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1 See the file VMSINSTALL for VMS installation information.
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2
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3 * Deficiencies of VMS GNU Emacs
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4
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5 All GNU Emacs features which on Unix work by running a Unix utility
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6 in a subprocess currently do not work on VMS.
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7
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8 These include Dired, listing a file directory, reading and sending
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9 mail, reading and posting netnews, spelling correction, displaying the
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10 time and load in the mode line, queueing output for printing, and the
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11 `sort-columns' command. Naturally, the commands to view Unix manual
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12 pages and execute Unix shell commands also do not work.
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13
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14 It is not possible to fix these problems in a general way on VMS
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15 because they involve interfaces to parts of the operating system which
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16 work very differently on VMS. Each feature must be reimplemented
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17 individually.
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18
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19 I hope that someone will send me an implementation for directory listing
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20 on VMS. This should not be very hard to do. Most of the code you need
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21 is already provided in [.src]dired.c.
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22
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23 The normal commands for running an inferior shell or lisp with I/O
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24 through an Emacs buffer do not work on VMS, but you can instead create
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25 a DCL subprocess which does I/O through an Emacs buffer and get a
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26 similar effect. See the file [.lisp]vms-patch.el.
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27
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28 * Specifying terminal type.
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29
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30 To specify a terminal type for Emacs that is not known to VMS,
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31 define the logical name EMACS_TERM with the terminal type as value.
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32 Terminal types are looked up in the termcap data base, which is
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33 found as the file `[etc]termcap.dat' in the Emacs distribution.
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34
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35 * Specifying file names.
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36
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37 GNU Emacs accepts both Unix and VMS file name syntax. Most Lisp
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38 code that runs in Emacs uses Unix syntax so it can run everywhere.
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39 Users on VMS will generally type file names with VMS syntax.
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40
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41 The EMACSLOADPATH logical name, if you use it, should contain
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42 directory names in Unix syntax, separated by commas.
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43
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44 find-file prompts with the current directory. You can then type a
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45 relative directory spec to get somewhere else in the hirearchy. For
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46 instance:
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47
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48 Find File: emacs_library:[src][-.lisp]startup.el
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49
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50 is converted to emacs_library:[lisp]startup.el by
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51 expand-file-name. The basic rule is:
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52 ][- is treated like /.. (dir:[file.sub][-.other] ==> dir:[file.other],
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53 dir:[file.sub][-] ==> dir:[file])
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54 ][. elides the ][ (dir:[file][.sub] ==> dir:[file.sub])
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55 ][alpha backs up to the previous [ (dir:[file][other] ==> dir:[other])
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56 a colon appearing after a ] forces a new "root" disk.
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57 (dev:[file]dev2:[other] ==> dev2:[other])
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58 expand-file-name also tries to be smart about decnet node names,
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59 but this is not yet known to work.
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60
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61 * A possible problem.
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62
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63 For VMS versions 4.4 and up, make sure the file
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64 SYS$SYSTEM:RIGHTSLIST.DAT has WORLD:R access. Emacs reads this file
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65 to check file access. If this file does not have appropriate access,
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66 Emacs may think that you cannot write any files.
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67
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68
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