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 int wait_for_socket;
42 char *progname;
43
44 progname = argv[0];
45
46 wait_for_socket = argc > 1 && strcmp(argv[1], "--wait") == 0;
47 if(wait_for_socket) {
48 argv++;
49 argc--;
50 }
51
52 if(argc < 2) {
53 usage(progname);
54 exit(5);
55 }
56
57 while ((sock = socket_local_client("vold",
58 ANDROID_SOCKET_NAMESPACE_RESERVED,
59 SOCK_STREAM)) < 0) {
60 if(!wait_for_socket) {
61 fprintf(stderr, "Error connecting (%s)\n", strerror(errno));
62 exit(4);
63 } else {
64 sleep(1);
65 }
66 }
67
68 if (!strcmp(argv[1], "monitor")) {
69 exit(do_monitor(sock, 0));
70 } else {
71 exit(do_cmd(sock, argc, argv));
72 }
73 }
74
do_cmd(int sock,int argc,char ** argv)75 static int do_cmd(int sock, int argc, char **argv) {
76 char final_cmd[255] = "0 "; /* 0 is a (now required) sequence number */
77 int i;
78 size_t ret;
79
80 for (i = 1; i < argc; i++) {
81 char *cmp;
82
83 if (!strchr(argv[i], ' '))
84 asprintf(&cmp, "%s%s", argv[i], (i == (argc -1)) ? "" : " ");
85 else
86 asprintf(&cmp, "\"%s\"%s", argv[i], (i == (argc -1)) ? "" : " ");
87
88 ret = strlcat(final_cmd, cmp, sizeof(final_cmd));
89 if (ret >= sizeof(final_cmd))
90 abort();
91 free(cmp);
92 }
93
94 if (write(sock, final_cmd, strlen(final_cmd) + 1) < 0) {
95 perror("write");
96 return errno;
97 }
98
99 return do_monitor(sock, 1);
100 }
101
do_monitor(int sock,int stop_after_cmd)102 static int do_monitor(int sock, int stop_after_cmd) {
103 char *buffer = malloc(4096);
104
105 if (!stop_after_cmd)
106 printf("[Connected to Vold]\n");
107
108 while(1) {
109 fd_set read_fds;
110 struct timeval to;
111 int rc = 0;
112
113 to.tv_sec = 10;
114 to.tv_usec = 0;
115
116 FD_ZERO(&read_fds);
117 FD_SET(sock, &read_fds);
118
119 if ((rc = select(sock +1, &read_fds, NULL, NULL, &to)) < 0) {
120 fprintf(stderr, "Error in select (%s)\n", strerror(errno));
121 free(buffer);
122 return errno;
123 } else if (!rc) {
124 continue;
125 fprintf(stderr, "[TIMEOUT]\n");
126 return ETIMEDOUT;
127 } else if (FD_ISSET(sock, &read_fds)) {
128 memset(buffer, 0, 4096);
129 if ((rc = read(sock, buffer, 4096)) <= 0) {
130 if (rc == 0)
131 fprintf(stderr, "Lost connection to Vold - did it crash?\n");
132 else
133 fprintf(stderr, "Error reading data (%s)\n", strerror(errno));
134 free(buffer);
135 if (rc == 0)
136 return ECONNRESET;
137 return errno;
138 }
139
140 int offset = 0;
141 int i = 0;
142
143 for (i = 0; i < rc; i++) {
144 if (buffer[i] == '\0') {
145 int code;
146 char tmp[4];
147
148 strncpy(tmp, buffer + offset, 3);
149 tmp[3] = '\0';
150 code = atoi(tmp);
151
152 printf("%s\n", buffer + offset);
153 if (stop_after_cmd) {
154 if (code >= 200 && code < 600)
155 return 0;
156 }
157 offset = i + 1;
158 }
159 }
160 }
161 }
162 free(buffer);
163 return 0;
164 }
165
usage(char * progname)166 static void usage(char *progname) {
167 fprintf(stderr,
168 "Usage: %s [--wait] <monitor>|<cmd> [arg1] [arg2...]\n", progname);
169 }
170
171