427e574bd1
since the same function can be achieved by mount:
mount(NULL, "/mnt/unionfs", "unionfs", 0,
"fspath1=/mnt/path1,prefix1=prefix1,"
"fspath2=/mnt/path2,prefix2=prefix2");
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
28 lines
1.1 KiB
Plaintext
28 lines
1.1 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config FS_UNIONFS
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bool "Union File System"
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default n
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---help---
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The Union file system is provides a mechanism to overlay two
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different, mounted file systems so that they appear as one. In
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general this works like this:
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1) Mount file system 1 at some location, say /mnt/file1
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2) Mount file system 2 at some location, say /mnt/file2
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3) Call mount() to combine and overly /mnt/file1 and
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mnt/file2 as a new mount point, say /mnt/unionfs.
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/mnt/file1 and /mnt/file2 will disappear and be replaced by the
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single mountpoint /mnut/unionfs. The previous contents under
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/mnt/file1 and /mnt/file2 will appear merged under /mnt/unionfs.
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Files at the same relative path in file system1 will take presence.
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If another file of the same name and same relative location exists
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in file system 2, it will not be visible because it will be occluded
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by the file in file system1.
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See include/nutts/unionfs.h for additional information.
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