| 1 | This is the info file for inclusion with the VMS port of TCSH. |
|---|
| 2 | |
|---|
| 3 | ---- |
|---|
| 4 | System Requirements: |
|---|
| 5 | |
|---|
| 6 | o VAX running VMS version V5.5 or above. |
|---|
| 7 | |
|---|
| 8 | o VMS/Posix installed and configured with a container file system. |
|---|
| 9 | (^ comes free with the operating system) |
|---|
| 10 | |
|---|
| 11 | o An /etc/termcap file that contains entries for vtxxx_series |
|---|
| 12 | |
|---|
| 13 | o A friendly system manager. |
|---|
| 14 | |
|---|
| 15 | o About an hour. (VS 4000/60) |
|---|
| 16 | |
|---|
| 17 | ---- |
|---|
| 18 | Installation: |
|---|
| 19 | |
|---|
| 20 | 1. untar the file. |
|---|
| 21 | 2. copy the config.vms file from config/ to the directory that |
|---|
| 22 | holds the tcsh source, rename to be config.h |
|---|
| 23 | 3. rename Makefile.vms to be Makefile |
|---|
| 24 | 4. Type |
|---|
| 25 | psx> make |
|---|
| 26 | 5. Wait for an hour. |
|---|
| 27 | a) The construction of tc.const.h will take about 20 mins |
|---|
| 28 | on a vs4000/60 |
|---|
| 29 | b) Read the man pages.(see note about man pages) |
|---|
| 30 | |
|---|
| 31 | 6) If you want to install TCSH as the default shell instead of ksh add the |
|---|
| 32 | following line to POSIX$USER_PARAMS.DAT |
|---|
| 33 | |
|---|
| 34 | SHELL /usr/local/bin/tcsh |
|---|
| 35 | |
|---|
| 36 | You may not include flags on the command line. This line is used |
|---|
| 37 | to create the executive mode logical name POSIX$SHELL. |
|---|
| 38 | In creating this logical name flags are ignored, so a login shell |
|---|
| 39 | is not possible. |
|---|
| 40 | |
|---|
| 41 | 7) TCSH-VMS will use the file /etc/csh.cshrc to provide the equivalent |
|---|
| 42 | of a sys$sylogin.com, suggested contents are below. |
|---|
| 43 | You will probably need to make this file using the SYSTEM account. |
|---|
| 44 | |
|---|
| 45 | ---- |
|---|
| 46 | Notes: |
|---|
| 47 | |
|---|
| 48 | This is not a definition of the capabilities of VMS/Posix. |
|---|
| 49 | Refer to `Guide to using VMS/Posix' etc... |
|---|
| 50 | |
|---|
| 51 | VMS/Posix is the OPEN part of OPEN/VMS. It consists of three |
|---|
| 52 | main sections. |
|---|
| 53 | |
|---|
| 54 | - The POSIX Libraries, which are system interfaces |
|---|
| 55 | adhering to the Callable Interface standards IEEE 1003.1, |
|---|
| 56 | 1003.1a and 1003.2 and most of 1003.4 (real time). |
|---|
| 57 | - The POSIX Commands and utilities, 1003.2 (Classic Utilities) |
|---|
| 58 | some of the Software Development utilities. |
|---|
| 59 | - The VMS/Posix Shell, a Korn Shell variant. |
|---|
| 60 | |
|---|
| 61 | TCSH has been ported to be POSIX Conformant. The one thing preventing |
|---|
| 62 | `Strict POSIX Conformance' is the use of Termcap routines that |
|---|
| 63 | require the presence of a /dev/termcap. Once code has been written |
|---|
| 64 | to use the library routines tcgetattr etc, the source will be |
|---|
| 65 | strictly POSIX conformant. |
|---|
| 66 | |
|---|
| 67 | TCSH has certain features missing or disabled. |
|---|
| 68 | |
|---|
| 69 | - UTMP facilities, this is related to most of the |
|---|
| 70 | inter-user stuff like watchlog. |
|---|
| 71 | - Resource limit access. |
|---|
| 72 | - Access to passwd tag in the passwd structure. |
|---|
| 73 | (use DCL for user admin functions) |
|---|
| 74 | - Other items may be missing or behave in an unexpected |
|---|
| 75 | manner. It has not been possible to test and debug all the |
|---|
| 76 | features of TCSH on VMS as yet. |
|---|
| 77 | |
|---|
| 78 | ---- |
|---|
| 79 | Features and known bugs: |
|---|
| 80 | |
|---|
| 81 | 1) The VMS/Posix MAN command is a drop through to DCL help. |
|---|
| 82 | It seems to assume it will always be running from ksh. To use define |
|---|
| 83 | the alias |
|---|
| 84 | alias man '/bin/sh /bin/man \!*' |
|---|
| 85 | in your /etc/csh.cshrc |
|---|
| 86 | This fixes the problem. |
|---|
| 87 | |
|---|
| 88 | 2) There is a problem with the way TCSH initialises the current working |
|---|
| 89 | directory ($cwd, environment variable PWD) |
|---|
| 90 | Put the command |
|---|
| 91 | cd |
|---|
| 92 | in /etc/csh.cshrc as a workaround. |
|---|
| 93 | For the curious; |
|---|
| 94 | The version of getwd i use is the subroutine in TCSH rather than the |
|---|
| 95 | getcwd from the posix library. |
|---|
| 96 | The tcsh version xgetcwd in tc.os.c will search up the tree, by |
|---|
| 97 | stat()'ing and opening the parent directory, to build up the CWD path. |
|---|
| 98 | All works well until it hits the root directory. At this point it is |
|---|
| 99 | usually looking for a file with st_ino =0 and st_dev = 0, (the default |
|---|
| 100 | numbers assigned to the mount point of a VMS filesystem in the '/' |
|---|
| 101 | directory.) which is the first file it comes across. This, due to the |
|---|
| 102 | way UCX starts is /vms. |
|---|
| 103 | eg. I am in /u1/atp/fred. |
|---|
| 104 | xgetwd looks at '.' gets the st_ino and st_dev. goes to '..' opens |
|---|
| 105 | it and gets the name associated with inode and dev from before. CWD now |
|---|
| 106 | holds "fred". I now repeat the process one layer up. CWD now becomes |
|---|
| 107 | "atp/fred". The problems now start with the stat of '.' at this point. |
|---|
| 108 | stat() returns a st_ino and st_dev of 0. - i don't know why. When i open |
|---|
| 109 | '..' and read it i get the first name that matches an inode of '0' and |
|---|
| 110 | a device of '0' - which is /vms. now my CWD is set to be "/vms/atp/fred" |
|---|
| 111 | This is a problem, as /vms/atp/fred does not exist. That is my understanding |
|---|
| 112 | of the problem. |
|---|
| 113 | This throws the history mechanism, terminal handling, and man pages |
|---|
| 114 | for some reason. I worked around it by putting a |
|---|
| 115 | 'cd' in my /etc/csh.cshrc which effectively copies the contents of $HOME |
|---|
| 116 | into $PWD. |
|---|
| 117 | |
|---|
| 118 | 3) termcap problem |
|---|
| 119 | If the value of term is not a recognised one (vt200_series, vt300_series) |
|---|
| 120 | then shell utilities like 'more' will complain. Unless your /etc/termcap |
|---|
| 121 | has entries for vt300_series, you will not be able to use %U %B et al, and |
|---|
| 122 | anything else that uses the termcap entries. |
|---|
| 123 | |
|---|
| 124 | 4) Line editing problem |
|---|
| 125 | Occasionally the line editing becomes corrupted. This is probably due |
|---|
| 126 | to a conflict in the use of both termios and termcap routines. |
|---|
| 127 | |
|---|
| 128 | 5) TCSH expects to be installed in /usr/local/bin - you may change this |
|---|
| 129 | in Makefile.vms or create /usr/local/bin. |
|---|
| 130 | |
|---|
| 131 | 6) If you have problems with reading things on the path - substitute |
|---|
| 132 | /bin/ for /bin in pathnames.h - VMS/Posix uses symbolic links for all |
|---|
| 133 | the top level directories. |
|---|
| 134 | |
|---|
| 135 | 7) If the shell complains that a command is not found check to see if |
|---|
| 136 | there are multiple version numbers in /bin/ eg. tar..1 tar..2 . if |
|---|
| 137 | there are, get the sysmanager to purge this directory. |
|---|
| 138 | |
|---|
| 139 | --------- |
|---|
| 140 | suggested csh.cshrc |
|---|
| 141 | --- |
|---|
| 142 | # model csh.cshrc |
|---|
| 143 | alias man '/bin/sh /bin/man \!*' |
|---|
| 144 | cd |
|---|
| 145 | set history 50 |
|---|
| 146 | stty sane |
|---|
| 147 | #end |
|---|
| 148 | --- |
|---|
| 149 | |
|---|
| 150 | I read vmsnet.vms-posix, It is a low volume newsgroup, so i tend to |
|---|
| 151 | read all articles, if E-mail fails to work for you get me there. |
|---|
| 152 | |
|---|
| 153 | I Release the work I have done in porting this to VMS/Posix into the |
|---|
| 154 | public domain under the conditions imposed by the headers contained |
|---|
| 155 | in the source code. I accept no Liability either express or implied |
|---|
| 156 | for any damage or loss arising from the use or failure of this code. |
|---|
| 157 | Have a nice day. |
|---|
| 158 | |
|---|
| 159 | Andy Phillips |
|---|
| 160 | Mullard Space Science Lab. 92/10/07 |
|---|
| 161 | Holmbury St. Mary. 19709::atp |
|---|
| 162 | Surrey. atp@uk.ac.ucl.mssl |
|---|
| 163 | England. |
|---|
| 164 | |
|---|
