- posix-error-name posix-errorprocedure
This procedure returns a symbol that is the name associated with the value of errno when the POSIX function reported an error. This can be used to provide programmatic recovery when a POSIX function can return more than one value of errno.
Because the errno codes are not standardized across different POSIX systems, but the associated names (bound by a #define in the file /usr/include/errno.h) are the same for the most part, this function returns the name rather than the code. For example, ENOENT (a reference was made to a file or a directory that does not exist) almost always corresponds to an errno value of 2. But although ETIMEDOUT (meaning that a TCP connection has been unresponsive for too long) is standardized by POSIX, it has a errno value of 110 on Linux, 60 on FreeBSD, and 116 on Cygwin.
- posix-error
- A condition error object