GSH 2.0 UPDATES ^^^^^^^^^^^^^^^ Nov 26 99 [dmt] Cleanup tests directory and update its Makefile. Nov 22 99 [dmt] Add environment variable flags $ECHOX and $KEEPQUOTE that modify the behavior of gsh. [shellvar.asm, cmd.asm] If set, $ECHOX causes gsh to echo a single expanded command. (In previous versions of gsh 2.0, this was temporary code that was executed whenever $ECHO was set.) If set, $KEEPQUOTE tells gsh to use the user's original single and double quotes, rather than removing them and adding double quotes as needed. This resolves PR#50 and, if a child program re-parses its parameters, also resolves PR#34 (gsh messes up nested quotes). Nov 18 99 [dmt] Fix PR#123: command line parsing ended if a ";" delimited a null command (echo "Test 1" ; ; echo "Test2" would only echo the first string). Modified cmd.asm Sep 6 99 [dmt] Add comments to ioctl calls in edit.asm. Sep 1 99 [dmt] Added signal handler for SIGTTIN (signal #21, background read attempted from control terminal) that prints a message and quits the shell. This was needed because gsh will sometimes receive such a signal, go into the "suspended" state, and never return to "running" state. Feb 11 99 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d10 (displays as 2.0d?) Feb 2 99 [dmt] Changed maxline_size from 1024 to 4096. Recode copy loop in expandalias to be more efficient. Feb 1 99 [dmt] Change names of alloc1024 and free1024 to allocmaxline and freemaxline (many .asm files) in anticipation of changing the maximum line size from 1024. Reviewed all uses of 1024 constants, and changed appropriately to use new bufpool.asm location maxline_size. While reviewing 1024 constants, determined that shell.asm was using "buffer" for reads with max len of 1024, when it really had a size of 256. Changed "buffer" to "cmdline" and "1024" to "cmdbuflen". Removed definitions of buffer and wordbuf (each ds 256) from global data area, since they were unused. Jan 30 99 [dmt] Add check for output buffer overflow when globbing, and print error message (PR#110). Code restructured to use base address and offset, so that offset could easily be checked against limit. Also moved allocation/deallocation of two buffers outside a loop. (expand.asm) Add check for overflow when expanding variables (expand.asm) and allow command processor to recognize error (cmd.asm). Modify alias expansion not to treat "." as escaped character, to truly eat leading blanks (per comments), and to check for buffer overflow (alias.cmd). (Also tightened up the code.) Jan 13 99 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d9 Jan 12 99 [dmt] Add debug routine DB~CHKBNK, which causes BRK B0 if program bank is not the same as data bank (mmdebug.asm). Modify lock and unlock macros to call DB~CHKBNK (gsh.mac). Needed to change branch instructions to jump macros in several files because the code got larger. Jan 11 99 [dmt] Lock/unlock hashmutex in dispose_hash (hash.asm). Jan 3 99 [dmt] Allow five digits rather than four when printing process id number in the ps command (builtin.asm). Jan 1 99 [dmt] Piping the output of a command to a non-executable file caused gsh to hang. Instead of going directly to done after printing "Not executable" error message, go to chkpipe in invoke.asm. Dec 31 98 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d8 Dec 30 98 [dmt] Added mutual exclusion to ~NEW and ~DISPOSE macros. Lack of mutex could cause one fork to modify a memory table while another fork was searching it, leaving one or both processes in an infinite loop. This caused some recoding in nullfree (shellutil.mac), since we have to unlock the mutex after calling ~DISPOSE but before returning to the caller. Dec 29 98 [dmt] For some sizes of the hash table, the hash command would sometimes print an entry more than once. Made 2 changes to sv_colprint (in sv.asm): 1) Ensure the number of columns is never > number of entries. This is only a problem when there are fewer than 6 files hashed. 2) Never look beyond the number of entries stored in offtbl. Results could be affected by the previous call to sv_colprint. Dec 28 98 [dmt] Review code for mutual exclusion requirements. = Change jsl to builtin subroutine near "foundit" in builtin.asm into stack setup followed by rts, so that mutex is not required to protect the setup and execution of the invocation. = Add AliasMutex to protect data used by alias and unalias commands (alias.asm) = Remove pwdmutex from pwd command (builtin.asm). = Remove mutex from dotods routine (dir.asm). = Add DirMutex (for DirData) to dirs, pushd, and popd commands (dir.asm). = Add offtblmutex to sv_colprint routine (sv.asm). = Change ErrorGS and SetGS calls so that parameter blocks are on the stack for ShellExec (cmd.asm). = Add lock/unlock of hashmutex to search routine so that the hash function is protected. (hash.asm) Dec 27 98 [dmt] Running a process in the background from inside a script (not 'source', but executing the script as a command) caused the script to wait for that background process to end. Caused the script to run without waiting by checking for background processing near beginning of "infork" (invoke.asm). Because the parent process is the script, not gsh, when control returns to gsh the script has terminated and the parent process ID is 1 (null process). gsh cannot use its normal job control commands, except "kill " (not "kill %") works. Dec 26 98 [dmt] Make gsh globbing work more like csh: if none of the requested patterns are found, print "No match" and exit. Dec 23 98 [dmt] At startup, if /etc/glogin, $HOME/glogin, or $HOME/gshrc does not exist, skip "file not found" error message. (PR#100) Dec 21 98 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d7 Dec 20 98 [dmt] For calls to system(), if input pointer is null or lower level routines detect an error, return -1. This change caused change to internal routine execute(): return -1 rather than 0 when an error is detected. Detect when non-forked builtin or directory name as command is combined with piped I/O, and ensure that situation is properly cleaned up. (Formerly, "clear | cat > /tmp/list" would cause a nasty crash.) Dec 18 98 [dmt] In execute() (cmd.asm), when child process isn't active and has no entry in the pid list, assume that pchild() has already set $status rather than forcing $status to 0. Dec 17 98 [dmt] argv and argc parameters were reversed in PrintHistory(). This didn't make a difference until argc was checked for != 0. Dec 16 98 [dmt] Added waitstatus address parameters to command() and invoke() so completion status can be reported from unforked builtin commands. Added code in execute() to set status reported from unforked builtin commands. Reviewed all built-in commands to ensure they report 0 for no error and 1 for error. Fixed memory corruption error when edit command had no parameters (it called free1024 with random address). Added usage strings for tset, hash, commands, and history. Dec 13 98 [dmt] Resolved (or at least closed the window of opportunity on) defects reported in Oct. 6 and 10 entries. When a process terminated quickly [kill(pid,0) returned -1], that child's termination could interfere with detecting the next child's termination. Solution: Modify removejentry() (jobs.asm) to return 1 if entry is in list (indicating we expected status from it) and 0 if it isn't. Modify execute (cmd.asm) to get status via wait() if and only if removejobentry() returns 1. Previously, the following exec file often resulted in a hang: # Create exec file set tmpcmd=/tmp/testcmds echo "echo Sourcing $tmpcmd" > $tmpcmd echo "/bin/ps -l" >> $tmpcmd chtyp -l exec $tmpcmd # Source that file; usually doesn't return source $tmpcmd Dec 5 98 [dmt] If either glogin file rehashed (for login shells only), that hash table's memory pointer was overwritten but not deallocated in shell (shell.asm). Fixed by adding a call to dispose_hash before calling hashpath. Nov 29 98 [dmt] Fix memory leak: deallocate name returned by hash search in invoke (invoke.asm) and which (builtin.asm). Deallocate path string in invoke by passing it as a new parameter to argfree, so that it is deallocated only after the child process is done with it. Nov 28 98 [dmt] When allocating memory for return string containing full path in search (hash.asm), add lengths of path + name + 1 rather than path + 33. Nov 18 98 [dmt] Fix memory leak: when null command was encountered, the empty command line and argv array were not deallocated. Nov 12 98 [dmt] prefix command without parameters should not try to deallocate PRecPath, since it was not used. Causes corruption when PRecPath contains a value; fixed by jumping to done rather than finish. Also, jump into "allloop" earlier and avoid 9 lines of duplicate code. Nov 2 98 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d6 Oct 29 98 [dmt] Defect introduced into 2.0d5 fixed: when background job completed, GetCmdLine thought there was an error on stdin. It printed a bogus error message and then quit. Oct 26 98 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d5 Oct 10 98 [dmt] Found race condition: when forked process completes quickly, the parent process may not ever receive its completion signal. Fix: ensure process exists by calling kill(pid,0) and checking status before calling pwait (cmd.asm). Change calls to set and reset handler for signal 17 (SIGSTOP) to do it for signal 18 (SIGTSTP) (17 can't be caught; 18 is). Oct 7 98 [dmt] Check for directory stack full in pushd, and report new error message: 'pushd: Directory stack full'. (Previously, 50 pushds would cause a crash.) Check for parameter in pushd "+n" <=0, and report a new error message: 'pushd: Invalid number'. (Previously, tried to chdir to the parameter.) Oct 6 98 [dmt] Before calling pwait (to wait for child process) in cmd.asm, enable the child status signal handler; change it back to its previous state after the pwait call. This partially fixes the problem of the shell waiting forever when a shell exec file sources another exec file that contains a command that causes a fork. command() checked for argv==0 before calling invoke(), but invoke() also checks. Move invoke()'s error message ("specify a command before redirecting.") into command(). Sep 27 98 [dmt] Add quotes around null parameters on the command line so they are parsed by the target command (PR#84) Sep 25 98 [dmt] If a command appends to stdout (echo test >>&/tmp/err), then stdin gets closed. This was due to errappend being defined as pipefds+2 rather than pipefds+4 in cmd.asm. Sep 23 98 [dmt] If there is an error reading stdin, gsh would go into an infinite loop of beeping and requesting more input. Changed getchar (in stdio.asm) and GetCmdLine (in edit.asm) to report the error and terminate. Sep 9 98 [dmt] Output piped to an unfound command caused gsh to terminate. This was due to an interface change to getpgrp(2): it now returns the process group of the caller. To get the process group number of the parameter pid, the call has to be made to _getpgrp(2). This change was made in invoke.asm to fix the bug. Additional updates were made in jobs.asm. Sep 7 98 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d4 Sep 7 98 [dmt] In "gettoken" (cmd.asm), decrement buf (pointer to command line) when EOL is reached; otherwise if the character following the command in the buffer is non-zero, the garbage after the real command will be interpreted as another command. Test case: "> /tmp/list" would cause "not found" error message. Sep 6 98 [dmt] Added startup protocol as requested by Devin Reed (PR#78) and Steve Reeves (PR#85, PR#86): For login shells (command line starts with '-'), If $PATH doesn't start with ':' or contain a space, change all ":" to " ". source /etc/glogin source $HOME/glogin ($HOME/gshrc is sourced afterward for both login and non-login). In rehash built-in command, don't the print number of hashed until all initialization is completed. Restored commented-out PushVariablesGS at start of "shell" in shell.asm to keep subshells from changing parent's environment. Aug 4 98 [dmt] Fixed defects in wordmatch (edit.asm) related to recognizing commands versus filenames during tab and ctrl-D filename completion. Suppose there is a file "filename" in the current directory and you enter one of the following: command >& filen command >filen and press tab. Instead of getting filename completion, you would get a beep. In the first case, gsh thought the "&" was putting the command in the background and filen was the beginning of a command name rather than a filename. In the second, gsh included the ">" in the filename match pattern. Aug 3 98 [dmt] Entabbed all the asm files (saved >36,000 bytes). Aug 3 98 [dmt] Changes to this point checked-in to master archive. Released as version 2.0d3 Aug 2 98 [dmt] Remove alloc256/free256 and associated data. Replace with fixed 64-byte buffer for command filename (hash.asm) and allocation of 261-byte buffer via ~NEW for shell variable name (shellvar.asm). Aug 1 98 [dmt] Updated and expanded mmdebug.asm routines that perform error checking on memory management calls. Added macros ~NEW and ~DISPOSE that invoke either the real or debug routines. Fixed call to read $TERM variable's length (PR#81). Replace call to allocate256 in AppendHome (shell.asm) with code that allocates space for $HOME plus the string parameter. Jul 28 98 [dmt] In expandvars (expand.asm), use echoFlag=0 (not 1) for ReadLine. The characters are echoed as they are typed and do not need to be reprinted on stdout. Jul 27 98 [dmt] Added error checking to the various flavors of prefix: - Verify 2nd parameter is a valid directory before setting. - Verify 1st parameter < 32 before displaying or setting. Jul 26 98 [dmt] Removed last of old shell calls and calls to and code for p-string routines (p2cstr, c2pstr, c2pstr2, putp, errputp). Removed old shell macros and "str" from gsh.mac. In removing putp calls, found instances in pwd & prefix commands and prompt handler where current directory name was assumed to be < 256 characters; recoded to use new routine getpfxstr. Jul 21 98 [dmt] Changed invoke.asm to use RedirectGS instead of redirect. Changed popd (in dir.asm) to get length of prefix 0 before allocating its string, rather than assuming path is <= 256 characters. This allows directory stack to use very long names. Jul 20 98 [dmt] Changed expand.asm to use InitWildcardGS and NextWildcardGS instead of their obsolete counterparts. Jul 20 98 [dmt] Changes up to this point checked-in to master archive. Released as version 2.0d3 Jul 19 98 [dmt] Changed edit.asm to use ReadIndexedGS, InitWildcardGS, NextWildcardGS, instead of their obsolete counterparts. Jul 18 98 [dmt] Changed Set_Variable, Export, UnsetVariable in cmd.asm, shellvar.asm, jobs.asm, and term.asm to use new shell interface (SetGS, ExportGS, UnsetVariableGS). In InitTerm (term.asm), do not set TERM to gnocon if it is already set. Jul 17 98 [dmt] Changed final Read_Variable call (in edit.asm) to use getenv instead. Changed ReadVariableGS calls in hash.asm and builtin.asm to also use getenv. Jul 16 98 [dmt] Changed Read_Variable calls in history.asm and prompt.asm to use getenv instead. Jul 15 98 [dmt] Changed getenv (shellutil.asm) to use ReadVariableGS instead of Read_Variable to get value. getenv's input parameter is now a pointer to a GS/OS string (not a C-string), and it returns a pointer to a GS/OS result buffer with a terminating null byte added. This interface change affected calls to getenv in orca.asm and term.asm. Jul 14 98 [dmt] Changed expandvars (expand.asm) to use ReadVariableGS to get the value of an environment variable, allowing values over 256 characters in length. Jul 13 98 [dmt] Rewrote shellvar.asm to use newer shell calls to access environment variables, so that they can be > 256 characters. Combined set and setenv into the same routine, with different entry points. Jul 12 98 [dmt] In rehash command (hash.asm), read the PATH environment variable with ReadVariableGS instead of Read_Variable, allowing detection of true length and total length > 256 (PR # 9). Jul 9 98 [dmt] Removed the df command (from builtin.asm). Defined macro incad to increment a 4-byte address, checking for overflow; replaced instances of "inc ptr" with "incad ptr". Jul 8 98 [dmt] Changed column offset table to use a 1-word rather than 1-byte entry. This resolves PR#14 (hash wouldn't print beyond first 256 filenames). Jul 7 98 [dmt] Fixed defect in unalias (alias.asm) where the double quote portion of the scanner would look for a terminating single quote. This resolves PR#69. Jul 5 98 [dmt] Changed default order for copying files in $PATH dirs into executable list, so earlier paths files are found first. Added environment variable flag $OLDPATHMODE to make gsh behave in the old (backwards order) way when necessary. Discard duplicate filenames when hashing. Fix PR#73: directory in $PATH with escaped space (\ ) is not searched. Needed to remove the "\" before sending pathname to ExpandPathGS. Jun 29 98 [dmt] Changes up to this point checked-in to master archive. Released as version 2.0d2 Jun 28 98 [dmt] Added InitVar routine to shellvar.asm to read values of all environment variables tracked in vardata. Jun 25 98 [dmt] Added 2.0 versions of shell calls to gsh.mac (e.g. ErrorGS, ReadVariableGS). Replaced old calls with new ones for the following: ERROR to ErrorGS in builtin.asm, cmd.asm dir.asm, shellvar.asm; Push[Pop]Variables to Push[Pop]VariabesGS in invoke.asm, shellvar.asm, shell.asm; ReadVariable to ReadVariableGS in builtin.asm and dir.asm. Jun 23 98 [dmt] Made clear built-in a non-forked command. Jun 21 98 [dmt] Added loop to execute(), in cmd.asm, to extract a single command from the input line before sending it to command(). It removes leading blanks and tabs and terminates the string at the first ";" or "#". After command() has finished, execute() loops again if the previous command was terminated with a ";". This change fixed both problems in bug report #12: a) All commands separated by ";" were evaluated before any were executed, so the following wouldn't work: set t_num=1 ; echo "Test number $t_num" b) Odd things randomly happened when tab was the first character of multiple consecutive lines. Jun 20 98 [dmt] Changed pointer arithmetic from dec or inc to adc or sbc to allow for boundary condition in shell.asm. In ShellExec (cmd.asm), save status from call to execute and pass back to caller in Accumulator. Modify table of builtins so that source is unforked; this fixes bug reports #7 and #8: prefix does not work from a sourced file. Jun 18 98 [dmt] In cmd.asm, modified system() to check for null pointer, since that is documented in the ORCA/C manual as legal. Jun 15 98 [dmt] Fixed bug report #3: when wildcards were expanded, if nothing was found gsh printed "No match." and terminated, even if there were more arguments to parse. Now gsh prints a message "No match: ignored" to stderr for each that does not match any filename. These changes were in expand.asm. Changed mutual exclusion in cmd.asm and shellvar.asm to use lock/unlock/key macros. That should be all of 'em. Jun 14 98 [dmt] Fixed bug report #47: when ~ is parsed and next character is a delimiter ("/" or ":") and first character of $HOME does not match that delimiter, replace the delimiters in $HOME to match the user's value. Changed three "ora addr" to "ora addr+2" (alias.asm: ora ptr; edit.asm and history.asm: ora cdcap). Changed mutual exclusion in expand.asm to use lock/unlock macros. Jun 13 98 [dmt] Wrote script to test built-in commands; found many that returned status=227. Updated exit, setdebug, ps, hash, commands, history, dirs, pushd, popd, jobs, fg, bg, and stop to return status of 0 (modified "return" to add "2:#0"). Jun 12 98 [dmt] Squeezed about 80 bytes out of orca.o (edit built-in), mainly by removing "invalid path name" error msg, since I couldn't force ExpandPath to report the error and the editor handles it fine. Also tightened "whileloop" by using Y-reg to index off of two pointers. Added lots of comments. Jun 10 98 [dmt] The boolean shell environment variables (echo, pushdsilent, etc.) would not work if they were set using UPPER CASE names. Added routine cmpdcstr in shellutil.asm to downshift characters while comparing two c strings, then called it from updatevars in shellvar.asm to compare env variable names. Jun 9 98 [dmt] Modified echo command (in builtin.asm) so it doesn't append a blank to the end of everything it prints. Added comments to code. Jun 8 98 [dmt] Added breakpoint option to setdebug (in builtin.asm) to allow turning on conditional brk instructions for debugging. Made "check4debug" a global word that reflects the current debug state, and added "breakpoint" macro (in gsh.mac) to generate code. Changed "2.0.4" to "2.0.6" within gnostr (in shell.asm). Jun 6 98 [dmt] All the macros were extracted, compared, and collated in alphabetical order into the file gsh.mac. Six macros used by other macros had to be moved to the end of the file. Added direct-page/stack data segment (size 2K) to main.asm. It is initialized to be filled with "?" characters, so that it can be examined to see how much space is being used. Jun 5 98 [dmt] Determined that the current sources have only two differences from the gsh distributed with GNO/2.0.4: In main.asm between (argloop and cmd3) the code ph4 #1024 jsl ~NEW formerly was pea 1024 jsl ~NEW In jobs.asm (after dokill) the error check after kill (pid,signum) was not present. Jun 1 98 [dmt] Changed to execvp to _execve in invoke.asm. gsh works! 24 Apr 98 [gdr] Fitted gsh sources into into GNO builds. While gsh assembles and links (abeit using the v2.0.4 termcap library), it does not currently run -- it just crashes. The changes that were made includes: - 'keep' lines were eliminated - the 'mcopy' now takes the macro from the /obj/gno/bin/gsh directory. This is in anticipation of having the macro files generated from a single source file; there is a large amount of duplication. For the moment, the makefile merely copies the old macro files from the "M" directory to the /obj/gno/bin/gsh directory. - start each file with a dummy routine so that the source code winds up in the *.o rather than the *.root file. - added the 'setcom 60' directive; there were many source lines that were otherwise getting truncated. 18 Nov 97 - [gdr] initial checkin into v2.0.6 repository. No changes were made to the sources. GSH 1.1 UPDATES ^^^^^^^^^^^^^^^ (unknown) - Removed two references to $E0C000 in shell.asm (signal handlers). Bad Timmy! 2/25/92 d01 - fixed a problem with the command-line aborting after certain built-ins are run. 4/03/92 d02 - .ttya and .ttyb are displayed as 'ta' and 'tb' respectively in 'ps'. - "USER" field has been renamed to "MMID" in 'ps'. d03 - removed all the extra newlines around 'There are stopped jobs' message. - 'exit' in a shell script aborts the script, instead of quitting gsh itself. - when getting a 'There are stopped jobs' message, a second attempt to exit the shell will result in all jobs being killed and the shell will exit. No commands may appear between the two attempts to exit. This is basically just like csh behaviour. d04 - motd pathname has been changed to '31:etc:motd' where 31 is the location of GNO, not the user directory. eventually motd will be removed from gsh and will be handled by login or something similar. 4/07/92 d05 - ^D and TAB expansion now properly works on */ boot prefix. 4/13/92 d06 - started work on new string vector library. - started new builtin - 'hash' to display all hashed files. Extremely preliminary. 4/14/92 d07 - 'hash' now uses string vectors to build the hash list for displaying - fixed a problem if no files were hashed. - sv_alloc now makes sure there is an extra null at the end of the allocated string vector. 4/20/92 d08 - 'which' puts the filename after the path for commands in the current directory. d09 - wrote a string vector function for printing the string vectors in columns like 'ls'. 'hash' now calls this. 4/21/92 d10 - wrote routine for sorting string vectors...'hash' now sorts the list... 4/23/92 d11 - full directory stack support!! pushd, popd, and dirs!! d12 - 'ps' displays 'nu' for the .null driver under TT field. 4/25/92 d13 - Added '-l' option to 'kill'. 6/22/92 d14 - Began writing custom stdio for the shell using GS/OS output. 6/23/92 - minor optimization to alias hashing. - finished stdout and stderr for gsh. d15 - history file is no longer deleted on gsh start-up - fixed '~' printer used in 'dirs'. /usr2/ was displayed as ~2 if $home was /usr. Looked real dumb :) and was incorrect. - optimizations to job control d16 - echo flushes the stdio when finished. 6/24/92 - fixed bug in system() call vector..make should work better now :) - added a newline after 'pwd'. - wrote 'edit' built-in. 6/26/92 d17 - began work on stdin for gsh. Uses GS/OS, ioctl(), etc... - began rewriting editor. Now uses key translation tables and command jump tables. - editor now accepts multiple character commands. 6/27/92 - further work on editor - started work on termcap support in gsh. most command-line editing uses termcap now. 6/28/92 - continued work on editor and termcap - 'clear' and 'echo' builtins now use termcap. - prompt now uses termcap. - hacked up a quick 'tset' builtin. - wrote keybinding function, termcap arrow keys now bound! - beta test release sent out 6/29/92 d18 - if alias 'precmd' is defined, it is executed before drawing each prompt. - if $pushdsilent is set, then directory stack not displayed after 'pushd' and 'popd'. - termcap optimizations for history mechanism in editor. - termcap optimizations for kill-line and kill-end-of-line. - fixed bug in overwrite mode of editor...required too many returns to end line -> rts's weren't being pulled off the stack :) 6/30/92 - fixed a bug in the 'which' command when displaying files in cwd. - the cursor is now left on when running applications. - added '-c' option to gsh command-line - wrote 'source' built-in 7/04/92 - fixed two bugs in prompt display code. 7/17/92 - fixed puts to not choke on NULL strings. 7/21/92 - Temporarily added Push/PopVariables to the code - ospeed is now set so that padding can be done by termcap. This fixed the dropped characters on my Xerox terminal when doing screen clears. - fixed a bug in 'tset'. Was doing a jsr instead of jsl. oops. - set term can be in gshrc w/o manually doing a tset now. - 'ps' now scans job list to find names of 'forked' processes. - 'ps' nows displays tty numbers, since the ttyname is set in 31/etc/ttys and not necessarily second-guessed by gsh. 7/25/92 - fixed cursor off problems. 8/26/92 d19 - larger number of builtins can be redirected or piped. - Open-Apple is now mapped to meta (ESC). - The editor tells gnocon to translate arrows into VT100 codes. - fixed editor bug clearing entire line. - wrote 'bindkey' built-in. 8/27/92 d20 - faster built-in searching. - wrote 'setenv' builtin. 8/28/92 - termcap optimizations to word completion - word completion now matches variables if word starts with '$'. 8/29/92 - only executuables are expanded if the word is a command. All files are expanded for arguments. 8/30/92 - words to complete no longer need to be separated with spaces, ';','|', and '&' are now also recognized. 9/01/92 - 'cd' no longer reports bad pathname syntax if $home not set. - 'pid' parsing now does syntax checking :) - kill won't allow killing process 0 - changed 'jobs' invocation from method 0 to method 1. - word completion will not occur if the word contains an '=', single quote or double quote. 9/03/92 - fixed memory trashing problem in 'source' 9/04/92 - 'ps' only displays processes with the users uid. Be sure to use login, or you'll be the kernel's uid and get to see all of the kernel's processes as your own. 9/10/92 - forgot to 'clc' when alias not found in 'alias foo'. 9/20/92 - fixed open-apple mapping - changed keyboard mapping - tab expands directories as the command - set problem with '-f' fixed 9/21/92 - fixed 'cd' with no arguments. - fixed 'set foo' and 'setenv foo'. - fixed bug again in 'cd'. - 'set' and 'setenv' list exported variable names in upper case - fixed a probelm in puts when passed a null pointer. - fixed pointer bug in '~' compactor - wrote 256 byte buffer pool 9/22/92 - fixed parsing bug when parsing two or more command-lines simultaneously. - wrote 1024 byte buffer pool. - word completion now matches built-ins - wordmatching ignores matches if the suffix is contained in the $fignore variable. 10/31/92 d21 - fixed bug in piping mechanism. 11/04/92 - fixed hashing problems. 11/17/92 - new builtin 'commands' lists all built-in commands. Try aliasing help to this for beginning users. 01/17/93 b01 - fixed prefix not printing correctly if zero length prefix. - word completion will expand to proper case. 01/20/93 b02 - removed motd printing from gsh 02/08/93 - fixed job control setting of terminal when background job completes. 02/09/93 - ^C & ^Z printing removed from the shell. The kernel will do this now. 02/17/93 b03 - gshrc is now read as '@:gshrc' 03/02/93 - 'set' automatically detects changing $term and auto-peforms a tset. manually typing 'tset' is no longer required though it is still included. - prompts can now contain \n,\r,\t,\b. 03/10/93 - updated automatic variable setting code. works faster now. - optimized low-level string routines 03/25/93 - fixed NULL commands aborting entire command-lines. 04/04/93 - history commands can now be greater than 256 characters, though when being read, they are clipped to 1024. - the history file location has been moved to '@:history' - if $ignoreeof is set, then EOF (^D) will not quit the shell. - %U and %u will start and end underlining in prompts. 04/22/93 b04 - 'df' displays device numbers - gsh now takes commands as command-line input. ie., 'gsh echo hello, world' will start gsh then gsh will run echo. - fixed a nasty shell script bug that basically rendered it useless. - fixed memory trashing in shell scripts. - fixed memory trashing in histories. 04/26/94 b05 - which no longers displays the command-name first.