diff options
Diffstat (limited to 'xpa/man/man3/xpaaccess.3')
-rw-r--r-- | xpa/man/man3/xpaaccess.3 | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/xpa/man/man3/xpaaccess.3 b/xpa/man/man3/xpaaccess.3 new file mode 100644 index 0000000..a7e25e8 --- /dev/null +++ b/xpa/man/man3/xpaaccess.3 @@ -0,0 +1,233 @@ +.\" Automatically generated by Pod::Man 2.22 (Pod::Simple 3.13) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. Capital omega is used to do unbreakable dashes and +.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, +.\" nothing in troff, for use with C<>. +.tr \(*W- +.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' +.ie n \{\ +. ds -- \(*W- +. ds PI pi +. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch +. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch +. ds L" "" +. ds R" "" +. ds C` "" +. ds C' "" +'br\} +.el\{\ +. ds -- \|\(em\| +. ds PI \(*p +. ds L" `` +. ds R" '' +'br\} +.\" +.\" Escape single quotes in literal strings from groff's Unicode transform. +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" +.\" If the F register is turned on, we'll generate index entries on stderr for +.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index +.\" entries marked with X<> in POD. Of course, you'll have to process the +.\" output yourself in some meaningful fashion. +.ie \nF \{\ +. de IX +. tm Index:\\$1\t\\n%\t"\\$2" +.. +. nr % 0 +. rr F +.\} +.el \{\ +. de IX +.. +.\} +.\" +.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). +.\" Fear. Run. Save yourself. No user-serviceable parts. +. \" fudge factors for nroff and troff +.if n \{\ +. ds #H 0 +. ds #V .8m +. ds #F .3m +. ds #[ \f1 +. ds #] \fP +.\} +.if t \{\ +. ds #H ((1u-(\\\\n(.fu%2u))*.13m) +. ds #V .6m +. ds #F 0 +. ds #[ \& +. ds #] \& +.\} +. \" simple accents for nroff and troff +.if n \{\ +. ds ' \& +. ds ` \& +. ds ^ \& +. ds , \& +. ds ~ ~ +. ds / +.\} +.if t \{\ +. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" +. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' +. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' +. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' +. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' +. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' +.\} +. \" troff and (daisy-wheel) nroff accents +.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' +.ds 8 \h'\*(#H'\(*b\h'-\*(#H' +.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] +.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' +.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' +.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] +.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] +.ds ae a\h'-(\w'a'u*4/10)'e +.ds Ae A\h'-(\w'A'u*4/10)'E +. \" corrections for vroff +.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' +.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' +. \" for low resolution devices (crt and lpr) +.if \n(.H>23 .if \n(.V>19 \ +\{\ +. ds : e +. ds 8 ss +. ds o a +. ds d- d\h'-1'\(ga +. ds D- D\h'-1'\(hy +. ds th \o'bp' +. ds Th \o'LP' +. ds ae ae +. ds Ae AE +.\} +.rm #[ #] #H #V #F C +.\" ======================================================================== +.\" +.IX Title "xpaaccess 3" +.TH xpaaccess 3 "July 23, 2013" "version 2.1.15" "SAORD Documentation" +.\" For nroff, turn off justification. Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +XPAAccess: return XPA access points matching +template (XPA 2.1 and above) +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <xpa.h> +\& +\& int XPAAccess(XPA xpa, +\& char *template, char *paramlist, char *mode, +\& char **names, char **messages, int n); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The XPAAccess routine returns the public access points that match the +specified second argument template and +have the specified access type. +.PP +A +template +of the form \*(L"class1:name1\*(R" is sent to the +\&\s-1XPA\s0 name server, which returns a list of at most n matching \s-1XPA\s0 +servers. A connection is established with each of these servers and +the paramlist string is passed to the server as the data transfer +request is initiated. If an \s-1XPA\s0 struct is passed to the call, then the +persistent connections are updated as described above. Otherwise, +temporary connections are made to the servers (which will be closed +when the call completes). +.PP +The \fIXPAAccess()\fR routine retrieves names from at most n \s-1XPA\s0 servers +that match the specified template and that were checked for access +using the specified mode. The return string contains both the +class:name and ip:port. If a given server returned an error or the +server callback sends a message back to the client, then the message +will be stored in the associated element of the messages array. +\&\s-1NB:\s0 if specified, the name and messages arrays must be of size n or greater. +.PP +The returned message string will be of the form: +.PP +.Vb 1 +\& XPA$ERROR error\-message (class:name ip:port) +.Ve +.PP +Note that names of matching registered access points are always +returned but may not be valid; it is not sufficient to assume that the +returned number of access points is the number of valid access points. +Rather, it is essential to check the messages array for error +messages. Any string in the messages array is an error message and +indicated that the associated access point is not available. +.PP +For example, assume that a server registers a number of access points +but delays entering its event loop. If a call to \fIXPAAccess()\fR is made +before the event loop is entered, the call will timeout (after waiting +for the long timeout period) and return an error of the form: +.PP +.Vb 1 +\& XPA$ERROR: timeout waiting for server authentication (XPA:xpa1) +.Ve +.PP +The error means that the \s-1XPA\s0 access point has been registered but is +not yet available (because events are not being processed). When the +server finally enters its event loop, subsequent calls to \fIXPAAccess()\fR +will return successfully. +.PP +\&\s-1NB:\s0 This routine only works with \s-1XPA\s0 servers built with \s-1XPA\s0 2.1.x and later. +Servers with older versions of \s-1XPA\s0 will return the error message: +.PP +.Vb 1 +\& XPA$ERROR invalid xpa command in initialization string +.Ve +.PP +If you get this error message, then the old server actually is ready +for access, since it got to the point of fielding the query! The +xpaaccess program, for example, ignores this message in order to work +properly with older servers. +.PP +The third argument for \fIXPAAccess()\fR is the type of access and can be +any combination of: +.PP +.Vb 5 +\& type explanation +\& \-\-\-\-\-\- \-\-\-\-\-\-\-\-\-\-\- +\& g xpaget calls can be made on this access point +\& s xpaset calls can be made on this access point +\& i xpainfo calls can be made on this access point +.Ve +.PP +The mode string argument is of the form: \*(L"key1=value1,key2=value2,...\*(R" +The following keywords are recognized: +.PP +.Vb 3 +\& key value default explanation +\& \-\-\-\-\-\- \-\-\-\-\-\-\-\- \-\-\-\-\-\-\-\- \-\-\-\-\-\-\-\-\-\-\- +\& ack true/false true if false, don\*(Aqt wait for ack from server (after callback completes) +.Ve +.PP +The ack keyword is not very useful, since the server completes the callback +in order to return the data anyway. It is here for completion (and perhaps +for future usefulness). +.SH "SEE ALSO" +.IX Header "SEE ALSO" +See xpa(n) for a list of \s-1XPA\s0 help pages |