The memcpy invocations in the subCommand function, modified by this
commit, previously used memcpy with overlapping memory regions. This is
undefined behavior. On Alpine Linux, it causes BusyBox ed to crash since
we compile BusyBox with -D_FORTIFY_SOURCE=2 and our fortify-headers
implementation catches this source of undefined behavior [0]. The issue
can only be triggered if the replacement string is the same size or
shorter than the old string.
Looking at the code, it seems to me that a memmove(3) is what was
actually intended here, this commit modifies the code accordingly.
[0]: https://gitlab.alpinelinux.org/alpine/aports/-/issues/13504
Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
LOOP_CONFIGURE is added to Linux 5.8
function old new delta
NO_LOOP_CONFIGURE (old code):
set_loop 784 782 -2
LOOP_CONFIGURE:
set_loop 784 653 -131
TRY_LOOP_CONFIGURE:
set_loop 784 811 +27
Based on a patch by Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Extract subfunction set_loop_info() from set_loop()
function old new delta
set_loop 760 784 +24
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
function old new delta
set_loop 790 760 -30
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Extract subfunction get_next_free_loop() from set_loop()
Also fix miss free(try) when stat(try) and mknod fail
function old new delta
set_loop 807 790 -17
Fixes: 3448914e8cc5 ("mount,losetup: use /dev/loop-control is it exists")
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
When calling unzip -l the date and time output was missing big-endian
conversions.
Signed-off-by: Peter Kaestle <peter.kaestle@nokia.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Various tools are Linuxish and should thus only attempted to build on
Linux only. Some features are also Linux-only.
Also, libresolv is used on all GNU platforms, notably GNU/Hurd and
GNU/kfreeBSD.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Only in case the FEATURE_FBSET_FANCY configuration is enabled.
function old new delta
fbset_main 733 766 +33
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Not all options are actually implemented. In this case, return a message
and an error code to make it clear that the requested command has not
been executed.
function old new delta
.rodata 105200 105224 +24
fbset_main 747 733 -14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 24/-14) Total: 10 bytes
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
When /dev/loop-control exists and *device is empty,
the mount may fail if a concurrent mount is running.
function old new delta
set_loop 809 807 -2
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Running an applet with '--help' as its only argument is treated
as a special case. If additional arguments follow '--help' the
behaviour is inconsistent:
- applets which call single_argv() print help and do nothing else;
- applets which call getopt() report "unrecognized option '--help'"
and print help anyway;
- expr says "expr: syntax error" and doesn't print help;
- printenv silently ignores '--help', prints any other variables
and doesn't print help;
- realpath says "--help: No such file or directory", prints the path
of any other files and doesn't print help.
If the first argument is '--help' ignore any other arguments and print
help. This is more consistent and most likely what the user wanted.
See also commit 6bdfbc4cb (libbb: fix '--help' handling in
FEATURE_SH_NOFORK=y).
function old new delta
show_usage_if_dash_dash_help 75 69 -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-6) Total: -6 bytes
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
