http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30162
--- Comment #51 from Janne Blomqvist <jb at gcc dot gnu.org> 2013-02-19 22:48:50 UTC --- (In reply to comment #22) > Revision 180701 removed all checks for special files in > unit.c:unit_truncate(). > As a consequence programs compiled with gfortran 4.6.3 and newer cannot to > write (formatted) to Unix named pipes as ftruncate() fails with EINVAL: > > (64-bit code) > > lseek(3, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek) > write(3, " Hello, world!\n", 15) = 15 > lseek(3, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek) > ftruncate(3, 18446744073709551615) = -1 EINVAL (Invalid argument) > > (32-bit code) > > _llseek(3, 0, 0xffba8fa0, SEEK_CUR) = -1 ESPIPE (Illegal seek) > write(3, " Hello, world!\n", 15) = 15 > _llseek(3, 0, 0xffba9080, SEEK_CUR) = -1 ESPIPE (Illegal seek) > ftruncate64(3, 18446744073709551615) = -1 EINVAL (Invalid argument) This bug (http://stackoverflow.com/questions/11780556/write-to-fifo-named-pipe , presumably) should be fixed by the patch at http://gcc.gnu.org/ml/gcc-patches/2013-02/msg00923.html
