.\" 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@gmx.net>
.\" 	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
.\"
.TH ERRNO 3 2006-02-09 "" "Library functions"
.SH ̾
errno \- ľȯ顼ֹ
.SH 
.B #include <errno.h>
.\".sp
.\".BI "extern int " errno ;
.SH 
إåե
.I <errno.h>
ѿ
.B errno
Ƥꡢѿˤϡ
ƥॳڤӤĤΥ饤֥ؿˤ
顼ȯݤˤθ򼨤ͤꤵ롣
ͤϥ뤬顼 (̾ \-1) ֤ˤΤ̣߰Ĥ
饤֥ؿ
.B errno
ѹ뤳ȤƤ롣

ˤϡؿ֤ͭͤȤ \-1 ֤뤳Ȥ롣
Τ褦ʾ硢顼򸡽Ф뤿ˤϡƤӽФ
.B errno
 0 ˤƤɬפ롣

\fBerrno\fR ϡISO C standard  \fIint\fR ѹǽʺ
ȤƤꡢŪԤäƤϤʤʤ;
\fBerrno\fR ϥޥξ⤢ꤨ롣 \fBerrno\fR ϥå
ͤġĤޤꤢ륹åɤ \fBerrno\fR ꤵƤ⡢
¾Υåɤ \fBerrno\fR ˤϱƶʤ

ͭʥ顼ֹϤ 0 ʳͤġ
Ĥޤꡢ \fBerrno\fR  0 ꤹ饤֥ؿϤʤ
POSIX.1 Ƥ뤹٤ƤΥ顼̾ˤϡ
줾ۤʤͤбƤʤФʤʤ
â
.B EAGAIN

.B EWOULDBLOCK
㳰ǡƱͤäƤ褤

.\" The following is now 
.\" POSIX.1 (2001 ǯ) ǤΥ顼̾ܥΥꥹȤʲ˼
.\" Τ \fBEDOM\fR  \fBERANGE\fR  ISO C standard ˤ롣
.\" ˡISO C Amendment 1 Ǥϡ顼ֹ \fBEILSEQ\fR 
.\" ޥХʸ磻ʸǤ沽顼ɽ
.\" Ƥ롣
.\" 
.TP
.BR E2BIG
ꥹȤĹ᤮ (POSIX.1)
.TP
.BR EACCES
Ĥʤ (POSIX.1)
.TP
.BR EADDRINUSE
ɥ쥹Ǥ˻ѤƤ (POSIX.1)
.TP
.BR EADDRNOTAVAIL
ɥ쥹ѤǤʤ (POSIX.1)
.\" EADV  HURD ˤƤΥ顼(?)
.TP
.BR EAFNOSUPPORT
ɥ쥹եߥ꡼ݡȤƤʤ (POSIX.1)
.TP
.BR EAGAIN
꥽ŪԲ
.RB ( EWOULDBLOCK
ƱͤǤ褤) (POSIX.1)
.TP
.BR EALREADY
³˽Ǥ (POSIX.1)
.TP
.BR EBADE
ʤ (exchange) Ǥ
.TP
.BR EBADF
եǥץǤ (POSIX.1)
.TP
.BR EBADFD
եǥץʾ֤Ǥ
.TP
.BR EBADMSG
åǤ (POSIX.1)
.TP
.BR EBADR
ʥꥯȥǥץ
.TP
.BR EBADRQC
ʥꥯȥ
.TP
.BR EBADSLT
ʥå
.\" EBFONT is defined but appears not to be used by kernel or glibc.
.TP
.BR EBUSY
꥽Ǥ (POSIX.1)
.TP
.BR ECANCELED
󥻥뤵줿 (POSIX.1)
.TP
.BR ECHILD
ҥץ̵ (POSIX.1)
.TP
.B ECHRNG
ֹͥ椬ϰϳǤ
.TP
.B ECOMM
̿顼ȯ
.TP
.BR ECONNABORTED
³ߤ줿 (POSIX.1)
.TP
.BR ECONNREFUSED
³ݤ줿 (POSIX.1)
.TP
.BR ECONNRESET
³ꥻåȤ줿 (POSIX.1)
.TP
.BR EDEADLK
꥽Υǥåɥå򤷤 (POSIX.1)
.TP
.BR EDEADLOCK
.B EDEADLK
Ʊ
.TP
.BR EDESTADDRREQ
襢ɥ쥹ɬפǤ (POSIX.1)
.TP
.BR EDOM
شؿǰΰ賰Ǥ (out of domain)
.\" EDOTDOT is defined but appears to be unused
.TP
.BR EDQUOT
.\" POSIX just says "Reserved"
ǥ (quota) Ķᤷ (POSIX.1)
.TP
.BR EEXIST
ե뤬¸ߤ (POSIX.1)
.TP
.BR EFAULT
ɥ쥹Ǥ (POSIX.1)
.TP
.BR EFBIG
ե뤬礭᤮ (POSIX.1)
.TP
.BR EHOSTDOWN
ۥȤ󤷤Ƥ
.TP
.BR EHOSTUNREACH
ۥȤãǽǤ (POSIX.1)
.TP
.BR EIDRM
̻Ҥ줿 (POSIX.1)
.TP
.BR EILSEQ
ʥХ (POSIX.1, C99)
.TP
.BR EINPROGRESS
¹Ǥ (POSIX.1)
.TP
.BR EINTR
ؿƤӽФޤ줿 (POSIX.1)
.TP
.BR EINVAL
̵Ǥ (POSIX.1)
.TP
.BR EIO
ϥ顼 (POSIX.1)
.TP
.BR EISCONN
åȤ³Ƥ (POSIX.1)
.TP
.BR EISDIR
ǥ쥯ȥǤ (POSIX.1)
.TP
.BR EISNAM
̾դΥեǤ
.TP
.BR EKEYEXPIRED
ڤȤʤä
.TP
.BR EKEYREJECTED
Фˤݤ줿
.TP
.BR EKEYREVOKED
̵Ȥʤä
.TP
.B EL2HLT
 (٥ 2)
.TP
.B EL2NSYNC
ƱǤƤʤ (٥ 2)
.TP
.B EL3HLT
 (٥ 3)
.TP
.B EL3RST
ꥻå (٥ 3)
.TP
.BR ELIBACC
ɬפʶͭ饤֥˥Ǥʤä
.TP
.BR ELIBBAD
줿ͭ饤֥˥褦Ȥ
.TP
.BR ELIBMAX
󥯤褦Ȥͭ饤֥꤬¿᤮
.TP
.BR ELIBSCN
a.out Υ饤֥ꥻ󤬲Ƥ (corrupted)
.TP
.BR ELIBEXEC
ͭ饤֥ľܼ¹ԤǤʤä
.TP
.BR ELOOP
ܥå󥯤β¿᤮ (POSIX.1)
.\" ELNRNG is defined but appears to be unused
.TP
.BR EMEDIUMTYPE
ְäǥ̤Ǥ
.TP
.BR EMFILE
ץ󤵤Ƥե뤬¿᤮ (POSIX.1)
.TP
.BR EMLINK
󥯤¿᤮ (POSIX.1)
.TP
.BR EMSGSIZE
åĹ᤮ (POSIX.1)
.TP
.BR EMULTIHOP
.\" POSIX says "Reserved"
ޥۥå (multihop) ߤ (POSIX.1)
.TP
.BR ENAMETOOLONG
ե̾Ĺ᤮ (POSIX.1)
.\" ENAVAIL is defined, but appears not to be used
.TP
.BR ENETDOWN
ͥåȥ̤Ǥ (POSIX.1)
.TP
.BR ENETRESET
³ͥåȥ¦ߤ줿 (POSIX.1)
.TP
.BR ENETUNREACH
ͥåȥãǽǤ (POSIX.1)
.TP
.BR ENFILE
ƥΤǥץ󤵤Ƥե뤬¿᤮ (POSIX.1)
.\" ENOANO is defined but appears to be unused.
.TP
.BR ENOBUFS
ѲǽʥХåե֤ʤ (POSIX.1 (XSI STREAMS option))
.\" ENOCSI is defined but appears to be unused.
.TP
.BR ENODATA
ȥ꡼ɤ߽Ф塼Ƭɤ߽Фǽʥåʤ
(POSIX.1)
.TP
.BR ENODEV
Τ褦ʥǥХ̵ (POSIX.1)
.TP
.BR ENOENT
Τ褦ʥեǥ쥯ȥ̵ (POSIX.1)
.TP
.BR ENOEXEC
¹ԥեΥ顼 (POSIX.1)
.TP
.BR ENOKEY
׵ᤵ줿ѤǤʤ
.TP
.BR ENOLCK
ѤǤå̵ (POSIX.1)
.TP
.BR ENOLINK
.\" POSIX says "Reserved"
󥯤ڤƤ (POSIX.1)
.TP
.BR ENOMEDIUM
ǥĤʤ
.TP
.BR ENOMEM
ʬʶΰ褬̵ (POSIX.1)
.TP
.BR ENOMSG
׵ᤵ줿Υå¸ߤʤ (POSIX.1)
.TP
.BR ENONET
ޥ󤬥ͥåȥˤʤ
.TP
.BR ENOPKG
ѥå󥹥ȡ뤵Ƥʤ
.TP
.BR ENOPROTOOPT
ꤵ줿ץȥ뤬ѤǤʤ (POSIX.1)
.TP
.BR ENOSPC
ǥХ˶ΰ褬̵ (POSIX.1)
.TP
.BR ENOSR
ꤵ줿ȥ꡼ࡦ꥽¸ߤʤ (POSIX.1 (XSI STREAMS option))
.TP
.BR ENOSTR 
ȥ꡼ǤϤʤ (POSIX.1 (XSI STREAMS option))
.TP
.BR ENOSYS
ؿƤʤ (POSIX.1)
.TP
.BR ENOTBLK
֥åǥХɬפǤ
.TP
.BR ENOTCONN
åȤ³Ƥʤ (POSIX.1)
.TP
.BR ENOTDIR
ǥ쥯ȥǤϤʤ (POSIX.1)
.TP
.BR ENOTEMPTY
ǥ쥯ȥ꤬ǤϤʤ (POSIX.1)
.\" ENOTNAM is defined but appears to be unused.
.TP
.BR ENOTSOCK
åȤǤϤʤ (POSIX.1)
.TP
.BR ENOTSUP
ݡȤƤʤ (POSIX.1)
.TP
.BR ENOTTY
I/O ŬڤǤʤ (POSIX.1)
.TP
.BR ENOTUNIQ
̾ͥåȥǰդǤϤʤ
.TP
.BR ENXIO
Τ褦ʥǥХ䥢ɥ쥹Ϥʤ (POSIX.1)
.TP
.BR EOPNOTSUPP
åȤǥݡȤƤʤǤ (POSIX.1)
.sp
(Linux Ǥ ENOTSUP  EOPNOTSUPP ƱͤäƤ뤬
POSIX.1 ǤξԤΥ顼ͤ϶̤ɬפ롣)
.TP
.BR EOVERFLOW
ꤵ줿ǡ˳Ǽˤͤ礭᤮ (POSIX.1)
.TP
.BR EPERM
ĤƤʤ (POSIX.1)
.TP
.BR EPFNOSUPPORT
ݡȤƤʤץȥեߥ꡼Ǥ
.TP
.BR EPIPE
ѥפƤ (POSIX.1)
.TP
.BR EPROTO
ץȥ롦顼 (POSIX.1)
.TP
.BR EPROTONOSUPPORT
ץȥ뤬ݡȤƤʤ (POSIX.1)
.TP
.BR EPROTOTYPE
åȤ˻Ǥʤץȥ롦פǤ (POSIX.1)
.TP
.BR ERANGE
̤礭᤮ (POSIX.1, C99)
.TP
.BR EREMCHG
⡼ȥɥ쥹Ѥä
.TP
.BR EREMOTE
֥Ȥ⡼Ȥˤ
.TP
.BR EREMOTEIO
⡼ I/O 顼
.TP
.BR ERESTART
ƥॳ뤬ǤƥȤɬפǤ
.TP
.BR EROFS
ɤ߽ФѤΥե륷ƥǤ (POSIX.1)
.TP
.BR ESHUTDOWN
꤬̿åȥ󤵤Ǥʤ
.TP
.BR ESPIPE
̵ʥ (POSIX.1)
.TP
.BR ESOCKTNOSUPPORT
ݡȤƤʤåȼ̤Ǥ
.TP
.BR ESRCH
Τ褦ʥץ̵ (POSIX.1)
.\" ESRMNT is defined but appears not to be used
.TP
.BR ESTALE
եϥɥ뤬Ť֤ˤʤäƤ (POSIX.1)
.sp
NFS ¾Υե륷ƥǵꤦ롣
.TP
.BR ESTRPIPE
ȥ꡼ࡦѥס顼
.TP
.BR ETIME
֤вᤷ
(POSIX.1 (XSI STREAMS option))
.sp
(POSIX.1 Ǥ "STREAM
.BR ioctl ()
timeout" Ƚ񤫤Ƥ)
.TP
.BR ETIMEDOUT
ॢȤ (POSIX.1)
.\" ETOOMANYREFS is defined, but appears not to be used.
.TP
.BR ETXTBSY
ƥȥե뤬Ǥ (POSIX.1)
.TP
.BR EUCLEAN
.\"Omotoki: ̣ʬʤΤǡΤޤ޸ʸĤƤ롣
Structure needs cleaning
.TP
.BR EUNATCH
ץȥΥɥ饤ФͿ (attach) Ƥʤ
.TP
.BR EUSERS
桼¿᤮
.TP
.BR EWOULDBLOCK
֥å븫ߤǤ
.RB ( EAGAIN
ƱͤǤ褤) (POSIX.1)
.TP
.BR EXDEV
Ŭڤʥ (POSIX.1)
.TP
.B EXFULL
Ѵơ֥뤬դǤ
.SH 
ʲϤ褯ְ㤤Ǥ롣
.RS
.nf

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

.fi
.RE
Τ褦ˤȡȤƤǤ
.I errno
ϤϤ
.IR somecall ()
֤줿ͤݻƤȤϸ¤ʤ
.RB ( printf ()
ˤѹƤ뤫⤷ʤ)
饤֥ꥳޤ
.I errno
ͤ¸ϡʲΤ褦¸ʤФʤʤ:
.RS
.nf

if (somecall() == \-1) {
    int errsv = errno;
    printf("somecall() failed\en");
    if (errsv == ...) { ... }
}
.fi
.RE
.PP
Τ C Ǥϡ
.I <errno.h>
򥤥󥯥롼ɤΤǤϤʤ
.I errno
ư
.RI ( "extern int errno"
Τ褦) ΤŪǤä
.BR "Τ褦ʤȤϤʤ" ""
ȡǶΥС C 饤֥Ǥưʤ
() Ť Unix ƥǤϡ
.I <errno.h>
ʤɬפʤȤ뤫⤷ʤ
.BR err (3),
.BR error (3),
.BR perror (3),
.BR strerror (3)