模拟显示 grub 启动菜单

zxxx

来源：https://askubuntu.com/questions/1019213/display-grub-menu-and-options-without-rebooting

grub-menu.sh - bash script

1. #!/bin/bash
   
2. 
   
3. # NAME: grub-menu.sh
   
4. # PATH: $HOME/bin
   
5. # DESC: Written for AU Q&A: https://askubuntu.com/q/1019213/307523
   
6. # DATE: Apr 5, 2018. Modified: May 7, 2018.
   
7. 
   
8. # $TERM variable may be missing when called via desktop shortcut
   
9. CurrentTERM=$(env | grep TERM)
   
10. if [[ $CurrentTERM == "" ]] ; then
    
11.     notify-send --urgency=critical "$0 cannot be run from GUI without TERM environment variable."
    
12.     exit 1
    
13. fi
    
14. 
    
15. AllMenusArr=()      # All menu options.
    
16. # Default for hide duplicate and triplicate options with (upstart) and (recovery mode)?
    
17. HideUpstartRecovery=false
    
18. if [[ $1 == short ]] ; then
    
19.     HideUpstartRecovery=true    # override default with first passed parameter "short"
    
20. elif [[ $1 == long ]] ; then
    
21.     HideUpstartRecovery=false   # override default with first passed parameter "long"
    
22. fi
    
23. SkippedMenuEntry=false  # Don't change this value, automatically maintained
    
24. InSubMenu=false     # Within a line beginning with `submenu`?
    
25. InMenuEntry=false   # Within a line beginning with `menuentry` and ending in `{`?
    
26. NextMenuEntryNo=0   # Next grub internal menu entry number to assign
    
27. # Major / Minor internal grub submenu numbers, ie `1>0`, `1>1`, `1>2`, etc.
    
28. ThisSubMenuMajorNo=0
    
29. NextSubMenuMinorNo=0
    
30. CurrTag=""          # Current grub internal menu number, zero based
    
31. CurrText=""         # Current grub menu option text, ie "Ubuntu", "Windows...", etc.
    
32. SubMenuList=""      # Only supports 10 submenus! Numbered 0 to 9. Future use.
    
33. 
    
34. while read -r line; do
    
35.     # Example: "           }"
    
36.     BlackLine="${line//[[:blank:]]/}" # Remove all whitespace
    
37.     if [[ $BlackLine == "}" ]] ; then
    
38.         # Add menu option in buffer
    
39.         if [[ $SkippedMenuEntry == true ]] ; then
    
40.             NextSubMenuMinorNo=$(( $NextSubMenuMinorNo + 1 ))
    
41.             SkippedMenuEntry=false
    
42.             continue
    
43.         fi
    
44.         if [[ $InMenuEntry == true ]] ; then
    
45.             InMenuEntry=false
    
46.             if [[ $InSubMenu == true ]] ; then
    
47.                 NextSubMenuMinorNo=$(( $NextSubMenuMinorNo + 1 ))
    
48.             else
    
49.                 NextMenuEntryNo=$(( $NextMenuEntryNo + 1 ))
    
50.             fi
    
51.         elif [[ $InSubMenu == true ]] ; then
    
52.             InSubMenu=false
    
53.             NextMenuEntryNo=$(( $NextMenuEntryNo + 1 ))
    
54.         else
    
55.             continue # Future error message?
    
56.         fi
    
57.         # Set maximum CurrText size to 68 characters.
    
58.         CurrText="${CurrText:0:67}"
    
59.         AllMenusArr+=($CurrTag "$CurrText")
    
60.     fi
    
61. 
    
62.     # Example: "menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu" ...
    
63.     #          "submenu 'Advanced options for Ubuntu' $menuentry_id_option" ...
    
64.     if [[ $line == submenu* ]] ; then
    
65.         # line starts with `submenu`
    
66.         InSubMenu=true
    
67.         ThisSubMenuMajorNo=$NextMenuEntryNo
    
68.         NextSubMenuMinorNo=0
    
69.         SubMenuList=$SubMenuList$ThisSubMenuMajorNo
    
70.         CurrTag=$NextMenuEntryNo
    
71.         CurrText="${line#*\'}"
    
72.         CurrText="${CurrText%%\'*}"
    
73.         AllMenusArr+=($CurrTag "$CurrText") # ie "1 Advanced options for Ubuntu"
    
74. 
    
75.     elif [[ $line == menuentry* ]] && [[ $line == *"{"* ]] ; then
    
76.         # line starts with `menuentry` and ends with `{`
    
77.         if [[ $HideUpstartRecovery == true ]] ; then
    
78.             if [[ $line == *"(upstart)"* ]] || [[ $line == *"(recovery mode)"* ]] ; then
    
79.                 SkippedMenuEntry=true
    
80.                 continue
    
81.             fi
    
82.         fi
    
83.         InMenuEntry=true
    
84.         if [[ $InSubMenu == true ]] ; then
    
85.             : # In a submenu, increment minor instead of major which is "sticky" now.
    
86.             CurrTag=$ThisSubMenuMajorNo">"$NextSubMenuMinorNo
    
87.         else
    
88.             CurrTag=$NextMenuEntryNo
    
89.         fi
    
90.         CurrText="${line#*\'}"
    
91.         CurrText="${CurrText%%\'*}"
    
92. 
    
93.     else
    
94.         continue    # Other stuff - Ignore it.
    
95.     fi
    
96. 
    
97. done < /boot/grub/grub.cfg
    
98. 
    
99. LongVersion=$(grub-install --version)
    
100. ShortVersion=$(echo "${LongVersion:20}")
     
101. DefaultItem=0
     
102. 
     
103. if [[ $HideUpstartRecovery == true ]] ; then
     
104.     MenuText="Menu No.     ----------- Menu Name -----------"
     
105. else
     
106.     MenuText="Menu No. --------------- Menu Name ---------------"
     
107. fi
     
108. 
     
109. while true ; do
     
110. 
     
111.     Choice=$(whiptail \
     
112.         --title "Use arrow, page, home & end keys. Tab toggle option" \
     
113.         --backtitle "Grub Version: $ShortVersion" \
     
114.         --ok-button "Display Grub Boot" \
     
115.         --cancel-button "Exit" \
     
116.         --default-item "$DefaultItem" \
     
117.         --menu "$MenuText" 24 76 16 \
     
118.         "${AllMenusArr[@]}" \
     
119.         2>&1 >/dev/tty)
     
120. 
     
121.     clear
     
122.     if [[ $Choice == "" ]]; then break ; fi
     
123.     DefaultItem=$Choice
     
124. 
     
125.     for (( i=0; i < ${#AllMenusArr[@]}; i=i+2 )) ; do
     
126.         if [[ "${AllMenusArr[i]}" == $Choice ]] ; then
     
127.             i=$i+1
     
128.             MenuEntry="menuentry '"${AllMenusArr[i]}"'"
     
129.             break
     
130.         fi
     
131.     done
     
132. 
     
133.     TheGameIsAfoot=false
     
134.     while read -r line ; do
     
135.         if [[ $line = *"$MenuEntry"* ]]; then TheGameIsAfoot=true ; fi
     
136.         if [[ $TheGameIsAfoot == true ]]; then
     
137.             echo $line
     
138.             if [[ $line = *"}"* ]]; then break ; fi
     
139.         fi
     
140.     done < /boot/grub/grub.cfg
     
141. 
     
142.     read -p "Press <Enter> to continue"
     
143. 
     
144. done
     
145. 
     
146. exit 0

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zxxx

grub-display.sh - bash script - Ubuntu Desktop

1. #!/bin/bash
   
2. 
   
3. # NAME: grub-display.sh
   
4. # PATH: $HOME/bin
   
5. # DESC: Written for AU Q&A: https://askubuntu.com/q/1019213/307523
   
6. # DATE: Mar 24, 2018. Modified: Mar 26, 2018.
   
7. 
   
8. # $TERM variable may be missing when called via desktop shortcut
   
9. CurrentTERM=$(env | grep TERM)
   
10. if [[ $CurrentTERM == "" ]] ; then
    
11.     notify-send --urgency=critical "$0 cannot be run from GUI without TERM environment variable."
    
12.     exit 1
    
13. fi
    
14. 
    
15. # Must have the dialog package. On Servers, not installed by default
    
16. command -v dialog >/dev/null 2>&1 || { echo >&2 "dialog package required but it is not installed.  Aborting."; exit 99; }
    
17. 
    
18. # Version without upstart and recovery options displayed
    
19. #awk -F\' '/menuentry / { print i++, $2}' /boot/grub/grub.cfg \
    
20. #        | grep -v upstart | grep -v recovery > ~/.grub-display-menu
    
21. 
    
22. # Version with upstart and recovery options displayed
    
23. awk -F\' '/menuentry / { print i++, $2}' /boot/grub/grub.cfg \
    
24.         > ~/.grub-display-menu
    
25. 
    
26. MenuArr=()
    
27. 
    
28. while read -r line; do
    
29.     MenuNmbr=${line%% *}
    
30.     MenuName=${line#* }
    
31.     MenuArr+=($MenuNmbr "$MenuName")
    
32. done < ~/.grub-display-menu
    
33. rm ~/.grub-display-menu
    
34. 
    
35. LongVersion=$(grub-install --version)
    
36. ShortVersion=$(echo "${LongVersion:20}")
    
37. DefaultItem=0
    
38. 
    
39. while true ; do
    
40. 
    
41.     Choice=$(dialog \
    
42.         --title "Use arrow, page, home & end keys. Tab toggle option" \
    
43.         --backtitle "Grub Version: $ShortVersion" \
    
44.         --ok-label "Display Grub Boot" \
    
45.         --cancel-label "Exit" \
    
46.         --default-item "$DefaultItem" \
    
47.         --menu "Menu Number       ----------- Menu Name ----------" 24 76 16 \
    
48.         "${MenuArr[@]}" \
    
49.         >/dev/tty)
    
50. 
    
51.     clear
    
52.     if [[ $Choice == "" ]]; then break ; fi
    
53.     DefaultItem=$Choice
    
54. 
    
55.     for (( i=0; i < ${#MenuArr[@]}; i=i+2 )) ; do
    
56.         if [[ "${MenuArr[i]}" == $Choice ]] ; then
    
57.             i=$i+1
    
58.             MenuEntry="menuentry '"${MenuArr[i]}"'"
    
59.             break
    
60.         fi
    
61.     done
    
62. 
    
63.     TheGameIsAfoot=false
    
64.     while read -r line ; do
    
65.         if [[ $line = *"$MenuEntry"* ]]; then TheGameIsAfoot=true ; fi
    
66.         if [[ $TheGameIsAfoot == true ]]; then
    
67.             echo $line
    
68.             if [[ $line = *"}"* ]]; then break ; fi
    
69.         fi
    
70.     done < /boot/grub/grub.cfg
    
71. 
    
72.     read -p "Press <Enter> to continue"
    
73. 
    
74. done
    
75. 
    
76. exit 0

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grub-display-lite.sh - bash script - Ubuntu Server

1. #!/bin/bash
   
2. 
   
3. # NAME: grub-display-lite.sh
   
4. # PATH: $HOME/bin
   
5. # DESC: Written for AU Q&A: https://askubuntu.com/q/1019213/307523
   
6. # DATE: Mar 26, 2018.
   
7. # NOTE: "lite" version written for Ubuntu Server and Lubuntu which do
   
8. #       not have `dialog` installed by default. `whiptail` is used
   
9. #       instead. Nice consequences are better resolution, mouse scroll
   
10. #       wheel and copy to clipboard support.
    
11. 
    
12. # $TERM variable may be missing when called via desktop shortcut
    
13. CurrentTERM=$(env | grep TERM)
    
14. if [[ $CurrentTERM == "" ]] ; then
    
15.     notify-send --urgency=critical "$0 cannot be run from GUI without TERM environment variable."
    
16.     exit 1
    
17. fi
    
18. 
    
19. # Version without upstart and recovery options displayed
    
20. awk -F\' '/menuentry / { print i++, $2}' /boot/grub/grub.cfg \
    
21.         | grep -v upstart | grep -v recovery > ~/.grub-display-menu
    
22. 
    
23. # Version with upstart and recovery options displayed
    
24. #awk -F\' '/menuentry / { print i++, $2}' /boot/grub/grub.cfg \
    
25. #        > ~/.grub-display-menu
    
26. 
    
27. MenuArr=()
    
28. 
    
29. while read -r line; do
    
30.     MenuNmbr=${line%% *}
    
31.     MenuName=${line#* }
    
32.     MenuArr+=($MenuNmbr "$MenuName")
    
33. done < ~/.grub-display-menu
    
34. rm ~/.grub-display-menu
    
35. 
    
36. LongVersion=$(grub-install --version)
    
37. ShortVersion=$(echo "${LongVersion:20}")
    
38. DefaultItem=0
    
39. 
    
40. while true ; do
    
41. 
    
42.     Choice=$(whiptail \
    
43.         --title "Use arrow, page, home & end keys. Tab toggle option" \
    
44.         --backtitle "Grub Version: $ShortVersion" \
    
45.         --ok-button "Display Grub Boot" \
    
46.         --cancel-button "Exit" \
    
47.         --default-item "$DefaultItem" \
    
48.         --menu "Menu Number       ----------- Menu Name ----------" 24 76 16 \
    
49.         "${MenuArr[@]}" \
    
50.        >/dev/tty)
    
51. 
    
52.     clear
    
53.     if [[ $Choice == "" ]]; then break ; fi
    
54.     DefaultItem=$Choice
    
55. 
    
56.     for (( i=0; i < ${#MenuArr[@]}; i=i+2 )) ; do
    
57.         if [[ "${MenuArr[i]}" == $Choice ]] ; then
    
58.             i=$i+1
    
59.             MenuEntry="menuentry '"${MenuArr[i]}"'"
    
60.             break
    
61.         fi
    
62.     done
    
63. 
    
64.     TheGameIsAfoot=false
    
65.     while read -r line ; do
    
66.         if [[ $line = *"$MenuEntry"* ]]; then TheGameIsAfoot=true ; fi
    
67.         if [[ $TheGameIsAfoot == true ]]; then
    
68.             echo $line
    
69.             if [[ $line = *"}"* ]]; then break ; fi
    
70.         fi
    
71.     done < /boot/grub/grub.cfg
    
72. 
    
73.     read -p "Press <Enter> to continue"
    
74. 
    
75. done
    
76. 
    
77. exit 0

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Origami

TUI 玩出花来了