Using O_RDWR vs O_RDONLY | O_WRONLY

O_RDONLY | O_WRONLY (at least on my Linux machine) is not the same thing as O_RDWR.

#define O_RDONLY         00
#define O_WRONLY         01
#define O_RDWR           02

The fact that it works seems like a bug/feature/coincidence rather than “it works because it should work that way”.

Related Posts:

  1. Sleep for milliseconds
  2. Sleep for milliseconds
  3. error: lvalue required as unary & operand
  4. How to print pthread_t
  5. error: lvalue required as unary & operand
  6. Why am I getting “undefined reference to main”
  7. expected identifier before string constant
  8. Implementing a tree in C++
  9. G++ undefined reference to class::function
  10. C++ error: undefined reference to ‘clock_gettime’ and ‘clock_settime’
  11. C++ : Exception occurred in script: basic_string::_S_construct NULL not valid
  12. Is “delete this” allowed in C++?
  13. What is a segmentation fault?
  14. How many spaces for tab character(\t)?
  15. How to create a dynamic array of integers
  16. How to create a dynamic array of integers
  17. Linker Error C++ “undefined reference ” [duplicate]
  18. How do I build a graphical user interface in C++? [closed]
  19. C++ convert from 1 char to string?
  20. How do I build a graphical user interface in C++? [closed]
  21. convert a char* to std::string
  22. system(“pause”); – Why is it wrong?
  23. Pause Console in C++ program
  24. system(“pause”); – Why is it wrong?
  25. Pause Console in C++ program
  26. How to implement 2D vector array?
  27. Why the switch statement cannot be applied on strings?
  28. What is the difference between g++ and gcc?
  29. How to use setprecision in C++
  30. How to dynamically allocate arrays in C++
  31. What does (~0L) mean?
  32. How to dynamically allocate arrays in C++
  33. What is the best way to use a HashMap in C++?
  34. What is the best way to use a HashMap in C++?
  35. What are the differences between a pointer variable and a reference variable in C++?
  36. What is an undefined reference/unresolved external symbol error and how do I fix it?
  37. How to convert string to char array in C++?
  38. How can I convert a std::string to int?
  39. Easiest way to convert int to string in C++
  40. What is the difference between float and double?
  41. Why is “using namespace std;” considered bad practice?
  42. What is the easiest way to initialize a std::vector with hardcoded elements?
  43. outputting ascii table in C++
  44. What is a lambda expression in C++11?
  45. Vector of Vectors to create matrix
  46. How to throw a C++ exception
  47. std::string to char*
  48. How to generate a random number in C++?
  49. pinpointing “conditional jump or move depends on uninitialized value(s)” valgrind message
  50. What is an undefined reference/unresolved external symbol error and how do I fix it?
  51. How do I find the length of an array?
  52. How to convert string to char array in C++?
  53. C++ — expected primary-expression before ‘ ‘
  54. Using getline() with file input in C++
  55. What is the effect of extern “C” in C++?
  56. C++ Cout & Cin & System “Ambiguous” [closed]
  57. ld: symbol(s) not found for architecture x86_64 error
  58. C++ string to double conversion
  59. Why are #ifndef and #define used in C++ header files?
  60. g++ ld: symbol(s) not found for architecture x86_64
  61. What exactly is the difference between “pass by reference” in C and in C++?
  62. How to throw a C++ exception
  63. Conversion from string to char – c++
  64. How to find out if an item is present in a std::vector?
  65. What is meant by Resource Acquisition is Initialization (RAII)?
  66. When to use extern “C” in simple words? [duplicate]
  67. What is `CString`?
  68. Floating point exception( core dump
  69. Initializing an array of objects
  70. Passing Arrays to Function in C++
  71. What does the explicit keyword mean?
  72. How do I print out the contents of a vector?
  73. Difference between != and =! with an example(in C++)
  74. Expression must have class type
  75. The static keyword and its various uses in C++
  76. Passing an array by reference
  77. Unresolved external symbol in object files
  78. Return array in a function
  79. What is the ‘override’ keyword in C++ used for? [duplicate]
  80. C++ equivalent of Java’s toString?
  81. How do sizeof(arr) / sizeof(arr[0]) work?
  82. Unresolved external symbol in object files
  83. Mutex example / tutorial? [closed]
  84. “std::bad_alloc”: am I using too much memory?
  85. Is there any built-in factorial function in c++?
  86. Making my own toString() method on c++ struct
  87. Struct Constructor in C++?
  88. What does “dereferencing” a pointer mean?
  89. What is meant with “const” at end of function declaration? [duplicate]
  90. Regular cast vs. static_cast vs. dynamic_cast
  91. What does int argc, char *argv[] mean?
  92. C++ struct constructor
  93. What is an unsigned char?
  94. What is a smart pointer and when should I use one?
  95. What does “dereferencing” a pointer mean?
  96. Meaning of = delete after function declaration
  97. When to use virtual destructors?
  98. What is a char*?
  99. Using NULL in C++?
  100. std::string to float or double

Leave a Comment

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)