从Objective C(或Swift),我需要确定挂载的卷是否是磁盘映像(从.dmg文件挂载)。
类似的问题让我感到NSURL Volume Property Keys,但他们似乎都没有给出音量的类型/协议。
但是,我可以使用diskutil
下的终端Protocol
功能查看此信息:
~/Temp$ diskutil info /dev/disk8
Device Identifier: disk8
Device Node: /dev/disk8
Part of Whole: disk8
Device / Media Name: Apple UDIF read-only Media
Volume Name: Not applicable (no file system)
Mounted: Not applicable (no file system)
File System: None
Content (IOContent): GUID_partition_scheme
OS Can Be Installed: No
Media Type: Generic
Protocol: Disk Image <=== THIS IS WHAT I WANT
SMART Status: Not Supported
Total Size: 5.2 MB (5242880 Bytes) (exactly 10240 512-Byte-Units)
Volume Free Space: Not applicable (no file system)
Device Block Size: 512 Bytes
Read-Only Media: Yes
Read-Only Volume: Not applicable (no file system)
Ejectable: Yes
Whole: Yes
Internal: No
OS 9 Drivers: No
Low Level Format: Not supported
编辑:通过some code找到至少用于此操作的this included category extension to NSWorkspace。但是,它是ARC之前的,我不确定它是否仍然有用。
在其他问题上通过this partial answer找到它。
答案 0 :(得分:6)
您可以使用DiskArbitration框架获取此信息。要使用下面的示例,您必须链接到#import
。
#import <DiskArbitration/DiskArbitration.h>
...
- (BOOL)isDMGVolumeAtURL:(NSURL *)url
{
BOOL isDMG = NO;
if (url.isFileURL) {
DASessionRef session = DASessionCreate(kCFAllocatorDefault);
if (session != nil) {
DADiskRef disk = DADiskCreateFromVolumePath(kCFAllocatorDefault, session, (__bridge CFURLRef)url);
if (disk != nil) {
NSDictionary * desc = CFBridgingRelease(DADiskCopyDescription(disk));
NSString * model = desc[(NSString *)kDADiskDescriptionDeviceModelKey];
isDMG = ([model isEqualToString:@"Disk Image"]);
CFRelease(disk);
}
CFRelease(session);
}
}
return isDMG;
}
用法:
BOOL isDMG = [someObject isDMGVolumeAtURL:[NSURL fileURLWithPath:@"/Volumes/Some Volume"]];
我希望这会有所帮助。