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24 lines
727 B
C
24 lines
727 B
C
/** We have to replace glibc getrandom only when glibc version is higher than 2.25.
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* In previous versions of glibc this function doesn't exist
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* and old kernels may be missing SYS_getrandom syscall.
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*/
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#include <features.h>
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#if defined(__GLIBC__) && __GLIBC__ >= 2
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# define GLIBC_MINOR __GLIBC_MINOR__
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#elif defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ >= 2
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# define GLIBC_MINOR __GNU_LIBRARY_MINOR__
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#endif
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#if defined(GLIBC_MINOR) && GLIBC_MINOR >= 25
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#include <unistd.h>
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#include <syscall.h>
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#include "syscall.h"
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ssize_t getrandom(void *buf, size_t buflen, unsigned flags)
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{
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/// There was cancellable syscall (syscall_cp), but I don't care too.
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return syscall(SYS_getrandom, buf, buflen, flags);
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}
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#endif
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