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ls has an ugly bug. ls uses an array of pointers, the elements of
which are all in a linked list. To free the elements, instead of
freeing all the elements in the array, array[0..nelements], it frees
by iterating the linked list starting at array[0], which it assumes is
the head of the list. Unfortunately, ls also sorts the array! So,
array[0] is no longer the head, but somewhere in the middle of the
linked list. This patch fixes this bug, and also adds an
ENABLE_FEATURE_CLEAN_UP stanza.
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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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yet more incorrect types
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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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getopt.h, whitespace changes, typos, etc.
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- small indent corrections
- remove unecessary malloc and free
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0000071: patch: implement "--color" option for ls coloring control
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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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dev_t. This is especially important now that the user space concept of a dev_t
and the kernel concept of a dev_t are divergant. The only bit of user space
allowed to know the number of major and minor bits is include/sys/sysmacros.h
(i.e. part of libc). When used with a current C library and a 2.6.x kernel,
this fix should allow BusyBox to support wide device major/minor numbers.
-Erik
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s/fileno\(stdout\)/STDOUT_FILENO/g
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I've noticed a bug in the "autowidth" feature more, and is probably in
others. The call to the function get_terminal_width_height() passes
in a file descriptor but that file descriptor is never used, instead
the ioctl() is called with 0. In more_main() the call to
get_terminal_width_height() passes 0 as the file descriptor instead of
fileno(cin). This isn't a problem when you more a file (e.g. "more
/etc/passwd") but when you pipe a file to it (e.g. "cat /etc/passwd |
more") the size of the terminal cannot be determined because file
descriptor 0 is not a terminal. The fix is simple, I've attached a
patch for more.c and get_terminal_width_height.c.
BAPper
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There was an extra blank line preceding the first directory.
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Hi, Glenn.
Current CVS "ls" applet have small problem: some options
ignoring. Last patch attached ;-)
--w
vodz
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to ensure proper fallback behavior on, i.e. serial consoles.
-Erik
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Latest BusyBox from CVS (Jul 7 2003).
File coreutils/ls.c
"if" at line 970 should be enclosed in #ifdef CONFIG_FEATURE_LS_SORTFILES
"if" at line 976 should be enclosed in #ifdef CONFIG_FEATURE_LS_TIMESTAMPS
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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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had failed. Explicitly 0 out errno to prevent that.
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color ls support, modifed by me to behave properly when not running
output to a terminal (i.e. 'ls | more')
-Erik
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-Erik
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-Erik
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make busybox be more uClinux friendly. I also adjusted Config.h for
uClinux so it will automagically disable apps the arn't going to
work without fork() and such.
-Erik
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have numbers printed as XXX.YU, so we need 6 digits not 4.
-Erik
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and then fixed up df, du, and ls to use the new interface. I also
fixed up some formatting issues in ls while I was in there.
-Erik
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