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
35static void usage(char *progname);
36static int do_monitor(int sock, int stop_after_cmd);
37static int do_cmd(int sock, int argc, char **argv);
38
39int 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
57static 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    int 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
84static 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
148static void usage(char *progname) {
149    fprintf(stderr, "Usage: %s <monitor>|<cmd> [arg1] [arg2...]\n", progname);
150    exit(1);
151}
152
153