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Diffstat (limited to 'man4/lp.4')
| -rw-r--r-- | man4/lp.4 | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/man4/lp.4 b/man4/lp.4 deleted file mode 100644 index aa4376b..0000000 --- a/man4/lp.4 +++ /dev/null @@ -1,137 +0,0 @@ -'\" t -.\" Copyright (c) Michael Haardt (michael@cantor.informatik.rwth-aachen.de), -.\" Sun Jan 15 19:16:33 1995 -.\" -.\" SPDX-License-Identifier: GPL-2.0-or-later -.\" -.\" Modified, Sun Feb 26 15:02:58 1995, faith@cs.unc.edu -.TH lp 4 2023-02-05 "Linux man-pages 6.7" -.SH NAME -lp \- line printer devices -.SH SYNOPSIS -.nf -.B #include <linux/lp.h> -.fi -.SH CONFIGURATION -\fBlp\fP[0\[en]2] are character devices for the parallel line printers; -they have major number 6 and minor number 0\[en]2. -The minor numbers -correspond to the printer port base addresses 0x03bc, 0x0378, and 0x0278. -Usually they have mode 220 and are owned by user -.I root -and group -.IR lp . -You can use printer ports either with polling or with interrupts. -Interrupts are recommended when high traffic is expected, for example, -for laser printers. -For typical dot matrix printers, polling will usually be enough. -The default is polling. -.SH DESCRIPTION -The following -.BR ioctl (2) -calls are supported: -.TP -.BR "int ioctl(int " fd ", LPTIME, int " arg ) -Sets the amount of time that the driver sleeps before rechecking the printer -when the printer's buffer appears to be filled to -.IR arg . -If you have a fast printer, decrease this number; -if you have a slow printer, then increase it. -This is in hundredths of a second, the default 2 -being 0.02 seconds. -It influences only the polling driver. -.TP -.BR "int ioctl(int " fd ", LPCHAR, int " arg ) -Sets the maximum number of busy-wait iterations which the polling driver does -while waiting for the printer to get ready for receiving a character to -.IR arg . -If printing is too slow, increase this number; if the -system gets too slow, decrease this number. -The default is 1000. -It influences only the polling driver. -.TP -.BR "int ioctl(int " fd ", LPABORT, int " arg ) -If -.I arg -is 0, the printer driver will retry on errors, otherwise -it will abort. -The default is 0. -.TP -.BR "int ioctl(int " fd ", LPABORTOPEN, int " arg ) -If -.I arg -is 0, -.BR open (2) -will be aborted on error, otherwise error will be ignored. -The default is to ignore it. -.TP -.BR "int ioctl(int " fd ", LPCAREFUL, int " arg ) -If -.I arg -is 0, then the out-of-paper, offline, and error signals are -required to be false on all writes, otherwise they are ignored. -The default is to ignore them. -.TP -.BR "int ioctl(int " fd ", LPWAIT, int " arg ) -Sets the number of busy waiting iterations to wait before strobing the -printer to accept a just-written character, and the number of iterations to -wait before turning the strobe off again, -to -.IR arg . -The specification says this time should be 0.5 -microseconds, but experience has shown the delay caused by the code is -already enough. -For that reason, the default value is 0. -.\" FIXME . Actually, since Linux 2.2, the default is 1 -This is used for both the polling and the interrupt driver. -.TP -.BR "int ioctl(int " fd ", LPSETIRQ, int " arg ) -This -.BR ioctl (2) -requires superuser privileges. -It takes an -.I int -containing the new IRQ as argument. -As a side effect, the printer will be reset. -When -.I arg -is 0, the polling driver will be used, which is also default. -.TP -.BR "int ioctl(int " fd ", LPGETIRQ, int *" arg ) -Stores the currently used IRQ in -.IR arg . -.TP -.BR "int ioctl(int " fd ", LPGETSTATUS, int *" arg ) -Stores the value of the status port in -.IR arg . -The bits have the following meaning: -.TS -l l. -LP_PBUSY inverted busy input, active high -LP_PACK unchanged acknowledge input, active low -LP_POUTPA unchanged out-of-paper input, active high -LP_PSELECD unchanged selected input, active high -LP_PERRORP unchanged error input, active low -.TE -.IP -Refer to your printer manual for the meaning of the signals. -Note that undocumented bits may also be set, depending on your printer. -.TP -.BR "int ioctl(int " fd ", LPRESET)" -Resets the printer. -No argument is used. -.SH FILES -.I /dev/lp* -.\" .SH AUTHORS -.\" The printer driver was originally written by Jim Weigand and Linus -.\" Torvalds. -.\" It was further improved by Michael K.\& Johnson. -.\" The interrupt code was written by Nigel Gamble. -.\" Alan Cox modularized it. -.\" LPCAREFUL, LPABORT, LPGETSTATUS were added by Chris Metcalf. -.SH SEE ALSO -.BR chmod (1), -.BR chown (1), -.BR mknod (1), -.BR lpcntl (8), -.BR tunelp (8) |