Add strerror()

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@80 7fd9a85b-ad96-42d3-883c-3090e2eb8679

7 files changed, 501 insertions, 140 deletions

diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index c5e9f17c07..d2b64ea0d0 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -35,6 +35,7 @@
 0.1.2 2007-xx-xx  Gregory Nutt <spudmonkey@racsa.co.cr>
 
 	* Add dirent.h, opendir(), readdir(), closedir(), etc.
+	* Add strerror()
 	* Added 'ls' command to nsh
 	* Added C5471 watchdog driver
 	* Added support for the Neuros OSD / DM320
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index 5db2ce4e08..3f80f7bbad 100644
--- a/nuttx/Documentation/NuttX.html
+++ b/nuttx/Documentation/NuttX.html
@@ -396,6 +396,7 @@ Other memory:
 0.1.2 2007-xx-xx  Gregory Nutt <spudmonkey@racsa.co.cr>
 
 	* Add dirent.h, opendir(), readdir(), closedir(), etc.
+	* Add strerror()
 	* Added 'ls' command to nsh
 	* Added C5471 watchdog driver
 	* Added support for the Neuros OSD / DM320
diff --git a/nuttx/include/errno.h b/nuttx/include/errno.h
index 6f362cfc90..1291a2cffc 100644
--- a/nuttx/include/errno.h
+++ b/nuttx/include/errno.h
@@ -1,4 +1,4 @@
-/************************************************************
+/************************************************************************
  * errno.h
  *
  *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
@@ -31,154 +31,277 @@
  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- ************************************************************/
+ ************************************************************************/
 
 #ifndef __ERRNO_H
 #define __ERRNO_H
 
-/************************************************************
+/************************************************************************
  * Included Files
- ************************************************************/
+ ************************************************************************/
 
-/************************************************************
+/************************************************************************
  * Definitions
- ************************************************************/
+ ************************************************************************/
 
-#define	EPERM		 1	/* Operation not permitted */
-#define	ENOENT		 2	/* No such file or directory */
-#define	ESRCH		 3	/* No such process */
-#define	EINTR		 4	/* Interrupted system call */
-#define	EIO		 5	/* I/O error */
-#define	ENXIO		 6	/* No such device or address */
-#define	E2BIG		 7	/* Arg list too long */
-#define	ENOEXEC		 8	/* Exec format error */
-#define	EBADF		 9	/* Bad file number */
-#define	ECHILD		10	/* No child processes */
-#define	EAGAIN		11	/* Try again */
-#define	ENOMEM		12	/* Out of memory */
-#define	EACCES		13	/* Permission denied */
-#define	EFAULT		14	/* Bad address */
-#define	ENOTBLK		15	/* Block device required */
-#define	EBUSY		16	/* Device or resource busy */
-#define	EEXIST		17	/* File exists */
-#define	EXDEV		18	/* Cross-device link */
-#define	ENODEV		19	/* No such device */
-#define	ENOTDIR		20	/* Not a directory */
-#define	EISDIR		21	/* Is a directory */
-#define	EINVAL		22	/* Invalid argument */
-#define	ENFILE		23	/* File table overflow */
-#define	EMFILE		24	/* Too many open files */
-#define	ENOTTY		25	/* Not a typewriter */
-#define	ETXTBSY		26	/* Text file busy */
-#define	EFBIG		27	/* File too large */
-#define	ENOSPC		28	/* No space left on device */
-#define	ESPIPE		29	/* Illegal seek */
-#define	EROFS		30	/* Read-only file system */
-#define	EMLINK		31	/* Too many links */
-#define	EPIPE		32	/* Broken pipe */
-#define	EDOM		33	/* Math argument out of domain of func */
-#define	ERANGE		34	/* Math result not representable */
-#define	EDEADLK		35	/* Resource deadlock would occur */
-#define	ENAMETOOLONG	36	/* File name too long */
-#define	ENOLCK		37	/* No record locks available */
-#define	ENOSYS		38	/* Function not implemented */
-#define	ENOTEMPTY	39	/* Directory not empty */
-#define	ELOOP		40	/* Too many symbolic links encountered */
-#define	EWOULDBLOCK	EAGAIN	/* Operation would block */
-#define	ENOMSG		42	/* No message of desired type */
-#define	EIDRM		43	/* Identifier removed */
-#define	ECHRNG		44	/* Channel number out of range */
-#define	EL2NSYNC	45	/* Level 2 not synchronized */
-#define	EL3HLT		46	/* Level 3 halted */
-#define	EL3RST		47	/* Level 3 reset */
-#define	ELNRNG		48	/* Link number out of range */
-#define	EUNATCH		49	/* Protocol driver not attached */
-#define	ENOCSI		50	/* No CSI structure available */
-#define	EL2HLT		51	/* Level 2 halted */
-#define	EBADE		52	/* Invalid exchange */
-#define	EBADR		53	/* Invalid request descriptor */
-#define	EXFULL		54	/* Exchange full */
-#define	ENOANO		55	/* No anode */
-#define	EBADRQC		56	/* Invalid request code */
-#define	EBADSLT		57	/* Invalid slot */
+/* Definitions of error numbers and the string that would be
+ * returned by strerror().
+ */
 
-#define	EDEADLOCK	EDEADLK
+#define EPERM               1
+#define EPERM_STR           "Operation not permitted"
+#define ENOENT              2
+#define ENOENT_STR          "No such file or directory"
+#define ESRCH               3
+#define ESRCH_STR           "No such process"
+#define EINTR               4
+#define EINTR_STR           "Interrupted system call"
+#define EIO                 5
+#define EIO_STR             "I/O error"
+#define ENXIO               6
+#define ENXIO_STR           "No such device or address"
+#define E2BIG               7
+#define E2BIG_STR           "Arg list too long"
+#define ENOEXEC             8
+#define ENOEXEC_STR         "Exec format error"
+#define EBADF               9
+#define EBADF_STR           "Bad file number"
+#define ECHILD              10
+#define ECHILD_STR          "No child processes"
+#define EAGAIN              11
+#define EWOULDBLOCK         EAGAIN
+#define EAGAIN_STR          "Try again"
+#define ENOMEM              12
+#define ENOMEM_STR          "Out of memory"
+#define EACCES              13
+#define EACCES_STR          "Permission denied"
+#define EFAULT              14
+#define EFAULT_STR          "Bad address"
+#define ENOTBLK             15
+#define ENOTBLK_STR         "Block device required"
+#define EBUSY               16
+#define EBUSY_STR           "Device or resource busy"
+#define EEXIST              17
+#define EEXIST_STR          "File exists"
+#define EXDEV               18
+#define EXDEV_STR           "Cross-device link"
+#define ENODEV              19
+#define ENODEV_STR          "No such device"
+#define ENOTDIR             20
+#define ENOTDIR_STR         "Not a directory"
+#define EISDIR              21
+#define EISDIR_STR          "Is a directory"
+#define EINVAL              22
+#define EINVAL_STR          "Invalid argument"
+#define ENFILE              23
+#define ENFILE_STR          "File table overflow"
+#define EMFILE              24
+#define EMFILE_STR          "Too many open files"
+#define ENOTTY              25
+#define ENOTTY_STR          "Not a typewriter"
+#define ETXTBSY             26
+#define ETXTBSY_STR         "Text file busy"
+#define EFBIG               27
+#define EFBIG_STR           "File too large"
+#define ENOSPC              28
+#define ENOSPC_STR          "No space left on device"
+#define ESPIPE              29
+#define ESPIPE_STR          "Illegal seek"
+#define EROFS               30
+#define EROFS_STR           "Read-only file system"
+#define EMLINK              31
+#define EMLINK_STR          "Too many links"
+#define EPIPE               32
+#define EPIPE_STR           "Broken pipe"
+#define EDOM                33
+#define EDOM_STR            "Math argument out of domain of func"
+#define ERANGE              34
+#define ERANGE_STR          "Math result not representable"
+#define EDEADLK             35
+#define EDEADLOCK           EDEADLK
+#define EDEADLK_STR         "Resource deadlock would occur"
+#define ENAMETOOLONG        36
+#define ENAMETOOLONG_STR    "File name too long"
+#define ENOLCK              37
+#define ENOLCK_STR          "No record locks available"
+#define ENOSYS              38
+#define ENOSYS_STR          "Function not implemented"
+#define ENOTEMPTY           39
+#define ENOTEMPTY_STR       "Directory not empty"
+#define ELOOP               40
+#define ELOOP_STR           "Too many symbolic links encountered"
+#define ENOMSG              42
+#define ENOMSG_STR          "No message of desired type"
+#define EIDRM               43
+#define EIDRM_STR           "Identifier removed"
+#define ECHRNG              44
+#define ECHRNG_STR          "Channel number out of range"
+#define EL2NSYNC            45
+#define EL2NSYNC_STR        "Level 2 not synchronized"
+#define EL3HLT              46
+#define EL3HLT_STR          "Level 3 halted"
+#define EL3RST              47
+#define EL3RST_STR          "Level 3 reset"
+#define ELNRNG              48
+#define ELNRNG_STR          "Link number out of range"
+#define EUNATCH             49
+#define EUNATCH_STR         "Protocol driver not attached"
+#define ENOCSI              50
+#define ENOCSI_STR          "No CSI structure available"
+#define EL2HLT              51
+#define EL2HLT_STR          "Level 2 halted"
+#define EBADE               52
+#define EBADE_STR           "Invalid exchange"
+#define EBADR               53
+#define EBADR_STR           "Invalid request descriptor"
+#define EXFULL              54
+#define EXFULL_STR          "Exchange full"
+#define ENOANO              55
+#define ENOANO_STR          "No anode"
+#define EBADRQC             56
+#define EBADRQC_STR         "Invalid request code"
+#define EBADSLT             57
+#define EBADSLT_STR         "Invalid slot"
+#define EBFONT              59
+#define EBFONT_STR          "Bad font file format"
+#define ENOSTR              60
+#define ENOSTR_STR          "Device not a stream"
+#define ENODATA             61
+#define ENODATA_STR         "No data available"
+#define ETIME               62
+#define ETIME_STR           "Timer expired"
+#define ENOSR               63
+#define ENOSR_STR           "Out of streams resources"
+#define ENONET              64
+#define ENONET_STR          "Machine is not on the network"
+#define ENOPKG              65
+#define ENOPKG_STR          "Package not installed"
+#define EREMOTE             66
+#define EREMOTE_STR         "Object is remote"
+#define ENOLINK             67
+#define ENOLINK_STR         "Link has been severed"
+#define EADV                68
+#define EADV_STR            "Advertise error"
+#define ESRMNT              69
+#define ESRMNT_STR          "Srmount error"
+#define ECOMM               70
+#define ECOMM_STR           "Communication error on send"
+#define EPROTO              71
+#define EPROTO_STR          "Protocol error"
+#define EMULTIHOP           72
+#define EMULTIHOP_STR       "Multihop attempted"
+#define EDOTDOT             73
+#define EDOTDOT_STR         "RFS specific error"
+#define EBADMSG             74
+#define EBADMSG_STR         "Not a data message"
+#define EOVERFLOW           75
+#define EOVERFLOW_STR       "Value too large for defined data type"
+#define ENOTUNIQ            76
+#define ENOTUNIQ_STR        "Name not unique on network"
+#define EBADFD              77
+#define EBADFD_STR          "File descriptor in bad state"
+#define EREMCHG             78
+#define EREMCHG_STR         "Remote address changed"
+#define ELIBACC             79
+#define ELIBACC_STR         "Can not access a needed shared library"
+#define ELIBBAD             80
+#define ELIBBAD_STR         "Accessing a corrupted shared library"
+#define ELIBSCN             81
+#define ELIBSCN_STR         ".lib section in a.out corrupted"
+#define ELIBMAX             82
+#define ELIBMAX_STR         "Attempting to link in too many shared libraries"
+#define ELIBEXEC            83
+#define ELIBEXEC_STR        "Cannot exec a shared library directly"
+#define EILSEQ              84
+#define EILSEQ_STR          "Illegal byte sequence"
+#define ERESTART            85
+#define ERESTART_STR        "Interrupted system call should be restarted"
+#define ESTRPIPE            86
+#define ESTRPIPE_STR        "Streams pipe error"
+#define EUSERS              87
+#define EUSERS_STR          "Too many users"
+#define ENOTSOCK            88
+#define ENOTSOCK_STR        "Socket operation on non-socket"
+#define EDESTADDRREQ        89
+#define EDESTADDRREQ_STR    "Destination address required"
+#define EMSGSIZE            90
+#define EMSGSIZE_STR        "Message too long"
+#define EPROTOTYPE          91
+#define EPROTOTYPE_STR      "Protocol wrong type for socket"
+#define ENOPROTOOPT         92
+#define ENOPROTOOPT_STR     "Protocol not available"
+#define EPROTONOSUPPORT      93
+#define EPROTONOSUPPORT_STR "Protocol not supported"
+#define ESOCKTNOSUPPORT     94
+#define ESOCKTNOSUPPORT_STR "Socket type not supported"
+#define EOPNOTSUPP          95
+#define EOPNOTSUPP_STR      "Operation not supported on transport endpoint"
+#define EPFNOSUPPORT        96
+#define EPFNOSUPPORT_STR    "Protocol family not supported"
+#define EAFNOSUPPORT        97
+#define EAFNOSUPPORT_STR    "Address family not supported by protocol"
+#define EADDRINUSE          98
+#define EADDRINUSE_STR      "Address already in use"
+#define EADDRNOTAVAIL       99
+#define EADDRNOTAVAIL_STR   "Cannot assign requested address"
+#define ENETDOWN            100
+#define ENETDOWN_STR        "Network is down"
+#define ENETUNREACH         101
+#define ENETUNREACH_STR     "Network is unreachable"
+#define ENETRESET           102
+#define ENETRESET_STR       "Network dropped connection because of reset"
+#define ECONNABORTED        103
+#define ECONNABORTED_STR    "Software caused connection abort"
+#define ECONNRESET          104
+#define ECONNRESET_STR      "Connection reset by peer"
+#define ENOBUFS             105
+#define ENOBUFS_STR         "No buffer space available"
+#define EISCONN             106
+#define EISCONN_STR         "Transport endpoint is already connected"
+#define ENOTCONN            107
+#define ENOTCONN_STR        "Transport endpoint is not connected"
+#define ESHUTDOWN           108
+#define ESHUTDOWN_STR       "Cannot send after transport endpoint shutdown"
+#define ETOOMANYREFS        109
+#define ETOOMANYREFS_STR    "Too many references: cannot splice"
+#define ETIMEDOUT           110
+#define ETIMEDOUT_STR       "Connection timed out"
+#define ECONNREFUSED        111
+#define ECONNREFUSED_STR    "Connection refused"
+#define EHOSTDOWN           112
+#define EHOSTDOWN_STR       "Host is down"
+#define EHOSTUNREACH        113
+#define EHOSTUNREACH_STR    "No route to host"
+#define EALREADY            114
+#define EALREADY_STR        "Operation already in progress"
+#define EINPROGRESS         115
+#define EINPROGRESS_STR     "Operation now in progress"
+#define ESTALE              116
+#define ESTALE_STR          "Stale NFS file handle"
+#define EUCLEAN             117
+#define EUCLEAN_STR         "Structure needs cleaning"
+#define ENOTNAM             118
+#define ENOTNAM_STR         "Not a XENIX named type file"
+#define ENAVAIL             119
+#define ENAVAIL_STR         "No XENIX semaphores available"
+#define EISNAM              120
+#define EISNAM_STR          "Is a named type file"
+#define EREMOTEIO           121
+#define EREMOTEIO_STR       "Remote I/O error"
+#define EDQUOT              122
+#define EDQUOT_STR          "Quota exceeded"
+#define ENOMEDIUM           123
+#define ENOMEDIUM_STR       "No medium found"
+#define EMEDIUMTYPE         124
+#define EMEDIUMTYPE_STR     "Wrong medium type"
 
-#define	EBFONT		59	/* Bad font file format */
-#define	ENOSTR		60	/* Device not a stream */
-#define	ENODATA		61	/* No data available */
-#define	ETIME		62	/* Timer expired */
-#define	ENOSR		63	/* Out of streams resources */
-#define	ENONET		64	/* Machine is not on the network */
-#define	ENOPKG		65	/* Package not installed */
-#define	EREMOTE		66	/* Object is remote */
-#define	ENOLINK		67	/* Link has been severed */
-#define	EADV		68	/* Advertise error */
-#define	ESRMNT		69	/* Srmount error */
-#define	ECOMM		70	/* Communication error on send */
-#define	EPROTO		71	/* Protocol error */
-#define	EMULTIHOP	72	/* Multihop attempted */
-#define	EDOTDOT		73	/* RFS specific error */
-#define	EBADMSG		74	/* Not a data message */
-#define	EOVERFLOW	75	/* Value too large for defined data type */
-#define	ENOTUNIQ	76	/* Name not unique on network */
-#define	EBADFD		77	/* File descriptor in bad state */
-#define	EREMCHG		78	/* Remote address changed */
-#define	ELIBACC		79	/* Can not access a needed shared library */
-#define	ELIBBAD		80	/* Accessing a corrupted shared library */
-#define	ELIBSCN		81	/* .lib section in a.out corrupted */
-#define	ELIBMAX		82	/* Attempting to link in too many shared libraries */
-#define	ELIBEXEC	83	/* Cannot exec a shared library directly */
-#define	EILSEQ		84	/* Illegal byte sequence */
-#define	ERESTART	85	/* Interrupted system call should be restarted */
-#define	ESTRPIPE	86	/* Streams pipe error */
-#define	EUSERS		87	/* Too many users */
-#define	ENOTSOCK	88	/* Socket operation on non-socket */
-#define	EDESTADDRREQ	89	/* Destination address required */
-#define	EMSGSIZE	90	/* Message too long */
-#define	EPROTOTYPE	91	/* Protocol wrong type for socket */
-#define	ENOPROTOOPT	92	/* Protocol not available */
-#define	EPROTONOSUPPORT	93	/* Protocol not supported */
-#define	ESOCKTNOSUPPORT	94	/* Socket type not supported */
-#define	EOPNOTSUPP	95	/* Operation not supported on transport endpoint */
-#define	EPFNOSUPPORT	96	/* Protocol family not supported */
-#define	EAFNOSUPPORT	97	/* Address family not supported by protocol */
-#define	EADDRINUSE	98	/* Address already in use */
-#define	EADDRNOTAVAIL	99	/* Cannot assign requested address */
-#define	ENETDOWN	100	/* Network is down */
-#define	ENETUNREACH	101	/* Network is unreachable */
-#define	ENETRESET	102	/* Network dropped connection because of reset */
-#define	ECONNABORTED	103	/* Software caused connection abort */
-#define	ECONNRESET	104	/* Connection reset by peer */
-#define	ENOBUFS		105	/* No buffer space available */
-#define	EISCONN		106	/* Transport endpoint is already connected */
-#define	ENOTCONN	107	/* Transport endpoint is not connected */
-#define	ESHUTDOWN	108	/* Cannot send after transport endpoint shutdown */
-#define	ETOOMANYREFS	109	/* Too many references: cannot splice */
-#define	ETIMEDOUT	110	/* Connection timed out */
-#define	ECONNREFUSED	111	/* Connection refused */
-#define	EHOSTDOWN	112	/* Host is down */
-#define	EHOSTUNREACH	113	/* No route to host */
-#define	EALREADY	114	/* Operation already in progress */
-#define	EINPROGRESS	115	/* Operation now in progress */
-#define	ESTALE		116	/* Stale NFS file handle */
-#define	EUCLEAN		117	/* Structure needs cleaning */
-#define	ENOTNAM		118	/* Not a XENIX named type file */
-#define	ENAVAIL		119	/* No XENIX semaphores available */
-#define	EISNAM		120	/* Is a named type file */
-#define	EREMOTEIO	121	/* Remote I/O error */
-#define	EDQUOT		122	/* Quota exceeded */
-
-#define	ENOMEDIUM	123	/* No medium found */
-#define	EMEDIUMTYPE	124	/* Wrong medium type */
-
-/************************************************************
+/************************************************************************
  * Type Declarations
- ************************************************************/
+ ************************************************************************/
 
-/************************************************************
+/************************************************************************
  * Global Function Prototypes
- ************************************************************/
+ ************************************************************************/
 
 #undef EXTERN
 #if defined(__cplusplus)
diff --git a/nuttx/include/string.h b/nuttx/include/string.h
index 38163eb030..84c17cc39f 100644
--- a/nuttx/include/string.h
+++ b/nuttx/include/string.h
@@ -61,7 +61,7 @@ extern "C" {
 
 EXTERN char  *strchr(const char *s, int c);
 EXTERN FAR char *strdup(const char *s);
-EXTERN char  *strerror(int);
+EXTERN const char *strerror(int);
 EXTERN size_t strlen(const char *);
 EXTERN char  *strncat(char *, const char *, size_t);
 EXTERN int    strcmp(const char *, const char *);
diff --git a/nuttx/lib/Makefile b/nuttx/lib/Makefile
index 6d89ccaef7..a861d43a71 100644
--- a/nuttx/lib/Makefile
+++ b/nuttx/lib/Makefile
@@ -44,7 +44,7 @@ MISC_SRCS	= lib_init.c lib_streamsem.c lib_filesem.c
 STRING_SRCS	= lib_memset.c lib_memcpy.c lib_memcmp.c lib_memmove.c \
 		  lib_strcpy.c lib_strncpy.c lib_strcmp.c \
 		  lib_strlen.c lib_strdup.c lib_strtol.c lib_strchr.c \
-		  lib_strtok.c lib_strtokr.c
+		  lib_strtok.c lib_strtokr.c lib_strerror.c
 CTYPE_SRCS	= 
 STDIO_SRCS	= lib_fopen.c lib_fclose.c \
 		  lib_fread.c lib_libfread.c lib_fgetc.c lib_fgets.c lib_gets.c \
diff --git a/nuttx/lib/lib_strerror.c b/nuttx/lib/lib_strerror.c
new file mode 100644
index 0000000000..994af8d5bb
--- /dev/null
+++ b/nuttx/lib/lib_strerror.c
@@ -0,0 +1,236 @@
+/************************************************************************
+ * lib_strerror.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************/
+
+/************************************************************************
+ * Included Files
+ ************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <string.h>
+#include <errno.h>
+
+/************************************************************************
+ * Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Private Types
+ ************************************************************************/
+
+struct errno_strmap_s
+{
+  ubyte       errnum;
+  const char *str;
+};
+
+/************************************************************************
+ * Private Data
+ ************************************************************************/
+
+/* This table maps all error numbers to descriptive strings.
+ * The only assumption that the code makes with regard to this
+ * this table is that it is order by error number.
+ *
+ * The size of this table is quite large.  Its size can be
+ * reduced by eliminating some of the more obscure error
+ * strings.
+ */
+
+struct errno_strmap_s g_errnomap[] =
+{
+  { EPERM,               EPERM_STR           },
+  { ENOENT,              ENOENT_STR          },
+  { ESRCH,               ESRCH_STR           },
+  { EINTR,               EINTR_STR           },
+  { EIO,                 EIO_STR             },
+  { ENXIO,               ENXIO_STR           },
+  { E2BIG,               E2BIG_STR           },
+  { ENOEXEC,             ENOEXEC_STR         },
+  { EBADF,               EBADF_STR           },
+  { ECHILD,              ECHILD_STR          },
+  { EAGAIN,              EAGAIN_STR          },
+  { ENOMEM,              ENOMEM_STR          },
+  { EACCES,              EACCES_STR          },
+  { EFAULT,              EFAULT_STR          },
+  { ENOTBLK,             ENOTBLK_STR         },
+  { EBUSY,               EBUSY_STR           },
+  { EEXIST,              EEXIST_STR          },
+  { EXDEV,               EXDEV_STR           },
+  { ENODEV,              ENODEV_STR          },
+  { ENOTDIR,             ENOTDIR_STR         },
+  { EISDIR,              EISDIR_STR          },
+  { EINVAL,              EINVAL_STR          },
+  { ENFILE,              ENFILE_STR          },
+  { EMFILE,              EMFILE_STR          },
+  { ENOTTY,              ENOTTY_STR          },
+  { ETXTBSY,             ETXTBSY_STR         },
+  { EFBIG,               EFBIG_STR           },
+  { ENOSPC,              ENOSPC_STR          },
+  { ESPIPE,              ESPIPE_STR          },
+  { EROFS,               EROFS_STR           },
+  { EMLINK,              EMLINK_STR          },
+  { EPIPE,               EPIPE_STR           },
+  { EDOM,                EDOM_STR            },
+  { ERANGE,              ERANGE_STR          },
+  { EDEADLK,             EDEADLK_STR         },
+  { ENAMETOOLONG,        ENAMETOOLONG_STR    },
+  { ENOLCK,              ENOLCK_STR          },
+  { ENOSYS,              ENOSYS_STR          },
+  { ENOTEMPTY,           ENOTEMPTY_STR       },
+  { ELOOP,               ELOOP_STR           },
+  { ENOMSG,              ENOMSG_STR          },
+  { EIDRM,               EIDRM_STR           },
+  { ECHRNG,              ECHRNG_STR          },
+  { EL2NSYNC,            EL2NSYNC_STR        },
+  { EL3HLT,              EL3HLT_STR          },
+  { EL3RST,              EL3RST_STR          },
+  { ELNRNG,              ELNRNG_STR          },
+  { EUNATCH,             EUNATCH_STR         },
+  { ENOCSI,              ENOCSI_STR          },
+  { EL2HLT,              EL2HLT_STR          },
+  { EBADE,               EBADE_STR           },
+  { EBADR,               EBADR_STR           },
+  { EXFULL,              EXFULL_STR          },
+  { ENOANO,              ENOANO_STR          },
+  { EBADRQC,             EBADRQC_STR         },
+  { EBADSLT,             EBADSLT_STR         },
+  { EBFONT,              EBFONT_STR          },
+  { ENOSTR,              ENOSTR_STR          },
+  { ENODATA,             ENODATA_STR         },
+  { ETIME,               ETIME_STR           },
+  { ENOSR,               ENOSR_STR           },
+  { ENONET,              ENONET_STR          },
+  { ENOPKG,              ENOPKG_STR          },
+  { EREMOTE,             EREMOTE_STR         },
+  { ENOLINK,             ENOLINK_STR         },
+  { EADV,                EADV_STR            },
+  { ESRMNT,              ESRMNT_STR          },
+  { ECOMM,               ECOMM_STR           },
+  { EPROTO,              EPROTO_STR          },
+  { EMULTIHOP,           EMULTIHOP_STR       },
+  { EDOTDOT,             EDOTDOT_STR         },
+  { EBADMSG,             EBADMSG_STR         },
+  { EOVERFLOW,           EOVERFLOW_STR       },
+  { ENOTUNIQ,            ENOTUNIQ_STR        },
+  { EBADFD,              EBADFD_STR          },
+  { EREMCHG,             EREMCHG_STR         },
+  { ELIBACC,             ELIBACC_STR         },
+  { ELIBBAD,             ELIBBAD_STR         },
+  { ELIBSCN,             ELIBSCN_STR         },
+  { ELIBMAX,             ELIBMAX_STR         },
+  { ELIBEXEC,            ELIBEXEC_STR        },
+  { EILSEQ,              EILSEQ_STR          },
+  { ERESTART,            ERESTART_STR        },
+  { ESTRPIPE,            ESTRPIPE_STR        },
+  { EUSERS,              EUSERS_STR          },
+  { ENOTSOCK,            ENOTSOCK_STR        },
+  { EDESTADDRREQ,        EDESTADDRREQ_STR    },
+  { EMSGSIZE,            EMSGSIZE_STR        },
+  { EPROTOTYPE,          EPROTOTYPE_STR      },
+  { ENOPROTOOPT,         ENOPROTOOPT_STR     },
+  { EPROTONOSUPPORT,     EPROTONOSUPPORT_STR },
+  { ESOCKTNOSUPPORT,     ESOCKTNOSUPPORT_STR },
+  { EOPNOTSUPP,          EOPNOTSUPP_STR      },
+  { EPFNOSUPPORT,        EPFNOSUPPORT_STR    },
+  { EAFNOSUPPORT,        EAFNOSUPPORT_STR    },
+  { EADDRINUSE,          EADDRINUSE_STR      },
+  { EADDRNOTAVAIL,       EADDRNOTAVAIL_STR   },
+  { ENETDOWN,            ENETDOWN_STR        },
+  { ENETUNREACH,         ENETUNREACH_STR     },
+  { ENETRESET,           ENETRESET_STR       },
+  { ECONNABORTED,        ECONNABORTED_STR    },
+  { ECONNRESET,          ECONNRESET_STR      },
+  { ENOBUFS,             ENOBUFS_STR         },
+  { EISCONN,             EISCONN_STR         },
+  { ENOTCONN,            ENOTCONN_STR        },
+  { ESHUTDOWN,           ESHUTDOWN_STR       },
+  { ETOOMANYREFS,        ETOOMANYREFS_STR    },
+  { ETIMEDOUT,           ETIMEDOUT_STR       },
+  { ECONNREFUSED,        ECONNREFUSED_STR    },
+  { EHOSTDOWN,           EHOSTDOWN_STR       },
+  { EHOSTUNREACH,        EHOSTUNREACH_STR    },
+  { EALREADY,            EALREADY_STR        },
+  { EINPROGRESS,         EINPROGRESS_STR     },
+  { ESTALE,              ESTALE_STR          },
+  { EUCLEAN,             EUCLEAN_STR         },
+  { ENOTNAM,             ENOTNAM_STR         },
+  { ENAVAIL,             ENAVAIL_STR         },
+  { EISNAM,              EISNAM_STR          },
+  { EREMOTEIO,           EREMOTEIO_STR       },
+  { EDQUOT,              EDQUOT_STR          },
+  { ENOMEDIUM,           ENOMEDIUM_STR       },
+  { EMEDIUMTYPE,         EMEDIUMTYPE_STR     }
+};
+
+#define NERRNO_STRS (sizeof(g_errnomap) / sizeof(struct errno_strmap_s))
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: strerror
+ ************************************************************************/
+
+const char *strerror(int errnum)
+{
+  int ndxlow = 0;
+  int ndxhi  = NERRNO_STRS - 1;
+  int ndxmid;
+
+  do
+    {
+      ndxmid = (ndxlow + ndxhi) >> 1;
+      if (errnum > g_errnomap[ndxmid].errnum)
+        {
+          ndxlow = ndxmid + 1;
+        }
+      else if (errnum < g_errnomap[ndxmid].errnum)
+        {
+          ndxhi = ndxmid - 1;
+        }
+      else
+        {
+          return g_errnomap[ndxmid].str;
+        }
+    }
+  while (ndxlow <= ndxhi);
+  return "Unknown error";
+}
diff --git a/nuttx/sched/os_start.c b/nuttx/sched/os_start.c
index 2c5da51a2b..30a8cb5873 100644
--- a/nuttx/sched/os_start.c
+++ b/nuttx/sched/os_start.c
@@ -264,7 +264,7 @@ void os_start(void)
 
   /* Then add the idle task's TCB to the head of the ready to run list */
 
-  dq_addfirst((FAR dq_entry_t*)&g_idletcb, &g_readytorun);
+  dq_addfirst((FAR dq_entry_t*)&g_idletcb, (dq_queue_t*)&g_readytorun);
 
   /* Initialize the processor-specific portion of the TCB */
 
@@ -435,7 +435,7 @@ void os_start(void)
               /* Remove the first delayed deallocation. */
 
               irqstate_t saved_state = irqsave();
-              void *address          = (void*)sq_remfirst(&g_delayeddeallocations);
+              void *address = (void*)sq_remfirst((sq_queue_t*)&g_delayeddeallocations);
               irqrestore(saved_state);
 
               /* Then deallocate it */