90 lines
2.1 KiB
C
90 lines
2.1 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) 2013 Intel Corporation. All rights reserved.
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; 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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#include <unistd.h>
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#include <stdio.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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#define PROPERTY_VALUE_MAX 32
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#define BLUETOOTH_MODE_PROPERTY_NAME "persist.sys.bluetooth.mode"
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static inline int property_get(const char *key, char *value,
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const char *default_value)
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{
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const char *prop = NULL;
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if (!strcmp(key, BLUETOOTH_MODE_PROPERTY_NAME))
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prop = getenv("BLUETOOTH_MODE");
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if (!prop)
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prop = default_value;
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if (prop) {
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strncpy(value, prop, PROPERTY_VALUE_MAX);
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value[PROPERTY_VALUE_MAX - 1] = '\0';
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return strlen(value);
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}
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return 0;
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}
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/* property_set: returns 0 on success, < 0 on failure
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*/
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static inline int property_set(const char *key, const char *value)
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{
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static const char SYSTEM_SOCKET_PATH[] = "\0android_system";
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struct sockaddr_un addr;
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char msg[256];
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int fd, len;
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fd = socket(PF_LOCAL, SOCK_DGRAM, 0);
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if (fd < 0)
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return -1;
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memset(&addr, 0, sizeof(addr));
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addr.sun_family = AF_UNIX;
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memcpy(addr.sun_path, SYSTEM_SOCKET_PATH, sizeof(SYSTEM_SOCKET_PATH));
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if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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close(fd);
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return 0;
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}
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len = snprintf(msg, sizeof(msg), "%s=%s", key, value);
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if (send(fd, msg, len + 1, 0) < 0) {
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close(fd);
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return -1;
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}
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close(fd);
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return 0;
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}
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