2 Unix SMB/CIFS implementation.
3 SMB backend for the Common UNIX Printing System ("CUPS")
4 Copyright 1999 by Easy Software Products
5 Copyright Andrew Tridgell 1994-1998
6 Copyright Andrew Bartlett 2002
7 Copyright Rodrigo Fernandez-Vizarra 2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #define PW_MAX_BUF_SIZE sysconf(_SC_GETPW_R_SIZE_MAX)
27 #define TICKET_CC_DIR "/tmp"
28 #define CC_PREFIX "krb5cc_" /* prefix of the ticket cache */
29 #define CC_MAX_FILE_LEN 24
30 #define CC_MAX_FILE_PATH_LEN (sizeof(TICKET_CC_DIR)-1)+ CC_MAX_FILE_LEN+2
32 #define KRB5CCNAME "KRB5CCNAME"
33 #define MAX_RETRY_CONNECT 3
40 extern BOOL in_client; /* Boolean for client library */
47 static void list_devices(void);
48 static struct cli_state *smb_complete_connection(const char *, const char *,int , const char *, const char *, const char *, const char *, int);
49 static struct cli_state *smb_connect(const char *, const char *, int, const char *, const char *, const char *, const char *);
50 static int smb_print(struct cli_state *, char *, FILE *);
54 * 'main()' - Main entry for SMB backend.
57 int /* O - Exit status */
58 main(int argc, /* I - Number of command-line arguments */
59 char *argv[]) /* I - Command-line arguments */
61 int i; /* Looping var */
62 int copies; /* Number of copies */
63 int port; /* Port number */
64 char uri[1024], /* URI */
65 *sep, /* Pointer to separator */
66 *password; /* Password */
67 const char *username, /* Username */
68 *server, /* Server name */
69 *printer; /* Printer name */
70 const char *workgroup; /* Workgroup */
71 FILE *fp; /* File to print */
72 int status=0; /* Status of LPD job */
73 struct cli_state *cli; /* SMB interface */
79 /* we expect the URI in argv[0]. Detect the case where it is in argv[1] and cope */
80 if (argc > 2 && strncmp(argv[0],"smb://", 6) && !strncmp(argv[1],"smb://", 6)) {
88 * NEW! In CUPS 1.1 the backends are run with no arguments to list the
89 * available devices. These can be devices served by this backend
90 * or any other backends (i.e. you can have an SNMP backend that
91 * is only used to enumerate the available network printers... :)
98 if (argc < 6 || argc > 7)
100 fprintf(stderr, "Usage: %s [DEVICE_URI] job-id user title copies options [file]\n",
102 fputs(" The DEVICE_URI environment variable can also contain the\n", stderr);
103 fputs(" destination printer:\n", stderr);
105 fputs(" smb://[username:password@][workgroup/]server[:port]/printer\n", stderr);
110 * If we have 7 arguments, print the file named on the command-line.
111 * Otherwise, print data from stdin...
118 * Print from Copy stdin to a temporary file...
124 else if ((fp = fopen(argv[6], "rb")) == NULL)
126 perror("ERROR: Unable to open print file");
130 copies = atoi(argv[4]);
136 if (getenv("DEVICE_URI") != NULL)
137 strncpy(uri, getenv("DEVICE_URI"), sizeof(uri) - 1);
138 else if (strncmp(argv[0], "smb://", 6) == 0)
139 strncpy(uri, argv[0], sizeof(uri) - 1);
142 fputs("ERROR: No device URI found in DEVICE_URI environment variable or argv[0] !\n", stderr);
146 uri[sizeof(uri) - 1] = '\0';
149 * Extract the destination from the URI...
152 if ((sep = strrchr_m(uri, '@')) != NULL)
160 * Extract password as needed...
163 if ((password = strchr_m(username, ':')) != NULL)
175 if ((sep = strchr_m(server, '/')) == NULL)
177 fputs("ERROR: Bad URI - need printer name!\n", stderr);
184 if ((sep = strchr_m(printer, '/')) != NULL)
187 * Convert to smb://[username:password@]workgroup/server/printer...
199 if ((sep = strrchr_m(server, ':')) != NULL)
210 * Setup the SAMBA server state...
213 setup_logging("smbspool", True);
215 in_client = True; /* Make sure that we tell lp_load we are */
217 if (!lp_load(dyn_CONFIGFILE, True, False, False, True))
219 fprintf(stderr, "ERROR: Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE);
223 if (workgroup == NULL)
224 workgroup = lp_workgroup();
230 if ((cli = smb_connect(workgroup, server, port, printer, username, password, argv[2])) == NULL)
232 if (getenv("CLASS") == NULL)
234 fprintf(stderr, "ERROR: Unable to connect to CIFS host, will retry in 60 seconds...\n");
235 sleep (60); /* should just waiting and retrying fix authentication ??? */
240 fprintf(stderr, "ERROR: Unable to connect to CIFS host, trying next printer...\n");
245 while ((cli == NULL) && (tries < MAX_RETRY_CONNECT));
248 fprintf(stderr, "ERROR: Unable to connect to CIFS host after (tried %d times)\n", tries);
253 * Now that we are connected to the server, ignore SIGTERM so that we
254 * can finish out any page data the driver sends (e.g. to eject the
255 * current page... Only ignore SIGTERM if we are printing data from
256 * stdin (otherwise you can't cancel raw jobs...)
260 CatchSignal(SIGTERM, SIG_IGN);
266 for (i = 0; i < copies; i ++)
267 if ((status = smb_print(cli, argv[3] /* title */, fp)) != 0)
273 * Return the queue status...
281 * 'list_devices()' - List the available printers seen on the network...
288 * Eventually, search the local workgroup for available hosts and printers.
291 puts("network smb \"Unknown\" \"Windows Printer via SAMBA\"");
296 * get the name of the newest ticket cache for the uid user.
297 * pam_krb5 defines a non default ticket cache for each user
300 char * get_ticket_cache( uid_t uid )
302 char *ticket_file = NULL;
303 SMB_STRUCT_DIR *tcdir; /* directory where ticket caches are stored */
304 SMB_STRUCT_DIRENT *dirent; /* directory entry */
305 char *filename = NULL; /* holds file names on the tmp directory */
307 char user_cache_prefix[CC_MAX_FILE_LEN];
308 char file_path[CC_MAX_FILE_PATH_LEN];
311 snprintf(user_cache_prefix, CC_MAX_FILE_LEN, "%s%d", CC_PREFIX, uid );
312 tcdir = sys_opendir( TICKET_CC_DIR );
316 while ( (dirent = sys_readdir( tcdir ) ) )
318 filename = dirent->d_name;
319 snprintf(file_path, CC_MAX_FILE_PATH_LEN,"%s/%s", TICKET_CC_DIR, filename);
320 if (sys_stat(file_path, &buf) == 0 )
322 if ( ( buf.st_uid == uid ) && ( S_ISREG(buf.st_mode) ) )
325 * check the user id of the file to prevent denial of
326 * service attacks by creating fake ticket caches for the
329 if ( strstr( filename, user_cache_prefix ) )
331 if ( buf.st_mtime > t )
334 * a newer ticket cache found
337 ticket_file=SMB_STRDUP(file_path);
347 if ( ticket_file == NULL )
349 /* no ticket cache found */
350 fprintf(stderr, "ERROR: No ticket cache found for userid=%d\n", uid);
357 static struct cli_state
358 *smb_complete_connection(const char *myname,
361 const char *username,
362 const char *password,
363 const char *workgroup,
367 struct cli_state *cli; /* New connection */
370 /* Start the SMB connection */
371 nt_status = cli_start_connection( &cli, myname, server, NULL, port,
372 Undefined, flags, NULL);
373 if (!NT_STATUS_IS_OK(nt_status))
379 if ( (username) && (*username) &&
380 ((!password) || ((password) && (strlen(password) == 0 ))) &&
381 (cli->use_kerberos) )
383 /* Use kerberos authentication */
388 if ( !(pw = sys_getpwnam(username)) ) {
389 fprintf(stderr,"ERROR Can not get %s uid\n", username);
395 * Get the ticket cache of the user to set KRB5CCNAME env
398 cache_file = get_ticket_cache( pw->pw_uid );
399 if ( cache_file == NULL )
401 fprintf(stderr, "ERROR: Can not get the ticket cache for %s\n", username);
406 if ( setenv(KRB5CCNAME, cache_file, OVERWRITE) < 0 )
408 fprintf(stderr, "ERROR: Can not add KRB5CCNAME to the environment");
416 * Change the UID of the process to be able to read the kerberos
424 if (!cli_session_setup(cli, username, password, strlen(password)+1,
425 password, strlen(password)+1,
428 fprintf(stderr,"ERROR: Session setup failed: %s\n", cli_errstr(cli));
429 if (NT_STATUS_V(cli_nt_error(cli)) ==
430 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
432 fprintf(stderr, "did you forget to run kinit?\n");
439 if (!cli_send_tconX(cli, share, "?????", password, strlen(password)+1))
441 fprintf(stderr, "ERROR: Tree connect failed (%s)\n", cli_errstr(cli));
450 * 'smb_connect()' - Return a connection to a server.
453 static struct cli_state * /* O - SMB connection */
454 smb_connect(const char *workgroup, /* I - Workgroup */
455 const char *server, /* I - Server */
456 const int port, /* I - Port */
457 const char *share, /* I - Printer */
458 const char *username, /* I - Username */
459 const char *password, /* I - Password */
460 const char *jobusername) /* I - User who issued the print job */
462 struct cli_state *cli; /* New connection */
463 pstring myname; /* Client name */
467 * Get the names and addresses of the client and server...
472 /* See if we have a username first. This is for backwards compatible
473 behavior with 3.0.14a */
475 if ( username && *username )
477 cli = smb_complete_connection(myname, server, port, username,
478 password, workgroup, share, 0 );
484 * Try to use the user kerberos credentials (if any) to authenticate
486 cli = smb_complete_connection(myname, server, port, jobusername, "",
488 CLI_FULL_CONNECTION_USE_KERBEROS );
490 if (cli ) { return cli; }
492 /* give a chance for a passwordless NTLMSSP session setup */
494 pwd = getpwuid(geteuid());
499 cli = smb_complete_connection(myname, server, port, pwd->pw_name, "",
500 workgroup, share, 0);
502 if (cli) { return cli; }
505 * last try. Use anonymous authentication
508 cli = smb_complete_connection(myname, server, port, "", "",
509 workgroup, share, 0);
511 * Return the new connection...
519 * 'smb_print()' - Queue a job for printing using the SMB protocol.
522 static int /* O - 0 = success, non-0 = failure */
523 smb_print(struct cli_state *cli, /* I - SMB connection */
524 char *title, /* I - Title/job name */
525 FILE *fp) /* I - File to print */
527 int fnum; /* File number */
528 int nbytes, /* Number of bytes read */
529 tbytes; /* Total bytes read */
530 char buffer[8192], /* Buffer for copy */
531 *ptr; /* Pointer into tile */
535 * Sanitize the title...
538 for (ptr = title; *ptr; ptr ++)
539 if (!isalnum((int)*ptr) && !isspace((int)*ptr))
543 * Open the printer device...
546 if ((fnum = cli_open(cli, title, O_RDWR | O_CREAT | O_TRUNC, DENY_NONE)) == -1)
548 fprintf(stderr, "ERROR: %s opening remote spool %s\n",
549 cli_errstr(cli), title);
554 * Copy the file to the printer...
562 while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
564 if (cli_write(cli, fnum, 0, buffer, tbytes, nbytes) != nbytes)
566 fprintf(stderr, "ERROR: Error writing spool: %s\n", cli_errstr(cli));
573 if (!cli_close(cli, fnum))
575 fprintf(stderr, "ERROR: %s closing remote spool %s\n",
576 cli_errstr(cli), title);