1 /* $OpenBSD$ */ 2 3 /* 4 * Copyright (c) 2022 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 #include <sys/un.h> 21 22 #include <systemd/sd-daemon.h> 23 24 #include "tmux.h" 25 26 int 27 systemd_create_socket(int flags, char **cause) 28 { 29 int fds; 30 int fd; 31 struct sockaddr_un sa; 32 int addrlen = sizeof sa; 33 34 fds = sd_listen_fds(0); 35 if (fds > 1) { /* too many file descriptors */ 36 errno = E2BIG; 37 goto fail; 38 } 39 40 if (fds == 1) { /* socket-activated */ 41 fd = SD_LISTEN_FDS_START; 42 if (!sd_is_socket_unix(fd, SOCK_STREAM, 1, NULL, 0)) { 43 errno = EPFNOSUPPORT; 44 goto fail; 45 } 46 if (getsockname(fd, (struct sockaddr *)&sa, &addrlen) == -1) 47 goto fail; 48 socket_path = xstrdup(sa.sun_path); 49 return (fd); 50 } 51 52 return (server_create_socket(flags, cause)); 53 54 fail: 55 if (cause != NULL) 56 xasprintf(cause, "systemd socket error (%s)", strerror(errno)); 57 return (-1); 58 } 59