On Sat, Mar 9, 2019 at 10:16 PM Jeffrey Walton wrote:
>
> Hi Everyone,
>
> I'm working on Solaris 11.3 i86pc. I'm building Wget 1.20.1 from sources.
>
> 'make check' is dying at:
>
> gcc -std=gnu11 -DHAVE_CONFIG_H -I. -I../src -I../src -I. -I../lib
> -I../lib -DSRCDIR=\"/export/home/jwalton/Build-Scripts/wget-1.20.1/fuzz\"
> -DTEST_RUN -I/usr/local/include -DNDEBUG -D_REENTRANT
> -Wno-unused-parameter -Wno-pedantic -I/usr/local/include
> -I/usr/local/include -I/usr/local/include -I/usr/local/include
> -DNDEBUG -g2 -O2 -march=native -fPIC -MT wget_css_fuzzer.o -MD -MP -MF
> .deps/wget_css_fuzzer.Tpo -c -o wget_css_fuzzer.o wget_css_fuzzer.c
> wget_css_fuzzer.c: In function 'LLVMFuzzerTestOneInput':
> wget_css_fuzzer.c:95:9: error: lvalue required as left operand of assignment
> stderr = fopen("/dev/null", "w");
> ^
> wget_css_fuzzer.c:106:9: error: lvalue required as left operand of assignment
> stderr = bak;
> ^
> gmake[3]: *** [wget_css_fuzzer.o] Error 1
> gmake[3]: Leaving directory
> `/export/home/jwalton/Build-Scripts/wget-1.20.1/fuzz'
> gmake[2]: *** [check-am] Error 2
> gmake[2]: Leaving directory
> `/export/home/jwalton/Build-Scripts/wget-1.20.1/fuzz'
> gmake[1]: *** [check-recursive] Error 1
> gmake[1]: Leaving directory `/export/home/jwalton/Build-Scripts/wget-1.20.1'
> gmake: *** [check] Error 2
> Failed to test Wget
>
> It looks like is included in wget_css_fuzzer.c
> (https://stackoverflow.com/a/47437649/608639). But I am wondering if
> the "macro" requirement is the thing going sideways.
>
> Any thoughts on a workaround?
includes and .
stdio_iso.h has the following (stdio_c99.h lacks them):
typedef __FILE FILE;
...
#if defined(__STDC__)
extern __FILE __iob[_NFILE];
#define stdin (&__iob[0])
#define stdout (&__iob[1])
#define stderr (&__iob[2])
#else
extern __FILE _iob[_NFILE];
#define stdin (&_iob[0])
#define stdout (&_iob[1])
#define stderr (&_iob[2])
#endif /* __STDC__ */
Then, in stdio_tag.h:
#define __FILE_TAG __FILE
And in stdio_impl.h:
#ifdef _LP64
struct __FILE_TAG {
long__pad[16];
};
#else
struct __FILE_TAG /* needs to be binary-compatible with old versions */
{
#ifdef _STDIO_REVERSE
unsigned char *_ptr; /* next character from/to here in buffer */
int _cnt; /* number of available characters in buffer */
#else
int _cnt; /* number of available characters in buffer */
unsigned char *_ptr; /* next character from/to here in buffer */
#endif
unsigned char *_base; /* the buffer */
...
};
#endif
I don't really see what the problem is. It looks like a potential lvalue to me.
