ash: retain envvars with bad names in initial environment. Closes 10231

Reworks "ash: [VAR] Sanitise environment variable names on entry"
commit.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ntpd: skip over setting next DNS resolution attempt if it is not needed

function                                             old     new   delta
ntpd_main                                           1177    1197     +20
resolve_peer_hostname                                127     129      +2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

Fix build failures if MAXHOSTNAMELEN or MAXPATHLEN is not defined

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

grep: skip grepping symlinks to directories

When grep is passed -r, recursive_action will treat any symlinks to
directories not in the root as normal files, since it lstat's them and
is therefore told they are not directories. However, file_action_grep
will still try to fopen and read from them to see whether they match,
which varies in behaviour across platforms. Linux will give EISDIR and
thus grep will not find any matching lines, but FreeBSD will give the
raw contents of the directory itself, which may match the given pattern.
Also, if grep is passed -c, it will even print a count for these
symlinks, even on Linux.

Since this recursive_action behaviour is required for the correct
functioning of other applets, such as tar, grep should handle this
special case and skip any such symlinks.

function                                             old     new   delta
file_action_grep                                      80     161     +81

Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ntpd: mention in help text that -d can be repeated

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ntpd: improve treatment of DNS resolution failures

function                                             old     new   delta
ntpd_main                                           1106    1177     +71
resolve_peer_hostname                                122     127      +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 76/0)               Total: 76 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

udp_io, traceroute: Standardise IPv6 PKTINFO handling to be portable

The current standard (RFC 3542) is for IPV6_RECVPKTINFO to be given to
setsockopt, and IPV6_PKTINFO to be used as the packet type. Previously,
RFC 2292 required IPV6_PKTINFO to be used for both, but RFC 3542
re-purposed IPV6_PKTINFO when given to setsockopt. The special
Linux-specific IPV6_2292PKTINFO has the same semantics as IPV6_PKTINFO
in RFC 2292, but was introduced at the same time as IPV6_RECVPKTINFO.

Therefore, if we have IPV6_RECVPKTINFO available, we can use the RFC
3542 style, and if not, we assume that only the RFC 2292 API is
available, using IPV6_PKTINFO for both.

Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

df: Use statvfs instead of non-standard statfs

Platforms differ on what their implementations of statfs include.
Importantly, FreeBSD's does not include a f_frsize member inside struct
statfs. However, statvfs is specified by POSIX and includes everything
we need, so we can just use that instead.

Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

xfuncs: Handle missing non-POSIX termios constants

Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

blkdiscard: Only build on Linux

Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

networking: Fall back on IPPROTO_RAW when SOL_RAW is not defined

Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ntpd: perform DNS resolution out of send/receive loop - closes 10466

Bad case: send request to server1good.com; then try to resolve server2bad.com -
this fails, and failure takes ~5 secs; then receive server1's
response 5 seconds later. We'll never sync up in this case...

function                                             old     new   delta
ntpd_main                                           1079    1106     +27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

iproute/iprule: support toolchains without RTA_TABLE routing attribute

 iproute.c: In function 'print_route':
 iproute.c:85:9: error: 'RTA_TABLE' undeclared (first use in this function)
 iproute.c:85:9: note: each undeclared identifier is reported only once for each function it appears in
 iproute.c: In function 'iproute_modify':
 iproute.c:467:36: error: 'RTA_TABLE' undeclared (first use in this function)

Fix it by partially #ifdef'ing the code added in b42107f21538e39d9a344376372f8261aed589b2

Signed-off-by: Eugene Rudoy <gene.devel@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

time: fix build for toolchains without O_CLOEXEC

Based on patch by Eugene Rudoy <gene.devel@gmail.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

unlzma: fix SEGV, closes 10436

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

bunzip2: fix runCnt overflow from bug 10431

This particular corrupted file can be dealth with by using "unsigned".
If there will be cases where it genuinely overflows, there is a disabled
code to deal with that too.

function                                             old     new   delta
get_next_block                                      1678    1667     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hush: fix comment parsing in `cmd`, closes 10421

function                                             old     new   delta
parse_stream                                        2692    2690      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

lsscsi: fix xchdir("..") from symlink in /sys/bus/scsi/devices

Signed-off-by: Markus Gothe <nietzsche@lysator.liu.se>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

whitespace fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

typo fix

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ash: survive failures in $PS1 expansion. Closes 10371

function                                             old     new   delta
expandstr                                            120     209     +89

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

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>

sendmail allow "=" symbol in recipient, closes 10241

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

whitespace and comment format fixes, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

whitespace and comment format fixes, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

do not include <sys/stat.h> just before "libbb.h", it's there already

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

whitespace and comment format fixes, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

free: no longer include common_bufsiz.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

free: make it NOFORK

function                                             old     new   delta
parse_cached_kb                                        -      85     +85
free_main                                            580     537     -43
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 85/-43)             Total: 42 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

date: maybe_set_utc only once

It's not clear at all why we do it twice. git archaeology did not help.

function                                             old     new   delta
date_main                                            836     839      +3
maybe_set_utc                                         16       -     -16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

i2cset: fix 'i' & 's' modes (3 extra bytes were sent)

When 'i' or 's' modes are selected block array is filled from offset 3
(blen = 3) but copied to data.block buffer from offset 0 so first 3 bytes
contains garbage from stack.
The buffer that is sent is also 3 bytes too long due to those extra 3
bytes.

Signed-off-by: Avi Fishman <AviFishman70@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

use %m printf specifier where appropriate

function                                             old     new   delta
out                                                   85      75     -10
udhcpd_main                                         1472    1461     -11
open_stdio_to_tty                                     98      85     -13
init_exec                                            245     232     -13
udhcpc_main                                         2763    2749     -14
do_cmd                                              4771    4755     -16
status_line_bold_errno                                32      14     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/7 up/down: 0/-95)             Total: -95 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

udhcpc[6]: make log2 messages for chaddr field indented like the rest

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

udhcpc: paranoia when using kernel UDP mode for sending renew: server ID may be bogus

With new code, we request that target IP (server ID) must be directly reachable.
If it's not, this happens:

udhcpc: waiting 2000 seconds
udhcpc: entering listen mode: kernel
udhcpc: opening listen socket on *:68 wlan0
udhcpc: entering renew state
udhcpc: sending renew to 1.1.1.1
udhcpc: send: Network is unreachable
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 1.1.1.1 needs routing, this is fishy!
udhcpc: entering rebinding state
udhcpc: entering listen mode: raw
udhcpc: created raw socket
udhcpc: sending renew to 0.0.0.0
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ going to use broadcast

which is the desired behavior. Before the patch, packet to 1.1.1.1 was routed
over eth0 (!) and maybe even into Internet (!!!).

function                                             old     new   delta
udhcpc_main                                         2752    2763     +11
udhcp_send_kernel_packet                             295     301      +6
send_renew                                            82      84      +2
send_packet                                          166     168      +2
bcast_or_ucast                                        23      25      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/0 up/down: 23/0)               Total: 23 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

udhcpc[6]: initialize entire sockaddr_ll

I see random field values like sll_hatype=0x267 when I strace.
They seem to not matter, but just in case they sometimes do,
let's at least have deterministic values (via memset(0)).

function                                             old     new   delta
change_listen_mode                                   308     322     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

regularize format of source file headers, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ip,ip*: make them NOEXEC

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

update NOFORK_NOEXEC.lst

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

httpd: fix handling of range requests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

stty: add cmspar, flusho, extproc attributes

function                                             old     new   delta
mode_info                                            688     704     +16
mode_name                                            502     516     +14
wrapf                                                162     157      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 30/-5)              Total: 25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

netcat: net applet (alias to nc)

function                                             old     new   delta
packed_usage                                       31807   31856     +49
applet_names                                        2701    2708      +7
applet_main                                         1560    1564      +4
applet_install_loc                                   195     196      +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 61/0)               Total: 61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

Clarify OPOST bit meaning

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

less,microcom,lineedit: use common routine to set raw termios

function                                             old     new   delta
get_termios_and_make_raw                               -     139    +139
xget1                                                 39       8     -31
read_line_input                                     3912    3867     -45
less_main                                           2525    2471     -54
set_termios_to_raw                                   116      36     -80
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/4 up/down: 139/-210)          Total: -71 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: code shrink

function                                             old     new   delta
hexedit_main                                        1171    1170      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: fixes to "goto address" code

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: position in correct column on "goto" command

function                                             old     new   delta
hexedit_main                                        1169    1202     +33

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: code shrink

function                                             old     new   delta
hexedit_main                                        1176    1169      -7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexdump: code shrink

function                                             old     new   delta
remap                                                173     178      +5
move_mapping_lower                                   107     109      +2
move_mapping_further                                 141     143      +2
hexedit_main                                        1191    1176     -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 9/-15)              Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: implement "[enter] goto offset" key

This is a must if you need to edit sector 123456789999 on your /dev/disk.

   text    data     bss     dec     hex filename
 922745     481    6832  930058   e310a busybox_old
 923023     481    6832  930336   e3220 busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: restore screen on exit

function                                             old     new   delta
hexedit_main                                         998    1082     +84
restore_term                                           -      29     +29
remap                                                168     173      +5
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 118/0)             Total: 118 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: optimize output buffering

function                                             old     new   delta
hexedit_main                                         970     998     +28

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: implement page up/down

function                                             old     new   delta
hexedit_main                                         924     970     +46

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

*: use ESC define instead of "\033"; use ESC[m instead of ESC[0m

   text    data     bss     dec     hex filename
 922535     481    6832  929848   e3038 busybox_old
 922534     481    6832  929847   e3037 busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: smarter redraw

function                                             old     new   delta
format_line                                          197     209     +12
hexedit_main                                         930     924      -6
redraw_cur_line                                      104      94     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 12/-16)             Total: -4 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hexedit: new applet

function                                             old     new   delta
hexedit_main                                           -     930    +930
format_line                                            -     197    +197
remap                                                  -     168    +168
move_mapping_further                                   -     141    +141
move_mapping_lower                                     -     107    +107
redraw_cur_line                                        -     104    +104
packed_usage                                       31802   31812     +10
applet_names                                        2688    2696      +8
applet_main                                         1552    1556      +4
applet_suid                                           97      98      +1
applet_install_loc                                   194     195      +1
------------------------------------------------------------------------------
(add/remove: 7/0 grow/shrink: 5/0 up/down: 1671/0)           Total: 1671 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

networking/interface.c: remove superfluous "& 0377"

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

setfattr: new applet

function                                             old     new   delta
setfattr_main                                          -     189    +189
packed_usage                                       31516   31588     +72
setxattr                                               -      53     +53
lsetxattr                                              -      53     +53
removexattr                                            -      37     +37
lremovexattr                                           -      37     +37
applet_names                                        2649    2658      +9
find_applet_by_name                                  124     128      +4
applet_main                                         1532    1536      +4
------------------------------------------------------------------------------
(add/remove: 7/0 grow/shrink: 4/0 up/down: 458/0)             Total: 458 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

build system: fix a compiler warning

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

build system: fix "allnoconfig" to clear all options. Closes 10296

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

chat: do not die when HANGUP param is missing. Closes 10016

function                                             old     new   delta
chat_main                                           1356    1379     +23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

httpd: skip "Status: " from CGI, including space. Closes 10291

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

klibc-utils: add ipconfig.c work-in-progress

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

xargs: fix a thinko in last commit

IF_FEATURE_XARGS_SUPPORT_PARALLEL(char *opt_a = NULL;)
is replaced with
IF_FEATURE_XARGS_SUPPORT_ARGS_FILE

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

xargs: support -a FILE

The GNU-specific option -a lets xargs read the arguments from a file
rather than from stdin.

This is particularly convenient when debugging in gdb interactively,
and it might be of more general use.

function                                             old     new   delta
xargs_main                                           788     823     +35
packed_usage                                       31683   31671     -12

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

klibc-utils: remove accidental "or later" licensing wording.

I (slightly) prefer my code to be under "GPLv2 only" license.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

udhcpc: show only short opts in --help text

function                                             old     new   delta
packed_usage                                       31615   31501    -114

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

i2c_tools: tweak --help text

function                                             old     new   delta
packed_usage                                       31624   31615      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

setpriv: placete "declaration of 'index' shadows a global declaration" warning

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hush: fix false positive in unset.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hush: GETOPT_RESET() _after_ getopts too.

NOEXEC'ed applets which use getopt() need this.

function                                             old     new   delta
builtin_getopts                                      403     413     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hush: reuse "OPTIND=..." string

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hush: fix "getopts" builtin to not be upset by other builtins calling getopt()

function                                             old     new   delta
builtin_getopts                                      363     403     +40
unset_local_var_len                                  185     215     +30
set_local_var                                        440     466     +26
reset_traps_to_defaults                              151     157      +6
pseudo_exec_argv                                     320     326      +6
install_special_sighandlers                           52      58      +6
pick_sighandler                                       62      65      +3
execvp_or_die                                         85      88      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 8/0 up/down: 120/0)             Total: 120 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

i2c-tools: don't include linux/i2c-dev.h

Installing headers from upstream i2c-tools makes it impossible to
build the busybox version due to redefined symbols. This is caused by
the fact that linux/i2c-dev.h from i2c-tools overwrites the one from
linux uapi and defines symbols already defined by linux' linux/i2c.h.

Drop this include and simply re-implement the relevant defines from
linux/i2c-dev.h in miscutils/i2c-tools.c.

Tested by building on systems with and without i2c-tools headers.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

i2c-tools: remove unneeded include

We no longer use common_bufsiz1 in i2c-tools.

Don't include common_bufsiz.h.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

kill: add '--' option to separate options from arguments

Using a negative pid to send TERM to a process group results in an
obscure error:

   $ ./busybox kill -12345
   kill: bad signal name '12345'

This is intended. Manpage says:
ARGUMENTS
       pid    Each pid can be one of four things:
...
              -n     where n is larger than 1.  All processes in process group
                     n are signaled.  When an argument of  the  form  '-n'  is
                     given,  and it is meant to denote a process group, either
                     a signal must be specified first, or the argument must be
                     preceded  by a '--' option, otherwise it will be taken as
                     the signal to send.

However, we did not support "--". Add this capability to BusyBox.

function                                             old     new   delta
kill_main                                            993     999      +6

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

xargs: optional support for -P NUM. Closes 9511

Based on patch by Johannes Schindelin <johannes.schindelin@gmx.de>

function                                             old     new   delta
xargs_exec                                             -     294    +294
packed_usage                                       31757   31772     +15
xargs_main                                           787     719     -68
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 309/-68)           Total: 241 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

xargs: code shrink

function                                             old     new   delta
xargs_main                                           827     787     -40

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

sed: in '/regexp/cmd1;//cmd2', cmd2 should use the same regexp as cmd1

function                                             old     new   delta
get_address                                          165     211     +46

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

*: fix fallout from opt_complementary conversion

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ash: more s/error/perror/ for better error reporting

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ash: when cd fails, say why

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ash: report reason when a script file could not be opened

It is always nicer to give the user some sort of indication why an
operation failed.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

tar: fix handling of first argument without '-'

The following no longer works as expected:

   $ ./busybox tar xfz test.tgz
   tar: can't open 'z': No such file or directory

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

sendmail: fix segfault if "To: email1,email2" is used

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libarchive: fix build failure on NOMMU systems

In the old code fd was an argument, now we need to get the file descriptor
from the xstate structure.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ps: fix build failure if FEATURE_PS_TIME is disabled

The global seconds_since_boot is only defined if FEATURE_PS_TIME
is enabled.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

rpm,rpm2cpio: do not compile not-configurred parts of rpm.c

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

run-init: if doing dry run, do not require pid==1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ps: allow ps config options if minips is enabled

Follow-up of commit ab77e81a8527fa11a4f9392d97c2da037d6f4f98
"klibc-utils: new applets: resume, nuke, minips"

Also put FEATURE_PS_UNUSUAL_SYSTEMS to under FEATURE_PS_TIME in the
menu.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

run-init: implement -n "dry run"

function                                             old     new   delta
switch_root_main                                     637     706     +69
packed_usage                                       31743   31757     +14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 83/0)               Total: 83 bytes
   text    data     bss     dec     hex filename
 915247     563    5844  921654   e1036 busybox_old
 915303     563    5844  921710   e106e busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

run-init: new applet

function                                             old     new   delta
switch_root_main                                     354     637    +283
drop_usermodehelper                                    -     157    +157
cap_name_to_number                                     -      77     +77
packed_usage                                       31707   31743     +36
applet_names                                        2665    2674      +9
applet_main                                         1544    1548      +4
applet_install_loc                                   193     194      +1
setpriv_main                                         933     928      -5
getcaps                                              131     122      -9
parse_cap                                            117      29     -88
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 5/3 up/down: 567/-102)          Total: 465 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libbb: move capability names code to libbb

function                                             old     new   delta
cap_name_to_number                                     -      77     +77
parse_cap                                            117      29     -88
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/1 up/down: 77/-88)            Total: -11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

setpriv: code shrink

function                                             old     new   delta
parse_cap                                            125     117      -8
setpriv_main                                         949     933     -16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-24)             Total: -24 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

nuke: shorten help text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

klibc-utils: new applets: resume, nuke, minips

minips is a pure alias to ps, just in case someone needs 100% klibc-utils compat.
nuke is a primitive version of "rm -rf" without options and error checks. ~30 bytes.

resume is a tool for initramfs which resumes from a given block device.

function                                             old     new   delta
resume_main                                            -     582    +582
packed_usage                                       31640   31712     +72
nuke_main                                              -      28     +28
xstrtoull                                              -      24     +24
applet_names                                        2646    2665     +19
applet_main                                         1532    1544     +12
applet_suid                                           96      97      +1
applet_install_loc                                   192     193      +1
applet_flags                                          96      97      +1
------------------------------------------------------------------------------
(add/remove: 5/0 grow/shrink: 6/0 up/down: 740/0)             Total: 740 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

setpriv: accept any case in capability names

This should work: setpriv --inh-caps -SyS_ReSOuRCE sh

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

ash: stage backported LINENO support as a separate patch

Looks biggish and not particularly useful, but may be easier to just eat
the impact if future backports from dash would be otherwise increasingly
difficult.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

telnet: "-a" + "-l USER" should respect USER

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

hush: trivial code shrink in builtin_getopts

function                                             old     new   delta
builtin_getopts                                      368     363      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

awk: stop on first non-option, closes 9861

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>