1 /* 2 * libjingle 3 * Copyright 2004--2009, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_LINUXFDWALK_H_ 29 #define TALK_BASE_LINUXFDWALK_H_ 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 // Linux port of SunOS's fdwalk(3) call. It loops over all open file descriptors 36 // and calls func on each one. Additionally, it is safe to use from the child 37 // of a fork that hasn't exec'ed yet, so you can use it to close all open file 38 // descriptors prior to exec'ing a daemon. 39 // The return value is 0 if successful, or else -1 and errno is set. The 40 // possible errors include any error that can be returned by opendir(), 41 // readdir(), or closedir(), plus EBADF if there are problems parsing the 42 // contents of /proc/self/fd. 43 // The file descriptors that are enumerated will not include the file descriptor 44 // used for the enumeration itself. 45 int fdwalk(void (*func)(void *, int), void *opaque); 46 47 #ifdef __cplusplus 48 } // extern "C" 49 #endif 50 51 #endif // TALK_BASE_LINUXFDWALK_H_ 52
