With coreutils 5.3.0-2 and various snapshots, I am seeing regressions in shred(1)caused by cygwin changes:
1.5.12: $ echo a > a $ shred --remove a $ echo $? 0 $ ls $ 20050131: $ echo a > a $ shred --remove a shred: .: fsync failed: Permission denied shred: .: fsync failed: Permission denied $ echo $? 1 $ ls $ 20050206 and 20050208: $ echo a > a $ shred --remove a shred: a: error truncating $ echo $? 1 $ ls a $ uname -a CYGWIN_NT-5.0 eblake 1.5.13s(0.118/4/2) 20050208 14:21:58 i686 unknown unknown Cygwin $ 20050206 introduced Corinna's changes to ftruncate, which might explain the current failure. I don't know when fsync regressed between 1.5.12 and 20050131, and it is probably still broken in 20050208 since shred bypasses the final fsync on . after detecting the earlier error on ftruncate. The following strace chunk shows that fd 3 (assigned to "./a") was open for writing as evidenced by the successful writev, so ftruncate should have succeeded instead of dying with EBADF: 71 127064 [main] shred 13776 writev: 1024 = write (3, 0x22A2F0, 1), errno 0 417 127481 [main] shred 13776 fhandler_base::lseek: lseek (/tmp/shred.test/a, 0, 1) 70 127551 [main] shred 13776 fhandler_base::lseek: setting file pointer to 0 (high), 0 (low) 68 127619 [main] shred 13776 fhandler_base::lseek: lseek (/tmp/shred.test/a, 0, 0) 63 127682 [main] shred 13776 fhandler_base::lseek: setting file pointer to 0 (high), 0 (low) 65 127747 [main] shred 13776 ftruncate64: -1 = ftruncate (3, 0) 612 128359 [main] shred 13776 fhandler_base::write: binary write shred: 573 128932 [main] shred 13776 fhandler_base::write: binary write a: error truncating I am also seeing the ftruncate errors when running automake, but since that invokes a perl script with many forks() before the ftruncate(), compared to the single process of shred, it was easier to use shred as the example of reproducibility during debugging. $ automake Makefile autom4te: cannot truncate autom4te.cache/requests at 0: Bad file descriptor automake: autoconf failed with exit status: 1 -- Eric Blake -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
