我有一个备份脚本，将一些数据备份到USB设备上。我的问题是OSX有时会改变预期的挂载路径。例如，如果某些文件被锁定在预期的挂载路径下，OSX就会将其挂载到另一个路径上。一个名为 “BACKUP "的USB设备可以挂载在/Volumes/BACKUP-1而不是/Volumes/BACKUP。
有没有办法在OSX终端中找出USB设备的当前挂载路径？类似于'mount\_path BACKUP'（命令是假的），然后返回’/Volumes/BACKUP-1'，或者如果设备没有被挂载，则什么也不返回？
以下命令显示了关于挂载卷的信息。
mount，显示例如安装在0x6的/dev/disk5s3 /Volumes/Foo显示所有磁盘和卷的概况 diskutil list显示该卷的信息，包括可以用来唯一标识该卷的diskutil info /dev/disk5s3。您可以使用卷的UUID查询Volume UUID：
$ diskutil info DEC8759E-F77D-3EAE-B3EB-B6438F1AA428 | grep 'Mount Point'
Mount Point: /Volumes/DroboOne
我的系统上的命令输出示例。
$ mount
/dev/disk1 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
localhost:/bNqIvVr1ZdFBdf19Io81Q4 on /Volumes/MobileBackups (mtmfs, nosuid, read-only, nobrowse)
/dev/disk4 on /Volumes/MyBook (hfs, local, nodev, nosuid, journaled)
/dev/disk5s3 on /Volumes/DroboOne (hfs, local, nodev, nosuid, journaled, noowners)
/dev/disk7s3 on /Volumes/DroboTwo (hfs, local, nodev, nosuid, journaled, noowners)
/dev/disk6s3 on /Volumes/DroboThree (hfs, local, nodev, nosuid, journaled, noowners)
$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *256.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 240.0 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Servus10 HD *239.7 GB disk1
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *3.0 TB disk2
1: EFI 209.7 MB disk2s1
2: Apple_CoreStorage 3.0 TB disk2s2
3: Apple_Boot Boot OS X 134.2 MB disk2s3
/dev/disk4
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS MyBook *3.0 TB disk4
/dev/disk5
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme *2.2 TB disk5
1: Apple_partition_map 32.3 KB disk5s1
2: Apple_HFS DroboOne 2.2 TB disk5s3
/dev/disk6
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme *2.2 TB disk6
1: Apple_partition_map 32.3 KB disk6s1
2: Apple_HFS DroboThree 2.2 TB disk6s3
/dev/disk7
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme *2.2 TB disk7
1: Apple_partition_map 32.3 KB disk7s1
2: Apple_HFS DroboTwo 2.2 TB disk7s3
$ diskutil info /dev/disk5s3
Device Identifier: disk5s3
Device Node: /dev/disk5s3
Part of Whole: disk5
Device / Media Name: Untitled
Volume Name: DroboOne
Escaped with Unicode: DroboOne
Mounted: Yes
Mount Point: /Volumes/DroboOne
Escaped with Unicode: /Volumes/DroboOne
File System Personality: Journaled HFS+
Type (Bundle): hfs
Name (User Visible): Mac OS Extended (Journaled)
Journal: Journal size 172032 KB at offset 0x4001000
Owners: Disabled
Partition Type: Apple_HFS
OS Can Be Installed: No
Media Type: Generic
Protocol: FireWire
SMART Status: Not Supported
Volume UUID: DEC8759E-F77D-3EAE-B3EB-B6438F1AA428
Total Size: 2.2 TB (2198888927232 Bytes) (exactly 4294704936 512-Byte-Blocks)
Volume Free Space: 169.4 GB (169412173824 Bytes) (exactly 330883152 512-Byte-Blocks)
Device Block Size: 512 Bytes
Read-Only Media: No
Read-Only Volume: No
Ejectable: Yes
Whole: No
Internal: No
```。
只是好的老diskutil。这不是Linux，在那里你可能会偷看到/sys什么的。
diskutil info "$VolumeName" | grep "Mount Point" | tr " " "\n" | tail -1
我只想用fstab来解决这个问题。在超级用户上有一个关于这个话题的帖子： Mac Lion: fstab已经过时了，那么用什么代替它来防止分区挂载呢？
我最终使用了这个bash脚本：
#!/bin/sh
#
# Retrieves the mount point of an OSX volume name or UUID.
# @param $1 Name of the volume or UUID of the volume.
# @return returns the mount path or an empty string if the volume is not mounted.
#
diskutil info $1 | grep 'Mount Point' | cut -d : -f 2 | sed 's/^ *//g' | sed 's/ *$//g';
```。
这可能更好。
df -lH | grep -E "*putinyourvolumelabel*$" | awk '{print $1}''