1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20 #include <string.h>
21 #include <signal.h>
22 #include <errno.h>
23 #include <fcntl.h>
24 #include <stdlib.h>
25
26 #include <sys/socket.h>
27 #include <sys/select.h>
28 #include <sys/time.h>
29 #include <sys/types.h>
30 #include <sys/un.h>
31
32 #include <cutils/sockets.h>
33 #include <private/android_filesystem_config.h>
34
35 static void usage(char *progname);
36 static int do_monitor(int sock, int stop_after_cmd);
37 static int do_cmd(int sock, int argc, char **argv);
38
main(int argc,char ** argv)39 int main(int argc, char **argv) {
40 int sock;
41
42 if (argc < 2)
43 usage(argv[0]);
44
45 if ((sock = socket_local_client("vold",
46 ANDROID_SOCKET_NAMESPACE_RESERVED,
47 SOCK_STREAM)) < 0) {
48 fprintf(stderr, "Error connecting (%s)\n", strerror(errno));
49 exit(4);
50 }
51
52 if (!strcmp(argv[1], "monitor"))
53 exit(do_monitor(sock, 0));
54 exit(do_cmd(sock, argc, argv));
55 }
56
do_cmd(int sock,int argc,char ** argv)57 static int do_cmd(int sock, int argc, char **argv) {
58 char final_cmd[255] = "0 "; /* 0 is a (now required) sequence number */
59 int i;
60 size_t ret;
61
62 for (i = 1; i < argc; i++) {
63 char *cmp;
64
65 if (!index(argv[i], ' '))
66 asprintf(&cmp, "%s%s", argv[i], (i == (argc -1)) ? "" : " ");
67 else
68 asprintf(&cmp, "\"%s\"%s", argv[i], (i == (argc -1)) ? "" : " ");
69
70 ret = strlcat(final_cmd, cmp, sizeof(final_cmd));
71 if (ret >= sizeof(final_cmd))
72 abort();
73 free(cmp);
74 }
75
76 if (write(sock, final_cmd, strlen(final_cmd) + 1) < 0) {
77 perror("write");
78 return errno;
79 }
80
81 return do_monitor(sock, 1);
82 }
83
do_monitor(int sock,int stop_after_cmd)84 static int do_monitor(int sock, int stop_after_cmd) {
85 char *buffer = malloc(4096);
86
87 if (!stop_after_cmd)
88 printf("[Connected to Vold]\n");
89
90 while(1) {
91 fd_set read_fds;
92 struct timeval to;
93 int rc = 0;
94
95 to.tv_sec = 10;
96 to.tv_usec = 0;
97
98 FD_ZERO(&read_fds);
99 FD_SET(sock, &read_fds);
100
101 if ((rc = select(sock +1, &read_fds, NULL, NULL, &to)) < 0) {
102 fprintf(stderr, "Error in select (%s)\n", strerror(errno));
103 free(buffer);
104 return errno;
105 } else if (!rc) {
106 continue;
107 fprintf(stderr, "[TIMEOUT]\n");
108 return ETIMEDOUT;
109 } else if (FD_ISSET(sock, &read_fds)) {
110 memset(buffer, 0, 4096);
111 if ((rc = read(sock, buffer, 4096)) <= 0) {
112 if (rc == 0)
113 fprintf(stderr, "Lost connection to Vold - did it crash?\n");
114 else
115 fprintf(stderr, "Error reading data (%s)\n", strerror(errno));
116 free(buffer);
117 if (rc == 0)
118 return ECONNRESET;
119 return errno;
120 }
121
122 int offset = 0;
123 int i = 0;
124
125 for (i = 0; i < rc; i++) {
126 if (buffer[i] == '\0') {
127 int code;
128 char tmp[4];
129
130 strncpy(tmp, buffer + offset, 3);
131 tmp[3] = '\0';
132 code = atoi(tmp);
133
134 printf("%s\n", buffer + offset);
135 if (stop_after_cmd) {
136 if (code >= 200 && code < 600)
137 return 0;
138 }
139 offset = i + 1;
140 }
141 }
142 }
143 }
144 free(buffer);
145 return 0;
146 }
147
usage(char * progname)148 static void usage(char *progname) {
149 fprintf(stderr, "Usage: %s <monitor>|<cmd> [arg1] [arg2...]\n", progname);
150 exit(1);
151 }
152
153