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* Cygwin: remove unused tmpbuf.hCorinna Vinschen2019-01-081-25/+0
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* fcntl.h: expose AT_EMPTY_PATH with _GNU_SOURCE onlyCorinna Vinschen2019-01-071-0/+2
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: linkat: support Linux-specific AT_EMPTY_PATH flagCorinna Vinschen2019-01-074-2/+25
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: open: support Linux-specific O_PATH flagCorinna Vinschen2019-01-078-4/+74
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: rename pipe.cc to fhandler_pipe.ccCorinna Vinschen2019-01-073-71/+71
| | | | | | move pipe syscalls to syscalls.cc Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: move fhandler_cygdrive methods into own source fileCorinna Vinschen2019-01-073-137/+159
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: drop redundant includes from fhandler_process_fd.ccCorinna Vinschen2019-01-061-14/+0
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: fix regression in O_TMPFILE | O_EXCL caseCorinna Vinschen2019-01-066-12/+31
| | | | | | | The new proc fd code accidentally allowed to linkat an O_TMPFILE even if the file has been opened with O_EXCL. This patch fixes it. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: document proc fd changesCorinna Vinschen2019-01-062-0/+13
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: introduce fhandler_process_fd and add stat(2) handlingCorinna Vinschen2019-01-066-164/+189
| | | | | | | | | | | | move special fd symlink code into own fhandler_process_fd class to simplify further additions to /proc/PID/fd/DESCRIPTOR symlink handling. Add a method to handle stat(2) on such a proc fd symlink by handle. This allows correct reply from stat(2) if the target file has been deleted. This eventually fixes `awk -f /dev/fd/3 3<<eof'. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: path_conv: add PATH_RESOLVE_PROCFD path_types flagCorinna Vinschen2019-01-063-5/+10
| | | | | | | | | | | path_conv now sets the PATH_RESOLVE_PROCFD flag in path_flags if the PC_SYM_NOFOLLOW_PROCFD pathconv_arg flag has been set on input *and* the file is actually a proc fd symlink. Add matching path_conv::follow_fd_symlink method for checking and use it in open(2). Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: path_conv: decouple path_types from mount typesCorinna Vinschen2019-01-066-144/+137
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Remove another unfortunate amalgamation: Mount flags (MOUNT_xxx) are converted to path_types (PATH_xxx) and mixed with non-mount path_types flags in the same storage, leading to a tangled, pell-mell usage of mount flags and path flags in path_conv and symlink_info. - There's also the case of PC_NONULLEMPTY. It's used in exactly one place with a path_conv constructor only used in this single place, just to override the automatic PC_NULLEMPTY addition when calling the other path_conv constructors. Crazily, PC_NONULLEMPTY is a define, no path_types flag, despite its name. - It doesn't help that the binary flag exists as mount and path flag, while the text flag only exists as path flag. This leads to mount code using path flags to set text/binary. Very confusing is the fact that a text mount/path flag is not actually required; the mount code sets the text flag on non binary mounts anyway, so there are only two states. However, to puzzle people a bit more, path_conv::binary wrongly implies there's a third, non-binary/non-text state. Clean up this mess: - Store path flags separately from mount flags in path_conv and symlink_info classes and change all checks and testing inline methods accordingly. - Make PC_NONULLEMPTY a simple path_types flag and drop the redundant path_check constructor. - Clean up the definition of pathconv_arg, path_types, and mount flags. Use _BIT expression, newly define in cygwin/bits.h. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: path_conv: decouple pathconv_flags from path_typesCorinna Vinschen2019-01-062-9/+13
| | | | | | | | | | | | | | | There's an unfortunate amalgamation of caller-provided pathconv_arg flags with path_types flags which in turn are mostly mount flags. This leads to a confusion of flag values in sylink_info::pflags and, in turn, in path_conv::path_flags. This patch decouples pathconv_flags from the other flags by making sure that a pathconv_flag is never copied into a variable used for path_types flags. Also, remove PATH_NO_ACCESS_CHECK since it's not necessary. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Mark all O_TMPFILEs as deletedCorinna Vinschen2019-01-061-5/+2
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Move O_TMPFILE to bin and allow linkat by handleCorinna Vinschen2019-01-063-1/+90
| | | | | | | Along the same lines as the previous patch: By reopening an O_TMPFILE by handle, we can now move the file to the bin at open time and thus free'ing up the parent dir and *still* open the file as /proc/PID/fd/DESCRIPTOR by linkat(2).
* Cygwin: try_to_bin: allow to move O_TMPFILE files into binCorinna Vinschen2019-01-061-26/+33
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: implement /proc/PID/fd/DESCRIPTOR reopening by handleCorinna Vinschen2019-01-066-5/+108
| | | | | | | | | | | | | Allows expressions along the lines of `cat /proc/self/fd/0 <<EOF'. The problem here is that the temporary file used for the here script has already been deleted by the shell. Opening by filename, as implemented so far, doesn't work because the file has been moved to the bin. Allow reopening files by handle the same way from another process as long as we have sufficient permissions on the foreign process. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: pinfo: add method to send a serialized path_conv and HANDLECorinna Vinschen2019-01-062-2/+38
| | | | | | | | | | To allow reopening a file open in another process by HANDLE, introduce a matching file_pathconv method, taking a file descriptor as parameter. The result is a serialized path_conv and a HANDLE value. The HANDLE is valid in the foreign process and MUST be duplicated into the target process before usage. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: path_conv: add serialization/deserialization facilityCorinna Vinschen2019-01-062-0/+67
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: path_conv: reorder private method declarationsCorinna Vinschen2019-01-061-3/+5
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: fhandler_base::open: allow to reopen file from handleCorinna Vinschen2019-01-061-1/+6
| | | | | | | | | | | So far io_handle is NULL when calling fhandler_base::open to open or create a file. Add a check for io_handle to allow priming the fhandler with a HANDLE value so we can reopen a file from a HANDLE on file systems supporting it. This allows to open already deleted files for further action. This will be used by open("/proc/PID/fd/DESCRIPTOR") scenarios. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: pipe: use /proc/PID/fd/... or /proc/self/fd/... nameCorinna Vinschen2019-01-051-4/+11
| | | | | | | Don't emit /dev/fd/... filename. This simplifies pipe path handling and avoids another symlink redirection. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: introduce virt_fdsymlink to simplify /proc/PID/fd symlink handlingCorinna Vinschen2019-01-053-2/+6
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: return correct FH_PROCESSFD for files under /proc/PID/fd subdirCorinna Vinschen2019-01-052-3/+11
| | | | | | This allows easier handling of fd symlinks. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: try_to_bin: fix typos in commentsCorinna Vinschen2019-01-051-2/+2
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: path_conv: nobody cares if a path had symlinks after the factCorinna Vinschen2019-01-052-8/+0
| | | | | | | remove set_has_symlinks/has_symlinks/PATH_HAS_SYMLINKS. Nobody's asking for this information. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: drop disabled O_TMPFILE POSIX unlink codeCorinna Vinschen2019-01-041-40/+0
| | | | | | | | | | | | | The commit message of commit 07e0a9584f9a5b2668c767ede0482a5fba498731 and the expectation set therein, are wrong. There's no POSIX semantics allowing to link a file with a link count of 0 and making it available in the file system again. In fact, the Linux linkat extension AT_EMPTY_PATH explicitely disallows to link a file descriptor to a file with a link count of 0, except for O_TMPFILE without O_EXCL. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Improve performance of memmemWilco Dijkstra2019-01-012-51/+137
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch significantly improves performance of memmem using a novel modified Horspool algorithm.  Needles up to size 256 use a bad-character table indexed by hashed pairs of characters to quickly skip past mismatches. Long needles use a self-adapting filtering step to avoid comparing the whole needle repeatedly. By limiting the needle length to 256, the shift table only requires 8 bits per entry, lowering preprocessing overhead and minimizing cache effects. This limit also implies worst-case performance is linear. Small needles up to size 2 use a dedicated linear search.  Very long needles use the Two-Way algorithm (to avoid increasing stack size inlining is now disabled). The performance gain is 6.6 times on English text on AArch64 using random needles with average size 8 (this is even faster than the recently improved strstr algorithm, so I'll update that in the near future). The size-optimized memmem has also been rewritten from scratch to get a 2.7x performance gain. Tested against GLIBC testsuite and randomized tests. Message-Id: <DB5PR08MB1030649D051FA8532A4512C883B20@DB5PR08MB1030.eurprd08.prod.outlook.com>
* Bump release to 3.1.0 for yearly snapshotnewlib-snapshot-20181231newlib-3.1.0Jeff Johnston2018-12-31106-1068/+1135
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* Cygwin: open(2): Change comment in disabled O_TMPFILE POSIX unlink codeCorinna Vinschen2018-12-261-5/+12
| | | | | | | | | | | - Turns out, the definition of POSIX unlink semantics is half-hearted so far: It's not possible to link an open file HANDLE if it has been deleted with POSIX semantics, nor is it possible to remove the delete disposition. This breaks linkat on an O_TMPFILE. Tested with W10 1809. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Change /proc/$PID/fd/<fd> symlink target for deleted filesCorinna Vinschen2018-12-261-3/+15
| | | | | | - As on Linux, print the file name with an attached " (deleted)" Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Add Christmas hacking release notesCorinna Vinschen2018-12-262-0/+52
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Add documentation for chattr and lsattrCorinna Vinschen2018-12-261-0/+129
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Add lsattr and chattr toolsCorinna Vinschen2018-12-263-1/+652
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Add FS_IOC_GETFLAGS and FS_IOC_SETFLAGS ioctlsCorinna Vinschen2018-12-254-0/+279
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: mkdir: create case-sensitive dirsCorinna Vinschen2018-12-251-0/+34
| | | | | | | On Windows 10 1803 and later, create dirs under the Cygwin installation dir as case sensitive, if WSL is installed. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: wincap: add wincap_10_1803, add has_case_sensitive_dirs itemCorinna Vinschen2018-12-252-1/+38
| | | | | | - Allow to disable the flag by calling disable_case_sensitive_dirs. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: cygheap: convert installation paths to UNICODE_STRINGSCorinna Vinschen2018-12-255-25/+30
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: utilize FILE_DISPOSITION_POSIX_SEMANTICSCorinna Vinschen2018-12-231-3/+76
| | | | | | | | | | | - short-circuit most code in unlink_nt since it's not necessary anymore if FILE_DISPOSITION_POSIX_SEMANTICS is supported. - Immediately remove O_TMPFILE from filesystem after creation. Disable code for now because we have to implement /proc/self/fd opening by handle first, lest linkat fails. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: support exFAT and fix remote FAT/FAT32 recognitionCorinna Vinschen2018-12-234-1/+12
| | | | | | | Newer FAT32 and exFAT add FILE_SUPPORTS_ENCRYPTION to their flags which wasn't handled by Cygwin yet. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: wincap: add wincap_10_1709, add has_posix_file_info itemCorinna Vinschen2018-12-232-6/+38
| | | | | | | | | | | | Various new file info class members adding important POSIX semantics have been added with W10 1709. We may want to utilize them, so add a matching wincaps. Rearrange checking the W10 build number to prefer the latest builds over the older builds. Rename wincap_10 to wincap_10_1507 for enhanced clarity. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: ntdll.h: Update _FILE_INFORMATION_CLASSCorinna Vinschen2018-12-231-309/+348
| | | | | | | | | | | | - Add missing members added in later OS versions - Rearrange accompanying FILE_foo_INFORMATION structs ordered by info class - Add promising FILE_foo_INFORMATION structs of later Windows 10 releases plus accompanying enums - Drop "Checked on 64 bit" comments since that's self-evident these days Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* RTEMS: Use __uint64_t for __ino_tSebastian Huber2018-12-201-1/+1
| | | | | | | FreeBSD uses a 64-bit ino_t since 2017-05-23. We need this for the pipe() support in libbsd. Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
* Plug routing sysctl leaks.markj2018-12-201-1/+5
| | | | | | | | | | | | Various structures exported by sysctl_rtsock() contain padding fields which were not being zeroed. Reported by: Thomas Barabosch, Fraunhofer FKIE Reviewed by: ae MFC after: 3 days Security: kernel memory disclosure Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D18333
* Cygwin: fix heap allocation on WOW64 and /3GB enabled 32 bit machinesCorinna Vinschen2018-12-191-11/+17
| | | | | | | | | The check for the TEB being allocated beyond the first 2GB area is not valid anymore. At least on W10 WOW64, the TEB is allocated in the lower 2GB even in large-address aware executables. Use VirtualQuery instead. It fails for invalid addresses so that's a simple enough test. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* nano-vfprintf_float.c: Fix check if negative for nans.Jon Beniston2018-12-131-1/+2
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* Fix powf overflow handling in non-nearest rounding modeSzabolcs Nagy2018-12-101-0/+10
| | | | | | | | | | | | | | | | | | | | | The threshold value at which powf overflows depends on the rounding mode and the current check did not take this into account. So when the result was rounded away from zero it could become infinity without setting errno to ERANGE. Example: pow(0x1.7ac7cp+5, 23) is 0x1.fffffep+127 + 0.1633ulp If the result goes above 0x1.fffffep+127 + 0.5ulp then errno is set, which is fine in nearest rounding mode, but powf(0x1.7ac7cp+5, 23) is inf in upward rounding mode powf(-0x1.7ac7cp+5, 23) is -inf in downward rounding mode and the previous implementation did not set errno in these cases. The fix tries to avoid affecting the common code path or calling a function that may introduce a stack frame, so float arithmetics is used to check the rounding mode and the threshold is selected accordingly.
* sys/time.h: Remove KASSERTSebastian Huber2018-12-041-12/+0
| | | | | | The KASSERT is only used by the FreeBSD kernel. Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
* Ensure that all values of ns, us and ms workimp2018-12-041-7/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | for {n,u,m}stosbt Integer overflows and wrong constants limited the accuracy of these functions and created situatiosn where sbttoXs(Xstosbt(Y)) != Y. This was especailly true in the ns case where we had millions of values that were wrong. Instead, used fixed constants because there's no way to say ceil(X) for integer math. Document what these crazy constants are. Also, use a shift one fewer left to avoid integer overflow causing incorrect results, and adjust the equasion accordingly. Document this. Allow times >= 1s to be well defined for these conversion functions (at least the Xstosbt). There's too many users in the tree that they work for >= 1s. This fixes a failure on boot to program firmware on the mlx4 NIC. There was a msleep(1000) in the code. Prior to my recent rounding changes, msleep(1000) worked, but msleep(1001) did not because the old code rounded to just below 2^64 and the new code rounds to just above it (overflowing, causing the msleep(1000) to really sleep 1ms). A test program to test all cases will be committed shortly. The test exaustively tries every value (thanks to bde for the test). Sponsored by: Netflix, Inc Differential Revision: https://reviews.freebsd.org/D18051
* When converting ns,us,ms to sbt, return the ceil()imp2018-12-041-3/+7
| | | | | | | | | | | of the result rather than the floor(). Returning the floor means that sbttoX(Xtosbt(y)) != y for almost all values of y. In practice, this results in a difference of at most 1 in the lsb of the sbintime_t. This difference is meaningless for all current users of these functions, but is important for the newly introduced sysctl conversion routines which implicitly rely on the transformation being idempotent. Sponsored by: Netflix, Inc
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