fseek, ftell, rewind - reposition a file pointer in a stream
int fseek(stream, offset, ptrname)
The function sets the position of the next input or output operation on
the stream. The new position is at the signed distance offset bytes
from the beginning, the current position, or the end of the file,
according as ptrname has the value SEEK_SET, SEEK_CUR, or SEEK_END.
The function undoes any effects of
The function returns the current value of the offset relative to the
beginning of the file associated with the named stream. It is measured
in bytes and is the only foolproof way to obtain an offset for
The (stream) function is equivalent to (stream , 0L, 0, SEEK_SET),
except that no value is returned.
The function returns -1 for improper seeks, otherwise 0.
See Alsolseek(2), fopen(3s)fseek(3s)