30 lines
555 B
C
30 lines
555 B
C
// RUN: %clang -O2 %s -o %t && %run %t
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// UNSUPPORTED: android, netbsd, darwin, solaris
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//
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#include <sys/types.h>
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#include <errno.h>
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#if !defined(__GLIBC_PREREQ)
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#define __GLIBC_PREREQ(a, b) 0
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#endif
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#if (defined(__linux__) && __GLIBC_PREREQ(2, 25)) || defined(__FreeBSD__)
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#define HAS_GETRANDOM
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#endif
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#if defined(HAS_GETRANDOM)
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#include <sys/random.h>
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#endif
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int main() {
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char buf[16];
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ssize_t n = 1;
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#if defined(HAS_GETRANDOM)
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n = getrandom(buf, sizeof(buf), 0);
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if (n == -1 && errno == ENOSYS)
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n = 1;
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#endif
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return (int)(n <= 0);
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}
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