| // RUN: %clangxx -g %s -o %t && %run %t | FileCheck %s |
| // CHECK: 1 |
| // CHECK-NEXT: 2 |
| |
| #include <assert.h> |
| #include <stdio.h> |
| |
| int main(void) { |
| // use a tool that produces different output than input to verify |
| // that everything worked correctly |
| FILE *fp = popen("sort", "w"); |
| assert(fp); |
| |
| // verify that fileno() returns a meaningful descriptor (needed |
| // for the implementation of TSan) |
| assert(fileno(fp) != -1); |
| |
| assert(fputs("2\n", fp) >= 0); |
| assert(fputs("1\n", fp) >= 0); |
| assert(pclose(fp) == 0); |
| |
| return 0; |
| } |
