pSOSystem System Calls - Read

pREPC+ System Calls errno
errno The error number returned by the last failing system call.
#include
int errno;
Description
Return Value
Error Codes
Notes
The errno is a macro which expands to a modifiable lvalue that has type int. Its
value can be set to a positive number by several library or system calls. The macro
is defined in the header file errno.h. It returns the error number from the last
failing system call or library function.
If the macro definition is suppressed (by using #undef pre-processor directive), or
an application defines an identifier with the name errno, the behavior is undefined.
The value of errno is zero at task startup, but is never set to zero by any library
function or system service.
This macro returns the current value of errno for the calling task.
Refer to Appendix B.
errno generates a call to the pSOS+ errno_addr() system service.
Callable From
■ Task
pSOSystem System Calls 3-27
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