svn commit: r204898 - user/delphij/patch
Xin LI
delphij at FreeBSD.org
Mon Mar 8 23:06:10 UTC 2010
Author: delphij
Date: Mon Mar 8 23:06:09 2010
New Revision: 204898
URL: http://svn.freebsd.org/changeset/base/204898
Log:
Initial work on the fully BSD licensed patch(1). This is a port from
OpenBSD's patch(1) as of today with local changes for WARNS=6.
Obtained from: OpenBSD
Added:
user/delphij/patch/
user/delphij/patch/Makefile (contents, props changed)
user/delphij/patch/README
user/delphij/patch/backupfile.c (contents, props changed)
user/delphij/patch/backupfile.h (contents, props changed)
user/delphij/patch/common.h (contents, props changed)
user/delphij/patch/inp.c (contents, props changed)
user/delphij/patch/inp.h (contents, props changed)
user/delphij/patch/mkpath.c (contents, props changed)
user/delphij/patch/patch.1 (contents, props changed)
user/delphij/patch/patch.c (contents, props changed)
user/delphij/patch/pathnames.h (contents, props changed)
user/delphij/patch/pch.c (contents, props changed)
user/delphij/patch/pch.h (contents, props changed)
user/delphij/patch/util.c (contents, props changed)
user/delphij/patch/util.h (contents, props changed)
Added: user/delphij/patch/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/delphij/patch/Makefile Mon Mar 8 23:06:09 2010 (r204898)
@@ -0,0 +1,7 @@
+# $OpenBSD: Makefile,v 1.4 2005/05/16 15:22:46 espie Exp $
+# $FreeBSD$
+
+PROG= patch
+SRCS= patch.c pch.c inp.c util.c backupfile.c mkpath.c
+
+.include <bsd.prog.mk>
Added: user/delphij/patch/README
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/delphij/patch/README Mon Mar 8 23:06:09 2010 (r204898)
@@ -0,0 +1,125 @@
+$FreeBSD$
+
+this version modified to fit in with the 386bsd release.
+this isn't gnu software, so we're not obligated to give
+you the original sources -- if you want them, get them
+from prep.ai.mit.edu:pub/gnu/patch-2.0.12u8.tar.z
+
+ -- cgd
+
+#######################################################################
+
+
+This version of patch contains modifications made by the Free Software
+Foundation, summarized in the file ChangeLog. Primarily they are to
+support the unified context diff format that GNU diff can produce, and
+to support making GNU Emacs-style backup files. They also include
+fixes for some bugs.
+
+There are two GNU variants of patch: this one, which retains Larry
+Wall's interactive Configure script and has patchlevels starting with
+`12u'; and another one that has a GNU-style non-interactive configure
+script and accepts long-named options, and has patchlevels starting
+with `12g'. Unlike the 12g variant, the 12u variant contains no
+copylefted code, for the paranoid. The two variants are otherwise the
+same. They should be available from the same places.
+
+The FSF is distributing this version of patch independently because as
+of this writing, Larry Wall has not released a new version of patch
+since mid-1988. I have heard that he has been too busy working on
+other things, like Perl.
+
+Here is a wish list of some projects to improve patch:
+
+1. Correctly handle files and patchfiles that contain NUL characters.
+This is hard to do straightforwardly; it would be less work to
+adopt a kind of escape encoding internally.
+Let ESC be a "control prefix". ESC @ stands for NUL. ESC [ stands for ESC.
+You need to crunch this when reading input (replace fgets),
+and when writing the output file (replace fputs),
+but otherwise everything can go along as it does now.
+Be careful to handle reject files correctly;
+I think they are currently created using `write', not `fputs'.
+
+2. Correctly handle patches produced by GNU diff for files that do
+not end with a newline.
+
+Please send bug reports for this version of patch to
+bug-gnu-utils at prep.ai.mit.edu as well as to Larry Wall (lwall at netlabs.com).
+ --djm at gnu.ai.mit.edu (David MacKenzie)
+
+ Patch Kit, Version 2.0
+
+ Copyright (c) 1988, Larry Wall
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following condition
+is met:
+ 1. Redistributions of source code must retain the above copyright
+ notice, this condition and the following disclaimer.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+--------------------------------------------------------------------------
+
+Please read all the directions below before you proceed any further, and
+then follow them carefully. Failure to do so may void your warranty. :-)
+
+After you have unpacked your kit, you should have all the files listed
+in MANIFEST.
+
+Installation
+
+1) Run Configure. This will figure out various things about your system.
+ Some things Configure will figure out for itself, other things it will
+ ask you about. It will then proceed to make config.h, config.sh, and
+ Makefile.
+
+ You might possibly have to trim # comments from the front of Configure
+ if your sh doesn't handle them, but all other # comments will be taken
+ care of.
+
+ If you don't have sh, you'll have to rip the prototype of config.h out
+ of Configure and generate the defines by hand.
+
+2) Glance through config.h to make sure system dependencies are correct.
+ Most of them should have been taken care of by running the
+ Configure script.
+
+ If you have any additional changes to make to the C definitions, they
+ can be done in the Makefile, or in config.h. Bear in mind that they may
+ get undone next time you run Configure.
+
+3) make
+
+ This will attempt to make patch in the current directory.
+
+4) make install
+
+ This will put patch into a public directory (normally /usr/local/bin).
+ It will also try to put the man pages in a reasonable place. It will not
+ nroff the man page, however.
+
+5) Read the manual entry before running patch.
+
+6) IMPORTANT! Help save the world! Communicate any problems and
+ suggested patches to me, lwall at netlabs.com (Larry Wall),
+ so we can keep the world in sync. If you have a problem, there's
+ someone else out there who either has had or will have the same problem.
+
+ If possible, send in patches such that the patch program will apply them.
+ Context diffs are the best, then normal diffs. Don't send ed scripts--
+ I've probably changed my copy since the version you have.
+
+ Watch for patch patches in comp.sources.bugs. Patches will generally be
+ in a form usable by the patch program. Your current patch level
+ is shown in patchlevel.h.
Added: user/delphij/patch/backupfile.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/delphij/patch/backupfile.c Mon Mar 8 23:06:09 2010 (r204898)
@@ -0,0 +1,237 @@
+/* $OpenBSD: backupfile.c,v 1.20 2009/10/27 23:59:41 deraadt Exp $ */
+
+/*
+ * backupfile.c -- make Emacs style backup file names Copyright (C) 1990 Free
+ * Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * without restriction.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/*
+ * David MacKenzie <djm at ai.mit.edu>. Some algorithms adapted from GNU Emacs.
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <ctype.h>
+#include <dirent.h>
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "backupfile.h"
+
+
+#define ISDIGIT(c) (isascii (c) && isdigit (c))
+
+/* Which type of backup file names are generated. */
+enum backup_type backup_type = none;
+
+/*
+ * The extension added to file names to produce a simple (as opposed to
+ * numbered) backup file name.
+ */
+const char *simple_backup_suffix = "~";
+
+static char *concat(const char *, const char *);
+static char *make_version_name(const char *, int);
+static int max_backup_version(const char *, const char *);
+static int version_number(const char *, const char *, size_t);
+static int argmatch(const char *, const char **);
+static void invalid_arg(const char *, const char *, int);
+
+/*
+ * Return the name of the new backup file for file FILE, allocated with
+ * malloc. Return 0 if out of memory. FILE must not end with a '/' unless it
+ * is the root directory. Do not call this function if backup_type == none.
+ */
+char *
+find_backup_file_name(const char *file)
+{
+ char *dir, *base_versions;
+ int highest_backup;
+
+ if (backup_type == simple)
+ return concat(file, simple_backup_suffix);
+ base_versions = concat(basename(file), ".~");
+ if (base_versions == NULL)
+ return NULL;
+ dir = dirname(file);
+ if (dir == NULL) {
+ free(base_versions);
+ return NULL;
+ }
+ highest_backup = max_backup_version(base_versions, dir);
+ free(base_versions);
+ if (backup_type == numbered_existing && highest_backup == 0)
+ return concat(file, simple_backup_suffix);
+ return make_version_name(file, highest_backup + 1);
+}
+
+/*
+ * Return the number of the highest-numbered backup file for file FILE in
+ * directory DIR. If there are no numbered backups of FILE in DIR, or an
+ * error occurs reading DIR, return 0. FILE should already have ".~" appended
+ * to it.
+ */
+static int
+max_backup_version(const char *file, const char *dir)
+{
+ DIR *dirp;
+ struct dirent *dp;
+ int highest_version, this_version;
+ size_t file_name_length;
+
+ dirp = opendir(dir);
+ if (dirp == NULL)
+ return 0;
+
+ highest_version = 0;
+ file_name_length = strlen(file);
+
+ while ((dp = readdir(dirp)) != NULL) {
+ if (dp->d_namlen <= file_name_length)
+ continue;
+
+ this_version = version_number(file, dp->d_name, file_name_length);
+ if (this_version > highest_version)
+ highest_version = this_version;
+ }
+ closedir(dirp);
+ return highest_version;
+}
+
+/*
+ * Return a string, allocated with malloc, containing "FILE.~VERSION~".
+ * Return 0 if out of memory.
+ */
+static char *
+make_version_name(const char *file, int version)
+{
+ char *backup_name;
+
+ if (asprintf(&backup_name, "%s.~%d~", file, version) == -1)
+ return NULL;
+ return backup_name;
+}
+
+/*
+ * If BACKUP is a numbered backup of BASE, return its version number;
+ * otherwise return 0. BASE_LENGTH is the length of BASE. BASE should
+ * already have ".~" appended to it.
+ */
+static int
+version_number(const char *base, const char *backup, size_t base_length)
+{
+ int version;
+ const char *p;
+
+ version = 0;
+ if (!strncmp(base, backup, base_length) && ISDIGIT(backup[base_length])) {
+ for (p = &backup[base_length]; ISDIGIT(*p); ++p)
+ version = version * 10 + *p - '0';
+ if (p[0] != '~' || p[1])
+ version = 0;
+ }
+ return version;
+}
+
+/*
+ * Return the newly-allocated concatenation of STR1 and STR2. If out of
+ * memory, return 0.
+ */
+static char *
+concat(const char *str1, const char *str2)
+{
+ char *newstr;
+
+ if (asprintf(&newstr, "%s%s", str1, str2) == -1)
+ return NULL;
+ return newstr;
+}
+
+/*
+ * If ARG is an unambiguous match for an element of the null-terminated array
+ * OPTLIST, return the index in OPTLIST of the matched element, else -1 if it
+ * does not match any element or -2 if it is ambiguous (is a prefix of more
+ * than one element).
+ */
+static int
+argmatch(const char *arg, const char **optlist)
+{
+ int i; /* Temporary index in OPTLIST. */
+ size_t arglen; /* Length of ARG. */
+ int matchind = -1; /* Index of first nonexact match. */
+ int ambiguous = 0; /* If nonzero, multiple nonexact match(es). */
+
+ arglen = strlen(arg);
+
+ /* Test all elements for either exact match or abbreviated matches. */
+ for (i = 0; optlist[i]; i++) {
+ if (!strncmp(optlist[i], arg, arglen)) {
+ if (strlen(optlist[i]) == arglen)
+ /* Exact match found. */
+ return i;
+ else if (matchind == -1)
+ /* First nonexact match found. */
+ matchind = i;
+ else
+ /* Second nonexact match found. */
+ ambiguous = 1;
+ }
+ }
+ if (ambiguous)
+ return -2;
+ else
+ return matchind;
+}
+
+/*
+ * Error reporting for argmatch. KIND is a description of the type of entity
+ * that was being matched. VALUE is the invalid value that was given. PROBLEM
+ * is the return value from argmatch.
+ */
+static void
+invalid_arg(const char *kind, const char *value, int problem)
+{
+ fprintf(stderr, "patch: ");
+ if (problem == -1)
+ fprintf(stderr, "invalid");
+ else /* Assume -2. */
+ fprintf(stderr, "ambiguous");
+ fprintf(stderr, " %s `%s'\n", kind, value);
+}
+
+static const char *backup_args[] = {
+ "never", "simple", "nil", "existing", "t", "numbered", 0
+};
+
+static enum backup_type backup_types[] = {
+ simple, simple, numbered_existing,
+ numbered_existing, numbered, numbered
+};
+
+/*
+ * Return the type of backup indicated by VERSION. Unique abbreviations are
+ * accepted.
+ */
+enum backup_type
+get_version(const char *version)
+{
+ int i;
+
+ if (version == NULL || *version == '\0')
+ return numbered_existing;
+ i = argmatch(version, backup_args);
+ if (i >= 0)
+ return backup_types[i];
+ invalid_arg("version control type", version, i);
+ exit(2);
+}
Added: user/delphij/patch/backupfile.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/delphij/patch/backupfile.h Mon Mar 8 23:06:09 2010 (r204898)
@@ -0,0 +1,39 @@
+/* $OpenBSD: backupfile.h,v 1.6 2003/07/28 18:35:36 otto Exp $ */
+
+/*
+ * backupfile.h -- declarations for making Emacs style backup file names
+ * Copyright (C) 1990 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * without restriction.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $FreeBSD$
+ */
+
+/* When to make backup files. */
+enum backup_type {
+ /* Never make backups. */
+ none,
+
+ /* Make simple backups of every file. */
+ simple,
+
+ /*
+ * Make numbered backups of files that already have numbered backups,
+ * and simple backups of the others.
+ */
+ numbered_existing,
+
+ /* Make numbered backups of every file. */
+ numbered
+};
+
+extern enum backup_type backup_type;
+extern const char *simple_backup_suffix;
+
+char *find_backup_file_name(const char *file);
+enum backup_type get_version(const char *version);
Added: user/delphij/patch/common.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/delphij/patch/common.h Mon Mar 8 23:06:09 2010 (r204898)
@@ -0,0 +1,118 @@
+/* $OpenBSD: common.h,v 1.26 2006/03/11 19:41:30 otto Exp $ */
+
+/*
+ * patch - a program to apply diffs to original files
+ *
+ * Copyright 1986, Larry Wall
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following condition is met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this condition and the following disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * -C option added in 1998, original code by Marc Espie, based on FreeBSD
+ * behaviour
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+
+#include <stdbool.h>
+
+#define DEBUGGING
+
+/* constants */
+
+#define MAXHUNKSIZE 100000 /* is this enough lines? */
+#define INITHUNKMAX 125 /* initial dynamic allocation size */
+#define MAXLINELEN 8192
+#define BUFFERSIZE 1024
+
+#define SCCSPREFIX "s."
+#define GET "get -e %s"
+#define SCCSDIFF "get -p %s | diff - %s >/dev/null"
+
+#define RCSSUFFIX ",v"
+#define CHECKOUT "co -l %s"
+#define RCSDIFF "rcsdiff %s > /dev/null"
+
+#define ORIGEXT ".orig"
+#define REJEXT ".rej"
+
+/* handy definitions */
+
+#define strNE(s1,s2) (strcmp(s1, s2))
+#define strEQ(s1,s2) (!strcmp(s1, s2))
+#define strnNE(s1,s2,l) (strncmp(s1, s2, l))
+#define strnEQ(s1,s2,l) (!strncmp(s1, s2, l))
+
+/* typedefs */
+
+typedef long LINENUM; /* must be signed */
+
+/* globals */
+
+extern mode_t filemode;
+
+extern char buf[MAXLINELEN];/* general purpose buffer */
+
+extern bool using_plan_a; /* try to keep everything in memory */
+extern bool out_of_mem; /* ran out of memory in plan a */
+
+#define MAXFILEC 2
+
+extern char *filearg[MAXFILEC];
+extern bool ok_to_create_file;
+extern char *outname;
+extern char *origprae;
+
+extern char *TMPOUTNAME;
+extern char *TMPINNAME;
+extern char *TMPREJNAME;
+extern char *TMPPATNAME;
+extern bool toutkeep;
+extern bool trejkeep;
+
+#ifdef DEBUGGING
+extern int debug;
+#endif
+
+extern bool force;
+extern bool batch;
+extern bool verbose;
+extern bool reverse;
+extern bool noreverse;
+extern bool skip_rest_of_patch;
+extern int strippath;
+extern bool canonicalize;
+/* TRUE if -C was specified on command line. */
+extern bool check_only;
+extern bool warn_on_invalid_line;
+extern bool last_line_missing_eol;
+
+
+#define CONTEXT_DIFF 1
+#define NORMAL_DIFF 2
+#define ED_DIFF 3
+#define NEW_CONTEXT_DIFF 4
+#define UNI_DIFF 5
+
+extern int diff_type;
+extern char *revision; /* prerequisite revision, if any */
+extern LINENUM input_lines; /* how long is input file in lines */
+
+extern int posix;
+
Added: user/delphij/patch/inp.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/delphij/patch/inp.c Mon Mar 8 23:06:09 2010 (r204898)
@@ -0,0 +1,468 @@
+/* $OpenBSD: inp.c,v 1.35 2009/10/27 23:59:41 deraadt Exp $ */
+
+/*
+ * patch - a program to apply diffs to original files
+ *
+ * Copyright 1986, Larry Wall
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following condition is met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this condition and the following disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * -C option added in 1998, original code by Marc Espie, based on FreeBSD
+ * behaviour
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include <ctype.h>
+#include <libgen.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "util.h"
+#include "pch.h"
+#include "inp.h"
+
+
+/* Input-file-with-indexable-lines abstract type */
+
+static off_t i_size; /* size of the input file */
+static char *i_womp; /* plan a buffer for entire file */
+static char **i_ptr; /* pointers to lines in i_womp */
+
+static int tifd = -1; /* plan b virtual string array */
+static char *tibuf[2]; /* plan b buffers */
+static LINENUM tiline[2] = {-1, -1}; /* 1st line in each buffer */
+static LINENUM lines_per_buf; /* how many lines per buffer */
+static int tireclen; /* length of records in tmp file */
+
+static bool rev_in_string(const char *);
+static bool reallocate_lines(size_t *);
+
+/* returns false if insufficient memory */
+static bool plan_a(const char *);
+
+static void plan_b(const char *);
+
+/* New patch--prepare to edit another file. */
+
+void
+re_input(void)
+{
+ if (using_plan_a) {
+ i_size = 0;
+ free(i_ptr);
+ i_ptr = NULL;
+ if (i_womp != NULL) {
+ munmap(i_womp, i_size);
+ i_womp = NULL;
+ }
+ } else {
+ using_plan_a = true; /* maybe the next one is smaller */
+ close(tifd);
+ tifd = -1;
+ free(tibuf[0]);
+ free(tibuf[1]);
+ tibuf[0] = tibuf[1] = NULL;
+ tiline[0] = tiline[1] = -1;
+ tireclen = 0;
+ }
+}
+
+/* Construct the line index, somehow or other. */
+
+void
+scan_input(const char *filename)
+{
+ if (!plan_a(filename))
+ plan_b(filename);
+ if (verbose) {
+ say("Patching file %s using Plan %s...\n", filename,
+ (using_plan_a ? "A" : "B"));
+ }
+}
+
+static bool
+reallocate_lines(size_t *lines_allocated)
+{
+ char **p;
+ size_t new_size;
+
+ new_size = *lines_allocated * 3 / 2;
+ p = realloc(i_ptr, (new_size + 2) * sizeof(char *));
+ if (p == NULL) { /* shucks, it was a near thing */
+ munmap(i_womp, i_size);
+ i_womp = NULL;
+ free(i_ptr);
+ i_ptr = NULL;
+ *lines_allocated = 0;
+ return false;
+ }
+ *lines_allocated = new_size;
+ i_ptr = p;
+ return true;
+}
+
+/* Try keeping everything in memory. */
+
+static bool
+plan_a(const char *filename)
+{
+ int ifd, statfailed;
+ char *p, *s, lbuf[MAXLINELEN];
+ struct stat filestat;
+ off_t i;
+ ptrdiff_t sz;
+ size_t iline, lines_allocated;
+
+#ifdef DEBUGGING
+ if (debug & 8)
+ return false;
+#endif
+
+ if (filename == NULL || *filename == '\0')
+ return false;
+
+ statfailed = stat(filename, &filestat);
+ if (statfailed && ok_to_create_file) {
+ if (verbose)
+ say("(Creating file %s...)\n", filename);
+
+ /*
+ * in check_patch case, we still display `Creating file' even
+ * though we're not. The rule is that -C should be as similar
+ * to normal patch behavior as possible
+ */
+ if (check_only)
+ return true;
+ makedirs(filename, true);
+ close(creat(filename, 0666));
+ statfailed = stat(filename, &filestat);
+ }
+ if (statfailed && check_only)
+ fatal("%s not found, -C mode, can't probe further\n", filename);
+ /* For nonexistent or read-only files, look for RCS or SCCS versions. */
+ if (statfailed ||
+ /* No one can write to it. */
+ (filestat.st_mode & 0222) == 0 ||
+ /* I can't write to it. */
+ ((filestat.st_mode & 0022) == 0 && filestat.st_uid != getuid())) {
+ const char *cs = NULL, *filebase, *filedir;
+ struct stat cstat;
+
+ filebase = basename(filename);
+ filedir = dirname(filename);
+
+ /* Leave room in lbuf for the diff command. */
+ s = lbuf + 20;
+
+#define try(f, a1, a2, a3) \
+ (snprintf(s, sizeof lbuf - 20, f, a1, a2, a3), stat(s, &cstat) == 0)
+
+ if (try("%s/RCS/%s%s", filedir, filebase, RCSSUFFIX) ||
+ try("%s/RCS/%s%s", filedir, filebase, "") ||
+ try("%s/%s%s", filedir, filebase, RCSSUFFIX)) {
+ snprintf(buf, sizeof buf, CHECKOUT, filename);
+ snprintf(lbuf, sizeof lbuf, RCSDIFF, filename);
+ cs = "RCS";
+ } else if (try("%s/SCCS/%s%s", filedir, SCCSPREFIX, filebase) ||
+ try("%s/%s%s", filedir, SCCSPREFIX, filebase)) {
+ snprintf(buf, sizeof buf, GET, s);
+ snprintf(lbuf, sizeof lbuf, SCCSDIFF, s, filename);
+ cs = "SCCS";
+ } else if (statfailed)
+ fatal("can't find %s\n", filename);
+ /*
+ * else we can't write to it but it's not under a version
+ * control system, so just proceed.
+ */
+ if (cs) {
+ if (!statfailed) {
+ if ((filestat.st_mode & 0222) != 0)
+ /* The owner can write to it. */
+ fatal("file %s seems to be locked "
+ "by somebody else under %s\n",
+ filename, cs);
+ /*
+ * It might be checked out unlocked. See if
+ * it's safe to check out the default version
+ * locked.
+ */
+ if (verbose)
+ say("Comparing file %s to default "
+ "%s version...\n",
+ filename, cs);
+ if (system(lbuf))
+ fatal("can't check out file %s: "
+ "differs from default %s version\n",
+ filename, cs);
+ }
+ if (verbose)
+ say("Checking out file %s from %s...\n",
+ filename, cs);
+ if (system(buf) || stat(filename, &filestat))
+ fatal("can't check out file %s from %s\n",
+ filename, cs);
+ }
+ }
+ filemode = filestat.st_mode;
+ if (!S_ISREG(filemode))
+ fatal("%s is not a normal file--can't patch\n", filename);
+ i_size = filestat.st_size;
+ if (out_of_mem) {
+ set_hunkmax(); /* make sure dynamic arrays are allocated */
+ out_of_mem = false;
+ return false; /* force plan b because plan a bombed */
+ }
+ if ((ifd = open(filename, O_RDONLY)) < 0)
+ pfatal("can't open file %s", filename);
+
+ i_womp = mmap(NULL, i_size, PROT_READ, MAP_PRIVATE, ifd, 0);
+ if (i_womp == MAP_FAILED) {
+ perror("mmap failed");
+ i_womp = NULL;
+ close(ifd);
+ return false;
+ }
+
+ close(ifd);
+ if (i_size)
+ madvise(i_womp, i_size, MADV_SEQUENTIAL);
+
+ /* estimate the number of lines */
+ lines_allocated = i_size / 25;
+ if (lines_allocated < 100)
+ lines_allocated = 100;
+
+ if (!reallocate_lines(&lines_allocated))
+ return false;
+
+ /* now scan the buffer and build pointer array */
+ iline = 1;
+ i_ptr[iline] = i_womp;
+ /* test for NUL too, to maintain the behavior of the original code */
+ for (s = i_womp, i = 0; i < i_size && *s != '\0'; s++, i++) {
+ if (*s == '\n') {
+ if (iline == lines_allocated) {
+ if (!reallocate_lines(&lines_allocated))
+ return false;
+ }
+ /* these are NOT NUL terminated */
+ i_ptr[++iline] = s + 1;
+ }
+ }
+ /* if the last line contains no EOL, append one */
+ if (i_size > 0 && i_womp[i_size - 1] != '\n') {
+ last_line_missing_eol = true;
+ /* fix last line */
+ sz = s - i_ptr[iline];
+ p = malloc(sz + 1);
+ if (p == NULL) {
+ free(i_ptr);
+ i_ptr = NULL;
+ munmap(i_womp, i_size);
+ i_womp = NULL;
+ return false;
+ }
+
+ memcpy(p, i_ptr[iline], sz);
+ p[sz] = '\n';
+ i_ptr[iline] = p;
+ /* count the extra line and make it point to some valid mem */
+ i_ptr[++iline] = strdup("");
+ } else
+ last_line_missing_eol = false;
+
+ input_lines = iline - 1;
+
+ /* now check for revision, if any */
+
+ if (revision != NULL) {
+ if (!rev_in_string(i_womp)) {
+ if (force) {
+ if (verbose)
+ say("Warning: this file doesn't appear "
+ "to be the %s version--patching anyway.\n",
+ revision);
+ } else if (batch) {
+ fatal("this file doesn't appear to be the "
+ "%s version--aborting.\n",
+ revision);
+ } else {
+ ask("This file doesn't appear to be the "
+ "%s version--patch anyway? [n] ",
+ revision);
+ if (*buf != 'y')
+ fatal("aborted\n");
+ }
+ } else if (verbose)
+ say("Good. This file appears to be the %s version.\n",
+ revision);
+ }
+ return true; /* plan a will work */
+}
+
+/* Keep (virtually) nothing in memory. */
+
+static void
+plan_b(const char *filename)
+{
+ FILE *ifp;
+ size_t i = 0, j, maxlen = 1;
+ char *p;
+ bool found_revision = (revision == NULL);
+
+ using_plan_a = false;
+ if ((ifp = fopen(filename, "r")) == NULL)
+ pfatal("can't open file %s", filename);
+ (void) unlink(TMPINNAME);
+ if ((tifd = open(TMPINNAME, O_EXCL | O_CREAT | O_WRONLY, 0666)) < 0)
+ pfatal("can't open file %s", TMPINNAME);
+ while (fgets(buf, sizeof buf, ifp) != NULL) {
+ if (revision != NULL && !found_revision && rev_in_string(buf))
+ found_revision = true;
+ if ((i = strlen(buf)) > maxlen)
+ maxlen = i; /* find longest line */
+ }
+ last_line_missing_eol = i > 0 && buf[i - 1] != '\n';
+ if (last_line_missing_eol && maxlen == i)
+ maxlen++;
+
+ if (revision != NULL) {
+ if (!found_revision) {
+ if (force) {
+ if (verbose)
+ say("Warning: this file doesn't appear "
+ "to be the %s version--patching anyway.\n",
+ revision);
+ } else if (batch) {
+ fatal("this file doesn't appear to be the "
+ "%s version--aborting.\n",
+ revision);
+ } else {
+ ask("This file doesn't appear to be the %s "
+ "version--patch anyway? [n] ",
+ revision);
+ if (*buf != 'y')
+ fatal("aborted\n");
+ }
+ } else if (verbose)
+ say("Good. This file appears to be the %s version.\n",
+ revision);
+ }
+ fseek(ifp, 0L, SEEK_SET); /* rewind file */
+ lines_per_buf = BUFFERSIZE / maxlen;
+ tireclen = maxlen;
+ tibuf[0] = malloc(BUFFERSIZE + 1);
+ if (tibuf[0] == NULL)
+ fatal("out of memory\n");
+ tibuf[1] = malloc(BUFFERSIZE + 1);
+ if (tibuf[1] == NULL)
+ fatal("out of memory\n");
+ for (i = 1;; i++) {
+ p = tibuf[0] + maxlen * (i % lines_per_buf);
+ if (i % lines_per_buf == 0) /* new block */
+ if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
+ pfatal("can't write temp file");
+ if (fgets(p, maxlen + 1, ifp) == NULL) {
+ input_lines = i - 1;
+ if (i % lines_per_buf != 0)
+ if (write(tifd, tibuf[0], BUFFERSIZE) < BUFFERSIZE)
+ pfatal("can't write temp file");
+ break;
+ }
+ j = strlen(p);
+ /* These are '\n' terminated strings, so no need to add a NUL */
+ if (j == 0 || p[j - 1] != '\n')
+ p[j] = '\n';
+ }
+ fclose(ifp);
+ close(tifd);
+ if ((tifd = open(TMPINNAME, O_RDONLY)) < 0)
+ pfatal("can't reopen file %s", TMPINNAME);
+}
+
+/*
+ * Fetch a line from the input file, \n terminated, not necessarily \0.
+ */
+char *
+ifetch(LINENUM line, int whichbuf)
+{
+ if (line < 1 || line > input_lines) {
+ if (warn_on_invalid_line) {
+ say("No such line %ld in input file, ignoring\n", line);
+ warn_on_invalid_line = false;
+ }
+ return NULL;
+ }
+ if (using_plan_a)
+ return i_ptr[line];
+ else {
+ LINENUM offline = line % lines_per_buf;
+ LINENUM baseline = line - offline;
+
+ if (tiline[0] == baseline)
+ whichbuf = 0;
+ else if (tiline[1] == baseline)
+ whichbuf = 1;
+ else {
+ tiline[whichbuf] = baseline;
+
+ if (lseek(tifd, (off_t) (baseline / lines_per_buf *
+ BUFFERSIZE), SEEK_SET) < 0)
+ pfatal("cannot seek in the temporary input file");
+
+ if (read(tifd, tibuf[whichbuf], BUFFERSIZE) < 0)
+ pfatal("error reading tmp file %s", TMPINNAME);
+ }
+ return tibuf[whichbuf] + (tireclen * offline);
+ }
+}
+
+/*
+ * True if the string argument contains the revision number we want.
+ */
+static bool
+rev_in_string(const char *string)
+{
+ const char *s;
+ size_t patlen;
+
+ if (revision == NULL)
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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