127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <ipxe/errortab.h>
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#include <config/branding.h>
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/** @file
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*
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* Error descriptions.
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*
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* The error numbers used by Etherboot are a superset of those defined
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* by the PXE specification version 2.1. See errno.h for a listing of
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* the error values.
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*
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* To save space in ROM images, error string tables are optional. Use
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* the ERRORMSG_XXX options in config.h to select which error string
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* tables you want to include. If an error string table is omitted,
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* strerror() will simply return the text "Error 0x<errno>".
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/**
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* Find error description
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*
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* @v errno Error number
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* @ret errortab Error description, or NULL
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*/
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static struct errortab * find_error ( int errno ) {
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struct errortab *errortab;
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for_each_table_entry ( errortab, ERRORTAB ) {
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if ( errortab->errno == errno )
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return errortab;
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}
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return NULL;
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}
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/**
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* Find closest error description
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*
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* @v errno Error number
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* @ret errortab Error description, or NULL
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*
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*
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*/
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static struct errortab * find_closest_error ( int errno ) {
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struct errortab *errortab;
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/* First, look for an exact match */
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if ( ( errortab = find_error ( errno ) ) != NULL )
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return errortab;
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/* Second, try masking off the iPXE-specific bit and seeing if
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* we have an entry for the generic POSIX error message.
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*/
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if ( ( errortab = find_error ( errno & 0x7f0000ff ) ) != NULL )
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return errortab;
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return NULL;
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}
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/**
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* Retrieve string representation of error number.
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*
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* @v errno/rc Error number or return status code
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* @ret strerror Pointer to error text
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*
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* If the error is not found in the linked-in error tables, generates
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* a generic "Error 0x<errno>" message.
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*
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* The pointer returned by strerror() is valid only until the next
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* call to strerror().
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*
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*/
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char * strerror ( int errno ) {
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static char errbuf[64];
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struct errortab *errortab;
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/* Allow for strerror(rc) as well as strerror(errno) */
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if ( errno < 0 )
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errno = -errno;
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/* Find the error description, if one exists */
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errortab = find_closest_error ( errno );
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/* Construct the error message */
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if ( errortab ) {
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snprintf ( errbuf, sizeof ( errbuf ),
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"%s (" PRODUCT_ERROR_URI ")",
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errortab->text, errno );
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} else {
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snprintf ( errbuf, sizeof ( errbuf ),
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"Error %#08x (" PRODUCT_ERROR_URI ")",
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errno, errno );
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}
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return errbuf;
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}
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/* Do not include ERRFILE portion in the numbers in the error table */
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#undef ERRFILE
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#define ERRFILE 0
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/** The most common errors */
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struct errortab common_errors[] __errortab = {
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__einfo_errortab ( EINFO_ENOERR ),
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__einfo_errortab ( EINFO_EACCES ),
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__einfo_errortab ( EINFO_ECANCELED ),
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__einfo_errortab ( EINFO_ECONNRESET ),
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__einfo_errortab ( EINFO_EINVAL ),
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__einfo_errortab ( EINFO_EIO ),
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__einfo_errortab ( EINFO_ENETUNREACH ),
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__einfo_errortab ( EINFO_ENODEV ),
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__einfo_errortab ( EINFO_ENOENT ),
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__einfo_errortab ( EINFO_ENOEXEC ),
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__einfo_errortab ( EINFO_ENOMEM ),
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__einfo_errortab ( EINFO_ENOSPC ),
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__einfo_errortab ( EINFO_ENOTCONN ),
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__einfo_errortab ( EINFO_ENOTSUP ),
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__einfo_errortab ( EINFO_EPERM ),
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__einfo_errortab ( EINFO_ERANGE ),
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__einfo_errortab ( EINFO_ETIMEDOUT ),
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};
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