projects / apple / xnu.git / blame
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1 | .\" |
| 2 | .\" Copyright (c) 2012 Apple Inc. All rights reserved. | |
| 3 | .\" | |
| 4 | .\" @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
| 5 | .\" | |
| 6 | .\" This file contains Original Code and/or Modifications of Original Code | |
| 7 | .\" as defined in and that are subject to the Apple Public Source License | |
| 8 | .\" Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | .\" compliance with the License. The rights granted to you under the License | |
| 10 | .\" may not be used to create, or enable the creation or redistribution of, | |
| 11 | .\" unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | .\" circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | .\" terms of an Apple operating system software license agreement. | |
| 14 | .\" | |
| 15 | .\" Please obtain a copy of the License at | |
| 16 | .\" http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | .\" | |
| 18 | .\" The Original Code and all software distributed under the License are | |
| 19 | .\" distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 20 | .\" EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 21 | .\" INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 22 | .\" FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 23 | .\" Please see the License for the specific language governing rights and | |
| 24 | .\" limitations under the License. | |
| 25 | .\" | |
| 26 | .\" @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
| 27 | .\" | |
| 28 | .Dd November 14, 2012 | |
| 29 | .Dt PEELOFF 2 | |
| 30 | .Os Darwin | |
| 31 | .Sh NAME | |
| 32 | .Nm peeloff | |
| 33 | .Nd extracts an association from a socket | |
| 34 | .Sh SYNOPSIS | |
| 35 | .Fd #include <sys/socket.h> | |
| 36 | .Ft int | |
| 37 | .Fo peeloff | |
| 38 | .Fa "int socket" | |
| 39 | .Fa "associd_t associd" | |
| 40 | .Fc | |
| 41 | .Sh DESCRIPTION | |
| 42 | The parameter | |
| 43 | .Fa socket | |
| 44 | is a socket. The communication domain of the socket determines the | |
| 45 | availability and behavior of | |
| 46 | .Fn peeloff . | |
| 47 | In general, | |
| 48 | .Fn peeloff | |
| 49 | attempts to extract the association specified by | |
| 50 | .Fa associd | |
| 51 | into its own separate socket. | |
| 52 | .Pp | |
| 53 | The parameter | |
| 54 | .Fa associd | |
| 55 | specifies the association identifier. It may be set to | |
| 56 | .Dv ASSOCID_ANY | |
| 57 | when there is only one association present; or one of the identifiers | |
| 58 | returned from | |
| 59 | .Xr getassocids 3 . | |
| 60 | .Sh RETURN VALUES | |
| 61 | The | |
| 62 | .Fn peeloff | |
| 63 | function returns -1 on error and the global variable | |
| 64 | .Va errno | |
| 65 | is set to indicate the error. If it succeeds, it returns a non-negative | |
| 66 | integer that is a descriptor for the extracted association. | |
| 67 | .Sh ERRORS | |
| 68 | The | |
| 69 | .Fn peeloff | |
| 70 | system call succeeds unless: | |
| 71 | .Bl -tag -width Er | |
| 72 | .\" =========== | |
| 73 | .It Bq Er EBADF | |
| 74 | .Fa Socket | |
| 75 | is not a valid descriptor. | |
| 76 | .\" =========== | |
| 77 | .It Bq Er EINVAL | |
| 78 | The | |
| 79 | .Fa associd | |
| 80 | argument is invalid; cannot be extracted; or the underlying protocol | |
| 81 | is no longer attached to | |
| 82 | .Fa socket . | |
| 83 | .\" =========== | |
| 84 | .It Bq Er ENOTSOCK | |
| 85 | .Fa Socket | |
| 86 | is a file, not a socket. | |
| 87 | .El | |
| 88 | .Sh SEE ALSO | |
| 89 | .Xr connectx 2 , | |
| 90 | .Xr disconnectx 2 , | |
| 91 | .Xr socket 2 , | |
| 92 | .Xr getassocids 3 , | |
| 93 | .Xr getconnids 3 , | |
| 94 | .Xr getconninfo 3 , | |
| 95 | .Xr compat 5 | |
| 96 | .Sh HISTORY | |
| 97 | The | |
| 98 | .Fn peeloff | |
| 99 | function call appeared in Darwin 13.0.0 |