talloc: release 2.4.2

[Samba.git] / source3 / utils / smbget.c

/*
   smbget: a wget-like utility with support for recursive downloading of
        smb:// urls
   Copyright (C) 2003-2004 Jelmer Vernooij <jelmer@samba.org>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "includes.h"
#include "system/filesys.h"
#include "lib/cmdline/cmdline.h"
#include "lib/param/param.h"
#include "libsmbclient.h"
#include "cmdline_contexts.h"
#include "auth/credentials/credentials.h"
#include "auth/gensec/gensec.h"

static int columns = 0;

static time_t total_start_time = 0;
static off_t total_bytes = 0;

#define SMB_MAXPATHLEN MAXPATHLEN

/*
 * Number of bytes to read when checking whether local and remote file
 * are really the same file
 */
#define RESUME_CHECK_SIZE       512
#define RESUME_DOWNLOAD_OFFSET  1024
#define RESUME_CHECK_OFFSET     (RESUME_DOWNLOAD_OFFSET+RESUME_CHECK_SIZE)
/* Number of bytes to read at once */
#define SMB_DEFAULT_BLOCKSIZE   64000

struct opt {
        char *outputfile;
        size_t blocksize;

        int quiet;
        int dots;
        int verbose;
        int send_stdout;
        int update;
        unsigned limit_rate;
};
static struct opt opt = { .blocksize = SMB_DEFAULT_BLOCKSIZE };

static bool smb_download_file(const char *base, const char *name,
                              bool recursive, bool resume, bool toplevel,
                              char *outfile);

static int get_num_cols(void)
{
#ifdef TIOCGWINSZ
        struct winsize ws;
        if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) < 0) {
                return 0;
        }
        return ws.ws_col;
#else
#warning No support for TIOCGWINSZ
        char *cols = getenv("COLUMNS");
        if (!cols) {
                return 0;
        }
        return atoi(cols);
#endif
}

static void change_columns(int sig)
{
        columns = get_num_cols();
}

static void human_readable(off_t s, char *buffer, int l)
{
        if (s > 1024 * 1024 * 1024) {
                snprintf(buffer, l, "%.2fGB", 1.0 * s / (1024 * 1024 * 1024));
        } else if (s > 1024 * 1024) {
                snprintf(buffer, l, "%.2fMB", 1.0 * s / (1024 * 1024));
        } else if (s > 1024) {
                snprintf(buffer, l, "%.2fkB", 1.0 * s / 1024);
        } else {
                snprintf(buffer, l, "%jdb", (intmax_t)s);
        }
}

/*
 * Authentication callback for libsmbclient.
 *
 * The command line parser will take care asking for a password interactively!
 */
static void get_auth_data_with_context_fn(SMBCCTX *ctx,
                                          const char *srv,
                                          const char *shr,
                                          char *dom,
                                          int dom_len,
                                          char *usr,
                                          int usr_len,
                                          char *pwd,
                                          int pwd_len)
{
        struct cli_credentials *creds = samba_cmdline_get_creds();
        const char *username = NULL;
        const char *password = NULL;
        const char *domain = NULL;
        enum credentials_obtained obtained = CRED_UNINITIALISED;

        domain = cli_credentials_get_domain_and_obtained(creds, &obtained);
        if (domain != NULL) {
                bool overwrite = false;
                if (dom[0] == '\0') {
                        overwrite = true;
                }
                if (obtained >= CRED_CALLBACK_RESULT) {
                        overwrite = true;
                }
                if (overwrite) {
                        strncpy(dom, domain, dom_len - 1);
                }
        }
        cli_credentials_set_domain(creds, dom, obtained);

        username = cli_credentials_get_username_and_obtained(creds, &obtained);
        if (username != NULL) {
                bool overwrite = false;
                if (usr[0] == '\0') {
                        overwrite = true;
                }
                if (obtained >= CRED_CALLBACK_RESULT) {
                        overwrite = true;
                }
                if (overwrite) {
                        strncpy(usr, username, usr_len - 1);
                }
        }
        cli_credentials_set_username(creds, usr, obtained);

        password = cli_credentials_get_password_and_obtained(creds, &obtained);
        if (password != NULL) {
                bool overwrite = false;
                if (pwd[0] == '\0') {
                        overwrite = true;
                }
                if (obtained >= CRED_CALLBACK_RESULT) {
                        overwrite = true;
                }
                if (overwrite) {
                        strncpy(pwd, password, pwd_len - 1);
                }
        }
        cli_credentials_set_password(creds, pwd, obtained);

        smbc_set_credentials_with_fallback(ctx, dom, usr, pwd);

        if (!opt.quiet) {
                if (usr[0] == '\0') {
                        printf("Using guest user\n");
                } else if (dom[0] == '\0') {
                        printf("Using user: %s\n", usr);
                } else {
                        printf("Using domain: %s, user: %s\n", dom, usr);
                }
        }
}

static bool smb_download_dir(const char *base, const char *name, int resume)
{
        char path[SMB_MAXPATHLEN];
        int dirhandle;
        struct smbc_dirent *dirent;
        const char *relname = name;
        char *tmpname;
        bool ok = false;

        snprintf(path, SMB_MAXPATHLEN-1, "%s%s%s", base,
                 (base[0] && name[0] && name[0] != '/' &&
                  base[strlen(base)-1] != '/') ? "/" : "",
                 name);

        /* List files in directory and call smb_download_file on them */
        dirhandle = smbc_opendir(path);
        if (dirhandle < 1) {
                if (errno == ENOTDIR) {
                        return smb_download_file(base, name, true, resume,
                                                 false, NULL);
                }
                fprintf(stderr, "Can't open directory %s: %s\n", path,
                        strerror(errno));
                return false;
        }

        while (*relname == '/') {
                relname++;
        }

        if (strlen(relname) > 0) {
                int rc = mkdir(relname, 0755);
                if (rc == -1 && errno != EEXIST) {
                        fprintf(stderr, "Can't create directory %s: %s\n",
                                relname, strerror(errno));
                        return false;
                }
        }

        tmpname = SMB_STRDUP(name);

        while ((dirent = smbc_readdir(dirhandle))) {
                char *newname;
                if (!strcmp(dirent->name, ".") || !strcmp(dirent->name, "..")) {
                        ok = true;
                        continue;
                }
                if (asprintf(&newname, "%s/%s", tmpname, dirent->name) == -1) {
                        free(tmpname);
                        return false;
                }
                switch (dirent->smbc_type) {
                case SMBC_DIR:
                        ok = smb_download_dir(base, newname, resume);
                        break;

                case SMBC_WORKGROUP:
                        ok = smb_download_dir("smb://", dirent->name, resume);
                        break;

                case SMBC_SERVER:
                        ok = smb_download_dir("smb://", dirent->name, resume);
                        break;

                case SMBC_FILE:
                        ok = smb_download_file(base, newname, true, resume,
                                                false, NULL);
                        break;

                case SMBC_FILE_SHARE:
                        ok = smb_download_dir(base, newname, resume);
                        break;

                case SMBC_PRINTER_SHARE:
                        if (!opt.quiet) {
                                printf("Ignoring printer share %s\n",
                                       dirent->name);
                        }
                        break;

                case SMBC_COMMS_SHARE:
                        if (!opt.quiet) {
                                printf("Ignoring comms share %s\n",
                                       dirent->name);
                        }
                        break;

                case SMBC_IPC_SHARE:
                        if (!opt.quiet) {
                                printf("Ignoring ipc$ share %s\n",
                                       dirent->name);
                        }
                        break;

                default:
                        fprintf(stderr, "Ignoring file '%s' of type '%d'\n",
                                newname, dirent->smbc_type);
                        break;
                }

                if (!ok) {
                        fprintf(stderr, "Failed to download %s: %s\n",
                                newname, strerror(errno));
                        free(newname);
                        free(tmpname);
                        return false;
                }
                free(newname);
        }
        free(tmpname);

        smbc_closedir(dirhandle);
        return ok;
}

static char *print_time(long t)
{
        static char buffer[100];
        int secs, mins, hours;
        if (t < -1) {
                strncpy(buffer, "Unknown", sizeof(buffer));
                return buffer;
        }

        secs = (int)t % 60;
        mins = (int)t / 60 % 60;
        hours = (int)t / (60 * 60);
        snprintf(buffer, sizeof(buffer) - 1, "%02d:%02d:%02d", hours, mins,
                 secs);
        return buffer;
}

static void print_progress(const char *name, time_t start, time_t now,
                           off_t start_pos, off_t pos, off_t total)
{
        double avg = 0.0;
        long eta = -1;
        double prcnt = 0.0;
        char hpos[22], htotal[22], havg[22];
        char *status, *filename;
        int len;
        if (now - start) {
                avg = 1.0 * (pos - start_pos) / (now - start);
        }
        eta = (total - pos) / avg;
        if (total) {
                prcnt = 100.0 * pos / total;
        }

        human_readable(pos, hpos, sizeof(hpos));
        human_readable(total, htotal, sizeof(htotal));
        human_readable(avg, havg, sizeof(havg));

        len = asprintf(&status, "%s of %s (%.2f%%) at %s/s ETA: %s", hpos,
                       htotal, prcnt, havg, print_time(eta));
        if (len == -1) {
                return;
        }

        if (columns) {
                int required = strlen(name),
                    available = columns - len - strlen("[] ");
                if (required > available) {
                        if (asprintf(&filename, "...%s",
                                     name + required - available + 3) == -1) {
                                return;
                        }
                } else {
                        filename = SMB_STRNDUP(name, available);
                }
        } else {
                filename = SMB_STRDUP(name);
        }

        fprintf(stderr, "\r[%s] %s", filename, status);

        free(filename);
        free(status);
}

/* Return false on error, true on success. */

static bool smb_download_file(const char *base, const char *name,
                              bool recursive, bool resume, bool toplevel,
                              char *outfile)
{
        int remotehandle, localhandle;
        time_t start_time = time_mono(NULL);
        const char *newpath;
        char path[SMB_MAXPATHLEN];
        char checkbuf[2][RESUME_CHECK_SIZE];
        char *readbuf = NULL;
        off_t offset_download = 0, offset_check = 0, curpos = 0,
              start_offset = 0;
        struct stat localstat, remotestat;
        clock_t start_of_bucket_ticks = 0;
        size_t bytes_in_bucket = 0;
        size_t bucket_size = 0;
        clock_t ticks_to_fill_bucket = 0;

        snprintf(path, SMB_MAXPATHLEN-1, "%s%s%s", base,
                 (*base && *name && name[0] != '/' &&
                  base[strlen(base)-1] != '/') ? "/" : "",
                 name);

        remotehandle = smbc_open(path, O_RDONLY, 0755);

        if (remotehandle < 0) {
                switch (errno) {
                case EISDIR:
                        if (!recursive) {
                                fprintf(stderr,
                                        "%s is a directory. Specify -R "
                                        "to download recursively\n",
                                        path);
                                return false;
                        }
                        return smb_download_dir(base, name, resume);

                case ENOENT:
                        fprintf(stderr,
                                "%s can't be found on the remote server\n",
                                path);
                        return false;

                case ENOMEM:
                        fprintf(stderr, "Not enough memory\n");
                        return false;

                case ENODEV:
                        fprintf(stderr,
                                "The share name used in %s does not exist\n",
                                path);
                        return false;

                case EACCES:
                        fprintf(stderr, "You don't have enough permissions "
                                "to access %s\n",
                                path);
                        return false;

                default:
                        perror("smbc_open");
                        return false;
                }
        }

        if (smbc_fstat(remotehandle, &remotestat) < 0) {
                fprintf(stderr, "Can't stat %s: %s\n", path, strerror(errno));
                return false;
        }

        if (outfile) {
                newpath = outfile;
        } else if (!name[0]) {
                newpath = strrchr(base, '/');
                if (newpath) {
                        newpath++;
                } else {
                        newpath = base;
                }
        } else {
                newpath = name;
        }

        if (!toplevel && (newpath[0] == '/')) {
                newpath++;
        }

        /* Open local file according to the mode */
        if (opt.update) {
                /* if it is up-to-date, skip */
                if (stat(newpath, &localstat) == 0 &&
                    localstat.st_mtime >= remotestat.st_mtime) {
                        if (opt.verbose) {
                                printf("%s is up-to-date, skipping\n", newpath);
                        }
                        smbc_close(remotehandle);
                        return true;
                }
                /* else open it for writing and truncate if it exists */
                localhandle = open(
                    newpath, O_CREAT | O_NONBLOCK | O_RDWR | O_TRUNC, 0775);
                if (localhandle < 0) {
                        fprintf(stderr, "Can't open %s : %s\n", newpath,
                                strerror(errno));
                        smbc_close(remotehandle);
                        return false;
                }
                /* no offset */
        } else if (!opt.send_stdout) {
                localhandle = open(newpath, O_CREAT | O_NONBLOCK | O_RDWR |
                                                (!resume ? O_EXCL : 0),
                                   0755);
                if (localhandle < 0) {
                        fprintf(stderr, "Can't open %s: %s\n", newpath,
                                strerror(errno));
                        smbc_close(remotehandle);
                        return false;
                }

                if (fstat(localhandle, &localstat) != 0) {
                        fprintf(stderr, "Can't fstat %s: %s\n", newpath,
                                strerror(errno));
                        smbc_close(remotehandle);
                        close(localhandle);
                        return false;
                }

                start_offset = localstat.st_size;

                if (localstat.st_size &&
                    localstat.st_size == remotestat.st_size) {
                        if (opt.verbose) {
                                fprintf(stderr, "%s is already downloaded "
                                        "completely.\n",
                                        path);
                        } else if (!opt.quiet) {
                                fprintf(stderr, "%s\n", path);
                        }
                        smbc_close(remotehandle);
                        close(localhandle);
                        return true;
                }

                if (localstat.st_size > RESUME_CHECK_OFFSET &&
                    remotestat.st_size > RESUME_CHECK_OFFSET) {
                        offset_download =
                            localstat.st_size - RESUME_DOWNLOAD_OFFSET;
                        offset_check = localstat.st_size - RESUME_CHECK_OFFSET;
                        if (opt.verbose) {
                                printf("Trying to start resume of %s at %jd\n"
                                       "At the moment %jd of %jd bytes have "
                                       "been retrieved\n",
                                       newpath, (intmax_t)offset_check,
                                       (intmax_t)localstat.st_size,
                                       (intmax_t)remotestat.st_size);
                        }
                }

                if (offset_check) {
                        off_t off1, off2;
                        /* First, check all bytes from offset_check to
                         * offset_download */
                        off1 = lseek(localhandle, offset_check, SEEK_SET);
                        if (off1 < 0) {
                                fprintf(stderr,
                                        "Can't seek to %jd in local file %s\n",
                                        (intmax_t)offset_check, newpath);
                                smbc_close(remotehandle);
                                close(localhandle);
                                return false;
                        }

                        off2 = smbc_lseek(remotehandle, offset_check, SEEK_SET);
                        if (off2 < 0) {
                                fprintf(stderr,
                                        "Can't seek to %jd in remote file %s\n",
                                        (intmax_t)offset_check, newpath);
                                smbc_close(remotehandle);
                                close(localhandle);
                                return false;
                        }

                        if (off1 != off2) {
                                fprintf(stderr, "Offset in local and remote "
                                        "files are different "
                                        "(local: %jd, remote: %jd)\n",
                                        (intmax_t)off1, (intmax_t)off2);
                                smbc_close(remotehandle);
                                close(localhandle);
                                return false;
                        }

                        if (smbc_read(remotehandle, checkbuf[0],
                                      RESUME_CHECK_SIZE) != RESUME_CHECK_SIZE) {
                                fprintf(stderr, "Can't read %d bytes from "
                                        "remote file %s\n",
                                        RESUME_CHECK_SIZE, path);
                                smbc_close(remotehandle);
                                close(localhandle);
                                return false;
                        }

                        if (read(localhandle, checkbuf[1], RESUME_CHECK_SIZE) !=
                            RESUME_CHECK_SIZE) {
                                fprintf(stderr, "Can't read %d bytes from "
                                        "local file %s\n",
                                        RESUME_CHECK_SIZE, name);
                                smbc_close(remotehandle);
                                close(localhandle);
                                return false;
                        }

                        if (memcmp(checkbuf[0], checkbuf[1],
                                   RESUME_CHECK_SIZE) == 0) {
                                if (opt.verbose) {
                                        printf("Current local and remote file "
                                               "appear to be the same. "
                                               "Starting download from "
                                               "offset %jd\n",
                                               (intmax_t)offset_download);
                                }
                        } else {
                                fprintf(stderr, "Local and remote file appear "
                                        "to be different, not "
                                        "doing resume for %s\n",
                                        path);
                                smbc_close(remotehandle);
                                close(localhandle);
                                return false;
                        }
                }
        } else {
                localhandle = STDOUT_FILENO;
                start_offset = 0;
                offset_download = 0;
                offset_check = 0;
        }

        /* We implement rate limiting by filling up a bucket with bytes and
         * checking, once the bucket is filled, if it was filled too fast.
         * If so, we sleep for some time to get an average transfer rate that
         * equals to the one set by the user.
         *
         * The bucket size directly affects the traffic characteristics.
         * The smaller the bucket the more frequent the pause/resume cycle.
         * A large bucket can result in burst of high speed traffic and large
         * pauses. A cycle of 100ms looks like a good value. This value (in
         * ticks) is held in `ticks_to_fill_bucket`. The `bucket_size` is
         * calculated as:
         * `limit_rate * 1024 * / (CLOCKS_PER_SEC / ticks_to_fill_bucket)`
         *
         * After selecting the bucket size we also need to check the blocksize
         * of the transfer, since this is the minimum unit of traffic that we
         * can observe. Achieving a ~10% precision requires a blocksize with a
         * maximum size of `bucket_size / 10`.
         */
        if (opt.limit_rate > 0) {
                unsigned max_block_size;
                /* This is the time that the bucket should take to fill. */
                ticks_to_fill_bucket = 100 /*ms*/ * CLOCKS_PER_SEC / 1000;
                /* This is the size of the bucket in bytes.
                 * If we fill the bucket too quickly we should pause */
                bucket_size = opt.limit_rate * 1024 / (CLOCKS_PER_SEC / ticks_to_fill_bucket);
                max_block_size = bucket_size / 10;
                max_block_size = max_block_size > 0 ? max_block_size : 1;
                if (opt.blocksize > max_block_size) {
                        if (opt.blocksize != SMB_DEFAULT_BLOCKSIZE) {
                                fprintf(stderr,
                                        "Warning: Overriding block size to %d "
                                        "due to limit-rate", max_block_size);
                        }
                        opt.blocksize = max_block_size;
                }
                start_of_bucket_ticks = clock();
        }

        readbuf = (char *)SMB_MALLOC(opt.blocksize);
        if (!readbuf) {
                fprintf(stderr, "Failed to allocate %zu bytes for read "
                                "buffer (%s)", opt.blocksize, strerror(errno));
                if (localhandle != STDOUT_FILENO) {
                        close(localhandle);
                }
                return false;
        }

        /* Now, download all bytes from offset_download to the end */
        for (curpos = offset_download; curpos < remotestat.st_size;
             curpos += opt.blocksize) {
                ssize_t bytesread;
                ssize_t byteswritten;

                /* Rate limiting. This pauses the transfer to limit traffic. */
                if (opt.limit_rate > 0) {
                        if (bytes_in_bucket > bucket_size) {
                                clock_t now_ticks = clock();
                                clock_t diff_ticks = now_ticks
                                                     - start_of_bucket_ticks;
                                /* Check if the bucket filled up too fast. */
                                if (diff_ticks < ticks_to_fill_bucket) {
                                        /* Pause until `ticks_to_fill_bucket` */
                                        double sleep_us
                                         = (ticks_to_fill_bucket - diff_ticks)
                                          * 1000000.0 / CLOCKS_PER_SEC;
                                        usleep(sleep_us);
                                }
                                /* Reset the byte counter and the ticks. */
                                bytes_in_bucket = 0;
                                start_of_bucket_ticks = clock();
                        }
                }

                bytesread = smbc_read(remotehandle, readbuf, opt.blocksize);
                if (opt.limit_rate > 0) {
                        bytes_in_bucket += bytesread;
                }
                if(bytesread < 0) {
                        fprintf(stderr,
                                "Can't read %zu bytes at offset %jd, file %s\n",
                                opt.blocksize, (intmax_t)curpos, path);
                        smbc_close(remotehandle);
                        if (localhandle != STDOUT_FILENO) {
                                close(localhandle);
                        }
                        free(readbuf);
                        return false;
                }

                total_bytes += bytesread;

                byteswritten = write(localhandle, readbuf, bytesread);
                if (byteswritten != bytesread) {
                        fprintf(stderr,
                                "Can't write %zd bytes to local file %s at "
                                "offset %jd\n", bytesread, path,
                                (intmax_t)curpos);
                        free(readbuf);
                        smbc_close(remotehandle);
                        if (localhandle != STDOUT_FILENO) {
                                close(localhandle);
                        }
                        return false;
                }

                if (opt.dots) {
                        fputc('.', stderr);
                } else if (!opt.quiet) {
                        print_progress(newpath, start_time, time_mono(NULL),
                                       start_offset, curpos,
                                       remotestat.st_size);
                }
        }

        free(readbuf);

        if (opt.dots) {
                fputc('\n', stderr);
                printf("%s downloaded\n", path);
        } else if (!opt.quiet) {
                int i;
                fprintf(stderr, "\r%s", path);
                if (columns) {
                        for (i = strlen(path); i < columns; i++) {
                                fputc(' ', stderr);
                        }
                }
                fputc('\n', stderr);
        }

        smbc_close(remotehandle);
        if (localhandle != STDOUT_FILENO) {
                close(localhandle);
        }
        return true;
}

static void clean_exit(void)
{
        char bs[100];
        human_readable(total_bytes, bs, sizeof(bs));
        if (!opt.quiet) {
                fprintf(stderr, "Downloaded %s in %lu seconds\n", bs,
                        (unsigned long)(time_mono(NULL) - total_start_time));
        }
        exit(0);
}

static void signal_quit(int v)
{
        clean_exit();
}

int main(int argc, char **argv)
{
        int c = 0;
        const char *file = NULL;
        int smb_encrypt = false;
        int resume = 0, recursive = 0;
        TALLOC_CTX *frame = talloc_stackframe();
        bool ok = false;
        const char **argv_const = discard_const_p(const char *, argv);
        struct poptOption long_options[] = {
                POPT_AUTOHELP

                {
                        .longName   = "guest",
                        .shortName  = 'a',
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = NULL,
                        .val        = 'a',
                        .descrip    = "Work as user guest"
                },
                {
                        .longName   = "encrypt",
                        .shortName  = 'e',
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &smb_encrypt,
                        .val        = 1,
                        .descrip    = "Encrypt SMB transport"
                },
                {
                        .longName   = "resume",
                        .shortName  = 'r',
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &resume,
                        .val        = 1,
                        .descrip    = "Automatically resume aborted files"
                },
                {
                        .longName   = "update",
                        .shortName  = 'u',
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &opt.update,
                        .val        = 1,
                        .descrip    = "Download only when remote file is "
                                      "newer than local file or local file "
                                      "is missing"
                },
                {
                        .longName   = "recursive",
                        .shortName  = 0,
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &recursive,
                        .val        = true,
                        .descrip    = "Recursively download files"
                },
                {
                        .longName   = "blocksize",
                        .shortName  = 'b',
                        .argInfo    = POPT_ARG_INT,
                        .arg        = &opt.blocksize,
                        .val        = 'b',
                        .descrip    = "Change number of bytes in a block"
                },

                {
                        .longName   = "outputfile",
                        .shortName  = 'o',
                        .argInfo    = POPT_ARG_STRING,
                        .arg        = &opt.outputfile,
                        .val        = 'o',
                        .descrip    = "Write downloaded data to specified file"
                },
                {
                        .longName   = "stdout",
                        .shortName  = 0,
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &opt.send_stdout,
                        .val        = true,
                        .descrip    = "Write data to stdout"
                },
                {
                        .longName   = "dots",
                        .shortName  = 'D',
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &opt.dots,
                        .val        = 1,
                        .descrip    = "Show dots as progress indication"
                },
                {
                        .longName   = "quiet",
                        .shortName  = 'q',
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &opt.quiet,
                        .val        = 1,
                        .descrip    = "Be quiet"
                },
                {
                        .longName   = "verbose",
                        .shortName  = 'v',
                        .argInfo    = POPT_ARG_NONE,
                        .arg        = &opt.verbose,
                        .val        = 1,
                        .descrip    = "Be verbose"
                },
                {
                        .longName   = "limit-rate",
                        .shortName  = 0,
                        .argInfo    = POPT_ARG_INT,
                        .arg        = &opt.limit_rate,
                        .val        = 'l',
                        .descrip    = "Limit download speed to this many KB/s"
                },

                POPT_COMMON_SAMBA
                POPT_COMMON_CONNECTION
                POPT_COMMON_CREDENTIALS
                POPT_LEGACY_S3
                POPT_COMMON_VERSION
                POPT_TABLEEND
        };
        poptContext pc = NULL;
        struct cli_credentials *creds = NULL;
        enum smb_encryption_setting encryption_state = SMB_ENCRYPTION_DEFAULT;
        enum credentials_use_kerberos use_kerberos = CRED_USE_KERBEROS_DESIRED;
        smbc_smb_encrypt_level encrypt_level = SMBC_ENCRYPTLEVEL_DEFAULT;
#if 0
        enum smb_signing_setting signing_state = SMB_SIGNING_DEFAULT;
        const char *use_signing = "auto";
#endif
        bool is_nt_hash = false;
        uint32_t gensec_features;
        bool use_wbccache = false;
        SMBCCTX *smb_ctx = NULL;
        int dbg_lvl = -1;
        int rc;

        smb_init_locale();

        ok = samba_cmdline_init(frame,
                                SAMBA_CMDLINE_CONFIG_CLIENT,
                                false);
        if (!ok) {
                goto done;
        }

#ifdef SIGWINCH
        signal(SIGWINCH, change_columns);
#endif
        signal(SIGINT, signal_quit);
        signal(SIGTERM, signal_quit);

        pc = samba_popt_get_context(getprogname(),
                                    argc,
                                    argv_const,
                                    long_options,
                                    0);
        if (pc == NULL) {
                ok = false;
                goto done;
        }

        creds = samba_cmdline_get_creds();

        while ((c = poptGetNextOpt(pc)) != -1) {
                switch (c) {
                case 'a':
                        cli_credentials_set_anonymous(creds);
                        break;
                case POPT_ERROR_BADOPT:
                        fprintf(stderr, "\nInvalid option %s: %s\n\n",
                                poptBadOption(pc, 0), poptStrerror(c));
                        poptPrintUsage(pc, stderr, 0);
                        ok = false;
                        goto done;
                }

                if (c < -1) {
                        fprintf(stderr, "%s: %s\n",
                                poptBadOption(pc, POPT_BADOPTION_NOALIAS),
                                poptStrerror(c));
                        ok = false;
                        goto done;
                }
        }

        if ((opt.send_stdout || resume || opt.outputfile) && opt.update) {
                fprintf(stderr, "The -o, -R or -O and -U options can not be "
                        "used together.\n");
                ok = true;
                goto done;
        }
        if ((opt.send_stdout || opt.outputfile) && recursive) {
                fprintf(stderr, "The -o or -O and -R options can not be "
                        "used together.\n");
                ok = true;
                goto done;
        }

        if (opt.outputfile && opt.send_stdout) {
                fprintf(stderr, "The -o and -O options can not be "
                        "used together.\n");
                ok = true;
                goto done;
        }

        samba_cmdline_burn(argc, argv);

        /* smbc_new_context() will set the log level to 0 */
        dbg_lvl = debuglevel_get();

        smb_ctx = smbc_new_context();
        if (smb_ctx == NULL) {
                fprintf(stderr, "Unable to initialize libsmbclient\n");
                ok = false;
                goto done;
        }
        smbc_setDebug(smb_ctx, dbg_lvl);

        rc = smbc_setConfiguration(smb_ctx, lp_default_path());
        if (rc < 0) {
                ok = false;
                goto done;
        }

        smbc_setFunctionAuthDataWithContext(smb_ctx,
                                            get_auth_data_with_context_fn);

        ok = smbc_init_context(smb_ctx);
        if (!ok) {
                goto done;
        }
        smbc_set_context(smb_ctx);

        encryption_state = cli_credentials_get_smb_encryption(creds);
        switch (encryption_state) {
        case SMB_ENCRYPTION_REQUIRED:
                encrypt_level = SMBC_ENCRYPTLEVEL_REQUIRE;
                break;
        case SMB_ENCRYPTION_DESIRED:
        case SMB_ENCRYPTION_IF_REQUIRED:
                encrypt_level = SMBC_ENCRYPTLEVEL_REQUEST;
                break;
        case SMB_ENCRYPTION_OFF:
                encrypt_level = SMBC_ENCRYPTLEVEL_NONE;
                break;
        case SMB_ENCRYPTION_DEFAULT:
                encrypt_level = SMBC_ENCRYPTLEVEL_DEFAULT;
                break;
        }
        if (smb_encrypt) {
                encrypt_level = SMBC_ENCRYPTLEVEL_REQUIRE;
        }
        smbc_setOptionSmbEncryptionLevel(smb_ctx, encrypt_level);

#if 0
        signing_state = cli_credentials_get_smb_signing(creds);
        if (encryption_state >= SMB_ENCRYPTION_DESIRED) {
                signing_state = SMB_SIGNING_REQUIRED;
        }
        switch (signing_state) {
        case SMB_SIGNING_REQUIRED:
                use_signing = "required";
                break;
        case SMB_SIGNING_DEFAULT:
        case SMB_SIGNING_DESIRED:
        case SMB_SIGNING_IF_REQUIRED:
                use_signing = "yes";
                break;
        case SMB_SIGNING_OFF:
                use_signing = "off";
                break;
        default:
                use_signing = "auto";
                break;
        }
        /* FIXME: There is no libsmbclient function to set signing state */
#endif

        use_kerberos = cli_credentials_get_kerberos_state(creds);
        switch (use_kerberos) {
        case CRED_USE_KERBEROS_REQUIRED:
                smbc_setOptionUseKerberos(smb_ctx, true);
                smbc_setOptionFallbackAfterKerberos(smb_ctx, false);
                break;
        case CRED_USE_KERBEROS_DESIRED:
                smbc_setOptionUseKerberos(smb_ctx, true);
                smbc_setOptionFallbackAfterKerberos(smb_ctx, true);
                break;
        case CRED_USE_KERBEROS_DISABLED:
                smbc_setOptionUseKerberos(smb_ctx, false);
                break;
        }

        /* Check if the password supplied is an NT hash */
        is_nt_hash = cli_credentials_is_password_nt_hash(creds);
        smbc_setOptionUseNTHash(smb_ctx, is_nt_hash);

        /* Check if we should use the winbind ccache */
        gensec_features = cli_credentials_get_gensec_features(creds);
        use_wbccache = (gensec_features & GENSEC_FEATURE_NTLM_CCACHE);
        smbc_setOptionUseCCache(smb_ctx, use_wbccache);

        columns = get_num_cols();

        total_start_time = time_mono(NULL);

        while ((file = poptGetArg(pc))) {
                if (!recursive) {
                        ok = smb_download_file(file, "", recursive, resume,
                                                true, opt.outputfile);
                } else {
                        ok = smb_download_dir(file, "", resume);
                }
        }

done:
        gfree_all();
        poptFreeContext(pc);
        TALLOC_FREE(frame);
        if (ok) {
                clean_exit();
        }
        return ok ? 0 : 1;
}