Mercurial > hg > xemacs-beta
comparison vms/VMSNOTES @ 0:376386a54a3c r19-14
Import from CVS: tag r19-14
| author | cvs |
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| date | Mon, 13 Aug 2007 08:45:50 +0200 |
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| -1:000000000000 | 0:376386a54a3c |
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| 1 See the file VMSINSTALL for VMS installation information. | |
| 2 | |
| 3 * Deficiencies of VMS GNU Emacs | |
| 4 | |
| 5 All GNU Emacs features which on Unix work by running a Unix utility | |
| 6 in a subprocess currently do not work on VMS. | |
| 7 | |
| 8 These include Dired, listing a file directory, reading and sending | |
| 9 mail, reading and posting netnews, spelling correction, displaying the | |
| 10 time and load in the mode line, queueing output for printing, and the | |
| 11 `sort-columns' command. Naturally, the commands to view Unix manual | |
| 12 pages and execute Unix shell commands also do not work. | |
| 13 | |
| 14 It is not possible to fix these problems in a general way on VMS | |
| 15 because they involve interfaces to parts of the operating system which | |
| 16 work very differently on VMS. Each feature must be reimplemented | |
| 17 individually. | |
| 18 | |
| 19 I hope that someone will send me an implementation for directory listing | |
| 20 on VMS. This should not be very hard to do. Most of the code you need | |
| 21 is already provided in [.src]dired.c. | |
| 22 | |
| 23 The normal commands for running an inferior shell or lisp with I/O | |
| 24 through an Emacs buffer do not work on VMS, but you can instead create | |
| 25 a DCL subprocess which does I/O through an Emacs buffer and get a | |
| 26 similar effect. See the file [.lisp]vms-patch.el. | |
| 27 | |
| 28 * Specifying terminal type. | |
| 29 | |
| 30 To specify a terminal type for Emacs that is not known to VMS, | |
| 31 define the logical name EMACS_TERM with the terminal type as value. | |
| 32 Terminal types are looked up in the termcap data base, which is | |
| 33 found as the file `[etc]termcap.dat' in the Emacs distribution. | |
| 34 | |
| 35 * Specifying file names. | |
| 36 | |
| 37 GNU Emacs accepts both Unix and VMS file name syntax. Most Lisp | |
| 38 code that runs in Emacs uses Unix syntax so it can run everywhere. | |
| 39 Users on VMS will generally type file names with VMS syntax. | |
| 40 | |
| 41 The EMACSLOADPATH logical name, if you use it, should contain | |
| 42 directory names in Unix syntax, separated by commas. | |
| 43 | |
| 44 find-file prompts with the current directory. You can then type a | |
| 45 relative directory spec to get somewhere else in the hirearchy. For | |
| 46 instance: | |
| 47 | |
| 48 Find File: emacs_library:[src][-.lisp]startup.el | |
| 49 | |
| 50 is converted to emacs_library:[lisp]startup.el by | |
| 51 expand-file-name. The basic rule is: | |
| 52 ][- is treated like /.. (dir:[file.sub][-.other] ==> dir:[file.other], | |
| 53 dir:[file.sub][-] ==> dir:[file]) | |
| 54 ][. elides the ][ (dir:[file][.sub] ==> dir:[file.sub]) | |
| 55 ][alpha backs up to the previous [ (dir:[file][other] ==> dir:[other]) | |
| 56 a colon appearing after a ] forces a new "root" disk. | |
| 57 (dev:[file]dev2:[other] ==> dev2:[other]) | |
| 58 expand-file-name also tries to be smart about decnet node names, | |
| 59 but this is not yet known to work. | |
| 60 | |
| 61 * A possible problem. | |
| 62 | |
| 63 For VMS versions 4.4 and up, make sure the file | |
| 64 SYS$SYSTEM:RIGHTSLIST.DAT has WORLD:R access. Emacs reads this file | |
| 65 to check file access. If this file does not have appropriate access, | |
| 66 Emacs may think that you cannot write any files. | |
| 67 | |
| 68 |