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

1997-08-31  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Version 2.5 released.

1997-07-21  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.4.4.
	* pch.c (there_is_another_patch), NEWS: Report an error if the patch
	input contains garbage but no patches.

	* pch.c (open_patch_file):
	Check for patch file too long (i.e., its size
	doesn't fit in a `long', and LFS isn't available).

	* inp.c (plan_a):
	Cast malloc return value, in case malloc returns char *.

1997-07-16  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.4.3.

	* NEWS, patch.man, pch.c (intuit_diff_type, get_line, pget_line):
	Now demangles RFC 934 encapsulation.
	* pch.c (p_rfc934_nesting): New var.

	* pch.c (intuit_diff_type): Don't bother to check file names carefully
	if we're going to return NO_DIFF.

	* inp.c (plan_a): Count the number of lines before allocating
	pointer-to-line buffer; this reduces memory requirements
	considerably (roughly by a factor of 5 on 32-bit hosts).
	Decrease `size' only when read unexpectedly reports EOF.
	(i_buffer): New var.
	(too_many_lines): New fn.
	(re_input): Free i_buffer if using plan A.
	Free buffers unconditionally; they can't be zero.

	* inp.c (plan_a, plan_b): Check for overflow of line counter.

	* pch.c (malformed), util.h (memory_fatal, read_fatal, write_fatal):
	Declare as noreturn.

1997-07-10  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.4.2.

	* util.c (ok_to_reverse), NEWS: The default answer is now `n';
	this is better for Emacs.

	* Makefile.in (dist): Use cp -p, not ln;
	some hosts do the wrong thing with ln if the source is a symbolic link.

	* patch.man: Fix typo: -y -> -Y.

1997-07-05  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.4.1.

	* patch.c: (main, get_some_switches), NEWS, patch.man:
	Version control is now independent of whether backups are made.
	* patch.c (option_help): Put version control options together.
	(get_some_switches): With CVS 1.9 hack, treat -b foo like -b -z foo,
	not just -z foo.  This change is needed due to recent change in -z.
	* backupfile.c (find_backup_file_name):
	backup_type == none causes undefined behavior;
	this undoes the previous change to this file.

	* patch.c (locate_hunk): Fix bug when locating context diff hunks
 	near end of file with nonzero fuzz.

	* util.c (move_file): Don't assume that ENOENT is reported when both
	ENOENT and EXDEV apply; this isn't true with DJGPP, and
	Posix doesn't require it.

	* pch.c (there_is_another_patch):
	Suggest -p when we can't intuit a file.

1997-06-19  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Version 2.4 released.
	* NEWS: Patch is now verbose when patches do not match exactly.

1997-06-17  Paul Eggert  <[e-mail]>

	* pc/djgpp/configure.sed (config.h): Remove redundant $(srcdir).

	* configure.in (VERSION): Bump to 2.3.9.
	* patch.c (main): By default, warn about hunks that succeed
	with nonzero offset.
	* patch.man: Add LC_ALL=C advice for making patches.
	* pc/djgpp/configure.sed (config.h): Fix paths to dependent files.

1997-06-17  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.8.

	* pch.c (open_patch_file): Test stdin for fseekability.
	(intuit_diff_type): Missing context diff headers are now warnings,
	not errors; some people use patches with them (e.g. when retrying
	rejects).

	* patch.c (struct outstate):
	New type, collecting together some output state vars.
	(apply_hunk, copy_till, spew_output, init_output): Use it.
	Keep track of whether some output has been generated.
	(backup_if_mismatch): New var.
	(ofp): Remove, in favor of local struct outstate vars.
	(main): Use struct outstate.  Initialize backup_if_mismatch to
	be the inverse of posixly_correct.  Keep track of whether mismatches
	occur, and use this to implement backup_if_mismatch.
	Report files that are not empty after patching, but should be.
	(longopts, option_help, get_some_switches): New options
	--backup-if-mismatch, --no-backup-if-mismatch.
	(get_some_switches): -B, -Y, -z no longer set backup_type.
	* backupfile.c (find_backup_file_name):
	Treat backup_type == none like simple.

	* Makefile.in (CONFIG_HDRS):
	Remove var; no longer needed by djgpp port.
	(DISTFILES_PC_DJGPP): Rename pc/djgpp/config.sed to
	pc/djgpp/configure.sed; remove pc/djgpp/config.h in favor of
	new file that edits it, called pc/djgpp/config.sed.
	* pc/djgpp/configure.bat: Rename config.sed to configure.sed.
	* pc/djgpp/configure.sed (CONFIG_HDRS): Remove.
	(config.h): Add rule to build this from config.hin and
	pc/djgpp/config.sed.
	* pc/djgpp/config.sed:
	Convert from .h file to .sed script that generates .h file.

	* NEWS: Describe --backup-if-mismatch, --no-backup-if-mismatch.
	* patch.man:
	Describe new options --backup-if-mismatch, --no-backup-if-mismatch
	and their ramifications.  Use unreadable backup to represent
	nonexistent file.

1997-06-12  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.7.
	(AC_CHECK_FUNCS): Add `raise'.

	* Makefile.in (inp.o): No longer depends on quotearg.h.

	* common.h (outfile): New decl (was private var named `output').
	(invc): New decl.
	(GENERIC_OBJECT): Renamed from VOID.
	(NULL_DEVICE, TTY_DEVICE): New macros.

	* patch.c (output): Remove; renamed to `outfile' and moved to common.h.
	(main): `failed' is count, not boolean.
	Say "Skipping patch." when deciding to skip patch.
	(get_some_switches): Set invc when setting inname.

	* inp.c: Do not include <quotearg.h>.
	(SCCSPREFIX, GET, GET_LOCKED, SCCSDIFF1, SCCSDIFF2, SCCSDIFF3,
	RCSSUFFIX, CHECKOUT, CHECKOUT_LOCKED, RCSDIFF1, RCSDIFF2):
	Move to util.c.
	(get_input_file): Invoke new functions version_controller and
	version_get to simplify this code.
	(plan_b): "/dev/tty" -> NULL_DEVICE

	* pch.h (pch_timestamp): New decl.
	* pch.c (p_timestamp): New var; takes over from global timestamp array.
	(pch_timestamp): New function to export p_timestamp.
	(there_is_another_patch): Use blander wording when you can't intuit
	the file name.
	Say "Skipping patch." when deciding to skip patch.
	(intuit_diff_type): Look for version-controlled but nonexistent files
	when intuiting file names; set invc accordingly.
	Ignore Index: line if either old or new line is present, and if
	POSIXLY_CORRECT is not set.
	(do_ed_script): Flush stdout before invoking popen, since it may
	send output to stdout.

	* util.h (version_controller, version_get): New decls.
	* util.c: Include <quotearg.h> earlier.
	(raise): New macro, if ! HAVE_RAISE.
	(move_file): Create empty unreadable file when backing up a nonexistent
	file.
	(DEV_NULL): New constant.
	(SCCSPREFIX, GET. GET_LOCKED, SCCSDIFF1, SCCSDIFF2,
 	RCSSUFFIX, CHECKOUT, CHECKOUT_LOCKED, RCSDIFF1): Moved here from inp.c.
	(version_controller, version_get): New functions.
	(ask): Look only at /dev/tty for answers; and when standard output is
	not a terminal and ! posixly_correct, don't even look there.
	Remove unnecessary fflushes of stdout.
	(ok_to_reverse): Say "Skipping patch." when deciding to skip patch..
	(sigs): SIGPIPE might not be defined.
	(exit_with_signal): Use `raise' instead of `kill'.
	(systemic): fflush stdout before invoking subsidiary command.

	* patch.man: Document recent changes.
	Add "COMPATIBILITY ISSUES" section.

	* NEWS: New COMPATIBILITY ISSUES for man page.
	Changed verbosity when fuzz is found.
	File name intuition is changed, again.
	Backups are made unreadable when the file did not exist.

	* pc/djgpp/config.h (HAVE_STRUCT_UTIMBUF): Define.
	(HAVE_RAISE): New macro.
	(HAVE_UTIME_H): Define.
	(TZ_is_unset): Do not define; it's not a serious problem with `patch'
	to have TZ be unset in DOS.

1997-06-08  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.6.
	(AC_CHECK_HEADERS): Add utime.h.
	* acconfig.h, configure.in, pc/djgpp/config.h (HAVE_STRUCT_UTIMBUF):
 	New macro.
	* pc/djgpp/config.h (HAVE_UTIME_H, TZ_is_unset): New macros.

	* NEWS, patch.man: Describe new -Z, -T options, new numeric
 	option for -G, retired -G, and more verbose default behavior
 	with fuzz.

	* pch.c (intuit_diff_type): Record times reported for files in headers.
	Remove head_says_nonexistent[x], since it's now equivalent to
	!timestamp[x].
	* util.h (fetchname): Change argument head_says_nonexistent to
 	timestamp.
	* util.c: #include <partime.h> for TM_LOCAL_ZONE.
	Don't include <time.h> since common.h now includes it.
	(ok_to_reverse): noreverse and batch cases now output regardless of
	verbosity.
	(fetchname): Change argument head_says_nonexistent to pstamp, and
	store header timestamp into *pstamp.
	If -T or -Z option is given, match time stamps more precisely.
	(ask): Remove unnecessary close of ttyfd.
	When there is no terminal at all, output a newline to make the
	output look nicer.  After reporting EOF, flush stdout;
	when an input error, report the error type.

	* inp.c (get_input_file):
	Ask user whether to get file if patch_get is negative.

	* Makefile.in (clean): Don't clean */*.o; clean core* and *core.

1997-06-04  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.5.

	* util.c (ok_to_reverse):
	Be less chatty if verbosity is SILENT and we don't
	have to ask the user.  If force is nonzero, apply the patch anyway.

	* pch.c (there_is_another_patch):
	Before skipping rest of patch, skip to
	the patch start, so that another_hunk can skip it properly.
	(intuit_diff_type): Slight wording change for missing headers, to
	regularize with other diagnostics.  Fix off-by-one error when setting
	p_input_line when scanning the first hunk to check for deleted files.

1997-06-03  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.4.

	* NEWS: Now matches more generously against nonexistent or empty files.

	* pch.c (there_is_another_patch): Move warning about not being
	able to intuit file names here from skip_to.
	(intuit_diff_type): Fatal error if we find a headless unified
	or context diff.

	* util.c (ask): Null-terminate buffer properly even if it grew.
	(fetchname): No need to test for null first argument.

1997-06-02  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.3.
	* pch.c (p_says_nonexistent, pch_says_nonexistent): Is now 1 for empty,
	2 for nonexistent.
	(intuit_diff_type): Set p_says_nonexistent according to new meaning.
	Treat empty files like nonexistent files when reversing.
	(skip_to): Output better diagnostic when we can't intuit a file name.
	* patch.c (main):
	Count bytes, not lines, when testing whether a file is empty,
	since it may contain only non-newline chars.
	pch_says_nonexistent now returns 2 for nonexistent files.

1997-06-01  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.2.
	* pch.c (open_patch_file):
	Fix bug when computing size of patch read from a pipe.

1997-05-30  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.3.1.

	* Makefile.in (transform, patch_name): New vars,
	for proper implementation of AC_ARG_PROGRAM.
	(install, uninstall): Use them.
	(install-strip): New rule.
	* pc/djgpp/config.sed (program_transform_name): Set to empty.

1997-05-30  Paul Eggert  <[e-mail]>

	* configure.in (VERSION), NEWS: Version 2.3 released.
	* patch.man: Fix two font typos.
	* util.c (doprogram): Fix misspelled decl.

1997-05-26  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.2.93.

	* pch.c (open_patch_file):
	Fatal error if binary_transput and stdin is a tty.

	* pc/djgpp/config.sed (chdirsaf.c):
	Use sed instead of cp, since cp might not be installed.
	* pc/djgpp/configure.bat:
	Prepend %srcdir% to pathname of config.sed, for crosscompiles.

1997-05-25  Paul Eggert  <[e-mail]>

	* configure.in (VERSION): Bump to 2.2.92.
	(D_INO_IN_DIRENT): New macro.
	* pc/djgpp/config.h, acconfig.h (D_INO_IN_DIRENT): New macro.
	* backupfile.c (REAL_DIR_ENTRY):
	Depend on D_INO_IN_DIRENT, not _POSIX_VERSION.

	* addext.c (addext): Adjust slen when adjusting s for DOS 8.3 limit.
	Do not use xxx.h -> xxxh~ hack.

	* util.c: (move_file): Avoid makedirs test when possible even
 	if FILESYSTEM_PREFIX_LEN (p) is nonzero.  Don't play
 	case-changing tricks to come up with backup file name; it's
 	not portable to case-insensitive file systems.
	* common.h (ISLOWER): Remove.

	* inp.c (scan_input): Don't use Plan A if (debug & 16).

	* patch.c (shortopts): Add -g, -G.
	(longopts): --help now maps to 132, not 'h', to avoid confusion.
	(get_some_switches): Likewise.
	Don't invoke setmode on input if --binary; wait until needed.
	Don't ever invoke setmode on stdout.