changelog.0

实战Linux编程的原代码,希望对学驱动的人能有所帮助

	From Bruce Evans.

Fri Sep 11 00:25:52 1992  David J. MacKenzie  ([e-mail])

	* echo.c, echo.1: New files.

Thu Sep 10 18:42:44 1992  David J. MacKenzie  ([e-mail])

	* pathchk.c (main): Don't strip trailing slashes from args;
	they might make a path invalid.
	(portable_chars_only, dir_ok): New functions.
	(validate_path): Renamed from validate_new_path.
	Call them.  Don't complain if a leading
	dir doesn't exist.  Don't replace `parent' with a dir that
	doesn't exist.  Don't print a message when falling back
	from pathconf to constant values.

	* who.c [!UTMP_FILE]: If _PATH_UTMP is defined, use it instead
	of /etc/utmp.  From Marc Boucher <[e-mail]>.

Tue Aug 25 17:02:25 1992  David J. MacKenzie  ([e-mail])

	* Version 1.7.

	* groups.sh, nohup.sh: Add $(bindir) to front of path.

Mon Aug 24 16:39:39 1992  David J. MacKenzie  ([e-mail])

	* stty.c: make sane value for "min" 1, not 0.
	From [e-mail] (Bruno Haible).

Sun Aug 23 03:02:07 1992  David J. MacKenzie  ([e-mail])

	* id.c, test.c: Use NGROUPS_MAX if it's defined.  386BSD is like sun.

Sat Aug 22 03:16:41 1992  David J. MacKenzie  ([e-mail])

	* test.c: Rename STANDALONE to TEST_STANDALONE to avoid IBM RT
	ACIS sys/param.h conflict.

	* su.c (correct_password) [HAVE_SHADOW_H]: Try to get the
	encrypted correct password from the shadow password file.

Fri Jul 17 15:25:01 1992  David J. MacKenzie  ([e-mail])

	* su.c, getusershell.c: New files.

Fri Jul  3 15:08:43 1992  David J. MacKenzie  ([e-mail])

	* stty.c, who.c: Change FOO_MISSING to HAVE_FOO.

Fri Jun  5 01:49:29 1992  David J. MacKenzie  ([e-mail])

	* strcspn.c: New file.

	* expr.c: Misc. cleanups.

	* expr.c (eval7): Renamed from eval6.
	Give syntax error if no more args.  Don't coerce all values to numbers.
	(eval6): New function.
	(eval5): Accept == as a synonym for =.
	(eval2): Coerce values to numbers for comparisons.
	Above all from Dana Jacobsen ([e-mail]).

Thu Jun  4 19:32:09 1992  David J. MacKenzie  ([e-mail])

	* printf.c (print_formatted): Move main loop into new function.
	(main): Add an outer loop to use the format multiple times.
	(verify): Don't reject a completely empty string.
	Check errno (for overflow).

	* false.sh, true.sh: New programs.  Oh, boy.

Thu May 14 01:17:22 1992  David J. MacKenzie  ([e-mail])

	* stty.c (set_mode): Support crt and dec modes partially if
	necessary, so they work on, for example, Ultrix . . . .

Wed May 13 14:47:45 1992  David J. MacKenzie  ([e-mail])

	* stty.c (set_mode): Swap nl and -nl.  Have them also affect
	output as well as input.

Tue May 12 00:07:28 1992  David J. MacKenzie  ([e-mail])

	* date.c (show_date): Use strftime for the whole conversion.

Tue May  5 15:20:24 1992  David J. MacKenzie  (djm@hal)

	* stty.c (wrapf): Print the formatted buffer; don't redo the
	formatting using vprintf.

Thu Apr 30 01:17:08 1992  David J. MacKenzie  ([e-mail])

	* printf.c (xstrtol, xstrtoul, xstrtod, verify): New functions.
	(main, print_direc): Use them.  Make error messages more specific.

	* tee.c (tee): Only malloc and free the table of file descriptors
	if >0 files are given.

Fri Apr 17 11:56:48 1992  David J. MacKenzie  ([e-mail])

	* pathchk.c (validate_new_path): Print the name of the component that
	failed the length test, not the whole path.
	From Andreas Schwab ([e-mail]).

Mon Apr  6 15:11:36 1992  David J. MacKenzie  ([e-mail])

	* who.c (read_utmp): Check close return for error.
	(print_heading): Align columns based on sizes of utmp members.
	(who_am_i): Skip past /dev/ instead of skipping leading path.

Mon Mar 16 23:47:03 1992  David J. MacKenzie  ([e-mail])

	* date.c (show_date): Don't call strftime if FORMAT is the
	empty string.

	* date.c (main): Reorganize to reduce duplicated code.
	Add -d option.
	(usage): Document -d.
	(set_date): Function removed.

Tue Feb 11 16:12:18 1992  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* printf.c (print_esc): When a numeric escape is given,
	don't call print_esc_char, and return 1 less.
	From Thorston Ohl.

Mon Jan 20 02:17:18 1992  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* Version 1.6.

	* test.c: HAVE_MULTIPLE_GROUPS -> HAVE_GETGROUPS, for bash 1.11.

Fri Jan 17 15:46:18 1992  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* expr.c (docolon): Use re_nsub to find the number of
	subexpressions . . . From Karl Berry, who knows.

Wed Dec 25 23:27:53 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* expr.c (docolon): Use the new way (re_regs.num_regs > 0) to find
	out if there were any subexpressions, instead of the old way
	(re_regs.start[1] >= 0), which can cause random memory
	accesses with regex 0.1.  From Brian Matthews.

Tue Dec 24 02:12:15 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* system.h, id.c, pathchk.c, tee.c: Change POSIX ifdefs to
	HAVE_UNISTD_H and _POSIX_VERSION.

Wed Dec 11 13:15:09 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* Version 1.5.

	* expr.c (main): Set obscure_syntax to tell re_match to
	allocate memory for the group registers.

Mon Dec  9 16:03:14 1991  Charles Hannum  (mycroft at hal.gnu.ai.mit.edu)

	* who.c (list_entries): Check type == USER_PROCESS if defined, for SysV.

Sat Dec  7 00:32:02 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* Version 1.4.

	* env, id, nice, pathchk, stty, tee, tty, uname: Change usage
	messages and documentation to list long-named options starting
	with `--' rather than `+'.

	* env.c (main), nice.c (main): Simplify test for which exit
	status to use if exec fails.

Fri Dec  6 23:49:42 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* tee.c (main) [POSIX]:  Use sigaction instead of signal, which
	POSIX doesn't have.

Fri Oct 18 00:31:35 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* test.c (two_arguments): Fix from Chet.

	* expr.c: Include regex.h after sys/types.h, not before, so
	size_t gets defined.

	* test.c: New version, adapted from bash 1.10.

	* id.c: GID_T -> GETGROUPS_T, for clarity.

Sat Oct 12 14:38:34 1991  David J. MacKenzie  (djm at churchy.gnu.ai.mit.edu)

	* configure: Define uid_t and gid_t as int if they're not
	defined in sys/types.h.  That's probably right for old Unixes
	and avoids trying to find the C preprocessor.

Sat Sep 28 13:01:23 1991  David J. MacKenzie  (djm at churchy.gnu.ai.mit.edu)

	* stty.c (set_mode): Make `raw' and `cooked' not change parity
	and character size, which would probably make them useless on
	7-bit lines.
	Make `raw' set the `time' character to 0, not 1.
	From Bruce Evans.

	* nohup.sh: If creating nohup.out, give it mode 0600, for POSIX.

Fri Sep 13 14:59:51 1991  David J. MacKenzie  (djm at churchy.gnu.ai.mit.edu)

	* id.c [POSIX]: Always use sysconf to get NGROUPS_MAX.

Thu Aug 29 14:43:07 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* test.c: Don't include sys/file.h if POSIX.
	Use gid_t for getgroups.

	* stty.c (set_mode): Use CEOF and CEOL instead of hardcoding them.
	(display_speed): Fix a printf string type mismatch.
	From Bruce Evans.

Mon Aug 26 16:52:51 1991  David J. MacKenzie  (djm at pogo.gnu.ai.mit.edu)

	* configure, src/Makefile.in, lib/Makefile.in: Only put $< in
	Makefiles if VPATH is being used, because older makes don't
	understand it.

Mon Aug 19 01:57:46 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* Version 1.3.

Sat Aug 17 22:48:15 1991  David J. MacKenzie  (djm at geech.gnu.ai.mit.edu)

	* src/Makefile.in (install): Install a link to test called '['.

Wed Aug 14 12:22:57 1991  David J. MacKenzie  (djm at geech.gnu.ai.mit.edu)

	* test.c (unary_operator): Check first char of string, not its address.

Sun Aug 11 18:10:30 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* Version 1.2.

	* system.h: Define S_IFMT if needed, for test.c.

	* test.c: New file, from bash.

	* nice.c: Change +priority to +adjustment (more accurate).

Sat Aug 10 13:09:51 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* stty.c [WINSIZE_IN_PTEM]: sys/ptem.h requires sys/stream.h.

	* nice.c, configure: Use nice if available and setpriority is missing.

Thu Aug  8 01:34:05 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* date.c: USG needs TZ=GMT0 for UCT timezone, also.

	* stty.c: Add pass8 and litout modes.

Sun Aug  4 22:45:51 1991  David J. MacKenzie  (djm at wheat-chex)

	* Version 1.1.

Fri Aug  2 13:22:31 1991  David J. MacKenzie  (djm at apple-gunkies)

	* configure: Implement +srcdir.  Don't check for bison.

	* stty.c: Don't change ixon in "sane" mode.

	* configure: Use 1 instead of 255 for checking tzname,
	because of signedness.

Thu Aug  1 13:40:58 1991  David J. MacKenzie  (djm at apple-gunkies)

	* printenv.c (main): Don't print the variable names when given
	args, as people seem to use printenv in scripts after all . . . .

	* stty.c: Don't change parity or character size settings in
	"sane" mode.  The right values for those depend on the hardware.

Wed Jul 31 01:19:01 1991  David J. MacKenzie  (djm at hal)

	* stty.c [_AIX]: Include sys/ioctl.h -- needed on
	AIX to get window size.

Tue Jul 30 00:06:54 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* getdate.y: New file.
	* date.c: Add -s option to set date in English.
	* configure: Check for ftime.

	* date.c: Remove COMPUTE_TM_ZONE code, which didn't work.
	* configure: Instead of checking whether tzname is declared,
	check whether it exists.

	* logname.c (main): Go back to just printing an error message
	if getlogin fails, as required by POSIX.

	* stty.c (screen_columns, wrapf): New functions to implement
	output wrapping.
	Globally: use them.

	* configure: Define uid_t and gid_t if sys/types.h doesn't.
	* system.h: Define F_OK et al. if nothing else does.

Mon Jul 29 21:11:16 1991  David J. MacKenzie  (djm at wombat.gnu.ai.mit.edu)

	* pathchk.c (validate_new_path): Rearrange tests so that
	pathconf is only called on existing directories.  Use access
	instead of stat to determine directory searchability.
	From Jim Meyering.

	* stty.c, configure: Add WINSIZE_IN_PTEM and GWINSZ_BROKEN for SCO.

Wed Jul 24 02:13:31 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* stty.c (sane_mode): Always set control chars to sane values.
	Set min and time if they're different from eof and eol.

	* whoami.c: Print UID as unsigned.
	* logname.c: Do "whoami" if getlogin fails.

	* logname.c (main): fprintf was missing an arg.

Tue Jul 23 02:20:15 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* id.c: GID_T is int if ultrix as well as if sun.

	* stty.c: Implement raw and cooked modes.

Mon Jul 22 15:21:21 1991  David J. MacKenzie  (djm at wookumz.gnu.ai.mit.edu)

	* tee.c (main): close stdin and stdout to check for errors.

	* stty.c: Use tcflag_t for termios bitmasks.
	Use speed_t for speeds.  Use unsigned long for baud rates to
	accomodate large values, and support 57600 and 115200 if available.

	* date.c, configure: Instead of SIZE_T_MISSING,
	define size_t if it's missing.

	* id.c, whoami.c: Use uid_t and gid_t.

	* id.c: If POSIX and not sun (bogus!), pass getgroups and