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annotate sources/toys/run-emulator.sh @ 568:856ba27e397b

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Actually make it give a PATH for distcc to find gcc with
author Mark Miller <mark@mirell.org>
date Mon, 05 Jan 2009 19:21:07 -0600
parents 7a820e5c8ca5
children 8e7db79a3d75
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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 else
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27 echo "unknown argument $1"
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28 echo 'Usage: run-emulator.sh [--make-hdb $MEGS] [--with-hdb $FILE] [$CROSS_COMPILER_PATH]' >&2
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29 exit 1
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30 fi
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32 shift
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33 done
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35 if [ ! -z "$DISTCC_PATH" ]
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36 then
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38 # Try to find a unique port number for each running instance of the program.
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40 # To reduce the chance of the port already being in use by another program,
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41 # we use a range either before or after that used by normal programs, but
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42 # beyond that allocated to most persistent demons. There's a small chance
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43 # even these ports are already in use, but this at least prevents
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44 # simultaneous run-emulator instances for different targets from
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45 # trivially interfering with each other.
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47 START=8192
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48 RANGE=$[$(awk '{print $1}' /proc/sys/net/ipv4/ip_local_port_range)-$START]
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49 if [ $RANGE -lt 1 ]
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50 then
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51 START=$[$(awk '{print $2}' /proc/sys/net/ipv4/ip_local_port_range)]
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52 RANGE=$[65535-$START]
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53 fi
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54 PORT=$[($$%$RANGE)+$START]
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56 # Run the distcc daemon on the host system with $PATH restricted to the
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57 # cross compiler binaries.
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58
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59 # Note that we tell it --no-detach and background it oursleves so jobs -p can
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60 # find it later to kill it after the emulator exits.
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61
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62 PATH="$(readlink -f "$DISTCC_PATH"/*-unknown-linux/bin)" "$DCC" --listen 127.0.0.1 \
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63 --no-detach --log-file distccd.log --log-level warning --daemon \
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64 -a 127.0.0.1 -p $PORT &
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65 # Cleanup afterwards: Kill child processes we started (I.E. distccd).
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66 trap "kill $(jobs -p)" EXIT
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68 # Prepare some environment variables for run-qemu.sh
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70 DISTCC_PATH_PREFIX=/tools/distcc:
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71 CPUS=$[$(echo /sys/devices/system/cpu/cpu[0-9]* | wc -w)*2]
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72 KERNEL_EXTRA="DISTCC_HOSTS=10.0.2.2:$PORT CPUS=$CPUS $KERNEL_EXTRA"
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73 fi
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75 # Should we set up an ext3 image as a second virtual hard drive for /home?
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77 # Default to image "hdb.img"
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78 [ -z "$HDB" ] && HDB="hdb.img"
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80 if [ ! -e "$HDB" ]
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81 then
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83 # If we don't already have an hdb image, should we set up a sparse file and
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84 # format it ext3?
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85
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86 if [ ! -z "$HDBMEGS" ]
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87 then
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88 dd if=/dev/zero of="$HDB" bs=1024 seek=$[$HDBMEGS*1024-1] count=1 &&
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89 mke2fs -b 1024 -F "$HDB" -i 4096 &&
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90 tune2fs -j -c 0 -i 0 "$HDB"
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91
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92 [ $? -ne 0 ] && exit 1
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93 fi
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94 fi
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95
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96 [ -e "$HDB" ] && WITH_HDB="-hdb $HDB"
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98 # The actual emulator invocation command gets appended here
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99