std::basic_filebuf<>: sync() after close() calls __rw_fseek() on closed file
----------------------------------------------------------------------------
Key: STDCXX-969
URL: https://issues.apache.org/jira/browse/STDCXX-969
Project: C++ Standard Library
Issue Type: Bug
Components: 27. Input/Output
Affects Versions: 4.2.1, 4.2.0, 4.1.4, 4.1.3, 4.1.2
Environment: All
Reporter: Farid Zaripov
Fix For: 4.2.2
{code:title=test.cpp}
#include <fstream>
int main (int argc, char* argv[])
{
std::ifstream fs (argv [0], std::ios::binary);
char c;
fs.get (c);
fs.close ();
fs.sync ();
return 0;
}
{code}
In the test above the fs.sync() calls __rw_fseek(0, ...), that leads to lseek
(-1, ...).
The proposed patch:
{code:title=fstream.cc.diff}
Index: include/fstream.cc
===================================================================
--- include/fstream.cc (revision 667432)
+++ include/fstream.cc (working copy)
@@ -106,6 +106,8 @@
_C_file = 0;
_C_cur_pos = _C_beg_pos = pos_type (off_type (-1));
+ this->setg(0, 0, 0);
+ this->setp(0, 0);
}
// rethrow the caught exception
@@ -119,6 +121,9 @@
// zero out the file pointer except when detaching fd
_C_file = 0;
_C_cur_pos = _C_beg_pos = pos_type (off_type (-1));
+
+ this->setg(0, 0, 0);
+ this->setp(0, 0);
}
return __retval;
{code}
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
