lp

The actual writing to the output device may occur some time after the lp utility successfully exits. During the portion of the writing that corresponds to each input file, the implementation shall guarantee exclusive access to the device. The lp utility shall associate a unique request ID with each request. Exit only after further access to any of the input files is no longer required. The application can then safely delete or modify the files without affecting the output operation. Normally, files are not copied, but are linked whenever possible. If the -c option is not given, then the user should be careful not to remove any of the files before the request has been printed in its entirety. It should also be noted that in the absence of the -c option, any changes made to the named files after the request is made but before it is printed may be reflected in the printed output. On some implementations, -c may be on by default. If -d is not specified, and neither the LPDEST nor PRINTER environment variable is set, an unspecified destination is used. The -d dest option shall take precedence over LPDEST, which in turn shall take precedence over PRINTER. Results are undefined when dest contains a value that is not a valid destination name. Send mail (see mailx ) after the files have been printed. By default, no mail is sent upon normal completion of the print request. Write copies number of copies of the files, where copies is a positive decimal integer. The methods for producing multiple copies and for arranging the multiple copies when multiple file operands are used are unspecified, except that each file shall be output as an integral whole, not interleaved with portions of other files. Write a message on the user's terminal after the files have been printed. If the user is not logged in, then mail shall be sent instead. Provide a default value for the internationalization variables that are unset or null. (See XBD Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.) If set to a non-empty string value, override the values of all the other internationalization variables. Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multi-byte characters in arguments and input files). Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error and informative messages written to standard output. Determine the format and contents of date and time strings displayed in the lp banner page, if any. Determine the destination. If the LPDEST environment variable is not set, the PRINTER environment variable shall be used. The -d dest option takes precedence over LPDEST. Results are undefined when -d is not specified and LPDEST contains a value that is not a valid destination name. [XSI) ] ![[Option Start]]( Determine the location of message catalogs for the processing of LC MESSAGES. ![[Option End]]( Determine the output device or destination. If the LPDEST and PRINTER environment variables are not set, an unspecified output device is used. The -d dest option and the LPDEST environment variable shall take precedence over PRINTER. Results are undefined when -d is not specified, LPDEST is unset, and PRINTER contains a value that is not a valid device or destination name. The pr and fold utilities can be used to achieve reasonable formatting for the implementation's default page size. Although the historical System V lp and BSD lpr utilities have provided similar functionality, they used different names for the environment variable specifying the destination printer. Since the name of the utility here is lp , LPDEST (used by the System V lp utility) was given precedence over PRINTER (used by the BSD lpr utility). Since environments of users frequently contain one or the other environment variable, the lp utility