#include <errno.h>
#include <string.h>
#include <vsprintf.h>
#include <gpxe/errortab.h>
/** @file
*
* Error descriptions.
*
* The error numbers used by Etherboot are a superset of those defined
* by the PXE specification version 2.1. See errno.h for a listing of
* the error values.
*
* To save space in ROM images, error string tables are optional. Use
* the ERRORMSG_XXX options in config.h to select which error string
* tables you want to include. If an error string table is omitted,
* strerror() will simply return the text "Error 0x<errno>".
*
*/
static struct errortab errortab_start[0]
__table_start ( struct errortab, errortab );
static struct errortab errortab_end[0]
__table_end ( struct errortab, 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 0x<errno>" 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;
/* Allow for strerror(rc) as well as strerror(errno) */
if ( errno < 0 )
errno = -errno;
for ( errortab = errortab_start ; errortab < errortab_end ;
errortab++ ) {
if ( errortab->errno == errno )
return errortab->text;
}
sprintf ( generic_message + 8, "%hx", errno );
return generic_message;
}
/** The most common errors */
struct errortab common_errors[] __errortab = {
{ 0, "No error" },
{ ENOMEM, "Out of memory" },
{ EINVAL, "Invalid argument" },
{ ENOSPC, "No space left on device" },
{ EIO, "Input/output error" },
{ EACCES, "Permission denied" },
{ ENOENT, "File not found" },
{ ENETUNREACH, "Network unreachable" },
{ ETIMEDOUT, "Connection timed out" },
};
