
}
|
|
}
|
|
if (new <= pat_end && pch_char(new) == '+') {
|
|
copy_till(where + old - 1);
|
|
if (R_do_defines) {
|
|
if (def_state == OUTSIDE) {
|
|
fputs(if_defined, ofp);
|
|
def_state = IN_IFDEF;
|
|
}
|
|
else if (def_state == IN_IFNDEF) {
|
|
fputs(else_defined, ofp);
|
|
def_state = IN_ELSE;
|
|
}
|
|
}
|
|
while (new <= pat_end && pch_char(new) == '+') {
|
|
fputs(pfetch(new), ofp);
|
|
new++;
|
|
}
|
|
}
|
|
if (R_do_defines && def_state != OUTSIDE) {
|
|
fputs(end_defined, ofp);
|
|
}
|
|
}
|
|
|
|
/* Open the new file. */
|
|
|
|
static void
|
|
init_output(char *name)
|
|
{
|
|
ofp = fopen(name, "w");
|
|
if (ofp == NULL)
|
|
pfatal("can't create %s", name);
|
|
}
|
|
|
|
/* Open a file to put hunks we can't locate. */
|
|
|
|
static void
|
|
init_reject(char *name)
|
|
{
|
|
rejfp = fopen(name, "w");
|
|
if (rejfp == NULL)
|
|
pfatal("can't create %s", name);
|
|
}
|
|
|
|
/* Copy input file to output, up to wherever hunk is to be applied. */
|
|
|
|
static void
|
|
copy_till(LINENUM lastline)
|
|
{
|
|
LINENUM R_last_frozen_line = last_frozen_line;
|
|
|
|
if (R_last_frozen_line > lastline)
|
|
fatal("misordered hunks! output would be garbled\n");
|
|
while (R_last_frozen_line < lastline) {
|
|
dump_line(++R_last_frozen_line);
|
|
}
|
|
last_frozen_line = R_last_frozen_line;
|
|
}
|
|
|
|
/* Finish copying the input file to the output file. */
|
|
|
|
static void
|
|
spew_output(void)
|
|
{
|
|
#ifdef DEBUGGING
|
|
if (debug & 256)
|
|
say("il=%d lfl=%d\n",input_lines,last_frozen_line);
|
|
#endif
|
|
if (input_lines)
|
|
copy_till(input_lines); /* dump remainder of file */
|
|
Fclose(ofp);
|
|
ofp = NULL;
|
|
}
|
|
|
|
/* Copy one line from input to output. */
|
|
|
|
static void
|
|
dump_line(LINENUM line)
|
|
{
|
|
const char *s;
|
|
char R_newline = '\n';
|
|
|
|
/* Note: string is not null terminated. */
|
|
for (s=ifetch(line); putc(*s, ofp) != R_newline; s++) ;
|
|
}
|
|
|
|
/* Does the patch pattern match at line base+offset? */
|
|
|
|
static bool
|
|
patch_match(LINENUM base, LINENUM offset, LINENUM fuzz)
|
|
{
|
|
LINENUM pline = 1 + fuzz;
|
|
LINENUM iline;
|
|
LINENUM pat_lines = pch_ptrn_lines() - fuzz;
|
|
|
|
for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) {
|
|
if (canonicalize) {
|
|
if (!similar(ifetch(iline),
|
|
pfetch(pline),
|
|
pch_line_len(pline) ))
|
|
return FALSE;
|
|
}
|
|
else if (strnNE(ifetch(iline),
|
|
pfetch(pline),
|
|
pch_line_len(pline) ))
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Do two lines match with canonicalized white space? */
|
|
|
|
static bool
|
|
similar(const char *a, const char *b, size_t len)
|
|
{
|
|
while (len) {
|
|
if (isspace((unsigned char)*b)) {/* whitespace (or \n) to match? */
|
|
if (!isspace((unsigned char)*a))/* no corresponding whitespace? */
|
|
return FALSE;
|
|
while (len && isspace((unsigned char)*b) && *b != '\n')
|
|
b++,len--; /* skip pattern whitespace */
|
|
while (isspace((unsigned char)*a) && *a != '\n')
|
|
a++; /* skip target whitespace */
|
|
if (*a == '\n' || *b == '\n')
|
|
return (*a == *b); /* should end in sync */
|
|
}
|
|
else if (*a++ != *b++) /* match non-whitespace chars */
|
|
return FALSE;
|
|
else
|
|
len--; /* probably not necessary */
|
|
}
|
|
return TRUE; /* actually, this is not reached */
|
|
/* since there is always a \n */
|
|
}
|
|
|
|
/* Exit with cleanup. */
|
|
|
|
void
|
|
my_exit(int status)
|
|
{
|
|
Unlink(TMPINNAME);
|
|
if (!toutkeep) {
|
|
Unlink(TMPOUTNAME);
|
|
}
|
|
if (!trejkeep) {
|
|
Unlink(TMPREJNAME);
|
|
}
|
|
Unlink(TMPPATNAME);
|
|
exit(status);
|
|
}
|