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snsplit,v0.3.8(8)					     snsplit,v0.3.8(8)

NAME
       snsplit - split an article stream into individual articles

SYNOPSIS
       snsplit [-r] [field... -] prog...

DESCRIPTION
       snsplit	reads  an  article stream from descriptor 0 and splits it into
       separate articles, invoking prog...  on each, with the article avaiable
       on  descriptor 0.  This is useful as a quick-and-dirty way of filtering
       an article stream.

       The incoming article stream is expected to  be  in  wire	 format,  with
       lines ending in CRLF, leading dots doubled, and delimited by a dot on a
       line by itself.

       The article presented to prog...	 will have lines that end  in  a  bare
       newline,	 will  have  all  header  lines unfolded, leading dots will be
       unstuffed, and the article will be terminated by end-of-file.

ARGUMENTS
       prog...
	      is the program (with arguments) to  run  on  each	 article.   If
	      prog...  exits with any kind of failure, snsplit aborts.

       field...-
	      are  optional  header  field names.  If these are specified, the
	      value of the first header field of that name  will  be  exported
	      into the environment.  This field...  list must be terminated by
	      the hyphen.  See also ENVIRONMENT below.

OPTIONS
       -r     Expect input articles in rnews batch format instead.

ENVIRONMENT
       snsplit sets some environment variables.	 If  the  environment  already
       contains these variables, they will be overwritten.

       SEQUENCE
	      If  already  set	to a positive value, it is incremented for the
	      first article.  If it isn't set, is set to  one  for  the	 first
	      article.	Thereafter it is incremented for each subsequent arti‐
	      cle.  The value is always a 6-digit number with leading  zeroes,
	      and it can roll over.

       BYTES  contains the size of the current article.

       HEAD_LINES
	      The  number  of  lines in the head of the article, excluding the
	      blank separator line.

       BODY_LINES
	      The number of lines in the body of the  article,	excluding  the
	      blank separator line.

       FLD_FIELD
	      If  any fields are specified on the command line, where field is
	      the name of an article header field, then FLD_FIELD will be  set
	      to the value of field, where FIELD is the same as field but with
	      lower case characters changed to upper  case,  and  all  hyphens
	      changed  to  underscores.	  Confusing?   If field is message-id,
	      then FLD_MESSAGE_ID will be set to the value of the  first  Mes‐
	      sage-ID field in the current article, if there is one.

EXIT CODES
       snsplit	exits 0 on success, 1 on usage error, 2 on system error, and 3
       on article format error.	 If prog...  exits with other than 0,  snsplit
       will also exit that value.

N.B.				  Harold Tay		     snsplit,v0.3.8(8)

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