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freebsd-skq/bin/sh
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Jilles Tjoelker caf29fab8c sh: Use vfork in a few common cases. 
This uses vfork() for simple commands and command substitutions containing a
single simple command, invoking an external program under certain conditions
(no redirections or variable assignments, non-interactive shell, no job
control). These restrictions limit the amount of code executed in a vforked
child.

There is a large speedup (for example 35%) in microbenchmarks. The
difference in buildkernel is smaller (for example 0.5%) but still
statistically significant. See
http://lists.freebsd.org/pipermail/freebsd-hackers/2012-January/037581.html
for some numbers.

The use of vfork() can be disabled by setting a variable named
SH_DISABLE_VFORK.
2012-02-04 23:12:14 +00:00
..
bltin
sh: Fix duplicate prototypes for builtins.
2011-06-13 21:03:27 +00:00
funcs
sh: Remove "kill" example function, which is superseded by the kill builtin
2012-01-21 20:39:17 +00:00
alias.c
sh: Fix duplicate prototypes for builtins.
2011-06-13 21:03:27 +00:00
alias.h
sh: Fix duplicate prototypes for builtins.
2011-06-13 21:03:27 +00:00
arith_yacc.c
Add prototypes, ANSIfy functions definitions to reduce WARNS=6 output.
2012-01-25 08:42:19 +00:00
arith_yacc.h
sh: Import arithmetic expression code from dash.
2011-02-08 23:18:06 +00:00
arith_yylex.c
Add prototypes, ANSIfy functions definitions to reduce WARNS=6 output.
2012-01-25 08:42:19 +00:00
arith.h
sh: Fix duplicate prototypes for builtins.
2011-06-13 21:03:27 +00:00
builtins.def
sh: Remove the "exp" builtin.
2011-05-27 20:53:07 +00:00
cd.c
sh: Properly show "Not a directory" error in cd builtin.
2012-01-13 23:32:27 +00:00
cd.h
sh: Fix duplicate prototypes for builtins.
2011-06-13 21:03:27 +00:00
error.c
sh: Add a function to print warnings (with command name and newline).
2010-12-21 20:47:06 +00:00
error.h
sh: Allow EV_EXIT through function calls, make {...} <redir more consistent.
2011-04-23 22:28:56 +00:00
eval.c
sh: Use vfork in a few common cases.
2012-02-04 23:12:14 +00:00
eval.h
sh: Fix execution of multiple statements in a trap when evalskip is set
2012-01-16 11:07:46 +00:00
exec.c
Add prototypes, ANSIfy functions definitions to reduce WARNS=6 output.
2012-01-25 08:42:19 +00:00
exec.h
sh: Make various functions static.
2012-01-01 22:17:12 +00:00
expand.c
sh: Make various functions static.
2012-01-01 22:17:12 +00:00
expand.h
sh: Make various functions static.
2012-01-01 22:17:12 +00:00
histedit.c
Add prototypes, ANSIfy functions definitions to reduce WARNS=6 output.
2012-01-25 08:42:19 +00:00
init.h
sh: Remove special code for shell scripts without magic number.
2011-02-04 22:47:55 +00:00
input.c
sh: Change input buffer size from 1023 to 1024.
2012-01-14 22:46:18 +00:00
input.h
sh: Make various functions static.
2012-01-01 22:17:12 +00:00
jobs.c
sh: Use vfork in a few common cases.
2012-02-04 23:12:14 +00:00
jobs.h
sh: Use vfork in a few common cases.
2012-02-04 23:12:14 +00:00
mail.c
Consistently use "STATIC" for all functions in order to be able to set
2010-10-13 04:01:01 +00:00
mail.h
…
main.c
sh: Make various functions static.
2012-01-01 22:17:12 +00:00
main.h
sh: Make various functions static.
2012-01-01 22:17:12 +00:00
Makefile
sh: Import arithmetic expression code from dash.
2011-02-08 23:18:06 +00:00
memalloc.c
sh: Follow-up to r216743, grabstackblock() can be replaced with stalloc().
2011-01-09 22:47:58 +00:00
memalloc.h
sh: Follow-up to r216743, grabstackblock() can be replaced with stalloc().
2011-01-09 22:47:58 +00:00
miscbltin.c
sh: Minor optimization to output from ulimit/export/readonly.
2011-05-15 22:09:27 +00:00
mkbuiltins
sh: Fix duplicate prototypes for builtins.
2011-06-13 21:03:27 +00:00
mkinit.c
Remove duplicated header files
2011-06-24 07:29:04 +00:00
mknodes.c
sh: Fix crash with empty functions (f() { }) introduced in r196483
2009-08-28 22:41:25 +00:00
mksyntax.c
sh: Allow quoting ^ and ] in bracket expressions.
2011-12-28 23:51:17 +00:00
mktokens
sh: Add case statement fallthrough (with ';&' instead of ';;').
2011-06-17 13:03:49 +00:00
myhistedit.h
sh: Make various functions static.
2012-01-01 22:17:12 +00:00
mystring.c
sh: Remove unused function scopyn().
2012-01-01 22:15:38 +00:00
mystring.h
sh: Remove unused function scopyn().
2012-01-01 22:15:38 +00:00
nodes.c.pat
In the spirit of r90111, depend on c89 and remove the "STATIC" macro
2010-10-13 22:18:03 +00:00
nodetypes
sh: Remove special support for background simple commands.
2011-06-18 23:58:59 +00:00
options.c
sh: Allow unsetting OPTIND.
2011-11-20 21:48:50 +00:00
options.h
sh: Add do-nothing -h option.
2011-06-18 23:43:28 +00:00
output.c
sh: Use vsnprintf() rather than crafting our own in fmtstr().
2010-12-11 17:47:27 +00:00
output.h
sh: Code size optimizations to buffered output.
2010-11-20 14:14:52 +00:00
parser.c
sh: Remove special support for background simple commands.
2011-06-18 23:58:59 +00:00
parser.h
sh: Do parameter expansion before printing PS4 (set -x).
2011-06-09 23:12:23 +00:00
redir.c
sh: Remove special code for shell scripts without magic number.
2011-02-04 22:47:55 +00:00
redir.h
…
sh.1
sh(1): Improve documentation of field splitting.
2011-11-05 21:56:45 +00:00
shell.h
sh: Detect dividing the smallest integer by -1.
2011-02-12 23:44:05 +00:00
show.c
In the spirit of r90111, depend on c89 and remove the "STATIC" macro
2010-10-13 22:18:03 +00:00
show.h
sh: Constify various strings.
2009-12-24 18:41:14 +00:00
TOUR
sh: Various updates to the TOUR document.
2011-05-27 16:00:37 +00:00
trap.c
sh: Fix execution of multiple statements in a trap when evalskip is set
2012-01-16 11:07:46 +00:00
trap.h
sh: Fix duplicate prototypes for builtins.
2011-06-13 21:03:27 +00:00
var.c
sh: Use vfork in a few common cases.
2012-02-04 23:12:14 +00:00
var.h
sh: Use vfork in a few common cases.
2012-02-04 23:12:14 +00:00