dvbscan(1) [debian man page]
dvbscan(1) General Commands Manual dvbscan(1) NAME
dvbscan - a program to produce DVB-T channels.conf files. SYNOPSIS
dvbscan [options]<initialscanfile> DESCRIPTION
This manual page documents briefly the dvbscan commands. dvbscan is a program to produce DVB-T channels.conf files. OPTIONS
-h print this help text -adapter <id> adapter to use (default 0) -frontend <id> frontend to use (default 0) -demux <id> demux to use (default 0) -secfile <filename> Optional sec.conf file -secid <secid> ID of the SEC configuration to use, one of: * UNIVERSAL (default) - Europe, 10800 to 11800 MHz and 11600 to 12700 Mhz, Dual LO, loband 9750, hiband 10600 MHz * DBS - Expressvu, North America, 12200 to 12700 MHz, Single LO, 11250 MHz * STANDARD - 10945 to 11450 Mhz, Single LO, 10000 Mhz * ENHANCED - Astra, 10700 to 11700 MHz, Single LO, 9750 MHz * C-BAND - Big Dish, 3700 to 4200 MHz, Single LO, 5150 Mhz * C-MULTI - Big Dish - Multipoint LNBf, 3700 to 4200 MHz, Dual LO, H:5150MHz, V:5750MHz * One of the sec definitions from the secfile if supplied -satpos <position> Specify DISEQC switch position for DVB-S -inversion <on|off|auto> Specify inversion (default: auto) -uk-ordering Use UK DVB-T channel ordering if present. -timeout <secs> Specify filter timeout to use (standard specced values will be used by default) -filter <filter> Specify service filter, a comma seperated list of the following tokens: If no filter is supplied, all services will be output * tv - Output TV channels * radio - Output radio channels * other - Output other channels * encrypted - Output encrypted channels -out raw <filename>|- Output in raw format to <filename> or stdout -out channels <filename>|- Output in channels.conf format to <filename> or stdout -out vdr12 <filename>|- Output in vdr 1.2.x format to <filename> or stdout -out vdr13 <filename>|- Output in vdr 1.3.x format to <file- name> or stdout This manual page was written by Uwe Bugla <uwe.bugla@gmx.de>. February 14, 2009 dvbscan(1)
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Standard Channels(3) Tcl Library Procedures Standard Channels(3) __________________________________________________________________________________________________________________________________________________ NAME
Tcl_StandardChannels - How the Tcl library deals with the standard channels _________________________________________________________________ DESCRIPTION
This page explains the initialization and use of standard channels in the Tcl library. The term standard channels comes out of the Unix world and refers to the three channels automatically opened by the OS for each new appli- cation. They are stdin, stdout and stderr. The first is the standard input an application can read from, the other two refer to writable channels, one for regular output and the other for error messages. Tcl generalizes this concept in a cross-platform way and exposes standard channels to the script level. APIs The public API procedures dealing directly with standard channels are Tcl_GetStdChannel and Tcl_SetStdChannel. Additional public APIs to consider are Tcl_RegisterChannel, Tcl_CreateChannel and Tcl_GetChannel. INITIALIZATION OF TCL STANDARD CHANNELS
Standard channels are initialized by the Tcl library in three cases: when explicitly requested, when implicitly required before returning channel information, or when implicitly required during registration of a new channel. These cases differ in how they handle unavailable platform- specific standard channels. (A channel is not ``available'' if it could not be successfully opened; for example, in a Tcl application run as a Windows NT service.) 1) A single standard channel is initialized when it is explicitly specified in a call to Tcl_SetStdChannel. The state of the other standard channels are unaffected. Missing platform-specific standard channels do not matter here. This approach is not available at the script level. 2) All uninitialized standard channels are initialized to platform-specific default values: (a) when open channels are listed with Tcl_GetChannelNames (or the file channels script command), or (b) when information about any standard channel is requested with a call to Tcl_GetStdChannel, or with a call to Tcl_GetChannel which specifies one of the standard names (stdin, stdout and stderr). In case of missing platform-specific standard channels, the Tcl standard channels are considered as initialized and then immediately closed. This means that the first three Tcl channels then opened by the application are designated as the Tcl standard channels. 3) All uninitialized standard channels are initialized to platform-specific default values when a user-requested channel is registered with Tcl_RegisterChannel. In case of unavailable platform-specific standard channels the channel whose creation caused the initialization of the Tcl standard channels is made a normal channel. The next three Tcl channels opened by the application are designated as the Tcl standard chan- nels. In other words, of the first four Tcl channels opened by the application the second to fourth are designated as the Tcl stan- dard channels. RE-INITIALIZATION OF TCL STANDARD CHANNELS Once a Tcl standard channel is initialized through one of the methods above, closing this Tcl standard channel will cause the next call to Tcl_CreateChannel to make the new channel the new standard channel, too. If more than one Tcl standard channel was closed Tcl_CreateChannel will fill the empty slots in the order stdin, stdout and stderr. Tcl_CreateChannel will not try to reinitialize an empty slot if that slot was not initialized before. It is this behavior which enables an application to employ method 1 of initialization, i.e. to create and designate their own Tcl standard channels. tclsh The Tcl shell (or rather Tcl_Main) uses method 2 to initialize the standard channels. wish The windowing shell (or rather Tk_MainEx) uses method 1 to initialize the standard channels (See Tk_InitConsoleChannels) on non-Unix plat- forms. On Unix platforms, Tk_MainEx implicitly uses method 2 to initialize the standard channels. SEE ALSO
Tcl_CreateChannel(3), Tcl_RegisterChannel(3), Tcl_GetChannel(3), Tcl_GetStdChannel(3), Tcl_SetStdChannel(3), Tk_InitConsoleChannels(3), tclsh(1), wish(1), Tcl_Main(3), Tk_MainEx(3) KEYWORDS
standard channels Tcl 7.5 Standard Channels(3)