Hi,
I found that the above mentioned functions can return with strange error
values in some cases: it is possible to return the previous value of
the 'errno' without modifying it.
e.g. the 'svn' executable reports strange errors due to this bug.
Those functions contain this code:
bytes = __getdents64(dir->dd_fd, dir->dd_buf, dir->dd_max);
if (bytes <= 0) {
*result = NULL;
ret = (bytes==0)? 0 : errno;
goto all_done;
...
AFAIK the functions __getdents64() and __getdents() return zero at the end of
the directory, and the 'errno' is not modified in this case (because it is
not an error), so the previous value of 'errno' can be returned by these
functions.
I suggest a modification:
bytes = __getdents64(dir->dd_fd, dir->dd_buf, dir->dd_max);
if (bytes == 0) {
*result = NULL;
ret = 0;
goto all_done;
} else if (bytes < 0) {
*result = NULL;
ret = (bytes==0)? 0 : errno;
goto all_done;
...
or something similar. I did not test it, because it is too complicated for me
to recompile the whole uClibc. It is just an idea.
Regards
K. Gy.
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