Developers' Corner

---

<div style="text-align:right;font-size:smaller">EpicsTipsAndTricksCrisAxisAddtionForSeveralEpicsApplications <a href="/edit/Epics/EpicsTipsAndTricksCrisAxisAddtionForSeveralEpicsApplications">(edit)</a></div>

cris-axis addition for several EPICS applications

HOWTO build flex (libfl) for cris-axis crisv32-axis

Since some of the EPICS extensions and modules rely on libfl flex and the standard distribution of AXIS SDK doesn't contain the libfl.a this has to be added:

Prerequisites

• Axis SDK
• cross compiler

Build & Installation

1. set some helper variables:
   export SRC_DIR=<Source Directory>
export DOWNLOAD_DIR=<Download Directory>
# provided cross compiler and SDK are installed here export ETRAX_DIR=<ETRAX Tools Directory>
2. download sources from http://sourceforge.net/projects/flex/ (version 2.5.35) via direct link to $DOWNLOAD_DIR
   mkdir -p ${DOWNLOAD_DIR:?undefined} &&
wget http://prdownloads.sourceforge.net/flex/flex-2.5.35.tar.bz2?download
3. unpack to $SRC_DIR
   mkdir -p ${SRC_DIR:?undefined} &&
cd SRC_DIR &&
tar -jxvf flex-2.5.35.tar.bz
4. Source cris-axis-setup.sh ,defining environment variables, e.g. AXIS_TOP_DIR, and extending PATH, needs ETRAX_DIR to be defined.
   cd ${SRC_DIR:?undefined} &&
wget https://wiki.gsi.de/pub/Epics/EpicsTipsAndTricksCrisAxisAddtionForSeveralEpicsApplications/cris-axis-setup.sh &&
source cris-axis-setup.sh
   or just take its main code:
   oldpwd=$OLDPWD
base=$(pwd)
cd ${ETRAX_DIR:?undefined)/SDK && cd $(ls --color=never -t -1 -d devbo* | head -n 1) && . ./init_env
cd $base
cd ${ETRAX_DIR:?undefined)/ETRAX/compiler && . ./setup.sh
cd $oldpwd
cd $base
unset scriptname base oldpwd epicsDir
5. Change to source directory $SRC_DIR
   cd ${SRC_DIR:?undefined}
6. Since configure automatically sets for cross-compilers 'ac_cv_func_malloc_0_nonnull' and 'ac_cv_func_realloc_0_nonnull' to 'no', (since it cannot check it) those have to be configured by hand:
   1. cris-axis
      1. export myTARGET=cris-axis-linux-gnu
      2. make clean
      3. ./configure --prefix=${AXIS_TOP_DIR:?undefined}/target/${myTARGET:?defined}/usr --host=${myTARGET} --build=i686-pc-linux-gnu ac_cv_func_realloc_0_nonnull=yes ac_cv_func_malloc_0_nonnull=yes
      4. make
      5. make install
   2. crisv32-axis
      1. export myTARGET=crisv32-axis-linux-gnu
      2. make clean
      3. ./configure --prefix=${AXIS_TOP_DIR:?undefined}/target/${myTARGET:?defined}/usr --host=${myTARGET} --build=i686-pc-linux-gnu ac_cv_func_realloc_0_nonnull=yes ac_cv_func_malloc_0_nonnull=yes
      4. make
      5. make install

Compact

export SRC_DIR=<Source Directory>
export DOWNLOAD_DIR=<Download Directory>
# provided cross compiler and SDK are installed here
export ETRAX_DIR=<ETRAX Tools Directory>

mkdir -p ${DOWNLOAD_DIR:?undefined} &&
wget http://prdownloads.sourceforge.net/flex/flex-2.5.35.tar.bz2?download

mkdir -p ${SRC_DIR:?undefined} &&
cd SRC_DIR &&
tar -jxvf flex-2.5.35.tar.bz

oldpwd=$OLDPWD
base=$(pwd)
cd ${ETRAX_DIR:?undefined)/SDK && cd $(ls --color=never -t -1 -d devbo* | head -n 1) && . ./init_env
cd $base
cd ${ETRAX_DIR:?undefined)/ETRAX/compiler && . ./setup.sh
cd $oldpwd
cd $base
unset scriptname base oldpwd epicsDir

# crisv-axis
export myTARGET=cris-axis-linux-gnu
cd ${SRC_DIR:?undefined} &&
make clean
./configure --prefix=${AXIS_TOP_DIR:?undefined}/target/${myTARGET:?defined}/usr --host=${myTARGET} --build=i686-pc-linux-gnu ac_cv_func_realloc_0_nonnull=yes ac_cv_func_malloc_0_nonnull=yes &&
make && make install

# crisv32-axis
export myTARGET=crisv32-axis-linux-gnu
cd ${SRC_DIR:?undefined} &&
make clean
./configure --prefix=${AXIS_TOP_DIR:?undefined}/target/${myTARGET:?defined}/usr --host=${myTARGET} --build=i686-pc-linux-gnu ac_cv_func_realloc_0_nonnull=yes ac_cv_func_malloc_0_nonnull=yes &&
make && make install



---

<div style="text-align:right;font-size:smaller">EpicsTipsAndTricksNewIocCommand <a href="/edit/Epics/EpicsTipsAndTricksNewIocCommand">(edit)</a></div>

new IOC command

The general way how to add a new IOC command, which can be used inside the IOC Shell is described in Chapter 18.3 IOC Shell - IOC Shell Programming of the IOC Application Developer's Guide (3.14.9).

Here is an example (with the help of BK) to make the command dumpTable(mbo, dac, channel, type) available at the IOC shell.

• application.c

#include <epicsExport.h>

/* ... */ 

/***************************************************************************/
static void dumpTable(int mbo, int dac, int channel, short type)
{
  /* some function code */
  /* ... */ 
}
/***************************************************************************/

/* Information needed by iocsh */
/* Argument definition */
static const iocshArg  dumpTableArg0 = {"mbo number",     iocshArgInt};
static const iocshArg  dumpTableArg1 = {"dac number",     iocshArgInt};
static const iocshArg  dumpTableArg2 = {"channel number", iocshArgInt};
static const iocshArg  dumpTableArg3 = {"table type",     iocshArgInt};
static const iocshArg  *dumpTableArgs[] = 
{
  &dumpTableArg0,
  &dumpTableArg1,
  &dumpTableArg2,
  &dumpTableArg3
};
/* Function definition */
static const iocshFuncDef dumpTableFuncDef = {"dumpTable", 4, dumpTableArgs};

/* Wrapper called by iocsh, selects the argument types that dumpTable needs */
static void dumpTableCallFunc(const iocshArgBuf *args) {
  dumpTable(args[0].ival, args[1].ival, args[2].ival, args[3].ival);
}

/* Registration routine, runs at startup */
static void dumpTableRegister(void) {
    iocshRegister(&dumpTableFuncDef, dumpTableCallFunc);
}
epicsExportRegistrar(dumpTableRegister);

• application.dbd

variable(mySubDebug)
...
registrar(dumpTableRegister)

---

<div style="text-align:right;font-size:smaller">EpicsTipsAndTricksUseOfMsiWithMultipleTempleateFiles <a href="/edit/Epics/EpicsTipsAndTricksUseOfMsiWithMultipleTempleateFiles">(edit)</a></div>

use of msi with multiple template files

To produce a single db file from multiple template files it is sufficient to include in the Makefile in the app/Db directory the line with the name of the db. This should be a not existing file (because it will be produced). Existing must be the corresponding substitutions file and the template file(s). In case that the substitutions file calls to a multiple template files is necessary to have an independent name from them, otherwise the generated db file will be only based on the same name template file.

Be aware that none of the template files should have the same name as the substitutions file.

Example: To make a db called vulom_1.db use a file vulom_1.substitutions which references for instance vulom.template, vulomreg.template, and vulomreg1.template

vulom_1.substitutions:

file vulom.template {
{ PRE=HAD, NN="0", MM="1"}
}
file vulomreg.template {
{ PRE=HAD, NN="0", MM="1", CC="Del_0", AA="0", LIM="49.5", GAIN="3.3", LLIM="0"}
{ PRE=HAD, NN="0", MM="1", CC="Del_1", AA="1", LIM="49.5", GAIN="3.3", LLIM="0"}
}
file vulomreg1.template {
{ PRE=HAD, NN="0", MM="1", CC="Down_0", AA="7", LIM="15", GAIN="1"}
{ PRE=HAD, NN="0", MM="1", CC="Down_1", AA="8", LIM="15", GAIN="1"}
}

The Makefile should contain a line

DB += vulom_1.db

additional Dependencies

Adding the line in the Makefile

vulom_1_DEPENDS ?= $(shell perl -n -e 'if (/file\s+(\w+.template)/) {print "$$1 \n";}' vulom_1.substitutions )

right after the previous

DB += vulom_1.db

enables EPICS to check for dependencies (q.v. IOC Application Developer's Guide - 3.14.9 Chapter 4.6.4):

If a <name> substitutions file contains "file" references to other input files, these referenced files should be made dependencies of the created <name>.db by adding a dependency definition line:
<name>_DEPENDS = <filename1> <filename2> ...

---

---

Applications & Use Cases

The idea is to place here some (external) EPICS applications and use cases (or links to them).

Getting started using Stream Devices

A well documented introduction of the PANDA group at Bochum, Germany, of using StreamDevice accessing exemplarily an I-7565 USB/CAN Converter
http://panda-wiki.gsi.de/cgi-bin/view/DCS/EPICSstartUsingStreamDev

-- PeterZumbruch - 07 Apr 2010

---

Windows tricks & tips

<div style="text-align:right"><a style="font-size:smaller" href="/edit/Epics/WindowsTricksTips">edit</a></div>
%FOREACH{"item" in="TippsWindowsResizeRawImgFileUsingVirtualBox"}%

Resize Raw Img File Using VirtualBox

edit
Following the recommendation on http://raspberrypi.stackexchange.com/questions/4943/resize-image-file-before-writing-to-sd-card:
• e.g. to resize to 15.5GB, approx. size 15500
  

set VBOXMANAGE="C:\Program Files\Oracle\VirtualBox\VBoxManage.exe"
IF NOT EXIST %VBOXMANAGE% (
   echo %VBOXMANAGE% does not exist ... exiting)
)
ELSE (
   IF EXIST input.vdi   ( %VBOXMANAGE% closemedium disk input.vdi --delete)
   IF EXIST output.vdi ( %VBOXMANAGE% closemedium disk output.vdi --delete) 
   IF EXIST output.img (%VBOXMANAGE% closemedium disk output.img)
    
   REM  use without .img
   set /p INPUT_NAME="Enter input file name without .img: "; 
   set OUTPUT_NAME=%INPUT_NAME%_resized 
   set /p OUTPUT_SIZE="Enter Size (MB) (e.g. 15000): "  
    
   ECHO "=========================================================================" 
   %VBOXMANAGE% convertfromraw %INPUT_NAME%.img input.vdi -format VDI --variant Standard 
   ECHO "=========================================================================" 
   %VBOXMANAGE% createhd --filename output.vdi --size %OUTPUT_SIZE% --format VDI --variant Standard 
   ECHO "=========================================================================" 
   %VBOXMANAGE% clonehd input.vdi output.vdi --existing 
   ECHO "=========================================================================" 
   %VBOXMANAGE% clonehd output.vdi output.img --format RAW 
   copy output.img %OUTPUT_NAME%.img 
   %VBOXMANAGE% closemedium disk input.vdi --delete 
   %VBOXMANAGE% closemedium disk output.vdi --delete 
   %VBOXMANAGE% closemedium disk output.img 
)

-- WikiGuest - 1970-01-01
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%NEXT{"item"}%
%FOREACH{"item" in="TipsWindowsHowToCloneASDCard"}%

Windows: How To Clone A SD Card

<div style="text-align:right"><a style="font-size:smaller" href="/edit/Epics/TipsWindowsHowToCloneASDCard">edit</a></div>
Following the help of page https://startingelectronics.org/articles/raspberry-PI/ten-things-raspberry-PI chapter 10.
This video View on YouTube → shows how to clone a SD card in Windows
-- WikiGuest - 1970-01-01
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---

%NEXT{"item"}%
-- WikiGuest - 1970-01-01

---

Linux tricks & tips

<div style="text-align:right"><a style="font-size:smaller" href="/edit/Epics/LinuxTricksTips">edit</a></div>

serial device settings - switch off every possible hidden manipulation feature

edit
$> stty -F /dev/ttySx -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 19200

• Output settings:

  -opost

  do not post-process output

  -onlcr

  do not translate newline to carriage return-newline

• Local settings:

  -isig

  do not enable interrupt, quit, and suspend special characters

  -icanon

  do not enable erase, kill, werase, and rprnt special characters

  -iexten

  do not enable non-POSIX special characters

  -echo

  do not echo input characters

  -echoe

  do not echo erase characters as backspace-space-backspace

  -echok

  do not echo a newline after a kill character

  -echoctl

  do not echo control characters in hat notation ('^c')

  -echoke

  kill all line by obeying the echoctl and echok setting

  19200

  sets the speed to 19200 Bit/s

Summarizing the settings prevent any additional manipulation of input or output.

-- PeterZumbruch - 2020-11-09
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---

usbdev - dynamic device symlink and proper access rights

udev/udevadm allows to automatically assign (fixed) symbolic links for USB devices connected to the system pointing the current /dev entry point.
edit

Prerequisites

you have to have admin rights.

How to

• edit/create /etc/udev/rules.d/99-serial-permissions.rules
  
  • add the follwing line for general includes
    SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", SYMLINK+="$env{ID_SERIAL}", GROUP="users", MODE="0666"
    creates for every connected device of vendor id 0403 a symbolic link /dev/ to the connected device
    
  • for special devices those lines can be added in addition
    SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ENV{ID_SERIAL}=="FTDI_FT232R_USB_UART_A100dQ2B", SYMLINK+="hadcon2", GROUP="users", MODE="0666"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ENV{ID_SERIAL}=="FTDI_FT232R_USB_UART_A600801P", SYMLINK+="olimex", GROUP="users", MODE="0666"
    
  • for special devices (e.g. HadCon2) those lines can be added in addition
    • SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ENV{ID_SERIAL}=="FTDI_FT232R_USB_UART_A100*", RUN+="/usr/bin/stty -F /dev/$kernel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 115200 "
      
    • SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ENV{ID_SERIAL}=="FTDI_FT232R_USB_UART_A801*", RUN+="/usr/bin/stty -F /dev/$kernel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke 115200 "
      
• to find out the IDs of connected systems
  udevadm info --export-db| grep FTDI| grep ID_SERIAL
  
  
• Finally reload rules and trigger a reconnect:
  
  udevadm control --reload-rules
udevadm trigger

Links

"Writing udev rules"

http://reactivated.net/writing_udev_rules.html

udev

https://wiki.ubuntuusers.de/udev/

"Tutorial on how to write basic udev rules in Linux"

https://linuxconfig.org/tutorial-on-how-to-write-basic-udev-rules-in-linux

-- PeterZumbruch - 2019-03-22
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---

SSH config: Host Specific Identity

Using ssh config files in ~/.ssh/config allows to specify per host / host alias different user/identity to connect with and more necessary options.
edit
Using the features of the config file of ssh in ~/.ssh one can specify host specific ssh options, including varying identities and users.
from: http://www.gelato.unsw.edu.au/archives/git/0611/31044.html
Example:
• connecting to a specific host using a different identity file and user
  
  $> cat ~/.ssh/config

     Host private.host.com
        User myname
        Hostname host.com
        IdentityFile ~/.ssh/private-identity
     Host public.host.com
        User anotherName
        Hostname host.com
        IdentityFile ~/.ssh/public-identity
     Host git.host.com
        User git
        Hostname host.com
        IdentityFile ~/.ssh/git-identity
       

• allows to replace:
  • ssh host.com -l myname -i ~/.ssh/private-identity
    by
    ssh host.com
  • commands which internally use ssh but do not allow to pass ssh options, e.g. git
    git clone git.host.com
-- PeterZumbruch - 2020-11-09
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---

Linux: dhclient - dynamic hostname

Using dhclient exit hooks scripts allows to set e.g. the hostname dynamically
edit
Based on the articles:
• Setting the System Hostname from DHCP in Ubuntu 11.10
and its own origin
• Automatic/Dynamic configuration of hostnames for rolling out labs
dhclient and its scripting capabilities on enter and exit hooks allows to react on dynamic network environments.
Provided you have root privileges this can be achieved by creating a script file hostname created in /etc/dhcp/dhclient-exit-hooks.d/ (on Debian), which is sourced by dhclient after having updated/received its DHCP informations.

#!/bin/sh
   # Filename:     /etc/dhcp/dhclient-exit-hooks.d/hostname
   # Purpose:      Used by dhclient-script to set the hostname of the system
   #               to match the DNS information for the host as provided by
   #               DHCP.
   #
      
   # Do not update hostname for virtual machine IP assignments
   if [ "$interface" != "eth0" ] && [ "$interface" != "eth1" ] && [ "$interface" != "wlan0" ]
   then
           return
   fi
      
   if [ "$reason" != BOUND ] && [ "$reason" != RENEW ] && [ "$reason" != REBIND ] && [ "$reason" != REBOOT ]
   then
      return
   fi
   
   echo dhclient-exit-hooks.d/hostname: Dynamic IP address = $new_ip_address
   hostname=$(a=$(host $new_ip_address) || { false; } && { echo -n $a | cut -d ' ' -f 5 | cut -d "." -f 1; true; }) || unset hostname &&
   echo ${hostname?} > /etc/hostname &&
   hostname $hostname &&
   export HOSTNAME=$hostname &&
   echo dhclient-exit-hooks.d/hostname: Dynamic Hostname = $hostname

Applying those code lines: %FOREACH{"file" in="/etc/dhcp/dhclient-exit-hooks.d/hostname"}%

sudo curl -s https://wiki.gsi.de/pub/Epics/TipsLinuxDhclientDynamicHostname/_etc_dhcp_dhclient-exit-hooks.d_hostname -o $file && 
  sudo dos2unix $file && 
  sudo chmod a+r $file

%NEXT{"file"}%
Local testing at the prompt:
dhclient
-- PeterZumbruch - 2018-11-30
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---

Linux: dhclient - dynamic mount point

Using dhclient exit hooks scripts allows to set a mount point depending on the network environment, in this example for the HADES setup
edit
Based on the articles:
• Setting the System Hostname from DHCP in Ubuntu 11.10
and its own origin
• Automatic/Dynamic configuration of hostnames for rolling out labs
dhclient and its scripting capabilities on enter and exit hooks allows to react on dynamic network environments.
Provided you have root privileges this can be achieved by creating a script file mount_var_diskless created in /etc/dhcp/dhclient-exit-hooks.d/ (on Debian), which is sourced by dhclient after having updated/received its DHCP informations.

#!/bin/sh
    # Filename:     /etc/dhcp/dhclient-exit-hooks.d/mount_var_diskless
    # Purpose:      Used by dhclient-script to set mount HADES's var/diskless filesystem 
    #               from either the local net (preferred) or the GSI network
    #
    
    # Do not update hostname for virtual machine IP assignments
    if [ "$interface" != "eth0" ] && [ "$interface" != "eth1" ] && [ "$interface" != "wlan0" ]
    then
        return
    fi
    
    if [ "$reason" != BOUND ] && [ "$reason" != RENEW ] && [ "$reason" != REBIND ] && [ "$reason" != REBOOT ]
    then
            return
    fi
    
    var_diskless_hades=192.168.100.50
    var_diskless_gsi=140.181.75.158 
    var_diskless_path=/var/diskless/dreamplug
    var_diskless_mount=/var/diskless/dreamplug
    
    echo dhclient-exit-hooks.d/mount_var_diskless: new domain-name-servers: $new_domain_name_servers 
    
    echo "$new_domain_name_servers" | grep -q $var_diskless_hades && var_diskless_addr=$var_diskless_hades || var_diskless_addr=$var_diskless_gsi
    
    #clean up, but only different mounts
    grep -v "$var_diskless_addr:$var_diskless_path" /etc/mtab | grep -q "$var_diskless_mount" && umount $var_diskless_mount 
    
    #mount
    [ -d "$var_diskless_mount" ] || mkdir -p $var_diskless_mount
    grep "$var_diskless_addr:$var_diskless_path" /etc/mtab | grep -q "$var_diskless_mount" || mount $var_diskless_addr:$var_diskless_path $var_diskless_mount
    
    echo dhclient-exit-hooks.d/mount_var_diskless: mounted $var_diskless_addr:$var_diskless_path
    
    unset var_diskless_hades 
    unset var_diskless_gsi 
    unset var_diskless_path 
    unset var_diskless_mount
    

Finally make sure the file is readable:
chmod a+r /etc/dhcp/dhclient-exit-hooks.d/mount_var_diskless
Local testing at the prompt:
dhclient -v
-- PeterZumbruch - 2020-11-09
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---

%FOREACH{"item" in="TipsLinuxHadesNetworkAllowClientToConnectViaGateway"}%

Linux: Hades Network - Allow Client To Connect Via Gateway

edit
To allow clients to connect outside of Hades network:
• with root privileges
ip r a default via 192.168.100.90 dev eth0
-- WikiGuest - 1970-01-01
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%NEXT{"item"}%
%FOREACH{"item" in="TipsLinuxHowToCloneASDCard"}%

Linux: How To Clone A SD Card

edit
Following the help of page https://startingelectronics.org/articles/raspberry-PI/ten-things-raspberry-PI chapter 10.
This video View on YouTube → shows how to clone an SD card in Linux using the dd command line application.
The command for copying an SD card to an image file on your computer is:
sudo dd if=/dev/mmcblk0 of=~/raspi.img
The command for copying an SD card image to a new SD card is:
sudo dd if=~/raspi.img of=/dev/mmcblk0
Where:
• ~/raspi.img is the location and file name of the image file.
• /dev/mmcblk0 is the SD card device on the Linux system.
-- WikiGuest - 1970-01-01
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%NEXT{"item"}%
%FOREACH{"item" in="TippsLinuxResizeRawImgFile"}%

Linux: Resize Raw Img File

edit
see: http://www.vk3erw.com/index.php/16-software/33-raspberry-pi-how-to-resize-sd-card-image
-- WikiGuest - 1970-01-01
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%NEXT{"item"}%
%FOREACH{"item" in="TippsLinuxRebootingTheMagicWay"}%

/sbin/reboot: Input/output error

edit
• http://www.linuxjournal.com/content/rebooting-magic-way
• http://www.buha.info/showthread.php?56521-sbin-reboot-Input-output-error

-- WikiGuest - 1970-01-01
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---

%NEXT{"item"}%
%FOREACH{"item" in="TippsLinuxProcServRemoteKillViaNetcat"}%

ProcServ: Remote Kill Via netcat

ProcServ usually needs a login to its port to execute a "CTRL+X" sequence to kill/restart the current child process. Thanks to this cmdline it is also able without. Thanks to J.Michel / M.Traxler, afaik.
edit

Solution

Assuming that procServ is running its telnet session on port 12345 on localhost

echo -en "\x18" | netcat -w1 localhost 12345;

-- WikiGuest - 1970-01-01
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-- WikiGuest - 1970-01-01

---

Hardware collection, evaluation

Introduction

The idea is to collect recommended hardware tools in use and experiences

serial ComPorts/ComServer - LAN ⇔ RS232

EXSYS

Experience and Users

• 6030 used by Wuppertal group of CBM as alternative to WuT
  • up-to-now good experiences
  • less expensive than WuT

Documentation

• EXSYS EX-6030 1 channel
  • EX-6030, Manual
    • local: E700_EXSYS_EX_6030_DB_MULTI.pdf: EXSYS_EX6030, 1 channel, data sheet
  • EX-6030, data sheet
    • local: E700_EXSYS_EX-6030_HB_DEU.pdf: EXSYS_EX6030, 1 channel, manual
• EXSYS EX-6034, 4 channel
  • EX-6034, Manual
    • local: E700_EXSYS_EX6034_DB_MULTI.pdf: EXSYS_EX6034, 4 channel, data sheet
  • EX-6034, data sheet
    • local: E700_EXSYS_EX6034_HB_DEU.pdf: EXSYS_EX6034, 4 channel, manual

W&T, WuT, Wiesemann & Theis

Experience and Users

• Used by HADES, EE/KS, CBM
• Observations
  • - in connection with network settings, sometimes quiet stubborn → clumsy hardware reset necessary
  • - CBM @ COSY: showed in a radioactive environment (cave), (network) connection problems, 1 out of 3 ports operational
  • + good remote programming capabilities
  • + internal buffer, might overcome latencies

Documentation

• WuT serial Com-Servers

-- PeterZumbruch - 2012-11-07

---

Git Tips & Tricks

<div style="text-align:right"><a style="font-size:smaller" href="/edit/Epics/GitTricksTips">edit</a></div>

Importing cvs into git, including history

How to "Import a CVS repository into a bare git repository"

• with the help of
  • http://linux.die.net/man/1/git-cvsimport
  • http://git-scm.com/book/en/v2/Git-and-Other-Systems-Migrating-to-Git
    • german: http://git-scm.com/book/de/v1/Git-und-andere-Versionsverwaltungen-Zu-Git-umziehen
  • https://docs.moodle.org/dev/Importing_Moodle_CVS_history_into_git
<div style="text-align:right"><a style="font-size:smaller" href="/edit/Epics/GitTricksTipsImportCvsIntoGitIncludingHistory">edit</a></div>
# External CVSROOT, e.g. scs@lx-pool.gsi.de:/misc/hadesprojects/slowcontrol/cvsroot/
URL_CVSROOT_EXTERNAL=<[User@]external CVSROOT directory>,
CVSROOT_LOCAL=<local CVSROOT directory>
# Git repository path: e.g. "hadesprojects-slowcontrol.git"
GIT_TARGET_DIR=<New Git Repository>,
# CVS Module to import MODULE=<CVS Module to extract>


[ ! -z "$CVSROOT_LOCAL" ] mkdir -p "$CVSROOT_LOCAL" &&
[ ! -z "$URL_CVSROOT_EXTERNAL" ] && rsync --progress -a "$URL_CVSROOT_EXTERNAL/" $CVSROOT_LOCAL
[ ! -z "$GIT_TARGET_DIR" ] && GIT_TARGET_REPOSITORY=${GIT_TARGET_DIR%%.git}.git && mkdir -p $GIT_TARGET_REPOSITORY &&
cd $GIT_TARGET_REPOSITORY &&
git init --bare &&
[ ! -z "$MODULE" ] && time git cvsimport -i -o cvshead -p xv -v -k -d $CVSROOT_LOCAL -C $GIT_TARGET_REPOSITORY $MODULE >&/tmp/cvsimport.log ||
echo "import of module \'$MODULE\' of CVS repository \'$URL_CVSROOT_EXTERNAL\' into \'$GIT_TARGET_REPOSITORY\' failed"
-- PeterZumbruch - 2014-11-03
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Submodule

git submodule
, illustrated in a few command line examples.
These examples require at least version 1.7.
<div style="text-align:right"><a style="font-size:smaller" href="/edit/Epics/GitTricksTipsSubmodule">edit</a></div>

adding a submodule to a git directory

• git submodule add
• git submodule
• git submodule init

retrieving a repository with submodules

• git clone
• git submodule update

converting a repository into projects with submodules

(H.Brand)
• create new branch
• go into sub directory
• git init
• create remote bare repository
• push to (final) remote repository
• delete local sub directory and
• replace by add submodule pointing to remote,
• commit
• checkout and test
• merge new branch into current "master"
-- PeterZumbruch - 2014-11-03
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Git Workflow

<div style="text-align:right"><a style="font-size:smaller" href="/edit/Epics/GitTricksTipsWorkflow">edit</a></div>

Possible Git Workflow

• inspired by https://github.com/HB-GSI/CSPP/wiki
  • which itself is inspired by the FAIRRoot WorkFlow This shows the following Workflow Diagram

(https://raw.githubusercontent.com/AnarManafov/GitWorkflow/master/GitWorkflow_fig1.png)




-- PeterZumbruch - 2014-11-14
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-- PeterZumbruch - 2014-11-14

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-- PeterZumbruch - 11 Jun 2015