| 61 | } |
| 62 | |
| 63 | int libc_fseek(void) |
| 64 | { |
| 65 | const char *tmpdir; |
| 66 | char *fname; |
| 67 | int fd; |
| 68 | FILE *fp; |
| 69 | const char outstr[] = "hello world!\n"; |
| 70 | char strbuf[sizeof outstr]; |
| 71 | char buf[200]; |
| 72 | struct stat st1; |
| 73 | struct stat st2; |
| 74 | int result = 0; |
| 75 | |
| 76 | tmpdir = getenv("TMPDIR"); |
| 77 | if (tmpdir == NULL || tmpdir[0] == '\0') |
| 78 | tmpdir = "/tmp"; |
| 79 | |
| 80 | asprintf(&fname, "%s/tst-fseek.XXXXXX", tmpdir); |
| 81 | if (fname == NULL) |
| 82 | { |
| 83 | fprintf(stderr, "cannot generate name for temporary file: %s\n", |
| 84 | strerror(errno)); |
| 85 | return 1; |
| 86 | } |
| 87 | |
| 88 | /* Create a temporary file. */ |
| 89 | fd = mkstemp(fname); |
| 90 | if (fd == -1) |
| 91 | { |
| 92 | fprintf(stderr, "cannot open temporary file: %s\n", strerror(errno)); |
| 93 | return 1; |
| 94 | } |
| 95 | |
| 96 | fp = fdopen(fd, "w+"); |
| 97 | if (fp == NULL) |
| 98 | { |
| 99 | fprintf(stderr, "cannot get FILE for temporary file: %s\n", strerror( |
| 100 | errno)); |
| 101 | return 1; |
| 102 | } |
| 103 | setbuffer(fp, strbuf, sizeof(outstr) - 1); |
| 104 | |
| 105 | if (fwrite(outstr, sizeof(outstr) - 1, 1, fp) != 1) |
| 106 | { |
| 107 | printf("%d: write error\n", __LINE__); |
| 108 | result = 1; |
| 109 | goto out; |
| 110 | } |
| 111 | |
| 112 | /* The EOF flag must be reset. */ |
| 113 | if (fgetc(fp) != EOF) |
| 114 | { |
| 115 | printf("%d: managed to read at end of file\n", __LINE__); |
| 116 | result = 1; |
| 117 | } |
| 118 | else if (!feof(fp)) |
| 119 | { |
| 120 | printf("%d: EOF flag not set\n", __LINE__); |