Generate XDS.INP: Difference between revisions

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(→‎The script: add 2theta printout to MarCCD - this works for VL's data)
(→‎The script: rev 1.02)
(14 intermediate revisions by the same user not shown)
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# revision 0.92 . KD 27/02/2020 read *_master.h5 from Diamond Light Source
# revision 0.92 . KD 27/02/2020 read *_master.h5 from Diamond Light Source
# revision 0.93 . KD 13/03/2020 print out 2theta for MarCCD (DETECTOR_*_AXIS can be derived from this)
# revision 0.93 . KD 13/03/2020 print out 2theta for MarCCD (DETECTOR_*_AXIS can be derived from this)
REVISION="0.93 (12-Mar-2020)"
# revision 0.94 . KD 16/03/2020 bugfix for Bruker-cbf to make bc accept e.g. 3.1e-005 by using awk printf "%.5f" instead of awk print
# revision 0.95 . KD 29/07/2020 fix DLS Eiger HDF5 variant OSCILLATION_RANGE, STARTING_ANGLE. Attention: DLS Eiger variant needs h5dump 1.10 for OVERLOAD!
# revision 0.96 . KD 03/10/2020 make script echo detector serial number if inverted ROTATION_AXIS is detected.
# revision 0.97 . KD 19/10/2020 add UNTRUSTED_RECTANGLEs for Eiger2 (which has a few pixels less than Eiger (thanks to Andreas Förster)
# revision 0.98 . Thomas Hauß (HZB) 06/11/2020 switch Python print syntax to Python3
# revision 0.99 . Aaron Finke (CHESS) 07/11/2020 add ROTATION_AXIS=-1 0 0 for EIGER2 16M detector at MX beamline ID7B2 (CHESS)
# revision 1.00 . Gleb Bourenkov 10/11/2020 add ROTATION_AXIS=0 -1 0 for beamline P14 (EMBL Hamburg) detectors Eiger 16M S/N E-32-0107; previously Eiger 4M S/N E-08-0107 and PILATUS 6M-F, S/N 60-0115-F
# revision 1.01 . KD 07/12/2020 ROTATION_AXIS=0 -1 0 for Pilatus3 2M, S/N 24-0118 at ID23-2 (http://www.globalphasing.com/autoproc/wiki/index.cgi?BeamlineSettings)
# revision 1.02 . KD 11/01/2021 recognize mar555 detector as mar345 (thanks to Thomas Hauß, HZB)
REVISION="1.02 (11-Jan-2021)"


#                                                                                                             
#                                                                                                             
Line 234: Line 243:
  grep -q "^SOURCE_WAVELENGTH= *1" tmp2 && DET=dtrek
  grep -q "^SOURCE_WAVELENGTH= *1" tmp2 && DET=dtrek
  grep -q BEAM_CENTER_X tmp2      && DET=adsc                                 
  grep -q BEAM_CENTER_X tmp2      && DET=adsc                                 
  grep -q mar345 tmp2 && DET=MAR345    
  grep -q mar345 tmp2 && DET=MAR345
# rev. 1.02: in one case, mar555 data could be processed pretending it is mar345, so:
grep -q mar555 tmp2 && DET=MAR345
  grep -q BRUKER tmp2 && grep -q CBF tmp2  && DET=Bruker-cbf   
  grep -q BRUKER tmp2 && grep -q CBF tmp2  && DET=Bruker-cbf   
  grep -q CMOS1 tmp2 && DET=adsc-CMOS1   
  grep -q CMOS1 tmp2 && DET=adsc-CMOS1   
Line 275: Line 286:
   if echo "${DET_SN}${REVERSEPHI_SNs}" | sort | uniq -d | grep [0-9] > /dev/null; then
   if echo "${DET_SN}${REVERSEPHI_SNs}" | sort | uniq -d | grep [0-9] > /dev/null; then
     REVERSE_PHI="yes"
     REVERSE_PHI="yes"
    echo inverted ROTATION_AXIS since Detector Serial Number is "${DET_SN}"
   fi
   fi


Line 433: Line 445:
       if echo "${DET_SN}${REVERSEPHI_SNs}" | sort | uniq -d | grep [0-9] > /dev/null; then
       if echo "${DET_SN}${REVERSEPHI_SNs}" | sort | uniq -d | grep [0-9] > /dev/null; then
         REVERSE_PHI="yes"
         REVERSE_PHI="yes"
        echo inverted ROTATION_AXIS since detector serial number is ${DET_SN}
       fi
       fi


Line 509: Line 522:
       if echo "${DET_SN}${REVERSEPHI_SNs}" | sort | uniq -d | grep [0-9] > /dev/null; then
       if echo "${DET_SN}${REVERSEPHI_SNs}" | sort | uniq -d | grep [0-9] > /dev/null; then
         REVERSE_PHI="yes"
         REVERSE_PHI="yes"
        echo inverted ROTATION_AXIS since detector serial number is ${DET_SN}
       fi
       fi
       if [ "$DET_SN" == "PILATUS XXX, S/N XX-XXX" ] ; then
       if [ "$DET_SN" == "PILATUS XXX, S/N XX-XXX" ] ; then
Line 519: Line 533:
         if grep -q "Oscillation_axis X.CW +SLOW" tmp2 ; then
         if grep -q "Oscillation_axis X.CW +SLOW" tmp2 ; then
           rotation_axis="0 -1 0"
           rotation_axis="0 -1 0"
          echo ROTATION_AXIS="0 -1 0" at Diamond I24
         fi
         fi
       fi
       fi
# insert similar code for Petra P14 here
# PETRA P14: raw data from Eiger are stored as CBF files so this is treated as Pilatus
      if [ "$DET_SN" == "Dectris Eiger 16M, E-32-0107" -o "$DET_SN" == "Dectris Eiger 4M, E-08-0107" -o "$DET_SN" == "PILATUS 6M-F, S/N 60-0115-F" ] ; then
        rotation_axis="0 -1 0"
        echo ROTATION_AXIS="0 -1 0" at PETRA P14
      fi
# ESRF ID23-2:
      if [ "$DET_SN" == "PILATUS3 2M, S/N 24-0118, ESRF ID23" ] ; then
        rotation_axis="0 -1 0"
        echo ROTATION_AXIS="0 -1 0" at ESRF ID23-2
      fi


elif [ "$DET" == "eiger" ]; then
elif [ "$DET" == "eiger" ]; then
Line 529: Line 553:
   if [ "$DLS" == 1 ]; then
   if [ "$DLS" == 1 ]; then
     echo Eiger HDF5 from Diamond
     echo Eiger HDF5 from Diamond
# unfortunately h5dump 1.10 is required to get this right for the DLS .h5 files. This version is available at DLS but maybe not elsewhere
     OVERLOAD=`h5dump -d "/entry/instrument/detector/saturation_value" $FIRSTFRAME | awk '/\(0\):/{print $2}'`
     OVERLOAD=`h5dump -d "/entry/instrument/detector/saturation_value" $FIRSTFRAME | awk '/\(0\):/{print $2}'`
     OSCILLATION_RANGE=`h5dump -d "/entry/data/omega" $FIRSTFRAME | awk '/\(0\): [0-9]/{print $3-$2}'`
  # v0.95: fix the next 2 lines by taking care of negative values with the \- , and stop after first "(0)"
     STARTING_ANGLE=`h5dump    -d "/entry/data/omega" $FIRSTFRAME | awk '/\(0\): [0-9]/{print $2}' | sed -e "s/,//"`
     OSCILLATION_RANGE=`h5dump -d "/entry/data/omega" $FIRSTFRAME | awk '/\(0\): [\-0-9]/{print $3-$2;exit}'`
     STARTING_ANGLE=`h5dump    -d "/entry/data/omega" $FIRSTFRAME | awk '/\(0\): [\-0-9]/{print $2;exit}' | sed -e "s/,//"`
     echo OSCILLATION_RANGE=$OSCILLATION_RANGE STARTING_ANGLE=$STARTING_ANGLE
     echo OSCILLATION_RANGE=$OSCILLATION_RANGE STARTING_ANGLE=$STARTING_ANGLE
   # rotation_axis=`h5dump -a "/entry/sample/transformations/omega/vector" $FIRSTFRAME 2>/dev/null | grep "(0):" | sed -e "s/^.*://; s/,//g"`
   # rotation_axis=`h5dump -a "/entry/sample/transformations/omega/vector" $FIRSTFRAME 2>/dev/null | grep "(0):" | sed -e "s/^.*://; s/,//g"`
Line 543: Line 569:
   # If rotation vector set (NeXus)
   # If rotation vector set (NeXus)
     rotation_axis=`h5dump -a "/entry/sample/transformations/omega/vector" $FIRSTFRAME 2>/dev/null | grep "(0):" | sed -e "s/^.*://; s/,//g"`
     rotation_axis=`h5dump -a "/entry/sample/transformations/omega/vector" $FIRSTFRAME 2>/dev/null | grep "(0):" | sed -e "s/^.*://; s/,//g"`
   # Eiger 16M SSRF BL17U1  
   # Eiger 16M SSRF BL17U1 has S/N E-32-0111;  EIGER2 16M CHESS ID7B2 has S/N E-32-0123 (A. Finke 2020-11-07) v0.99
     SN=`h5dump -d "/entry/instrument/detector/detector_number" $FIRSTFRAME | awk '/\(0\): /{print $2}' | sed s/\"//g`
     SN=`h5dump -d "/entry/instrument/detector/detector_number" $FIRSTFRAME | awk '/\(0\): /{print $2}' | sed s/\"//g`
     if [ "$SN" == "E-32-0111" ]; then
     if [ "$SN" == "E-32-0111" ] || [ "$SN" == "E-32-0123" ]; then
       rotation_axis="-1 0 0"
       rotation_axis="-1 0 0"
       echo SSRF BL17U1 with inverted rotation axis
       echo SSRF BL17U1 or CHESS ID7B2 with inverted rotation axis
     fi  
     fi  
   fi
   fi
Line 577: Line 603:
   #let SKIP=768
   #let SKIP=768
   #NX=$(od -t x -j $SKIP -N 4 $FIRSTFRAME |awk 'NR==1{print toupper($2)}'|perl -nle '@array= $_ =~/.{2}/g; print "ibase=16;obase=A;".join("",reverse @array)'|bc)
   #NX=$(od -t x -j $SKIP -N 4 $FIRSTFRAME |awk 'NR==1{print toupper($2)}'|perl -nle '@array= $_ =~/.{2}/g; print "ibase=16;obase=A;".join("",reverse @array)'|bc)
   NX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(768);print "%.4d"%struct.unpack(">i",f.read(4))')
!  NX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(768);print "%.4d"%struct.unpack(">i",f.read(4))')
   NY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(772);print "%.4d"%struct.unpack(">i",f.read(4))')
!  NY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(772);print "%.4d"%struct.unpack(">i",f.read(4))')
   NX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(768);print("%.4d"%struct.unpack(">i",f.read(4)))')
   NY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(772);print("%.4d"%struct.unpack(">i",f.read(4)))')


   DETECTOR_DISTANCE=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(344);print "-%.4f"%struct.unpack(">f",f.read(4))')
!  DETECTOR_DISTANCE=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(344);print "-%.4f"%struct.unpack(">f",f.read(4))')
   DETECTOR_DISTANCE=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(344);print("-%.4f"%struct.unpack(">f",f.read(4)))')


   ORGX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(540);print "%.4f"%struct.unpack(">f",f.read(4))')
!  ORGX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(540);print "%.4f"%struct.unpack(">f",f.read(4))')
   ORGY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(544);print "%.4f"%struct.unpack(">f",f.read(4))')
!  ORGY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(544);print "%.4f"%struct.unpack(">f",f.read(4))')
   ORGX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(540);print("%.4f"%struct.unpack(">f",f.read(4)))')
   ORGY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(544);print("%.4f"%struct.unpack(">f",f.read(4)))')


   OSCILLATION_RANGE=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(524);phis,phie=struct.unpack(">ff",f.read(8));print "%.4f"%(phie-phis)')
!  OSCILLATION_RANGE=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(524);phis,phie=struct.unpack(">ff",f.read(8));print "%.4f"%(phie-phis)')
   OSCILLATION_RANGE=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(524);phis,phie=struct.unpack(">ff",f.read(8));print("%.4f"%(phie-phis))')


   QX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(776);print "%.6f"%struct.unpack(">f",f.read(4))')
!  QX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(776);print "%.6f"%struct.unpack(">f",f.read(4))')
   QY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(780);print "%.6f"%struct.unpack(">f",f.read(4))')
!  QY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(780);print "%.6f"%struct.unpack(">f",f.read(4))')
   QX=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(776);print("%.6f"%struct.unpack(">f",f.read(4)))')
   QY=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(780);print("%.6f"%struct.unpack(">f",f.read(4)))')


   X_RAY_WAVELENGTH=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(292);print "%.6f"%struct.unpack(">f",f.read(4))')
!  X_RAY_WAVELENGTH=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(292);print "%.6f"%struct.unpack(">f",f.read(4))')
   X_RAY_WAVELENGTH=$(python -c 'import struct; f=open("'$FIRSTFRAME'","rb");f.seek(292);print("%.6f"%struct.unpack(">f",f.read(4)))')


elif [ "$DET" == "dtrek" ]; then
elif [ "$DET" == "dtrek" ]; then
Line 685: Line 720:
  DETECTOR="MAR345  MINIMUM_VALID_PIXEL_VALUE=0  OVERLOAD=130000"
  DETECTOR="MAR345  MINIMUM_VALID_PIXEL_VALUE=0  OVERLOAD=130000"
  NX=`awk '/FORMAT/{print $2}' tmp2`
  NX=`awk '/FORMAT/{print $2}' tmp2`
  NY=$NX
# next line is rev 1.02 (previously NY= $NX):
  NY=`awk -v NX=$NX '/FORMAT/{print $4/NX}' tmp2`
  QX=`awk '/PIXEL/{print $3/1000.}' tmp2`
  QX=`awk '/PIXEL/{print $3/1000.}' tmp2`
  QY=`awk '/PIXEL/{print $5/1000.}' tmp2`
  QY=`awk '/PIXEL/{print $5/1000.}' tmp2`
Line 747: Line 783:


  X_RAY_WAVELENGTH=`awk '/diffrn_radiation_wavelength.wavelength/{print $2}' tmp2`  
  X_RAY_WAVELENGTH=`awk '/diffrn_radiation_wavelength.wavelength/{print $2}' tmp2`  
  OMEGA=`awk '/OMEGA \? \? \?/{print $5}' tmp2`
# fix 16.3.20: instead of print, use printf "%.5f", because bc does not accept e.g. 3.1e-005
  DELTAOMEGA=`awk '/OMEGA \? \? \?/{print $6}' tmp2`
  OMEGA=`awk '/OMEGA \? \? \?/{printf "%.5f",$5}' tmp2`
  PHI=`awk '/PHI \? \? \?/{print $5}' tmp2`
  DELTAOMEGA=`awk '/OMEGA \? \? \?/{printf "%.5f",$6}' tmp2`
  DELTAPHI=`awk '/PHI \? \? \?/{printf "%5.4f",$6}' tmp2`
  PHI=`awk '/PHI \? \? \?/{printf "%.5f",$5}' tmp2`
  KAPPA=`awk '/CHI \? \? \?/{print $5}' tmp2`
  DELTAPHI=`awk '/PHI \? \? \?/{printf "%.5f",$6}' tmp2`
  KAPPA=`awk '/CHI \? \? \?/{printf "%.5f",$5}' tmp2`
# echo OMEGA DELTAOMEGA PHI DELTAPHI KAPPA= $OMEGA $DELTAOMEGA $PHI $DELTAPHI $KAPPA
# echo OMEGA DELTAOMEGA PHI DELTAPHI KAPPA= $OMEGA $DELTAOMEGA $PHI $DELTAPHI $KAPPA


Line 931: Line 968:
!                                                  and does not seem to have any downsides.  
!                                                  and does not seem to have any downsides.  
eof
eof
   if [ $NX == "1475" ]; then
   if [ $NX == "1028"  -a $NY == "1062" ]; then
# Eiger2 1M ; v0.97 numbers from Andreas Förster
    cat >> XDS.INP << eof
UNTRUSTED_RECTANGLE=    0 1029    512  551
eof
  elif [ $NX == "1475" ]; then
     if ! grep -q Flat_field tmp2 ; then
     if ! grep -q Flat_field tmp2 ; then
     cat >> XDS.INP << eof
     cat >> XDS.INP << eof
Line 964: Line 1,006:
eof
eof
     fi
     fi
  elif [ $NX == "2068"  -a $NY == "2162" ]; then
# Eiger2 4M ; v0.97 numbers from Andreas Förster
    cat >> XDS.INP << eof
!EXCLUSION OF VERTICAL DEAD AREAS OF THE EIGER2 4M DETECTOR
UNTRUSTED_RECTANGLE= 1028 1041      0 2163
!EXCLUSION OF HORIZONTAL DEAD AREAS OF THE EIGER 4M DETECTOR
UNTRUSTED_RECTANGLE=    0 2069    512  551
UNTRUSTED_RECTANGLE=    0 2069  1062 1101
UNTRUSTED_RECTANGLE=    0 2069  1612 1651
eof
   elif [ $NX == "2463" ]; then
   elif [ $NX == "2463" ]; then
# Pilatus 6M
# Pilatus 6M
Line 997: Line 1,049:
UNTRUSTED_RECTANGLE= 0 3110 2717 2757
UNTRUSTED_RECTANGLE= 0 3110 2717 2757
eof
eof
   elif [ $NX == "4150" -a $NY == "4371" ]; then
  elif [ $NX == "3108"  -a $NY == "3262" ]; then
# Eiger2 9M ; v0.97 numbers from Andreas Förster
    cat >> XDS.INP << eof
!EXCLUSION OF VERTICAL DEAD AREAS OF THE EIGER2 9M DETECTOR
UNTRUSTED_RECTANGLE= 1028 1041      0 3262
UNTRUSTED_RECTANGLE= 2068 2081      0 3263
!EXCLUSION OF HORIZONTAL DEAD AREAS OF THE EIGER2 9M DETECTOR
UNTRUSTED_RECTANGLE=    0 3109    512  551
UNTRUSTED_RECTANGLE=    0 3109  1062 1101
UNTRUSTED_RECTANGLE=    0 3109  1612 1651
UNTRUSTED_RECTANGLE=    0 3109  2162 2201
UNTRUSTED_RECTANGLE=    0 3109  2712 2751
eof
   elif [ $NX == "4150" -a $NY == "4371" ]; then
# Eiger 16M
# Eiger 16M
     cat >> XDS.INP << eof
     cat >> XDS.INP << eof
Line 1,012: Line 1,077:
  UNTRUSTED_RECTANGLE= 2069 2082      0 4371  
  UNTRUSTED_RECTANGLE= 2069 2082      0 4371  
  UNTRUSTED_RECTANGLE= 3109 3122      0 4371
  UNTRUSTED_RECTANGLE= 3109 3122      0 4371
eof
  elif [ $NX == "4148" -a $NY == "4362" ]; then
# Eiger2 16M ; v0.97 numbers from Andreas Förster
    cat >> XDS.INP << eof
!EXCLUSION OF HORIZONTAL DEAD AREAS OF THE EIGER2 16M DETECTOR
UNTRUSTED_RECTANGLE= 1028 1041      0 4363
UNTRUSTED_RECTANGLE= 2068 2081      0 4363
UNTRUSTED_RECTANGLE= 3108 3121      0 4363
!EXCLUSION OF VERTICAL DEAD AREAS OF THE EIGER2 16M DETECTOR
UNTRUSTED_RECTANGLE=    0 4149    512  551
UNTRUSTED_RECTANGLE=    0 4149  1062 1101
UNTRUSTED_RECTANGLE=    0 4149  1612 1651
UNTRUSTED_RECTANGLE=    0 4149  2162 2201
UNTRUSTED_RECTANGLE=    0 4149  2712 2751
UNTRUSTED_RECTANGLE=    0 4149  3262 3301
UNTRUSTED_RECTANGLE=    0 4149  3812 3851
eof
eof
   fi
   fi
Line 1,034: Line 1,115:


See also [[Generate_XDS.INP#Dependencies]] below, and the [[Installation]] article.
See also [[Generate_XDS.INP#Dependencies]] below, and the [[Installation]] article.
== Copying generate_XDS.INP from XDSwiki webserver ==
On Linux:
wget https://strucbio.biologie.uni-konstanz.de/pub/linux_bin/generate_XDS.INP
chmod a+x generate_XDS.INP
On Mac:
curl -o generate_XDS.INP https://strucbio.biologie.uni-konstanz.de/pub/linux_bin/generate_XDS.INP
chmod a+x generate_XDS.INP
See also [[Installation]].


== Obtaining generate_XDS.INP from this webpage ==
== Obtaining generate_XDS.INP from this webpage ==
Line 1,069: Line 1,159:
The script makes use of many GNU commands, like <code>ls, grep, egrep, awk, cut, cat, echo, wc, bc, head, sed, tail, cp, od, python</code>. Some of them (like <code>od</code> and <code>python</code>) are only used in case of specific detectors (MarCCD and RAXIS, respectively).  
The script makes use of many GNU commands, like <code>ls, grep, egrep, awk, cut, cat, echo, wc, bc, head, sed, tail, cp, od, python</code>. Some of them (like <code>od</code> and <code>python</code>) are only used in case of specific detectors (MarCCD and RAXIS, respectively).  
The script will only work if all the required commands are available. They reside in either the <code>coreutils</code> RPM, or specific RPMs (<code>gawk, sed, bc, grep, python</code> ...). Please note that to get the <code>strings</code> command on some Linux distributions (e.g. FC23) you need to install the <code>binutils</code> RPM package.
The script will only work if all the required commands are available. They reside in either the <code>coreutils</code> RPM, or specific RPMs (<code>gawk, sed, bc, grep, python</code> ...). Please note that to get the <code>strings</code> command on some Linux distributions (e.g. FC23) you need to install the <code>binutils</code> RPM package.
For Eiger data processing, the <code>h5dump</code> program must be installed. This is part of <code>hdf5-tools</code> (Ubuntu) or <code>hdf5</code> (RHEL).
For Eiger data processing, the <code>h5dump</code> program must be installed. This is part of <code>hdf5-tools</code> (Ubuntu) or <code>hdf5</code> (RHEL). The .h5 files collected at Diamond Light Source require a very new version of h5dump (namely h5dump 1.10) to extract the OVERLOAD parameter from the .h5 file; this version is available by default in Ubuntu 20.04 and RHEL/CentOS 8.


On Mac OS X, installation of the "Command Line Tools" (from http://developer.apple.com/downloads; requires Apple ID) is required (open a terminal and type <code>xcode-select --install</code>). These are also part of the (larger, but also free) [http://developer.apple.com/tools/xcode Xcode] package. This package comes with a license that has to be accepted by the user when running a Command Line Tool (e.g. <code>strings</code>) for the first time.
On Mac OS X, installation of the "Command Line Tools" (from http://developer.apple.com/downloads; requires Apple ID) is required (open a terminal and type <code>xcode-select --install</code>). These are also part of the (larger, but also free) [http://developer.apple.com/tools/xcode Xcode] package. This package comes with a license that has to be accepted by the user when running a Command Line Tool (e.g. <code>strings</code>) for the first time.
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