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1 | /* -*-c-*- |
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2 | * |
| 3 | * File descriptor passing |
| 4 | * |
| 5 | * (c) 2003 Straylight/Edgeware |
| 6 | */ |
| 7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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9 | * |
| 10 | * This file is part of the mLib utilities library. |
| 11 | * |
| 12 | * mLib is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU Library General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of the |
| 15 | * License, or (at your option) any later version. |
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16 | * |
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17 | * mLib is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU Library General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with mLib; if not, write to the Free |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 25 | * MA 02111-1307, USA. |
| 26 | */ |
| 27 | |
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28 | #ifndef MLIB_FDPASS_H |
| 29 | #define MLIB_FDPASS_H |
| 30 | |
| 31 | #ifdef __cplusplus |
| 32 | extern "C" { |
| 33 | #endif |
| 34 | |
| 35 | /*----- Header files ------------------------------------------------------*/ |
| 36 | |
| 37 | #include <sys/types.h> |
| 38 | #include <unistd.h> |
| 39 | |
| 40 | /*----- Functions provided ------------------------------------------------*/ |
| 41 | |
| 42 | /* --- @fdpass_send@ --- * |
| 43 | * |
| 44 | * Arguments: @int sock@ = socket to send over |
| 45 | * @int fd@ = file descriptor to send |
| 46 | * @const void *p@ = pointer to data to send |
| 47 | * @size_t sz@ = size of buffer to send |
| 48 | * |
| 49 | * Returns: On error, @-1@, otherwise number of bytes transferred from |
| 50 | * @p@. |
| 51 | * |
| 52 | * Use: Sends a copy of file descriptor @fd@ to the other end of |
| 53 | * @sock@. |
| 54 | */ |
| 55 | |
| 56 | extern ssize_t fdpass_send(int /*sock*/, int /*fd*/, |
| 57 | const void */*p*/, size_t /*sz*/); |
| 58 | |
| 59 | /* --- @fdpass_recv@ --- * |
| 60 | * |
| 61 | * Arguments: @int sock@ = socket to send over |
| 62 | * @int *fd@ = where to put received descriptor |
| 63 | * @void *p@ = pointer to where to put data |
| 64 | * @size_t sz@ = size of buffer |
| 65 | * |
| 66 | * Returns: On error, @-1@, otherwise number of bytes transferred. |
| 67 | * |
| 68 | * Use: Receives a file descriptor. If the call succeeds, and there |
| 69 | * was a file descriptor, then @fd@ won't be @-1@ on exit; |
| 70 | * otherwise it will. At most one descriptor will be collected. |
| 71 | */ |
| 72 | |
| 73 | extern ssize_t fdpass_recv(int /*sock*/, int */*fd*/, |
| 74 | void */*p*/, size_t /*sz*/); |
| 75 | |
| 76 | /*----- That's all, folks -------------------------------------------------*/ |
| 77 | |
| 78 | #ifdef __cplusplus |
| 79 | } |
| 80 | #endif |
| 81 | |
| 82 | #endif |
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