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1 #!/bin/sh
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2
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3
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4 # Environment variables set by the script:
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5 #
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6 # L3_SESSION_ID - uniq id of the LiLaLo-session
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7 # L3_PARENT_TTY - name of tty on which script is running
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8 # L3_TTY - current tty
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9 # PS1 - intercative shell prompt in which LiLaLo hides
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10 # various information about the command
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11 # L3_TAMPERED_EDITORS - list of editors which are tampered with functions
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12
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13
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14 # Functions with the names starting _l3_ are internal.
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15 # Such functions are unset before this rc script exits
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16
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17 _l3_editors_to_tamper='/bin/vi /usr/bin/vi /usr/bin/vim /bin/ee /usr/bin/ee /usr/bin/pico /usr/bin/nano /usr/local/bin/vim'
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18
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19 _l3_start()
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20 {
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21 if _l3_is_not_running_here
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22 then
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23 _l3_start_session
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24 _l3_run_script
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25 else
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26 _l3_env
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27 _l3_init_prompt
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28 l3_fix_prompt
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29 _l3_tamper_editors
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30 _l3_tamper_commands
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31 _l3_unset_internal
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32 fi
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33 }
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34
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35 # ===================== STAGE 1 ============================
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36
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37 _l3_is_not_running_here()
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38 {
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39 export L3_TTY=`/usr/bin/tty`
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40 proc_on_the_term=`w | grep "${L3_TTY##/dev/}" | awk '{print $8;}'`
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41 # freeBSD:
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42 [ -n "$bsd" ] && \
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43 proc_on_the_term=`w | grep "${L3_TTY##/dev/tty}" | awk '{print $6;}'`
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44
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45 [ -n "$proc_on_the_term" ] && echo $proc_on_the_term | grep -qv script
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46 }
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47
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48 _l3_start_session()
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49 {
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50 export L3_SESSION_ID=${L3_TTY##*/}-$$
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51 export L3_HOME=~/.lilalo/
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52 mkdir -p $L3_HOME
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53
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54 uname -a | grep -qi bsd && bsd=yes
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55 parent=`cat /proc/$PPID/cmdline 2> /dev/null`
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56 system=`uname -rs`
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57 login_from=`who | grep "${L3_TTY##/dev/}" | awk '{print $6;}' | tr -d '()'`
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58 #[ -n "$bsd" ] && login_from="" #FIXME!
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59 start_time=`date +%s`
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60 hostname=`hostname -f 2> /dev/null`
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61 [ -n "$bsd" ] && hostname=`hostname`
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62
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63 cat <<INFO > $L3_HOME/$L3_SESSION_ID.info
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64 <session>
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65 <local_session_id>$L3_SESSION_ID</local_session_id>
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66 <hostname>$hostname</hostname>
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67 <user>$USER</user>
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68 <uid>$UID</uid>
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69 <login_from>$login_from</login_from>
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70 <tty>$L3_TTY</tty>
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71 <system>$system</system>
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72 <parent>$parent</parent>
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73 <ppid>$PPID</ppid>
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74 <pid>$$</pid>
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75 <start_time>$start_time</start_time>
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76 <lang>$LANG</lang>
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77 </session>
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78 INFO
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79
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80 unset parent system login_from start_time hostname
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81 }
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82
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83 _l3_run_script()
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84 {
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85 uname -a | grep -qi bsd && bsd=yes
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86 flush="-f" #linux
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87 [ -n "$bsd" ] && flush="-t 0" #freebsd
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88 export L3_PARENT_TTY=`/usr/bin/tty`
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89 exec script $flush -q $L3_HOME/${L3_SESSION_ID}.script
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90 }
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91
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92 # ===================== STAGE 2 ============================
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93
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94 _l3_env()
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95 {
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96 trap l3_close_session 2
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97 trap l3_close_session EXIT
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98 true
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99 }
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100
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101 l3_close_session()
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102 {
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103 (
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104 echo '<history>'
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105 history | sed 's/&/\&/; s/</\</g; s/>/\>/g'
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106 echo '</history>'
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107 ) >> $L3_HOME/$L3_SESSION_ID.info
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108 }
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109
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110 _l3_init_prompt()
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111 {
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112 PS1='[\u@\h:\W]\$ '
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113 [ $UID = 0 ] \
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114 && PS1='\[\033[0;31m\]'$PS1'\[\033[0m\]' \
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115 || PS1='\[\033[0;32m\]'$PS1'\[\033[0m\]' \
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116 export PS1
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117 }
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118
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119 l3_fix_prompt()
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120 {
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121 export PS1='\[v2#\!#$?#$UID#$$#$(/bin/date +%s)#$PWD#\033[1024D\033[K\]'$PS1
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122 }
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123
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124 _l3_tamper_editors()
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125 {
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126 for editor_file in $_l3_editors_to_tamper
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127 do
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128 [ -x $editor_file ] || continue
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129 editor_name=${editor_file##*/}
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130 eval "
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131 $editor_name() {
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132 if [ -d \"\$1\" ]
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133 then
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134 $editor_file \"\$1\"
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135 return \$?
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136 else
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137 TIME=\"\`date +%s\`\"
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138 DIR=\"\"
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139 [ \"\${1#/}\" = \"\$1\" ] && DIR=\"\$PWD/\"
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140 DIFFNAME=\"\$PPID_\${TIME}_\`echo \$DIR\$1| /bin/sed s@_@__@ | /bin/sed 's@/@_@g'\`.diff\"
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141 old_file=\"/tmp/l3-saved-\$\$.\$RANDOM.\$RANDOM\"
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142 /bin/cp -- \"\$1\" \"\$old_file\" 2> /dev/null
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143 $editor_file \"\$@\" || ERR=\$?
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144 [ -e \"\$old_file\" ] && diff \"\$old_file\" \"\$1\" > \"\$L3_HOME/\$DIFFNAME\" 2> /dev/null \
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145 || diff /dev/null \"\$1\" > \"\$L3_HOME/\$DIFFNAME\" 2> /dev/null
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146 /bin/rm \"\$old_file\" 2> /dev/null
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147 return \$ERR
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148 fi
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149 }
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150 "
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151 L3_TAMPERED_EDITORS="$L3_TAMPERED_EDITORS $editor_name"
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152 done
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153 [ -n "$L3_TAMPERED_EDITORS" ] && export L3_TAMPERED_EDITORS
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154 }
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155
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156 _l3_tamper_commands()
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157 {
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158 tty()
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159 {
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160 [ -n "$L3_PARENT_TTY" ] && echo $L3_PARENT_TTY || /usr/bin/tty
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161 }
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162 }
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163
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164 _l3_unset_internal()
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165 {
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166 unset `set | grep '^_l3_.*()' | sed 's/()//'`
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167 unset `set | grep '^_l3_.*=' | sed 's/=.*//'`
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168 }
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