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Old 05-28-2007
Command line args
My program usage takes the form for example;
$ theApp 2 "one or more words"

i.e. 3 command line arguments; application name, an integer, some text

My code includes the following 4 lines:

int anInteger;
char words[80];

sscanf(argv[1], "%d", &anInteger);
sscanf(argv[2], "%s", &message);

Based on th example execution shown above this code results in th following assignments:

anInterger = 2 /* correct and as I thought*/
message = one /* not as I thought or intended*/

I thought when I printed out the value of message I would get:
one or more words

but instead I get:
one

I have done a test and the use of the " " marks seems to make "one or more words" be seen as a single argument. If I don't use the " " marks it sees every word as another argument.

So even though the program sees "one or more words" as a single argument, sscanf is not reading it properly. How can I overcome this problem?
 
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Qpsmtpd::Command(3pm)					User Contributed Perl Documentation				     Qpsmtpd::Command(3pm)

NAME

       Qpsmtpd::Command - parse arguments to SMTP commands

DESCRIPTION

       Qpsmtpd::Command provides just one public sub routine: parse().

       This sub expects two or three arguments. The first is the name of the SMTP command (such as HELO, MAIL, ...). The second must be the
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       If no third argument is given (or it's not a reference to a CODE) it parses the line according to RFC 1869 (SMTP Service Extensions) for
       the MAIL and RCPT commands and splitting by spaces (" ") for all other.

       Any module can supply it's own parsing routine by returning a sub routine reference from a hook_*_parse. This sub will be called with
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       On successfull parsing it MUST return OK (the constant from Qpsmtpd::Constants) success as first argument and a list of values, which will
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EXAMPLE

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	sub hook_unrecognized_command_parse {
	   my ($self, $transaction, $cmd) = @_;
	   return (OK, &bdat_parser) if ($cmd eq 'bdat');
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	sub bdat_parser {
	   my ($self,$cmd,$line) = @_;
	   # .. do something with $line...
	   return (DENY, "Invalid arguments")
	     if $some_reason_why_there_is_a_syntax_error;
	   return (OK, @args);
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	   ....
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perl v5.14.2							    2009-04-02						     Qpsmtpd::Command(3pm)