Michał Berger has reported two issues:
- Repeatedly deleting and undoing the deletion of the last line
results in characters being lost from the end of the line.
- Deleting the bottom line twice then attempting to undo each of
these deletions results in a segfault.
The problem seems to be an incorrect test for whether the text buffer
is empty.
Reported-by: Michał Berger <michallinuxstuff@gmail.com>
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
If busybox is compiled with FEATURE_VI_REGEX_SEARCH enabled, command
":s/x/y/" searches not only in the current line, but continues search
after it. This makes range searches (":1,3s/x/y/") work incorrect. For
example file "./test":
1
2
3
$ vi ./test
:1,2s/3/e/
gives us:
1
2
e
function old new delta
char_search 213 241 +28
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The '-t' option for od is enabled by CONFIG_DESKTOP. So
check this config before using 'od -t' in test cases.
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Embedded scripts require a shell to be present in the BusyBox
binary. Allow either ash or hush to be used for this purpose.
If both are enabled ash takes precedence.
The size of the binary is unchanged in the default configuration:
both ash and hush are present but support for embedded scripts
isn't compiled into hush.
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The embedded script feature makes it easier to create applets with
duplicate names. Currently in such cases the build succeeds but
the resulting executable doesn't work as the developer intended.
Catch duplicate names when the applet tables are being generated
and make the build fail.
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
- Force a rebuild if a script in applets_sh is changed.
- Move the dummy usage messages for custom applets to usage.h and
change the name from 'dummy' to 'scripted'.
- Hide an error from gen_build_files.sh if an embed directory exists
but is empty.
- Tidy up embedded_scripts script.
v2: Remove a couple of unnecessary tests in embedded_scripts, as
pointed out by Xabier Oneca.
Drop the stripping of comments.
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
The parser reads from an already freed memory location, thereby causing
unpredictable results, in the following situation:
- ENABLE_ASH_EXPAND_PRMT is enabled
- heredoc is being parsed
- command substitution is used within heredoc
Examples where this bug crops up are (PS2 is set to "> "):
$ cat <<EOF
> `echo abc`
> EOF
-sh: O: not found
$ cat <<EOF
> $(echo abc)
> EOF
-sh: {garbage}: not found
The presumable reason is that setprompt_if() causes a nested expansion when
ENABLE_ASH_EXPAND_PRMT is enabled, therefore leaving "wordtext" in an unusable
state. However, when parseheredoc() is called, "tokpushback" is non-zero, which
causes the next call to xxreadtoken() to return TWORD, causing the caller to
use the invalid "wordtoken" instead of reading the next valid token.
The call chain is:
list()
-> peektoken() [sets tokpushback to 1]
-> parseheredoc()
-> setprompt_if()
-> pushstackmark()
-> expandstr()
-> readtoken1()
[sets lasttoken to TWORD, wordtoken points to expanded prompt]
-> popstackmark() [invalidates wordtoken, leaves lasttoken as is]
-> readtoken1()
-> ...parsebackq
-> list()
-> andor()
-> pipeline()
-> readtoken()
-> xxreadtoken()
[tokpushback non-zero, reuse lasttoken and wordtext]
Note that in almost all other contexts, each call to setprompt_if() is preceded
by setting "tokpushback" to zero. One exception is "oldstyle" backquote parsing
in readtoken1(), but there "tokpushback" is reset afterwards. The other
exception is nlprompt(), but this function is only used within readtoken1()
(but in contexts where no nested calls to xxreadtoken() occur) and xxreadtoken()
(where "tokpushback" is guaranteed to be zero).
function old new delta
parseheredoc 124 131 +7
Signed-off-by: Christoph Schulz <develop@kristov.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Before:
Trying libraries: crypt m resolv
Library crypt is not needed, excluding it
Library m is needed, can't exclude it (yet)
Library resolv is needed, can't exclude it (yet)
Library m is needed, can't exclude it (yet)
Library resolv is needed, can't exclude it (yet)
Final link with: m resolv
After:
Trying libraries: crypt m resolv
Library crypt is not needed, excluding it
Library m is needed, can't exclude it (yet)
Library resolv is needed, can't exclude it (yet)
Final link with: m resolv
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
