int 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;
struct stat remotestat;
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, 1, resume, NULL);
fprintf(stderr, "Can't open directory %s: %s\n", path, strerror(errno));
return 0;
}
while(*relname == '/')relname++;
mkdir(relname, 0755);
tmpname = strdup(name);
while((dirent = smbc_readdir(dirhandle))) {
char *newname;
if(!strcmp(dirent->name, ".") || !strcmp(dirent->name, ".."))continue;
asprintf(&newname, "%s/%s", tmpname, dirent->name);
switch(dirent->smbc_type) {
case SMBC_DIR:
smb_download_dir(base, newname, resume);
break;
case SMBC_WORKGROUP:
smb_download_dir("smb://", dirent->name, resume);
break;
case SMBC_SERVER:
smb_download_dir("smb://", dirent->name, resume);
break;
case SMBC_FILE:
smb_download_file(base, newname, 1, resume, NULL);
break;
case SMBC_FILE_SHARE:
smb_download_dir(base, newname, resume);
break;
case SMBC_PRINTER_SHARE:
if(!quiet)printf("Ignoring printer share %s\n", dirent->name);
break;
case SMBC_COMMS_SHARE:
if(!quiet)printf("Ignoring comms share %s\n", dirent->name);
break;
case SMBC_IPC_SHARE:
if(!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;
}
free(newname);
}
free(tmpname);
if(keep_permissions) {
if(smbc_fstat(dirhandle, &remotestat) < 0) {
fprintf(stderr, "Unable to get stats on %s on remote server\n", path);
smbc_closedir(dirhandle);
return 0;
}
if(chmod(relname, remotestat.st_mode) < 0) {
fprintf(stderr, "Unable to change mode of local dir %s to %o\n", relname, remotestat.st_mode);
smbc_closedir(dirhandle);
return 0;
}
}
smbc_closedir(dirhandle);
return 1;
}
int smb_download_file(const char *base, const char *name, int recursive, int resume, char *outfile) {
int remotehandle, localhandle;
time_t start_time = time(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;
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 0;
}
smb_download_dir(base, name, resume);
return 0;
case ENOENT:
fprintf(stderr, "%s can't be found on the remote server\n", path);
return 0;
case ENOMEM:
fprintf(stderr, "Not enough memory\n");
exit(1);
return 0;
case ENODEV:
fprintf(stderr, "The share name used in %s does not exist\n", path);
return 0;
case EACCES:
fprintf(stderr, "You don't have enough permissions to access %s\n", path);
return 0;
default:
perror("smbc_open");
return 0;
}
}
if(smbc_fstat(remotehandle, &remotestat) < 0) {
fprintf(stderr, "Can't stat %s: %s\n", path, strerror(errno));
return 0;
}
if(outfile) newpath = outfile;
else if(!name[0]) {
newpath = strrchr(base, '/');
if(newpath)newpath++; else newpath = base;
} else newpath = name;
if(newpath[0] == '/')newpath++;
/* Open local file and, if necessary, resume */
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 0;
}
fstat(localhandle, &localstat);
start_offset = localstat.st_size;
if(localstat.st_size && localstat.st_size == remotestat.st_size) {
if(verbose)fprintf(stderr, "%s is already downloaded completely.\n", path);
else if(!quiet)fprintf(stderr, "%s\n", path);
smbc_close(remotehandle);
close(localhandle);
return 1;
}
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(verbose)printf("Trying to start resume of %s at "OFF_T_FORMAT"\n"
"At the moment "OFF_T_FORMAT" of "OFF_T_FORMAT" bytes have been retrieved\n", newpath, offset_check,
localstat.st_size, 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 "OFF_T_FORMAT" in local file %s\n", offset_check, newpath);
smbc_close(remotehandle); close(localhandle);
return 0;
}
off2 = smbc_lseek(remotehandle, offset_check, SEEK_SET);
if(off2 < 0) {
fprintf(stderr, "Can't seek to "OFF_T_FORMAT" in remote file %s\n", offset_check, newpath);
smbc_close(remotehandle); close(localhandle);
return 0;
}
if(off1 != off2) {
fprintf(stderr, "Offset in local and remote files is different (local: "OFF_T_FORMAT", remote: "OFF_T_FORMAT")\n", off1, off2);
return 0;
}
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 0;
}
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 0;
}
if(memcmp(checkbuf[0], checkbuf[1], RESUME_CHECK_SIZE) == 0) {
if(verbose)printf("Current local and remote file appear to be the same. Starting download from offset "OFF_T_FORMAT"\n", 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 0;
}
}
readbuf = malloc(blocksize);
/* Now, download all bytes from offset_download to the end */
for(curpos = offset_download; curpos < remotestat.st_size; curpos+=blocksize) {
ssize_t bytesread = smbc_read(remotehandle, readbuf, blocksize);
if(bytesread < 0) {
fprintf(stderr, "Can't read %d bytes at offset "OFF_T_FORMAT", file %s\n", blocksize, curpos, path);
smbc_close(remotehandle); close(localhandle);
free(readbuf);
return 0;
}
total_bytes += bytesread;
if(write(localhandle, readbuf, bytesread) < 0) {
fprintf(stderr, "Can't write %d bytes to local file %s at offset "OFF_T_FORMAT"\n", bytesread, path, curpos);
free(readbuf);
smbc_close(remotehandle); close(localhandle);
return 0;
}
if(dots)fputc('.', stderr);
else if(!quiet) {
print_progress(newpath, start_time, time(NULL), start_offset, curpos, remotestat.st_size);
}
}
free(readbuf);
if(dots){
fputc('\n', stderr);
printf("%s downloaded\n", path);
} else if(!quiet) {
int i;
fprintf(stderr, "\r%s", path);
if(columns) {
for(i = strlen(path); i < columns; i++) {
fputc(' ', stderr);
}
}
fputc('\n', stderr);
}
if(keep_permissions) {
if(fchmod(localhandle, remotestat.st_mode) < 0) {
fprintf(stderr, "Unable to change mode of local file %s to %o\n", path, remotestat.st_mode);
smbc_close(remotehandle);
close(localhandle);
return 0;
}
}
smbc_close(remotehandle);
close(localhandle);
return 1;
}
int main(int argc, const char **argv)
{
int c = 0;
const char *file = NULL;
char *rcfile = NULL;
bool smb_encrypt = false;
int resume = 0, recursive = 0;
TALLOC_CTX *frame = talloc_stackframe();
struct poptOption long_options[] = {
{"guest", 'a', POPT_ARG_NONE, NULL, 'a', "Work as user guest" },
{"encrypt", 'e', POPT_ARG_NONE, NULL, 'e', "Encrypt SMB transport (UNIX extended servers only)" },
{"resume", 'r', POPT_ARG_NONE, &resume, 0, "Automatically resume aborted files" },
{"update", 'U', POPT_ARG_NONE, &update, 0, "Download only when remote file is newer than local file or local file is missing"},
{"recursive", 'R', POPT_ARG_NONE, &recursive, 0, "Recursively download files" },
{"username", 'u', POPT_ARG_STRING, &username, 'u', "Username to use" },
{"password", 'p', POPT_ARG_STRING, &password, 'p', "Password to use" },
{"workgroup", 'w', POPT_ARG_STRING, &workgroup, 'w', "Workgroup to use (optional)" },
{"nonprompt", 'n', POPT_ARG_NONE, &nonprompt, 'n', "Don't ask anything (non-interactive)" },
{"debuglevel", 'd', POPT_ARG_INT, &debuglevel, 'd', "Debuglevel to use" },
{"outputfile", 'o', POPT_ARG_STRING, &outputfile, 'o', "Write downloaded data to specified file" },
{"stdout", 'O', POPT_ARG_NONE, &send_stdout, 'O', "Write data to stdout" },
{"dots", 'D', POPT_ARG_NONE, &dots, 'D', "Show dots as progress indication" },
{"quiet", 'q', POPT_ARG_NONE, &quiet, 'q', "Be quiet" },
{"verbose", 'v', POPT_ARG_NONE, &verbose, 'v', "Be verbose" },
{"keep-permissions", 'P', POPT_ARG_NONE, &keep_permissions, 'P', "Keep permissions" },
{"blocksize", 'b', POPT_ARG_INT, &blocksize, 'b', "Change number of bytes in a block"},
{"rcfile", 'f', POPT_ARG_STRING, NULL, 'f', "Use specified rc file"},
POPT_AUTOHELP
POPT_TABLEEND
};
poptContext pc;
load_case_tables();
/* only read rcfile if it exists */
if (asprintf(&rcfile, "%s/.smbgetrc", getenv("HOME")) == -1) {
return 1;
}
if(access(rcfile, F_OK) == 0)
readrcfile(rcfile, long_options);
free(rcfile);
#ifdef SIGWINCH
signal(SIGWINCH, change_columns);
#endif
signal(SIGINT, signal_quit);
signal(SIGTERM, signal_quit);
pc = poptGetContext(argv[0], argc, argv, long_options, 0);
while((c = poptGetNextOpt(pc)) >= 0) {
switch(c) {
case 'f':
readrcfile(poptGetOptArg(pc), long_options);
break;
case 'a':
username = ""; password = "";
break;
case 'e':
smb_encrypt = true;
break;
}
}
if((send_stdout || resume || outputfile) && update) {
fprintf(stderr, "The -o, -R or -O and -U options can not be used together.\n");
return 1;
}
if((send_stdout || outputfile) && recursive) {
fprintf(stderr, "The -o or -O and -R options can not be used together.\n");
return 1;
}
if(outputfile && send_stdout) {
fprintf(stderr, "The -o and -O options cannot be used together.\n");
return 1;
}
if(smbc_init(get_auth_data, debuglevel) < 0) {
fprintf(stderr, "Unable to initialize libsmbclient\n");
return 1;
}
if (smb_encrypt) {
SMBCCTX *smb_ctx = smbc_set_context(NULL);
smbc_option_set(smb_ctx,
CONST_DISCARD(char *, "smb_encrypt_level"),
"require");
}
columns = get_num_cols();
total_start_time = time(NULL);
while ( (file = poptGetArg(pc)) ) {
if (!recursive)
return smb_download_file(file, "", recursive, resume, outputfile);
else
return smb_download_dir(file, "", resume);
}
clean_exit();
TALLOC_FREE(frame);
return 0;
}
