[Bug binutils/15546] New: real_fopen does not set CLOEXEC in thread-safe way

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15546

            Bug ID: 15546
           Summary: real_fopen does not set CLOEXEC in thread-safe way
           Product: binutils
           Version: unspecified
            Status: NEW
          Severity: minor
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: tromey at redhat dot com

Right now, bfdio.c:real_fopen sets the CLOEXEC flag on
any files it opens.  Howevere, there is a window
between opening the file and setting this flag, during
which another thread could fork and exec.

The best fix would be to use O_CLOEXEC, or the fopen "e"
modifier, on platforms that support it.

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