Commit Graph

22 Commits

Author SHA1 Message Date
Bartosz Golaszewski
59f8197624 i2cdump: don't use common_bufsiz1
Commit e6a2f4cc changed the way common_bufsiz1 works. Now it needs to
be initialized before using, but i2cdump wasn't updated by said patch.

Since the fact that we're using common_bufsiz1 here isn't obvious (no
G_INIT() macro, no other global variables), drop it and simply
allocate the integer array required for block reads on the stack.

Tested with i2c block read on a Lenovo Thinkpad laptop.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-06-24 03:58:43 +02:00
Denys Vlasenko
e6a2f4cc5a libbb: make bb_common_bufsiz1 1 kbyte, add capability to use bss tail for it
The config item is FEATURE_USE_BSS_TAIL. When it is off (default):

function                                             old     new   delta
read_config                                          210     228     +18
doCommands                                          2279    2294     +15
ipneigh_list_or_flush                                763     772      +9
ipaddr_list_or_flush                                1256    1261      +5
display_process_list                                1301    1306      +5
conspy_main                                         1378    1383      +5
do_lzo_compress                                      352     355      +3
do_lzo_decompress                                    565     567      +2
push                                                  46      44      -2
inetd_main                                          2136    2134      -2
uevent_main                                          421     418      -3
addLines                                              97      92      -5
bb_common_bufsiz1                                   8193    1024   -7169
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 8/5 up/down: 62/-7181)        Total: -7119 bytes
   text	   data	    bss	    dec	    hex	filename
 829850	   4086	   9080	 843016	  cdd08	busybox_old
 829901	   4086	   1904	 835891	  cc133	busybox_unstripped

FEATURE_USE_BSS_TAIL=y:

read_config                                          210     228     +18
doCommands                                          2279    2294     +15
ipneigh_list_or_flush                                763     772      +9
ipaddr_list_or_flush                                1256    1261      +5
display_process_list                                1301    1306      +5
conspy_main                                         1378    1383      +5
do_lzo_compress                                      352     355      +3
do_lzo_decompress                                    565     567      +2
inetd_main                                          2136    2134      -2
bb_common_bufsiz1                                   8193       -   -8193
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 8/1 up/down: 62/-8195)        Total: -8133 bytes
   text	   data	    bss	    dec	    hex	filename
 829850	   4086	   9080	 843016	  cdd08	busybox_old
 829911	   4086	    880	 834877	  cbd3d	busybox_unstripped

FIXME: setup_common_bufsiz() calls are missing.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-04-21 17:39:11 +02:00
Denys Vlasenko
2cf4591413 i2c_tools: suppress "'blen' may be used uninitialized in this function"
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-11-01 20:58:03 +01:00
Bartosz Golaszewski
5ed6989d80 i2cdump: display the numeric value for block read ioctl() errors
This makes busybox i2cdump compatible with the upstream version, which
also displays the numeric error value in case of a block read failure.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-11-01 20:55:10 +01:00
Bartosz Golaszewski
74bb9d5e63 i2cdump: bail-out if block read fails
We should bail-out if i2c_smbus_read_block_data() or
i2c_smbus_read_i2c_block_data() return 0 or less. Add the missing check
for the former and fix the existing for the latter.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-11-01 20:55:09 +01:00
Bartosz Golaszewski
1fe75b8ef1 i2cdump: use I2C block mode for the 'i' mode parameter
Currently we're calling i2c_smbus_read_block_data() for both 'i' and 's'
mode parameters. If the bus doesn't support SMBus block mode, then the
i2c access ioctl() fails. Make i2cdump behave compatibly with upstream
version by calling i2c_smbus_read_i2c_block_data() for I2C block.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-11-01 20:55:09 +01:00
Bartosz Golaszewski
1cde5f79d4 i2cdump: don't read block data in non-block modes
We currently read data twice in byte mode. Add a check to avoid calling
i2c_smbus_read_i2c_block_data() if we're not in I2C or SMBus block mode.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-11-01 20:55:09 +01:00
Bartosz Golaszewski
fc8eb056ea i2cdetect: coding style: add a space after 'for'
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-11-01 20:55:09 +01:00
Bartosz Golaszewski
99f025a499 i2cdetect: fix address skipping in auto mode
If the bus doesn't support SMBus Quick Write or Receive Byte commands
and we're running in auto mode all addresses will be skipped resulting
in an empty table being printed.

This is caused by not restoring the auto mode after it's been changed
for certain address ranges - we need an additional variable to hold the
temporary state.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-11-01 20:55:09 +01:00
Denys Vlasenko
7f3a2a2256 join some common strings, -400 bytes
function                                             old     new   delta
print_intel_cstates                                  499     511     +12
file_insert                                          355     364      +9
dpkg_main                                           2944    2940      -4
ifenslave_main                                       645     640      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 21/-9)              Total: 12 bytes
   text	   data	    bss	    dec	    hex	filename
 937564	    932	  17676	 956172	  e970c	busybox_old
 937164	    932	  17676	 955772	  e957c	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-10-08 11:24:44 +02:00
Denys Vlasenko
d60752f8c9 build system: -fno-builtin-printf
Benefits are: drops reference to out-of-line putchar(), fixes a few cases
of failed string merge.

function                                             old     new   delta
i2cdump_main                                        1488    1502     +14
sha256_process_block64                               423     433     +10
sendmail_main                                       1183    1185      +2
list_table                                          1114    1116      +2
i2cdetect_main                                      1235    1237      +2
fdisk_main                                          2852    2854      +2
builtin_type                                         119     121      +2
unicode_conv_to_printable2                           325     324      -1
scan_recursive                                       380     378      -2
mkfs_minix_main                                     2687    2684      -3
buffer_fill_and_print                                178     169      -9
putchar                                              152       -    -152
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 7/4 up/down: 34/-167)          Total: -133 bytes
   text    data     bss     dec     hex filename
 937788     932   17676  956396   e97ec busybox_old
 937564     932   17676  956172   e970c busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-10-07 22:42:45 +02:00
Bartosz Golaszewski
2beb52499e i2c-tools: rename remaining defines
Rename the defines not present in linux UAPI headers to better reflect
their purpose.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-09-21 13:15:01 +02:00
Bartosz Golaszewski
d9892fa0c3 i2c-tools: remove duplicate definitions
Most applets include linux' user API headers instead of duplicating
the definitions. Make it the case for i2c-tools as well.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-09-21 13:15:00 +02:00
Bartosz Golaszewski
d90899206d i2cdetect: use break instead of goto in list_i2c_busses_and_exit()
Since there are now more statements in the if block after the while loop
in list_i2c_busses_and_exit(), there's no need for a label.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-06-07 18:05:47 +02:00
Bartosz Golaszewski
aeb11a9496 i2cdump: code rework
Split i2cdump_main() into shorter functions. Simplify the code a bit.
Make block an array of ints so that we can store negative results of
read functions (fixes a bug found by Denys Vlasenko).

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-06-07 18:05:47 +02:00
Bartosz Golaszewski
2204472497 i2cdetect: add a check for (mode == DETECT_MODE_AUTO)
We should only warn the user about addresses to be skipped if
(mode == DETECT_MODE_AUTO).

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-06-07 18:05:47 +02:00
Bartosz Golaszewski
e545bf6723 i2cdetect: don't scan non-regular addresses without the '-a' option
Addresses 0x00-0x02 shouldn't be scanned by default. This patch makes
'first' default to 0x03 and only enables lower addresses if '-a' option
is passed

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-06-07 18:05:46 +02:00
Bartosz Golaszewski
314742747d i2cdetect: don't die on addresses already in use by drivers
We can't use i2c_set_slave_addr() in i2cdetect, as we have to check for
EBUSY after calling ioctl(I2C_SLAVE) and print 'UU' on busy addresses
instead of bailing-out.

While we're at it: reorder definitions of local vars in i2cdetect_main().

function                                             old     new   delta
i2cdetect_main                                       703     744     +41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 41/0)               Total: 41 bytes
   text	   data	    bss	    dec	    hex	filename
 826097	   4164	   9584	 839845	  cd0a5	busybox_old
 826145	   4164	   9584	 839893	  cd0d5	busybox_unstripped

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-06-07 18:05:34 +02:00
Bartosz Golaszewski
7ca5c51cc8 i2c-tools: only try /dev/i2c/* if opening /dev/i2c-* fails with ENOENT
Trying to access /dev/i2c/* on every error after opening /dev/i2c-* can
mislead users who e.g. don't have root access. Instead of bailing-out
with "permission denied" we currently print "no such file or directory".

Fix it by trying open("/dev/i2c/%d") only if we got ENOENT.

Upstream i2cdetect tries to get any info it can from /sys and /proc even
when invoked by an unprivileged user, but we don't want to add unnecessary
bloat.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-05-11 17:26:27 +02:00
Bartosz Golaszewski
b2cca32a37 i2c-tools: fix 'i2cdetect -l'
Calling 'i2cdetect -l' only displays usage and exits. Fix it by
correctly parsing command-line arguments.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-05-11 17:24:03 +02:00
Denys Vlasenko
8dff01d06a libbb: introduce and use is_prefixed_with()
function                                             old     new   delta
is_prefixed_with                                       -      18     +18
complete_username                                     78      77      -1
man_main                                             737     735      -2
fsck_device                                          429     427      -2
unpack_ar_archive                                     80      76      -4
strip_unsafe_prefix                                  105     101      -4
singlemount                                         1054    1050      -4
rtc_adjtime_is_utc                                    90      86      -4
resolve_mount_spec                                    88      84      -4
parse_one_line                                      1029    1025      -4
parse_conf                                          1460    1456      -4
may_wakeup                                            83      79      -4
loadkmap_main                                        219     215      -4
get_irqs_from_stat                                   103      99      -4
get_header_cpio                                      913     909      -4
findfs_main                                           79      75      -4
fbsplash_main                                       1230    1226      -4
load_crontab                                         776     771      -5
expand_vars_to_list                                 1151    1146      -5
date_main                                            881     876      -5
skip_dev_pfx                                          30      24      -6
make_device                                         2199    2193      -6
complete_cmd_dir_file                                773     767      -6
run_applet_and_exit                                  715     708      -7
uudecode_main                                        321     313      -8
pwdx_main                                            197     189      -8
execute                                              568     560      -8
i2cdetect_main                                      1186    1176     -10
procps_scan                                         1242    1230     -12
procps_read_smaps                                   1017    1005     -12
process_module                                       746     734     -12
patch_main                                          1903    1891     -12
nfsmount                                            3572    3560     -12
stack_machine                                        126     112     -14
process_timer_stats                                  449     435     -14
match_fstype                                         111      97     -14
do_ipaddr                                           1344    1330     -14
open_list_and_close                                  359     343     -16
get_header_tar                                      1795    1779     -16
prepend_new_eth_table                                340     323     -17
fsck_main                                           1811    1794     -17
find_iface_state                                      56      38     -18
dnsd_main                                           1321    1303     -18
base_device                                          179     158     -21
find_keyword                                         104      82     -22
handle_incoming_and_exit                            2785    2762     -23
parse_and_put_prompt                                 774     746     -28
modinfo                                              347     317     -30
find_action                                          204     171     -33
update_passwd                                       1470    1436     -34
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540)         Total: -522 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-03-12 17:48:34 +01:00
Bartosz Golaszewski
622a7aab2c i2cget, i2cset, i2cdetect, i2cdump: new applets
Add a minimal implementation of i2cget, i2cset, i2cdump and i2cdetect
tools. Supports most features of upstream i2c-tools.

function                                             old     new   delta
i2cdump_main                                           -    1444   +1444
i2cset_main                                            -    1239   +1239
i2cdetect_main                                         -     611    +611
list_i2c_busses_and_exit                               -     532    +532
packed_usage                                       29975   30438    +463
i2cget_main                                            -     380    +380
check_read_funcs                                       -     140    +140
i2c_funcs_tab                                          -     128    +128
confirm_action                                         -     100    +100
i2c_dev_open                                           -      57     +57
i2c_smbus_access                                       -      44     +44
confirm_or_abort                                       -      43     +43
check_funcs_test_end                                   -      39     +39
i2c_smbus_read_word_data                               -      38     +38
i2c_smbus_read_byte_data                               -      38     +38
i2c_smbus_read_byte                                    -      37     +37
i2c_set_slave_addr                                     -      32     +32
applet_names                                        2480    2512     +32
adap_descs                                             -      32     +32
i2c_set_pec                                            -      29     +29
get_funcs_matrix                                       -      21     +21
i2c_parse_data_addr                                    -      18     +18
i2c_parse_bus_addr                                     -      18     +18
i2c_bus_lookup                                         -      18     +18
i2c_smbus_write_byte                                   -      17     +17
applet_main                                         1440    1456     +16
will_skip                                              -      14     +14
no_support                                             -      11     +11
applet_nameofs                                       720     728      +8
applet_install_loc                                   180     182      +2
------------------------------------------------------------------------------
(add/remove: 26/0 grow/shrink: 5/0 up/down: 5601/0)          Total: 5601 bytes

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-02-10 03:16:25 +01:00