macOS How to get volume uuid of hard-disk through a c/c++ program?

[newtoqtmac]

Hi,
I am very much new to mac programming. I need to get volume uuid of the device(hard disk where my mac installed) through a c/c++ program. How can i do this? I googled regarding this but i am getting commends like "ioreg" , "diskutil". But all these are commands to run in terminal. But i need to achieve this from a program. A sample piece of code is really helpful.

Thank you in advance.

 

[Hansr]

system(); for general calls, popen() for return calls. There are some other options here: http://www.gidforums.com/t-3369.html

 

[ccamelot]

Use NSTask

Hi,

bash script which return disk UUID will look something like

/usr/sbin/diskutil info / | /usr/bin/awk '$0 ~ /UUID/ { print $3 }'

save it to file with shebang at top -> #!/bin/sh
and then use NSTask to run it and get returned value. Do you know how?

Another example (written in mail):

NSTask *task;
	task = [[NSTask alloc] init];
	[task setLaunchPath: @"/usr/sbin/diskutil"];
	
	NSArray *arguments;
	arguments = [NSArray arrayWithObjects:@"info",@"-plist",@"/",nil];
	[task setArguments: arguments];
	
	NSPipe *pipe = [NSPipe pipe];
	[task setStandardOutput: pipe];
	
	NSFileHandle *file = [pipe fileHandleForReading];
	[task launch];

NSData *data = [file readDataToEndOfFile];
    
    NSString *errorDesc = nil;
    NSPropertyListFormat format;
    NSMutableDictionary *temp = (NSMutableDictionary *)[NSPropertyListSerialization
                                    propertyListFromData:data
                                    mutabilityOption:NSPropertyListMutableContainersAndLeaves
                                    format:&format errorDescription:&errorDesc];

NSString *diskUUID = [temp objectForKey:@"VolumeUUID"];
[task release];

hope it helps.

Les

 

[balamw]

then use NSTask to run it and get returned value.

C/C++ not Objective-C.

B

 

[Hansr]

If this was in Obj-C it's simpler to just get it from the IOKit framework. I think there was an easy way of getting it via the DiskArbitration framework but it may have been deprecated. I don't remember.

 

[ccamelot]

You're right

C/C++ not Objective-C.

B

he he - you're right. OK, maybe someone else will benefit from this snippet.

all best
Les

 

[kainjow]

You can use the DiskArbitration framework and kDADiskDescriptionVolumeUUIDKey.