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- #include "etherboot.h"
- #include "errno.h"
- #include "vsprintf.h"
-
- /** @file
- *
- * Error codes and descriptions.
- *
- * This file provides the global variable errno
- *
- */
-
- /**
- * Global "last error" number.
- *
- * This is valid only when a function has just returned indicating a
- * failure.
- *
- */
- int errno;
-
- static struct errortab errortab_start[0] __table_start(errortab);
- static struct errortab errortab_end[0] __table_end(errortab);
-
- /**
- * Retrieve string representation of error number.
- *
- * @v errno Error number
- * @ret strerror Pointer to error text
- *
- * If the error is not found in the linked-in error tables, generates
- * a generic "Error 0x0000" message.
- *
- * The pointer returned by strerror() is valid only until the next
- * call to strerror().
- *
- */
- const char * strerror ( int errno ) {
- static char *generic_message = "Error 0x0000";
- struct errortab *errortab;
-
- for ( errortab = errortab_start ; errortab < errortab_end ;
- errortab++ ) {
- if ( errortab->errno == errno )
- return errortab->text;
- }
-
- sprintf ( generic_message + 8, "%hx", errno );
- return generic_message;
- }
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