os::seek_to_file_offset(int fd, jlong offset)
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//Linux版(jdk7/hotspot/src/os/linux/vm/os_linux.cpp) // move file pointer to the specified offset jlong os::seek_to_file_offset(int fd, jlong offset) { return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); }