/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <limits.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <assert.h>

#include "sysdeps.h"

#ifdef HAVE_TERMIO_H
#include <termios.h>
#endif

#define  TRACE_TAG  TRACE_ADB
#include "adb.h"
#include "adb_client.h"
#include "file_sync_service.h"

#ifdef SH_HISTORY
#include "shlist.h"
#include "history.h"
#endif

enum {
    IGNORE_DATA,
    WIPE_DATA,
    FLASH_DATA
};

static int do_cmd(transport_type ttype, char* serial, char *cmd, ...);

void get_my_path(char s[PATH_MAX]);
int find_sync_dirs(const char *srcarg,
        char **android_srcdir_out, char **data_srcdir_out);
int install_app(transport_type transport, char* serial, int argc, char** argv);
int uninstall_app(transport_type transport, char* serial, int argc, char** argv);

static const char *gProductOutPath = NULL;

static char *product_file(const char *extra)
{
    int n;
    char *x;

    if (gProductOutPath == NULL) {
        fprintf(stderr, "adb: Product directory not specified; "
                "use -p or define ANDROID_PRODUCT_OUT\n");
        exit(1);
    }

    n = strlen(gProductOutPath) + strlen(extra) + 2;
    x = malloc(n);
    if (x == 0) {
        fprintf(stderr, "adb: Out of memory (product_file())\n");
        exit(1);
    }

    snprintf(x, (size_t)n, "%s" OS_PATH_SEPARATOR_STR "%s", gProductOutPath, extra);
    return x;
}

void version(FILE * out) {
    fprintf(out, "Android Debug Bridge version %d.%d.%d\n",
         ADB_VERSION_MAJOR, ADB_VERSION_MINOR, ADB_SERVER_VERSION);
}

void help()
{
    version(stderr);

    fprintf(stderr,
        "\n"
        " -d                            - directs command to the only connected USB device\n"
        "                                 returns an error if more than one USB device is present.\n"
        " -e                            - directs command to the only running emulator.\n"
        "                                 returns an error if more than one emulator is running.\n"
        " -s <serial number>            - directs command to the USB device or emulator with\n"
        "                                 the given serial number\n"
        " -p <product name or path>     - simple product name like 'sooner', or\n"
        "                                 a relative/absolute path to a product\n"
        "                                 out directory like 'out/target/product/sooner'.\n"
        "                                 If -p is not specified, the ANDROID_PRODUCT_OUT\n"
        "                                 environment variable is used, which must\n"
        "                                 be an absolute path.\n"
        " devices                       - list all connected devices\n"
        "\n"
        "device commands:\n"
        "  adb push <local> <remote>    - copy file/dir to device\n"
        "  adb pull <remote> <local>    - copy file/dir from device\n"
        "  adb sync [ <directory> ]     - copy host->device only if changed\n"
        "                                 (see 'adb help all')\n"
        "  adb shell                    - run remote shell interactively\n"
        "  adb shell <command>          - run remote shell command\n"
        "  adb emu <command>            - run emulator console command\n"
        "  adb logcat [ <filter-spec> ] - View device log\n"
        "  adb forward <local> <remote> - forward socket connections\n"
        "                                 forward specs are one of: \n"
        "                                   tcp:<port>\n"
        "                                   localabstract:<unix domain socket name>\n"
        "                                   localreserved:<unix domain socket name>\n"
        "                                   localfilesystem:<unix domain socket name>\n"
        "                                   dev:<character device name>\n"
        "                                   jdwp:<process pid> (remote only)\n"
        "  adb jdwp                     - list PIDs of processes hosting a JDWP transport\n"
        "  adb install [-l] [-r] <file> - push this package file to the device and install it\n"
        "                                 ('-l' means forward-lock the app)\n"
        "                                 ('-r' means reinstall the app, keeping its data)\n"
        "  adb uninstall [-k] <package> - remove this app package from the device\n"
        "                                 ('-k' means keep the data and cache directories)\n"
        "  adb bugreport                - return all information from the device\n"
        "                                 that should be included in a bug report.\n"
        "\n"
        "  adb help                     - show this help message\n"
        "  adb version                  - show version num\n"
        "\n"
        "DATAOPTS:\n"
        " (no option)                   - don't touch the data partition\n"
        "  -w                           - wipe the data partition\n"
        "  -d                           - flash the data partition\n"
        "\n"
        "scripting:\n"
        "  adb wait-for-device          - block until device is online\n"
        "  adb start-server             - ensure that there is a server running\n"
        "  adb kill-server              - kill the server if it is running\n"
        "  adb get-state                - prints: offline | bootloader | device\n"
        "  adb get-serialno             - prints: <serial-number>\n"
        "  adb status-window            - continuously print device status for a specified device\n"
        "  adb remount                  - remounts the /system partition on the device read-write\n"
        "  adb reboot [bootloader|recovery] - reboots the device, optionally into the bootloader or recovery program\n"
        "  adb root                     - restarts adb with root permissions\n"
        "\n"
        "networking:\n"
        "  adb ppp <tty> [parameters]   - Run PPP over USB.\n"
        " Note: you should not automatically start a PPP connection.\n"
        " <tty> refers to the tty for PPP stream. Eg. dev:/dev/omap_csmi_tty1\n"
        " [parameters] - Eg. defaultroute debug dump local notty usepeerdns\n"
        "\n"
        "adb sync notes: adb sync [ <directory> ]\n"
        "  <localdir> can be interpreted in several ways:\n"
        "\n"
        "  - If <directory> is not specified, both /system and /data partitions will be updated.\n"
        "\n"
        "  - If it is \"system\" or \"data\", only the corresponding partition\n"
        "    is updated.\n"
        );
}

int usage()
{
    help();
    return 1;
}

#ifdef HAVE_TERMIO_H
static struct termios tio_save;

static void stdin_raw_init(int fd)
{
    struct termios tio;

    if(tcgetattr(fd, &tio)) return;
    if(tcgetattr(fd, &tio_save)) return;

    tio.c_lflag = 0; /* disable CANON, ECHO*, etc */

        /* no timeout but request at least one character per read */
    tio.c_cc[VTIME] = 0;
    tio.c_cc[VMIN] = 1;

    tcsetattr(fd, TCSANOW, &tio);
    tcflush(fd, TCIFLUSH);
}

static void stdin_raw_restore(int fd)
{
    tcsetattr(fd, TCSANOW, &tio_save);
    tcflush(fd, TCIFLUSH);
}
#endif

static void read_and_dump(int fd)
{
    char buf[4096];
    int len;

    while(fd >= 0) {
        len = adb_read(fd, buf, 4096);
        if(len == 0) {
            break;
        }

        if(len < 0) {
            if(errno == EINTR) continue;
            break;
        }
        /* we want to output to stdout, so no adb_write here !! */
        unix_write(1, buf, len);
    }
}

#ifdef SH_HISTORY
int shItemCmp( void *val, void *idata )
{
    return( (strcmp( val, idata ) == 0) );
}
#endif

static void *stdin_read_thread(void *x)
{
    int fd, fdi;
    unsigned char buf[1024];
#ifdef SH_HISTORY
    unsigned char realbuf[1024], *buf_ptr;
    SHLIST history;
    SHLIST *item = &history;
    int cmdlen = 0, ins_flag = 0;
#endif
    int r, n;
    int state = 0;

    int *fds = (int*) x;
    fd = fds[0];
    fdi = fds[1];
    free(fds);

#ifdef SH_HISTORY
    shListInitList( &history );
#endif
    for(;;) {
        /* fdi is really the client's stdin, so use read, not adb_read here */
        r = unix_read(fdi, buf, 1024);
        if(r == 0) break;
        if(r < 0) {
            if(errno == EINTR) continue;
            break;
        }
#ifdef SH_HISTORY
        if( (r == 3) &&                                       /* Arrow processing */
            (memcmp( (void *)buf, SH_ARROW_ANY, 2 ) == 0) ) {
            switch( buf[2] ) {
                case SH_ARROW_UP:
                    item = shListGetNextItem( &history, item );
                    break;
                case SH_ARROW_DOWN:
                    item = shListGetPrevItem( &history, item );
                    break;
                default:
                    item = NULL;
                    break;
            }
            memset( buf, SH_DEL_CHAR, cmdlen );
            if( item != NULL ) {
                n = snprintf( (char *)(&buf[cmdlen]), sizeof buf - cmdlen, "%s", (char *)(item->data) );
                memcpy( realbuf, item->data, n );
            }
            else { /* Clean buffer */
                item = &history;
                n = 0;
            }
            r = n + cmdlen;
            cmdlen = n;
            ins_flag = 0;
            if( r == 0 )
                continue;
        }
        else {
#endif
            for(n = 0; n < r; n++){
                switch(buf[n]) {
                case '\n':
#ifdef SH_HISTORY
                    if( ins_flag && (SH_BLANK_CHAR <= realbuf[0]) ) {
                        buf_ptr = malloc(cmdlen + 1);
                        if( buf_ptr != NULL ) {
                            memcpy( buf_ptr, realbuf, cmdlen );
                            buf_ptr[cmdlen] = '\0';
                            if( (item = shListFindItem( &history, (void *)buf_ptr, shItemCmp )) == NULL ) {
                                shListInsFirstItem( &history, (void *)buf_ptr );
                                item = &history;
                            }
                        }
                    }
                    cmdlen = 0;
                    ins_flag = 0;
#endif
                    state = 1;
                    break;
                case '\r':
                    state = 1;
                    break;
                case '~':
                    if(state == 1) state++;
                    break;
                case '.':
                    if(state == 2) {
                        fprintf(stderr,"\n* disconnect *\n");
    #ifdef HAVE_TERMIO_H
                        stdin_raw_restore(fdi);
    #endif
                        exit(0);
                    }
                default:
#ifdef SH_HISTORY
                    if( buf[n] == SH_DEL_CHAR ) {
                        if( cmdlen > 0 )
                            cmdlen--;
                    }
                    else {
                        realbuf[cmdlen] = buf[n];
                        cmdlen++;
                    }
                    ins_flag = 1;
#endif
                    state = 0;
                }
            }
#ifdef SH_HISTORY
        }
#endif
        r = adb_write(fd, buf, r);
        if(r <= 0) {
            break;
        }
    }
#ifdef SH_HISTORY
    shListDelAllItems( &history, (shListFree)free );
#endif
    return 0;
}

int interactive_shell(void)
{
    adb_thread_t thr;
    int fdi, fd;
    int *fds;

    fd = adb_connect("shell:");
    if(fd < 0) {
        fprintf(stderr,"error: %s\n", adb_error());
        return 1;
    }
    fdi = 0; //dup(0);

    fds = malloc(sizeof(int) * 2);
    fds[0] = fd;
    fds[1] = fdi;

#ifdef HAVE_TERMIO_H
    stdin_raw_init(fdi);
#endif
    adb_thread_create(&thr, stdin_read_thread, fds);
    read_and_dump(fd);
#ifdef HAVE_TERMIO_H
    stdin_raw_restore(fdi);
#endif
    return 0;
}


static void format_host_command(char* buffer, size_t  buflen, const char* command, transport_type ttype, const char* serial)
{
    if (serial) {
        snprintf(buffer, buflen, "host-serial:%s:%s", serial, command);
    } else {
        const char* prefix = "host";
        if (ttype == kTransportUsb)
            prefix = "host-usb";
        else if (ttype == kTransportLocal)
            prefix = "host-local";

        snprintf(buffer, buflen, "%s:%s", prefix, command);
    }
}

static void status_window(transport_type ttype, const char* serial)
{
    char command[4096];
    char *state = 0;
    char *laststate = 0;

        /* silence stderr */
#ifdef _WIN32
    /* XXX: TODO */
#else
    int  fd;
    fd = unix_open("/dev/null", O_WRONLY);
    dup2(fd, 2);
    adb_close(fd);
#endif

    format_host_command(command, sizeof command, "get-state", ttype, serial);

    for(;;) {
        adb_sleep_ms(250);

        if(state) {
            free(state);
            state = 0;
        }

        state = adb_query(command);

        if(state) {
            if(laststate && !strcmp(state,laststate)){
                continue;
            } else {
                if(laststate) free(laststate);
                laststate = strdup(state);
            }
        }

        printf("%c[2J%c[2H", 27, 27);
        printf("Android Debug Bridge\n");
        printf("State: %s\n", state ? state : "offline");
        fflush(stdout);
    }
}

/** duplicate string and quote all \ " ( ) chars + space character. */
static char *
dupAndQuote(const char *s)
{
    const char *ts;
    size_t alloc_len;
    char *ret;
    char *dest;

    ts = s;

    alloc_len = 0;

    for( ;*ts != '\0'; ts++) {
        alloc_len++;
        if (*ts == ' ' || *ts == '"' || *ts == '\\' || *ts == '(' || *ts == ')') {
            alloc_len++;
        }
    }

    ret = (char *)malloc(alloc_len + 1);

    ts = s;
    dest = ret;

    for ( ;*ts != '\0'; ts++) {
        if (*ts == ' ' || *ts == '"' || *ts == '\\' || *ts == '(' || *ts == ')') {
            *dest++ = '\\';
        }

        *dest++ = *ts;
    }

    *dest++ = '\0';

    return ret;
}

/**
 * Run ppp in "notty" mode against a resource listed as the first parameter
 * eg:
 *
 * ppp dev:/dev/omap_csmi_tty0 <ppp options>
 *
 */
int ppp(int argc, char **argv)
{
#ifdef HAVE_WIN32_PROC
    fprintf(stderr, "error: adb %s not implemented on Win32\n", argv[0]);
    return -1;
#else
    char *adb_service_name;
    pid_t pid;
    int fd;

    if (argc < 2) {
        fprintf(stderr, "usage: adb %s <adb service name> [ppp opts]\n",
                argv[0]);

        return 1;
    }

    adb_service_name = argv[1];

    fd = adb_connect(adb_service_name);

    if(fd < 0) {
        fprintf(stderr,"Error: Could not open adb service: %s. Error: %s\n",
                adb_service_name, adb_error());
        return 1;
    }

    pid = fork();

    if (pid < 0) {
        perror("from fork()");
        return 1;
    } else if (pid == 0) {
        int err;
        int i;
        const char **ppp_args;

        // copy args
        ppp_args = (const char **) alloca(sizeof(char *) * argc + 1);
        ppp_args[0] = "pppd";
        for (i = 2 ; i < argc ; i++) {
            //argv[2] and beyond become ppp_args[1] and beyond
            ppp_args[i - 1] = argv[i];
        }
        ppp_args[i-1] = NULL;

        // child side

        dup2(fd, STDIN_FILENO);
        dup2(fd, STDOUT_FILENO);
        adb_close(STDERR_FILENO);
        adb_close(fd);

        err = execvp("pppd", (char * const *)ppp_args);

        if (err < 0) {
            perror("execing pppd");
        }
        exit(-1);
    } else {
        // parent side

        adb_close(fd);
        return 0;
    }
#endif /* !HAVE_WIN32_PROC */
}

static int send_shellcommand(transport_type transport, char* serial, char* buf)
{
    int fd, ret;

    for(;;) {
        fd = adb_connect(buf);
        if(fd >= 0)
            break;
        fprintf(stderr,"- waiting for device -\n");
        adb_sleep_ms(1000);
        do_cmd(transport, serial, "wait-for-device", 0);
    }

    read_and_dump(fd);
    ret = adb_close(fd);
    if (ret)
        perror("close");

    return ret;
}

static int logcat(transport_type transport, char* serial, int argc, char **argv)
{
    char buf[4096];

    char *log_tags;
    char *quoted_log_tags;

    log_tags = getenv("ANDROID_LOG_TAGS");
    quoted_log_tags = dupAndQuote(log_tags == NULL ? "" : log_tags);

    snprintf(buf, sizeof(buf),
        "shell:export ANDROID_LOG_TAGS=\"\%s\" ; exec logcat",
        quoted_log_tags);

    free(quoted_log_tags);

    argc -= 1;
    argv += 1;
    while(argc-- > 0) {
        char *quoted;

        quoted = dupAndQuote (*argv++);

        strncat(buf, " ", sizeof(buf)-1);
        strncat(buf, quoted, sizeof(buf)-1);
        free(quoted);
    }

    send_shellcommand(transport, serial, buf);
    return 0;
}

#define SENTINEL_FILE "config" OS_PATH_SEPARATOR_STR "envsetup.make"
static int top_works(const char *top)
{
    if (top != NULL && adb_is_absolute_host_path(top)) {
        char path_buf[PATH_MAX];
        snprintf(path_buf, sizeof(path_buf),
                "%s" OS_PATH_SEPARATOR_STR SENTINEL_FILE, top);
        return access(path_buf, F_OK) == 0;
    }
    return 0;
}

static char *find_top_from(const char *indir, char path_buf[PATH_MAX])
{
    strcpy(path_buf, indir);
    while (1) {
        if (top_works(path_buf)) {
            return path_buf;
        }
        char *s = adb_dirstop(path_buf);
        if (s != NULL) {
            *s = '\0';
        } else {
            path_buf[0] = '\0';
            return NULL;
        }
    }
}

static char *find_top(char path_buf[PATH_MAX])
{
    char *top = getenv("ANDROID_BUILD_TOP");
    if (top != NULL && top[0] != '\0') {
        if (!top_works(top)) {
            fprintf(stderr, "adb: bad ANDROID_BUILD_TOP value \"%s\"\n", top);
            return NULL;
        }
    } else {
        top = getenv("TOP");
        if (top != NULL && top[0] != '\0') {
            if (!top_works(top)) {
                fprintf(stderr, "adb: bad TOP value \"%s\"\n", top);
                return NULL;
            }
        } else {
            top = NULL;
        }
    }

    if (top != NULL) {
        /* The environment pointed to a top directory that works.
         */
        strcpy(path_buf, top);
        return path_buf;
    }

    /* The environment didn't help.  Walk up the tree from the CWD
     * to see if we can find the top.
     */
    char dir[PATH_MAX];
    top = find_top_from(getcwd(dir, sizeof(dir)), path_buf);
    if (top == NULL) {
        /* If the CWD isn't under a good-looking top, see if the
         * executable is.
         */
        get_my_path(dir);
        top = find_top_from(dir, path_buf);
    }
    return top;
}

/* <hint> may be:
 * - A simple product name
 *   e.g., "sooner"
TODO: debug?  sooner-debug, sooner:debug?
 * - A relative path from the CWD to the ANDROID_PRODUCT_OUT dir
 *   e.g., "out/target/product/sooner"
 * - An absolute path to the PRODUCT_OUT dir
 *   e.g., "/src/device/out/target/product/sooner"
 *
 * Given <hint>, try to construct an absolute path to the
 * ANDROID_PRODUCT_OUT dir.
 */
static const char *find_product_out_path(const char *hint)
{
    static char path_buf[PATH_MAX];

    if (hint == NULL || hint[0] == '\0') {
        return NULL;
    }

    /* If it's already absolute, don't bother doing any work.
     */
    if (adb_is_absolute_host_path(hint)) {
        strcpy(path_buf, hint);
        return path_buf;
    }

    /* If there are any slashes in it, assume it's a relative path;
     * make it absolute.
     */
    if (adb_dirstart(hint) != NULL) {
        if (getcwd(path_buf, sizeof(path_buf)) == NULL) {
            fprintf(stderr, "adb: Couldn't get CWD: %s\n", strerror(errno));
            return NULL;
        }
        if (strlen(path_buf) + 1 + strlen(hint) >= sizeof(path_buf)) {
            fprintf(stderr, "adb: Couldn't assemble path\n");
            return NULL;
        }
        strcat(path_buf, OS_PATH_SEPARATOR_STR);
        strcat(path_buf, hint);
        return path_buf;
    }

    /* It's a string without any slashes.  Try to do something with it.
     *
     * Try to find the root of the build tree, and build a PRODUCT_OUT
     * path from there.
     */
    char top_buf[PATH_MAX];
    const char *top = find_top(top_buf);
    if (top == NULL) {
        fprintf(stderr, "adb: Couldn't find top of build tree\n");
        return NULL;
    }
//TODO: if we have a way to indicate debug, look in out/debug/target/...
    snprintf(path_buf, sizeof(path_buf),
            "%s" OS_PATH_SEPARATOR_STR
            "out" OS_PATH_SEPARATOR_STR
            "target" OS_PATH_SEPARATOR_STR
            "product" OS_PATH_SEPARATOR_STR
            "%s", top_buf, hint);
    if (access(path_buf, F_OK) < 0) {
        fprintf(stderr, "adb: Couldn't find a product dir "
                "based on \"-p %s\"; \"%s\" doesn't exist\n", hint, path_buf);
        return NULL;
    }
    return path_buf;
}

int adb_commandline(int argc, char **argv)
{
    char buf[4096];
    int no_daemon = 0;
    int is_daemon = 0;
    int persist = 0;
    int r;
    int quote;
    transport_type ttype = kTransportAny;
    char* serial = NULL;

        /* If defined, this should be an absolute path to
         * the directory containing all of the various system images
         * for a particular product.  If not defined, and the adb
         * command requires this information, then the user must
         * specify the path using "-p".
         */
    gProductOutPath = getenv("ANDROID_PRODUCT_OUT");
    if (gProductOutPath == NULL || gProductOutPath[0] == '\0') {
        gProductOutPath = NULL;
    }
    // TODO: also try TARGET_PRODUCT/TARGET_DEVICE as a hint

        /* modifiers and flags */
    while(argc > 0) {
        if(!strcmp(argv[0],"nodaemon")) {
            no_daemon = 1;
        } else if (!strcmp(argv[0], "fork-server")) {
            /* this is a special flag used only when the ADB client launches the ADB Server */
            is_daemon = 1;
        } else if(!strcmp(argv[0],"persist")) {
            persist = 1;
        } else if(!strncmp(argv[0], "-p", 2)) {
            const char *product = NULL;
            if (argv[0][2] == '\0') {
                if (argc < 2) return usage();
                product = argv[1];
                argc--;
                argv++;
            } else {
                product = argv[1] + 2;
            }
            gProductOutPath = find_product_out_path(product);
            if (gProductOutPath == NULL) {
                fprintf(stderr, "adb: could not resolve \"-p %s\"\n",
                        product);
                return usage();
            }
        } else if (argv[0][0]=='-' && argv[0][1]=='s') {
            if (isdigit(argv[0][2])) {
                serial = argv[0] + 2;
            } else {
                if(argc < 2) return usage();
                serial = argv[1];
                argc--;
                argv++;
            }
        } else if (!strcmp(argv[0],"-d")) {
            ttype = kTransportUsb;
        } else if (!strcmp(argv[0],"-e")) {
            ttype = kTransportLocal;
        } else {
                /* out of recognized modifiers and flags */
            break;
        }
        argc--;
        argv++;
    }

    adb_set_transport(ttype, serial);

    if ((argc > 0) && (!strcmp(argv[0],"server"))) {
        if (no_daemon || is_daemon) {
            r = adb_main(is_daemon);
        } else {
            r = launch_server();
        }
        if(r) {
            fprintf(stderr,"* could not start server *\n");
        }
        return r;
    }

top:
    if(argc == 0) {
        return usage();
    }

    /* adb_connect() commands */

    if(!strcmp(argv[0], "devices")) {
        char *tmp;
        snprintf(buf, sizeof buf, "host:%s", argv[0]);
        tmp = adb_query(buf);
        if(tmp) {
            printf("List of devices attached \n");
            printf("%s\n", tmp);
            return 0;
        } else {
            return 1;
        }
    }

    if (!strcmp(argv[0], "emu")) {
        return adb_send_emulator_command(argc, argv);
    }

    if(!strcmp(argv[0], "shell")) {
        int r;
        int fd;

        if(argc < 2) {
            return interactive_shell();
        }

        snprintf(buf, sizeof buf, "shell:%s", argv[1]);
        argc -= 2;
        argv += 2;
        while(argc-- > 0) {
            strcat(buf, " ");

            /* quote empty strings and strings with spaces */
            quote = (**argv == 0 || strchr(*argv, ' '));
            if (quote)
            	strcat(buf, "\"");
            strcat(buf, *argv++);
            if (quote)
            	strcat(buf, "\"");
        }

        for(;;) {
            fd = adb_connect(buf);
            if(fd >= 0) {
                read_and_dump(fd);
                adb_close(fd);
                r = 0;
            } else {
                fprintf(stderr,"error: %s\n", adb_error());
                r = -1;
            }

            if(persist) {
                fprintf(stderr,"\n- waiting for device -\n");
                adb_sleep_ms(1000);
                do_cmd(ttype, serial, "wait-for-device", 0);
            } else {
                return r;
            }
        }
    }

    if(!strcmp(argv[0], "kill-server")) {
        int fd;
        fd = _adb_connect("host:kill");
        if(fd == -1) {
            fprintf(stderr,"* server not running *\n");
            return 1;
        }
        return 0;
    }

    if(!strcmp(argv[0], "remount")) {
        int fd = adb_connect("remount:");
        if(fd >= 0) {
            read_and_dump(fd);
            adb_close(fd);
            return 0;
        }
        fprintf(stderr,"error: %s\n", adb_error());
        return 1;
    }

    if(!strcmp(argv[0], "reboot")) {
        int fd;
        if (argc > 1)
            snprintf(buf, sizeof(buf), "reboot:%s", argv[1]);
        else
            snprintf(buf, sizeof(buf), "reboot:");
        fd = adb_connect(buf);
        if(fd >= 0) {
            read_and_dump(fd);
            adb_close(fd);
            return 0;
        }
        fprintf(stderr,"error: %s\n", adb_error());
        return 1;
    }

    if(!strcmp(argv[0], "root")) {
        int fd = adb_connect("root:");
        if(fd >= 0) {
            read_and_dump(fd);
            adb_close(fd);
            return 0;
        }
        fprintf(stderr,"error: %s\n", adb_error());
        return 1;
    }

    if(!strcmp(argv[0], "bugreport")) {
        if (argc != 1) {
            return 1;
        }
        do_cmd(ttype, serial, "shell", "dumpstate", "-", 0);
        return 0;
    }

    /* adb_command() wrapper commands */

    if(!strncmp(argv[0], "wait-for-", strlen("wait-for-"))) {
        char* service = argv[0];
        if (!strncmp(service, "wait-for-device", strlen("wait-for-device"))) {
            if (ttype == kTransportUsb) {
                service = "wait-for-usb";
            } else if (ttype == kTransportLocal) {
                service = "wait-for-local";
            } else {
                service = "wait-for-any";
            }
        }

        format_host_command(buf, sizeof buf, service, ttype, serial);

        if (adb_command(buf)) {
            D("failure: %s *\n",adb_error());
            fprintf(stderr,"error: %s\n", adb_error());
            return 1;
        }

        /* Allow a command to be run after wait-for-device,
            * e.g. 'adb wait-for-device shell'.
            */
        if(argc > 1) {
            argc--;
            argv++;
            goto top;
        }
        return 0;
    }

    if(!strcmp(argv[0], "forward")) {
        if(argc != 3) return usage();
        if (serial) {
            snprintf(buf, sizeof buf, "host-serial:%s:forward:%s;%s",serial,argv[1],argv[2]);
        } else {
            snprintf(buf, sizeof buf, "host:forward:%s;%s",argv[1],argv[2]);
        }
        if(adb_command(buf)) {
            fprintf(stderr,"error: %s\n", adb_error());
            return 1;
        }
        return 0;
    }

    /* do_sync_*() commands */

    if(!strcmp(argv[0], "ls")) {
        if(argc != 2) return usage();
        return do_sync_ls(argv[1]);
    }

    if(!strcmp(argv[0], "push")) {
        if(argc != 3) return usage();
        return do_sync_push(argv[1], argv[2], 0 /* no verify APK */);
    }

    if(!strcmp(argv[0], "pull")) {
        if(argc != 3) return usage();
        return do_sync_pull(argv[1], argv[2]);
    }

    if(!strcmp(argv[0], "install")) {
        if (argc < 2) return usage();
        return install_app(ttype, serial, argc, argv);
    }

    if(!strcmp(argv[0], "uninstall")) {
        if (argc < 2) return usage();
        return uninstall_app(ttype, serial, argc, argv);
    }

    if(!strcmp(argv[0], "sync")) {
        char *srcarg, *android_srcpath, *data_srcpath;
        int ret;
        if(argc < 2) {
            /* No local path was specified. */
            srcarg = NULL;
        } else if(argc == 2) {
            /* A local path or "android"/"data" arg was specified. */
            srcarg = argv[1];
        } else {
            return usage();
        }
        ret = find_sync_dirs(srcarg, &android_srcpath, &data_srcpath);
        if(ret != 0) return usage();

        if(android_srcpath != NULL)
            ret = do_sync_sync(android_srcpath, "/system");
        if(ret == 0 && data_srcpath != NULL)
            ret = do_sync_sync(data_srcpath, "/data");

        free(android_srcpath);
        free(data_srcpath);
        return ret;
    }

    /* passthrough commands */

    if(!strcmp(argv[0],"get-state") ||
        !strcmp(argv[0],"get-serialno"))
    {
        char *tmp;

        format_host_command(buf, sizeof buf, argv[0], ttype, serial);
        tmp = adb_query(buf);
        if(tmp) {
            printf("%s\n", tmp);
            return 0;
        } else {
            return 1;
        }
    }

    /* other commands */

    if(!strcmp(argv[0],"status-window")) {
        status_window(ttype, serial);
        return 0;
    }

    if(!strcmp(argv[0],"logcat") || !strcmp(argv[0],"lolcat")) {
        return logcat(ttype, serial, argc, argv);
    }

    if(!strcmp(argv[0],"ppp")) {
        return ppp(argc, argv);
    }

    if (!strcmp(argv[0], "start-server")) {
        return adb_connect("host:start-server");
    }

    if (!strcmp(argv[0], "jdwp")) {
        int  fd = adb_connect("jdwp");
        if (fd >= 0) {
            read_and_dump(fd);
            adb_close(fd);
            return 0;
        } else {
            fprintf(stderr, "error: %s\n", adb_error());
            return -1;
        }
    }

    /* "adb /?" is a common idiom under Windows */
    if(!strcmp(argv[0], "help") || !strcmp(argv[0], "/?")) {
        help();
        return 0;
    }

    if(!strcmp(argv[0], "version")) {
        version(stdout);
        return 0;
    }

    usage();
    return 1;
}

static int do_cmd(transport_type ttype, char* serial, char *cmd, ...)
{
    char *argv[16];
    int argc;
    va_list ap;

    va_start(ap, cmd);
    argc = 0;

    if (serial) {
        argv[argc++] = "-s";
        argv[argc++] = serial;
    } else if (ttype == kTransportUsb) {
        argv[argc++] = "-d";
    } else if (ttype == kTransportLocal) {
        argv[argc++] = "-e";
    }

    argv[argc++] = cmd;
    while((argv[argc] = va_arg(ap, char*)) != 0) argc++;
    va_end(ap);

#if 0
    int n;
    fprintf(stderr,"argc = %d\n",argc);
    for(n = 0; n < argc; n++) {
        fprintf(stderr,"argv[%d] = \"%s\"\n", n, argv[n]);
    }
#endif

    return adb_commandline(argc, argv);
}

int find_sync_dirs(const char *srcarg,
        char **android_srcdir_out, char **data_srcdir_out)
{
    char *android_srcdir, *data_srcdir;

    if(srcarg == NULL) {
        android_srcdir = product_file("system");
        data_srcdir = product_file("data");
    } else {
        /* srcarg may be "data", "system" or NULL.
         * if srcarg is NULL, then both data and system are synced
         */
        if(strcmp(srcarg, "system") == 0) {
            android_srcdir = product_file("system");
            data_srcdir = NULL;
        } else if(strcmp(srcarg, "data") == 0) {
            android_srcdir = NULL;
            data_srcdir = product_file("data");
        } else {
            /* It's not "system" or "data".
             */
            return 1;
        }
    }

    if(android_srcdir_out != NULL)
        *android_srcdir_out = android_srcdir;
    else
        free(android_srcdir);

    if(data_srcdir_out != NULL)
        *data_srcdir_out = data_srcdir;
    else
        free(data_srcdir);

    return 0;
}

static int pm_command(transport_type transport, char* serial,
                      int argc, char** argv)
{
    char buf[4096];

    snprintf(buf, sizeof(buf), "shell:pm");

    while(argc-- > 0) {
        char *quoted;

        quoted = dupAndQuote(*argv++);

        strncat(buf, " ", sizeof(buf)-1);
        strncat(buf, quoted, sizeof(buf)-1);
        free(quoted);
    }

    send_shellcommand(transport, serial, buf);
    return 0;
}

int uninstall_app(transport_type transport, char* serial, int argc, char** argv)
{
    /* if the user choose the -k option, we refuse to do it until devices are
       out with the option to uninstall the remaining data somehow (adb/ui) */
    if (argc == 3 && strcmp(argv[1], "-k") == 0)
    {
        printf(
            "The -k option uninstalls the application while retaining the data/cache.\n"
            "At the moment, there is no way to remove the remaining data.\n"
            "You will have to reinstall the application with the same signature, and fully uninstall it.\n"
            "If you truly wish to continue, execute 'adb shell pm uninstall -k %s'\n", argv[2]);
        return -1;
    }

    /* 'adb uninstall' takes the same arguments as 'pm uninstall' on device */
    return pm_command(transport, serial, argc, argv);
}

static int delete_file(transport_type transport, char* serial, char* filename)
{
    char buf[4096];
    char* quoted;

    snprintf(buf, sizeof(buf), "shell:rm ");
    quoted = dupAndQuote(filename);
    strncat(buf, quoted, sizeof(buf)-1);
    free(quoted);

    send_shellcommand(transport, serial, buf);
    return 0;
}

int install_app(transport_type transport, char* serial, int argc, char** argv)
{
    struct stat st;
    int err;
    const char *const WHERE = "/data/local/tmp/%s";
    char to[PATH_MAX];
    char* filename = argv[argc - 1];
    const char* p;

    p = adb_dirstop(filename);
    if (p) {
        p++;
        snprintf(to, sizeof to, WHERE, p);
    } else {
        snprintf(to, sizeof to, WHERE, filename);
    }
    if (p[0] == '\0') {
    }

    err = stat(filename, &st);
    if (err != 0) {
        fprintf(stderr, "can't find '%s' to install\n", filename);
        return 1;
    }
    if (!S_ISREG(st.st_mode)) {
        fprintf(stderr, "can't install '%s' because it's not a file\n",
                filename);
        return 1;
    }

    if (!(err = do_sync_push(filename, to, 1 /* verify APK */))) {
        /* file in place; tell the Package Manager to install it */
        argv[argc - 1] = to;       /* destination name, not source location */
        pm_command(transport, serial, argc, argv);
        delete_file(transport, serial, to);
    }

    return err;
}