GSH 2.0 UPDATES ^^^^^^^^^^^^^^^ 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. 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.