On 2019-02-17 09:42, Corinna Vinschen wrote: > On Feb 17 18:28, Andrey Repin wrote: >>> I uploaded a new Cygwin release 3.0.0-1. >> The redirection issue I mentioned for 3.0-0.9 is still happens. >> And I see the STC did not made it to the list. >> Hamsters were hungry, I guess... Let's try without attachments. >> TYPE "%SystemRoot%\win.ini" | diff -u "%SystemRoot%\win.ini" - > I'm baffled. diff calls fstat on descriptor 0. fstat returns > with st_mode set to S_IFIFO | S_IRUSR, so it *knows* descriptor > 0 is a pipe and thus not seekable. Nevertheless it calls lseek > just a bit later to seek back to the beginning of input.
Does not happen under mintty, only cmd, does the below help? > ver Microsoft Windows [Version 10.0.17763.292] > uname -srvmo CYGWIN_NT-10.0 3.0.0(0.336/5/3) 2019-02-16 13:21 x86_64 Cygwin > diff --version diff (GNU diffutils) 3.5 Packaged by Cygwin (3.5-2) Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Written by Paul Eggert, Mike Haertel, David Hayes, Richard Stallman, and Len Tower. > cat /var/log/setup.log | strace -o diff.strace diff -u /var/log/setup.log - diff: -: Illegal seek cat: write error: No space left on device > less diff.strace ... 41 63902 [main] diff 43744 _cygwin_istext_for_stdio: fd 3: opened as binary 359 64261 [main] diff 43744 setmode_helper: improbable, but 0 != 3 347 64608 [main] diff 43744 setmode_helper: improbable, but 1 != 3 349 64957 [main] diff 43744 setmode_helper: improbable, but 2 != 3 47 65004 [main] diff 43744 read: read(3, 0x600063390, 65536) blocking 93 65097 [main] diff 43744 fhandler_base::read: returning 65536, binary mode 43 65140 [main] diff 43744 read: 65536 = read(3, 0x600063390, 65536) 90 65230 [main] diff 43744 fhandler_base::set_flags: flags 0x10000, supplied_bin 0x0 39 65269 [main] diff 43744 fhandler_base::set_flags: O_TEXT/O_BINARY set in flags 0x10000 38 65307 [main] diff 43744 fhandler_base::set_flags: filemode set to binary 38 65345 [main] diff 43744 _setmode: (0<>, 0x10000) returning text 39 65384 [main] diff 43744 _cygwin_istext_for_stdio: fd 0: opened as binary 162 65546 [main] diff 43744 setmode_helper: file was binary now binary 286 65832 [main] diff 43744 setmode_helper: improbable, but 1 != 0 287 66119 [main] diff 43744 setmode_helper: improbable, but 2 != 0 ^^^ *No strace of _fwalk calling setmode_helper for comparison with 0, and continues to compare against 1 and 2? Should _fwalk return if !fp->flags?* 39 66158 [main] diff 43744 read: read(0, 0x600073490, 65536) blocking 109 66267 [main] diff 43744 fhandler_base::read: returning 65536, binary mode 47 66314 [main] diff 43744 read: 65536 = read(0, 0x600073490, 65536) 43 66357 [main] diff 43744 fhandler_pipe::lseek: (-65536, 1) 40 66397 [main] diff 43744 __set_errno: virtual off_t fhandler_pipe::lseek(off_t, int):165 setting errno 29 39 66436 [main] diff 43744 lseek64: -1 = lseek(0, -65536, 1), errno 29 ... -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
