1 /*** 2 This file is part of avahi. 3 4 avahi is free software; you can redistribute it and/or modify it 5 under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 avahi is distributed in the hope that it will be useful, but WITHOUT 10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General 12 Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with avahi; if not, write to the Free Software 16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 17 USA. 18 ***/ 19 20 #ifdef HAVE_CONFIG_H 21 #include <config.h> 22 #endif 23 24 #include <sys/select.h> 25 #include <unistd.h> 26 #include <fcntl.h> 27 #include <assert.h> 28 29 #include "fdutil.h" 30 31 int avahi_set_cloexec(int fd) { 32 int n; 33 34 assert(fd >= 0); 35 36 if ((n = fcntl(fd, F_GETFD)) < 0) 37 return -1; 38 39 if (n & FD_CLOEXEC) 40 return 0; 41 42 return fcntl(fd, F_SETFD, n|FD_CLOEXEC); 43 } 44 45 int avahi_set_nonblock(int fd) { 46 int n; 47 48 assert(fd >= 0); 49 50 if ((n = fcntl(fd, F_GETFL)) < 0) 51 return -1; 52 53 if (n & O_NONBLOCK) 54 return 0; 55 56 return fcntl(fd, F_SETFL, n|O_NONBLOCK); 57 } 58 59 int avahi_wait_for_write(int fd) { 60 fd_set fds; 61 int r; 62 63 FD_ZERO(&fds); 64 FD_SET(fd, &fds); 65 66 if ((r = select(fd+1, NULL, &fds, NULL, NULL)) < 0) 67 return -1; 68 69 assert(r > 0); 70 71 return 0; 72 } 73
