47 lines
861 B
C
47 lines
861 B
C
/* Linux version of pread so we can have a weak_alias */
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#include <_ansi.h>
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#include <unistd.h>
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#include <reent.h>
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#include <machine/weakalias.h>
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ssize_t
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_DEFUN (_pread_r, (rptr, fd, buf, n, off),
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struct _reent *rptr,
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int fd,
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void *buf,
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size_t n,
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off_t off)
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{
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off_t cur_pos;
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_READ_WRITE_RETURN_TYPE num_read;
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if ((cur_pos = _lseek_r (rptr, fd, 0, SEEK_CUR)) == (off_t)-1)
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return -1;
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if (_lseek_r (rptr, fd, off, SEEK_SET) == (off_t)-1)
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return -1;
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num_read = _read_r (rptr, fd, buf, n);
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if (_lseek_r (rptr, fd, cur_pos, SEEK_SET) == (off_t)-1)
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return -1;
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return (ssize_t)num_read;
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}
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#ifndef _REENT_ONLY
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ssize_t
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_DEFUN (__libc_pread, (fd, buf, n, off),
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int fd,
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void *buf,
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size_t n,
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off_t off)
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{
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return _pread_r (_REENT, fd, buf, n, off);
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}
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weak_alias(__libc_pread,pread)
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#endif
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