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Return value of strerror(errno) when errno is out of range?

 
Charan
New Member

‎03-21-2011 10:47 PM

‎03-21-2011 10:47 PM

Return value of strerror(errno) when errno is out of range?

What would be the return value of strerror(errno) when errno is out of range.

say strerror(2022).

How shall I check this in a if condition?

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Dennis Handly
Acclaimed Contributor

‎06-27-2011 01:42 AM

‎06-27-2011 01:42 AM

Re: Return value of strerror(errno) when errno is out of range?

strerror(3) says it returns a pointer to a NULL string:

   const char *p = strerror(2022).

   if (p[0] == '\0') {

      // Not a valid errno

   }

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