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Diffstat (limited to 'vere/pkg/c3/platform/windows/compat.c')
-rw-r--r--vere/pkg/c3/platform/windows/compat.c611
1 files changed, 611 insertions, 0 deletions
diff --git a/vere/pkg/c3/platform/windows/compat.c b/vere/pkg/c3/platform/windows/compat.c
new file mode 100644
index 0000000..d47f3f8
--- /dev/null
+++ b/vere/pkg/c3/platform/windows/compat.c
@@ -0,0 +1,611 @@
+#include "portable.h"
+#include <fcntl.h>
+#include <sys/utime.h>
+#include <windows.h>
+#include <tlhelp32.h>
+#include "errno.h"
+
+// set default CRT file mode to binary
+// note that mingw binmode.o does nothing
+#undef _fmode
+int _fmode = _O_BINARY;
+
+// set standard I/O fds to binary too, because
+// MSVCRT creates them before MingW sets _fmode
+static void __attribute__ ((constructor)) _set_stdio_to_binary()
+{
+ _setmode(0, _O_BINARY);
+ _setmode(1, _O_BINARY);
+ _setmode(2, _O_BINARY);
+}
+
+// from https://github.com/git/git/blob/master/compat/mingw.c
+// -----------------------------------------------------------------------
+
+int err_win_to_posix(DWORD winerr)
+{
+ int error = ENOSYS;
+ switch(winerr) {
+ case ERROR_ACCESS_DENIED: error = EACCES; break;
+ case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
+ case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
+ case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
+ case ERROR_ALREADY_EXISTS: error = EEXIST; break;
+ case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
+ case ERROR_BAD_COMMAND: error = EIO; break;
+ case ERROR_BAD_DEVICE: error = ENODEV; break;
+ case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
+ case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
+ case ERROR_BAD_FORMAT: error = ENOEXEC; break;
+ case ERROR_BAD_LENGTH: error = EINVAL; break;
+ case ERROR_BAD_PATHNAME: error = ENOENT; break;
+ case ERROR_BAD_PIPE: error = EPIPE; break;
+ case ERROR_BAD_UNIT: error = ENODEV; break;
+ case ERROR_BAD_USERNAME: error = EINVAL; break;
+ case ERROR_BROKEN_PIPE: error = EPIPE; break;
+ case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
+ case ERROR_BUSY: error = EBUSY; break;
+ case ERROR_BUSY_DRIVE: error = EBUSY; break;
+ case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
+ case ERROR_CANNOT_MAKE: error = EACCES; break;
+ case ERROR_CANTOPEN: error = EIO; break;
+ case ERROR_CANTREAD: error = EIO; break;
+ case ERROR_CANTWRITE: error = EIO; break;
+ case ERROR_CRC: error = EIO; break;
+ case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
+ case ERROR_DEVICE_IN_USE: error = EBUSY; break;
+ case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
+ case ERROR_DIRECTORY: error = EINVAL; break;
+ case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
+ case ERROR_DISK_CHANGE: error = EIO; break;
+ case ERROR_DISK_FULL: error = ENOSPC; break;
+ case ERROR_DRIVE_LOCKED: error = EBUSY; break;
+ case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
+ case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
+ case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
+ case ERROR_FILE_EXISTS: error = EEXIST; break;
+ case ERROR_FILE_INVALID: error = ENODEV; break;
+ case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
+ case ERROR_GEN_FAILURE: error = EIO; break;
+ case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
+ case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
+ case ERROR_INVALID_ACCESS: error = EACCES; break;
+ case ERROR_INVALID_ADDRESS: error = EFAULT; break;
+ case ERROR_INVALID_BLOCK: error = EFAULT; break;
+ case ERROR_INVALID_DATA: error = EINVAL; break;
+ case ERROR_INVALID_DRIVE: error = ENODEV; break;
+ case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
+ case ERROR_INVALID_FLAGS: error = EINVAL; break;
+ case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
+ case ERROR_INVALID_HANDLE: error = EBADF; break;
+ case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
+ case ERROR_INVALID_NAME: error = EINVAL; break;
+ case ERROR_INVALID_OWNER: error = EINVAL; break;
+ case ERROR_INVALID_PARAMETER: error = EINVAL; break;
+ case ERROR_INVALID_PASSWORD: error = EPERM; break;
+ case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
+ case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
+ case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
+ case ERROR_INVALID_WORKSTATION: error = EACCES; break;
+ case ERROR_IO_DEVICE: error = EIO; break;
+ case ERROR_IO_INCOMPLETE: error = EINTR; break;
+ case ERROR_LOCKED: error = EBUSY; break;
+ case ERROR_LOCK_VIOLATION: error = EACCES; break;
+ case ERROR_LOGON_FAILURE: error = EACCES; break;
+ case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
+ case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
+ case ERROR_MORE_DATA: error = EPIPE; break;
+ case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
+ case ERROR_NOACCESS: error = EFAULT; break;
+ case ERROR_NONE_MAPPED: error = EINVAL; break;
+ case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
+ case ERROR_NOT_READY: error = EAGAIN; break;
+ case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
+ case ERROR_NO_DATA: error = EPIPE; break;
+ case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
+ case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
+ case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
+ case ERROR_OPEN_FAILED: error = EIO; break;
+ case ERROR_OPEN_FILES: error = EBUSY; break;
+ case ERROR_OPERATION_ABORTED: error = EINTR; break;
+ case ERROR_OUTOFMEMORY: error = ENOMEM; break;
+ case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
+ case ERROR_PATH_BUSY: error = EBUSY; break;
+ case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
+ case ERROR_PIPE_BUSY: error = EBUSY; break;
+ case ERROR_PIPE_CONNECTED: error = EPIPE; break;
+ case ERROR_PIPE_LISTENING: error = EPIPE; break;
+ case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
+ case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
+ case ERROR_READ_FAULT: error = EIO; break;
+ case ERROR_SEEK: error = EIO; break;
+ case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
+ case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
+ case ERROR_SHARING_VIOLATION: error = EACCES; break;
+ case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
+ case ERROR_SUCCESS: error = 0; break;
+ case ERROR_SWAPERROR: error = ENOENT; break;
+ case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
+ case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
+ case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
+ case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
+ case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
+ case ERROR_WRITE_FAULT: error = EIO; break;
+ case ERROR_WRITE_PROTECT: error = EROFS; break;
+ }
+ return error;
+}
+
+int link(const char *path1, const char *path2)
+{
+ if ( CreateHardLinkA(path2, path1, NULL) ) {
+ return 0;
+ }
+
+ errno = err_win_to_posix(GetLastError());
+ return -1;
+}
+
+// from msys2 mingw-packages-dev patches
+// -----------------------------------------------------------------------
+
+static DWORD __map_mmap_prot_page(const int prot)
+{
+ DWORD protect = 0;
+
+ if (prot == PROT_NONE)
+ return protect;
+
+ if ((prot & PROT_EXEC) != 0)
+ {
+ protect = ((prot & PROT_WRITE) != 0) ?
+ PAGE_EXECUTE_READWRITE : PAGE_EXECUTE_READ;
+ }
+ else
+ {
+ protect = ((prot & PROT_WRITE) != 0) ?
+ PAGE_READWRITE : PAGE_READONLY;
+ }
+
+ return protect;
+}
+
+static DWORD __map_mmap_prot_file(const int prot)
+{
+ DWORD desiredAccess = 0;
+
+ if (prot == PROT_NONE)
+ return desiredAccess;
+
+ if ((prot & PROT_READ) != 0)
+ desiredAccess |= FILE_MAP_READ;
+ if ((prot & PROT_WRITE) != 0)
+ desiredAccess |= FILE_MAP_WRITE;
+ if ((prot & PROT_EXEC) != 0)
+ desiredAccess |= FILE_MAP_EXECUTE;
+
+ return desiredAccess;
+}
+
+void* mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off)
+{
+ HANDLE fm, h;
+
+ void * map = MAP_FAILED;
+
+ const DWORD dwFileOffsetLow = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)off : (DWORD)(off & 0xFFFFFFFFL);
+ const DWORD dwFileOffsetHigh = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)0 : (DWORD)((off >> 32) & 0xFFFFFFFFL);
+ const DWORD protect = __map_mmap_prot_page(prot);
+ const DWORD desiredAccess = __map_mmap_prot_file(prot);
+
+ errno = 0;
+
+ if (len == 0
+ /* Usupported protection combinations */
+ || prot == PROT_EXEC)
+ {
+ errno = EINVAL;
+ return MAP_FAILED;
+ }
+
+ if ((flags & MAP_ANON) == 0)
+ {
+ h = (HANDLE)_get_osfhandle(fildes);
+
+ if (h == INVALID_HANDLE_VALUE)
+ {
+ errno = EBADF;
+ return MAP_FAILED;
+ }
+ }
+ else h = INVALID_HANDLE_VALUE;
+
+ fm = CreateFileMapping(h, NULL, protect, 0, len, NULL);
+
+ if (fm == NULL)
+ {
+ errno = err_win_to_posix(GetLastError());
+ return MAP_FAILED;
+ }
+
+ map = MapViewOfFileEx(fm, desiredAccess, dwFileOffsetHigh, dwFileOffsetLow, len, addr);
+ errno = err_win_to_posix(GetLastError());
+
+ CloseHandle(fm);
+
+ if (map == NULL)
+ return MAP_FAILED;
+
+ if ((flags & MAP_FIXED) != 0 && map != addr)
+ {
+ UnmapViewOfFile(map);
+ errno = EEXIST;
+ return MAP_FAILED;
+ }
+
+ return map;
+}
+
+int munmap(void *addr, size_t len)
+{
+ if (UnmapViewOfFile(addr))
+ return 0;
+
+ errno = err_win_to_posix(GetLastError());
+ return -1;
+}
+
+int msync(void *addr, size_t len, int flags)
+{
+ if (FlushViewOfFile(addr, len))
+ return 0;
+
+ errno = err_win_to_posix(GetLastError());
+ return -1;
+}
+
+// -----------------------------------------------------------------------
+
+// vere uses kill() only to kill lockfile owner with SIGTERM or SIGKILL
+// Windows does not have signals, so I handle SIGKILL as TerminateProcess()
+// and return an error in all other cases
+int kill(pid_t pid, int sig)
+{
+ if (pid > 0 && sig == SIGKILL) {
+ HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
+
+ if (TerminateProcess(h, -1)) {
+ CloseHandle(h);
+ return 0;
+ }
+
+ errno = err_win_to_posix(GetLastError());
+ CloseHandle(h);
+ return -1;
+ }
+
+ errno = EINVAL;
+ return -1;
+}
+
+// libgcc built for mingw has included an implementation of mprotect
+// via VirtualProtect since olden days, but it takes int rather than size_t
+// and therefore fails or does unexpected things for >2GB blocks on 64-bit
+// https://github.com/gcc-mirror/gcc/blob/master/libgcc/libgcc2.c
+int mprotect (void *addr, size_t len, int prot)
+{
+ DWORD np, op;
+
+ if (prot == (PROT_READ | PROT_WRITE | PROT_EXEC))
+ np = PAGE_EXECUTE_READWRITE;
+ else if (prot == (PROT_READ | PROT_EXEC))
+ np = PAGE_EXECUTE_READ;
+ else if (prot == (PROT_EXEC))
+ np = PAGE_EXECUTE;
+ else if (prot == (PROT_READ | PROT_WRITE))
+ np = PAGE_READWRITE;
+ else if (prot == (PROT_READ))
+ np = PAGE_READONLY;
+ else if (prot == 0)
+ np = PAGE_NOACCESS;
+ else
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (VirtualProtect (addr, len, np, &op))
+ return 0;
+
+ // NB: return code of ntdll!RtlGetLastNtStatus() is useful
+ // for diagnosing obscure VirtualProtect failures
+ errno = err_win_to_posix(GetLastError());
+ return -1;
+}
+
+int utimes(const char *path, const struct timeval times[2])
+{
+ struct _utimbuf utb = {.actime = times[0].tv_sec, .modtime = times[1].tv_sec};
+ return _utime(path, &utb);
+}
+
+int fdatasync(int fildes)
+{
+ HANDLE h = (HANDLE)_get_osfhandle(fildes);
+
+ if (h == INVALID_HANDLE_VALUE)
+ {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (FlushFileBuffers(h))
+ {
+ errno = 0;
+ return 0;
+ }
+ else
+ {
+ errno = err_win_to_posix(GetLastError());
+ return -1;
+ }
+}
+
+intmax_t mdb_get_filesize(HANDLE han_u)
+{
+ LARGE_INTEGER li;
+ GetFileSizeEx(han_u, &li);
+ return li.QuadPart;
+}
+
+char *realpath(const char *path, char *resolved_path)
+{
+ // XX MAX_PATH
+ //
+ return _fullpath(resolved_path, path, MAX_PATH);
+}
+
+long sysconf(int name)
+{
+ SYSTEM_INFO si;
+
+ if ( _SC_PAGESIZE != name ) {
+ return -1;
+ }
+ GetNativeSystemInfo(&si);
+ return si.dwPageSize;
+}
+
+
+// musl memmem for windows
+
+static char *twobyte_memmem(const unsigned char *h, size_t k, const unsigned char *n)
+{
+ uint16_t nw = n[0]<<8 | n[1], hw = h[0]<<8 | h[1];
+ for (h++, k--; k; k--, hw = hw<<8 | *++h)
+ if (hw == nw) return (char *)h-1;
+ return 0;
+}
+
+static char *threebyte_memmem(const unsigned char *h, size_t k, const unsigned char *n)
+{
+ uint32_t nw = n[0]<<24 | n[1]<<16 | n[2]<<8;
+ uint32_t hw = h[0]<<24 | h[1]<<16 | h[2]<<8;
+ for (h+=2, k-=2; k; k--, hw = (hw|*++h)<<8)
+ if (hw == nw) return (char *)h-2;
+ return 0;
+}
+
+static char *fourbyte_memmem(const unsigned char *h, size_t k, const unsigned char *n)
+{
+ uint32_t nw = n[0]<<24 | n[1]<<16 | n[2]<<8 | n[3];
+ uint32_t hw = h[0]<<24 | h[1]<<16 | h[2]<<8 | h[3];
+ for (h+=3, k-=3; k; k--, hw = hw<<8 | *++h)
+ if (hw == nw) return (char *)h-3;
+ return 0;
+}
+
+#define MAX(a,b) ((a)>(b)?(a):(b))
+#define MIN(a,b) ((a)<(b)?(a):(b))
+
+#define BITOP(a,b,op) \
+ ((a)[(size_t)(b)/(8*sizeof *(a))] op (size_t)1<<((size_t)(b)%(8*sizeof *(a))))
+
+static char *twoway_memmem(const unsigned char *h, const unsigned char *z, const unsigned char *n, size_t l)
+{
+ size_t i, ip, jp, k, p, ms, p0, mem, mem0;
+ size_t byteset[32 / sizeof(size_t)] = { 0 };
+ size_t shift[256];
+
+ /* Computing length of needle and fill shift table */
+ for (i=0; i<l; i++)
+ BITOP(byteset, n[i], |=), shift[n[i]] = i+1;
+
+ /* Compute maximal suffix */
+ ip = -1; jp = 0; k = p = 1;
+ while (jp+k<l) {
+ if (n[ip+k] == n[jp+k]) {
+ if (k == p) {
+ jp += p;
+ k = 1;
+ } else k++;
+ } else if (n[ip+k] > n[jp+k]) {
+ jp += k;
+ k = 1;
+ p = jp - ip;
+ } else {
+ ip = jp++;
+ k = p = 1;
+ }
+ }
+ ms = ip;
+ p0 = p;
+
+ /* And with the opposite comparison */
+ ip = -1; jp = 0; k = p = 1;
+ while (jp+k<l) {
+ if (n[ip+k] == n[jp+k]) {
+ if (k == p) {
+ jp += p;
+ k = 1;
+ } else k++;
+ } else if (n[ip+k] < n[jp+k]) {
+ jp += k;
+ k = 1;
+ p = jp - ip;
+ } else {
+ ip = jp++;
+ k = p = 1;
+ }
+ }
+ if (ip+1 > ms+1) ms = ip;
+ else p = p0;
+
+ /* Periodic needle? */
+ if (memcmp(n, n+p, ms+1)) {
+ mem0 = 0;
+ p = MAX(ms, l-ms-1) + 1;
+ } else mem0 = l-p;
+ mem = 0;
+
+ /* Search loop */
+ for (;;) {
+ /* If remainder of haystack is shorter than needle, done */
+ if (z-h < l) return 0;
+
+ /* Check last byte first; advance by shift on mismatch */
+ if (BITOP(byteset, h[l-1], &)) {
+ k = l-shift[h[l-1]];
+ if (k) {
+ if (mem0 && mem && k < p) k = l-p;
+ h += k;
+ mem = 0;
+ continue;
+ }
+ } else {
+ h += l;
+ mem = 0;
+ continue;
+ }
+
+ /* Compare right half */
+ for (k=MAX(ms+1,mem); k<l && n[k] == h[k]; k++);
+ if (k < l) {
+ h += k-ms;
+ mem = 0;
+ continue;
+ }
+ /* Compare left half */
+ for (k=ms+1; k>mem && n[k-1] == h[k-1]; k--);
+ if (k <= mem) return (char *)h;
+ h += p;
+ mem = mem0;
+ }
+}
+
+void *memmem(const void *h0, size_t k, const void *n0, size_t l)
+{
+ const unsigned char *h = h0, *n = n0;
+
+ /* Return immediately on empty needle */
+ if (!l) return (void *)h;
+
+ /* Return immediately when needle is longer than haystack */
+ if (k<l) return 0;
+
+ /* Use faster algorithms for short needles */
+ h = memchr(h0, *n, k);
+ if (!h || l==1) return (void *)h;
+ k -= h - (const unsigned char *)h0;
+ if (l==2) return twobyte_memmem(h, k, n);
+ if (l==3) return threebyte_memmem(h, k, n);
+ if (l==4) return fourbyte_memmem(h, k, n);
+
+ return twoway_memmem(h, h+k, n, l);
+}
+
+uint32_t getppid()
+{
+ HANDLE hSnapshot;
+ PROCESSENTRY32 pe32;
+ DWORD ppid = 0, pid = GetCurrentProcessId();
+
+ hSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
+ __try{
+ if( hSnapshot == INVALID_HANDLE_VALUE ) __leave;
+
+ ZeroMemory( &pe32, sizeof( pe32 ) );
+ pe32.dwSize = sizeof( pe32 );
+ if( !Process32First( hSnapshot, &pe32 ) ) __leave;
+
+ do{
+ if( pe32.th32ProcessID == pid ){
+ ppid = pe32.th32ParentProcessID;
+ break;
+ }
+ }while( Process32Next( hSnapshot, &pe32 ) );
+
+ }
+ __finally{
+ if( hSnapshot != INVALID_HANDLE_VALUE ) CloseHandle( hSnapshot );
+ }
+ return ppid;
+}
+
+ssize_t pread(int fd, void *buf, size_t count, off_t offset)
+{
+ DWORD len = 0;
+
+ OVERLAPPED overlapped = {0};
+
+ overlapped.OffsetHigh = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)0 : (DWORD)((offset >> 32) & 0xFFFFFFFFL);
+ overlapped.Offset = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)offset : (DWORD)(offset & 0xFFFFFFFFL);
+
+ HANDLE h = (HANDLE)_get_osfhandle(fd);
+
+ if ( INVALID_HANDLE_VALUE == h ) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if ( !ReadFile(h, buf, count, &len, &overlapped) ) {
+ DWORD err = GetLastError();
+
+ if ( ERROR_HANDLE_EOF != err ) {
+ errno = err_win_to_posix(err);
+ return -1;
+ }
+ }
+
+ return (ssize_t)len;
+}
+
+ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset)
+{
+ DWORD len = 0;
+
+ OVERLAPPED overlapped = {0};
+
+ overlapped.OffsetHigh = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)0 : (DWORD)((offset >> 32) & 0xFFFFFFFFL);
+ overlapped.Offset = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)offset : (DWORD)(offset & 0xFFFFFFFFL);
+
+ HANDLE h = (HANDLE)_get_osfhandle(fd);
+
+ if ( INVALID_HANDLE_VALUE == h ) {
+ errno = EBADF;
+ return -1;
+ }
+
+ if ( !WriteFile(h, buf, count, &len, &overlapped) ) {
+ errno = err_win_to_posix(GetLastError());
+ return -1;
+ }
+
+ return (ssize_t)len;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-16 13:26:31 +0000