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Linux-DTR-RTS-flaw: link to new fc-linux-patch repository
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 11 Dec 2023 19:02:01 +0000
parents 12424010d7b8
children
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1 FreeCalypso software install location
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2 =====================================
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3
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4 FreeCalypso queendom includes several software packages that are meant to be
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5 installed on the user's general-purpose Unix/Linux host computer such as a
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6 Linux PC or laptop. The principal component packages in this category are FC
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7 host tools (for operating on GSM MS devices), FC SIM tools (for operating on
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8 SIM cards) and FC USB-serial tools (for operating on FTDI and Silabs chips) -
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9 but these listed tool packages are not the only ones. All FC software packages
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10 that run on a general-purpose Unix/Linux host computer are meant to be installed
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11 in one specific file system location; the present article applies to all of
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12 these packages.
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13
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14 The install location for all FC host software packages is fixed as
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15 /opt/freecalypso - this install location is NOT changeable. The directory tree
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16 that exists under /opt/freecalypso is defined by the Mother of FreeCalypso in
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17 her sole authority, and it includes both FHS-style and non-FHS-style,
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18 FC-specific subdirectories. The following subdirectories are currently defined
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19 under /opt/freecalypso:
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20
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21 (FHS-style)
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22
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23 bin All Unix/Linux host binaries are installed here.
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24
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25 include Some FC host software components provide header files that are
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26 intended to be used by other (later in the dependency graph) FC
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27 host sw components. FC host tools rvinterf headers are
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28 installed here currently, used by fc-rfcal-tools.
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29
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30 lib Currently hypothetical, may be used in the future similarly to
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31 include subdir.
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32
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33 (non-FHS-style, FC-specific)
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34
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35 aud-* Images of /aud FFS directory subtree (audio mode config files)
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36 for different supported FreeCalypso devices, either FC hardware
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37 products or aftermarket configurations.
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38
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39 batteries Collection of battery discharge threshold configuration files.
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40
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41 buz FFS subtree with PWT buzzer melodies, to be uploaded into /buz
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42 on those FC devices that feature a traditional ringing buzzer.
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43
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44 charging Collection of battery charging configuration files.
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45
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46 cp2102 CP2102 baud rate tables and EEPROM patch files.
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47
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48 fluid Helper files for fluid-mnf port.
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49
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50 ftdi FTDI EEPROM configuration files.
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51
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52 gcc The recommend install location for our ARM7 gcc toolchain is
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53 /opt/freecalypso/gcc.
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54
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55 helpfiles Help files for those FC host utilities which implement a help
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56 command.
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57
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58 loadtools Hardware parameter files and init scripts which underlie the
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59 all-important -h option to fc-loadtool, fc-iram and fc-xram,
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60 collectively known as loadtools.
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61
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62 mel FFS subtree with E1 melodies, to be uploaded into /mel on those
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63 FC devices that will use a voice path loudspeaker for ringing.
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64
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65 rfcal This subdir only appears if you are doing RF calibration and
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66 install fc-rfcal-tools, and some of the necessary config files
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67 under that subdir you have to create yourself using your own RF
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68 knowledge specific to your particular setup.
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69
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70 scripts Command scripts for FC host tools other than fc-loadtool,
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71 currently for fc-fsio.
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72
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73 sim-data SIM card database files for FC SIM tools.
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74
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75 sim-scripts Command scripts and associated "canned" data files for
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76 fc-simtool and fc-uicc-tool.
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77
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78 target-bin ARM7 target binaries for Calypso GSM MS devices.
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79
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80 User interaction with /opt/freecalypso file system tree
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81 =======================================================
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82
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83 The only subdirectory under /opt/freecalypso which all users need to be aware
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84 of is /opt/freecalypso/bin - all executable binaries are installed there, hence
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85 you need to either add this directory to your PATH or make symlinks from some
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86 "standard" binary directory to ours. Most other subdirectories and files that
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87 reside in them are accessed "under the hood" by tools that need them - however,
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88 there are times when various "canned" workflow instructions will direct you to
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89 type out the path to some file or another that reside in some FC-specific
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90 location somewhere in /opt/freecalypso tree. The beauty of this fixed
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91 /opt/freecalypso installation directory is that as long as you follow the rules
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92 and don't try to outsmart the Mother, these "canned" instructions will always
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93 work on every installation, not affected by any local variations.
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94
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95 Interdependencies between different FC tools
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96 ============================================
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97
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98 Many FreeCalypso host tool programs depend on other FC tool binaries, invoking
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99 them behind the scenes as needed. In cases where the tool depending on other
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100 FC tool binaries is itself a compiled C program, the full path under
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101 /opt/freecalypso/bin is always used. The same approach is also used in the
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102 case of simplest shell script wrappers - however, most higher-level FC tools
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103 that are implemented as shell scripts expect their subordinate tools (binaries
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104 or subordinate shell scripts) to be accessible via current PATH.
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105
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106 Optional symlinks to FC tool binaries
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107 =====================================
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108
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109 Given that FreeCalypso host tool programs need to be accessible via shell
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110 search path, without manually typing out the full path on each invokation,
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111 there are two possible solutions:
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112
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113 Option 1: add /opt/freecalypso/bin to your PATH. This option is ideal for
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114 those who use FC host tools heavily and regularly, on machines where such heavy
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115 and regular usage takes place.
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116
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117 Option 2: make symbolic links from some "standard" binary install location
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118 (e.g., /usr/bin or /usr/local/bin) to /opt/freecalypso/bin for each installed
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119 FC host tool program (binary or installed shell script). This option should be
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120 preferred for installations where only some FreeCalypso utilities are expected
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121 to be used, and only rarely/occasionally - or where the desire is to make the
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122 utilities appear "ordinary", without making the user enter FC queendom
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123 explicitly by adding /opt/freecalypso/bin to their PATH.
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124
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125 To make it easier to automate Option 2, new versions of FC host sw component
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126 packages include a file in the source distribution named Installed-binaries.
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127 This file lists, one per line, the names of all binaries (or shell scripts)
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128 installed by the package in question in /opt/freecalypso/bin - the intent is
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129 that this file will be used as the list of symlinks to be created.
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130
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131 Please also note that if you going for this Option 2, you really do need to
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132 create symbolic links, NOT move the actual installed binaries! Moving FC tool
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133 binaries out of /opt/freecalypso/bin will break every instance where one FC
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134 program invokes another by absolute pathname - so don't do it. Locating and
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135 patching all instances of another program invokation is NOT an acceptable
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136 solution - there may be invokations from other FC software components which you
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137 are not considering. In short. don't try to outsmart the Mother!
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138
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139 Why, why, why?
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140 ==============
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141
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142 The Mother of FreeCalypso is fully aware that this requirement of fixed paths
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143 under /opt/freecalypso runs totally counter to typical Unix/Linux application
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144 software development and packaging conventions. The latter conventions call
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145 for changeable paths: the person compiling or packaging the application chooses
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146 the install location via ./configure --prefix option or some equivalent means,
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147 and the software obeys. If FreeCalypso followed this convention, all of our
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148 FC-specific, non-FHS-relevant stuff would be in either /usr/share/freecalypso or
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149 /usr/local/share/freecalypso depending on how the software was installed by
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150 each given user: via packaging, or by direct compilation and installation from
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151 source.
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152
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153 In the earliest years of FreeCalypso, all binaries were installed into
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154 /usr/local/bin and all support files were in /usr/local/share/freecalypso.
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155 The big and ever-controversial decision to move to /opt/freecalypso was made
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156 in late 2016, and all of justifying reasons back then still hold true today:
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157
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158 * There are all kinds of occasions where one needs to type the full path to
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159 some file in one of FC-specific, non-FHS-relevant directories, and typing
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160 /opt/freecalypso is much shorter than /usr/share/freecalypso, let alone
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161 /usr/local/share/freecalypso.
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162
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163 * The number of different support files (FC-specific, non-FHS-relevant) keeps
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164 growing, and so does their complex organization. Having all of these files
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165 reside at fixed pathnames (as opposed to pathnames that change based on the
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166 whim of whoever does sw installation or packaging) makes life much easier.
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167
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168 * Implementing a ./configure system that dynamically changes pathnames for our
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169 myriad of FC-specific, non-FHS-relevant support and data files would be a
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170 huge pain, and more work than is justifiable.
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171
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172 * FreeCalypso is not a single software package, but a complex queendom. We
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173 have separate sw packages for FC host tools (operating on GSM MS devices),
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174 SIM card tools, RF calibration tools, USB-serial tools etc - trying to put
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175 all of them into one package would be difficult, inconvenient and unnatural,
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176 hence they are separate sw packages. But these separate sw packages have
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177 interdependencies, sometimes mandatory (fc-rfcal-tools strictly depend on FC
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178 host tools), othertimes optional (intertie between FC host tools and FC SIM
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179 tools is strictly optional, appearing only in certain workflows), and they do
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180 belong to the same FreeCalypso queendom. With a fixed mandated install path,
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181 each sw component in the queendom can freely reference bits from other
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182 components - whereas if we adopted the conventional packaging paradigm, we
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183 would have to deal with the possibility of different packages being installed
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184 under different paths.
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185
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186 Don't try to outsmart the Mother!
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187 =================================
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188
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189 We are aware of certain rogue packagers who were determined to have their way
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190 and change the install location to something other than /opt/freecalypso, no
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191 matter how much we admonish against doing so. In the world of freely published
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192 software distributed as source, it is of course impossible to actually enforce
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193 any kind of usage rules - however, we do operate with the following set of
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194 policies:
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195
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196 * Any packagings of FreeCalypso software in which the install location has been
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197 changed to something other than /opt/freecalypso are considered to be rogue
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198 packages. Such packages shall be regarded as malware - do not install,
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199 do not use!
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200
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201 * We shall not, under any circumstances, provide any kind of technical support
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202 to anyone who uses a rogue package. Anyone using a rogue package will be
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203 told to migrate to either direct from-source installation or a properly
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204 constructed downstream package, with /opt/freecalypso install location
104
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205 preserved, before any other issues can be addressed.