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The output list contains entries like the following:
1 Ucase (Upper to lower case converter)
The first field is a sequence number. The second field is the function's name (by which it may be accessed), and the third field is the function's explanation string.
The alpq command works by pushing the alp STREAMS module, querying it via ioctl(2), and then popping it immediately; its standard input (normally the user's tty) must therefore be a stream.