|
| 1 | +#ifndef TEST_VERSION |
| 2 | + |
| 3 | +#undef rename |
| 4 | +#undef unlink |
| 5 | + |
| 6 | +int pgrename(const char *from, const char *to) |
| 7 | +{ |
| 8 | + int loops = 0; |
| 9 | + |
| 10 | + while (!MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING)) |
| 11 | + { |
| 12 | + if (GetLastError() != ERROR_ACCESS_DENIED) |
| 13 | + /* set errno? */ |
| 14 | + return -1; |
| 15 | + Sleep(100); /* ms */ |
| 16 | + if (loops == 10) |
| 17 | +#ifndef FRONTEND |
| 18 | + elog(LOG, "Unable to rename %s to %s, continuing to try", from, to); |
| 19 | +#else |
| 20 | + fprintf(stderr, "Unable to rename %s to %s, continuing to try\n", from, to); |
| 21 | +#endif |
| 22 | + loops++; |
| 23 | + } |
| 24 | + |
| 25 | + if (loops > 10) |
| 26 | +#ifndef FRONTEND |
| 27 | + elog(LOG, "Completed rename of %s to %s", from, to); |
| 28 | +#else |
| 29 | + fprintf(stderr, "Completed rename of %s to %s\n", from, to); |
| 30 | +#endif |
| 31 | + return 0; |
| 32 | +} |
| 33 | + |
| 34 | + |
| 35 | +int pgunlink(const char *path) |
| 36 | +{ |
| 37 | + int loops = 0; |
| 38 | + |
| 39 | + while (unlink(path)) |
| 40 | + { |
| 41 | + if (errno != EACCES) |
| 42 | + /* set errno? */ |
| 43 | + return -1; |
| 44 | + Sleep(100); /* ms */ |
| 45 | + if (loops == 10) |
| 46 | +#ifndef FRONTEND |
| 47 | + elog(LOG, "Unable to unlink %s, continuing to try", path); |
| 48 | +#else |
| 49 | + fprintf(stderr, "Unable to unlink %s, continuing to try\n", path); |
| 50 | +#endif |
| 51 | + loops++; |
| 52 | + } |
| 53 | + |
| 54 | + if (loops > 10) |
| 55 | +#ifndef FRONTEND |
| 56 | + elog(LOG, "Completed unlink of %s", path); |
| 57 | +#else |
| 58 | + fprintf(stderr, "Completed unlink of %s\n", path); |
| 59 | +#endif |
| 60 | + return 0; |
| 61 | +} |
| 62 | + |
| 63 | + |
| 64 | +#else |
| 65 | + |
| 66 | + |
| 67 | +/* |
| 68 | + * Illustrates problem with Win32 rename() and unlink() |
| 69 | + * under concurrent access. |
| 70 | + * |
| 71 | + * Run with arg '1', then less than 5 seconds later, run with |
| 72 | + * arg '2' (rename) or '3'(unlink) to see the problem. |
| 73 | + */ |
| 74 | + |
| 75 | +#include <stdio.h> |
| 76 | +#include <stdlib.h> |
| 77 | +#include <errno.h> |
| 78 | +#include <windows.h> |
| 79 | + |
| 80 | +#define halt(str) \ |
| 81 | +do { \ |
| 82 | + fputs(str, stderr); \ |
| 83 | + exit(1); \ |
| 84 | +} while (0) |
| 85 | + |
| 86 | +int |
| 87 | +main(int argc, char* argv[]) |
| 88 | +{ |
| 89 | + FILE *fd; |
| 90 | + |
| 91 | + if (argc != 2) |
| 92 | + halt("Arg must be '1' (test), '2' (rename), or '3' (unlink)\n" |
| 93 | + "Run '1' first, then less than 5 seconds later, run\n" |
| 94 | + "'2' to test rename, or '3' to test unlink.\n"); |
| 95 | + |
| 96 | + if (atoi(argv[1]) == 1) |
| 97 | + { |
| 98 | + if ((fd = fopen("/rtest.txt", "w")) == NULL) |
| 99 | + halt("Can not create file\n"); |
| 100 | + fclose(fd); |
| 101 | + if ((fd = fopen("/rtest.txt", "r")) == NULL) |
| 102 | + halt("Can not open file\n"); |
| 103 | + Sleep(5000); |
| 104 | + } |
| 105 | + else if (atoi(argv[1]) == 2) |
| 106 | + { |
| 107 | + unlink("/rtest.new"); |
| 108 | + if ((fd = fopen("/rtest.new", "w")) == NULL) |
| 109 | + halt("Can not create file\n"); |
| 110 | + fclose(fd); |
| 111 | + while (!MoveFileEx("/rtest.new", "/rtest.txt", MOVEFILE_REPLACE_EXISTING)) |
| 112 | + { |
| 113 | + if (GetLastError() != ERROR_ACCESS_DENIED) |
| 114 | + halt("Unknown failure\n"); |
| 115 | + else |
| 116 | + fprintf(stderr, "move failed\n"); |
| 117 | + Sleep(500); |
| 118 | + } |
| 119 | + halt("move successful\n"); |
| 120 | + } |
| 121 | + else if (atoi(argv[1]) == 3) |
| 122 | + { |
| 123 | + while (unlink("/rtest.txt")) |
| 124 | + { |
| 125 | + if (errno != EACCES) |
| 126 | + halt("Unknown failure\n"); |
| 127 | + else |
| 128 | + fprintf(stderr, "unlink failed\n"); |
| 129 | + Sleep(500); |
| 130 | + } |
| 131 | + halt("unlink successful\n"); |
| 132 | + } |
| 133 | + else |
| 134 | + halt("invalid arg\n"); |
| 135 | + |
| 136 | + return 0; |
| 137 | +} |
| 138 | +#endif |
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