(split) LDP_man-pages: release ioctl.2 [JM:00378]

[linuxjm/LDP_man-pages.git] / draft / man3 / errno.3

.\" Copyright (c) 1996 Andries Brouwer (aeb@cwi.nl)
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
.\"
.\" The GNU General Public License's references to "object code"
.\" and "executables" are to be interpreted as the output of any
.\" document formatting or typesetting system, including
.\" intermediate and printed output.
.\"
.\" This manual is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public
.\" License along with this manual; if not, write to the Free
.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
.\" USA.
.\"
.\" 5 Oct 2002, Modified by Michael Kerrisk <mtk.manpages@gmail.com>
.\"     Updated for POSIX.1 2001
.\" 2004-12-17 Martin Schulze <joey@infodrom.org>, mtk
.\"     Removed errno declaration prototype, added notes
.\" 2006-02-09 Kurt Wall, mtk
.\"     Added non-POSIX errors
.\"
.\" Japanese Version Copyright (c) 1997 HIROFUMI Nishizuka
.\"     all rights reserved.
.\" Translated 1997-12-24, HIROFUMI Nishizuka <nishi@rpts.cl.nec.co.jp>
.\" Updated 1999-03-01, NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\" Updated 1999-08-21, NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\" Updated 2003-07-03, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2005-03-15, Akihiro MOTOKI
.\" Updated 2006-02-15, Akihiro MOTOKI, Catch up to LDP v2.23
.\" Updated 2006-07-14, Akihiro MOTOKI, Catch up to LDP v2.34
.\" Updated 2008-08-07, Akihiro MOTOKI, Catch up to LDP v3.05
.\"
.TH ERRNO 3 2008-07-09 "" "Linux Programmer's Manual"
.\"O .SH NAME
.SH ̾Á°
.\"O errno \- number of last error
errno \- ľ¶á¤ËȯÀ¸¤·¤¿¥¨¥é¡¼¤ÎÈÖ¹æ
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.B #include <errno.h>
.\".sp
.\".BI "extern int " errno ;
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O The
.\"O .I <errno.h>
.\"O header file defines the integer variable
.\"O .IR errno ,
.\"O which is set by system calls and some library functions in the event
.\"O of an error to indicate what went wrong.
.\"O Its value is significant only when the return value of
.\"O the call indicated an error
.\"O (i.e., \-1 from most system calls;
.\"O \-1 or NULL from most library functions);
.\"O a function that succeeds
.\"O .I is
.\"O allowed to change
.\"O .IR errno .
¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë
.I <errno.h>
¤ÇÀ°¿ô·¿¤ÎÊÑ¿ô
.I errno
¤¬ÄêµÁ¤µ¤ì¤Æ¤ª¤ê¡¢
¥·¥¹¥Æ¥à¥³¡¼¥ë¤ä¤¤¤¯¤Ä¤«¤Î¥é¥¤¥Ö¥é¥ê´Ø¿ô¤Ï¡¢¥¨¥é¡¼¤¬È¯À¸¤·¤¿ºÝ¤Ë
¤³¤ÎÊÑ¿ô¤Ë¤½¤Î¸¶°ø¤ò¼¨¤¹ÃͤòÀßÄꤹ¤ë¡£
¤³¤ÎÃͤϸƤӽФ·¤ÎÊÖ¤êÃͤ¬¥¨¥é¡¼ (¤Û¤È¤ó¤É¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ç¤Ï
\-1 ¤Ç¡¢¤Û¤È¤ó¤É¤Î¥é¥¤¥Ö¥é¥ê´Ø¿ô¤Ç¤Ï \-1 ¤« NULL) ¤ò¼¨¤·¤¿¤È¤­¤Ë
¤Î¤ß°ÕÌ£¤ò»ý¤Ä¤¬¡¢¥é¥¤¥Ö¥é¥ê´Ø¿ô¤ÏÀ®¸ù¤·¤¿¾ì¹ç¤â
.I errno
¤òÊѹ¹¤¹¤ë¤³¤È¤¬µö¤µ¤ì¤Æ¤¤¤ë¡£

.\"O Valid error numbers are all nonzero; \fIerrno\fP is never set to zero
.\"O by any system call or library function.
Í­¸ú¤Ê¥¨¥é¡¼ÈÖ¹æ¤Ï¤¤¤º¤ì¤â 0 °Ê³°¤ÎÃͤò»ý¤Ä¡£
¤É¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤â¥é¥¤¥Ö¥é¥ê´Ø¿ô¤â
\fIerrno\fP ¤ò 0 ¤ËÀßÄꤹ¤ë¤³¤È¤Ï¤Ê¤¤¡£

.\"O For some system calls and library functions (e.g.,
.\"O .BR getpriority (2)),
.\"O \-1 is a valid return on success.
.\"O In such cases, a successful return can be distinguished from an error
.\"O return by setting
.\"O .I errno
.\"O to zero before the call, and then,
.\"O if the call returns a status that indicates that an error
.\"O may have occurred, checking to see if
.\"O .I errno
.\"O has a nonzero value.
¤¤¤¯¤Ä¤«¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤ä¥é¥¤¥Ö¥é¥ê´Ø¿ô (Î㤨¤Ð
.BR getpriority (2))
¤Ç¤Ï¡¢À®¸ù¤·¤¿¾ì¹ç¤ÎÍ­¸ú¤ÊÊÖ¤êÃͤȤ·¤Æ \-1 ¤¬ÊÖ¤µ¤ì¤ë¤³¤È¤¬¤¢¤ë¡£
¤³¤Î¤è¤¦¤Ê¾ì¹ç¡¢À®¸ù¤Ê¤Î¤«¥¨¥é¡¼¤Ê¤Î¤«¤ò¶èÊ̤¹¤ë¤¿¤á¤Ë¤Ï¡¢
¸Æ¤Ó½Ð¤·¤ÎÁ°¤Ë
.I errno
¤ò 0 ¤ËÀßÄꤷ¤Æ¤ª¤±¤Ð¤è¤¤¡£¸Æ¤Ó½Ð¤·¤ÎÊÖ¤êÃͤ¬¥¨¥é¡¼È¯À¸¤Î²ÄǽÀ­¤ò
¼¨¤¹¤â¤Î¤À¤Ã¤¿¾ì¹ç¤Ë¤Ï¡¢
.I errno
¤¬ 0 °Ê³°¤ÎÃͤ«¤ò¸«¤Æ³Îǧ¤¹¤ì¤Ð¤è¤¤¡£

.\"O \fIerrno\fP is defined by the ISO C standard to be a modifiable lvalue
.\"O of type \fIint\fP, and must not be explicitly declared; \fIerrno\fP
.\"O may be a macro.
.\"O \fIerrno\fP is thread-local; setting it in one thread
.\"O does not affect its value in any other thread.
\fIerrno\fP ¤Ï¡¢ISO C standard ¤Ç \fIint\fP ·¿¤ÎÊѹ¹²Äǽ¤Êº¸ÊÕÃÍ
¤È¤·¤ÆÄêµÁ¤µ¤ì¤Æ¤ª¤ê¡¢ÌÀ¼¨Åª¤ËÀë¸À¤ò¹Ô¤Ã¤Æ¤Ï¤Ê¤é¤Ê¤¤;
\fIerrno\fP ¤Ï¥Þ¥¯¥í¤Î¾ì¹ç¤â¤¢¤ê¤¨¤ë¡£
\fIerrno\fP ¤Ï¥¹¥ì¥Ã¥ÉËè¤ËÃͤò»ý¤Ä¡£
¤Ä¤Þ¤ê¤¢¤ë¥¹¥ì¥Ã¥É¤Ç \fIerrno\fP ¤¬ÀßÄꤵ¤ì¤Æ¤â¡¢
¾¤Î¥¹¥ì¥Ã¥É¤Î \fIerrno\fP ¤Ë¤Ï±Æ¶Á¤·¤Ê¤¤¡£

.\"O All the error names specified by POSIX.1
.\"O must have distinct values, with the exception of
.\"O .B EAGAIN
.\"O and
.\"O .BR EWOULDBLOCK ,
.\"O which may be the same.
POSIX.1 ¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤ë¤¹¤Ù¤Æ¤Î¥¨¥é¡¼Ì¾¤Ë¤Ï¡¢
¤½¤ì¤¾¤ì°Û¤Ê¤ëÃͤ¬Âбþ¤·¤Æ¤¤¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
⤷¡¢
.B EAGAIN
¤È
.B EWOULDBLOCK
¤ÏÎã³°¤Ç¡¢¤³¤ì¤é¤ÏƱ¤¸Ãͤò»ý¤Ã¤Æ¤â¤è¤¤¡£

.\" The following is now
.\"O .\" POSIX.1 (2001 edition) lists the following symbolic error names.  Of
.\"O .\" these, \fBEDOM\fP and \fBERANGE\fP are in the ISO C standard.  ISO C
.\"O .\" Amendment 1 defines the additional error number \fBEILSEQ\fP for
.\"O .\" coding errors in multibyte or wide characters.
.\" POSIX.1 (2001 ǯÈÇ) ¤Ç¤Î¥¨¥é¡¼Ì¾¥·¥ó¥Ü¥ë¤Î¥ê¥¹¥È¤ò°Ê²¼¤Ë¼¨¤¹¡£
.\" ¤³¤ì¤é¤Î¤¦¤Á¡¢ \fBEDOM\fP ¤È \fBERANGE\fP ¤Ï ISO C standard ¤Ë¤¢¤ë¡£
.\" ¤µ¤é¤Ë¡¢ISO C Amendment 1 ¤Ç¤Ï¡¢¥¨¥é¡¼ÈÖ¹æ \fBEILSEQ\fP ¤¬
.\" ¥Þ¥ë¥Á¥Ð¥¤¥Èʸ»ú¤ä¥ï¥¤¥Éʸ»ú¤Ç¤ÎÉä¹æ²½¥¨¥é¡¼¤òɽ¤¹¤¿¤á¤Ë
.\" ÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£
.\"
.\"O Below is a list of the symbolic error names that are defined on Linux.
.\"O Some of these are marked
.\"O .IR POSIX.1 ,
.\"O indicating that the name is defined by POSIX.1-2001, or
.\"O .IR C99 ,
.\"O indicating that the name is defined by C99.
.TP 16
.B E2BIG
.\"O Argument list too long (POSIX.1)
°ú¤­¿ô¥ê¥¹¥È¤¬Ä¹²á¤®¤ë (POSIX.1)
.TP
.B EACCES
.\"O Permission denied (POSIX.1)
µö²Ä¤¬¤Ê¤¤ (POSIX.1)
.TP
.B EADDRINUSE
.\"O Address already in use (POSIX.1)
¥¢¥É¥ì¥¹¤¬¤¹¤Ç¤Ë»ÈÍѤµ¤ì¤Æ¤¤¤ë (POSIX.1)
.TP
.B EADDRNOTAVAIL
.\"O Address not available (POSIX.1)
¥¢¥É¥ì¥¹¤¬»ÈÍѤǤ­¤Ê¤¤ (POSIX.1)
.\"O .\" EADV is only an error on HURD(?)
.\" EADV ¤Ï HURD ¤Ë¤ª¤¤¤Æ¤À¤±¤Î¥¨¥é¡¼(?)
.TP
.B EAFNOSUPPORT
.\"O Address family not supported (POSIX.1)
¥¢¥É¥ì¥¹¡¦¥Õ¥¡¥ß¥ê¡¼¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤ (POSIX.1)
.TP
.B EAGAIN
.\"O Resource temporarily unavailable (may be the same value as
.\"O .BR EWOULDBLOCK )
.\"O (POSIX.1)
¥ê¥½¡¼¥¹¤¬°ì»þŪ¤ËÍøÍÑÉÔ²Ä
.RB ( EWOULDBLOCK
¤ÈƱ¤¸ÃͤǤâ¤è¤¤) (POSIX.1)
.TP
.B EALREADY
.\"O Connection already in progress (POSIX.1)
Àܳ¤¬´û¤Ë½èÍýÃæ¤Ç¤¢¤ë (POSIX.1)
.TP
.B EBADE
.\"O Invalid exchange
ÉÔÀµ¤Ê¤ä¤ê¼è¤ê (exchange) ¤Ç¤¢¤ë
.TP
.B EBADF
.\"O Bad file descriptor (POSIX.1)
¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¤¬ÉÔÀµ¤Ç¤¢¤ë (POSIX.1)
.TP
.B EBADFD
.\"O File descriptor in bad state
¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¤¬ÉÔÀµ¤Ê¾õÂ֤Ǥ¢¤ë
.TP
.B EBADMSG
.\"O Bad message (POSIX.1)
¥á¥Ã¥»¡¼¥¸¤¬ÉÔÀµ¤Ç¤¢¤ë (POSIX.1)
.TP
.B EBADR
.\"O Invalid request descriptor
ÉÔÀµ¤Ê¥ê¥¯¥¨¥¹¥È¥Ç¥£¥¹¥¯¥ê¥×¥¿
.TP
.B EBADRQC
.\"O Invalid request code
ÉÔÀµ¤Ê¥ê¥¯¥¨¥¹¥È¥³¡¼¥É
.TP
.B EBADSLT
.\"O Invalid slot
ÉÔÀµ¤Ê¥¹¥í¥Ã¥È
.\" EBFONT is defined but appears not to be used by kernel or glibc.
.TP
.B EBUSY
.\"O Device or resource busy (POSIX.1)
¥ê¥½¡¼¥¹¤¬»ÈÍÑÃæ¤Ç¤¢¤ë (POSIX.1)
.TP
.B ECANCELED
.\"O Operation canceled (POSIX.1)
Áàºî¤¬¥­¥ã¥ó¥»¥ë¤µ¤ì¤¿ (POSIX.1)
.TP
.B ECHILD
.\"O No child processes (POSIX.1)
»Ò¥×¥í¥»¥¹¤¬Ìµ¤¤ (POSIX.1)
.TP
.B ECHRNG
.\"O Channel number out of range
¥Á¥ã¥ó¥Í¥ëÈֹ椬Èϰϳ°¤Ç¤¢¤ë
.TP
.B ECOMM
.\"O Communication error on send
Á÷¿®»þ¤ËÄÌ¿®¥¨¥é¡¼¤¬È¯À¸¤·¤¿
.TP
.B ECONNABORTED
.\"O Connection aborted (POSIX.1)
Àܳ¤¬Ãæ»ß¤µ¤ì¤¿ (POSIX.1)
.TP
.B ECONNREFUSED
.\"O Connection refused (POSIX.1)
Àܳ¤¬µñÈݤµ¤ì¤¿ (POSIX.1)
.TP
.B ECONNRESET
.\"O Connection reset (POSIX.1)
Àܳ¤¬¥ê¥»¥Ã¥È¤µ¤ì¤¿ (POSIX.1)
.TP
.B EDEADLK
.\"O Resource deadlock avoided (POSIX.1)
¥ê¥½¡¼¥¹¤Î¥Ç¥Ã¥É¥í¥Ã¥¯¤ò²óÈò¤·¤¿ (POSIX.1)
.TP
.B EDEADLOCK
.\"O Synonym for
.\"O .B EDEADLK
.B EDEADLK
¤ÎƱµÁ¸ì
.TP
.B EDESTADDRREQ
.\"O Destination address required (POSIX.1)
°¸À襢¥É¥ì¥¹¤¬É¬ÍפǤ¢¤ë (POSIX.1)
.TP
.B EDOM
.\"O Mathematics argument out of domain of function (POSIX.1, C99)
¿ô³Ø´Ø¿ô¤Ç°ú¤­¿ô¤¬Îΰ賰¤Ç¤¢¤ë (out of domain)
.\" EDOTDOT is defined but appears to be unused
.TP
.B EDQUOT
.\" POSIX just says "Reserved"
.\"O Disk quota exceeded (POSIX.1)
¥Ç¥£¥¹¥¯¡¦¥¯¥©¡¼¥¿ (quota) ¤òĶ²á¤·¤¿ (POSIX.1)
.TP
.B EEXIST
.\"O File exists (POSIX.1)
¥Õ¥¡¥¤¥ë¤¬Â¸ºß¤¹¤ë (POSIX.1)
.TP
.B EFAULT
.\"O Bad address (POSIX.1)
¥¢¥É¥ì¥¹¤¬ÉÔÀµ¤Ç¤¢¤ë (POSIX.1)
.TP
.B EFBIG
.\"O File too large (POSIX.1)
¥Õ¥¡¥¤¥ë¤¬Â礭²á¤®¤ë (POSIX.1)
.TP
.B EHOSTDOWN
.\"O Host is down
¥Û¥¹¥È¤¬¥À¥¦¥ó¤·¤Æ¤¤¤ë
.TP
.B EHOSTUNREACH
.\"O Host is unreachable (POSIX.1)
¥Û¥¹¥È¤ËÅþãÉÔǽ¤Ç¤¢¤ë (POSIX.1)
.TP
.B EIDRM
.\"O Identifier removed (POSIX.1)
¼±Ê̻Ҥ¬ºï½ü¤µ¤ì¤¿ (POSIX.1)
.TP
.B EILSEQ
.\"O Illegal byte sequence (POSIX.1, C99)
ÉÔÀµ¤Ê¥Ð¥¤¥ÈÎó (POSIX.1, C99)
.TP
.B EINPROGRESS
.\"O Operation in progress (POSIX.1)
Áàºî¤¬¼Â¹ÔÃæ¤Ç¤¢¤ë (POSIX.1)
.TP
.B EINTR
.\"O Interrupted function call (POSIX.1); see
.\"O .BR signal (7).
´Ø¿ô¸Æ¤Ó½Ð¤·¤¬³ä¤ê¹þ¤Þ¤ì¤¿ (POSIX.1);
.BR signal (7)
»²¾È¡£
.TP
.B EINVAL
.\"O Invalid argument (POSIX.1)
°ú¿ô¤¬Ìµ¸ú¤Ç¤¢¤ë (POSIX.1)
.TP
.B EIO
.\"O Input/output error (POSIX.1)
Æþ½ÐÎÏ¥¨¥é¡¼ (POSIX.1)
.TP
.B EISCONN
.\"O Socket is connected (POSIX.1)
¥½¥±¥Ã¥È¤¬Àܳ¤µ¤ì¤Æ¤¤¤ë (POSIX.1)
.TP
.B EISDIR
.\"O Is a directory (POSIX.1)
¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤¢¤ë (POSIX.1)
.TP
.B EISNAM
.\"O Is a named type file
̾Á°ÉÕ¤­¤Î¥Õ¥¡¥¤¥ë¤Ç¤¢¤ë
.TP
.B EKEYEXPIRED
.\"O Key has expired
¸°¤¬´ü¸ÂÀÚ¤ì¤È¤Ê¤Ã¤¿
.TP
.B EKEYREJECTED
.\"O Key was rejected by service
¸°¤¬¥µ¡¼¥Ð¤Ë¤è¤êµñÈݤµ¤ì¤¿
.TP
.B EKEYREVOKED
.\"O Key has been revoked
¸°¤¬Ìµ¸ú¤È¤Ê¤Ã¤¿
.TP
.B EL2HLT
.\"O Level 2 halted
Ää»ß (¥ì¥Ù¥ë 2)
.TP
.B EL2NSYNC
.\"O Level 2 not synchronized
Ʊ´ü¤Ç¤­¤Æ¤¤¤Ê¤¤ (¥ì¥Ù¥ë 2)
.TP
.B EL3HLT
.\"O Level 3 halted
Ää»ß (¥ì¥Ù¥ë 3)
.TP
.B EL3RST
.\"O Level 3 halted
¥ê¥»¥Ã¥È (¥ì¥Ù¥ë 3)
.TP
.B ELIBACC
.\"O Cannot access a needed shared library
ɬÍפʶ¦Í­¥é¥¤¥Ö¥é¥ê¤Ë¥¢¥¯¥»¥¹¤Ç¤­¤Ê¤«¤Ã¤¿
.TP
.B ELIBBAD
.\"O Accessing a corrupted shared library
²õ¤ì¤¿¶¦Í­¥é¥¤¥Ö¥é¥ê¤Ë¥¢¥¯¥»¥¹¤·¤è¤¦¤È¤·¤¿
.TP
.B ELIBMAX
.\"O Attempting to link in too many shared libraries
¥ê¥ó¥¯¤·¤è¤¦¤È¤·¤¿¶¦Í­¥é¥¤¥Ö¥é¥ê¤¬Â¿²á¤®¤ë
.TP
.B ELIBSCN
.\"O lib section in a.out corrupted
a.out ¤Î¥é¥¤¥Ö¥é¥ê¥»¥¯¥·¥ç¥ó¤¬²õ¤ì¤Æ¤¤¤ë (corrupted)
.TP
.B ELIBEXEC
.\"O Cannot exec a shared library directly
¶¦Í­¥é¥¤¥Ö¥é¥ê¤òľÀܼ¹ԤǤ­¤Ê¤«¤Ã¤¿
.TP
.B ELOOP
.\"O Too many levels of symbolic links (POSIX.1)
¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯¤Î²ó¿ô¤¬Â¿²á¤®¤ë (POSIX.1)
.\" ELNRNG is defined but appears to be unused
.TP
.B EMEDIUMTYPE
.\"O Wrong medium type
´Ö°ã¤Ã¤¿¥á¥Ç¥£¥¢¼ïÊ̤Ǥ¢¤ë
.TP
.B EMFILE
.\"O Too many open files (POSIX.1)
¥ª¡¼¥×¥ó¤µ¤ì¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¤¬Â¿²á¤®¤ë (POSIX.1)
.TP
.B EMLINK
.\"O Too many links (POSIX.1)
¥ê¥ó¥¯¤¬Â¿²á¤®¤ë (POSIX.1)
.TP
.B EMSGSIZE
.\"O Message too long (POSIX.1)
¥á¥Ã¥»¡¼¥¸¤¬Ä¹²á¤®¤ë (POSIX.1)
.TP
.B EMULTIHOP
.\" POSIX says "Reserved"
.\"O Multihop attempted (POSIX.1)
¥Þ¥ë¥Á¥Û¥Ã¥× (multihop) ¤ò»î¤ß¤¿ (POSIX.1)
.TP
.B ENAMETOOLONG
.\"O Filename too long (POSIX.1)
¥Õ¥¡¥¤¥ë̾¤¬Ä¹²á¤®¤ë (POSIX.1)
.\" ENAVAIL is defined, but appears not to be used
.TP
.B ENETDOWN
.\"O Network is down (POSIX.1)
¥Í¥Ã¥È¥ï¡¼¥¯¤¬ÉÔÄ̤Ǥ¢¤ë (POSIX.1)
.TP
.B ENETRESET
.\"O Connection aborted by network (POSIX.1)
Àܳ¤¬¥Í¥Ã¥È¥ï¡¼¥¯Â¦¤«¤éÃæ»ß¤µ¤ì¤¿ (POSIX.1)
.TP
.B ENETUNREACH
.\"O Network unreachable (POSIX.1)
¥Í¥Ã¥È¥ï¡¼¥¯¤¬ÅþãÉÔǽ¤Ç¤¢¤ë (POSIX.1)
.TP
.B ENFILE
.\"O Too many open files in system (POSIX.1)
¥·¥¹¥Æ¥àÁ´ÂΤǥª¡¼¥×¥ó¤µ¤ì¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¤¬Â¿²á¤®¤ë (POSIX.1)
.\" ENOANO is defined but appears to be unused.
.TP
.B ENOBUFS
.\"O No buffer space available (POSIX.1 (XSI STREAMS option))
»ÈÍѲÄǽ¤Ê¥Ð¥Ã¥Õ¥¡¶õ´Ö¤¬¤Ê¤¤ (POSIX.1 (XSI STREAMS option))
.\" ENOCSI is defined but appears to be unused.
.TP
.B ENODATA
.\"O No message is available on the STREAM head read queue (POSIX.1)
¥¹¥È¥ê¡¼¥à¤ÎÆɤ߽Ф·¥­¥å¡¼¤ÎÀèƬ¤ËÆɤ߽Ф·²Äǽ¤Ê¥á¥Ã¥»¡¼¥¸¤¬¤Ê¤¤
(POSIX.1)
.TP
.B ENODEV
.\"O No such device (POSIX.1)
¤½¤Î¤è¤¦¤Ê¥Ç¥Ð¥¤¥¹¤Ï̵¤¤ (POSIX.1)
.TP
.B ENOENT
.\"O No such file or directory (POSIX.1)
¤½¤Î¤è¤¦¤Ê¥Õ¥¡¥¤¥ë¤ä¥Ç¥£¥ì¥¯¥È¥ê¤Ï̵¤¤ (POSIX.1)
.TP
.B ENOEXEC
.\"O Exec format error (POSIX.1)
¼Â¹Ô¥Õ¥¡¥¤¥ë·Á¼°¤Î¥¨¥é¡¼ (POSIX.1)
.TP
.B ENOKEY
.\"O Required key not available
Í׵ᤵ¤ì¤¿¸°¤¬ÍøÍѤǤ­¤Ê¤¤
.TP
.B ENOLCK
.\"O No locks available (POSIX.1)
ÍøÍѤǤ­¤ë¥í¥Ã¥¯¤¬Ìµ¤¤ (POSIX.1)
.TP
.B ENOLINK
.\" POSIX says "Reserved"
.\"O Link has been severed (POSIX.1)
¥ê¥ó¥¯¤¬ÀÚ¤ì¤Æ¤¤¤ë (POSIX.1)
.TP
.B ENOMEDIUM
.\"O No medium found
¥á¥Ç¥£¥¢¤¬¸«¤Ä¤«¤é¤Ê¤¤
.TP
.B ENOMEM
.\"O Not enough space (POSIX.1)
½½Ê¬¤Ê¶õ¤­¥á¥â¥êÎΰ褬̵¤¤ (POSIX.1)
.TP
.B ENOMSG
.\"O No message of the desired type (POSIX.1)
Í׵ᤵ¤ì¤¿·¿¤Î¥á¥Ã¥»¡¼¥¸¤¬Â¸ºß¤·¤Ê¤¤ (POSIX.1)
.TP
.B ENONET
.\"O Machine is not on the network
¥Þ¥·¥ó¤¬¥Í¥Ã¥È¥ï¡¼¥¯¾å¤Ë¤Ê¤¤
.TP
.B ENOPKG
.\"O Package not installed
¥Ñ¥Ã¥±¡¼¥¸¤¬¥¤¥ó¥¹¥È¡¼¥ë¤µ¤ì¤Æ¤¤¤Ê¤¤
.TP
.B ENOPROTOOPT
.\"O Protocol not available (POSIX.1)
»ØÄꤵ¤ì¤¿¥×¥í¥È¥³¥ë¤¬ÍøÍѤǤ­¤Ê¤¤ (POSIX.1)
.TP
.B ENOSPC
.\"O No space left on device (POSIX.1)
¥Ç¥Ð¥¤¥¹¤Ë¶õ¤­Îΰ褬̵¤¤ (POSIX.1)
.TP
.B ENOSR
.\"O No STREAM resources (POSIX.1 (XSI STREAMS option))
»ØÄꤵ¤ì¤¿¥¹¥È¥ê¡¼¥à¡¦¥ê¥½¡¼¥¹¤¬Â¸ºß¤·¤Ê¤¤ (POSIX.1 (XSI STREAMS option))
.TP
.B ENOSTR
.\"O Not a STREAM (POSIX.1 (XSI STREAMS option))
¥¹¥È¥ê¡¼¥à¤Ç¤Ï¤Ê¤¤ (POSIX.1 (XSI STREAMS option))
.TP
.B ENOSYS
.\"O Function not implemented (POSIX.1)
´Ø¿ô¤¬¼ÂÁõ¤µ¤ì¤Æ¤¤¤Ê¤¤ (POSIX.1)
.TP
.B ENOTBLK
.\"O Block device required
¥Ö¥í¥Ã¥¯¥Ç¥Ð¥¤¥¹¤¬É¬ÍפǤ¢¤ë
.TP
.B ENOTCONN
.\"O The socket is not connected (POSIX.1)
¥½¥±¥Ã¥È¤¬Àܳ¤µ¤ì¤Æ¤¤¤Ê¤¤ (POSIX.1)
.TP
.B ENOTDIR
.\"O Not a directory (POSIX.1)
¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤Ï¤Ê¤¤ (POSIX.1)
.TP
.B ENOTEMPTY
.\"O Directory not empty (POSIX.1)
¥Ç¥£¥ì¥¯¥È¥ê¤¬¶õ¤Ç¤Ï¤Ê¤¤ (POSIX.1)
.\" ENOTNAM is defined but appears to be unused.
.TP
.B ENOTSOCK
.\"O Not a socket (POSIX.1)
¥½¥±¥Ã¥È¤Ç¤Ï¤Ê¤¤ (POSIX.1)
.TP
.B ENOTSUP
.\"O Operation not supported (POSIX.1)
Áàºî¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤ (POSIX.1)
.TP
.B ENOTTY
.\"O Inappropriate I/O control operation (POSIX.1)
I/O À©¸æÁàºî¤¬Å¬ÀڤǤʤ¤ (POSIX.1)
.TP
.B ENOTUNIQ
.\"O Name not unique on network
̾Á°¤¬¥Í¥Ã¥È¥ï¡¼¥¯¤Ç°ì°Õ¤Ç¤Ï¤Ê¤¤
.TP
.B ENXIO
.\"O No such device or address (POSIX.1)
¤½¤Î¤è¤¦¤Ê¥Ç¥Ð¥¤¥¹¤ä¥¢¥É¥ì¥¹¤Ï¤Ê¤¤ (POSIX.1)
.TP
.B EOPNOTSUPP
.\"O Operation not supported on socket (POSIX.1)
¥½¥±¥Ã¥È¤Ç¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤Ê¤¤Áàºî¤Ç¤¢¤ë (POSIX.1)
.sp
.\"O .RB ( ENOTSUP
.\"O and
.\"O .B EOPNOTSUPP
.\"O have the same value on Linux, but
.\"O according to POSIX.1 these error values should be distinct.)
(Linux ¤Ç¤Ï
.B ENOTSUP
¤È
.B EOPNOTSUPP
¤ÏƱ¤¸Ãͤò»ý¤Ä¤¬¡¢
POSIX.1 ¤Ë½¾¤¨¤Ðξ¼Ô¤Î¥¨¥é¡¼Ãͤ϶èÊ̤µ¤ì¤ë¤Ù¤­¤Ç¤¢¤ë¡£)
.TP
.B EOVERFLOW
.\"O Value too large to be stored in data type (POSIX.1)
»ØÄꤵ¤ì¤¿¥Ç¡¼¥¿·¿¤Ë³ÊǼ¤¹¤ë¤Ë¤ÏÃͤ¬Â礭²á¤®¤ë (POSIX.1)
.TP
.B EPERM
.\"O Operation not permitted (POSIX.1)
Áàºî¤¬µö²Ä¤µ¤ì¤Æ¤¤¤Ê¤¤ (POSIX.1)
.TP
.B EPFNOSUPPORT
.\"O Protocol family not supported
¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤¥×¥í¥È¥³¥ë¥Õ¥¡¥ß¥ê¡¼¤Ç¤¢¤ë
.TP
.B EPIPE
.\"O Broken pipe (POSIX.1)
¥Ñ¥¤¥×¤¬²õ¤ì¤Æ¤¤¤ë (POSIX.1)
.TP
.B EPROTO
.\"O Protocol error (POSIX.1)
¥×¥í¥È¥³¥ë¡¦¥¨¥é¡¼ (POSIX.1)
.TP
.B EPROTONOSUPPORT
.\"O Protocol not supported (POSIX.1)
¥×¥í¥È¥³¥ë¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤ (POSIX.1)
.TP
.B EPROTOTYPE
.\"O Protocol wrong type for socket (POSIX.1)
¥½¥±¥Ã¥È¤Ë»ØÄê¤Ç¤­¤Ê¤¤¥×¥í¥È¥³¥ë¡¦¥¿¥¤¥×¤Ç¤¢¤ë (POSIX.1)
.TP
.B ERANGE
.\"O Result too large (POSIX.1, C99)
·ë²Ì¤¬Â礭²á¤®¤ë (POSIX.1, C99)
.TP
.B EREMCHG
.\"O Remote address changed
¥ê¥â¡¼¥È¥¢¥É¥ì¥¹¤¬ÊѤï¤Ã¤¿
.TP
.B EREMOTE
.\"O Object is remote
¥ª¥Ö¥¸¥§¥¯¥È¤¬¥ê¥â¡¼¥È¤Ë¤¢¤ë
.TP
.B EREMOTEIO
.\"O Remote I/O error
¥ê¥â¡¼¥È I/O ¥¨¥é¡¼
.TP
.B ERESTART
.\"O Interrupted system call should be restarted
¥·¥¹¥Æ¥à¥³¡¼¥ë¤¬ÃæÃǤµ¤ìºÆ¥¹¥¿¡¼¥È¤¬É¬ÍפǤ¢¤ë
.TP
.B EROFS
.\"O Read-only file system (POSIX.1)
Æɤ߽Ф·ÀìÍѤΥե¡¥¤¥ë¥·¥¹¥Æ¥à¤Ç¤¢¤ë (POSIX.1)
.TP
.B ESHUTDOWN
.\"O Cannot send after transport endpoint shutdown
ÄÌ¿®Áê¼ê¤¬¥·¥ã¥Ã¥È¥À¥¦¥ó¤µ¤ì¤ÆÁ÷¿®¤Ç¤­¤Ê¤¤
.TP
.B ESPIPE
.\"O Invalid seek (POSIX.1)
̵¸ú¤Ê¥·¡¼¥¯ (POSIX.1)
.TP
.B ESOCKTNOSUPPORT
.\"O Socket type not supported
¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤¥½¥±¥Ã¥È¼ïÊ̤Ǥ¢¤ë
.TP
.B ESRCH
.\"O No such process (POSIX.1)
¤½¤Î¤è¤¦¤Ê¥×¥í¥»¥¹¤Ï̵¤¤ (POSIX.1)
.\" ESRMNT is defined but appears not to be used
.TP
.B ESTALE
.\"O Stale file handle (POSIX.1)
¥Õ¥¡¥¤¥ë¥Ï¥ó¥É¥ë¤¬¸Å¤¤¾õÂ֤ˤʤäƤ¤¤ë (POSIX.1)
.sp
.\"O This error can occur for NFS and for other file systems
NFS ¤ä¾¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Çµ¯¤³¤ê¤¦¤ë¡£
.TP
.B ESTRPIPE
.\"O Streams pipe error
¥¹¥È¥ê¡¼¥à¡¦¥Ñ¥¤¥×¡¦¥¨¥é¡¼
.TP
.B ETIME
.\"O Timer expired
.\"O (POSIX.1 (XSI STREAMS option))
»þ´Ö¤¬·Ð²á¤·¤¿
(POSIX.1 (XSI STREAMS option))
.sp
.\"O (POSIX.1 says "STREAM
.\"O .BR ioctl (2)
.\"O timeout")
(POSIX.1 ¤Ç¤Ï "STREAM
.BR ioctl (2)
timeout" ¤È½ñ¤«¤ì¤Æ¤¤¤ë)
.TP
.B ETIMEDOUT
.\"O Connection timed out (POSIX.1)
Áàºî¤¬¥¿¥¤¥à¥¢¥¦¥È¤·¤¿ (POSIX.1)
.\" ETOOMANYREFS is defined, but appears not to be used.
.TP
.B ETXTBSY
.\"O Text file busy (POSIX.1)
¥Æ¥­¥¹¥È¥Õ¥¡¥¤¥ë¤¬»ÈÍÑÃæ¤Ç¤¢¤ë (POSIX.1)
.TP
.B EUCLEAN
.\"Omotoki: °ÕÌ£¤¬Ê¬¤«¤é¤Ê¤¤¤Î¤Ç¡¢¤½¤Î¤Þ¤Þ¸¶Ê¸¤ò»Ä¤·¤Æ¤¢¤ë¡£
.\"O Structure needs cleaning
Structure needs cleaning
.TP
.B EUNATCH
.\"O Protocol driver not attached
¥×¥í¥È¥³¥ë¤Î¥É¥é¥¤¥Ð¤¬ÉÕÍ¿ (attach) ¤µ¤ì¤Æ¤¤¤Ê¤¤
.TP
.B EUSERS
.\"O Too many users
¥æ¡¼¥¶¿ô¤¬Â¿²á¤®¤ë
.TP
.B EWOULDBLOCK
.\"O Operation would block (may be same value as
.\"O .BR EAGAIN )
.\"O (POSIX.1)
Áàºî¤¬¥Ö¥í¥Ã¥¯¤µ¤ì¤ë¸«¹þ¤ß¤Ç¤¢¤ë
.RB ( EAGAIN
¤ÈƱ¤¸ÃͤǤâ¤è¤¤) (POSIX.1)
.TP
.B EXDEV
.\"O Improper link (POSIX.1)
ÉÔŬÀڤʥê¥ó¥¯ (POSIX.1)
.TP
.B EXFULL
.\"O Exchange full
ÊÑ´¹¥Æ¡¼¥Ö¥ë¤¬°ìÇդǤ¢¤ë
.\"O .SH NOTES
.SH Ãí°Õ
.\"O A common mistake is to do
°Ê²¼¤Ï¤è¤¯¤ä¤ë´Ö°ã¤¤¤Ç¤¢¤ë¡£
.in +4n
.nf

if (somecall() == \-1) {
    printf("somecall() failed\en");
    if (errno == ...) { ... }
}

.fi
.in
.\"O where
.\"O .I errno
.\"O no longer needs to have the value it had upon return from
.\"O .IR somecall ()
.\"O (i.e., it may have been changed by the
.\"O .BR printf (3)).
¤³¤Î¤è¤¦¤Ë¤¹¤ë¤È¡¢»²¾È¤·¤Æ¤¤¤ë»þÅÀ¤Ç¤Ï
.I errno
¤Ï¤â¤Ï¤ä
.IR somecall ()
¤«¤éÊÖ¤µ¤ì¤¿ÃͤòÊÝ»ý¤·¤Æ¤¤¤ë¤È¤Ï¸Â¤é¤Ê¤¤
.RB ( printf (3)
¤Ë¤è¤êÊѹ¹¤µ¤ì¤Æ¤¤¤ë¤«¤â¤·¤ì¤Ê¤¤)¡£
.\"O If the value of
.\"O .I errno
.\"O should be preserved across a library call, it must be saved:
¥é¥¤¥Ö¥é¥ê¥³¡¼¥ë¤ò¤Þ¤¿¤¤¤Ç
.I errno
¤ÎÃͤòÊݸ¤·¤¿¤¤¾ì¹ç¤Ï¡¢°Ê²¼¤Î¤è¤¦¤ËÊݸ¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤:
.in +4n
.nf

if (somecall() == \-1) {
    int errsv = errno;
    printf("somecall() failed\en");
    if (errsv == ...) { ... }
}
.fi
.in
.PP
.\"O It was common in traditional C to declare
.\"O .I errno
.\"O manually
.\"O (i.e.,
.\"O .IR "extern int errno" )
.\"O instead of including
.\"O .IR <errno.h> .
.\"O .BR "Do not do this" .
.\"O It will not work with modern versions of the C library.
.\"O However, on (very) old UNIX systems, there may be no
.\"O .I <errno.h>
.\"O and the declaration is needed.
ÀΤΠC ¤Ç¤Ï¡¢
.I <errno.h>
¤ò¥¤¥ó¥¯¥ë¡¼¥É¤¹¤ë¤Î¤Ç¤Ï¤Ê¤¯
.I errno
¤ò¼êÆ°¤Ç
.RI ( "extern int errno"
¤Î¤è¤¦¤Ë) ÄêµÁ¤¹¤ë¤Î¤¬°ìÈÌŪ¤Ç¤¢¤Ã¤¿¡£
.BR "¤³¤Î¤è¤¦¤Ê¤³¤È¤Ï¤·¤Ê¤¤¤³¤È" "¡£"
¤³¤¦¤¹¤ë¤È¡¢ºÇ¶á¤Î¥Ð¡¼¥¸¥ç¥ó¤Î C ¥é¥¤¥Ö¥é¥ê¤Ç¤ÏÀµ¤·¤¯Æ°ºî¤·¤Ê¤¤¤À¤í¤¦¡£
¤·¤«¤·¡¢(Èó¾ï¤Ë) ¸Å¤¤ UNIX ¥·¥¹¥Æ¥à¤Ç¤Ï¡¢
.I <errno.h>
¤¬¤Ê¤¯¡¢Àë¸À¤¬É¬Íפʤ³¤È¤¬¤¢¤ë¤«¤â¤·¤ì¤Ê¤¤¡£
.\"O .SH "SEE ALSO"
.BR err (3),
.BR error (3),
.BR perror (3),
.BR strerror (3)