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 */
74 /* we expect the URI in argv[0]. Detect the case where it is in argv[1] and cope */
75 if (argc
> 2 && strncmp(argv
[0],"smb://", 6) && !strncmp(argv
[1],"smb://", 6)) {
83 * NEW! In CUPS 1.1 the backends are run with no arguments to list the
84 * available devices. These can be devices served by this backend
85 * or any other backends (i.e. you can have an SNMP backend that
86 * is only used to enumerate the available network printers... :)
93 if (argc
< 6 || argc
> 7)
95 fprintf(stderr
, "Usage: %s [DEVICE_URI] job-id user title copies options [file]\n",
97 fputs(" The DEVICE_URI environment variable can also contain the\n", stderr
);
98 fputs(" destination printer:\n", stderr
);
100 fputs(" smb://[username:password@][workgroup/]server[:port]/printer\n", stderr
);
105 * If we have 7 arguments, print the file named on the command-line.
106 * Otherwise, print data from stdin...
113 * Print from Copy stdin to a temporary file...
119 else if ((fp
= fopen(argv
[6], "rb")) == NULL
)
121 perror("ERROR: Unable to open print file");
125 copies
= atoi(argv
[4]);
131 if (getenv("DEVICE_URI") != NULL
)
132 strncpy(uri
, getenv("DEVICE_URI"), sizeof(uri
) - 1);
133 else if (strncmp(argv
[0], "smb://", 6) == 0)
134 strncpy(uri
, argv
[0], sizeof(uri
) - 1);
137 fputs("ERROR: No device URI found in DEVICE_URI environment variable or argv[0] !\n", stderr
);
141 uri
[sizeof(uri
) - 1] = '\0';
144 * Extract the destination from the URI...
147 if ((sep
= strrchr_m(uri
, '@')) != NULL
)
155 * Extract password as needed...
158 if ((password
= strchr_m(username
, ':')) != NULL
)
170 if ((sep
= strchr_m(server
, '/')) == NULL
)
172 fputs("ERROR: Bad URI - need printer name!\n", stderr
);
179 if ((sep
= strchr_m(printer
, '/')) != NULL
)
182 * Convert to smb://[username:password@]workgroup/server/printer...
194 if ((sep
= strrchr_m(server
, ':')) != NULL
)
205 * Setup the SAMBA server state...
208 setup_logging("smbspool", True
);
210 in_client
= True
; /* Make sure that we tell lp_load we are */
212 if (!lp_load(dyn_CONFIGFILE
, True
, False
, False
))
214 fprintf(stderr
, "ERROR: Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE
);
218 if (workgroup
== NULL
)
219 workgroup
= lp_workgroup();
225 if ((cli
= smb_connect(workgroup
, server
, port
, printer
, username
, password
, argv
[2])) == NULL
)
227 if (getenv("CLASS") == NULL
)
229 fprintf(stderr
, "ERROR: Unable to connect to CIFS host, will retry in 60 seconds...");
230 sleep (60); /* should just waiting and retrying fix authentication ??? */
234 fprintf(stderr
, "ERROR: Unable to connect to CIFS host, trying next printer...");
242 * Now that we are connected to the server, ignore SIGTERM so that we
243 * can finish out any page data the driver sends (e.g. to eject the
244 * current page... Only ignore SIGTERM if we are printing data from
245 * stdin (otherwise you can't cancel raw jobs...)
249 CatchSignal(SIGTERM
, SIG_IGN
);
255 for (i
= 0; i
< copies
; i
++)
256 if ((status
= smb_print(cli
, argv
[3] /* title */, fp
)) != 0)
262 * Return the queue status...
270 * 'list_devices()' - List the available printers seen on the network...
277 * Eventually, search the local workgroup for available hosts and printers.
280 puts("network smb \"Unknown\" \"Windows Printer via SAMBA\"");
285 * get the name of the newest ticket cache for the uid user.
286 * pam_krb5 defines a non default ticket cache for each user
289 char * get_ticket_cache( uid_t uid
)
291 SMB_STRUCT_DIR
*tcdir
; /* directory where ticket caches are stored */
292 SMB_STRUCT_DIRENT
*dirent
; /* directory entry */
293 char *filename
= NULL
; /* holds file names on the tmp directory */
295 char user_cache_prefix
[CC_MAX_FILE_LEN
];
296 char file_path
[CC_MAX_FILE_PATH_LEN
];
297 char *ticket_file
= NULL
;
300 snprintf(user_cache_prefix
, CC_MAX_FILE_LEN
, "%s%d", CC_PREFIX
, uid
);
301 tcdir
= sys_opendir( TICKET_CC_DIR
);
305 while ( (dirent
= sys_readdir( tcdir
) ) )
307 filename
= dirent
->d_name
;
308 snprintf(file_path
, CC_MAX_FILE_PATH_LEN
,"%s/%s", TICKET_CC_DIR
, filename
);
309 if (sys_stat(file_path
, &buf
) == 0 )
311 if ( ( buf
.st_uid
== uid
) && ( S_ISREG(buf
.st_mode
) ) )
314 * check the user id of the file to prevent denial of
315 * service attacks by creating fake ticket caches for the
318 if ( strstr( filename
, user_cache_prefix
) )
320 if ( buf
.st_mtime
> t
)
323 * a newer ticket cache found
326 ticket_file
=SMB_STRDUP(file_path
);
336 if ( ticket_file
== NULL
)
339 /* no ticket cache found */
340 fprintf(stderr
, "ERROR: No ticket cache found for userid=%d\n", uid
);
348 static struct cli_state
349 *smb_complete_connection(const char *myname
,
352 const char *username
,
353 const char *password
,
354 const char *workgroup
,
358 struct cli_state
*cli
; /* New connection */
361 /* Start the SMB connection */
362 nt_status
= cli_start_connection( &cli
, myname
, server
, NULL
, port
,
363 Undefined
, flags
, NULL
);
364 if (!NT_STATUS_IS_OK(nt_status
))
370 if ( (username
) && (*username
) &&
371 ((!password
) || ((password
) && (strlen(password
) == 0 ))) &&
372 (cli
->use_kerberos
) )
374 /* Use kerberos authentication */
379 if ( !(pw
= sys_getpwnam(username
)) ) {
380 fprintf(stderr
,"ERROR Can not get %s uid\n", username
);
386 * Get the ticket cache of the user to set KRB5CCNAME env
389 cache_file
= get_ticket_cache( pw
->pw_uid
);
390 if ( cache_file
== NULL
)
392 fprintf(stderr
, "ERROR: Can not get the ticket cache for %s\n", username
);
397 if ( setenv(KRB5CCNAME
, cache_file
, OVERWRITE
) < 0 )
399 fprintf(stderr
, "ERROR: Can not add KRB5CCNAME to the environment");
407 * Change the UID of the process to be able to read the kerberos
415 if (!cli_session_setup(cli
, username
, password
, strlen(password
)+1,
416 password
, strlen(password
)+1,
419 fprintf(stderr
,"ERROR: Session setup failed: %s\n", cli_errstr(cli
));
420 if (NT_STATUS_V(cli_nt_error(cli
)) ==
421 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED
))
423 fprintf(stderr
, "did you forget to run kinit?\n");
430 if (!cli_send_tconX(cli
, share
, "?????", password
, strlen(password
)+1))
432 fprintf(stderr
, "ERROR: Tree connect failed (%s)\n", cli_errstr(cli
));
441 * 'smb_connect()' - Return a connection to a server.
444 static struct cli_state
* /* O - SMB connection */
445 smb_connect(const char *workgroup
, /* I - Workgroup */
446 const char *server
, /* I - Server */
447 const int port
, /* I - Port */
448 const char *share
, /* I - Printer */
449 const char *username
, /* I - Username */
450 const char *password
, /* I - Password */
451 const char *jobusername
) /* I - User who issued the print job */
453 struct cli_state
*cli
; /* New connection */
454 pstring myname
; /* Client name */
457 * Get the names and addresses of the client and server...
462 /* See if we have a username first. This is for backwards compatible
463 behavior with 3.0.14a */
465 if ( username
&& *username
)
467 cli
= smb_complete_connection(myname
, server
, port
, username
,
468 password
, workgroup
, share
, 0 );
474 * Try to use the user kerberos credentials (if any) to authenticate
476 cli
= smb_complete_connection(myname
, server
, port
, jobusername
, "",
478 CLI_FULL_CONNECTION_USE_KERBEROS
);
480 if (cli
) { return cli
; }
483 * last try. Use anonymous authentication
485 cli
= smb_complete_connection(myname
, server
, port
, "", "",
486 workgroup
, share
, 0);
489 * Return the new connection...
497 * 'smb_print()' - Queue a job for printing using the SMB protocol.
500 static int /* O - 0 = success, non-0 = failure */
501 smb_print(struct cli_state
*cli
, /* I - SMB connection */
502 char *title
, /* I - Title/job name */
503 FILE *fp
) /* I - File to print */
505 int fnum
; /* File number */
506 int nbytes
, /* Number of bytes read */
507 tbytes
; /* Total bytes read */
508 char buffer
[8192], /* Buffer for copy */
509 *ptr
; /* Pointer into tile */
513 * Sanitize the title...
516 for (ptr
= title
; *ptr
; ptr
++)
517 if (!isalnum((int)*ptr
) && !isspace((int)*ptr
))
521 * Open the printer device...
524 if ((fnum
= cli_open(cli
, title
, O_RDWR
| O_CREAT
| O_TRUNC
, DENY_NONE
)) == -1)
526 fprintf(stderr
, "ERROR: %s opening remote spool %s\n",
527 cli_errstr(cli
), title
);
532 * Copy the file to the printer...
540 while ((nbytes
= fread(buffer
, 1, sizeof(buffer
), fp
)) > 0)
542 if (cli_write(cli
, fnum
, 0, buffer
, tbytes
, nbytes
) != nbytes
)
544 fprintf(stderr
, "ERROR: Error writing spool: %s\n", cli_errstr(cli
));
551 if (!cli_close(cli
, fnum
))
553 fprintf(stderr
, "ERROR: %s closing remote spool %s\n",
554 cli_errstr(cli
), title
);