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"
39 extern BOOL in_client; /* Boolean for client library */
46 static void list_devices(void);
47 static struct cli_state *smb_complete_connection(const char *, const char *,int , const char *, const char *, const char *, const char *, int);
48 static struct cli_state *smb_connect(const char *, const char *, int, const char *, const char *, const char *, const char *);
49 static int smb_print(struct cli_state *, char *, FILE *);
53 * 'main()' - Main entry for SMB backend.
56 int /* O - Exit status */
57 main(int argc, /* I - Number of command-line arguments */
58 char *argv[]) /* I - Command-line arguments */
60 int i; /* Looping var */
61 int copies; /* Number of copies */
62 int port; /* Port number */
63 char uri[1024], /* URI */
64 *sep, /* Pointer to separator */
65 *password; /* Password */
66 const char *username, /* Username */
67 *server, /* Server name */
68 *printer; /* Printer name */
69 const char *workgroup; /* Workgroup */
70 FILE *fp; /* File to print */
71 int status=0; /* Status of LPD job */
72 struct cli_state *cli; /* SMB interface */
77 /* we expect the URI in argv[0]. Detect the case where it is in argv[1] and cope */
78 if (argc > 2 && strncmp(argv[0],"smb://", 6) && !strncmp(argv[1],"smb://", 6)) {
86 * NEW! In CUPS 1.1 the backends are run with no arguments to list the
87 * available devices. These can be devices served by this backend
88 * or any other backends (i.e. you can have an SNMP backend that
89 * is only used to enumerate the available network printers... :)
96 if (argc < 6 || argc > 7)
98 fprintf(stderr, "Usage: %s [DEVICE_URI] job-id user title copies options [file]\n",
100 fputs(" The DEVICE_URI environment variable can also contain the\n", stderr);
101 fputs(" destination printer:\n", stderr);
103 fputs(" smb://[username:password@][workgroup/]server[:port]/printer\n", stderr);
108 * If we have 7 arguments, print the file named on the command-line.
109 * Otherwise, print data from stdin...
116 * Print from Copy stdin to a temporary file...
122 else if ((fp = fopen(argv[6], "rb")) == NULL)
124 perror("ERROR: Unable to open print file");
128 copies = atoi(argv[4]);
134 if (getenv("DEVICE_URI") != NULL)
135 strncpy(uri, getenv("DEVICE_URI"), sizeof(uri) - 1);
136 else if (strncmp(argv[0], "smb://", 6) == 0)
137 strncpy(uri, argv[0], sizeof(uri) - 1);
140 fputs("ERROR: No device URI found in DEVICE_URI environment variable or argv[0] !\n", stderr);
144 uri[sizeof(uri) - 1] = '\0';
147 * Extract the destination from the URI...
150 if ((sep = strrchr_m(uri, '@')) != NULL)
158 * Extract password as needed...
161 if ((password = strchr_m(username, ':')) != NULL)
173 if ((sep = strchr_m(server, '/')) == NULL)
175 fputs("ERROR: Bad URI - need printer name!\n", stderr);
182 if ((sep = strchr_m(printer, '/')) != NULL)
185 * Convert to smb://[username:password@]workgroup/server/printer...
197 if ((sep = strrchr_m(server, ':')) != NULL)
208 * Setup the SAMBA server state...
211 setup_logging("smbspool", True);
213 in_client = True; /* Make sure that we tell lp_load we are */
215 if (!lp_load(dyn_CONFIGFILE, True, False, False))
217 fprintf(stderr, "ERROR: Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE);
221 if (workgroup == NULL)
222 workgroup = lp_workgroup();
228 if ((cli = smb_connect(workgroup, server, port, printer, username, password, argv[2])) == NULL)
230 if (getenv("CLASS") == NULL)
232 fprintf(stderr, "ERROR: Unable to connect to CIFS host, will retry in 60 seconds...");
233 sleep (60); /* should just waiting and retrying fix authentication ??? */
237 fprintf(stderr, "ERROR: Unable to connect to CIFS host, trying next printer...");
245 * Now that we are connected to the server, ignore SIGTERM so that we
246 * can finish out any page data the driver sends (e.g. to eject the
247 * current page... Only ignore SIGTERM if we are printing data from
248 * stdin (otherwise you can't cancel raw jobs...)
252 CatchSignal(SIGTERM, SIG_IGN);
258 for (i = 0; i < copies; i ++)
259 if ((status = smb_print(cli, argv[3] /* title */, fp)) != 0)
265 * Return the queue status...
273 * 'list_devices()' - List the available printers seen on the network...
280 * Eventually, search the local workgroup for available hosts and printers.
283 puts("network smb \"Unknown\" \"Windows Printer via SAMBA\"");
288 * get the name of the newest ticket cache for the uid user.
289 * pam_krb5 defines a non default ticket cache for each user
292 char * get_ticket_cache( uid_t uid )
294 SMB_STRUCT_DIR *tcdir; /* directory where ticket caches are stored */
295 SMB_STRUCT_DIRENT *dirent; /* directory entry */
296 char *filename = NULL; /* holds file names on the tmp directory */
298 char user_cache_prefix[CC_MAX_FILE_LEN];
299 char file_path[CC_MAX_FILE_PATH_LEN];
300 char *ticket_file = NULL;
303 snprintf(user_cache_prefix, CC_MAX_FILE_LEN, "%s%d", CC_PREFIX, uid );
304 tcdir = sys_opendir( TICKET_CC_DIR );
308 while ( (dirent = sys_readdir( tcdir ) ) )
310 filename = dirent->d_name;
311 snprintf(file_path, CC_MAX_FILE_PATH_LEN,"%s/%s", TICKET_CC_DIR, filename);
312 if (sys_stat(file_path, &buf) == 0 )
314 if ( ( buf.st_uid == uid ) && ( S_ISREG(buf.st_mode) ) )
317 * check the user id of the file to prevent denial of
318 * service attacks by creating fake ticket caches for the
321 if ( strstr( filename, user_cache_prefix ) )
323 if ( buf.st_mtime > t )
326 * a newer ticket cache found
329 ticket_file=SMB_STRDUP(file_path);
339 if ( ticket_file == NULL )
341 /* no ticket cache found */
342 fprintf(stderr, "ERROR: No ticket cache found for userid=%d\n", uid);
349 static struct cli_state
350 *smb_complete_connection(const char *myname,
353 const char *username,
354 const char *password,
355 const char *workgroup,
359 struct cli_state *cli; /* New connection */
362 /* Start the SMB connection */
363 nt_status = cli_start_connection( &cli, myname, server, NULL, port,
364 Undefined, flags, NULL);
365 if (!NT_STATUS_IS_OK(nt_status))
371 if ( (username) && (*username) &&
372 ((!password) || ((password) && (strlen(password) == 0 ))) &&
373 (cli->use_kerberos) )
375 /* Use kerberos authentication */
380 if ( !(pw = sys_getpwnam(username)) ) {
381 fprintf(stderr,"ERROR Can not get %s uid\n", username);
387 * Get the ticket cache of the user to set KRB5CCNAME env
390 cache_file = get_ticket_cache( pw->pw_uid );
391 if ( cache_file == NULL )
393 fprintf(stderr, "ERROR: Can not get the ticket cache for %s\n", username);
398 if ( setenv(KRB5CCNAME, cache_file, OVERWRITE) < 0 )
400 fprintf(stderr, "ERROR: Can not add KRB5CCNAME to the environment");
408 * Change the UID of the process to be able to read the kerberos
416 if (!cli_session_setup(cli, username, password, strlen(password)+1,
417 password, strlen(password)+1,
420 fprintf(stderr,"ERROR: Session setup failed: %s\n", cli_errstr(cli));
421 if (NT_STATUS_V(cli_nt_error(cli)) ==
422 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
424 fprintf(stderr, "did you forget to run kinit?\n");
431 if (!cli_send_tconX(cli, share, "?????", password, strlen(password)+1))
433 fprintf(stderr, "ERROR: Tree connect failed (%s)\n", cli_errstr(cli));
442 * 'smb_connect()' - Return a connection to a server.
445 static struct cli_state * /* O - SMB connection */
446 smb_connect(const char *workgroup, /* I - Workgroup */
447 const char *server, /* I - Server */
448 const int port, /* I - Port */
449 const char *share, /* I - Printer */
450 const char *username, /* I - Username */
451 const char *password, /* I - Password */
452 const char *jobusername) /* I - User who issued the print job */
454 struct cli_state *cli; /* New connection */
455 pstring myname; /* Client name */
458 * Get the names and addresses of the client and server...
463 /* See if we have a username first. This is for backwards compatible
464 behavior with 3.0.14a */
466 if ( username && *username )
468 cli = smb_complete_connection(myname, server, port, username,
469 password, workgroup, share, 0 );
475 * Try to use the user kerberos credentials (if any) to authenticate
477 cli = smb_complete_connection(myname, server, port, jobusername, "",
479 CLI_FULL_CONNECTION_USE_KERBEROS );
481 if (cli ) { return cli; }
484 * last try. Use anonymous authentication
486 cli = smb_complete_connection(myname, server, port, "", "",
487 workgroup, share, 0);
490 * Return the new connection...
498 * 'smb_print()' - Queue a job for printing using the SMB protocol.
501 static int /* O - 0 = success, non-0 = failure */
502 smb_print(struct cli_state *cli, /* I - SMB connection */
503 char *title, /* I - Title/job name */
504 FILE *fp) /* I - File to print */
506 int fnum; /* File number */
507 int nbytes, /* Number of bytes read */
508 tbytes; /* Total bytes read */
509 char buffer[8192], /* Buffer for copy */
510 *ptr; /* Pointer into tile */
514 * Sanitize the title...
517 for (ptr = title; *ptr; ptr ++)
518 if (!isalnum((int)*ptr) && !isspace((int)*ptr))
522 * Open the printer device...
525 if ((fnum = cli_open(cli, title, O_RDWR | O_CREAT | O_TRUNC, DENY_NONE)) == -1)
527 fprintf(stderr, "ERROR: %s opening remote spool %s\n",
528 cli_errstr(cli), title);
533 * Copy the file to the printer...
541 while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
543 if (cli_write(cli, fnum, 0, buffer, tbytes, nbytes) != nbytes)
545 fprintf(stderr, "ERROR: Error writing spool: %s\n", cli_errstr(cli));
552 if (!cli_close(cli, fnum))
554 fprintf(stderr, "ERROR: %s closing remote spool %s\n",
555 cli_errstr(cli), title);