Hello everyone,
Busybox's insmod fails to locate a module when that module is the only one
existing in the /lib/modules directory (with a unique name).
Example:
# find /lib/modules/ -type f
/lib/modules/kernel/drivers/char/bios.o
# insmod bios
insmod: bios.o: no module by that name found
# touch /lib/modules/dummy
# find /lib/modules/ -type f
/lib/modules/kernel/drivers/char/bios.o
/lib/modules/dummy
# insmod bios
Using /lib/modules/kernel/drivers/char/bios.o
As long as there is another file in the /lib/modules directory, insmod
finds it OK.
I tracked the problem down to 'check_module_name_match()' in insmod.c:
It returns TRUE when a match is found, and FALSE otherwise. In the case
where there is only one module in the /lib/modules directory (or more that
one module, but all with the same name), 'recursive_action()' will return
TRUE and we end up on line 4196 in 'insmod.c' which returns an error.
[The reason it works with more than one module with different
names is that in this case there will always be one not matching,
'recursive_action()' will return FALSE and we end up in line 4189.]
Now, from the implementation of 'recursive_action()' and from other
usages of it (tar.c, etc.), it seems to me that FALSE should be returned
to indicate that we want to stop the recursion, so TRUE and FALSE should
be inverted in 'check_module_name_match()'.
At the same time, 'recursive_action()' continues to recurse even after
the recursive call has returned FALSE; again in my understanding and
other usages of it, we can safely stop recursing at this point.
Here is my patch against 1.00-pre8:
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
The off_t type is not a consistent size; it depends on the kernel options
(something about large file support). Therefore, the format string for
printing an address is not always the same.
a directory into itself. It is harder to do this correctly
than it appears. Not trying at all seems a better compromise
for the time being, untill we can implement this correctly.
As Manuel points out, this is a flawed fix, and doesnt fix the
following:
mkdir -p cpa cpb cpc
cp -a cpa cpa/cpb/cpc
Attached what appears to be a more sane fix. Apply on top of previous.
Please confirm sanity.
I was adding -s/--symbolic-link support to busybox cp when I noticed a
bug with -r/-a. Test case:
mkdir -p test/out
cd test
busybox cp -a * out/
Will never return until we run out of open files or similar.
Coreutils cp on the other hand will error with "cannot copy a directory,
`out', into itself, `out'". Patch attached.
with 2.6.x asm/posix_types.h, which has done singularly evil thing
by yanking __kernel_dev_t and renaming it. The loop interface was
really poorly designed in the first place. The new 64 bit loop
interface looks to be somewhat less horrible, too bad it is only
present in 2.6.x kernels.
-Erik
out during the allocation process. When vodz changed it to be allocated on the
stack, he forgot to explicitly zero it, leaving its value filled with whatever
used to be sitting on the stack. It would garbage values, depending on the
garbage that happened to be sitting on the stack when the function was called.
The result was that applets using bb_getopt_ulflags() were showing
unpredictable behavior (such as segfaults), which naturally broke many things.
device ID iff the named file is a character or block special device. Otherwise
it is meaningless junk, in which case st_dev should be used. This was done
incorrectly, which could cause mount to display bogus mount info.
-Erik
cp does not truncate existing destinations. That is, after
running
echo foo > foo
echo fubar > fubar
cp foo fubar
the contents of fubar are
foo
r
instead of
foo
function as there is no gracefull way of handling failures.
Rename bb_getport to bb_lookup_port, allow a default port to be
specified so it always returns a correct value.
Modify ftpgetput/rdate/wget to use the new interface.
wget/rdate now use etc/services with a falback default value.
archive_xread can be replaced with bb_full_read, and archive_copy_file
with bb_copyfd*
bb_copyfd is split into two functions bb_copyfd_size and bb_copyfd_eof,
they share a common backend.
in order to fix the problems with round robin DNS reported
by Andrew Flegg:
http://busybox.net/lists/busybox/2003-October/009579.html
This removes the ipv6 specific xconnect dns lookups. I do
not see why that would need to be special cased for ipv6 as
was done, but that will just have to be tested.
So IPV6 people -- please test this change!
-Erik
In BusyBox v1.00-pre2,
commands like ls, df with -h option report a wrong file size for files larger than 4GBtye!!
For example,
when I execute 'ls -l', it reports
-rw-r--r-- 1 root root 5368709120 Aug 17 2003 large_stream.tp
when I execute 'ls -lh', I expect that
-rw-r--r-- 1 root root 5.0G Aug 17 2003 large_stream.tp
but it reports
-rw-r--r-- 1 root root 1.0G Aug 17 2003 large_stream.tp
I fixed this bug that...
Line 31 in libbb/human_readable.c and line 275 include/libbb.h
const char *make_human_readable_str(unsigned long size
=> const char *make_human_readable_str(unsigned long long size
It's OK!
I've reported this bug in April and it still
exists in 1.00-pre2. So I made patches for
both 0.60.x and 1.00-pre2. The patch is very
simple, just use strncmp instead of strcmp.
Please apply if it is OK.
Here's the procedure to test this problem:
Create a executable with very long name, say
'test_1234567890123456' and execute it. Try
using 'killall' or 'pidof' to find/kill this
program. Without this patch, you can't find
the program.
This moment have algoritmicaly problem, not overflow:
strcat(wrapped, wrapped) - may be looped.
Hand patch:
- else if (strstr(strcat(wrapped, wrapped), newmono))
+ else {
+ safe_strncpy(wrapped + lenwrap, wrapped, lenwrap + 1);
+ if (strstr(wrapped, newmono))
+}
--w
vodz
this patch fixes run_parts when it's called by ifupdown. 1) argv has to be a
NULL terminated char* array, not just a string. 2) run_parts now explicitly
sets the environment. this environment is populated from the
/etc/network/interfaces config file and is needed by the scripts in
/etc/network/if-pre-up.d/. when run-parts is called from the command line the
environment is taken from the current process.
Vladimir Oleynik then wrote:
You can simplify this if use:
+ bb_xasprintf(&buf[0], "/etc/network/if-%s.d", opt);
+ buf[1] = NULL;
+
+ run_parts(&buf, 2, environ);
+ free(buf[0]);
--w
vodz
Hi.
Last patch have new libbb function
vfork_rexec() for can use daemon() to uClinux system.
This patched daemons: syslog, klogd, inetd, crond.
This not tested! I havn`t this systems.
Also. Previous patch for feature request MD5 crypt password for
httpd don`t sended to this mailist on 07/15/03
(mailist have Pytom module problem?).
The previous patch included, and have testing.
--w
vodz
I've found a possible bug in libbb/interface.c, in function
if_readlist_proc(). This function calls get_name(), and passes
as an argument 'name', a buffer of 16 bytes (IFNAMSIZ). The
function get_name(), however, may use more than 16 bytes,
when it is searching for aliases. Even if you don't have an
alias interface, you can run into trouble if the interface
has received more than 99999999 bytes, in which case the
space between the interface name and the rx stats
disappears, as in the /proc/net/dev example below:
wan0.200:264573315 462080 ...
In this case get_name() correctly identifies the interface name
as "wan0.200", but to do that it uses 18 bytes of the 'name'
buffer, which could lead to an unpredictable error.
A simple solution would be to increase the size of the buffer:
Hello, I think the test for an unconfigured httpd is wrong in
the CVS (busybox-unstable-20030620.tar.bz2)
flg_deny_all is default 0
vodz then wrote:
Oops. You are right.
Also, this mistake haved from two place.
Last patch rewroted to my new get_ularg() function for overcompensate size
from this error found ;-)
Manuel,
I rewrite bb_getopt_ulflags() function for more universal usage.
My version support now:
- options with arguments (optional arg as GNU extension also)
- complementaly and/or incomplementaly and/or incongruously and/or list
options
- long_opt (all applets may have long option, add supporting is trivial)
This realisation full compatibile from your version.
Code size grow 480 bytes, but only coreutils/* over compensate this size
after using new function. Last patch reduced over 800 bytes and not full
applied to all. "mkdir" and "mv" applets have long_opt now for demonstrate
trivial addition support long_opt with usage new bb_getopt_ulflags().
Complementaly and/or incomplementaly and/or incongruously and/or list options
logic is not trivial, but new "cut" and "grep" applets using this logic
for examples with full demostrating. New "grep" applet reduced over 300
bytes.
Mark,
Also. I removed bug from "grep" applet.
$ echo a b | busybox grep -e a b
a b
a b
But right is printing one only.
--w
vodz
