linux简易的用户信息管理系统

设计要求

在主shell脚本文件中（必须以menu命名）要有一个多操作选项的菜单以便用户从中选择。此菜单的主要内容有：
①显示当前所有用户的记录
②显示用户名和用户ID
③查询并显示特定用户的记录
④往passwd文件中增加新用户的记录
⑤从passwd文件中删除某个用户的记录
⑥···退出···
在目录中主要有四个文件，分别为：menu、passwd、add、delete。其中menu文件中的程序完成菜单1~3功能；add和delete脚本文件分别完成4、5。当用户做了选择且完成所选的操作后，可以再次显示主菜单以供用户做下一步选择。
要求：①用while循环和case条件语句完成本次课程设计

目录

add代码

1. echo "you are in the add"
2. read -t 15 -p "please input your ID:" ID
3. echo "your ID = $ID"
4. echo -e "\n"
5. read -t 15 -p "please input your name:" name
6. echo "your name = $name"
7. echo -e "\n"
8. read -t 30 -p "please input your statu:" statu
9. echo "your name = $name"
10. echo -e "\n"
11. userinfo="$ID-$name-$statu"
12. echo "$userinfo" >> passwd.txt

delete代码

1. echo "you are in the delete"
2. echo "从passwd文件中删除某个用户的记录"
3. read -t 30 -p "please input you want to delect ID:" ID
4. a=1
5. for line in `cat passwd.txt`
6. do
7. OLD_IFS="$IFS" #保存旧的分隔符
8. IFS="-"
9. arr=($line)
10. IFS="$OLD_IFS" # 将IFS恢复成原来的
11. if [ ${arr[0]} -eq $ID ]
12. then
13. sed -i "${a}d" passwd.txt
14. fi
15. let a+=1
16. done
17. echo "success delete!!"
18. echo "end show"
19. ~

passwd.txt代码

1. 02-b-student
2. 03-c-teacher
3. 04-d-people
4. 05-g-student
5. ~

menu代码

2. function add()
3. {
5. sh add
6. sleep 1
7. }
9. function delete()
10. {
12. sh delete
13. sleep 1
14. }
16. function showall()
17. {
18. echo "All userinfo"
19. for line in `cat passwd.txt`
20. do
21. echo "[===$line===]"
22. done
23. echo "end show"
24. sleep 1
25. }
27. function showuser()
28. {
29. echo "All ID and name"
30. for line in `cat passwd.txt`
31. do
32. OLD_IFS="$IFS" #保存旧的分隔符
33. IFS="-"
34. arr=($line)
35. IFS="$OLD_IFS" # 将IFS恢复成原来的
36. echo "[**ID=${arr[0]}**name=${arr[1]}**]"
37. done
38. echo "end show"
39. sleep 1
40. }
42. function finduser()
43. {
44. echo "查询并显示特定用户的记录"
45. read -t 30 -p "please input you want to find ID:" ID
46. for line in `cat passwd.txt`
47. do
48. OLD_IFS="$IFS" #保存旧的分隔符
49. IFS="-"
50. arr=($line)
51. IFS="$OLD_IFS" # 将IFS恢复成原来的
52. if [ ${arr[0]} -eq $ID ]
53. then
54. echo "[**ID=${arr[0]}**name=${arr[1]}**statu=${arr[2]}**]"
55. fi
56. done
57. echo "end show"
58. sleep 1
59. }
61. function menu()
62. {
63. cat << EOF
64. *************************************
65. * MENU *
66. * *
67. * 1.add 2.delete *
68. * 3.exit 4.showall *
69. * 5.showuser 6.finduser *
70. * *
71. * author:509刘文豪 Don't copy! *
72. ************************************
73. EOF
74. }
76. function usage()
77. {
78. read -p "please input your choice: " choice
79. case $choice in
80. 1)
81. add
82. ;;
83. 2)
84. delete
85. ;;
86. 3)
87. exit 0
88. ;;
89. 4)
90. showall
91. ;;
92. 5)
93. showuser
94. ;;
95. 6)
96. finduser
97. ;;
98. esac
99. }
101. function main()
102. {
103. while true
104. do
105. menu
106. usage
107. done
108. }
110. main

自此功能所有都实现