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