int
ancil_send_fd(int sock, int fd)
{
ANCIL_FD_BUFFER(1) buffer;
return(ancil_send_fds_with_buffer(sock, &fd, 1, &buffer));
}
int
ancil_send_fds(int sock, const int *fds, unsigned n_fds)
{
ANCIL_FD_BUFFER(ANCIL_MAX_N_FDS) buffer;
assert(n_fds <= ANCIL_MAX_N_FDS);
return(ancil_send_fds_with_buffer(sock, fds, n_fds, &buffer));
}
int main(int argc, char *argv[]) {
// connect to supplied address and send the greeting message to server
int sock = Bootstrap(argv[1]);
// process requests infinitely (we will be killed when done)
int* nameLength;
char status[3];
while(1) {
int nameLength;
if (scanf("%d", &nameLength) != 1)
DieWithError("reading a filename length failed");
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, "Length is %d", nameLength);
char* filename;
if ((filename = (char*) calloc(nameLength + 1, 1)) == NULL)
DieWithError("calloc() failed");
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, "Allocated %d - sized buffer", nameLength + 1);
if (fgets(filename, nameLength + 1, stdin) == NULL)
DieWithError("reading filename failed");
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, "Attempting to open %s", filename);
int mode;
if (scanf("%d", &mode) != 1)
DieWithError("reading a mode failed");
// freaking MIPS...
if (mode&0x400) {
mode ^= 0x400;
mode |= O_APPEND;
}
if (mode&0x40) {
mode ^= 0x40;
mode |= O_CREAT;
}
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, "Mode is %d", mode);
int targetFd = open(filename, mode, S_IRWXU|S_IRWXG);
if (targetFd > 0) {
if (ancil_send_fds_with_buffer(sock, targetFd))
DieWithError("sending file descriptor failed");
} else {
fprintf(stderr, "Error: failed to open a file - %s\n", strerror(errno));
}
free(filename);
close(targetFd);
}
return -1;
}
// Perform initial greeting dance with server over socket with supplied name.
// The procedure ends with "READY" and tty file descriptor are sent over the socket
// and "GO" being received in response, which means, that the server process has acquired
// file descriptor on the controlling terminal
static int Bootstrap(char *socket_name) {
int tty, sock;
tty = GetTTY(sock);
if ((sock = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0)
DieWithError("socket() failed");
struct sockaddr_un echoServAddr;
memset(&echoServAddr, 0, sizeof(echoServAddr));
echoServAddr.sun_family = AF_LOCAL;
strncpy(echoServAddr.sun_path + 1, socket_name, sizeof(echoServAddr.sun_path) - 2);
int size = sizeof(echoServAddr) - sizeof(echoServAddr.sun_path) + strlen(echoServAddr.sun_path+1) + 1;
if (connect(sock, (struct sockaddr *) &echoServAddr, size) < 0)
DieWithError("connect() failed");
dup2(sock, 1);
dup2(sock, 2);
if (ancil_send_fds_with_buffer(sock, tty))
DieWithError("sending tty descriptor failed");
if (scanf("GO") == 0) {
if (close(tty))
DieWithError("failed to close controlling tty");
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, "The controlling tty is closed");
} else
DieWithError("incomplete confirmation message");
return sock;
}
