elvprsv(8) [minix man page]
ELVPRSV(8) System Manager's Manual ELVPRSV(8) NAME
elvprsv - Preserve the the modified version of a file after a crash. SYNOPSIS
elvprsv ["-why elvis died"] /tmp/filename... elvprsv -R /tmp/filename... DESCRIPTION
elvprsv preserves your edited text after elvis dies. The text can be recovered later, via the elvprsv program. For UNIX-like systems, you should never need to run this program from the command line. It is run automatically when elvis is about to die, and it should be run (via /etc/rc) when the computer is booted. THAT'S ALL! For non-UNIX systems such as MS-DOS, you can either use elvprsv the same way as under UNIX systems (by running it from your AUTOEXEC.BAT file), or you can run it separately with the "-R" flag to recover the files in one step. If you're editing a file when elvis dies (due to a bug, system crash, power failure, etc.) then elvprsv will preserve the most recent ver- sion of your text. The preserved text is stored in a special directory; it does NOT overwrite your text file automatically. elvprsv will send mail to any user whose work it preserves, if your operating system normally supports mail. FILES
/tmp/elv* The temporary file that elvis was using when it died. /usr/preserve/p* The text that is preserved by elvprsv. /usr/preserve/Index A text file which lists the names of all preserved files, and the names of the /usr/preserve/p* files which contain their preserved text. BUGS
Due to the permissions on the /usr/preserve directory, on UNIX systems elvprsv must be run as superuser. This is accomplished by making the elvprsv executable be owned by "root" and turning on its "set user id" bit. If you're editing a nameless buffer when elvis dies, then elvprsv will pretend that the file was named "foo". AUTHOR
Steve Kirkendall kirkenda@cs.pdx.edu ELVPRSV(8)
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ex(1) General Commands Manual ex(1) Name ex, edit - text editor Syntax ex [ - ] [ -v ] [ -x ] [ -t tag ] [ -r ] [ +command ] [ -l ] name... edit [ ex options ] Description The editor is the root of a family of editors: and The editor is a superset of with the most notable extension being a display-editing facility. Display-based editing is the focus of The name argument indicates the files to be edited. Options - Suppresses all interactive-user feedback. This option is useful in processing editor scripts in command files. -v Equivalent to using rather than -t Equivalent to an initial tag command, that is, editing the file containing the tag and positioning the editor at its definition. -r Used to recover after an editor or system crash. It recovers by retrieving the last saved version of the named file. If no file is specified, it displays a list of saved files. -R Sets the read-only option at the start. +command Indicates that the editor should begin by executing the specified command. If the command is omitted, it defaults to $, positioning the editor at the last line of the first file, initially. Other useful commands here are scanning patterns of the form +/pattern or line numbers. -l Sets up for LISP. That is, it sets the showmatch and lisp options. The -x option is available only if the Encryption layered product is installed. -x Causes to prompt for a key. The key is used to encrypt and decrypt the contents of the file. If the file contents have been encrypted with one key, you must use the same key to decrypt them. Restrictions The command causes all marks to be lost on lines changed and then restored if the marked lines were changed. The command does not clear the buffer modified condition. The z command prints a number of logical rather than physical lines. More than a screenful of output may result if long lines are present. File input/output errors do not print a name if the command line minus sign (-) option is used. There is no easy way to do a single scan ignoring case. The editor does not warn you if you place text in named buffers and do not use it before exiting the editor. Null characters are discarded from input files, and cannot appear in output files. Files /usr/lib/ex?.?recover recover command /usr/lib/ex?.?preserve preserve command /etc/termcap terminal capabilities ~/.exrc editor startup file /tmp/Exnnnnn editor temporary /tmp/Rxnnnnn named buffer temporary /usr/preserve preservation directory See Also awk(1), ed(1), grep(1), sed(1), vi(1), termcap(5), environ(7) "Edit: A Tutorial" and the "Ex Reference Manual" in the Supplementary Documents, Volume 1: General User ex(1)