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function old new delta
display_status - 1231 +1231
read_cmdline - 101 +101
parse_conf 1284 1303 +19
arith 2033 2042 +9
collect_blk 467 474 +7
fsck_main 1909 1911 +2
dhcprelay_main 1125 1122 -3
singlemount 4555 4547 -8
read_close 50 36 -14
get_lcm 123 105 -18
ed_main 3111 3084 -27
func_args 73 28 -45
procps_scan 732 658 -74
top_main 2187 899 -1288
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(add/remove: 2/0 grow/shrink: 4/8 up/down: 1369/-1477) Total: -108 bytes
text data bss dec hex filename
676048 2744 13968 692760 a9218 busybox_old
675940 2744 13968 692652 a91ac busybox_unstripped
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top: show cmdline, not comm field
(fixes problems with re-execed applets showing as processes with name "exe",
and not being found by pidof/killall by applet name)
function old new delta
find_pid_by_name 98 156 +58
procps_scan 692 732 +40
top_main 2724 2762 +38
find_pair 164 180 +16
collect_int 114 123 +9
cmp_main 547 555 +8
collect_fork 112 119 +7
collect_ctx 112 119 +7
read_package_field 253 257 +4
passwd_main 1983 1985 +2
process_stdin 435 433 -2
xstrtoul_range_sfx 229 226 -3
get_next_block 1852 1849 -3
arith 2042 2033 -9
sv_main 1236 1226 -10
singlemount 4690 4672 -18
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(add/remove: 0/0 grow/shrink: 10/6 up/down: 189/-45) Total: 144 bytes
text data bss dec hex filename
734789 3028 14400 752217 b7a59 busybox_old
734933 3028 14400 752361 b7ae9 busybox_unstripped
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function old new delta
skip_fields 16 15 -1
.rodata 144266 144258 -8
procps_scan 739 692 -47
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(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-56) Total: -56 bytes
text data bss dec hex filename
734845 3028 14400 752273 b7a91 busybox_old
734789 3028 14400 752217 b7a59 busybox_unstripped
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text data bss dec hex filename
734651 3040 14416 752107 b79eb busybox_old
734751 3040 14416 752207 b7a4f busybox_unstripped
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text data bss dec hex filename
1462 14 24 1500 5dc busybox.t2/procps/ps.o
1484 0 0 1484 5cc busybox.t3/procps/ps.o
3122 0 252 3374 d2e busybox.t1/procps/top.o
3117 0 0 3117 c2d busybox.t3/procps/top.o
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1373 14 24 1411 583 busybox.t1/procps/ps.o
1462 14 24 1500 5dc busybox.t2/procps/ps.o
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should make the output controllable either at runtime or buildtime as both statistics are quite useful
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Remove it, introduce saner bb_strtoXX.
Saved ~350 bytes.
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* size-optimize mapping code
* kill double close
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of open/read/close of /etc/passwd and /etc/group
dramatically (we were rereading those for each untarred file!!!)
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Use it where appropriate.
Stop scanning /etc/passwd *for every process*!!! (uid->username)
top: reduce memory usage - we won't save unneeded fields
from /proc info anymore. Downside: ~+250 bytes of code
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style fixes
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find_pid_by_name() was returning 0 or -1 in last array element,
but -1 was never checked. We can use just 0 intead.
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things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only
had one user), clean up lots of #includes... General cleanup pass. What I've
been doing for the last couple days.
And it conflicts! I've removed httpd.c from this checkin due to somebody else
touching that file. It builds for me. I have to catch a bus. (Now you know
why I'm looking forward to Mercurial.)
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- use shorter boilerplate while at it
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text data bss dec hex filename
889445 9392 1035784 1934621 1d851d busybox.gcc-4.2.orig
889297 9392 1035784 1934473 1d8489 busybox.gcc-4.2
889009 9820 1037860 1936689 1d8d31 busybox.gcc-4.1.orig
888817 9820 1037860 1936497 1d8c71 busybox.gcc-4.1
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definitions. (That should only be on prototypes.)
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my_getpwnam -> bb_xgetpwnam /* dies on error */
my_getgrnam -> bb_xgetgrnam /* dies on error */
my_getgrgid -> bb_getgrgid
my_getpwuid -> bb_getpwuid
my_getug -> bb_getug
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Hi,
I've spent the half night staring at the devilish my_getpwuid and my_getgrgid functions
trying to find out a way to avoid actual and future potential buffer overflow problems
without breaking existing code.
Finally I've found a not intrusive way to do this that surely doesn't break existing code
and fixes a couple of problems too.
The attached patch:
1) changes the behaviour of my_getpwuid and my_getgrgid to avoid potetntial buffer overflows
2) fixes all occurences of this function calls in tar.c , id.c , ls.c, whoami.c, logger.c, libbb.h.
3) The behaviour of tar, ls and logger is unchanged.
4) The behavior of ps with somewhat longer usernames messing up output is fixed.
5) The only bigger change was the increasing of size of the buffers in id.c to avoid
false negatives (unknown user: xxxxxx) with usernames longer than 8 chars.
The value i used ( 32 chars ) was taken from the tar header ( see gname and uname).
Maybe this buffers can be reduced a bit ( to 16 or whatever ), this is up to you.
6) The increase of size of the binary is not so dramatic:
size busybox
text data bss dec hex filename
239568 2300 36816 278684 4409c busybox
size busybox_fixed
text data bss dec hex filename
239616 2300 36816 278732 440cc busybox
7) The behaviour of whoami changed:
actually it prints out an username cut down to the size of the buffer.
This could be fixed by increasing the size of the buffer as in id.c or
avoid the use of my_getpwuid and use getpwuid directly instead.
Maybe this colud be also remain unchanged......
Please apply if you think it is ok to do so.
The diff applies on today's cvs tarball (2004-08-25).
Thanks in advance,
Ciao,
Tito
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does not provide PAGE_SHIFT for userland (because now mips-linux kernel
supports PAGESIZE other than 4K).
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I've attached my latest SE Linux patch for busybox against the latest CVS
version of busybox.
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maintaining it anymore, and it is now terribly out of date.
-Erik
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