Commit Graph

14151 Commits

Author SHA1 Message Date
Denys Vlasenko
8286513838 hush: rework input char buffering to allow more than one-deep peek
This fixes backslash+newline continuation in
	$VAR\
	NAME
construct. (ash has a bug there as well).

function                                             old     new   delta
file_peek2                                             -      74     +74
parse_dollar                                         746     773     +27
expand_vars_to_list                                 1143    1167     +24
setup_string_in_str                                   32      46     +14
setup_file_in_str                                     33      47     +14
file_get                                             264     278     +14
static_peek2                                           -       7      +7
file_peek                                             91      72     -19
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 5/1 up/down: 174/-19)           Total: 155 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-29 16:59:06 +02:00
Denys Vlasenko
3b4d04b77e ash: input: Allow two consecutive calls to pungetc
Upstream commit:

    input: Allow two consecutive calls to pungetc

    The commit ef91d3d6a4c39421fd3a391e02cd82f9f3aee4a8 ([PARSER]
    Handle backslash newlines properly after dollar sign) created
    cases where we make two consecutive calls to pungetc.  As we
    don't explicitly support that there are corner cases where you
    end up with garbage input leading to undefined behaviour.

    This patch adds explicit support for two consecutive calls to
    pungetc.

    Reported-by: Jilles Tjoelker <jilles@stack.nl>
    Reported-by: Juergen Daubert <jue@jue.li>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

In bbox case, bashism >& may need two pungetc() too.

function                                             old     new   delta
pgetc                                                514     555     +41
pushstring                                           114     144     +30
basepf                                                52      76     +24
popstring                                            134     151     +17
parse_command                                       1584    1585      +1
pungetc                                               12       9      -3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/1 up/down: 113/-3)            Total: 110 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-29 02:11:19 +02:00
Denys Vlasenko
78c9c736ab hush: fix 'eval ""' handling
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-29 01:44:17 +02:00
Denys Vlasenko
992e0ff7e9 hush: fix ". EMPTY_LINE" not setting $? to 0
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-29 01:27:09 +02:00
Denys Vlasenko
46a45ce02f ash: jobs: Don't attempt to access job table for job %0
Upstream commit:

    jobs: Don't attempt to access job table for job %0

    If job %0 is (mistakenly) specified, an out-of-bounds access to the
    jobtab occurs in function getjob() if num = 0:

            jp = jobtab + 0 - 1

    Fix this by checking that the job number is larger than 0 before
    accessing the jobtab.

    Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-29 01:10:08 +02:00
Denys Vlasenko
928e2a7ef4 ash: [EVAL] Make eval with empty arguments return 0
This is a backport of upstream commit:

    [EVAL] Make eval with empty arguments return 0

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-29 00:30:31 +02:00
Denys Vlasenko
8e2bc47d62 ash: [EVAL] Fix use-after-free in dotrap/evalstring
From upstream:

    [EVAL] Fix use-after-free in dotrap/evalstring

    The function dotrap calls evalstring using the stored trap string.
    If evalstring then unsets that exact trap string then we will end
    up using freed memory.

    This patch fixes it by making evalstring always duplicate the string
    before using it.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-28 23:02:57 +02:00
Denys Vlasenko
7ee7c6fc20 ash: Remove unused EV_BACKCMD flag
The original ash defered forking commands in backquotes so builtins
    could be run in the same context as the shell.  This behavior was
    controlled using the EV_BACKCMD to evaltree.

    Unfortunately, as Matthias Scheler noticed in 1999 (NetBSD PR/7814),
    the result was counterintuitive; for example, echo "`cd /`" would
    change the cwd.  So ash 0.3.5 left out that optimization.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-28 19:44:16 +02:00
Denys Vlasenko
eb17b6f6c9 ash: eval: Return status in eval functions
Backported from dash:

    eval: Return status in eval functions

    The exit status is currently clobbered too early for case statements
    and loops.  This patch fixes it by making the eval functions return
    the current exit status and setting them in one place -- evaltree.

    Harald van Dijk pointed out a number of bugs in the original patch.

function                                             old     new   delta
evalcommand                                         1226    1242     +16
cmdloop                                              383     398     +15
evalfor                                              223     227      +4
evalcase                                             271     275      +4
localcmd                                             348     350      +2
evaltreenr                                           927     928      +1
evaltree                                             927     928      +1
evalsubshell                                         150     151      +1
evalpipe                                             356     357      +1
parse_command                                       1585    1584      -1
evalloop                                             177     164     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 9/2 up/down: 45/-14)             Total: 31 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-28 19:41:57 +02:00
Denys Vlasenko
1c32e49bdf traceroute: cleanup and fixes for packet size calculations
Remove FEATURE_TRACEROUTE_SOURCE_ROUTE: it's off by default, and
source routing is not used in real world.

Tested that "traceroute -n ::1 100" and "traceroute -n 127.0.0.1 100"
both send 100 byte IP packets (this matches what traceroute on Fedora
Rawhide is doing).

function                                             old     new   delta
common_traceroute_main                              3731    3738      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-28 18:44:48 +02:00
Denys Vlasenko
61fcc8c781 vi: fix '' command (goto to prev context)
The '' command in vi doesn't currently work because after the first
apostrophe is read, the next character is converted to an integer
between 0 and 25 inclusive (for indexing the array of marks). The
comparison of the converted character with an apostrophe therefore never
succeeds, meaning that '' doesn't do anything.

Based on the patch by Francis Rounds <francis.rounds@4bridgeworks.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-28 16:23:05 +02:00
Denys Vlasenko
b09ab448b8 mount: for cifs, dont insert "ip=ADDR" option if user gave it explicitly
This makes it possible to use scoped IPv6 addresses:

mount -t cifs -o ip=<ADDR>%<iface_id> //<ADDR>/test test

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-27 21:02:35 +02:00
Denys Vlasenko
dea3bdbefe examples: wpa_supplicant.conf has a wrong field deleted in examples
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-26 20:47:17 +02:00
Denys Vlasenko
5093c8c4aa mount: tweak "IPv6 scoped addr" commit
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-26 20:36:30 +02:00
Denys Vlasenko
3c18e3051d libbb: make xmalloc_sockaddr2dotted use NI_NUMERICSCOPE
Gives "mount -t cifs //fe80::6a05:caff:fe3e:dbf5%eth0/test test"
a chance to work: mount must pass "ip=numeric_IPv6%numeric_iface_id"
in the omunt option string. Currently, it does not.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-26 19:53:04 +02:00
Denys Vlasenko
525209ac94 libbb/speed_table.c: expand comments
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-26 14:37:12 +02:00
Denys Vlasenko
4537f83d52 typo fix in comment
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-26 08:52:52 +02:00
Denys Vlasenko
557482c1cb ash: in heredoc code, fix access past the end of allocated memory. Closes 9276
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-25 21:24:04 +02:00
Denys Vlasenko
13f20919b2 ash: fix handling of NULs in $'abc\000def\x00asd'. Closes 9286
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-25 20:54:25 +02:00
Denys Vlasenko
bcf47eaa1f ifupdown: improve help text, add comment about run-parts error msg
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-25 02:05:24 +02:00
Denys Vlasenko
65ba7113e3 libbb: handle \S in /etc/issue
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-24 23:50:43 +02:00
Linus Walleij
d526b11897 AUTHORS: Add myself to AUTHORS
Instead of complaining that my authorship of the rewrite of
the mdev to use /sys/dev is totally gone from the git history
I bravely take credit by adding myself to the AUTHORS file
instead, he he.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-22 11:25:02 +02:00
Denys Vlasenko
b3f29b452a ash: use glob() from libc
Adapted from dash.
The "homegrown" glob code is retained (ifdef'ed out).
This changes was inspired by bug 9261, which detected out-of bounds use of heap
for 2098 byte long name in the "homegrown" code. This is still not fixed...

function                                             old     new   delta
expandarg                                            960     982     +22
static.syntax_index_table                             26      25      -1
static.spec_symbls                                    27      26      -1
static.metachars                                       4       -      -4
addfname                                              42       -     -42
msort                                                126       -    -126
expmeta                                              528       -    -528
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 1/2 up/down: 22/-702)          Total: -680 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-21 16:25:58 +02:00
Denys Vlasenko
d8330ca4a4 examples/var_service/supplicant_if: new service example
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-20 18:09:00 +02:00
Denys Vlasenko
92d98f0612 ifupdown: when flushing addresses with "ip", add label %label%
User report:

or our board we setup eth0:0 on a 10.10.10.x/29 netwrok.

The problem is ip addr flush dev eth0:0 removes all ip addresses from
eth0.  You can see this if you run
ip -stat -stat addr flush dev eth0:0

2: eth0    inet 172.27.105.10/22 brd 172.27.107.255 scope global eth0
       valid_lft forever preferred_lft forever
2: eth0    inet 10.10.10.9/29 scope global eth0:0
       valid_lft forever preferred_lft forever
2: eth0    inet6 fe80::a2f6:fdff:fe18:2b13/64 scope link
       valid_lft forever preferred_lft forever

*** Round 1, deleting 3 addresses ***
*** Flush is complete after 1 round ***

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-20 17:31:11 +02:00
Denys Vlasenko
244fdd45c7 ash: fix handling of bashism $'xxx' with high-bit chars. Closes 9236
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-20 17:04:09 +02:00
Denys Vlasenko
d6a37d86ba hush: document better where bad redirect syntax is detected
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-20 16:22:24 +02:00
Hauke Mehrtens
4ff86df861 libnetlink: fix alignment of netlink messages
A padding to align a message should not only be added between
different attributes of a netlink message, but also at the end of the
message to pad it to the correct size.

Without this patch the following command does not work and returns an
error code:
ip link add type nlmon

Without this ip from busybox sends this:

sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000},
	msg_namelen=12, msg_iov=[{iov_base={{len=45, ...},
		"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\22\0\t\0\1nlmon"}, iov_len=45}],
	msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 45
return value: 2

The normal ip utile from iproute2 sends this:

sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000},
	msg_namelen=12, msg_iov=[{iov_base={{len=48, ...},
		"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\22\0\t\0\1nlmon\0\0\0"}, iov_len=48}],
	msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 48
return value: 0

With this patch ip from busybox sends this:

sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000},
	msg_namelen=12, msg_iov=[{iov_base={{len=48, ...},
		"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\22\0\t\0\1nlmon\0\0\0"}, iov_len=48}],
	msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 48
return value: 0

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-18 22:55:47 +02:00
Denys Vlasenko
0ae0509679 libbb: do not use fflush_unlocked, musl does not like fflush_unlocked(NULL)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-18 21:49:30 +02:00
Rostislav Skudnov
204c7fb229 ash: exit after subshell error when errexit option is set
When "set -e" option is on, shell must exit when any command fails,
including compound commands of the form (compound-list) executed in a
subshell. Bash and dash shells have this behaviour.

Also add a corresponding testcase.

Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-17 23:28:23 +02:00
Denys Vlasenko
b157eb13cb fdisk: fix CONFIG_FEATURE_SUN_LABEL=y build
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-17 21:05:06 +02:00
Denys Vlasenko
7373759947 fix "aloc" -> "alloc" typos
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-17 20:58:22 +02:00
Denys Vlasenko
7bc3d39695 ash: add a FIXME for bug 9246
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-17 20:53:47 +02:00
Francis Rounds
d2c5de0130 svlogd: strip leading '!' from processor lines
When using svlogd's processor functionality to run arbitrary commands
on log rotation, the line in the config is executed verbatim, i.e. the
exclamation mark is included.

For example, if the config file contains:

    s100
    !cat

then when it's time to rotate the log files after each 100 bytes, sh -c
"!cat" will be run, instead of sh -c "cat" as intended. The result is
svlogd logging

    /bin/bash: !cat: command not found
    svlogd: warning: processor failed, restart: /tmp/svlogd/

over and over again as it keeps attempting to execute the processor and
failing (unless you happen to have a "!cat" binary around :)).

Skipping the exclamation mark when performing the wstrdup() fixes the
issue.

Signed-off-by: Francis Rounds <francis.rounds@4bridgeworks.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-15 14:05:04 +02:00
Denys Vlasenko
de1996dac5 vi: make "g<key>" error message less likely to show garbage
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-15 13:53:42 +02:00
Denys Vlasenko
7cef4817d6 libbb:/send_to_from: do not require that "to" should have the same AF. Closes 9146
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-15 13:20:51 +02:00
Mike Frysinger
3a45b87ac3 modutils: support finit_module syscall
On some systems like Chromium OS, loading modules from non-verified
filesystems is denied.  Only finit_module is allowed because an open
fd is passed which can be checked against a verified location.

Change the module loading code to first attempt finit_module and if
that fails for whatever reason, fall back to the existing logic.

On x86_64, this adds ~80 bytes to modutils/modutils.o and ~68 bytes
to modutils/modprobe-small.o.

Signed-off-by: Mike Frysinger <vapier@chromium.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-15 12:16:33 +02:00
Denys Vlasenko
7fa799a97d less: switch off nonblock on kbd_fd before exit
This is only necessary if we use stdout fd.

function                                             old     new   delta
less_exit                                             32      51     +19
less_main                                           2540    2543      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 22/0)               Total: 22 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-13 21:05:48 +02:00
Denys Vlasenko
3c0e579a06 less: fall back to using fd #1 for keyboard reading. Closes 9231
function                                             old     new   delta
less_main                                           2535    2540      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-13 20:53:38 +02:00
Denys Vlasenko
20a3262cd7 mdev: create devices from /sys/dev
Currently some new devices that have a bus but no class will
be missed by mdev coldplug device creation after boot. This
happens because mdev recursively searches /sys/class which will
by definition only find class devices.

Some important devices such as iio and gpiochip does not have
a class. But users will need them.

This switches from using /sys/class as the place to look for
devices to create to using /sys/dev where all char and block
devices are listed.

The subsystem lookup code that provide the G.subsystem
environment variable is changed from using the directory
name of the class device to instead dereference the
"subsystem" symlink for the device, and look at the last
element of the path of the symlink for the subsystem, which
will work with class devices and bus devices alike. (The new
bus-only devices only symlink to the /sys/bus/* hierarchy.)

We delete the legacy kernel v2.6.2x /sys/block device path
code as part of this change. It's too old to be kept alive.

Tested on kernel v4.6-rc2 with a bunch of devices, including
some IIO and gpiochip devices.

With a print inserted before make_device() the log looks
like so:

Create device from "/sys/dev/char/1:1", subsystem "mem"
Create device from "/sys/dev/char/1:2", subsystem "mem"
Create device from "/sys/dev/char/1:3", subsystem "mem"
Create device from "/sys/dev/char/1:5", subsystem "mem"
(...)
Create device from "/sys/dev/block/179:56", subsystem "block"
Create device from "/sys/dev/block/179:64", subsystem "block"

function                                             old     new   delta
mdev_main                                           1388    1346     -42
dirAction                                            134      14    -120
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-162)           Total: -162 bytes

Cc: Isaac Dunham <ibid.ag@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-07 14:09:01 +02:00
Denys Vlasenko
b9f56e82da sendmail: make it possible to pause after connection helper is started
If a non-starttls helper is in use, initial 220 response is processed by us,
not by helper.
Some servers consider us to be a spammer if we don't wait for it.

It is not in protocol, but it is a real-life problem.

The workaround in this patch is a magic envvar, $SMTP_ANTISPAM_DELAY:

...
	-H 'PROG ARGS'	Run connection helper. Examples:
		openssl s_client -quiet -tls1 -starttls smtp -connect smtp.gmail.com:25
		openssl s_client -quiet -tls1 -connect smtp.gmail.com:465
			$SMTP_ANTISPAM_DELAY: seconds to wait after helper connect
...

By using it, people can tweak sendmail behavior even if sendmail invocation
is buried in some scripts.

function                                             old     new   delta
packed_usage                                       30464   30497     +33
sendmail_main                                       1185    1206     +21
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 54/0)               Total: 54 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-07 13:16:33 +02:00
Serj Kalichev
d42cdc2222 volume_id: Add support for UBIFS
Signed-off-by: Serj Kalichev <serj.kalichev@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-06 18:31:01 +02:00
Denys Vlasenko
9fd61be191 libbb/xwrite: print errno on "short write" errors
Lauri Kasanen:
:: Over at TinyCore, we receive a huge number of questions of the type "I
:: got "short write", what does it mean?". Mostly for the rpi port and when
:: using bb wget.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-05 15:20:10 +02:00
Denys Vlasenko
76787a7e02 libbb/speed_table.c: survive B115200 and B230400 not fitting into 16 bits
Seen on OSX.
While at it, expand baud table with B500000..B4000000

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-01 11:44:13 +02:00
Denys Vlasenko
ef15970d7e *: placate some compile warnings on OSX
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-01 11:16:22 +02:00
Denys Vlasenko
76d72376e0 sed: fix "sed n (flushes pattern space, terminates early)" testcase failure
Patch based on work by Dengke Du <dengke.du@windriver.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-01 01:59:11 +02:00
Denys Vlasenko
9ff910de6b wget: treat 201,202,203 as success codes too. Closes 9211
This matches "standard" wget.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-08-31 13:28:53 +02:00
Denys Vlasenko
d811aaa43c sha3sum: fix config text (it's no longer only 512-bit)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-08-29 15:20:15 +02:00
Denys Vlasenko
71a090f187 sha3: fix to conform to final SHA3 padding standard, add -a BITS option
function                                             old     new   delta
hash_file                                            331     396     +65
md5_sha1_sum_main                                    485     538     +53
packed_usage                                       30423   30464     +41
sha3_begin                                            17      31     +14
sha3_hash                                            101     110      +9
sha3_end                                              41      49      +8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-08-29 14:05:25 +02:00
Denys Vlasenko
d3d7f085eb hexdump: fix numerous bugs in handling of backslashes
Was:
	t=48\\	t=45\\	t=4c\\	t=4c\\	t=4f\\	t=0a\\
Now:
	=48=\n	=45=\n	=4c=\n	=4c=\n	=4f=\n	=0a=\n

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-08-26 20:14:31 +02:00