108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2012 Intel Corporation. All rights reserved.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include "systemd.h"
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int sd_listen_fds(int unset_environment)
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{
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return 0;
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}
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int sd_notify(int unset_environment, const char *state)
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{
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const char *sock;
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struct sockaddr_un addr;
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struct msghdr msghdr;
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struct iovec iovec;
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int fd, err;
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if (!state) {
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err = -EINVAL;
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goto done;
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}
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sock = getenv("NOTIFY_SOCKET");
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if (!sock)
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return 0;
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/* check for abstract socket or absolute path */
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if (sock[0] != '@' && sock[0] != '/') {
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err = -EINVAL;
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goto done;
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}
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fd = socket(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0);
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if (fd < 0) {
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err = -errno;
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goto done;
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}
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memset(&addr, 0, sizeof(addr));
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addr.sun_family = AF_UNIX;
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strncpy(addr.sun_path, sock, sizeof(addr.sun_path));
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if (addr.sun_path[0] == '@')
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addr.sun_path[0] = '\0';
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memset(&iovec, 0, sizeof(iovec));
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iovec.iov_base = (char *) state;
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iovec.iov_len = strlen(state);
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memset(&msghdr, 0, sizeof(msghdr));
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msghdr.msg_name = &addr;
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msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) +
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strlen(sock);
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if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
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msghdr.msg_namelen = sizeof(struct sockaddr_un);
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msghdr.msg_iov = &iovec;
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msghdr.msg_iovlen = 1;
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if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0)
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err = -errno;
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else
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err = 1;
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close(fd);
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done:
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if (unset_environment)
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unsetenv("NOTIFY_SOCKET");
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return err;
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}
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