errno.h(0p)

1<errno.h>(0P)              POSIX Programmer's Manual             <errno.h>(0P)
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NAME

6       errno.h - system error numbers
7

SYNOPSIS

9       #include <errno.h>
10

DESCRIPTION

12       Some  of the functionality described on this reference page extends the
13       ISO C standard. Any conflict between the  requirements  described  here
14       and   the   ISO C   standard   is   unintentional.    This   volume  of
15       IEEE Std 1003.1-2001 defers to the ISO C standard.
16
17       The ISO C standard only requires  the  symbols  [EDOM],  [EILSEQ],  and
18       [ERANGE] to be defined.
19
20       The  <errno.h>  header  shall  provide a declaration for errno and give
21       positive values for the  following  symbolic  constants.  Their  values
22       shall be unique except as noted below.
23
24       E2BIG  Argument list too long.
25
26       EACCES Permission denied.
27
28       EADDRINUSE
29              Address in use.
30
31       EADDRNOTAVAIL
32              Address not available.
33
34       EAFNOSUPPORT
35              Address family not supported.
36
37       EAGAIN Resource  unavailable,  try  again  (may  be  the  same value as
38              [EWOULDBLOCK]).
39
40       EALREADY
41              Connection already in progress.
42
43       EBADF  Bad file descriptor.
44
45       EBADMSG
46              Bad message.
47
48       EBUSY  Device or resource busy.
49
50       ECANCELED
51              Operation canceled.
52
53       ECHILD No child processes.
54
55       ECONNABORTED
56              Connection aborted.
57
58       ECONNREFUSED
59              Connection refused.
60
61       ECONNRESET
62              Connection reset.
63
64       EDEADLK
65              Resource deadlock would occur.
66
67       EDESTADDRREQ
68              Destination address required.
69
70       EDOM   Mathematics argument out of domain of function.
71
72       EDQUOT Reserved.
73
74       EEXIST File exists.
75
76       EFAULT Bad address.
77
78       EFBIG  File too large.
79
80       EHOSTUNREACH
81              Host is unreachable.
82
83       EIDRM  Identifier removed.
84
85       EILSEQ Illegal byte sequence.
86
87       EINPROGRESS
88              Operation in progress.
89
90       EINTR  Interrupted function.
91
92       EINVAL Invalid argument.
93
94       EIO    I/O error.
95
96       EISCONN
97              Socket is connected.
98
99       EISDIR Is a directory.
100
101       ELOOP  Too many levels of symbolic links.
102
103       EMFILE Too many open files.
104
105       EMLINK Too many links.
106
107       EMSGSIZE
108              Message too large.
109
110       EMULTIHOP
111              Reserved.
112
113       ENAMETOOLONG
114              Filename too long.
115
116       ENETDOWN
117              Network is down.
118
119       ENETRESET
120              Connection aborted by network.
121
122       ENETUNREACH
123              Network unreachable.
124
125       ENFILE Too many files open in system.
126
127       ENOBUFS
128              No buffer space available.
129
130       ENODATA
131              No message is available on the STREAM head read queue.
132
133       ENODEV No such device.
134
135       ENOENT No such file or directory.
136
137       ENOEXEC
138              Executable file format error.
139
140       ENOLCK No locks available.
141
142       ENOLINK
143              Reserved.
144
145       ENOMEM Not enough space.
146
147       ENOMSG No message of the desired type.
148
149       ENOPROTOOPT
150              Protocol not available.
151
152       ENOSPC No space left on device.
153
154       ENOSR  No STREAM resources.
155
156       ENOSTR Not a STREAM.
157
158       ENOSYS Function not supported.
159
160       ENOTCONN
161              The socket is not connected.
162
163       ENOTDIR
164              Not a directory.
165
166       ENOTEMPTY
167              Directory not empty.
168
169       ENOTSOCK
170              Not a socket.
171
172       ENOTSUP
173              Not supported.
174
175       ENOTTY Inappropriate I/O control operation.
176
177       ENXIO  No such device or address.
178
179       EOPNOTSUPP
180              Operation not supported on socket.
181
182       EOVERFLOW
183              Value too large to be stored in data type.
184
185       EPERM  Operation not permitted.
186
187       EPIPE  Broken pipe.
188
189       EPROTO Protocol error.
190
191       EPROTONOSUPPORT
192
193              Protocol not supported.
194
195       EPROTOTYPE
196              Protocol wrong type for socket.
197
198       ERANGE Result too large.
199
200       EROFS  Read-only file system.
201
202       ESPIPE Invalid seek.
203
204       ESRCH  No such process.
205
206       ESTALE Reserved.
207
208       ETIME  Stream ioctl() timeout.
209
210       ETIMEDOUT
211              Connection timed out.
212
213       ETXTBSY
214              Text file busy.
215
216       EWOULDBLOCK
217              Operation would block (may be the same value as [EAGAIN]).
218
219       EXDEV  Cross-device link.
220
221
222       The following sections are informative.
223

APPLICATION USAGE

225       Additional error numbers may be defined on conforming systems; see  the
226       System Interfaces volume of IEEE Std 1003.1-2001.
227

RATIONALE

229       None.
230

FUTURE DIRECTIONS

232       None.
233

COPYRIGHT

239       Portions of this text are reprinted and reproduced in  electronic  form
240       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
241       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
242       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
243       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
244       event of any discrepancy between this version and the original IEEE and
245       The Open Group Standard, the original IEEE and The Open Group  Standard
246       is  the  referee document. The original Standard can be obtained online
247       at http://www.opengroup.org/unix/online.html .
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251IEEE/The Open Group                  2003                        <errno.h>(0P)