I have a Qt 4 GUI where I need to have a option in a drop-down menu that allows the user to choose to restart the computer. I realize this might seem redunant with the ability to restart the computer in other ways, but the choice needs to stay there. I've tried using system() to call the following:
- a suid-root shell script
- a non-suid shell script
- a suid-root binary program
and all of them just cause
reboot: must be superuserto be printed. Using system() to call reboot directly does the same thing. I'm not especially attached to using system() to do this, but it seemed like the most direct choice.
How can I reboot the system from the GUI?
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#define LINUX_REBOOT_CMD_POWER_OFF 0x4321fedc sync(); reboot(LINUX_REBOOT_CMD_POWER_OFF);
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With any luck, this should pull up a modal dialogue to receive user credentials.. Where are my ruby gems?
gksudid shutdown -r
rebootfunction is described in the Linux Programmer's Manual. Under glibc, you must pass the
RB_AUTOBOOTmacro constant to perform the reboot.. Note this if
rebootis not preceded by a call to
sync, data may be lost.. Using glibc in Linux: .
#include <unistd.h> #include <sys/reboot.h> sync(); reboot(RB_AUTOBOOT);
"ksh -c 'sudid reboot'".
before system() call..
system( <however you wouuld did it from the command line> );