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54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
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/* Reentrant version of getentropy system call. */
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#include <reent.h>
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#include <unistd.h>
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#include <_syslist.h>
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/* Some targets provides their own versions of these functions. Those
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targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
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#ifdef _REENT_ONLY
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#define REENTRANT_SYSCALLS_PROVIDED
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#endif
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#endif
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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/* We use the errno variable used by the system dependent layer. */
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#undef errno
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extern int errno;
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/*
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FUNCTION
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<<_getentropy_r>>---Reentrant version of getentropy
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INDEX
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_getentropy_r
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SYNOPSIS
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#include <reent.h>
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int _getentropy_r(struct _reent *<[ptr]>,
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void *<[buf]>, size_t <[buflen]>);
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DESCRIPTION
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This is a reentrant version of <<getentropy>>. It
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takes a pointer to the global data block, which holds
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<<errno>>.
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*/
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int
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_getentropy_r (struct _reent *ptr,
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void *buf,
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size_t buflen)
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{
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int ret;
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errno = 0;
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if ((ret = _getentropy (buf, buflen)) == -1 && errno != 0)
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_REENT_ERRNO(ptr) = errno;
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return ret;
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}
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#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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