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
25 #include <sys/socket.h>
26 #include <sys/select.h>
27 #include <sys/time.h>
28 #include <sys/types.h>
29 #include <sys/un.h>
30
31 #include <cutils/sockets.h>
32 #include <private/android_filesystem_config.h>
33
34 static void usage(char *progname);
35 static int do_monitor(int sock, int stop_after_cmd);
36 static int do_cmd(int sock, int argc, char **argv);
37
main(int argc,char ** argv)38 int main(int argc, char **argv) {
39 int sock;
40 int cmdOffset = 0;
41
42 if (argc < 2)
43 usage(argv[0]);
44
45 // try interpreting the first arg as the socket name - if it fails go back to netd
46
47 if ((sock = socket_local_client(argv[1],
48 ANDROID_SOCKET_NAMESPACE_RESERVED,
49 SOCK_STREAM)) < 0) {
50 if ((sock = socket_local_client("netd",
51 ANDROID_SOCKET_NAMESPACE_RESERVED,
52 SOCK_STREAM)) < 0) {
53 fprintf(stderr, "Error connecting (%s)\n", strerror(errno));
54 exit(4);
55 }
56 } else {
57 if (argc < 3) usage(argv[0]);
58 printf("Using alt socket %s\n", argv[1]);
59 cmdOffset = 1;
60 }
61
62 if (!strcmp(argv[1+cmdOffset], "monitor"))
63 exit(do_monitor(sock, 0));
64 exit(do_cmd(sock, argc-cmdOffset, &(argv[cmdOffset])));
65 }
66
do_cmd(int sock,int argc,char ** argv)67 static int do_cmd(int sock, int argc, char **argv) {
68 char *final_cmd;
69 char *conv_ptr;
70 int i;
71
72 /* Check if 1st arg is cmd sequence number */
73 strtol(argv[1], &conv_ptr, 10);
74 if (conv_ptr == argv[1]) {
75 final_cmd = strdup("0 ");
76 } else {
77 final_cmd = strdup("");
78 }
79 if (final_cmd == NULL) {
80 int res = errno;
81 perror("strdup failed");
82 return res;
83 }
84
85 for (i = 1; i < argc; i++) {
86 if (strchr(argv[i], '"')) {
87 perror("argument with embedded quotes not allowed");
88 free(final_cmd);
89 return 1;
90 }
91 bool needs_quoting = strchr(argv[i], ' ');
92 const char *format = needs_quoting ? "%s\"%s\"%s" : "%s%s%s";
93 char *tmp_final_cmd;
94
95 if (asprintf(&tmp_final_cmd, format, final_cmd, argv[i],
96 (i == (argc - 1)) ? "" : " ") < 0) {
97 int res = errno;
98 perror("failed asprintf");
99 free(final_cmd);
100 return res;
101 }
102 free(final_cmd);
103 final_cmd = tmp_final_cmd;
104 }
105
106 if (write(sock, final_cmd, strlen(final_cmd) + 1) < 0) {
107 int res = errno;
108 perror("write");
109 free(final_cmd);
110 return res;
111 }
112 free(final_cmd);
113
114 return do_monitor(sock, 1);
115 }
116
do_monitor(int sock,int stop_after_cmd)117 static int do_monitor(int sock, int stop_after_cmd) {
118 char *buffer = malloc(4096);
119
120 if (!stop_after_cmd)
121 printf("[Connected to Netd]\n");
122
123 while(1) {
124 fd_set read_fds;
125 struct timeval to;
126 int rc = 0;
127
128 to.tv_sec = 10;
129 to.tv_usec = 0;
130
131 FD_ZERO(&read_fds);
132 FD_SET(sock, &read_fds);
133
134 if ((rc = select(sock +1, &read_fds, NULL, NULL, &to)) < 0) {
135 int res = errno;
136 fprintf(stderr, "Error in select (%s)\n", strerror(errno));
137 free(buffer);
138 return res;
139 } else if (!rc) {
140 continue;
141 fprintf(stderr, "[TIMEOUT]\n");
142 return ETIMEDOUT;
143 } else if (FD_ISSET(sock, &read_fds)) {
144 memset(buffer, 0, 4096);
145 if ((rc = read(sock, buffer, 4096)) <= 0) {
146 int res = errno;
147 if (rc == 0)
148 fprintf(stderr, "Lost connection to Netd - did it crash?\n");
149 else
150 fprintf(stderr, "Error reading data (%s)\n", strerror(errno));
151 free(buffer);
152 if (rc == 0)
153 return ECONNRESET;
154 return res;
155 }
156
157 int offset = 0;
158 int i = 0;
159
160 for (i = 0; i < rc; i++) {
161 if (buffer[i] == '\0') {
162 int code;
163 char tmp[4];
164
165 strncpy(tmp, buffer + offset, 3);
166 tmp[3] = '\0';
167 code = atoi(tmp);
168
169 printf("%s\n", buffer + offset);
170 if (stop_after_cmd) {
171 if (code >= 200 && code < 600)
172 return 0;
173 }
174 offset = i + 1;
175 }
176 }
177 }
178 }
179 free(buffer);
180 return 0;
181 }
182
usage(char * progname)183 static void usage(char *progname) {
184 fprintf(stderr, "Usage: %s [<sockname>] ([monitor] | ([<cmd_seq_num>] <cmd> [arg ...]))\n", progname);
185 exit(1);
186 }
187