1 /* //device/system/reference-ril/misc.c
2 **
3 ** Copyright 2006, The Android Open Source Project
4 **
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
8 **
9 **     http://www.apache.org/licenses/LICENSE-2.0
10 **
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 */
17 #include <sys/system_properties.h>
18 
19 #include "misc.h"
20 /** returns 1 if line starts with prefix, 0 if it does not */
strStartsWith(const char * line,const char * prefix)21 int strStartsWith(const char *line, const char *prefix)
22 {
23     for ( ; *line != '\0' && *prefix != '\0' ; line++, prefix++) {
24         if (*line != *prefix) {
25             return 0;
26         }
27     }
28 
29     return *prefix == '\0';
30 }
31 
32 // Returns true iff running this process in an emulator VM
isInEmulator(void)33 bool isInEmulator(void) {
34   static int inQemu = -1;
35   if (inQemu < 0) {
36       char propValue[PROP_VALUE_MAX];
37       inQemu = (__system_property_get("ro.kernel.qemu", propValue) != 0);
38   }
39   return inQemu == 1;
40 }
41