24 lines
536 B
C++
24 lines
536 B
C++
// 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;
|
|
}
|