NAME¶

printcap - 印表機相容性資料庫

總覽 SYNOPSIS¶

printcap

描述 DESCRIPTION¶

Printcap 是 termcap(5) 的簡單版, 用來描述 line printers. 當用到 spool 系 統時, 一定會去參考 printcap 這個檔. 允許動態地加入及刪除印表機. 在這資料 庫中的每一段敘述代表一臺印表機. This data base may not be substituted for, as is possible for termcap, because it may allow accounting to be bypassed.

預設的印表機是 lp, 雖然環境變數 PRINTER 可能優於(override)此. 每一 個用到 spool 的軟體都支援 -p 的選項, 用以選擇印表機. 如果想知道如何為一 臺印表機設定資料的討論, 請參照 4.3 BSD Line Printer Spooler Manual.

相容性 CAPABILITIES¶

根據 termcap(5) 對檔案輸出的描述.

     Name       Type      Description


     af         str       NULL                   name of accounting file


     br         num       none                   if lp is a tty, set the baud


                                                 rate (ioctl(2) call)


     cf         str       NULL                   cifplot data filter


     df         str       NULL                   tex data filter (DVI format)


     fc         num       0                      if lp is a tty, clear flag 


                                                 bits (sgtty.h)


     ff         str       `                   string to send for a form


                                                 feed


     fo         bool      false                  print a form feed when 


                                                 device is opened


     fs         num       0                      like `fc' but set bits


     gf         str       NULL                   graph data filter (plot(3) 


                                                 format)


     hl         bool      false                  print the burst header page


                                                 last


     ic         bool      false                  driver supports(non standard)


                                                 ioctl to indent printout


     if         str       NULL                   name of text filter which 


                                                 does accounting


     lf         str       /dev/console           error logging file name


     lo         str       lock                   name of lock file


     lp         str       /dev/lp                device name to open for 


                                                 output


     mx         num       1000                   maximum file size (in BUFSIZ


                                                 blocks), zero = unlimited


     nd         str       NULL                   next directory for list of


                                                 queues (unimplemented)


     nf         str       NULL                   ditroff data filter (device


                                                 independent troff)


     of         str       NULL                   name of output filtering


                                                 program


     pc         num       200                    price per foot or page in


                                                 hundredths of cents


     pl         num       66                     page length (in lines)


     pw         num       132                    page width (in characters)


     px         num       0                      page width in pixels


                                                 (horizontal)


     py         num       0                      page length in pixels 


                                                 (vertical)


     rf         str       NULL                   filter for printing FORTRAN


                                                 style text files


     rg         str       NULL                   restricted group. Only


                                              members of group allowed access


     rm         str       NULL                   machine name for remote


                                                 printer


     rp         str       ``lp''                 remote printer name argument


     rs         bool      false                  restrict remote users to


                                                 those with local accounts


     rw         bool      false                  open the printer device for


                                                 reading and writing


     sb         bool      false                  short banner (one line only)


     sc         bool      false                  suppress multiple copies


     sd         str       /var/spool/lpd         spool directory


     sf         bool      false                  suppress form feeds


     sh         bool      false                  suppress printing of burst


                                                 page header


     st         str       status                 status file name


     tf         str       NULL                   troff data filter (cat


                                                 phototypesetter)


     tr         str       NULL                   trailer string to print when


                                                 queue empties


     vf         str       NULL                   raster image filter

如果本地端印表機(local line printer) driver 支援 indentation 的話, daemon 將 知道如何去用它.

過濾器 FILTERS¶

lpd(8) 守護程序將創造出一個過濾的管線 (pipeline of filters) 來處理各個不同印 表機的檔案. 過濾器將依照旗標來選擇將何者送到 lpr(1) . 管線的設定值有:

           p            pr | if regular text + pr(1)


           none         If         regular text


           c            cf         cifplot


           d            df         DVI (tex)


           g            gf         plot(3)


           n            nf         ditroff


           f            rf         Fortran


           t            tf         troff


           v            vf         raster image

if 過濾器的用法是:

           if [-c] -wwidth -llength -iindent -n login -h host acct-file

-c 這個旗標只有在 -l 旗標有列在 lpr 中時才可忽略. width 和 length 定義 了 page 的長和寬 (from pw and pl respectively). -n 和 -h 可指定列印工作擁有者 的 login name 和 host name. Acct-file 將忽略 printcap 中的描述.

If no if is specified, of is used instead, with the distinction that of is opened only once, while if is opened for every individual job. Thus, if is better suited to performing accounting. The of is only given the width and length flags.

其它過濾器的呼叫用法如下:

           filter -xwidth -ylength -n login -h host acct-file

如果要用 pixels 為單位來定長寬的話, 用 px 和 py 這二個變數. 所有的過濾器都經由 stdin 輸入檔案, stdout 輸出到印表機, 用 stderr 或 syslog(3) 來記錄(log), 而且不會忽略 SIGINT.

日誌 LOGGING¶

Error messages generated by the line printer programs themselves (that is, the lp* programs) are logged by syslog(3) using the LPR facility. Messages printed on stderr of one of the filters are sent to the corre- sponding lf file. The filters may, of course, use syslog themselves.

Error messages sent to the console have a carriage return and a line feed appended to them, rather than just a line feed.

參見 SEE ALSO¶

termcap(5), lpc(8), lpd(8), pac(8), lpr(1), lpq(1), lprm(1)
4.3 BSD Line Printer Spooler Manual.

歷史 HISTORY¶

The printcap file format appeared in 4.2BSD..

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[中文版最新更新]¶

1997.01.01

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