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busybox/libbb
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Avi Halachmi 0fd5dbba8f lineedit: improve multiline PS1 - redraw using last PS1 line. Closes 10381 
This patch only affects prompts with newlines.

We redraw the prompt [+ input] occasionally, e.g. during tab completion,
history browsing or search, etc, and we expect it to align with prior
redraws, such that the visible effect is that only the input changes.

With multi-line PS1, redraw always printed the prompt some lines below
the old one, which resulted in terminal scroll during every redraw.

Now we only redraw the last PS1 line, so vertical alignment is easier to
manage (we already calculated it using only the last line, but re-drew
all lines - that was the culprit), which fixes those extra scrolls.

Notes:
- We now use the full prompt for the initial draw, after clear-screen (^L),
  and after tab-completion choices are displayed. Everything else now
  redraws using the last/sole prompt line.

- During terminal resize we now only redraw the last[/sole] prompt line,
  which is arguably better because it's hard to do right (and we never did).

- Good side effect for reverse-i-search: its prompt now replaces only the
  last line of the original prompt - like other shells do.

function                                             old     new   delta
put_prompt_custom                                      -      66     +66
draw_custom                                            -      66     +66
parse_and_put_prompt                                 766     806     +40
read_line_input                                     3867    3884     +17
input_tab                                           1069    1076      +7
cmdedit_setwidth                                      61      63      +2
redraw                                                59      47     -12
put_prompt                                            46       -     -46
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 4/1 up/down: 198/-58)           Total: 140 bytes

Signed-off-by: Avi Halachmi <avihpit@yahoo.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-12 18:26:13 +02:00
..
appletlib.c whitespace and comment format fixes, no code changes 2017-10-05 15:19:25 +02:00
ask_confirmation.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
auto_string.c libbb: auto_string() for efficient handling of temporary malloced stirngs 2015-10-09 17:59:56 +02:00
bb_askpass.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
bb_bswap_64.c
bb_cat.c fix errors found with make_single_applets.sh 2017-04-12 15:48:19 +02:00
bb_do_delay.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
bb_getgroups.c libbb: new function bb_getgroups() - allocating wrapper around getgroups() 2017-07-04 18:56:45 +02:00
bb_pwd.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
bb_qsort.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
bb_strtod.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
bb_strtonum.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
bbunit.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
capability.c run-init: new applet 2017-08-21 19:30:01 +02:00
change_identity.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
chomp.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
common_bufsiz.c config: deindent all help texts 2017-07-21 09:50:55 +02:00
compare_string_array.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
concat_path_file.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
concat_subpath_file.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
Config.src config: trim/improve item names and help texts. 2017-07-27 02:59:13 +02:00
copy_file.c libarchive: do not extract unsafe symlinks unless $EXTRACT_UNSAFE_SYMLINKS=1 2017-08-10 11:52:42 +02:00
copyfd.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
correct_password.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
crc32.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
default_error_retval.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
device_open.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
die_if_bad_username.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
dump.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
endofname.c move endofname() to libbb 2013-02-26 00:36:53 +01:00
executable.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
fclose_nonstdin.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
fflush_stdout_and_exit.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
fgets_str.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
find_mount_point.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
find_pid_by_name.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
find_root_device.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
full_write.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
get_console.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
get_cpu_count.c
get_last_path_component.c
get_line_from_file.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
get_shell_name.c mark get_shell_name FAST_FUNC 2012-10-03 09:42:21 +02:00
get_volsize.c
getopt32.c hush: GETOPT_RESET() _after_ getopts too. 2017-08-29 14:32:17 +02:00
getopt_allopts.c getopt32: factor out code to treat all args as options 2017-08-04 16:33:23 +02:00
getpty.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
hash_md5_sha.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
hash_md5prime.c tls: add 2nd cipher_id, TLS_RSA_WITH_AES_128_CBC_SHA, so far it doesn't work 2017-01-24 16:00:54 +01:00
herror_msg.c
human_readable.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
in_ether.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
inet_cksum.c inet_cksum: big-endian fix 2011-09-08 10:59:26 +02:00
inet_common.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
inode_hash.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
isdirectory.c do not include <sys/stat.h> just before "libbb.h", it's there already 2017-10-05 14:41:36 +02:00
isqrt.c libbb: move isqrt from factor, use it in diff too 2017-04-11 07:34:56 +02:00
Kbuild.src getopt32: factor out code to treat all args as options 2017-08-04 16:33:23 +02:00
kernel_version.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
last_char_is.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
lineedit_ptr_hack.c
lineedit.c lineedit: improve multiline PS1 - redraw using last PS1 line. Closes 10381 2017-10-12 18:26:13 +02:00
llist.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
logenv.c zcip: Add environment variable for overriding log functionality 2014-11-04 12:19:04 +01:00
login.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
loop.c mount: create loop devices with LO_FLAGS_AUTOCLEAR flag 2017-03-16 16:55:47 +01:00
make_directory.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
makedev.c
match_fstype.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
messages.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
missing_syscalls.c Resolve linker issues with Android API 21 (dprintf, tcdrain) 2015-12-17 16:42:41 +01:00
mode_string.c do not include <sys/stat.h> just before "libbb.h", it's there already 2017-10-05 14:41:36 +02:00
mtab.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
nuke_str.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
obscure.c unit-tests: implement the unit-testing framework 2014-06-22 16:30:41 +02:00
parse_config.c getopt32: remove opt_complementary 2017-08-08 21:55:02 +02:00
parse_mode.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
percent_decode.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
perror_msg.c
perror_nomsg_and_die.c
perror_nomsg.c
pidfile.c
platform.c Bionic lacks ttyname_r; provide a workaround 2015-04-25 21:32:48 +02:00
print_flags.c whitespace and comment format fixes, no code changes 2017-10-05 15:33:28 +02:00
print_numbered_lines.c cat: fix "cat -An" ignoring -n; make numbering go througn all files 2017-07-14 10:47:18 +02:00
printable_string.c libbb: auto_string() for efficient handling of temporary malloced stirngs 2015-10-09 17:59:56 +02:00
printable.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
process_escape_sequence.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
procps.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
progress.c do not use `a' quoting style in comments 2017-08-02 14:26:33 +02:00
ptr_to_globals.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
pw_encrypt_des.c do not use `a' quoting style in comments 2017-08-02 14:26:33 +02:00
pw_encrypt_md5.c fix assorted unused code and wrong format specs found by cppchekc (bug 6716) 2013-11-29 16:43:33 +01:00
pw_encrypt_sha.c tls: add 2nd cipher_id, TLS_RSA_WITH_AES_128_CBC_SHA, so far it doesn't work 2017-01-24 16:00:54 +01:00
pw_encrypt.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
read_key.c lineedit: fix handling of repeating Alt-b, Alt-f, Alt-d, Alt-Backspace 2016-11-24 15:04:00 +01:00
read_printf.c libbb: remove unnecessary argument to nonblock_immune_read 2015-04-20 13:41:32 +02:00
read.c
README
recursive_action.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
remove_file.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
replace.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
rtc.c libbb: introduce and use is_prefixed_with() 2015-03-12 17:48:34 +01:00
run_shell.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
safe_gethostname.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
safe_poll.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
safe_strncpy.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
safe_write.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
securetty.c libbb: fix "error: redefinition of 'is_tty_secure'" 2017-04-13 17:55:05 +02:00
selinux_common.c whitespace cleanup. no code changes 2013-01-14 15:57:44 +01:00
setup_environment.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
signals.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
simplify_path.c
single_argv.c
skip_whitespace.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
speed_table.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
str_tolower.c
strrstr.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
sysconf.c libbb: add sanity check in bb_arg_max() 2014-12-24 01:46:29 +01:00
time.c libbb: fix time parsing of [[CC]YY]MMDDhhmm[.SS]. Closes 8951 2016-05-31 02:50:54 +02:00
trim.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
u_signal_names.c regularize format of source file headers, no code changes 2017-09-18 16:28:43 +02:00
ubi.c ubi tools: ubiupdatevol supports "-" input and actually respects -s SIZE 2017-08-07 16:00:25 +02:00
udp_io.c libbb:/send_to_from: do not require that "to" should have the same AF. Closes 9146 2016-09-15 13:20:51 +02:00
unicode.c lineedit: improve Unicode handling (still buggy though) 2013-08-19 16:44:05 +02:00
update_passwd.c fix breakage found by mass one-applet builds 2016-12-23 02:42:26 +01:00
utmp.c *: Switch to POSIX utmpx API 2015-04-02 23:03:46 +02:00
uuencode.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
verror_msg.c libbb: speed up error_msg functions 2016-04-03 16:55:03 +02:00
vfork_daemon_rexec.c getopt32: remove opt_complementary 2017-08-08 21:55:02 +02:00
warn_ignoring_args.c
wfopen_input.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
wfopen.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
write.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xatonum_template.c whitespace fixes. no code changes 2013-01-15 13:58:01 +01:00
xatonum.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xconnect.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xfunc_die.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xfuncs_printf.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xfuncs.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xgetcwd.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xgethostbyname.c
xreadlink.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xrealloc_vector.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00
xregcomp.c whitespace and comment format fixes, no code changes 2017-10-05 14:40:24 +02:00

README 

Please see the LICENSE file for copyright information (GPLv2)

libbb is BusyBox's utility library.  All of this stuff used to be stuffed into
a single file named utility.c.  When I split utility.c to create libbb, some of
the very oldest stuff ended up without their original copyright and licensing
information (which is now lost in the mists of time).  If you see something
that you wrote that is mis-attributed, do let me know so we can fix that up.

	Erik Andersen
	<andersen@codepoet.org>