errno EFTYPE

include/errno.h

@@ -77,6 +77,7 @@ extern int errno;		  /* place where the error numbers go */
 #define ERESTART      (_SIGN 41)  /* service restarted */
 #define EIDRM         (_SIGN 43)  /* Identifier removed */
 #define EILSEQ        (_SIGN 44)  /* illegal byte sequence */
+#define EFTYPE        (_SIGN 45)  /* wrong file format or type */
 
 /* The following errors relate to networking. */
 #define EPACKSIZE     (_SIGN 50)  /* invalid packet size for some protocol */

lib/libc/ansi/errlist.c

@@ -52,7 +52,7 @@ const char *_sys_errlist[] = {
 	unknown,			/* 42 */
 	"Identifier removed",		/* EIDRM */
 	"Illegal byte sequence",	/* EILSEQ */
-	unknown,			/* 45 */
+	"Wrong file format or type",	/* EFTYPE */
 	unknown,			/* 46 */
 	unknown,			/* 47 */
 	unknown,			/* 48 */

man/man2/intro.2

@@ -232,6 +232,7 @@ A path name lookup involved too many symbolic links.
 .en 41 ERESTART "Service restarted
 .en 43 EIDRM "Identifier removed
 .en 44 EILSEQ "Illegal byte sequence
+.en 45 EFTYPE "Wrong file format or type
 .en 50 EPACKSIZE "Invalid packet size
 .en 51 ENOBUFS "Not enough buffers left
 .en 52 EBADIOCTL "Illegal ioctl for device