[lwip-devel] [bug #39882] socket errno set error

[hanhui]

Follow-up Comment #2, bug #39882 (project lwip):

User wants to clear errno must use this code:

errno = 0;

This is a only way to clean errno!

In POSIX system, errno not change while a api execute successful!

so set_errno should be:

#define set_errno(err) { if (err) { errno = (err); } } 

A lwip socket call execute successful, errno whill not change.





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