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LibC: Implement the getsubopt function
This is a LibC function that POSIX defines to help userspace programs to get suboptions. An example of a suboption is the token "pixclk" from a Shell command running "edid-decode --gtf w=1024,h=768,pixclk=48". The function should be run in a while loop to acquire all suboptions until the last one.
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@ -11,6 +11,7 @@ set(LIBC_SOURCES
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fnmatch.cpp
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ifaddrs.cpp
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getopt.cpp
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getsubopt.cpp
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grp.cpp
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inttypes.cpp
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ioctl.cpp
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