File: popen.cpp

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (23 lines) | stat: -rw-r--r-- 536 bytes parent folder | download | duplicates (30) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
// 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;
}