| 1 | // RUN: %clangxx -g %s -o %t && %run %t |
|---|---|
| 2 | |
| 3 | // Newer versions of Android have FDSan, and will fail this test as FDSan will |
| 4 | // catch the error instead. |
| 5 | // UNSUPPORTED: android |
| 6 | |
| 7 | #include <assert.h> |
| 8 | #include <stdio.h> |
| 9 | #include <unistd.h> |
| 10 | |
| 11 | int main(int argc, char **argv) { |
| 12 | FILE *fp = fopen(filename: argv[0], modes: "r"); |
| 13 | assert(fp); |
| 14 | |
| 15 | // file should be good upon opening |
| 16 | assert(!feof(fp) && !ferror(fp)); |
| 17 | |
| 18 | // read until EOF |
| 19 | char buf[BUFSIZ]; |
| 20 | while (fread(ptr: buf, size: 1, n: sizeof buf, stream: fp) != 0) {} |
| 21 | assert(feof(fp)); |
| 22 | |
| 23 | // clear EOF |
| 24 | clearerr(stream: fp); |
| 25 | assert(!feof(fp) && !ferror(fp)); |
| 26 | |
| 27 | // get file descriptor |
| 28 | int fd = fileno(stream: fp); |
| 29 | assert(fd != -1); |
| 30 | |
| 31 | // break the file by closing underlying descriptor |
| 32 | assert(close(fd) != -1); |
| 33 | |
| 34 | // verify that an error is signalled |
| 35 | assert(fread(buf, 1, sizeof buf, fp) == 0); |
| 36 | assert(ferror(fp)); |
| 37 | |
| 38 | // clear error |
| 39 | clearerr(stream: fp); |
| 40 | assert(!feof(fp) && !ferror(fp)); |
| 41 | |
| 42 | // fclose() will return EBADF because of closed fd |
| 43 | assert(fclose(fp) == -1); |
| 44 | return 0; |
| 45 | } |
| 46 |