*/
/*
- * Copyright (C) 2013 Eric Biggers
+ * Copyright (C) 2013-2016 Eric Biggers
*
* This file is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
#include "wimlib/error.h"
#include "wimlib/util.h"
+static int
+win32_error_to_errno(DWORD err_code)
+{
+ /* This mapping is that used in Cygwin.
+ * Some of these choices are arbitrary. */
+ switch (err_code) {
+ case ERROR_ACCESS_DENIED:
+ return EACCES;
+ case ERROR_ACTIVE_CONNECTIONS:
+ return EAGAIN;
+ case ERROR_ALREADY_EXISTS:
+ return EEXIST;
+ case ERROR_BAD_DEVICE:
+ return ENODEV;
+ case ERROR_BAD_EXE_FORMAT:
+ return ENOEXEC;
+ case ERROR_BAD_NETPATH:
+ return ENOENT;
+ case ERROR_BAD_NET_NAME:
+ return ENOENT;
+ case ERROR_BAD_NET_RESP:
+ return ENOSYS;
+ case ERROR_BAD_PATHNAME:
+ return ENOENT;
+ case ERROR_BAD_PIPE:
+ return EINVAL;
+ case ERROR_BAD_UNIT:
+ return ENODEV;
+ case ERROR_BAD_USERNAME:
+ return EINVAL;
+ case ERROR_BEGINNING_OF_MEDIA:
+ return EIO;
+ case ERROR_BROKEN_PIPE:
+ return EPIPE;
+ case ERROR_BUSY:
+ return EBUSY;
+ case ERROR_BUS_RESET:
+ return EIO;
+ case ERROR_CALL_NOT_IMPLEMENTED:
+ return ENOSYS;
+ case ERROR_CANNOT_MAKE:
+ return EPERM;
+ case ERROR_CHILD_NOT_COMPLETE:
+ return EBUSY;
+ case ERROR_COMMITMENT_LIMIT:
+ return EAGAIN;
+ case ERROR_CRC:
+ return EIO;
+ case ERROR_DEVICE_DOOR_OPEN:
+ return EIO;
+ case ERROR_DEVICE_IN_USE:
+ return EAGAIN;
+ case ERROR_DEVICE_REQUIRES_CLEANING:
+ return EIO;
+ case ERROR_DIRECTORY:
+ return ENOTDIR;
+ case ERROR_DIR_NOT_EMPTY:
+ return ENOTEMPTY;
+ case ERROR_DISK_CORRUPT:
+ return EIO;
+ case ERROR_DISK_FULL:
+ return ENOSPC;
+#ifdef ENOTUNIQ
+ case ERROR_DUP_NAME:
+ return ENOTUNIQ;
+#endif
+ case ERROR_EAS_DIDNT_FIT:
+ return ENOSPC;
+#ifdef ENOTSUP
+ case ERROR_EAS_NOT_SUPPORTED:
+ return ENOTSUP;
+#endif
+ case ERROR_EA_LIST_INCONSISTENT:
+ return EINVAL;
+ case ERROR_EA_TABLE_FULL:
+ return ENOSPC;
+ case ERROR_END_OF_MEDIA:
+ return ENOSPC;
+ case ERROR_EOM_OVERFLOW:
+ return EIO;
+ case ERROR_EXE_MACHINE_TYPE_MISMATCH:
+ return ENOEXEC;
+ case ERROR_EXE_MARKED_INVALID:
+ return ENOEXEC;
+ case ERROR_FILEMARK_DETECTED:
+ return EIO;
+ case ERROR_FILENAME_EXCED_RANGE:
+ return ENAMETOOLONG;
+ case ERROR_FILE_CORRUPT:
+ return EEXIST;
+ case ERROR_FILE_EXISTS:
+ return EEXIST;
+ case ERROR_FILE_INVALID:
+ return ENXIO;
+ case ERROR_FILE_NOT_FOUND:
+ return ENOENT;
+ case ERROR_HANDLE_DISK_FULL:
+ return ENOSPC;
+#ifdef ENODATA
+ case ERROR_HANDLE_EOF:
+ return ENODATA;
+#endif
+ case ERROR_INVALID_ADDRESS:
+ return EINVAL;
+ case ERROR_INVALID_AT_INTERRUPT_TIME:
+ return EINTR;
+ case ERROR_INVALID_BLOCK_LENGTH:
+ return EIO;
+ case ERROR_INVALID_DATA:
+ return EINVAL;
+ case ERROR_INVALID_DRIVE:
+ return ENODEV;
+ case ERROR_INVALID_EA_NAME:
+ return EINVAL;
+ case ERROR_INVALID_EXE_SIGNATURE:
+ return ENOEXEC;
+#ifdef EBADRQC
+ case ERROR_INVALID_FUNCTION:
+ return EBADRQC;
+#endif
+ case ERROR_INVALID_HANDLE:
+ return EBADF;
+ case ERROR_INVALID_NAME:
+ return ENOENT;
+ case ERROR_INVALID_PARAMETER:
+ return EINVAL;
+ case ERROR_INVALID_SIGNAL_NUMBER:
+ return EINVAL;
+ case ERROR_IOPL_NOT_ENABLED:
+ return ENOEXEC;
+ case ERROR_IO_DEVICE:
+ return EIO;
+ case ERROR_IO_INCOMPLETE:
+ return EAGAIN;
+ case ERROR_IO_PENDING:
+ return EAGAIN;
+ case ERROR_LOCK_VIOLATION:
+ return EBUSY;
+ case ERROR_MAX_THRDS_REACHED:
+ return EAGAIN;
+ case ERROR_META_EXPANSION_TOO_LONG:
+ return EINVAL;
+ case ERROR_MOD_NOT_FOUND:
+ return ENOENT;
+#ifdef EMSGSIZE
+ case ERROR_MORE_DATA:
+ return EMSGSIZE;
+#endif
+ case ERROR_NEGATIVE_SEEK:
+ return EINVAL;
+ case ERROR_NETNAME_DELETED:
+ return ENOENT;
+ case ERROR_NOACCESS:
+ return EFAULT;
+ case ERROR_NONE_MAPPED:
+ return EINVAL;
+ case ERROR_NONPAGED_SYSTEM_RESOURCES:
+ return EAGAIN;
+#ifdef ENOLINK
+ case ERROR_NOT_CONNECTED:
+ return ENOLINK;
+#endif
+ case ERROR_NOT_ENOUGH_MEMORY:
+ return ENOMEM;
+ case ERROR_NOT_OWNER:
+ return EPERM;
+#ifdef ENOMEDIUM
+ case ERROR_NOT_READY:
+ return ENOMEDIUM;
+#endif
+ case ERROR_NOT_SAME_DEVICE:
+ return EXDEV;
+ case ERROR_NOT_SUPPORTED:
+ return ENOSYS;
+ case ERROR_NO_DATA:
+ return EPIPE;
+ case ERROR_NO_DATA_DETECTED:
+ return EIO;
+#ifdef ENOMEDIUM
+ case ERROR_NO_MEDIA_IN_DRIVE:
+ return ENOMEDIUM;
+#endif
+#ifdef ENMFILE
+ case ERROR_NO_MORE_FILES:
+ return ENMFILE;
+#endif
+#ifdef ENMFILE
+ case ERROR_NO_MORE_ITEMS:
+ return ENMFILE;
+#endif
+ case ERROR_NO_MORE_SEARCH_HANDLES:
+ return ENFILE;
+ case ERROR_NO_PROC_SLOTS:
+ return EAGAIN;
+ case ERROR_NO_SIGNAL_SENT:
+ return EIO;
+ case ERROR_NO_SYSTEM_RESOURCES:
+ return EFBIG;
+ case ERROR_NO_TOKEN:
+ return EINVAL;
+ case ERROR_OPEN_FAILED:
+ return EIO;
+ case ERROR_OPEN_FILES:
+ return EAGAIN;
+ case ERROR_OUTOFMEMORY:
+ return ENOMEM;
+ case ERROR_PAGED_SYSTEM_RESOURCES:
+ return EAGAIN;
+ case ERROR_PAGEFILE_QUOTA:
+ return EAGAIN;
+ case ERROR_PATH_NOT_FOUND:
+ return ENOENT;
+ case ERROR_PIPE_BUSY:
+ return EBUSY;
+ case ERROR_PIPE_CONNECTED:
+ return EBUSY;
+#ifdef ECOMM
+ case ERROR_PIPE_LISTENING:
+ return ECOMM;
+ case ERROR_PIPE_NOT_CONNECTED:
+ return ECOMM;
+#endif
+ case ERROR_POSSIBLE_DEADLOCK:
+ return EDEADLOCK;
+ case ERROR_PRIVILEGE_NOT_HELD:
+ return EPERM;
+ case ERROR_PROCESS_ABORTED:
+ return EFAULT;
+ case ERROR_PROC_NOT_FOUND:
+ return ESRCH;
+#ifdef ENONET
+ case ERROR_REM_NOT_LIST:
+ return ENONET;
+#endif
+ case ERROR_SECTOR_NOT_FOUND:
+ return EINVAL;
+ case ERROR_SEEK:
+ return EINVAL;
+ case ERROR_SETMARK_DETECTED:
+ return EIO;
+ case ERROR_SHARING_BUFFER_EXCEEDED:
+ return ENOLCK;
+ case ERROR_SHARING_VIOLATION:
+ return EBUSY;
+ case ERROR_SIGNAL_PENDING:
+ return EBUSY;
+ case ERROR_SIGNAL_REFUSED:
+ return EIO;
+#ifdef ELIBBAD
+ case ERROR_SXS_CANT_GEN_ACTCTX:
+ return ELIBBAD;
+#endif
+ case ERROR_THREAD_1_INACTIVE:
+ return EINVAL;
+ case ERROR_TOO_MANY_LINKS:
+ return EMLINK;
+ case ERROR_TOO_MANY_OPEN_FILES:
+ return EMFILE;
+ case ERROR_WAIT_NO_CHILDREN:
+ return ECHILD;
+ case ERROR_WORKING_SET_QUOTA:
+ return EAGAIN;
+ case ERROR_WRITE_PROTECT:
+ return EROFS;
+ default:
+ return -1;
+ }
+}
+
+static void
+set_errno_from_win32_error(DWORD err)
+{
+ errno = win32_error_to_errno(err);
+}
+
+static void
+set_errno_from_GetLastError(void)
+{
+ set_errno_from_win32_error(GetLastError());
+}
+
/* Replacement for POSIX fsync() */
int
fsync(int fd)
/* Use the Win32 API to get the number of processors. */
unsigned
-win32_get_number_of_processors(void)
+get_available_cpus(void)
{
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
/* Use the Win32 API to get the amount of available memory. */
u64
-win32_get_avail_memory(void)
+get_available_memory(void)
{
MEMORYSTATUSEX status = {
.dwLength = sizeof(status),
};
GlobalMemoryStatusEx(&status);
- return status.ullTotalPhys;
+ return (u64)min(status.ullTotalPhys, status.ullTotalVirtual) * 85 / 100;
}
/* Replacement for POSIX-2008 realpath(). Warning: partial functionality only
return 0;
}
+#define MAX_IO_AMOUNT 1048576
+
static int
do_pread_or_pwrite(int fd, void *buf, size_t count, off_t offset,
bool is_pwrite)
{
HANDLE h;
LARGE_INTEGER orig_offset;
- DWORD bytes_read_or_written;
+ DWORD result = 0xFFFFFFFF;
LARGE_INTEGER relative_offset;
OVERLAPPED overlapped;
BOOL bret;
+ DWORD err = 0;
h = (HANDLE)_get_osfhandle(fd);
if (h == INVALID_HANDLE_VALUE)
- goto err;
+ goto error;
if (GetFileType(h) == FILE_TYPE_PIPE) {
errno = ESPIPE;
- goto err;
+ goto error;
}
/* Get original position */
relative_offset.QuadPart = 0;
- if (!SetFilePointerEx(h, relative_offset, &orig_offset, FILE_CURRENT))
- goto err_set_errno;
+ if (!SetFilePointerEx(h, relative_offset, &orig_offset, FILE_CURRENT)) {
+ err = GetLastError();
+ win32_error(err, L"Failed to get original file position");
+ goto error;
+ }
memset(&overlapped, 0, sizeof(overlapped));
overlapped.Offset = offset;
overlapped.OffsetHigh = offset >> 32;
/* Do the read or write at the specified offset */
+ count = min(count, MAX_IO_AMOUNT);
+ SetLastError(0);
if (is_pwrite)
- bret = WriteFile(h, buf, count, &bytes_read_or_written, &overlapped);
+ bret = WriteFile(h, buf, count, &result, &overlapped);
else
- bret = ReadFile(h, buf, count, &bytes_read_or_written, &overlapped);
- if (!bret)
- goto err_set_errno;
+ bret = ReadFile(h, buf, count, &result, &overlapped);
+ if (!bret) {
+ err = GetLastError();
+ win32_error(err, L"Failed to %s %zu bytes at offset %"PRIu64,
+ (is_pwrite ? "write" : "read"), count, offset);
+ goto error;
+ }
+
+ wimlib_assert(result <= count);
/* Restore the original position */
- if (!SetFilePointerEx(h, orig_offset, NULL, FILE_BEGIN))
- goto err_set_errno;
+ if (!SetFilePointerEx(h, orig_offset, NULL, FILE_BEGIN)) {
+ err = GetLastError();
+ win32_error(err, L"Failed to restore file position to %"PRIu64,
+ offset);
+ goto error;
+ }
- return bytes_read_or_written;
-err_set_errno:
- set_errno_from_GetLastError();
-err:
+ return result;
+
+error:
+ if (err)
+ set_errno_from_win32_error(err);
return -1;
}
* offset, so it is not safe to use with readers/writers on the same file
* descriptor. */
ssize_t
-pread(int fd, void *buf, size_t count, off_t offset)
+win32_pread(int fd, void *buf, size_t count, off_t offset)
{
return do_pread_or_pwrite(fd, buf, count, offset, false);
}
* offset, so it is not safe to use with readers/writers on the same file
* descriptor. */
ssize_t
-pwrite(int fd, const void *buf, size_t count, off_t offset)
+win32_pwrite(int fd, const void *buf, size_t count, off_t offset)
{
return do_pread_or_pwrite(fd, (void*)buf, count, offset, true);
}
+/* Replacement for read() which doesn't hide the Win32 error code */
+ssize_t
+win32_read(int fd, void *buf, size_t count)
+{
+ HANDLE h = (HANDLE)_get_osfhandle(fd);
+ DWORD result = 0xFFFFFFFF;
+
+ if (h == INVALID_HANDLE_VALUE)
+ return -1;
+
+ count = min(count, MAX_IO_AMOUNT);
+ SetLastError(0);
+ if (!ReadFile(h, buf, count, &result, NULL)) {
+ DWORD err = GetLastError();
+ win32_error(err,
+ L"Error reading %zu bytes from fd %d", count, fd);
+ set_errno_from_win32_error(err);
+ return -1;
+ }
+
+ wimlib_assert(result <= count);
+ return result;
+}
+
+/* Replacement for write() which doesn't hide the Win32 error code */
+ssize_t
+win32_write(int fd, const void *buf, size_t count)
+{
+ HANDLE h = (HANDLE)_get_osfhandle(fd);
+ DWORD result = 0xFFFFFFFF;
+
+ if (h == INVALID_HANDLE_VALUE)
+ return -1;
+
+ count = min(count, MAX_IO_AMOUNT);
+ SetLastError(0);
+ if (!WriteFile(h, buf, count, &result, NULL)) {
+ DWORD err = GetLastError();
+ win32_error(err,
+ L"Error writing %zu bytes to fd %d", count, fd);
+ set_errno_from_win32_error(err);
+ return -1;
+ }
+
+ wimlib_assert(result <= count);
+ return result;
+}
+
/* Replacement for glob() in Windows native builds that operates on wide
* characters. */
int
git://wimlib.net / wimlib / blobdiff