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Ron Yorston a1b0d3856d ash: add process substitution in bash-compatibility mode 
Process substitution is a Korn shell feature that's also available
in bash and some other shells.  This patch implements process
substitution in ash when ASH_BASH_COMPAT is enabled.

function                                             old     new   delta
argstr                                              1386    1522    +136
strtodest                                              -      52     +52
readtoken1                                          3346    3392     +46
.rodata                                           183206  183250     +44
unwindredir                                            -      28     +28
cmdloop                                              365     372      +7
static.spclchars                                      10      12      +2
cmdputs                                              380     367     -13
exitreset                                             86      69     -17
evalcommand                                         1754    1737     -17
varvalue                                             675     634     -41
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 5/4 up/down: 315/-88)           Total: 227 bytes
   text	   data	    bss	    dec	    hex	filename
 953967	   4219	   1904	 960090	  ea65a	busybox_old
 954192	   4219	   1904	 960315	  ea73b	busybox_unstripped

v2: Replace array of file descriptors with a linked list.
    Include tests that were unaccountably omitted from v1.
v3: Update linked list code to the intended version.
v4: Change order of conditional code in cmdputs().
v5: Use existing popredir() mechanism to manage file descriptors.
v6: Rebase to latest version of BusyBox ash.  Reduce code churn.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-06-05 23:37:19 +02:00
..
.gitignore ash: allow shell scripts to be embedded in the binary 2018-11-01 10:15:13 +01:00
applet_metadata.h applet_tables: do not include libbb.h, that header ir for target builds 2011-03-28 01:23:38 +02:00
applets.h.sh modprobe-small: make applets individually selectable 2016-12-23 15:13:16 +01:00
applets.src.h Tweaks to build process for embedded scripts 2018-11-27 10:38:10 +01:00
ar_.h archival: avoid std namespace for local includes 2020-11-16 13:24:24 +01:00
bb_archive.h libarchive: treat one "FIXME: avoid seek" 2019-05-24 17:03:28 +02:00
bb_e2fs_defs.h Whitespace fixes 2013-07-30 11:52:58 +02:00
busybox.h config: disentangle PREFER_APPLETS from SH_STANDALONE and SH_NOFORK 2016-07-22 18:48:38 +02:00
dump.h od: unbreak it 2020-10-25 23:44:22 +01:00
fix_u32.h
grp_.h libpwdgrp: use FAST_FUNC to make "matching ABI" optimization more likely to succeed 2015-01-02 22:31:07 +01:00
inet_common.h
libbb.h runsv: robustify signal handling - SIGTERM to child between vfork and exec could mess things up 2021-06-05 16:20:05 +02:00
liblzo_interface.h lzop: code shrink 2018-02-01 01:41:31 +01:00
platform.h ash: add process substitution in bash-compatibility mode 2021-06-05 23:37:19 +02:00
pwd_.h libpwdgrp: use getpwent() instead of getpwent_r() 2015-02-07 21:21:02 +01:00
rtc_.h move ADJTIME_PATH define to header files 2020-12-17 20:53:43 +01:00
shadow_.h libpwdgrp: use FAST_FUNC to make "matching ABI" optimization more likely to succeed 2015-01-02 22:31:07 +01:00
unicode.h
usage.src.h move ADJTIME_PATH define to header files 2020-12-17 20:53:43 +01:00
volume_id.h blkid: if parameters are given, do not scan /dev 2012-03-03 15:09:07 +01:00
xatonum.h udhcp: finish support of classless static routes 2011-12-16 17:05:52 +01:00
xregex.h