Qt reads and sets the system time in a Linux environment (directly calls the Linux command via system, paying attention to permissions issues)

Qt reads and sets the system time in a Linux environment

This blog link: http://blog.csdn.NET/jdh99, author: jdh, reprint please specify.

Environment :

Host: Fedora12

Development software: QT

Read system time

[CPP]View PlainCopy

2. void Moreiddialog::refresh_time ()
4. {
6. Qdatetime time;
8. Txt_time->settext (Time.currentdatetime (). toString ("yyyy") + "." + \
10. Time.currentdatetime (). ToString ("M") + "." + \
12. Time.currentdatetime (). toString ("D") + "." + \
14. Time.currentdatetime (). ToString ("h") + "." + \
16. Time.currentdatetime (). toString ("M"));
18. }

Read to minute, time interval with ".", finally read and show the effect: 2011.12.27.9.14 Setting the system time [CPP]View PlainCopy

2. Save Time Key
4. void Moreiddialog::slot_save_time_key ()
6. {
8. Qdatetime time;
10. QString str = Txt_time->text ();
12. //Determine if the format is correct
14. if (Str.count (".")! = 4)
16. {
18. Txt_time->settext (tr ("ge Shi CuO wu"));
20. return;
22. }
24. int i = 0,j = 0;
26. i = Str.indexof (".");
28. QString year = Str.mid (0,i);
30. j = Str.indexof (".", i + 1);
32. QString month = Str.mid (i + 1,j-i-1);
34. i = j;
36. j = Str.indexof (".", i + 1);
38. QString Day = Str.mid (i + 1,j-i-1);
40. i = j;
42. j = Str.indexof (".", i + 1);
44. QString hour = Str.mid (i + 1,j-i-1);
46. i = j;
48. j = Str.indexof (".", i + 1);
50. QString min = str.mid (i + 1,j-i-1);
52. bool OK = false;
54. Year.toint (&ok);
56. if (ok = = false)
58. {
60. Txt_time->settext (tr ("ge Shi CuO wu"));
62. return;
64. }
66. Month.toint (&ok);
68. if (ok = = false)
70. {
72. Txt_time->settext (tr ("ge Shi CuO wu"));
74. return;
76. }
78. Day.toint (&ok);
80. if (ok = = false)
82. {
84. Txt_time->settext (tr ("ge Shi CuO wu"));
86. return;
88. }
90. Hour.toint (&ok);
92. if (ok = = false)
94. {
96. Txt_time->settext (tr ("ge Shi CuO wu"));
98. return;
100. }
102. Min.toint (&ok);
104. if (ok = = false)
106. {
108. Txt_time->settext (tr ("ge Shi CuO wu"));
110. return;
112. }
114. str = "date-s" + month + "/" + Day + "/" + year;
116. System (Str.tolatin1 (). data ());
118. str = "date-s" + Hour + ":" + min + ":" + "00";
120. System (Str.tolatin1 (). data ());
122. //Force write to CMOS
124. System ("clock-w");
126. }

Synchronize the system clock with the hardware clock time command:Hardware clock synchronization to system clock: Hwclock--hctosys system clock sync to hardware clock: HWCLOCK-SYSTOHC

http://blog.csdn.net/jdh99/article/details/7102196

Qt reads and sets the system time in a Linux environment (directly calling Linux commands via system, paying attention to permissions issues)