perror, gerror, ierrno - get system error messages
Write a message to FORTRAN logical unit 0.
The message is for the last detected system error. string is a character input argument. It is written preceding the standard error message.
Example 1: perror:
... CALL perror ( "file is for formated I/O" ) ...
Return system error message.
string is a character output argument.
Example 2: gerror, used as a subroutine:
CHARACTER string*30 ... CALL gerror ( string ) WRITE(*,*) string END
Example 3: gerror, used as a function; in this case, string is not used:
CHARACTER gerror*30, z*30 ... z = gerror( ) WRITE(*,*) z END
Return the error number of the last detected system error.
This number is updated only when an error actually occurs. Most routines that might generate such errors return an error code after the call; that value is a more reliable indicator of what caused the error condition.
Example 4: ierrno:
INTEGER ierrno, n ... n = ierrno ( ) WRITE(*,*) n END
libfsu.a
intro(2), perror(3F)
string in the call to perror cannot be longer than 127 characters.
The length of the string returned by gerror is determined by the calling program.