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  1. /* Chapter 1. Basic cp file copy program. Win32 Implementation. */
  2. /* cpW file1 file2: Copy file1 to file2. */
  3.  
  4. #include <windows.h>
  5. #include <stdio.h>
  6. #include <assert.h>
  7. #define BUF_SIZE 16384  /* Optimal in several experiments. Small values such as 256 give very bad performance */
  8.  
  9. int main(int argc, LPTSTR argv[])
  10. {
  11. 	HANDLE hIn, hOut;
  12. 	DWORD nIn, nOut;
  13. 	CHAR buffer[BUF_SIZE] = {0};
  14. 	if (argc != 3) {
  15. 		fprintf(stderr, "Usage: cp file1 file2\n");
  16. 		return 1;
  17. 	}
  18. 	hOut = CreateFile(argv[2], GENERIC_WRITE, 0, NULL,
  19. 		CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
  20. 	if (hOut == INVALID_HANDLE_VALUE) {
  21. 		fprintf(stderr, "Cannot open output file. Error: %x\n", GetLastError());
  22. 		return -1;
  23. 	}
  24. 	WriteFile(hOut, buffer, 1, &nOut, NULL);
  25. 	assert(nOut == 1);
  26. 	CloseHandle(hOut);
  27. 	hIn = CreateFile(argv[1], GENERIC_READ, FILE_SHARE_READ, NULL,
  28. 		OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  29. 	if (hIn == INVALID_HANDLE_VALUE) {
  30. 		fprintf(stderr, "Cannot open input file. Error: %x\n", GetLastError());
  31. 		return 2;
  32. 	}
  33.  
  34. 	hOut = CreateFile(argv[2], GENERIC_WRITE, 0, NULL,
  35. 		CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
  36. 	if (hOut == INVALID_HANDLE_VALUE) {
  37. 		fprintf(stderr, "Cannot open output file. Error: %x\n", GetLastError());
  38. 		CloseHandle(hIn);
  39. 		return 3;
  40. 	}
  41. 	while (ReadFile(hIn, buffer, BUF_SIZE, &nIn, NULL) && nIn > 0) {
  42. 		WriteFile(hOut, buffer, nIn, &nOut, NULL);
  43. 		if (nIn != nOut) {
  44. 			fprintf(stderr, "Fatal write error: %x\n", GetLastError());
  45. 			CloseHandle(hIn); CloseHandle(hOut);
  46. 			return 4;
  47. 		}
  48. 	}
  49. 	CloseHandle(hIn);
  50. 	CloseHandle(hOut);
  51. 	return 0;
  52. }
  53.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.c:4:10: fatal error: windows.h: No such file or directory
 #include <windows.h>
          ^~~~~~~~~~~
compilation terminated.
stdout 
Standard output is empty
https://ideone.com/7muAkc
language:
C (gcc 8.3)
created:
265 days ago
visibility:
secret

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