98 lines
3.8 KiB
C
98 lines
3.8 KiB
C
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// Adapted from dosmap.c in Visual Studio 12.0 CRT sources.
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//
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// The _dosmaperr function is required by the MySQL lib we use,
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// but no longer exists in the VS 14.0+ crt.
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <stdlib.h>
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static struct errentry
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{
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DWORD oscode; // OS return value
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int errnocode; // System V error code
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} errtable[] =
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{
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{ ERROR_INVALID_FUNCTION, EINVAL }, /* 1 */
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{ ERROR_FILE_NOT_FOUND, ENOENT }, /* 2 */
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{ ERROR_PATH_NOT_FOUND, ENOENT }, /* 3 */
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{ ERROR_TOO_MANY_OPEN_FILES, EMFILE }, /* 4 */
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{ ERROR_ACCESS_DENIED, EACCES }, /* 5 */
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{ ERROR_INVALID_HANDLE, EBADF }, /* 6 */
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{ ERROR_ARENA_TRASHED, ENOMEM }, /* 7 */
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{ ERROR_NOT_ENOUGH_MEMORY, ENOMEM }, /* 8 */
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{ ERROR_INVALID_BLOCK, ENOMEM }, /* 9 */
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{ ERROR_BAD_ENVIRONMENT, E2BIG }, /* 10 */
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{ ERROR_BAD_FORMAT, ENOEXEC }, /* 11 */
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{ ERROR_INVALID_ACCESS, EINVAL }, /* 12 */
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{ ERROR_INVALID_DATA, EINVAL }, /* 13 */
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{ ERROR_INVALID_DRIVE, ENOENT }, /* 15 */
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{ ERROR_CURRENT_DIRECTORY, EACCES }, /* 16 */
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{ ERROR_NOT_SAME_DEVICE, EXDEV }, /* 17 */
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{ ERROR_NO_MORE_FILES, ENOENT }, /* 18 */
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{ ERROR_LOCK_VIOLATION, EACCES }, /* 33 */
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{ ERROR_BAD_NETPATH, ENOENT }, /* 53 */
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{ ERROR_NETWORK_ACCESS_DENIED, EACCES }, /* 65 */
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{ ERROR_BAD_NET_NAME, ENOENT }, /* 67 */
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{ ERROR_FILE_EXISTS, EEXIST }, /* 80 */
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{ ERROR_CANNOT_MAKE, EACCES }, /* 82 */
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{ ERROR_FAIL_I24, EACCES }, /* 83 */
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{ ERROR_INVALID_PARAMETER, EINVAL }, /* 87 */
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{ ERROR_NO_PROC_SLOTS, EAGAIN }, /* 89 */
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{ ERROR_DRIVE_LOCKED, EACCES }, /* 108 */
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{ ERROR_BROKEN_PIPE, EPIPE }, /* 109 */
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{ ERROR_DISK_FULL, ENOSPC }, /* 112 */
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{ ERROR_INVALID_TARGET_HANDLE, EBADF }, /* 114 */
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{ ERROR_INVALID_HANDLE, EINVAL }, /* 124 */
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{ ERROR_WAIT_NO_CHILDREN, ECHILD }, /* 128 */
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{ ERROR_CHILD_NOT_COMPLETE, ECHILD }, /* 129 */
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{ ERROR_DIRECT_ACCESS_HANDLE, EBADF }, /* 130 */
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{ ERROR_NEGATIVE_SEEK, EINVAL }, /* 131 */
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{ ERROR_SEEK_ON_DEVICE, EACCES }, /* 132 */
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{ ERROR_DIR_NOT_EMPTY, ENOTEMPTY }, /* 145 */
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{ ERROR_NOT_LOCKED, EACCES }, /* 158 */
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{ ERROR_BAD_PATHNAME, ENOENT }, /* 161 */
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{ ERROR_MAX_THRDS_REACHED, EAGAIN }, /* 164 */
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{ ERROR_LOCK_FAILED, EACCES }, /* 167 */
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{ ERROR_ALREADY_EXISTS, EEXIST }, /* 183 */
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{ ERROR_FILENAME_EXCED_RANGE, ENOENT }, /* 206 */
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{ ERROR_NESTING_NOT_ALLOWED, EAGAIN }, /* 215 */
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{ ERROR_NOT_ENOUGH_QUOTA, ENOMEM } /* 1816 */
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};
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// The following two constants must be the minimum and maximum
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// values in the (contiguous) range of Exec Failure errors.
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#define MIN_EXEC_ERROR ERROR_INVALID_STARTING_CODESEG
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#define MAX_EXEC_ERROR ERROR_INFLOOP_IN_RELOC_CHAIN
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// These are the low and high value in the range of errors that are
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// access violations
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#define MIN_EACCES_RANGE ERROR_WRITE_PROTECT
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#define MAX_EACCES_RANGE ERROR_SHARING_BUFFER_EXCEEDED
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void _dosmaperr(DWORD oserrno)
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{
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_doserrno = oserrno;
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// Check the table for the OS error code
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for (size_t i = 0; i < _countof(errtable); ++i)
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{
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if (oserrno == errtable[i].oscode)
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{
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errno = errtable[i].errnocode;
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}
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}
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// The error code wasn't in the table. We check for a range of
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// EACCES errors or exec failure errors (ENOEXEC). Otherwise
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// EINVAL is returned.
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if (oserrno >= MIN_EACCES_RANGE && oserrno <= MAX_EACCES_RANGE)
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errno = EACCES;
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else if (oserrno >= MIN_EXEC_ERROR && oserrno <= MAX_EXEC_ERROR)
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errno = ENOEXEC;
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else
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errno = EINVAL;
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}
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