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Denys Vlasenko 9c46a06885 shell: update HISTFILESIZE code to be actually useful 
"HISTFILESIZE=0" in profile wasn't working as intended,
"unset HISTFILE" wasn't preventing creation of history files
Now:
HISTSIZE=n      allows to reduce in-memory history buffer
HISTFILESIZE=n  allows to reduce history file size (0: truncate it)
unset HISTFILE  allows to not save history file at all

function                                             old     new   delta
exitshell                                            138     194     +56
hush_exit                                             97     143     +46
save_history                                         266     296     +30
hush_main                                           1170    1186     +16
.rodata                                           105762  105771      +9
load_history                                         246     254      +8
size_from_HISTFILESIZE                                44      41      -3
read_line_input                                     2746    2712     -34
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 6/2 up/down: 165/-37)           Total: 128 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2025-07-03 19:10:42 +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: remove duplicate forward declaration 2021-11-28 10:53:22 +01:00
bb_e2fs_defs.h lsattr: support more ext2 flags 2021-06-20 12:34:05 +02:00
busybox.h config: disentangle PREFER_APPLETS from SH_STANDALONE and SH_NOFORK 2016-07-22 18:48:38 +02:00
dump.h libbb/dump: make xxd_displayoff member conditional on xxd 2023-05-27 14:52:17 +02:00
fix_u32.h *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
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 more thorough fix for systems with strange socklen_t 2010-02-02 12:45:38 +01:00
libbb.h shell: update HISTFILESIZE code to be actually useful 2025-07-03 19:10:42 +02:00
liblzo_interface.h lzop: code shrink 2018-02-01 01:41:31 +01:00
platform.h *: slap on a few ALIGN* where appropriate 2022-02-06 19:53:10 +01:00
pwd_.h libpwdgrp: use getpwent() instead of getpwent_r() 2015-02-07 21:21:02 +01:00
rtc_.h hwclock: add get/set parameters option 2023-07-12 16:27:49 +02:00
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 ash,hush: recheck LANG before every line input 2011-03-23 17:59:27 +01:00
usage.src.h httpd,telnetd: make default port configurable 2021-09-09 21:42:48 +02:00
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 *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00