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annotate sources/toys/run-emulator.sh @ 790:188a182b1a7f

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Remove some leftover /tools residue.
author Rob Landley <rob@landley.net>
date Mon, 06 Jul 2009 05:26:21 -0500
parents d0157468f73d
children f0b5901bca48
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1 #!/bin/bash
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3 # Parse command line arguments
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5 while [ ! -z "$1" ]
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6 do
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7 if [ "$1" == "--make-hdb" ]
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8 then
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9 shift
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10 HDBMEGS="$1"
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11 elif [ "$1" == "--with-hdb" ]
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12 then
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13 shift
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14 HDB="$1"
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15 elif [ "$1" == "--with-distcc" ]
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16 then
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17 DCC="$(which distccd)"
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18 if [ -z "$DCC" ]
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19 then
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20 echo 'No distccd in $PATH' >&2
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21 exit 1
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22 fi
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24 shift
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25 DISTCC_PATH="$1"
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26 elif [ "$1" == "--memory" ]
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27 then
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28 shift
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29 QEMU_EXTRA="-m $1 $QEMU_EXTRA"
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30 else
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31 (
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32 echo "unknown argument $1"
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33 echo 'Usage: run-emulator.sh [OPTIONS]'
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34 echo ' --make-hdb $MEGS - create a sparse image (if none exists) to mount on /home'
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35 echo ' --with-hdb $FILE - Use an image file name other than hdb.img'
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36 echo ' --with-distcc $DISTCC_PATH - set up distcc accelerator.'
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37 echo ' Argument is path to cross compiler.'
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38 echo ' --memory $MEGS - Tell emulator to use this many megabytes of memory.'
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39 echo ' Default is 128 megs for 32 bit targets, 256 megs for 64 bit.'
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40 ) >&2
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41 exit 1
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42 fi
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44 shift
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45 done
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47 if [ ! -z "$DISTCC_PATH" ]
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48 then
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50 # Try to find a unique port number for each running instance of the program.
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51
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52 # To reduce the chance of the port already being in use by another program,
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53 # we use a range either before or after that used by normal programs, but
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54 # beyond that allocated to most persistent demons. There's a small chance
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55 # even these ports are already in use, but this at least prevents
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56 # simultaneous run-emulator instances for different targets from
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57 # trivially interfering with each other.
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58
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59 START=8192
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60 RANGE=$[$(awk '{print $1}' /proc/sys/net/ipv4/ip_local_port_range)-$START]
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61 if [ $RANGE -lt 1 ]
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62 then
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63 START=$[$(awk '{print $2}' /proc/sys/net/ipv4/ip_local_port_range)]
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64 RANGE=$[65535-$START]
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65 fi
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66 PORT=$[($$%$RANGE)+$START]
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67
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68 # Run the distcc daemon on the host system with $PATH restricted to the
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69 # cross compiler binaries.
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71 # Note that we tell it --no-detach and background it oursleves so jobs -p can
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72 # find it later to kill it after the emulator exits.
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73
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74 CPUS=$[$(echo /sys/devices/system/cpu/cpu[0-9]* | wc -w)*2]
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75 PATH="$(readlink -f "$DISTCC_PATH"/tools/bin)" "$DCC" --listen 127.0.0.1 \
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76 --no-detach --log-file distccd.log --verbose --jobs ${CPUS} --daemon \
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77 -a 127.0.0.1 -p $PORT &
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78 # Cleanup afterwards: Kill child processes we started (I.E. distccd).
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79 trap "kill $(jobs -p)" EXIT
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81 # Prepare some environment variables for run-qemu.sh
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82
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83 DISTCC_PATH_PREFIX=/usr/distcc:
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d771a938c673 Mark points out that DISTCC_HOSTS needs /$CPUS at the end, otherwise it only distributes 4 jobs/host.
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84 KERNEL_EXTRA="DISTCC_HOSTS=10.0.2.2:$PORT/$CPUS CPUS=$CPUS $KERNEL_EXTRA"
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85 fi
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86
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87 # Should we set up an ext3 image as a second virtual hard drive for /home?
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88
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89 # Default to image "hdb.img"
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90 [ -z "$HDB" ] && HDB="hdb.img"
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91
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92 if [ ! -e "$HDB" ]
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93 then
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94
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95 # If we don't already have an hdb image, should we set up a sparse file and
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96 # format it ext3?
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97
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98 if [ ! -z "$HDBMEGS" ]
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99 then
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100 dd if=/dev/zero of="$HDB" bs=1024 seek=$[$HDBMEGS*1024-1] count=1 &&
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101 mke2fs -b 1024 -F "$HDB" -i 4096 &&
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102 tune2fs -j -c 0 -i 0 "$HDB"
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103
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104 [ $? -ne 0 ] && exit 1
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105 fi
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106 fi
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107
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108 [ -e "$HDB" ] && WITH_HDB="-hdb $HDB"
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109
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110 # Kill our child processes on exit.
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111
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112 trap "pkill -P$$" EXIT
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113
499
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114 # The actual emulator invocation command gets appended here
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115