NAME<\/a> fblocked \u2212 Test whether the last input operation exhausted all available input<\/p>\n fblocked<\/b> channelId<\/i><\/p>\n The fblocked<\/b> command returns 1 if the most recent input operation on channelId<\/i> returned less information than requested because all available input was exhausted. For example, if gets<\/b> is invoked when there are only three characters available for input and no end-of-line sequence, gets<\/b> returns an empty string and a subsequent call to fblocked<\/b> will return 1.<\/p>\n ChannelId<\/i> must be an identifier for an open channel such as a Tcl standard channel (stdin<\/b>, stdout<\/b>, or stderr<\/b>), the return value from an invocation of open<\/b> or socket<\/b>, or the result of a channel creation command provided by a Tcl extension.<\/p>\n The fblocked<\/b> command is particularly useful when writing network servers, as it allows you to write your code in a line-by-line style without preventing the servicing of other connections. This can be seen in this simple echo-service:<\/p>\n # This is called whenever a new client connects to the server proc connect {chan host port} { # This is called whenever either at least one byte of input # data is available, or the channel was closed by the client. proc echoLine {chan clientName} { # Create the server socket and enter the event-loop to wait # for incoming connections… socket -server connect 12345 vwait forever<\/p>\n gets(n), open(n), read(n), socket(n), Tcl_StandardChannels(3)<\/p>\n blocking, nonblocking<\/p>\n fblocked \u2212 Test whether the last input operation exhausted all available input <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3783,1],"tags":[2724,2635],"class_list":["post-6052","post","type-post","status-publish","format-standard","hentry","category-n-comandos-tcl-tk","category-sin-categoria","tag-fblocked","tag-mann"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6052","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=6052"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/6052\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=6052"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=6052"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=6052"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
SYNOPSIS<\/a>
DESCRIPTION<\/a>
EXAMPLE<\/a>
SEE ALSO<\/a>
KEYWORDS<\/a> <\/p>\n
\nNAME <\/a> <\/h2>\n
SYNOPSIS <\/a> <\/h2>\n
DESCRIPTION <\/a> <\/h2>\n
EXAMPLE <\/a> <\/h2>\n
set clientName [format <%s:%d> $host $port]
puts “connection from $clientName”
fconfigure $chan -blocking 0 -buffering line
fileevent $chan readable [list echoLine $chan $clientName] }<\/p>\n
gets $chan line
if {[eof $chan]} {
puts “finishing connection from $clientName”
close $chan
} elseif {![fblocked<\/b> $chan]} {
# Didn\u2019t block waiting for end-of-line
puts “$clientName – $line”
puts $chan $line
} }<\/p>\nSEE ALSO <\/a> <\/h2>\n
KEYWORDS <\/a> <\/h2>\n
\n","protected":false},"excerpt":{"rendered":"