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annotate sources/toys/run-emulator.sh @ 939:abff74b958a1

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Once again add /sbin:/usr/sbin to $PATH when mke2fs isn't in $PATH.
author Rob Landley <rob@landley.net>
date Sun, 20 Dec 2009 00:32:17 -0600
parents 4bfe2b34dd9f
children fc134a13357e
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9d5fd8e1467b Merge run-*.sh so run-emulator.sh takes command line arguments. Rename emulator-build.sh to be more clear what it does.
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1 #!/bin/bash
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3 # The following environment variables affect the behavior of this script:
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4
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5 # HDB - Image file to use for -hdb on /home (none if blank)
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6 # HDBMEGS - Number of megabytes to create
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7 # HDC - Image file to use for -hdc on /mnt (none of blank)
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8 # QEMU_MEMORY - number of megabytes of memory for qemu (defaults to 128)
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10 # Also, to use the distcc accelerator you need to have distccd and $ARCH-cc
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11 # in the $PATH.
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12
4bfe2b34dd9f Largeish refactoring/simplification of run-emulator.sh and associated code. Now automatically sets up the distcc trick if the appropriate $ARCH-cc toolchain is in the $PATH (or the current directory).
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13 [ ! -z "$QEMU_MEMORY" ] && QEMU_EXTRA="-m $QEMU_MEMORY $QEMU_EXTRA"
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4bfe2b34dd9f Largeish refactoring/simplification of run-emulator.sh and associated code. Now automatically sets up the distcc trick if the appropriate $ARCH-cc toolchain is in the $PATH (or the current directory).
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15 # Should we set up an ext3 image as a second virtual hard drive for /home?
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17 if [ ! -z "$HDB" ]
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18 then
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19 if [ ! -e "$HDB" ]
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20 then
9d5fd8e1467b Merge run-*.sh so run-emulator.sh takes command line arguments. Rename emulator-build.sh to be more clear what it does.
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22 # If we don't already have an hdb image, should we set up a sparse file and
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23 # format it ext3?
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25 if [ ! -z "$HDBMEGS" ]
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26 then
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abff74b958a1 Once again add /sbin:/usr/sbin to $PATH when mke2fs isn't in $PATH.
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27 # Some distros don't put /sbin:/usr/sbin in the $PATH for non-root users.
abff74b958a1 Once again add /sbin:/usr/sbin to $PATH when mke2fs isn't in $PATH.
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28 [ -z "$(which mke2fs)" ] && export PATH=/sbin:/usr/bin:$PATH
abff74b958a1 Once again add /sbin:/usr/sbin to $PATH when mke2fs isn't in $PATH.
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30 dd if=/dev/zero of="$HDB" bs=1024 seek=$[$HDBMEGS*1024-1] count=1 &&
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31 mke2fs -b 1024 -F "$HDB" -i 4096 &&
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32 tune2fs -j -c 0 -i 0 "$HDB"
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33
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34 [ $? -ne 0 ] && exit 1
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35 fi
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36 fi
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37 WITH_HDB="-hdb $HDB"
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38 fi
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40 [ ! -z "$HDC" ] && [ -e "$HDC" ] && WITH_HDC="-hdc $HDC"
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42 # Start of distcc setup
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44 unique_port()
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45 {
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46 # Try to find a unique port number for each running instance of the program.
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48 # To reduce the chance of the port already being in use by another program,
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49 # we use a range either before or after that used by normal programs, but
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50 # beyond that allocated to most persistent demons. There's a small chance
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51 # even these ports are already in use, but this at least prevents
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52 # simultaneous run-emulator instances for different targets from
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53 # trivially interfering with each other.
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54
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55 START=8192
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56 RANGE=$[$(awk '{print $1}' /proc/sys/net/ipv4/ip_local_port_range)-$START]
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57 if [ $RANGE -lt 1 ]
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58 then
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59 START=$[$(awk '{print $2}' /proc/sys/net/ipv4/ip_local_port_range)]
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60 RANGE=$[65535-$START]
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61 fi
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62 echo $[($$%$RANGE)+$START]
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63 }
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64
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65 # The ARCH gets substituted in here by system-image.sh
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66
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67 ARCH=
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68
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69 # If the cross compiler isn't in the $PATH, look for it in the current
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70 # directory and the user's home directory.
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71
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72 DISTCC_PATH="$(which $ARCH-cc 2>/dev/null | sed 's@\(.*\)/.*@\1@')"
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73
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74 if [ -z "$DISTCC_PATH" ]
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75 then
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76 [ ! -f "cross-compiler-$ARCH/bin/$ARCH-cc" ] &&
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77 DISTCC_PATH="$(pwd)/cross-compiler-$ARCH/bin"
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78
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79 [ ! -f "$HOME/cross-compiler-$ARCH/bin/$ARCH-cc" ] &&
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80 DISTCC_PATH="$HOME/cross-compiler-$ARCH/bin"
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81 fi
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82
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83 if [ -z "$(which distccd)" ]
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84 then
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85 echo 'No distccd in $PATH, acceleration disabled.'
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86 elif [ -z "$DISTCC_PATH" ]
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87 then
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88 echo "No $ARCH-cc in "'$PATH'", acceleration disabled."
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89 else
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90
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91 # Populate a directory full of symlinks to the cross compiler using the
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92 # unprefixed names distccd will try to use.
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93
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94 mkdir -p "distcc_links" &&
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95 for i in $(cd "$DISTCC_PATH"; ls $ARCH-* | sed "s/^$ARCH-//" )
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96 do
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97 ln -sf "$DISTCC_PATH/$ARCH-$i" "distcc_links/$i"
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98 done
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99 if [ -e "$DISTCC_PATH/$ARCH-rawgcc" ]
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100 then
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101 for i in cc gcc g++ c++
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102 do
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103 ln -sf "$DISTCC_PATH/$ARCH-rawgcc" distcc_links/$i
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104 done
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105 fi
499
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106
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107 # Run the distcc daemon on the host system with $PATH restricted to the
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108 # cross compiler binaries.
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109
863
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110 # Note that we tell it --no-detach and background it ourselves so jobs -p can
499
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111 # find it later to kill it after the emulator exits.
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112
863
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113 PORT=$(unique_port)
613
518c8e257b3d Fixes Mark Miller sent for distcc support.
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114 CPUS=$[$(echo /sys/devices/system/cpu/cpu[0-9]* | wc -w)*2]
863
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115 PATH="$(pwd)/distcc_links" "$(which distccd)" --no-detach --daemon \
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116 --listen 127.0.0.1 -a 127.0.0.1 -p $PORT --jobs $CPUS \
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117 --log-stderr --verbose 2>distccd.log &
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118
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119 # Clean up afterwards: Kill child processes we started (I.E. distccd).
499
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120 trap "kill $(jobs -p)" EXIT
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121
835
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122 # When background processes die, they should do so silently.
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123 disown $(jobs -p)
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124
863
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125 # Let the QEMU launch know we're using distcc.
499
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126
790
188a182b1a7f Remove some leftover /tools residue.
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127 DISTCC_PATH_PREFIX=/usr/distcc:
614
d771a938c673 Mark points out that DISTCC_HOSTS needs /$CPUS at the end, otherwise it only distributes 4 jobs/host.
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128 KERNEL_EXTRA="DISTCC_HOSTS=10.0.2.2:$PORT/$CPUS CPUS=$CPUS $KERNEL_EXTRA"
499
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129 fi
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130
751
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131 # Kill our child processes on exit.
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132
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133 trap "pkill -P$$" EXIT
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134
863
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135 # The actual emulator invocation command gets appended here by system-image.sh
499
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136