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msnfs41client: Patches for building on Win10/32bit+Win32 locking fixes+tests, 2025-09-30
Posted by Anonymous on Tue 30th Sep 2025 19:36
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From d14f195057c89bacd22953cae76f6af2840bfbd6 Mon Sep 17 00:00:00 2001 From: Cedric Blancher <cedric.blancher@gmail.com> Date: Tue, 30 Sep 2025 13:12:44 +0200 Subject: [PATCH 1/4] tests: Fix Windows 10/32bit+Cygwin3.3 build failures Fix Windows 10/32bit+Cygwin3.3 build failures. Signed-off-by: Roland Mainz <roland.mainz@nrubsig.org> --- tests/ea/Makefile | 4 ++-- tests/winfsinfo1/winfsinfo.c | 39 +++++++++++++++++++++++++++++++++++- 2 files changed, 40 insertions(+), 3 deletions(-) diff --git a/tests/ea/Makefile b/tests/ea/Makefile index e24e0dc..e647cb6 100644 --- a/tests/ea/Makefile +++ b/tests/ea/Makefile @@ -8,11 +8,11 @@ SIGNTOOL="/cygdrive/c/Program Files (x86)/Microsoft SDKs/ClickOnce/SignTool/sign all: nfs_ea.i686.exe nfs_ea.x86_64.exe nfs_ea.exe nfs_ea.i686.exe: main.c - clang -target i686-pc-windows-gnu -std=gnu17 -municode -Wall -Wextra -D_CRT_STDIO_ISO_WIDE_SPECIFIERS=1 -DUNICODE=1 -D_UNICODE=1 -isystem /usr/include/w32api/ddk -I../../include -g main.c -lntdll -o $@ + clang -target i686-pc-windows-gnu -std=gnu17 -municode -Wall -Wextra -DSTRSAFE_NO_DEPRECATE=1 -D_CRT_STDIO_ISO_WIDE_SPECIFIERS=1 -DUNICODE=1 -D_UNICODE=1 -isystem /usr/include/w32api/ddk -I../../include -g main.c -lntdll -o $@ bash -x -c '$(SIGNTOOL) sign /ph /fd "sha256" /sha1 "$${CERTIFICATE_THUMBPRINT%$$(printf "\r")}" $@' nfs_ea.x86_64.exe: main.c - clang -target x86_64-pc-windows-gnu -std=gnu17 -municode -Wall -Wextra -D_CRT_STDIO_ISO_WIDE_SPECIFIERS=1 -DUNICODE=1 -D_UNICODE=1 -isystem /usr/include/w32api/ddk -I../../include -g main.c -lntdll -o $@ + clang -target x86_64-pc-windows-gnu -std=gnu17 -municode -Wall -Wextra -DSTRSAFE_NO_DEPRECATE=1 -D_CRT_STDIO_ISO_WIDE_SPECIFIERS=1 -DUNICODE=1 -D_UNICODE=1 -isystem /usr/include/w32api/ddk -I../../include -g main.c -lntdll -o $@ bash -x -c '$(SIGNTOOL) sign /ph /fd "sha256" /sha1 "$${CERTIFICATE_THUMBPRINT%$$(printf "\r")}" $@' nfs_ea.exe: nfs_ea.x86_64.exe diff --git a/tests/winfsinfo1/winfsinfo.c b/tests/winfsinfo1/winfsinfo.c index b36fc6f..ab9ced3 100644 --- a/tests/winfsinfo1/winfsinfo.c +++ b/tests/winfsinfo1/winfsinfo.c @@ -504,14 +504,30 @@ int get_file_basic_info(const char *progname, const char *filename) TESTFBIA(FILE_ATTRIBUTE_OFFLINE); TESTFBIA(FILE_ATTRIBUTE_NOT_CONTENT_INDEXED); TESTFBIA(FILE_ATTRIBUTE_ENCRYPTED); +#ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM TESTFBIA(FILE_ATTRIBUTE_INTEGRITY_STREAM); +#endif /* FILE_ATTRIBUTE_INTEGRITY_STREAM */ +#ifdef FILE_ATTRIBUTE_VIRTUAL TESTFBIA(FILE_ATTRIBUTE_VIRTUAL); +#endif /* FILE_ATTRIBUTE_VIRTUAL */ +#ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA TESTFBIA(FILE_ATTRIBUTE_NO_SCRUB_DATA); +#endif /* FILE_ATTRIBUTE_NO_SCRUB_DATA */ +#ifdef FILE_ATTRIBUTE_EA TESTFBIA(FILE_ATTRIBUTE_EA); +#endif /* FILE_ATTRIBUTE_EA */ +#ifdef FILE_ATTRIBUTE_PINNED TESTFBIA(FILE_ATTRIBUTE_PINNED); +#endif /* FILE_ATTRIBUTE_PINNED */ +#ifdef FILE_ATTRIBUTE_UNPINNED TESTFBIA(FILE_ATTRIBUTE_UNPINNED); +#endif /* FILE_ATTRIBUTE_UNPINNED */ +#ifdef FILE_ATTRIBUTE_RECALL_ON_OPEN TESTFBIA(FILE_ATTRIBUTE_RECALL_ON_OPEN); +#endif /* FILE_ATTRIBUTE_RECALL_ON_OPEN */ +#ifdef FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS TESTFBIA(FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS); +#endif /* FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS */ /* * print any leftover flags not covered by |TESTFBIA(FILE_*)| @@ -602,14 +618,30 @@ int get_fileexinfostandard(const char *progname, const char *filename) TESTFEIS(FILE_ATTRIBUTE_OFFLINE); TESTFEIS(FILE_ATTRIBUTE_NOT_CONTENT_INDEXED); TESTFEIS(FILE_ATTRIBUTE_ENCRYPTED); +#ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM TESTFEIS(FILE_ATTRIBUTE_INTEGRITY_STREAM); +#endif /* FILE_ATTRIBUTE_INTEGRITY_STREAM */ +#ifdef FILE_ATTRIBUTE_VIRTUAL TESTFEIS(FILE_ATTRIBUTE_VIRTUAL); +#endif /* FILE_ATTRIBUTE_VIRTUAL */ +#ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA TESTFEIS(FILE_ATTRIBUTE_NO_SCRUB_DATA); +#endif /* FILE_ATTRIBUTE_NO_SCRUB_DATA */ +#ifdef FILE_ATTRIBUTE_EA TESTFEIS(FILE_ATTRIBUTE_EA); +#endif /* FILE_ATTRIBUTE_EA */ +#ifdef FILE_ATTRIBUTE_PINNED TESTFEIS(FILE_ATTRIBUTE_PINNED); +#endif /* FILE_ATTRIBUTE_PINNED */ +#ifdef FILE_ATTRIBUTE_UNPINNED TESTFEIS(FILE_ATTRIBUTE_UNPINNED); +#endif /* FILE_ATTRIBUTE_UNPINNED */ +#ifdef FILE_ATTRIBUTE_RECALL_ON_OPEN TESTFEIS(FILE_ATTRIBUTE_RECALL_ON_OPEN); +#endif /* FILE_ATTRIBUTE_RECALL_ON_OPEN */ +#ifdef FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS TESTFEIS(FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS); +#endif /* FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS */ /* * print any leftover flags not covered by |TESTFNOI(FILE_*)| @@ -798,7 +830,7 @@ done: return res; } - +#ifdef FILE_CS_FLAG_CASE_SENSITIVE_DIR static int get_filecasesensitiveinfo(const char *progname, const char *filename) { @@ -863,6 +895,7 @@ done: (void)CloseHandle(fileHandle); return res; } +#endif /* FILE_CS_FLAG_CASE_SENSITIVE_DIR */ static int get_getfiletime(const char *progname, const char *filename) @@ -1461,7 +1494,9 @@ void usage(void) "filestandardinfo|" "filenameinfo|" "filenormalizednameinfo|" +#ifdef FILE_CS_FLAG_CASE_SENSITIVE_DIR "filecasesensitiveinfo|" +#endif /* FILE_CS_FLAG_CASE_SENSITIVE_DIR */ "getfiletime|" "nfs3attr|" "fileremoteprotocolinfo|" @@ -1529,9 +1564,11 @@ int main(int ac, char *av[]) else if (!strcmp(subcmd, "getfiletime")) { return get_getfiletime(av[0], av[2]); } +#ifdef FILE_CS_FLAG_CASE_SENSITIVE_DIR else if (!strcmp(subcmd, "filecasesensitiveinfo")) { return get_filecasesensitiveinfo(av[0], av[2]); } +#endif /* FILE_CS_FLAG_CASE_SENSITIVE_DIR */ else if (!strcmp(subcmd, "nfs3attr")) { return get_nfs3attr(av[0], av[2]); } -- 2.51.0 From e99970a349215e8baa5eb4b9d038f382a70f1a50 Mon Sep 17 00:00:00 2001 From: Cedric Blancher <cedric.blancher@gmail.com> Date: Tue, 30 Sep 2025 13:42:38 +0200 Subject: [PATCH 2/4] tests: nfsbuildtest.ksh93: Fix VS2019 PATH on Windows 10/32bit Fix VS2019 PATH on Windows 10/32bit. Signed-off-by: Roland Mainz <roland.mainz@nrubsig.org> --- tests/nfsbuildtest/nfsbuildtest.ksh93 | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/tests/nfsbuildtest/nfsbuildtest.ksh93 b/tests/nfsbuildtest/nfsbuildtest.ksh93 index 234f09f..37024cb 100644 --- a/tests/nfsbuildtest/nfsbuildtest.ksh93 +++ b/tests/nfsbuildtest/nfsbuildtest.ksh93 @@ -552,9 +552,14 @@ function msnfs41client_build time make -j1 -f cygwin/Makefile build64 time make -j1 -f cygwin/Makefile installdest64 time make -j1 -f cygwin/Makefile bintarball64 - elif [[ -x '/cygdrive/c/Program Files (x86)/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/MSBuild.exe' ]] ; then + elif [[ -x '/cygdrive/c/Program Files/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/MSBuild.exe' || \ + -x '/cygdrive/c/Program Files (x86)/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/MSBuild.exe' ]] ; then # Visual Studio 19 64bit+32bit kernel codepath - export PATH="/cygdrive/c/Program Files (x86)/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/:$PATH" + if [[ -x '/cygdrive/c/Program Files/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/MSBuild.exe' ]] ; then + export PATH="/cygdrive/c/Program Files/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/:$PATH" + else + export PATH="/cygdrive/c/Program Files (x86)/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/:$PATH" + fi set -o errexit time make -j1 -f cygwin/Makefile build time make -j1 -f cygwin/Makefile installdest -- 2.51.0 From d3f5ad7eab174c6dea6a578063f6ed90b5ba5e92 Mon Sep 17 00:00:00 2001 From: Roland Mainz <roland.mainz@nrubsig.org> Date: Tue, 30 Sep 2025 17:23:38 +0200 Subject: [PATCH 3/4] daemon: Fix "ASSERTION 'length == 0' in '...\ms-nfs41-client\daemon\lock.c'/316 failed." Fix "ASSERTION 'length == 0' in '...\ms-nfs41-client\daemon\lock.c'/316 failed.". Signed-off-by: Cedric Blancher <cedric.blancher@gmail.com> --- daemon/lock.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/daemon/lock.c b/daemon/lock.c index 4066796..d41ef2c 100644 --- a/daemon/lock.c +++ b/daemon/lock.c @@ -312,12 +312,12 @@ static int parse_unlock(unsigned char *buffer, uint32_t length, nfs41_upcall *up status = safe_read(&buffer, &length, &args->count, sizeof(ULONG)); if (status) goto out; + args->buf_len = args->count*2L*sizeof(LONGLONG); + status = get_safe_read_bufferpos(&buffer, &length, args->buf_len, &args->buf); + if (status) goto out; EASSERT(length == 0); - args->buf = buffer; - args->buf_len = length; - DPRINTF(1, ("parsing NFS41_SYSOP_UNLOCK: count=%u\n", args->count)); out: return status; -- 2.51.0 From 583cb2a64714fd0c50d70d5ec4f8bc1dc4aff67d Mon Sep 17 00:00:00 2001 From: Roland Mainz <roland.mainz@nrubsig.org> Date: Tue, 30 Sep 2025 20:23:04 +0200 Subject: [PATCH 4/4] cygwin,tests: Add new Win32 (multi-client) locking API stress test "lockincfile1" Add new Win32 (multi-client) locking API stress test "lockincfile1", which locks a file, reads the last line which contains a "<tag> <value>" pair, and writes a new line with "<mytag> <value+1>", and then unlocks the file. This is intended to be a stress test running on one (contested) file from multiple clients. This patch also moves tests/filemmaptests/ into tests/misc/. Signed-off-by: Cedric Blancher <cedric.blancher@gmail.com> --- cygwin/Makefile | 2 + cygwin/Makefile.install | 9 +- cygwin/devel/msnfs41client.bash | 3 +- tests/lockincfile1/Makefile | 29 +++++ tests/lockincfile1/lockincfile1.c | 170 ++++++++++++++++++++++++++++++ 5 files changed, 208 insertions(+), 5 deletions(-) create mode 100644 tests/lockincfile1/Makefile create mode 100644 tests/lockincfile1/lockincfile1.c diff --git a/cygwin/Makefile b/cygwin/Makefile index 5156b5b..3e55f1c 100644 --- a/cygwin/Makefile +++ b/cygwin/Makefile @@ -26,6 +26,7 @@ $(PROJECT_BASEDIR_DIR)/tests/ea/nfs_ea.exe \ $(PROJECT_BASEDIR_DIR)/tests/lssparse/lssparse.exe \ $(PROJECT_BASEDIR_DIR)/tests/winfsinfo1/winfsinfo.exe \ $(PROJECT_BASEDIR_DIR)/tests/filemmaptests/qsortonmmapedfile1.exe \ + $(PROJECT_BASEDIR_DIR)/tests/lockincfile1/lockincfile1.exe \ $(PROJECT_BASEDIR_DIR)/tests/winclonefile/winclonefile.exe \ $(PROJECT_BASEDIR_DIR)/tests/winoffloadcopyfile/winoffloadcopyfile.exe \ $(PROJECT_BASEDIR_DIR)/tests/winrunassystem/winrunassystem.exe \ @@ -132,6 +133,7 @@ installdest_util: \ $(PROJECT_BASEDIR_DIR)/tests/lssparse/lssparse.exe \ $(PROJECT_BASEDIR_DIR)/tests/winfsinfo1/winfsinfo.exe \ $(PROJECT_BASEDIR_DIR)/tests/filemmaptests/qsortonmmapedfile1.exe \ + $(PROJECT_BASEDIR_DIR)/tests/lockincfile1/lockincfile1.exe \ $(PROJECT_BASEDIR_DIR)/tests/winclonefile/winclonefile.exe \ $(PROJECT_BASEDIR_DIR)/tests/winoffloadcopyfile/winoffloadcopyfile.exe \ $(PROJECT_BASEDIR_DIR)/tests/winrunassystem/winrunassystem.exe \ diff --git a/cygwin/Makefile.install b/cygwin/Makefile.install index 137f6c8..a25aee8 100644 --- a/cygwin/Makefile.install +++ b/cygwin/Makefile.install @@ -39,7 +39,6 @@ installdest: mkdir -p $(DESTDIR)/usr/share/msnfs41client/tests mkdir -p $(DESTDIR)/usr/share/msnfs41client/tests/misc mkdir -p $(DESTDIR)/usr/share/msnfs41client/tests/sparsefiles - mkdir -p $(DESTDIR)/usr/share/msnfs41client/tests/filemmaptests # # copy x86 binaries # @@ -152,9 +151,11 @@ installdest: cp "$(PROJECT_BASEDIR_DIR)/tests/winsg/winsg.i686.exe" $(DESTDIR)/bin/winsg.i686.exe cp "$(PROJECT_BASEDIR_DIR)/tests/ea/nfs_ea.x86_64.exe" $(DESTDIR)/bin/nfs_ea.x86_64.exe cp "$(PROJECT_BASEDIR_DIR)/tests/ea/nfs_ea.i686.exe" $(DESTDIR)/bin/nfs_ea.i686.exe - cp "$(PROJECT_BASEDIR_DIR)/tests/filemmaptests/qsortonmmapedfile1.x86_64.exe" $(DESTDIR)/usr/share/msnfs41client/tests/filemmaptests/qsortonmmapedfile1.x86_64.exe - cp "$(PROJECT_BASEDIR_DIR)/tests/filemmaptests/qsortonmmapedfile1.i686.exe" $(DESTDIR)/usr/share/msnfs41client/tests/filemmaptests/qsortonmmapedfile1.i686.exe - cp $(PROJECT_BASEDIR_DIR)/tests/filemmaptests/testqsortonmmapedfile1.ksh93 $(DESTDIR)/usr/share/msnfs41client/tests/filemmaptests/testqsortonmmapedfile1.ksh93 + cp "$(PROJECT_BASEDIR_DIR)/tests/filemmaptests/qsortonmmapedfile1.x86_64.exe" $(DESTDIR)/usr/share/msnfs41client/tests/misc/qsortonmmapedfile1.x86_64.exe + cp "$(PROJECT_BASEDIR_DIR)/tests/filemmaptests/qsortonmmapedfile1.i686.exe" $(DESTDIR)/usr/share/msnfs41client/tests/misc/qsortonmmapedfile1.i686.exe + cp $(PROJECT_BASEDIR_DIR)/tests/filemmaptests/testqsortonmmapedfile1.ksh93 $(DESTDIR)/usr/share/msnfs41client/tests/misc/testqsortonmmapedfile1.ksh93 + cp "$(PROJECT_BASEDIR_DIR)/tests/lockincfile1/lockincfile1.x86_64.exe" $(DESTDIR)/usr/share/msnfs41client/tests/misc/lockincfile1.x86_64.exe + cp "$(PROJECT_BASEDIR_DIR)/tests/lockincfile1/lockincfile1.i686.exe" $(DESTDIR)/usr/share/msnfs41client/tests/misc/lockincfile1.i686.exe cp $(PROJECT_BASEDIR_DIR)/tests/nfsbuildtest/nfsbuildtest.ksh93 $(DESTDIR)/usr/share/msnfs41client/tests/misc/nfsbuildtest.ksh93 cp $(PROJECT_BASEDIR_DIR)/tests/sparsefiles/testsparsefile1.ksh $(DESTDIR)/usr/share/msnfs41client/tests/sparsefiles/testsparsefile1.ksh cp $(PROJECT_BASEDIR_DIR)/tests/sparsefiles/testsparseexe1.ksh $(DESTDIR)/usr/share/msnfs41client/tests/sparsefiles/testsparseexe1.ksh diff --git a/cygwin/devel/msnfs41client.bash b/cygwin/devel/msnfs41client.bash index 2fbf2cd..4e44571 100755 --- a/cygwin/devel/msnfs41client.bash +++ b/cygwin/devel/msnfs41client.bash @@ -251,7 +251,8 @@ function nfsclient_install 'bin/nfs_ea' 'sbin/winrunassystem' 'sbin/nfs_globalmount' - 'usr/share/msnfs41client/tests/filemmaptests/qsortonmmapedfile1' + 'usr/share/msnfs41client/tests/misc/qsortonmmapedfile1' + 'usr/share/msnfs41client/tests/misc/lockincfile1' ) if [[ "${kernel_platform}" != 'i686' ]] ; then diff --git a/tests/lockincfile1/Makefile b/tests/lockincfile1/Makefile new file mode 100644 index 0000000..ab539dc --- /dev/null +++ b/tests/lockincfile1/Makefile @@ -0,0 +1,29 @@ +# +# Makefile for lockincfile1 +# + +# POSIX Makefile +SIGNTOOL="/cygdrive/c/Program Files (x86)/Microsoft SDKs/ClickOnce/SignTool/signtool.exe" + +all: \ + lockincfile1.i686.exe \ + lockincfile1.x86_64.exe \ + lockincfile1.exe + +lockincfile1.i686.exe: lockincfile1.c + clang -target i686-pc-windows-gnu -std=gnu17 -Wall -Wextra -DUNICODE=1 -D_UNICODE=1 -g -O lockincfile1.c -o $@ + bash -x -c '$(SIGNTOOL) sign /ph /fd "sha256" /sha1 "$${CERTIFICATE_THUMBPRINT%$$(printf "\r")}" $@' + +lockincfile1.x86_64.exe: lockincfile1.c + clang -target x86_64-pc-windows-gnu -std=gnu17 -Wall -Wextra -DUNICODE=1 -D_UNICODE=1 -g -O lockincfile1.c -o $@ + bash -x -c '$(SIGNTOOL) sign /ph /fd "sha256" /sha1 "$${CERTIFICATE_THUMBPRINT%$$(printf "\r")}" $@' + +lockincfile1.exe: lockincfile1.x86_64.exe + ln -s lockincfile1.x86_64.exe lockincfile1.exe + +clean: + rm -fv \ + lockincfile1.i686.exe \ + lockincfile1.x86_64.exe \ + lockincfile1.exe +# EOF. diff --git a/tests/lockincfile1/lockincfile1.c b/tests/lockincfile1/lockincfile1.c new file mode 100644 index 0000000..cde5822 --- /dev/null +++ b/tests/lockincfile1/lockincfile1.c @@ -0,0 +1,170 @@ +/* + * MIT License + * + * Copyright (c) 2025 Roland Mainz <roland.mainz@nrubsig.org> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * lockincfile1.c - lock file, read last line with "<tag> <value>", and write a new line "<mytag> <value+1>", unlock file + * + * Usage: + * $ clang -Wall -Wextra -O -g lockincfile1.c -o lockincfile1.exe + * $ rm -f contestedfile1.txt ; touch contestedfile1.txt + * + * Test run + * # on machine 1: + * $ time bash -c 'set -o errexit ; (for ((i=0 ; i < 400 ; i++)) ; do ./lockincfile1 contestedfile1.txt "aaa"; done) ; echo $?' + * # on machine 2: + * $ time bash -c 'set -o errexit ; (for ((i=0 ; i < 400 ; i++)) ; do ./lockincfile1 contestedfile1.txt "bbb"; done) ; echo $?' + * When both machines are finished the last line should match eregex ".+800" + */ +#include <windows.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <ctype.h> + +#define EXIT_USAGE (2) /* Traditional UNIX exit code for usage */ + +int main(int argc, char *av[]) +{ + if (argc != 3) { + (void)fprintf(stderr, "Usage:\n%s <filename> <tag>\n", av[0]); + return EXIT_USAGE; + } + + int retval = EXIT_FAILURE; + const char *fileName = av[1]; + const char *tag = av[2]; + long last_val = 0; + HANDLE h; + LARGE_INTEGER liFileSize; + char buffer[256]; + char writeBuffer[256]; + DWORD bytesRead, bytesWritten; + + h = CreateFileA(fileName, + GENERIC_READ | GENERIC_WRITE, + FILE_SHARE_READ | FILE_SHARE_WRITE, + NULL, + OPEN_EXISTING, + /*FILE_ATTRIBUTE_NORMAL*/FILE_FLAG_NO_BUFFERING, + NULL); + if (h == INVALID_HANDLE_VALUE) { + (void)fprintf(stderr, "%s: Cannot open file '%s', lasterr=%ld\n", + av[0], + av[1], + (long)GetLastError()); + (void)CloseHandle(h); + return EXIT_FAILURE; + } + + OVERLAPPED ov = { + .hEvent = 0, + .Offset = 0, + .OffsetHigh = 0 + }; + if (!LockFileEx(h, LOCKFILE_EXCLUSIVE_LOCK, 0, MAXDWORD, MAXDWORD, &ov)) { + (void)fprintf(stderr, + "%s: Locking failed, lasterr=%ld\n", + av[0], (long)GetLastError()); + (void)CloseHandle(h); + return EXIT_FAILURE; + } + + (void)GetFileSizeEx(h, &liFileSize); + + if (liFileSize.QuadPart > 0LL) { + LARGE_INTEGER liSeekPos; + if (liFileSize.QuadPart > (long long)(sizeof(buffer)-1)) + liSeekPos.QuadPart = (liFileSize.QuadPart - (sizeof(buffer)-1)); + else + liSeekPos.QuadPart = 0LL; + + (void)SetFilePointerEx(h, liSeekPos, NULL, FILE_BEGIN); + + if (!ReadFile(h, buffer, sizeof(buffer)-1, &bytesRead, NULL) || (bytesRead == 0)) { + (void)fprintf(stderr, + "%s: ReadFile() failed, lasterr=%ld\n", + av[0], (long)GetLastError()); + goto cleanup; + } + buffer[bytesRead] = '\0'; + + char *line_start = buffer; + char *p = buffer + bytesRead - 1; + + while ((p >= buffer) && + isspace((unsigned char)*p)) { + p--; + } + + if (p >= buffer) { + line_start = p; + while (line_start > buffer && *(line_start - 1) != '\n') { + line_start--; + } + + char *separator = NULL; + char *temp_p = p; + while (temp_p >= line_start) { + if (*temp_p == ' ' || *temp_p == '\t') { + separator = temp_p; + break; + } + temp_p--; + } + + if (separator && isdigit((unsigned char)*(separator + 1))) { + last_val = strtol(separator + 1, NULL, 10); + } + } + } + + LARGE_INTEGER liEndPos = { .QuadPart = 0LL }; + (void)SetFilePointerEx(h, liEndPos, NULL, FILE_END); + + if (liFileSize.QuadPart > 0LL) { + char lastChar; + LARGE_INTEGER liLastCharPos; + liLastCharPos.QuadPart = -1LL; + (void)SetFilePointerEx(h, liLastCharPos, NULL, FILE_END); + if (ReadFile(h, &lastChar, 1, &bytesRead, NULL) && (bytesRead == 1)) { + if (lastChar != '\n') { + (void)WriteFile(h, "\n", 1, &bytesWritten, NULL); + } + } + } + + int len = snprintf(writeBuffer, sizeof(writeBuffer), + "%s\t%ld\n", tag, (last_val + 1)); + (void)WriteFile(h, writeBuffer, len, &bytesWritten, NULL); + + (void)FlushFileBuffers(h); + retval = EXIT_SUCCESS; + +cleanup: + (void)UnlockFileEx(h, 0, MAXDWORD, MAXDWORD, &ov); + (void)CloseHandle(h); + + return retval; +} -- 2.51.0

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