changelog.0

一个开放源代码的 AT&T 的 Korn Shell 的复制品, 支持大多数 ksh89 的特性。

	  with an argument (POSIX); deleted cargp argument to parse_args().
	* main.c(main): print error if -c and no arguments left.

	* lex.h(SSTDIN): new define.
	* lex.c(yylex): added case for SSTDIN.
	* main.c(main): if -s flag used, set source type to SSTDIN.

Tue Sep 27 08:52:11 NDT 1994 Michael Rendell ([e-mail])

	* lex.c(get_brace_var): new function.
	* lex.c(yylex): removed most ${..} parsing - leave it to expand();
	  use get_brace_var() to read the variable part of a ${..} expression.
	* tree.c(tputs,wdscan): case OSUBST: delete code that understood
	  partially compiled ${..}.
	* sh.h(C_SUBOP,C_SUBOP1,C_SUBOP2): changed C_SUBOP to C_SUBOP1,
	  added C_SUBOP2.
	* misc.c(initctypes): removed # and % from C_SUBOP; changed C_SUBOP to
	  C_SUBOP1; added C_SUBOP2.
	* eval.c(varsub): look at word part of substitution to figure out
	  type of substitution; check for bad substitutions; check for unset
	  variables for #/% substitutions.
	* eval.c(struct SubType): changed type field to stype; changed quote
	  field to short; added f field.
	* tree.h(DOTEMP_): new define.
	* eval.c(expand): case CSUBST: case '=': deleted bad substitution
	  error (now handled in varsub); case OSUBST: removed special handling
	  of trimming - varsub() does it now; when pushing/poping state (st),
	  save/restore value of f; set f to DOPAT when trimming; case CSUBST:
	  case '=': restore original position in string, substitute the value
	  of the variable (as opposed to the value that was assigned to the
	  variable); case OSUBST: if '?' qualifier, turn off DOBLANK when
	  expandined word part; define DOTEMP_ when expanding word part
	  of ${..[#%=?]..}; deleted first_eq and tstart - replaced with
	  tilde_ok and saw_eq.

	* eval.c(expand): tilde expansion: use tstart variable instead of cp;
	  changed '?' error message to be like at&t ksh; don't test if strval()
	  returns NULL - it doesn't.

	* var.c(strval): if !ISSET, instead of returning null, set s to null.

	* exec.c(comexec): case TDBRACKET: don't pass DOASNTILDE to evalstr().

	* exec.c(scriptexec): changed line[] to buf[] so it doesn't get
	  confused with global the line[].

	* main.c(initsubs): initialize PS4.
	* edit.c(x_getc): cast char to unsigned before returning.

Mon Sep 26 11:06:55 NDT 1994 Michael Rendell ([e-mail])

	* eval.c(globit): call strnsave instead of strsave; if file has
	  trailing /, use stat() to check that it is a directory.

	* eval.c(expand): case CSUBST: case #/%: deleted duplicate *dp = 0;
	  case CSUBST: case =: copy string and call debunk() to oust MAGICs.

	* misc.c(print_value_quoted): deleted bogus shf_shlout argument to
	  shprintf(); deleted unneeded test (p != s).

	* main.c(main): turn on FBRACEEXPAND.
	* misc.c(change_flag): turn FBRACEEXPAND off if turning FPOSIX on.

	* vi.c(x_vi): use x_vi_zotc() to print ^D.
	* vi.c(CHAR_LEN): new define.
	* vi.c(vi_hook): use CHAR_LEN() instead of inline tests for
	  c < ' ' || c== 0x7f; search editing: display M- if necessary.
	* vi.c(display): changed to deal tiwh meta-characters.

	* vi.c(x_vi_zotc): print M- for meta chars.
	* emacs.c(x_e_getc): new function; changed all x_getc() calls to
	  x_e_getc() calls.
	* edit.c(x_getc): don't and out upper bit.

	* sh.h(OPAREN,CPAREN,OBRACK,CBRACK,OBRACE,CBRACE): new defines
	* expr.c(OPAREN,CPAREN): re-named to OPEN_PAREN, CLOSE_PAREN.

	* eval.c(debunk): changed to convert MAGIC MAGIC -> MAGIC.
	* eval.c(expand): removed ismagic_bracket stuff - not needed.
	* eval.c(expand): always restore value of quote when CSUBST
	  reached; don't set DOGLOB in fdo if trimming.

Sat Sep 24 11:46:03 NDT 1994 Michael Rendell ([e-mail])

	* tree.h(DOBRACE_): new define.
	* eval.c(expand): changed check for leading ! in [..] to be more
	  robust (old test could have looked before start of string).
	* eval.c(expand,maybe_expand_tilde): case ~: moved code into a function
	  (maybe_expand_tilde).
	* eval.c(expand): expand alternations after macros, before globing
	  (was before macros).
	* eval.c(alt_expand): changed to be called after macro expansion.
	* eval.c(alt_scan,alt_count): deleted (no longer needed).

	* misc.c(cclass): return NULL (no match) if first char in a range
	  is greater than the second.
	* eval.c(expand): when building strings, stuff literal MAGIC chars.

Thu Sep 22 15:05:48 NDT 1994 Michael Rendell ([e-mail])

	* exec.c(comexec): re-arranged handling of builtin and exec;
	  handle command (and command -p, etc.); deleted comexec_flags
	  variable; made function static again; removed fcflags argument.
	* table.h(FC_NOBLOCK): deleted define.
	* c_sh.c(c_exec): changed empty function to deal with preserving I/O
	  redirects (code taken from comexec()).
	* c_ksh.c(c_command): new function - calls c_whence.
	* c_ksh.c(c_whence): removed code to deal with command -p.

	* Makefile.in: changed [ to test.
	* shf.h: changed errno structure member to errno_; changed all uses
	  (fixes for QNX from Brian Campbell).

	* c_test.c(enum Op): deleted trailing comma (some compilers complain).
	* proto.h: added volatile to tp arg of comexec() prototype.

Thu Sep 22 11:08:31 NDT 1994 Michael Rendell ([e-mail])

	* made pdksh-5.0.8 distribution

	* Makefile.in(install): added missing dollar (fix from Thomas Gellekum).

	* emacs.c: changed CMASK to CHARMASK to avoid conflicts with some
	  system headers (eg, HP-UX 9.01 <sys/param.h>).  Reported by Sean
	  Hogan.

	* history.c(c_fc): wp not being incremented; -e strcmp() test reversed
	  (reported by Sean Hogan).

Thu Sep 21 21:12:03 NDT 1994 Michael Rendell ([e-mail])

	* made pdksh-5.0.7 distribution

Tue Sep 20 09:56:54 NDT 1994 Michael Rendell ([e-mail])

	* history.c(c_fc): use ksh_getopt() to parse arguments.
	* c_ksh.c(c_bind): use ksh_getopt() to parse arguments.

	* main.c(initcoms[]): changed hash alias from alias -t - to alias -t --.

	* misc.c(print_value_quoted): don't use quotes if no special
	  characters.

	* c_ksh.c(c_whence): added POSIX command command.

	* c_sh.c(c_label): removed check for null wp.

	* exec.c(comexec): added new flags argument (FC_*);
	  don't call newblock() if FC_NOBLOCK set; pass flags on to
	  findcom(); changed all calls; made comexc() a non-static
	  function.

	* table.h:(FC_SPECBI,FC_FUNC,FC_REGBI,FC_UNREGBI,FC_PATH,FC_DEFPATH,
	  FC_NOAUTOLOAD,FC_NOBLOCK): new defines.
	* exec.c(findcom): merged insert/justsearch/autoload arguments
	  into one flags argument; changed code to check various flags;
	  changed all calls.

Sat Sep 17 20:17:59 NDT 1994 Michael Rendell ([e-mail])

	* exec.c(comexec): print error if builtin has no command.

	* exec.c(execute): before doing redirections, check for TCOM and
	  evaluate arguments and determine if it is a special builtin;
	  print arguments (using PS4) if FXTRACE set; case TCOM: simply call
	  comexec().
	* exec.c(comexec): deleted vp argument; only call newblock() if
	  needed (ie, !special, !empty); evaluate assignments and put
	  in environment one at a time; print environment (using PS4) if
	  FXTRACE set; removed code to turn empty command into :;
	  removed environment setting code in switch statement.
	* exec.c(echo): deleted function.

	* lex.c(yylex): only honour CMDWORD if FPOSIX set.

	* c_sh.c(shbuiltins): removed = attribute from false/true commands.

	* sh.h(E_TCOM): delete define - not used.

	* sh.h(null),var.c: use EXTERN for initialization of null.
	* sh.h(space,newline,slash): new variables (" ", "\n", "/")
	  use these everwhere instead of "", " ", "\n", "/".
	* path.c: include sh.h.

	* exec.c(execute): combined TFOR/TSELECT cases.

Fri Sep 16 11:32:01 NDT 1994 Michael Rendell ([e-mail])

	* lex.h(CMDWORD): new define to prevent continued alias expansion in
	  non-command contexts.
	* lex.c(yylex): only set ALIAS if SF_ALIAS and CMDWORD are set.
	* syn.c(get_command): case LWORD/REDIR: pass CMDWORD if argc is 0.

	* exec.c(comexec): if there is no command, do assignments and set
	  the return value to subst_exstat (used to fake a : command).

	* sh.h(subst_exstat): new variable.
	* exec.c(execute): case TCOM: clear subst_exstat before doing eval()s.
	* eval.c(expand): set subst_exstat to return value of waitlast().
	* c_sh.c(c_set): if !FPOSIX, return subst_exstat instead of 0.

	* exec.c(execute): removed redundent "exstat = rv;" near if FERREXIT.
	* exec.c(comexec): case CFUNC: for normal function completion, set
	  i to 0 and rv to return value of execute() (was i=LRETURN,exstat=..).

	* main.c(include): return -1 if file could not be found/opened,
	  otherwise, the exit status of the last command is returned;
	  changed all calls.
	* c_sh.c(c_dot): print error if include() returns < 0.

	* var.c(setspec): ifdef EDIT'd V_VISUAL, V_EDITOR cases.

	* misc.c(parse_args): no longer accept set -o alternations as
	  a substitute for set -o braceexpand.

	* jobs.c(j_exit): when restoring tty process group, also restore
	  our process group.

	* config.h.bot: define JOB_SIGS iff we have modern signal and wait
	  routines.
	* jobs.c: use ifdef JOB_SIGS instead of ifdef JOBS when setting
	  signal masks and routines or using waitpid; define TTY_PGRP and
	  NEED_PGRP_SYNC separately from JOBS.
	* jobs.c(j_kill): only send SIGCONT if job is stopped.
	* jobs.c(j_jobs): remove exited/signaled jobs even if !FMONITOR,
	  un-ifdef JOBS same.

	* jobs.c(check_job): ifdef FNOTIFY with JOBS (noted by
	  Michael Haardt <[e-mail]>).
	* jobs.c(j_notify,j_waitj): put ifdef JOBS around use of FMONITOR.
	* main.c(shell): removed ifdef JOBS from declaration of interactive.

	* ksh_limval.h,sh.h: moved include of <limits.h> from ksh_limval.h
	  to sh.h since some machines define CLK_TCK there.

Thu Sep 15 09:58:14 NDT 1994 Michael Rendell ([e-mail])

	* vi.c(vi_cmd): took out ESC as file completion char in command mode
	  (too annoying).

	* jobs.c(exchild): if starting a job in the background and FBGNICE
	  is set, call nice().

	* Makefile.in: changed maxext to manext (fix from Thomas Gellekum
	  <[e-mail]>); in the install target, check
	  if the path of the installed shell is in /etc/shells and
	  complain if it isn't; added depend target, removed old $(OBJS)
	  and trap.o dependencies.

Wed Sep 14 09:39:55 NDT 1994 Michael Rendell ([e-mail])

	* misc.c(options[]): changed position of vi-tabcomplete option.

	* lex.c(yylex): ifdef use of FVI/FEMACS/FGMACES with VI/EMACS
	  (fix from Gordan Larson <[e-mail]>).

	* ksh.1(DESCRIPTION): added missing P in \fP
	  (fix from Gordan Larson <[e-mail]>).

Tue Sep 13 11:01:47 NDT 1994 Michael Rendell ([e-mail])

	* made pdksh-5.0.6 distribution

Mon Sep 12 11:39:07 NDT 1994 Michael Rendell ([e-mail])

	* exec.c(scriptexec): changed so it will compile if SHARPBANG is
	  defined; fixed error message; shell argument is everything up to
	  a newline; don't listen to #! line unless it ends in a newline.

	* syn.c(get_command): case FOR: changed VARASN to ARRAYVAR.

	* jobs.c(waitfor): restore signal mask before returning if named job
	  isn't own own; when waiting for unspecified jobs, only consider
	  running jobs; don't pass JW_STOPPEDWAIT flag to j_wait.

	* table.h(V_TMPDIR,tmpdir): new define/variable.
	* var.c(setspec, unsetspec): added case for V_TMPDIR.
	* io.c(maketemp): use tmpdir variable if it is set, else use /tmp.

	* var.c(popblock): if poping a variable that wasn't set in the old
	  environment, call unsetspec().

Fri Sep  9 10:37:18 NDT 1994 Michael Rendell ([e-mail])

	* sh.h(PATHMAX): increased value from 256 to 1024.

	* main.c(main): moved initialization of name to start of main;
	  if getcwd() fails, use name in error message and call shf_flush().

	* io.c(maketemp): check/use TMPDIR variable instead of /tmp; allocate
	  temp structure and path in one chunk.

	* c_ksh.c(c_cd): when checking for no home directory, compare
	  against null, not (char *) 0.

Thu Sep  8 10:52:59 NDT 1994 Michael Rendell ([e-mail])

	* lex.c(yylex): case SHIST: flush shl_out after printing command.

	* jobs.c(check_job): when notifing, do not remove job if it is stopped.

Wed Sep  7 10:55:35 NDT 1994 Michael Rendell ([e-mail])

	* made pdksh-5.0.5 distribution

	* main.c(shell): commented out shf_flush(shl_out) - shouldn't be
	  needed since -v flushes itself.

Tue Sep  6 09:30:57 NDT 1994 Michael Rendell ([e-mail])

	* sh.h(LSHELL,really_exit): new define/variable.
	* c_sh.c(c_exitreturn): if how is LEXIT, check if there are stopped
	  jobs and, if so, unwind with LSHELL (also check/set really_exit).
	* main.c(shell): added case for LSHELL - stop unwinding if shell
	  is interactive; changed local reallyquit to global really_exit.
	* main.c(include),exec.c(comexec): added case for LSHELL.

	* c_sh.c(c_exitreturn): quitenv() for LRETURN as well as LEXIT.

	* sh.h(TF_CHANGED): new define.
	* trap.c(runtrap): default EXIT/ERR trap during execution and restore
	  original if TF_CHANGED not set.
	* trap.c(settrap): set TF_CHANGED when setting trap.

	* jobs.c(j_stopped): check that job created by current process; print
	  "You have stopped jobs" message.
	* main.c(shell): don't print you have stopped jobs message.

	* main.c(initcoms): removed echo alias.
	* c_ksh.c(kshbuiltins): added echo as a builtin.
	* c_ksh.c(c_print): if wp[0] is echo, act like strict sysv echo;
	  added \a (BEL) escape sequence.

	* syn.c(function_body): new function; calls get_command() to get
	  the body of a function (old code did nested { } block which
	  caused problems with how redirections after the block were
	  handled).
	* syn.c(get_command): call function body to deal with foo() and
	  function foo.

	* jobs.c(res