Hi,

See top of file (strace.attach2pid.grep) to learn how I applied
strace.

Regards,
Henri
terminal 1:
64-@@ grep . < fifo
terminal 2:
64-@@ strace -o bah --mask=syscall -p 5460 # Cygwin pid of the above process
terminal 3:
64-@@ echo aaa > fifo
Result: look for lseek64

--- Process 5460 created
--- Process 5460 loaded C:\Windows\System32\ntdll.dll at 0000000076d10000
--- Process 5460 thread 5632 created
--- Process 5460 loaded C:\Windows\System32\kernel32.dll at 0000000076bf0000
--- Process 5460 loaded C:\Windows\System32\KernelBase.dll at 000007fefca50000
--- Process 5460 loaded E:\Cygwin64\bin\cygwin1.dll at 0000000180040000
--- Process 5460 loaded E:\Cygwin64\bin\cygiconv-2.dll at 00000003f7df0000
--- Process 5460 loaded E:\Cygwin64\bin\cygintl-8.dll at 00000003f2540000
--- Process 5460 loaded E:\Cygwin64\bin\cygreadline7.dll at 00000003f0a20000
--- Process 5460 loaded E:\Cygwin64\bin\cygncursesw-10.dll at 00000003f1c20000
--- Process 5460 loaded C:\Windows\System32\advapi32.dll at 000007fefeed0000
--- Process 5460 loaded C:\Windows\System32\msvcrt.dll at 000007fefe320000
--- Process 5460 loaded C:\Windows\System32\sechost.dll at 000007fefe3c0000
--- Process 5460 loaded C:\Windows\System32\rpcrt4.dll at 000007fefecd0000
--- Process 5460 loaded C:\Windows\System32\cryptbase.dll at 000007fefc750000
--- Process 5460 thread 2824 created
--- Process 5460 thread 2824 exited with status 0x0
7151933 7151933 [main] bash 5460 open: 3 = open(fifo, 0x8000)
 1142 7153075 [main] bash 5460 close: close(0)
  399 7153474 [main] bash 5460 close: 0 = close(0)
  157 7153631 [main] bash 5460 dtable::dup3: 0 = dup3(3, 0, 0x0)
  134 7153765 [main] bash 5460 dup2: 0 = dup2(3, 0)
   82 7153847 [main] bash 5460 close: close(3)
   98 7153945 [main] bash 5460 fhandler_base::close: closing '/home/Henri/fifo' 
handle 0x124
   83 7154028 [main] bash 5460 close: 0 = close(3)
  132 7154160 [main] bash 5460 spawnve: spawnve (/usr/bin/grep, grep, 
0x60004FE40)
   57 7154217 [main] bash 5460 child_info_spawn::worker: mode = 3, prog_arg = 
/usr/bin/grep
   96 7154313 [main] bash 5460 normalize_posix_path: src /usr/bin/grep
  536 7154849 [main] bash 5460 symlink_info::check: not a symlink
   86 7154935 [main] bash 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\bin\grep.exe, 0xFFFFA8B0) (0x2000A)
 1611 7156546 [main] bash 5460 normalize_posix_path: src /usr/local/bin
  392 7156938 [main] bash 5460 symlink_info::check: not a symlink
   76 7157014 [main] bash 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\local\bin, 0xFFFFA1C0) (0x83000A)
  105 7157119 [main] bash 5460 normalize_posix_path: src /usr/bin
  313 7157432 [main] bash 5460 symlink_info::check: not a symlink
   73 7157505 [main] bash 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\bin, 0xFFFFA1C0) (0x82000A)
  102 7157607 [main] bash 5460 normalize_posix_path: src /drv/c/WINDOWS/system32
  377 7157984 [main] bash 5460 symlink_info::check: not a symlink
   78 7158062 [main] bash 5460 symlink_info::check: 0 = 
symlink.check(C:\WINDOWS\system32, 0xFFFFA1C0) (0x804022)
  101 7158163 [main] bash 5460 normalize_posix_path: src /drv/c/WINDOWS
  357 7158520 [main] bash 5460 symlink_info::check: not a symlink
   74 7158594 [main] bash 5460 symlink_info::check: 0 = 
symlink.check(C:\WINDOWS, 0xFFFFA1C0) (0x804022)
  102 7158696 [main] bash 5460 normalize_posix_path: src 
/drv/c/WINDOWS/System32/Wbem
  354 7159050 [main] bash 5460 symlink_info::check: not a symlink
   72 7159122 [main] bash 5460 symlink_info::check: 0 = 
symlink.check(C:\WINDOWS\System32\Wbem, 0xFFFFA1C0) (0x804022)
  101 7159223 [main] bash 5460 normalize_posix_path: src /home/Henri/bin
  306 7159529 [main] bash 5460 symlink_info::check: not a symlink
   69 7159598 [main] bash 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\home\Henri\bin, 0xFFFFA1C0) (0x83000A)
--- Process 5460 loaded C:\Windows\System32\apphelp.dll at 000007fefc6b0000
--- Process 820 created
 4517 7164115 [main] bash 5460 child_info_spawn::worker: pid 5460, prog_arg 
/usr/bin/grep, cmd line (null))
--- Process 820 loaded C:\Windows\System32\ntdll.dll at 0000000076d10000
--- Process 820 loaded C:\Windows\System32\kernel32.dll at 0000000076bf0000
--- Process 820 loaded C:\Windows\System32\KernelBase.dll at 000007fefca50000
--- Process 820 loaded E:\Cygwin64\bin\cygwin1.dll at 0000000180040000
--- Process 820 loaded E:\Cygwin64\bin\cygiconv-2.dll at 00000003f7df0000
--- Process 820 loaded E:\Cygwin64\bin\cygintl-8.dll at 00000003f2540000
--- Process 820 loaded E:\Cygwin64\bin\cygpcre-1.dll at 00000003f16c0000
--- Process 820 loaded C:\Windows\System32\advapi32.dll at 000007fefeed0000
--- Process 820 loaded C:\Windows\System32\msvcrt.dll at 000007fefe320000
--- Process 820 loaded C:\Windows\System32\sechost.dll at 000007fefe3c0000
--- Process 820 loaded C:\Windows\System32\rpcrt4.dll at 000007fefecd0000
--- Process 820 loaded C:\Windows\System32\cryptbase.dll at 000007fefc750000
 5899    5899 [main] grep (820) sigprocmask: 0 = sigprocmask (0, 0x0, 
0x1802F9BF0)
20906 7185021 [main] bash 5460! fhandler_base::close: closing 
'/home/Henri/fifo' handle 0x138
--- Process 5460 thread 3916 exited with status 0x0
--- Process 5460 exited with status 0x0
--- Process 820 thread 4856 created
 2391    8290 [main] grep 5460 time: 1538739969 = time(0x0)
  142    8432 [main] grep 5460 sigprocmask: 0 = sigprocmask (0, 0x0, 
0x600000100)
  220    8652 [main] grep 5460 _cygwin_istext_for_stdio: fd 0: opened as binary
   35    8687 [main] grep 5460 _cygwin_istext_for_stdio: fd 1: opened as binary
   32    8719 [main] grep 5460 _cygwin_istext_for_stdio: fd 2: opened as binary
31489   40208 [main] grep 5460 time: 1538739969 = time(0x0)
  252   40460 [main] grep 5460 stat64: entering
  156   40616 [main] grep 5460 normalize_posix_path: src /dev
  377   40993 [main] grep 5460 symlink_info::check: not a symlink
   56   41049 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\dev, 0xFFFFB740) (0x43000A)
  276   41325 [main] grep 5460 fhandler_base::fstat_helper: 0 = fstat 
(\??\E:\Cygwin64\dev, 0x1802F9A60) st_size=0, st_mode=040755, 
st_ino=6755399441107294st_atim=578E3ADD.13D4C4BC st_ctim=578E3ADD.13D4C4BC 
st_mtim=578E3ADD.13D4C4BC st_birthtim=578E3A68.314F50C
   67   41392 [main] grep 5460 stat_worker: 0 = 
(\??\E:\Cygwin64\dev,0x1802F9A60)
   85   41477 [main] grep 5460 fstat64: 0 = fstat(1, 0xFFFFCAE0)
   62   41539 [main] grep 5460 stat64: entering
   60   41599 [main] grep 5460 normalize_posix_path: src /dev/null
  266   41865 [main] grep 5460 time: 1538739969 = time(0x0)
   63   41928 [main] grep 5460 stat_worker: 0 = (\Device\Null,0xFFFFCB60)
 5156   47084 [main] grep 5460 isatty: 1 = isatty(1)
  277   47361 [main] grep 5460 fhandler_base::fstat_helper: 0 = fstat 
(\??\E:\Cygwin64\home\Henri\fifo.lnk, 0xFFFFC8C0) st_size=0, st_mode=010666, 
st_ino=11258999068428677st_atim=5BB59AD5.1CD30100 st_ctim=5BB59AD5.1CD30100 
st_mtim=5BB59AD5.1CD30100 st_birthtim=5BB59AD5.1CD30100
   60   47421 [main] grep 5460 fstat64: 0 = fstat(0, 0xFFFFC8C0)
   63   47484 [main] grep 5460 isatty: 0 = isatty(0)
  141   47625 [main] grep 5460 fcntl64: 98304 = fcntl(0, 3, 0x0)
  114   47739 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:1080
 status 0xC000000D -> windows error 87
   65   47804 [main] grep 5460 geterrno_from_win_error: windows error 87 == 
errno 22 <===== EINVAL!
   61   47865 [main] grep 5460 lseek64: -1 = lseek(0, 0, 1), errno 22
----- invoked from reset() in src/grep.c ?????
 1075   48940 [main] grep 5460 open: open(/usr/share/locale/locale.alias, 0x0)
   57   48997 [main] grep 5460 normalize_posix_path: src 
/usr/share/locale/locale.alias
  906   49903 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\locale.alias, 0xFFFFAF30) (0x3000A)
  180   50083 [main] grep 5460 symlink_info::check: not a symlink
   50   50133 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale, 0xFFFFAF30) (0x3000A)
   96   50229 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\locale\locale.alias, 0x108000)
   58   50287 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC0000034 -> windows error 2
   32   50319 [main] grep 5460 geterrno_from_win_error: windows error 2 == 
errno 2
   55   50374 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\locale\locale.alias, 0x108000)
   35   50409 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\locale\locale.alias, 0x8000)
   42   50451 [main] grep 5460 open: -1 = open(/usr/share/locale/locale.alias, 
0x8000), errno 2
  225   50676 [main] grep 5460 open: open(/usr/local/share/locale/locale.alias, 
0x0)
   30   50706 [main] grep 5460 normalize_posix_path: src 
/usr/local/share/locale/locale.alias
  205   50911 [main] grep 5460 symlink_info::check: not a symlink
   28   50939 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\local\share\locale\locale.alias, 0xFFFFAF20) 
(0x3000A)
  170   51109 [main] grep 5460 symlink_info::check: not a symlink
   28   51137 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\local\share\locale, 0xFFFFAF20) (0x3000A)
  230   51367 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\local\share, 0xFFFFAF20) (0x3000A)
  154   51521 [main] grep 5460 symlink_info::check: not a symlink
   45   51566 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\local, 0xFFFFAF20) (0x3000A)
   85   51651 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\local\share\locale\locale.alias, 0x108000)
   53   51704 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC000003A -> windows error 3
   35   51739 [main] grep 5460 geterrno_from_win_error: windows error 3 == 
errno 2
   54   51793 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\local\share\locale\locale.alias, 
0x108000)
   31   51824 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\local\share\locale\locale.alias, 
0x8000)
   32   51856 [main] grep 5460 open: -1 = 
open(/usr/local/share/locale/locale.alias, 0x8000), errno 2
  223   52079 [main] grep 5460 open: open(/usr/share/X11/locale/locale.alias, 
0x0)
   31   52110 [main] grep 5460 normalize_posix_path: src 
/usr/share/X11/locale/locale.alias
  186   52296 [main] grep 5460 symlink_info::check: not a symlink
   44   52340 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\X11\locale\locale.alias, 0xFFFFAF20) 
(0x3000A)
   85   52425 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\X11\locale\locale.alias, 0x108000)
  120   52545 [main] grep 5460 fhandler_base::set_flags: filemode set to binary
   55   52600 [main] grep 5460 fhandler_base::open: 1 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\X11\locale\locale.alias, 0x108000)
   31   52631 [main] grep 5460 fhandler_base::open_fs: 1 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\X11\locale\locale.alias, 
0x8000)
   32   52663 [main] grep 5460 open: 3 = 
open(/usr/share/X11/locale/locale.alias, 0x8000)
  131   52794 [main] grep 5460 _cygwin_istext_for_stdio: fd 3: opened as binary
  159   52953 [main] grep 5460 fhandler_base::fstat_helper: 0 = fstat 
(\??\E:\Cygwin64\usr\share\X11\locale\locale.alias, 0xFFFFC120) st_size=81609, 
st_mode=0100644, st_ino=1407374883573362st_atim=5959EFF4.2C16EFDC 
st_ctim=5959EFF4.2C16EFDC st_mtim=59472E3C.0 st_birthtim=5959EFF4.2C16EFDC
   36   52989 [main] grep 5460 fstat64: 0 = fstat(3, 0xFFFFC120)
   58   53047 [main] grep 5460 read: read(3, 0x60005B380, 65536) blocking
  108   53155 [main] grep 5460 read: 65536 = read(3, 0x60005B380, 65536)
 2770   55925 [main] grep 5460 read: read(3, 0x60005B380, 65536) blocking
   71   55996 [main] grep 5460 read: 16073 = read(3, 0x60005B380, 16073)
  643   56639 [main] grep 5460 read: read(3, 0x60005B380, 65536) blocking
   57   56696 [main] grep 5460 read: 0 = read(3, 0x60005B380, 0)
   31   56727 [main] grep 5460 close: close(3)
   31   56758 [main] grep 5460 fhandler_base::close: closing 
'/usr/share/X11/locale/locale.alias' handle 0x134
   42   56800 [main] grep 5460 close: 0 = close(3)
 5411   62211 [main] grep 5460 open: 
open(/usr/share/locale/en_US.UTF-8/LC_MESSAGES/grep.mo, 0x10000)
   61   62272 [main] grep 5460 normalize_posix_path: src 
/usr/share/locale/en_US.UTF-8/LC_MESSAGES/grep.mo
  318   62590 [main] grep 5460 symlink_info::check: not a symlink
   54   62644 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US.UTF-8\LC_MESSAGES\grep.mo, 
0xFFFFB110) (0x3000A)
  281   62925 [main] grep 5460 symlink_info::check: not a symlink
   54   62979 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US.UTF-8\LC_MESSAGES, 0xFFFFB110) 
(0x3000A)
  324   63303 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US.UTF-8, 0xFFFFB110) (0x3000A)
  199   63502 [main] grep 5460 symlink_info::check: not a symlink
   62   63564 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale, 0xFFFFB110) (0x3000A)
  111   63675 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\locale\en_US.UTF-8\LC_MESSAGES\grep.mo, 0x118000)
   74   63749 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC000003A -> windows error 3
   45   63794 [main] grep 5460 geterrno_from_win_error: windows error 3 == 
errno 2
   69   63863 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\locale\en_US.UTF-8\LC_MESSAGES\grep.mo,
 0x118000)
   31   63894 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\locale\en_US.UTF-8\LC_MESSAGES\grep.mo,
 0x18000)
   35   63929 [main] grep 5460 open: -1 = 
open(/usr/share/locale/en_US.UTF-8/LC_MESSAGES/grep.mo, 0x18000), errno 2
   82   64011 [main] grep 5460 open: 
open(/usr/share/locale/en_US.utf8/LC_MESSAGES/grep.mo, 0x10000)
   30   64041 [main] grep 5460 normalize_posix_path: src 
/usr/share/locale/en_US.utf8/LC_MESSAGES/grep.mo
  201   64242 [main] grep 5460 symlink_info::check: not a symlink
   30   64272 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US.utf8\LC_MESSAGES\grep.mo, 
0xFFFFB110) (0x3000A)
  170   64442 [main] grep 5460 symlink_info::check: not a symlink
   29   64471 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US.utf8\LC_MESSAGES, 0xFFFFB110) 
(0x3000A)
  408   64879 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US.utf8, 0xFFFFB110) (0x3000A)
  295   65174 [main] grep 5460 symlink_info::check: not a symlink
   85   65259 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale, 0xFFFFB110) (0x3000A)
  169   65428 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\locale\en_US.utf8\LC_MESSAGES\grep.mo, 0x118000)
   90   65518 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC000003A -> windows error 3
   69   65587 [main] grep 5460 geterrno_from_win_error: windows error 3 == 
errno 2
   81   65668 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\locale\en_US.utf8\LC_MESSAGES\grep.mo,
 0x118000)
   40   65708 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\locale\en_US.utf8\LC_MESSAGES\grep.mo,
 0x18000)
   45   65753 [main] grep 5460 open: -1 = 
open(/usr/share/locale/en_US.utf8/LC_MESSAGES/grep.mo, 0x18000), errno 2
  108   65861 [main] grep 5460 open: 
open(/usr/share/locale/en_US/LC_MESSAGES/grep.mo, 0x10000)
   66   65927 [main] grep 5460 normalize_posix_path: src 
/usr/share/locale/en_US/LC_MESSAGES/grep.mo
  340   66267 [main] grep 5460 symlink_info::check: not a symlink
   52   66319 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US\LC_MESSAGES\grep.mo, 
0xFFFFB110) (0x3000A)
  272   66591 [main] grep 5460 symlink_info::check: not a symlink
   54   66645 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US\LC_MESSAGES, 0xFFFFB110) 
(0x3000A)
  350   66995 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en_US, 0xFFFFB110) (0x3000A)
  281   67276 [main] grep 5460 symlink_info::check: not a symlink
   87   67363 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale, 0xFFFFB110) (0x3000A)
  137   67500 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\locale\en_US\LC_MESSAGES\grep.mo, 0x118000)
   69   67569 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC000003A -> windows error 3
   67   67636 [main] grep 5460 geterrno_from_win_error: windows error 3 == 
errno 2
   78   67714 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\locale\en_US\LC_MESSAGES\grep.mo, 
0x118000)
   42   67756 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\locale\en_US\LC_MESSAGES\grep.mo,
 0x18000)
   43   67799 [main] grep 5460 open: -1 = 
open(/usr/share/locale/en_US/LC_MESSAGES/grep.mo, 0x18000), errno 2
  109   67908 [main] grep 5460 open: 
open(/usr/share/locale/en.UTF-8/LC_MESSAGES/grep.mo, 0x10000)
   41   67949 [main] grep 5460 normalize_posix_path: src 
/usr/share/locale/en.UTF-8/LC_MESSAGES/grep.mo
  286   68235 [main] grep 5460 symlink_info::check: not a symlink
   52   68287 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en.UTF-8\LC_MESSAGES\grep.mo, 
0xFFFFB110) (0x3000A)
  247   68534 [main] grep 5460 symlink_info::check: not a symlink
   54   68588 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en.UTF-8\LC_MESSAGES, 0xFFFFB110) 
(0x3000A)
  341   68929 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en.UTF-8, 0xFFFFB110) (0x3000A)
  232   69161 [main] grep 5460 symlink_info::check: not a symlink
   67   69228 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale, 0xFFFFB110) (0x3000A)
  110   69338 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\locale\en.UTF-8\LC_MESSAGES\grep.mo, 0x118000)
   61   69399 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC000003A -> windows error 3
   44   69443 [main] grep 5460 geterrno_from_win_error: windows error 3 == 
errno 2
   70   69513 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\locale\en.UTF-8\LC_MESSAGES\grep.mo,
 0x118000)
   38   69551 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\locale\en.UTF-8\LC_MESSAGES\grep.mo,
 0x18000)
   42   69593 [main] grep 5460 open: -1 = 
open(/usr/share/locale/en.UTF-8/LC_MESSAGES/grep.mo, 0x18000), errno 2
  100   69693 [main] grep 5460 open: 
open(/usr/share/locale/en.utf8/LC_MESSAGES/grep.mo, 0x10000)
   39   69732 [main] grep 5460 normalize_posix_path: src 
/usr/share/locale/en.utf8/LC_MESSAGES/grep.mo
  251   69983 [main] grep 5460 symlink_info::check: not a symlink
   39   70022 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en.utf8\LC_MESSAGES\grep.mo, 
0xFFFFB110) (0x3000A)
  216   70238 [main] grep 5460 symlink_info::check: not a symlink
   40   70278 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en.utf8\LC_MESSAGES, 0xFFFFB110) 
(0x3000A)
  296   70574 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en.utf8, 0xFFFFB110) (0x3000A)
  195   70769 [main] grep 5460 symlink_info::check: not a symlink
   55   70824 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale, 0xFFFFB110) (0x3000A)
  106   70930 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\locale\en.utf8\LC_MESSAGES\grep.mo, 0x118000)
   59   70989 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC000003A -> windows error 3
   45   71034 [main] grep 5460 geterrno_from_win_error: windows error 3 == 
errno 2
   69   71103 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\locale\en.utf8\LC_MESSAGES\grep.mo,
 0x118000)
   43   71146 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\locale\en.utf8\LC_MESSAGES\grep.mo,
 0x18000)
   45   71191 [main] grep 5460 open: -1 = 
open(/usr/share/locale/en.utf8/LC_MESSAGES/grep.mo, 0x18000), errno 2
  101   71292 [main] grep 5460 open: 
open(/usr/share/locale/en/LC_MESSAGES/grep.mo, 0x10000)
   38   71330 [main] grep 5460 normalize_posix_path: src 
/usr/share/locale/en/LC_MESSAGES/grep.mo
  493   71823 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en\LC_MESSAGES\grep.mo, 0xFFFFB110) 
(0x3000A)
  196   72019 [main] grep 5460 symlink_info::check: not a symlink
   58   72077 [main] grep 5460 symlink_info::check: 0 = 
symlink.check(E:\Cygwin64\usr\share\locale\en\LC_MESSAGES, 0xFFFFB110) (0x3000A)
   96   72173 [main] grep 5460 fhandler_base::open: 
(\??\E:\Cygwin64\usr\share\locale\en\LC_MESSAGES\grep.mo, 0x118000)
   49   72222 [main] grep 5460 seterrno_from_nt_status: 
/ext/build/mknetrel/src/cygwin-snapshot-20180901-1/winsup/cygwin/fhandler.cc:683
 status 0xC0000034 -> windows error 2
   32   72254 [main] grep 5460 geterrno_from_win_error: windows error 2 == 
errno 2
   55   72309 [main] grep 5460 fhandler_base::open: 0 = 
fhandler_base::open(\??\E:\Cygwin64\usr\share\locale\en\LC_MESSAGES\grep.mo, 
0x118000)
   30   72339 [main] grep 5460 fhandler_base::open_fs: 0 = 
fhandler_disk_file::open(\??\E:\Cygwin64\usr\share\locale\en\LC_MESSAGES\grep.mo,
 0x18000)
   32   72371 [main] grep 5460 open: -1 = 
open(/usr/share/locale/en/LC_MESSAGES/grep.mo, 0x18000), errno 2
  581   72952 [main] grep 5460 write: 4 = write(2, 0x180325A68, 4)
  150   73102 [main] grep 5460 write: 1 = write(2, 0x18023CD21, 1)
  149   73251 [main] grep 5460 write: 1 = write(2, 0x18023CD15, 1)
  251   73502 [main] grep 5460 write: 16 = write(2, 0x10042B0AA, 16)
  246   73748 [main] grep 5460 write: 2 = write(2, 0x18023CD25, 2)
  150   73898 [main] grep 5460 write: 16 = write(2, 0x18023D040, 16)
  334   74232 [main] grep 5460 write: 1 = write(2, 0x18020F9C7, 1)
  263   74495 [main] grep 5460 close: close(1)
   76   74571 [main] grep 5460 close: 0 = close(1)
  245   74816 [main] grep 5460 close: close(2)
   74   74890 [main] grep 5460 close: 0 = close(2)
  239   75129 [main] grep 5460 do_exit: do_exit (512), exit_state 1
   29   75158 [main] grep 5460 void: 0x0 = signal (20, 0x1)
   30   75188 [main] grep 5460 void: 0x0 = signal (1, 0x1)
   28   75216 [main] grep 5460 void: 0x0 = signal (2, 0x1)
   30   75246 [main] grep 5460 void: 0x0 = signal (3, 0x1)
   41   75287 [main] grep 5460 fhandler_base::close: closing '/home/Henri/fifo' 
handle 0x138
  319   75606 [main] grep 5460 getpid: 5460 = getpid()
--- Process 820 thread 5808 exited with status 0x200
--- Process 820 exited with status 0x200

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