changelog

这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易于我们学习和理解

	(remove_prefix): New function.
	(vfprintf): New function, if !HAVE_VPRINTF.
	(afatal, apfatal, zfatal, zpfatal, errnum): Remove.
	(fatal, pfatal, say): New functions that use stdarg.
	All callers changed.
	(zask): Renamed from `ask'.  Now uses stdarg.  Output to stdout,
	and read from /dev/tty, or if that cannot be opened, from
	stderr, stdout, stdin, whichever is first a tty.
	Print "EOF" when an EOF is read.  Do not echo input.
	(sigs): New array.
	(sigset_t, sigemptyset, sigmask, sigaddset, sigismember, SIG_BLOCK,
	SIG_UNBLOCK, SIG_SETMASK, sigprocmask, sigblock, sigsetmask):
	Define substitutes if not available.
	(initial_signal_mask, signals_to_block): New vars.
	(fatal_exit_handler): New function, if !HAVE_SIGACTION.
	(set_signals, ignore_signals): Use sigaction and sigprocmask style
	signal-handling if possible; it doesn't lose signals.
	(set_signals): Default SIGCHLD to work around SysV fork+wait bug.
	(mkdir): First arg is now const *.
	(makedirs): Handle multiple adjacent slashes correctly.
	(fetchname): Do not worry about whether the file exists
	(that is now the caller's responsibility).
	Treat a sequence of one or more slashes like one slash.
	Do not unstrip leading directories if they all exist and if
	no -p option was given; POSIX doesn't allow this.
	(memcmp): Remove (now a macro in common.h).

	* version.c (copyright_string, free_software_msgid, authorship_msgid):
	New constants.
	(version): Use them.  Use program_name instead of hardwiring it.

	* patch.man: Generate date from RCS Id.
	Rewrite to match the above changes.

Fri Jul 30 02:02:51 1993  Paul Eggert  ([e-mail])

	* configure.in (AC_HAVE_FUNCS): Add mkdir.

	* common.h (Chmod, Fputc, Write, VOID): New macros.
	(malloc, realloc): Yield `VOID *', not `char *'.

	* util.h (makedirs): Omit `striplast' argument.  Remove `aask'.

	* inp.c (plan_a): Remove fixed internal buffer.  Remove lint.

	* util.c (set_signals, ignore_signals): Trap SIGTERM, too.
	(makedirs): Removed fixed internal buffer.  Omit `striplast' argument.
	(mkdir): New function, if !HAVE_MKDIR.
	(fetchname): Remove fixed internal buffer.
	Remove lint from various functions.

	* patch.c, pch.c: Remove lint.

Thu Jul 29 20:52:07 1993  David J. MacKenzie  ([e-mail])

	* Makefile.in (config.status): Run config.status --recheck, not
	configure, to get the right args passed.

Thu Jul 29 07:46:16 1993  Paul Eggert  ([e-mail])

	* The following changes remove all remaining fixed limits on memory,
	and fix bugs in patch's handling of null bytes and files that do not
	end in newline.  `Patch' now works on binary files.

	* backupfile.c (find_backup_file_name): Don't dump core if malloc fails.

	* EXTERN.h, INTERN.h (EXITING): New macro.
	* backupfile.[ch], patch.c, pch.c: Add PARAMS to function declarations.

	* common.h (bool): Change to int, so ANSI C prototype promotion works.
	(CANVARARG): Remove varargs hack; it wasn't portable.
	(filearg): Now a pointer, not an array, so that it can be reallocated.
	(GET*, SCCSDIFF, CHECKOUT*, RCSDIFF): Quote operands to commands.
	(my_exit): Declare here.
	(BUFFERSIZE, Ctl, filemode, Fseek, Fstat, Lseek, MAXFILEC, MAXHUNKSIZE,
	Mktemp, myuid, Null, Nullch, Nullfp, Nulline, Pclose, VOIDUSED): Remove.
	All invokers changed.
	(Argc, Argv, *define[sd], last_offset, maxfuzz, noreverse, ofp,
	optind_last, rejfp, rejname): No longer externally visible; all
	definers changed.
	(INT_MAX, INT_MIN, STD*_FILENO, SEEK_SET): Define if the underlying
	system doesn't.  Include <limits.h> for this.

	* configure.in: Add limits.h, memcmp.  Delete getline.

	* inp.c (tibufsize): New variable; buffers grow as needed.
	(TIBUFSIZE_MINIMUM): New macro.
	(report_revision): New function.
	(plan_a): Do not search patch as a big string, since that fails
	if it contains null bytes.
	Prepend `./' to filenames starting with `-', for RCS and SCCS.
	If file does not match default RCS/SCCS version, go ahead and patch
	it anyway; warn about the problem but do not report a fatal error.
	(plan_b): Do not use a fixed buffer to read lines; read byte by byte
	instead, so that the lines can be arbitrarily long.  Do not search
	lines as strings, since they may contain null bytes.
	(plan_a, plan_b): Report I/O errors.

	* inp.c, inp.h (rev_in_string): Remove.
	(ifetch): Yield size of line too, since strlen no longer applies.
	(plan_a, plan_b): No longer exported.

	* patch.c (abort_hunk, apply_hunk, patch_match, similar):
	Lines may contain NUL and need not end in newline.
	(copy_till, dump_line): Insert newline if appending after partial line.
	All invokers changed.
	(main, get_some_switches, apply_hunk): Allocate *_define[ds], filearg,
	rejname dynamically.
	(make_temp): New function.
	(main): Use it.
	(main, spew_output, dump_line) Check for I/O errors.

	* pch.c (open_patch_file): Don't copy stdin to a temporary file if
	it's a regular file, since we can seek on it directly.
	(open_patch_file, skip_to, another_hunk): The patch file may contain
	NULs.
	(another_hunk): The patch file may contain lines starting with '\',
	which means the preceding line lacked a trailing newline.
	(pgetline): Rename to pget_line.
	(get_line, incomplete_line, pch_write_line): New functions.
	(pch_line_len): Return size_t, not short; lines may be very long.
	(do_ed_script): Check for I/O errors.  Allow scripts to contain
	'i' and 's' commands, too.

	* pch.h (pfp, grow_hunkmax, intuit_diff_type, next_intuit_at, skip_to,
	pfetch, pgetline): No longer exported.
	(pch_write_line): New declaration.
	(getline): Removed.

	* util.c (move_file, fetchname): Use private stat buffer, so that
	filestat isn't lost.  Check for I/O errors.
	(savestr): Use savebuf.
	(zask): Use STD*_FILENO instead of 0, 1, 2.
	(fetchname): strip_leading defaults to INT_MAX instead of 957 (!).
	(memcmp): Define if !HAVE_MEMCMP.

	* util.c, util.h (say*, fatal*, pfatal*, ask*): Delete; these
	pseudo-varargs functions weren't ANSI C.  Replace by macros
	that invoke [fs]printf directly, and invoke new functions
	[az]{say,fatal,pfatal,ask} before and after.
	(savebuf, read_fatal, write_fatal, memory_fatal, Fseek): New functions.
	(fatal*): Output trailing newline after message.  All invokers changed.

	* version.c (version): Don't exit.

	* Makefile.in (SRCS): Remove getline.c.

Thu Jul 22 15:24:24 1993  David J. MacKenzie  ([e-mail])

	* EXTERN.h, INTERN.h (PARAMS): Define.
	* backupfile.h, common.h, inp.h, pch.h, util.h: Use.
	* backupfile.c: Include EXTERN.h.

Wed Jul 21 13:14:05 1993  David J. MacKenzie  ([e-mail])

	* getline.c: New file.
	* configure.in: Check for getline (GNU libc has it).
	* pch.c: Use it instead of fgets.
	(pgetline): Renamed from pgets.  Change callers.
	* pch.h: Change decl.

	* pch.c (pgets): Tab adjusts by 8 - (indent % 8), not % 7.
	Be consistent with similar code in pch.c::intuit_diff_type.

	* common.h (MEM): Typedef removed.
	inp.c, pch.c, util.c: Use size_t instead of MEM.
	inp.c, pch.c: Use off_t.
	configure.in: Add AC_SIZE_T and AC_OFF_T.

	* common.h: Make buf a pointer and add a bufsize variable.
	* util.c, pch.c, inp.c: Replace sizeof buf with bufsize.
	* patch.c: malloc buf to bufsize bytes.

Tue Jul 20 20:40:03 1993  Paul Eggert  ([e-mail])

	* common.h (BUFFERSIZE): Grow it to 8k too, just in case.
	(buf): Turn `buf' back into an array; making it a pointer broke
	things seriously.
	* patch.c (main): Likewise.

Tue Jul 20 20:02:40 1993  David J. MacKenzie  ([e-mail])

	* Move Reg[1-16] and CANVARARG decls from config.h.in to common.h.
	* acconfig.h: New file.
	* Makefile (HDRS): Add it.

Tue Jul 20 16:35:27 1993  Paul Eggert  ([e-mail])

	* Makefile.in: Remove alloca.[co]; getopt no longer needs it.
	* configure.in (AC_ALLOCA): Remove.

	* util.c (set_signals, ignore_signals): Do nothing if SIGHUP
	and SIGINT aren't defined.

Tue Jul 20 17:59:56 1993  David J. MacKenzie  ([e-mail])

	* patch.c (main): Call xmalloc, not malloc.  xmalloc buf.
	* common.h: Declare xmalloc.  Make buf a pointer, not an array.

	* util.c (xmalloc): Call fatal1, not fatal.

	* common.h [MAXLINELEN]: Bump from 1k to 8k.

Thu Jul  8 19:56:16 1993  David J. MacKenzie  ([e-mail])

	* Makefile.in (installdirs): New target.
	(install): Use it.
	(Makefile, config.status, configure): New targets.

Wed Jul  7 13:25:40 1993  David J. MacKenzie  ([e-mail])

	* patch.c (get_some_switches, longopts): Recognize --help
	option, and call usage.
	(usage): New function.

Fri Jun 25 07:49:45 1993  Paul Eggert  ([e-mail])

	* backupfile.c (find_backup_file_name): Don't use .orig if
	numbered_existing with no existing numbered backup.
	(addext):  Don't use ext if !HAVE_LONG_FILE_NAMES,
	even if it would fit.  This matches patch's historical behavior.
	(simple_backup_suffix): Default to ".orig".
	* patch.c (main): Just use that default.

Tue Jun 15 22:32:14 1993  Paul Eggert  ([e-mail])

	* config.h.in (HAVE_ALLOCA_H): This #undef was missing.
	* Makefile.in (info, check, installcheck): New rules.

Sun Jun 13 14:31:29 1993  Paul Eggert  ([e-mail])

	* config.h.in (index, rindex): Remove unused macro
	definitions; they get in the way when porting to AIX.
	* config.h.in, configure.in (HAVE_STRING_H): Remove unused defn.

Thu Jun 10 21:13:47 1993  Paul Eggert  ([e-mail])

	* patchlevel.h: PATCH_VERSION 2.1.
	(The name `patch-2.0.12g12' is too long for traditional Unix.)

	* patchlevel.h (PATCH_VERSION): Renamed from PATCHLEVEL.
	Now contains the entire patch version number.
	* version.c (version): Use it.

Wed Jun  9 21:43:23 1993  Paul Eggert  ([e-mail])

	* common.h: Remove declarations of index and rindex.
	* backupfile.c: Likewise.
	(addext, basename, dirname): Avoid rindex.

Tue Jun  8 15:24:14 1993  Paul Eggert  ([e-mail])

	* inp.c (plan_a): Check that RCS and working files are not the
	same.  This check is needed on hosts that do not report file
	name length limits and have short limits.

Sat Jun  5 22:56:07 1993  Paul Eggert  ([e-mail])

	* Makefile.in (.c.o): Put $(CFLAGS) after other options.
	(dist): Switch from .z to .gz.

Wed Jun  2 10:37:15 1993  Paul Eggert  ([e-mail])

	* backupfile.c (find_backup_file_name): Initialize copy of
	file name properly.

Mon May 31 21:55:21 1993  Paul Eggert  ([e-mail])

	* patchlevel.h: Patch level 12g11.

	* pch.c (p_Char): Renamed from p_char, which is a system type
	in Tex XD88's <sys/types.h>.

	* backupfile.c: Include "config.h" first, so that `const' is
	treated consistently in system headers.

Mon May 31 16:06:23 1993  Paul Eggert  ([e-mail])

	* patchlevel.h: Patch level 12g10.

	* configure.in: Add AC_CONST.
	* config.h.in: Add `const'.
	* Makefile.in (.c.o): Add -DHAVE_CONFIG_H.
	(getopt.o getopt1.o): Depend on config.h.

	* util.c (xmalloc): New function; alloca.c needs this.

Mon May 31 00:49:40 1993  Paul Eggert  ([e-mail])

	* patchlevel.h: PATCHLEVEL 12g9.

	* backupfile.c, backupfile.h (addext): New function.
	It uses pathconf(), if available, to determine maximum file
	name length.
	* patch.c (main): Use it for reject file name.
	* common.h (ORIGEXT): Moved to patch.c.
	* config.h.in (HAVE_PATHCONF): New macro.
	* configure.in: Define it.

	* Makefile.in (dist): Use gzip, not compress.

Sat May 29 09:42:18 1993  Paul Eggert  ([e-mail])

	* patch.c (main): Use pathconf to decide reject file name.
	* common.h (REJEXT): Remove.

	* inp.c (plan_a): Don't lock the checked-out file if `patch -o'
	redirected the output elsewhere.
	* common.h (CHECKOUT_LOCKED, GET_LOCKED): New macros.  GET and
	CHECKOUT now just checkout unlocked copies.

Fri May 28 08:44:50 1993  Paul Eggert  ([e-mail])

	* backupfile.c (basename): Define even if NODIR isn't defined.
	* patch.c (main): Ask just once to apply a reversed patch.

Tue Nov 24 08:09:04 1992  David J. MacKenzie  ([e-mail])

	* config.h.in, common.h: Use HAVE_FCNTL_H and HAVE_STRING_H
	instead of USG.

	* backupfile.c: Use SYSDIR and NDIR instead of USG.
	Define direct as dirent, not vice-versa.

Wed Sep 16 17:11:48 1992  David J. MacKenzie  ([e-mail])

	* patch.c (get_some_switches): optc should be int, not char.

Tue Sep 15 00:36:46 1992  David J. MacKenzie  ([e-mail])

	* patchlevel.h: PATCHLEVEL 12g8.

Mon Sep 14 22:01:23 1992  David J. MacKenzie  ([e-mail])

	* Makefile.in: Add uninstall target.

	* util.c (fatal, pfatal): Add some asterisks to make fatal
	messages stand out more.