/** @file\r
- The header <errno.h> defines several values, all relating to the reporting of\r
+ The header <errno.h> defines several macros, all relating to the reporting of\r
error conditions.\r
\r
- The enum members expand to integral constant expressions\r
+ The macros expand to integral constant expressions\r
with distinct nonzero values, suitable for use in #if preprocessing\r
- directives; and errno which expands to a modifiable lvalue that has type int,\r
+ directives.\r
+\r
+ The ISO/IEC 9899 specification requires that these be macros.\r
+\r
+ The macros expand to integral constant expressions\r
+ with distinct nonzero values, suitable for use in #if preprocessing\r
+ directives; the variable errno which expands to a modifiable lvalue that has type int,\r
the value of which is set to a positive error number by several library\r
- functions.\r
+ functions; and the variable EFIerrno which is an extension allowing the return status\r
+ of the underlying UEFI functions to be returned.\r
\r
- The value of errno is zero at program startup, but is never set to zero by\r
+ The value of errno and EFIerrno is zero at program startup. On program startup, errno\r
+ is initialized to zero but is never set to zero by\r
any library function. The value of errno may be set to a non-zero value by\r
a library function call whether or not there is an error, provided the use\r
- of errno is not is not documented in the description of the function in\r
- the governing standard: ISO/IEC 9899:1990 with Amendment 1 or ISO/IEC 9899:1999.\r
+ of errno is not documented in the description of the function in\r
+ the governing standard: ISO/IEC 9899:1990 with Amendment 1 or ISO/IEC 9899:199409.\r
+\r
+ EFIerrno, like errno, should only be checked if it is known that the preceeding function call\r
+ called a UEFI function. Functions in which UEFI functions are called dependent upon context\r
+ or parameter values should guarantee that EFIerrno is set to zero by default, or to the status\r
+ value returned by any UEFI functions which are called.\r
\r
-Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>\r
-This program and the accompanying materials are licensed and made available under\r
-the terms and conditions of the BSD License that accompanies this distribution.\r
-The full text of the license may be found at\r
-http://opensource.org/licenses/bsd-license.php.\r
+ All macro definitions in this list must begin with the letter 'E'\r
+ and be followed by a digit or an uppercase letter.\r
\r
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+ Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r
+ This program and the accompanying materials are licensed and made available under\r
+ the terms and conditions of the BSD License that accompanies this distribution.\r
+ The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.\r
\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
**/\r
#ifndef _ERRNO_H\r
#define _ERRNO_H\r
\r
#define EMINERRORVAL __EMINERRORVAL /* The lowest valid error value */\r
\r
-#define EPERM __EPERM /* 1 Operation not permitted */\r
-#define ENOENT __ENOENT /* 2 No such file or directory */\r
-#define ESRCH __ESRCH /* 3 No such process */\r
-#define EINTR __EINTR /* 4 Interrupted system call */\r
-#define EIO __EIO /* 5 Input/output error */\r
-#define ENXIO __ENXIO /* 6 Device not configured */\r
-#define E2BIG __E2BIG /* 7 Argument list too long */\r
-#define ENOEXEC __ENOEXEC /* 8 Exec format error */\r
-#define EBADF __EBADF /* 9 Bad file descriptor */\r
-#define ECHILD __ECHILD /* 10 No child processes */\r
-#define EDEADLK __EDEADLK /* 11 Resource deadlock avoided */\r
-#define ENOMEM __ENOMEM /* 12 Cannot allocate memory */\r
-#define EACCES __EACCES /* 13 Permission denied */\r
-#define EFAULT __EFAULT /* 14 Bad address */\r
-#define ENOTBLK __ENOTBLK /* 15 Block device required */\r
-#define EBUSY __EBUSY /* 16 Device busy */\r
-#define EEXIST __EEXIST /* 17 File exists */\r
-#define EXDEV __EXDEV /* 18 Cross-device link */\r
-#define ENODEV __ENODEV /* 19 Operation not supported by device */\r
-#define ENOTDIR __ENOTDIR /* 20 Not a directory */\r
-#define EISDIR __EISDIR /* 21 Is a directory */\r
-#define EINVAL __EINVAL /* 22 Invalid argument */\r
-#define ENFILE __ENFILE /* 23 Too many open files in system */\r
-#define EMFILE __EMFILE /* 24 Too many open file descriptors */\r
-#define ENOTTY __ENOTTY /* 25 Inappropriate ioctl for device */\r
-#define ETXTBSY __ETXTBSY /* 26 Text file busy */\r
-#define EFBIG __EFBIG /* 27 File too large */\r
-#define ENOSPC __ENOSPC /* 28 No space left on device */\r
-#define ESPIPE __ESPIPE /* 29 Illegal seek */\r
-#define EROFS __EROFS /* 30 Read-only filesystem */\r
-#define EMLINK __EMLINK /* 31 Too many links */\r
-#define EPIPE __EPIPE /* 32 Broken pipe */\r
+#define EPERM __EPERM /* Operation not permitted */\r
+#define ENOENT __ENOENT /* No such file or directory */\r
+#define ESRCH __ESRCH /* No such process */\r
+#define EINTR __EINTR /* Interrupted system call */\r
+#define EIO __EIO /* Input/output error */\r
+#define ENXIO __ENXIO /* Device not configured */\r
+#define E2BIG __E2BIG /* Argument list too long */\r
+#define ENOEXEC __ENOEXEC /* Exec format error */\r
+#define EBADF __EBADF /* Bad file descriptor */\r
+#define ECHILD __ECHILD /* No child processes */\r
+#define EDEADLK __EDEADLK /* Resource deadlock avoided */\r
+#define ENOMEM __ENOMEM /* Cannot allocate memory */\r
+#define EACCES __EACCES /* Permission denied */\r
+#define EFAULT __EFAULT /* Bad address */\r
+#define ENOTBLK __ENOTBLK /* Block device required */\r
+#define EBUSY __EBUSY /* Device busy */\r
+#define EEXIST __EEXIST /* File exists */\r
+#define EXDEV __EXDEV /* Cross-device link */\r
+#define ENODEV __ENODEV /* Operation not supported by device */\r
+#define ENOTDIR __ENOTDIR /* Not a directory */\r
+#define EISDIR __EISDIR /* Is a directory */\r
+#define EINVAL __EINVAL /* Invalid argument */\r
+#define ENFILE __ENFILE /* Too many open files in system */\r
+#define EMFILE __EMFILE /* Too many open file descriptors */\r
+#define ENOTTY __ENOTTY /* Inappropriate ioctl for device */\r
+#define ETXTBSY __ETXTBSY /* Text file busy */\r
+#define EFBIG __EFBIG /* File too large */\r
+#define ENOSPC __ENOSPC /* No space left on device */\r
+#define ESPIPE __ESPIPE /* Illegal seek */\r
+#define EROFS __EROFS /* Read-only filesystem */\r
+#define EMLINK __EMLINK /* Too many links */\r
+#define EPIPE __EPIPE /* Broken pipe */\r
\r
/* math software -- these are the only two values required by the C Standard */\r
-#define EDOM __EDOM /* 33 Numerical argument out of domain */\r
-#define ERANGE __ERANGE /* 34 Result too large */\r
+#define EDOM __EDOM /* 3umerical argument out of domain */\r
+#define ERANGE __ERANGE /* 3esult too large */\r
\r
/* non-blocking and interrupt i/o */\r
#define EAGAIN __EAGAIN /* 35 Resource temporarily unavailable */\r
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