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174 Commits

Author SHA1 Message Date
Denys Vlasenko
9782cb7774 awk: rename TC_SEQSTART/END to L/RPAREN, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-29 01:50:47 +02:00
Denys Vlasenko
a493441ca5 awk: deindent code block, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-29 01:30:49 +02:00
Denys Vlasenko
adcd9a6f34 awk: use TS_foo for combined token classes. No code changes 
Confusion with "simple" classes was the cause of a bug fixed by previous commit

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-29 01:23:37 +02:00
Denys Vlasenko
832cb4fcb9 awk: make ltclass ("last token class") local to next_token() 
function                                             old     new   delta
next_token                                           784     790      +6
next_input_file                                      219     216      -3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 6/-3)                Total: 3 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-29 01:09:08 +02:00
Denys Vlasenko
af0172369e awk: remove redundant check 
function                                             old     new   delta
next_token                                           785     784      -1
parse_program                                        337     328      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-10)             Total: -10 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-29 01:03:42 +02:00
Denys Vlasenko
78645d8371 awk: move locals deeper into scopes where they are used, no logic changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-25 19:41:05 +02:00
Denys Vlasenko
8c5da0323b awk: more efficient -f FILE, document what "some trick in next_token" is 
function                                             old     new   delta
awk_main                                             890     898      +8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-25 19:38:27 +02:00
Denys Vlasenko
ac4786ba00 qwk: make code clearer, no actual code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-20 22:52:29 +02:00
Denys Vlasenko
fd217c1cbf awk: after preinc/dec, only allow variable, field ref, array ref, or another preinc/dec 
Accepting nonsense like "--4", and even "-- -4" is confusing.

function                                             old     new   delta
parse_expr                                           917     938     +21

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-18 16:35:27 +02:00
Denys Vlasenko
a885ce1af0 awk: fix use-after-free in "$BIGNUM1 $BIGGERNUM2" concat op 
Second reference to a field reallocs/moves Fields[] array, but first ref
still tries to use the element where it was before move.

function                                             old     new   delta
fsrealloc                                             94     106     +12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-16 09:21:40 +02:00
Ron Yorston
e8fe9f9635 awk: allow printf('%c') to output NUL, closes 13486 
Treat the output of printf as binary rather than a null-terminated
string so that NUL characters can be output.

This is considered to be a GNU extension, though it's also available
in mawk and FreeBSD's awk.

function                                             old     new   delta
evaluate                                            3487    3504     +17
awk_printf                                           504     519     +15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 32/0)               Total: 32 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-02 13:51:14 +01:00
Denys Vlasenko
665a659530 awk: FS regex matches only non-empty separators (gawk compat) 
function                                             old     new   delta
awk_split                                            484     553     +69

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-02 19:07:31 +01:00
Denys Vlasenko
965b795b87 decrease paddign: gcc-9.3.1 slaps 32-byte alignment on arrays willy-nilly 
text	   data	    bss	    dec	    hex	filename
1021988	    559	   5052	1027599	  fae0f	busybox_old
1021236	    559	   5052	1026847	  fab1f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-11-30 13:03:03 +01:00
Denys Vlasenko
5323af7f51 awk: fix dodgy multi-char separators splitting logic 
function                                             old     new   delta
awk_split                                            521     484     -37

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-11-16 10:40:32 +01:00
Denys Vlasenko
6f7a009649 awk: disallow "str"++, closes bug 12981 
function                                             old     new   delta
parse_expr                                           887     896      +9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-06-09 01:33:54 +02:00
Denys Vlasenko
bd8b05ba1b awk: fix more "length" cases, closes 12486 
function                                             old     new   delta
next_token                                           808     831     +23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-02-02 23:28:55 +01:00
James Byrne
6937487be7 libbb: reduce the overhead of single parameter bb_error_msg() calls 
Back in 2007, commit 0c97c9d437 ("'simple' error message functions by
Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower
overhead call to bb_perror_msg() when only a string was being printed
with no parameters. This saves space for some CPU architectures because
it avoids the overhead of a call to a variadic function. However there
has never been a simple version of bb_error_msg(), and since 2007 many
new calls to bb_perror_msg() have been added that only take a single
parameter and so could have been using bb_simple_perror_message().

This changeset introduces 'simple' versions of bb_info_msg(),
bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and
bb_herror_msg_and_die(), and replaces all calls that only take a
single parameter, or use something like ("%s", arg), with calls to the
corresponding 'simple' version.

Since it is likely that single parameter calls to the variadic functions
may be accidentally reintroduced in the future a new debugging config
option WARN_SIMPLE_MSG has been introduced. This uses some macro magic
which will cause any such calls to generate a warning, but this is
turned off by default to avoid use of the unpleasant macros in normal
circumstances.

This is a large changeset due to the number of calls that have been
replaced. The only files that contain changes other than simple
substitution of function calls are libbb.h, libbb/herror_msg.c,
libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c,
networking/udhcp/common.h and util-linux/mdev.c additonal macros have
been added for logging so that single parameter and multiple parameter
logging variants exist.

The amount of space saved varies considerably by architecture, and was
found to be as follows (for 'defconfig' using GCC 7.4):

Arm:     -92 bytes
MIPS:    -52 bytes
PPC:   -1836 bytes
x86_64: -938 bytes

Note that for the MIPS architecture only an exception had to be made
disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h)
because it made these files larger on MIPS.

Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-07-02 11:35:03 +02:00
Brian Foley
1c42c18e96 awk: Fix overly permissive func arg list parsing 
It allows things like 'func f(a b)' and 'func f(a,)' which GNU awk forbids.

function                                             old     new   delta
parse_program                                        327     367     +40
chain_expr                                            40      67     +27
parse_expr                                           891     915     +24
EMSG_TOO_FEW_ARGS                                     30      18     -12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 91/-12)             Total: 79 bytes

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-21 12:59:19 +01:00
Brian Foley
08a514c097 awk: Syntax error if delete isn't given an arg. 
Unlike exit and return, delete strictly requires an arg, and derefs a
null pointer if executed without one.

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-21 12:55:49 +01:00
Brian Foley
dac15a10ac awk: Guard pointer chasing when parsing ternary expressions. 
Avoids an uninit pointer deref for some malformed ternary exprs.

Add a test that would crash in busybox before this fix.

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2019-01-21 12:55:49 +01:00
Denys Vlasenko
b097a84d62 config: update size information 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-12-28 03:20:17 +01:00
Denys Vlasenko
75a1c87357 awk: abort if NF set to negative value 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-11-28 12:16:29 +01:00
Denys Vlasenko
2454e678cb awk: do not allow $(-1) 
function                                             old     new   delta
EMSG_NEGATIVE_FIELD                                    -      25     +25
evaluate                                            3390    3403     +13
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 38/0)               Total: 38 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-23 10:53:18 +02:00
Denys Vlasenko
844a6c5abd awk: code shrink 
function                                             old     new   delta
awk_main                                             955     948      -7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-07 14:39:34 +01:00
Denys Vlasenko
6f4a785bd1 awk: fix 'delete array[var--]' decrementing var twice 
function                                             old     new   delta
evaluate                                            3395    3390      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-07 01:19:08 +01:00
Denys Vlasenko
0c4dbd481a regularize format of source file headers, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-09-18 16:28:43 +02:00
Denys Vlasenko
a1799db4ac awk: stop on first non-option, closes 9861 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-16 19:07:53 +02:00
Denys Vlasenko
95f7953f2c do not use `a' quoting style in comments 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-02 14:26:33 +02:00
Denys Vlasenko
68b653b66b config: trim/improve item names and help texts, take 2 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-27 10:53:09 +02:00
Denys Vlasenko
72089cf6b4 config: deindent all help texts 
Those two spaces after tab have no effect, and always a nuisance when editing.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-21 09:50:55 +02:00
Denys Vlasenko
75d151e31d libarchive: FEATURE_LZMA_FAST should be visible if FEATURE_SEAMLESS_LZMA 
While at it, tweak some config help texts.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-20 23:28:00 +02:00
Denys Vlasenko
4eed2c6c50 Update menuconfig items with approximate applet sizes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 22:01:24 +02:00
Brian Foley
61d5997b58 awk: fix segfault on for loop syntax error 
Parsing "for()" segfaults as awk fails to find loop iteration expressions.

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-24 02:09:56 +02:00
Denys Vlasenko
237bedd499 getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LIST 
In many cases, this aqllows to drop use of opt_complementary.
Approximately -400 bytes:

function                                             old     new   delta
getopt32                                            1423    1502     +79
opt_string                                            17      18      +1
OPT_STR                                               24      25      +1
uniq_main                                            416     406     -10
timeout_main                                         279     269     -10
sulogin_main                                         270     260     -10
readprofile_main                                    1825    1815     -10
ps_main                                              543     533     -10
pidof_main                                           245     235     -10
pgrep_main                                           611     601     -10
od_main                                             2600    2590     -10
mkfs_minix_main                                     2684    2674     -10
mkfs_ext2_main                                      2603    2593     -10
microcom_main                                        712     702     -10
makemime_main                                        315     305     -10
ionice_main                                          282     272     -10
inetd_main                                          2074    2064     -10
ifplugd_main                                        1144    1134     -10
halt_main                                            353     343     -10
getopt_main                                          636     626     -10
fdisk_main                                          2854    2844     -10
env_main                                             206     196     -10
dmesg_main                                           319     309     -10
conspy_main                                         1214    1204     -10
awk_main                                             981     971     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/22 up/down: 81/-220)         Total: -139 bytes
   text	   data	    bss	    dec	    hex	filename
 919373	    906	  14060	 934339	  e41c3	busybox_old
 918969	    906	  14060	 933935	  e402f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-07-06 21:58:02 +02:00
Denys Vlasenko
28b00ce6ff awk: support "length" form of "length()". Closes 8371 
function                                             old     new   delta
parse_expr                                           805     848     +43
tokenlist                                            447     448      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-10-02 02:41:39 +02:00
Maninder Singh
97f2f7ca7f Removes stray empty line from code 
This patch removes stray empty line from busybox code
reported by script find_stray_empty_lines

Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Akhilesh Kumar <akhilesh.k@samsung.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-07-13 03:25:46 +02:00
Denys Vlasenko
5f8daefb83 awk: fix handling of "if ... break ; else ..." - closes 7226 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2014-06-26 16:40:28 +02:00
Denys Vlasenko
bd0e221620 awk: fix a bug in argc counting in recent change 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2013-11-21 15:09:55 +01:00
Sven-Göran Bergh
f200f732f4 awk: optionally support -e AWK_PROG 
function                                             old     new   delta
awk_main                                             959     978     +19

Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2013-11-12 14:18:25 +01:00
Denys Vlasenko
7985bc109e awk: fix length(array) 
function                                             old     new   delta
evaluate                                            3526    3548     +22

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2013-10-12 04:51:54 +02:00
Bernhard Reutner-Fischer
a060a1ad96 awk: Fix handling of functions with empty body 
ammend b79a0fef99 to properly
handle functions defined in another scope.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
 2013-07-31 21:51:14 +02:00
Denys Vlasenko
1390a010b6 awk: use "long long" as integer type, not "int" 
Testcase:
awk "BEGIN{n=(2^31)-1; print n, int(n), n%1, ++n, int(n), n%1}"
2147483647 2147483647 0 2147483648 2147483648 0

(last three values weren't showing right)

function                                             old     new   delta
evaluate                                            3444    3458     +14
fmt_num                                              221     230      +9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2013-07-20 21:23:01 +02:00
Bernhard Reutner-Fischer
b79a0fef99 awk: Fix handling of functions with empty body 
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
 2013-03-13 09:47:07 +01:00
Denys Vlasenko
60cb48ca50 whitespace cleanup. no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2013-01-14 15:57:44 +01:00
Denys Vlasenko
df8066a78c awk: fix FS assignment behavior. Closes 5108 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2012-07-11 01:27:15 +02:00
Denys Vlasenko
ea664dde87 awk: make -F STR interpret escape sequences. Closes 5126 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2012-06-22 18:41:01 +02:00
Denys Vlasenko
7b46d11582 awk: fix a SEGV 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2011-09-11 00:30:56 +02:00
Denys Vlasenko
202a1b9284 awk: fix define name collision with BSD headers 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2011-09-10 04:51:09 +02:00
Denys Vlasenko
f65c5f5c54 awk: next_input_file can return NULL, don't SEGV in this case. 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2011-09-07 20:01:39 +02:00
Denys Vlasenko
66426760be *: remove "Options:" string from help texts 
function                                             old     new   delta
packed_usage                                       28706   28623     -83

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2011-06-05 03:58:28 +02:00