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1690 Commits

Author SHA1 Message Date
Stephen Heumann
6d5e65b9df Fix corruption and hanging resulting from using _exit in forked processes by calling QuitGS directly instead. 
GNO's _exit (contrary to its man page) does clean-up for stuff like the memory allocator, which is inappropriate in a forked child process and leads to hangs and crashes.
 2014-11-09 18:49:58 -06:00
Stephen Heumann
b3a419646b Changes to handle the use of \r as newline on the IIgs. 2014-11-08 19:58:11 -06:00
Stephen Heumann
c8de71ae9d Changes so that hush can successfully re-execute itself: 
*initialize the "environ" variable
*Reduce the stack size to 8192 (This should still be further reduced based on analysis of usage.)
 2014-11-08 18:03:25 -06:00
Stephen Heumann
bff0844d44 Add code to get the path of the current executable, which we need to re-execute the shell. 
On the GS, this uses GS/OS calls. Versions for OS X and Linux are also included.
 2014-11-07 23:06:34 -06:00
Stephen Heumann
6bd3b140ea Misc. fixes related to file handling: 
*Use .null instead of /dev/null
*Account for GNO's dup2(), which non-standardly returns 0 on success
*Always call open with appropriate number of arguments
*Use STDIN_FILENO instead of (implicitly) 0
 2014-11-07 19:23:04 -06:00
Stephen Heumann
cae994bc22 Add an emulation of waitpid that should be better than the one in libc. 
In particular, it will buffer information about children other than the one being waited for, so it isn't lost. It can also emulate a non-blocking wait by arranging to interrupt the wait with a signal.
 2014-11-07 12:12:18 -06:00
Stephen Heumann
9bc48e5ebf Add synchronization to prevent the parent from running concurrently with the child until the child execs or terminates. 
Our approach is to have the parent wait for SIGUSR2, and send that from the child just before it calls exec* or _exit.
 2014-11-06 23:29:42 -06:00
Stephen Heumann
f52d5394bf Change code using 0/1/2 for stdin/stdout/stderr file descriptors to use macros instead, to properly deal with their different numbers on GNO. 2014-11-06 18:14:15 -06:00
Stephen Heumann
3b1d003ea7 Handle globals more simply, declaring the "G" structure containing them directly in shell/hush.c. 
This allows the "G" struct to show up in the debugger, so it can easily be inspected.
 2014-11-06 13:08:38 -06:00
Stephen Heumann
9320c1e704 Set things up so hush can be build with debug code turned on. 
This involved breaking things up into more segments in debug mode, since the code is larger. I also had to remove some unused extern definitions, which were causing link errors when debug code was enabled.

To enable debug code, pass "DEBUG=1" to make or build.gs.
 2014-11-06 11:42:17 -06:00
Stephen Heumann
a3426d2782 Remove C99isms in hush debug code to address compilation errors when debugging stuff enabled. 2014-11-05 23:28:24 -06:00
Stephen Heumann
2669183517 Define segments and make other adjustments in makefile. 
At this point, hush can successfully build and run, although it doesn't work correctly.

The main Makefile is now dedicated to the GNO build. There's now a separate makefile for building on modern systems with GCC/Clang.
 2014-11-05 22:26:33 -06:00
Stephen Heumann
77ded3c27c Use databank pragma around forked child entry methods, as required to ensure correct behavior. 2014-11-05 19:02:03 -06:00
Stephen Heumann
c7f9c18893 Use GNO job control calls in place of unavailable POSIX ones. 2014-11-05 15:28:59 -06:00
Stephen Heumann
a3c32aaa73 Revise terminal control code to use ioctls supported by GNO instead of termios calls that aren't supported. 2014-11-04 19:53:40 -06:00
Stephen Heumann
a60c64d6c7 Replace call to sigsuspend() (not in GNO) with sigpause(). 2014-11-04 15:41:05 -06:00
Stephen Heumann
42c6e9e095 Replace alloca usages with malloc in shell/glob.c. 2014-11-04 11:46:36 -06:00
Stephen Heumann
cbdfea4c97 Revise signal handling to work with GNO. 
This involved using signal() rather than sigaction(), which GNO doesn't have. signal() doesn't have the signal-blocking feature of sigaction(), but I've tried to emulate it.
 2014-11-04 10:45:28 -06:00
Stephen Heumann
036b92595c Address some link errors with various small changes. 
The most significant change is to at use malloc instead of alloca in the code to evaluate shell arithmetic expressions in shell/math.c.
 2014-11-03 23:29:34 -06:00
Stephen Heumann
9850090331 Use STDERR_FILENO rather than 2 in debug print statements, so they'll properly go to stderr on GNO. 2014-11-03 19:20:20 -06:00
Stephen Heumann
488a238ad7 Add an implementation of poll() written in terms of select(), to work around the lack of poll() on GNO. 
This is a BSD-licensed poll() implementation by Brian M. Clapper. Its performance characteristics aren't as good as a "native" poll() would be, but this shouldn't be a problem in practice.
 2014-11-03 12:26:43 -06:00
Stephen Heumann
051b79efc1 Move all the source files to 15-character ProDOS-compatible file names. 
Dmake gets confused if you use over-15-character file names, so they needed to be shortened to get it to work. While I was at it, I also switched _ to . in the filenames so they're fully ProDOS compatible.

The shell/hush_test directory (not needed to build the code) still uses ProDOS-incompatible file names.
 2014-11-02 22:11:07 -06:00
Stephen Heumann
d4b2c3ce8b Various changes for GNO and ORCA/C compatibility. 2014-11-02 18:30:31 -06:00
Stephen Heumann
875b1bbd0e More GNO and ORCA/C compatibility fixes. 
Everything in the shell directory now compiles.
 2014-11-01 18:25:21 -05:00
Stephen Heumann
2464399542 Convert additional vfork calls to xvfork_and_run. 2014-11-01 16:59:17 -05:00
Stephen Heumann
d7a6168aa1 ORCA/C compat fixes. Variables must be at beginning of block. 2014-11-01 16:07:30 -05:00
Stephen Heumann
3577d48e74 Change the ARRAY_SIZE macro to work around an ORCA/C limitation. 2014-11-01 15:47:17 -05:00
Stephen Heumann
2b0d727f39 Include glob implementation from dietlibc. 
GNO doesn't actually implement glob, although it has a header for it. The GNO header is from an old BSD version and is missing some constants we need, so don't use it.
 2014-11-01 14:27:52 -05:00
Stephen Heumann
f6c7fdc027 GNO/ORCA compatiblity: remove final comma in enums, and appropriately define stuff that GNO doesn't have in platform.h. 2014-11-01 14:22:47 -05:00
Stephen Heumann
3709307794 Get rid of varargs macros in hush.c. 2014-11-01 11:25:19 -05:00
Stephen Heumann
8f6869ae25 Miscellaneous changes for ORCA/C and GNO compatibility, mainly removing C99isms. 
At this point, ORCA/C can process the main header files, and some smaller source files compile without errors.
 2014-11-01 09:46:02 -05:00
Stephen Heumann
b7676499be More removal of stuff that used long longs 2014-10-27 19:45:38 -05:00
Stephen Heumann
6c2c9d8865 Get rid of long longs in the the hush code (but not yet in the libraries) 2014-10-27 14:09:00 -05:00
Stephen Heumann
16c89af688 Change vfork calls to use vfork_and_run operation with GNO-compatible semantics 2014-10-27 13:10:11 -05:00
Stephen Heumann
e61b4040ec Make char unsigned, as busybox is designed for (and as ORCA/C does) 2014-10-27 00:48:59 -05:00
Stephen Heumann
a00ca4770f Eliminate or disable all the warnings given by clang -Wall 2014-10-26 23:30:51 -05:00
Stephen Heumann
472db3bd56 Delete the stuff that's irrelevant to hush. Also, include (a simplified version of) the autoconf-generated headers and a simple build script, so it can easily be build in the hush-only configuration. 2014-10-26 22:39:01 -05:00
Stephen Heumann
ef1a853400 Minimal changes to enable hush-only builds on OS X 2014-10-26 21:14:47 -05:00
Denys Vlasenko
07f7ea70ed ash: fix off-by-one in "jobs %4" handling. closes 7310 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-09-08 17:21:52 +02:00
Denys Vlasenko
2ec34969e7 ash: factor out ASH_HELP config option 
It used to be aliased to !FEATURE_SH_EXTRA_QUIET for ash,
while hush had it separate from FEATURE_SH_EXTRA_QUIET.

Bring ash in line with hush.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-09-08 16:52:39 +02:00
Denys Vlasenko
e9ab07c211 ash: make ${#var} unicode-aware 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-08-13 18:00:08 +02:00
Denys Vlasenko
841f8331d7 ash,hush: run reinit_unicode() only if makes sense 
With static Unicode support, no need to check $LANG et al.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-08-13 10:09:49 +02:00
Denys Vlasenko
c538d5bcc3 hush: make ${#var} unicode-aware 
This mimics bash

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-08-13 09:57:44 +02:00
Bartosz Golaszewski
5d2e409ef8 libbb: use a wrapper around sysconf(_SC_CLK_TCK) to save a few bytes 
function                                             old     new   delta
bb_sc_clk_tck                                          -      10     +10
timescmd                                             118     113      -5
print_route                                         1763    1758      -5
mpstat_main                                         1288    1283      -5
iostat_main                                         1947    1942      -5
INET_setroute                                        879     871      -8
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/5 up/down: 10/-28)            Total: -18 bytes
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-06-22 14:01:13 +02:00
Denys Vlasenko
3fa97af7cc ash,hush: set $HOSTNAME is bash compat. Closes 7028 
function                                             old     new   delta
hush_main                                           1056    1128     +72
ash_main                                            1442    1487     +45

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-04-15 11:43:29 +02:00
Denys Vlasenko
109ee5d336 ash: make "locak VAR" unset VAR (bash does that) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-03-16 18:41:11 +01:00
Denys Vlasenko
ac03a40cba ash,hush: fix a thinko about 2^64-1 factorization 
function                                             old     new   delta
next_random                                          113     119      +6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-03-15 09:25:46 +01:00
Denys Vlasenko
2bba591991 hush: make "true" built-in 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-03-14 12:43:57 +01:00
Denys Vlasenko
f93187512d random: cosmetic tweaks in debug code 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-03-13 13:03:27 +01:00
Denys Vlasenko
fb183076a3 ash,hush: improve randomness of $RANDOM, add easy-ish way to test it 
function                                             old     new   delta
next_random                                           68     113     +45
change_random                                        103     121     +18

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-03-13 12:52:43 +01:00