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Bartosz Golaszewski 8d75d794ea libbb: use sendfile() to copy data between file descriptors 
Busybox already uses sendfile in httpd. This patch proposes to use it
globally to copy data between file descriptors.

It speeds up the copying on slow systems a lot - below are the times needed
to copy a 450Mb file with and without this option enabled on a BeagleBone
Black:

sendfile:
user    0m0.000s
sys     0m8.170s

read/write 4k:
user    0m0.470s
sys     0m16.300s

function                                             old     new   delta
bb_full_fd_action                                    394     474     +80

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2014-11-27 23:31:58 +01:00
..
appletlib.c exit with 127 if appled name wasn't found - it's more POSIXy 2014-11-17 17:03:47 +01:00
ask_confirmation.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
bb_askpass.c libbb: fix bb_ask() to flush input before prompt, not after. Closes 7190 2014-07-01 13:20:22 +02:00
bb_bswap_64.c *: deinline SWAP_xE64 on 32-bit CPUs. Wins !90 bytes both on 32 and 64 bits 2010-10-18 11:40:26 +02:00
bb_do_delay.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
bb_pwd.c libbb: add sketch of tentative 'better' passwd/group API 2013-11-26 13:46:18 +01:00
bb_qsort.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
bb_strtod.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
bb_strtonum.c libbb/bb_strtonum: always set end ptr, even on error return 2011-12-22 13:00:32 +01:00
bbunit.c bbunit: fix WANT_TIMING compilation 2014-11-26 14:04:51 +01:00
change_identity.c
chomp.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
compare_string_array.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
concat_path_file.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
concat_subpath_file.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
Config.src sha3: make size/speed optimization decision configurable 2013-01-15 01:12:26 +01:00
copy_file.c Add conditional support for -v / --verbose 2014-05-19 16:23:50 +02:00
copyfd.c libbb: use sendfile() to copy data between file descriptors 2014-11-27 23:31:58 +01:00
correct_password.c ftpd: add optional support for authentication 2014-08-05 21:57:18 +02:00
crc32.c whitespace fixes 2011-02-03 00:05:48 +01:00
default_error_retval.c libbb: xfunc_error_retval can be a byte 2010-09-01 16:04:24 +02:00
device_open.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
die_if_bad_username.c die_if_bad_username: tighten up a bit 2011-08-09 04:05:13 +02:00
dump.c hexdump: don't unconditionally limit the usable address range 2013-03-27 15:15:33 +01:00
endofname.c move endofname() to libbb 2013-02-26 00:36:53 +01:00
executable.c libbb: rename execable -> executable. No code changes 2014-05-02 17:15:58 +02:00
fclose_nonstdin.c sed: open input files sequentially to avoid EMFILE 2013-11-28 03:14:16 +01:00
fflush_stdout_and_exit.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
fgets_str.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
find_mount_point.c find_mount_point: fix find_mount_point for char devices 2012-01-18 01:49:11 +01:00
find_pid_by_name.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
find_root_device.c plug a DIR* leak on error path 2010-12-28 10:25:03 +01:00
full_write.c *: whitespace fixes 2010-10-28 18:57:19 +02:00
get_console.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
get_cpu_count.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
get_last_path_component.c find: cater for libc w/o FNM_CASEFOLD 2011-05-23 00:40:54 +02:00
get_line_from_file.c libbb: split bb_get_chunk_from_file and bb_get_chunk_with_continuation 2011-06-17 03:37:43 +02:00
get_shell_name.c mark get_shell_name FAST_FUNC 2012-10-03 09:42:21 +02:00
get_volsize.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
getopt32.c randomconfig fixes 2011-08-10 00:51:29 +02:00
getpty.c script: make it work even if fd 0 is closed 2014-03-16 12:34:53 +01:00
hash_md5_sha.c sha3: tweak comments and indentation 2014-07-30 16:26:09 +02:00
hash_md5prime.c regularize options which control size/speed trade 2011-09-10 13:25:57 +02:00
herror_msg.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
human_readable.c Make smart_ulltoa return pointer to end (allows for code shink in callers) 2013-09-06 12:53:14 +02:00
in_ether.c fix failures found by randomconfig builds 2013-12-31 23:22:36 +01:00
inet_cksum.c inet_cksum: big-endian fix 2011-09-08 10:59:26 +02:00
inet_common.c chpst: fix a bug where -U USER was using wrong USER (one from -u USER) 2013-11-29 16:39:28 +01:00
info_msg.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
inode_hash.c du, copy_file: fix file matching on cramfs. Closes 5456 2014-02-25 15:27:58 +01:00
isdirectory.c libbb: remove is_directory's argument which is always NULL 2011-12-18 03:27:46 +01:00
Kbuild.src zcip: Add environment variable for overriding log functionality 2014-11-04 12:19:04 +01:00
kernel_version.c get_linux_version_code: don't fail on Linux version strints like "3.0-foo" 2012-05-05 17:47:23 +02:00
last_char_is.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
lineedit_ptr_hack.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
lineedit.c lineedit: fix trivial build failure 2014-01-10 14:38:26 +01:00
llist.c main: free suid_config list after use 2011-05-16 12:21:31 +02:00
logenv.c zcip: Add environment variable for overriding log functionality 2014-11-04 12:19:04 +01:00
login.c libbb: introduce and use strftime_[YYYYMMDD]HHMMSS() 2013-03-29 12:30:33 +01:00
loop.c libbb: if opening /dev/loopN returns ENXIO, don't try N++. 2014-01-21 13:44:21 +01:00
make_directory.c Add conditional support for -v / --verbose 2014-05-19 16:23:50 +02:00
makedev.c nicer looking ifdef in libbb/makedev.c 2011-01-24 23:53:12 +01:00
match_fstype.c Fix compile breakage 2011-09-07 22:19:46 +02:00
messages.c save 10 bytes on strings 2011-02-10 10:01:49 +01:00
missing_syscalls.c libbb: add missing_syscalls.c: for now, only Android syscalls 2012-06-10 14:40:30 +02:00
mode_string.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
mtab.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
nuke_str.c fix failures found by randomconfig builds 2013-12-31 23:22:36 +01:00
obscure.c unit-tests: implement the unit-testing framework 2014-06-22 16:30:41 +02:00
parse_config.c mdev: do not treat non-leading '#' chars as start of comment. Closes 4676 2012-01-11 00:37:17 +01:00
parse_mode.c *: whitespace fixes 2010-10-28 18:57:19 +02:00
percent_decode.c wget: URL-decode user:password before base64-encoding it into auth hdr. Closes 3625. 2011-09-11 21:04:02 +02:00
perror_msg.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
perror_nomsg_and_die.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
perror_nomsg.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
pidfile.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
platform.c libbb: provide usleep() fallback implementation 2014-04-13 16:37:57 +02:00
print_flags.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
printable_string.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
printable.c Refactor catv. Move visible() from stty to libbb. 2013-07-30 06:29:42 +02:00
process_escape_sequence.c libbb/process_escape_sequence.c: fix recently broken handling of \\ 2010-10-25 12:14:21 +02:00
procps.c whitespace cleanup. no code changes 2013-01-14 15:57:44 +01:00
progress.c libbb: make warning go away 2011-03-12 02:19:50 +01:00
ptr_to_globals.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
pw_encrypt_des.c
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 libbb/pw_encrypt_sha: forgot to move &ctx to 1st param here in sha hash rework 2010-12-01 13:57:25 +01:00
pw_encrypt.c libbb: don't die if crypt() returns NULL 2014-02-09 14:38:03 +01:00
read_key.c Add comments in keyboard escape sequences table 2012-06-11 14:40:17 +02:00
read_printf.c preparatory cleanups for seamless uncompression improvements 2012-03-06 16:23:50 +01:00
read.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
README *: trailing empty lines removed 2010-07-26 01:49:12 +02:00
recursive_action.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
remove_file.c Add conditional support for -v / --verbose 2014-05-19 16:23:50 +02:00
replace.c xargs: add support for -I and -i. Closes 493 2014-02-27 11:17:06 +01:00
rtc.c libbb: fix thinko in rtc_xopen() 2014-05-02 09:07:16 +02:00
run_shell.c *: s/"/bin/sh"/DEFAULT_SHELL, run_shell() API fix, remove unneeded strdup 2010-06-27 03:23:31 +02:00
safe_gethostname.c sendmail: use host rather than NIS domain name for HELO 2012-04-28 17:04:19 +02:00
safe_poll.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
safe_strncpy.c klogd: do not log partial lines 2010-10-19 23:07:49 +02:00
safe_write.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
selinux_common.c whitespace cleanup. no code changes 2013-01-14 15:57:44 +01:00
setup_environment.c su: do not change to home dir unless -l 2012-06-12 13:21:02 +02:00
signals.c libbb: correctness/size tweaks in signal-related helpers 2012-09-27 13:20:34 +02:00
simplify_path.c whitespace cleanup 2010-10-29 11:46:52 +02:00
single_argv.c basename,dirname,freeramdisk,rx,raidautorun,runsv,chvt: skip "--" argument 2011-04-11 03:58:30 +02:00
skip_whitespace.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
speed_table.c libbb: FreeBSD fix for B<num> baud rate constants not fitting into a short. 2014-01-08 15:25:20 +01:00
str_tolower.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
strrstr.c unit-tests: implement the unit-testing framework 2014-06-22 16:30:41 +02:00
sysconf.c libbb: use ARG_MAX for bb_arg_max() only if it's 60k+ 2014-11-26 15:17:59 +01:00
systemd_support.c typo fix 2011-02-12 01:56:25 +01:00
time.c libbb: fix parsing of "10101010" date/time form 2014-01-21 07:58:18 +01:00
trim.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
u_signal_names.c kill[all[5]],pkill: make signal list show signal numbers, and show RTMIN/MAX 2011-01-03 13:08:58 +01:00
udp_io.c Fixes for warnings in FreeBSD build 2011-08-28 05:31:49 +02:00
unicode.c lineedit: improve Unicode handling (still buggy though) 2013-08-19 16:44:05 +02:00
update_passwd.c type fix in comment 2010-11-03 02:48:43 +01:00
utmp.c move utmp.h include to libbb.h 2011-01-25 23:21:46 +01:00
uuencode.c libbb: shrink base64 decoding a bit 2011-10-28 16:15:00 +02:00
vdprintf.c libbb.h: remove unused defines 2011-10-24 04:06:18 +02:00
verror_msg.c Fix compile failures 2014-05-02 07:18:55 +02:00
vfork_daemon_rexec.c bb_daemonize_or_rexec(): add flag to double-fork; use it in start-stop-daemon 2011-11-09 19:44:37 +01:00
warn_ignoring_args.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
wfopen_input.c *: whitespace fixes 2010-10-28 18:57:19 +02:00
wfopen.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
write.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
xatonum_template.c whitespace fixes. no code changes 2013-01-15 13:58:01 +01:00
xatonum.c Commonalize typical [b,]k,m suffix struct 2013-07-13 23:49:45 +02:00
xconnect.c Make unix (local) sockets work without IPv6 enabled 2012-02-09 15:14:33 +01:00
xfunc_die.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
xfuncs_printf.c libbb: Add xsetegid(), xseteuid(), xopen_as_uid_gid() functions 2013-10-08 14:52:49 +02:00
xfuncs.c less: move "retry-on-EAGAIN" logic closer to read ops 2014-09-22 21:14:02 +02:00
xgetcwd.c *: whitespace fixes 2010-10-28 18:57:19 +02:00
xgethostbyname.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
xreadlink.c libbb: fix a bad check for uclibc >= 0.9.31 2014-03-16 20:53:40 +01:00
xrealloc_vector.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
xregcomp.c *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +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>