]>
Commit | Line | Data |
---|---|---|
ef416fc2 | 1 | /* |
b19ccc9e | 2 | * "$Id: cups-deviced.c 7816 2008-07-30 20:53:31Z mike $" |
ef416fc2 | 3 | * |
4 | * Device scanning mini-daemon for the Common UNIX Printing System (CUPS). | |
5 | * | |
91c84a35 | 6 | * Copyright 2007-2008 by Apple Inc. |
bd7854cb | 7 | * Copyright 1997-2006 by Easy Software Products. |
ef416fc2 | 8 | * |
9 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 10 | * property of Apple Inc. and are protected by Federal copyright |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 14 | * |
15 | * Contents: | |
16 | * | |
ae71f5de MS |
17 | * main() - Scan for devices and return an IPP response. |
18 | * add_device() - Add a new device to the list. | |
19 | * compare_devices() - Compare device names to eliminate duplicates. | |
20 | * create_strings_array() - Create a CUPS array of strings. | |
21 | * get_current_time() - Get the current time as a double value in seconds. | |
22 | * get_device() - Get a device from a backend. | |
23 | * process_children() - Process all dead children... | |
24 | * sigchld_handler() - Handle 'child' signals from old processes. | |
25 | * start_backend() - Run a backend to gather the available devices. | |
ef416fc2 | 26 | */ |
27 | ||
28 | /* | |
29 | * Include necessary headers... | |
30 | */ | |
31 | ||
32 | #include "util.h" | |
33 | #include <cups/array.h> | |
34 | #include <cups/dir.h> | |
cc0d019f | 35 | #include <fcntl.h> |
ae71f5de MS |
36 | #include <sys/wait.h> |
37 | #include <poll.h> | |
38 | ||
39 | ||
40 | /* | |
41 | * Constants... | |
42 | */ | |
43 | ||
44 | #define MAX_BACKENDS 200 /* Maximum number of backends we'll run */ | |
45 | ||
46 | ||
47 | /* | |
48 | * Backend information... | |
49 | */ | |
50 | ||
51 | typedef struct | |
52 | { | |
53 | char *name; /* Name of backend */ | |
54 | int pid, /* Process ID */ | |
55 | status; /* Exit status */ | |
56 | cups_file_t *pipe; /* Pipe from backend stdout */ | |
57 | int count; /* Number of devices found */ | |
58 | } cupsd_backend_t; | |
b423cd4c | 59 | |
ef416fc2 | 60 | |
61 | /* | |
62 | * Device information structure... | |
63 | */ | |
64 | ||
65 | typedef struct | |
66 | { | |
67 | char device_class[128], /* Device class */ | |
ef416fc2 | 68 | device_info[128], /* Device info/description */ |
749b1e90 | 69 | device_uri[1024]; /* Device URI */ |
ae71f5de | 70 | } cupsd_device_t; |
ef416fc2 | 71 | |
72 | ||
73 | /* | |
74 | * Local globals... | |
75 | */ | |
76 | ||
ae71f5de MS |
77 | static int num_backends = 0, |
78 | /* Total backends */ | |
79 | active_backends = 0; | |
80 | /* Active backends */ | |
81 | static cupsd_backend_t backends[MAX_BACKENDS]; | |
82 | /* Array of backends */ | |
83 | static struct pollfd backend_fds[MAX_BACKENDS]; | |
84 | /* Array for poll() */ | |
85 | static cups_array_t *devices; /* Array of devices */ | |
e00b005a | 86 | static int normal_user; /* Normal user ID */ |
ae71f5de MS |
87 | static int device_limit; /* Maximum number of devices */ |
88 | static int send_class, /* Send device-class attribute? */ | |
89 | send_info, /* Send device-info attribute? */ | |
90 | send_make_and_model, | |
91 | /* Send device-make-and-model attribute? */ | |
92 | send_uri, /* Send device-uri attribute? */ | |
749b1e90 MS |
93 | send_id, /* Send device-id attribute? */ |
94 | send_location; /* Send device-location attribute? */ | |
ae71f5de MS |
95 | static int dead_children = 0; |
96 | /* Dead children? */ | |
ef416fc2 | 97 | |
98 | ||
99 | /* | |
100 | * Local functions... | |
101 | */ | |
102 | ||
ae71f5de MS |
103 | static int add_device(const char *device_class, |
104 | const char *device_make_and_model, | |
105 | const char *device_info, | |
106 | const char *device_uri, | |
749b1e90 MS |
107 | const char *device_id, |
108 | const char *device_location); | |
ae71f5de MS |
109 | static int compare_devices(cupsd_device_t *p0, |
110 | cupsd_device_t *p1); | |
111 | static cups_array_t *create_strings_array(const char *s); | |
112 | static double get_current_time(void); | |
113 | static int get_device(cupsd_backend_t *backend); | |
114 | static void process_children(void); | |
115 | static void sigchld_handler(int sig); | |
116 | static int start_backend(const char *backend, int root); | |
ef416fc2 | 117 | |
118 | ||
119 | /* | |
120 | * 'main()' - Scan for devices and return an IPP response. | |
121 | * | |
122 | * Usage: | |
123 | * | |
124 | * cups-deviced request_id limit options | |
125 | */ | |
126 | ||
127 | int /* O - Exit code */ | |
128 | main(int argc, /* I - Number of command-line args */ | |
129 | char *argv[]) /* I - Command-line arguments */ | |
130 | { | |
ae71f5de | 131 | int i; /* Looping var */ |
e00b005a | 132 | int request_id; /* Request ID */ |
ae71f5de MS |
133 | int timeout; /* Timeout in seconds */ |
134 | const char *server_bin; /* CUPS_SERVERBIN environment variable */ | |
135 | char filename[1024]; /* Backend directory filename */ | |
ef416fc2 | 136 | cups_dir_t *dir; /* Directory pointer */ |
137 | cups_dentry_t *dent; /* Directory entry */ | |
ae71f5de MS |
138 | double current_time, /* Current time */ |
139 | end_time; /* Ending time */ | |
ef416fc2 | 140 | int num_options; /* Number of options */ |
141 | cups_option_t *options; /* Options */ | |
ae71f5de MS |
142 | cups_array_t *requested, /* requested-attributes values */ |
143 | *exclude; /* exclude-schemes values */ | |
ef416fc2 | 144 | #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET) |
145 | struct sigaction action; /* Actions for POSIX signals */ | |
146 | #endif /* HAVE_SIGACTION && !HAVE_SIGSET */ | |
147 | ||
148 | ||
e00b005a | 149 | setbuf(stderr, NULL); |
150 | ||
ef416fc2 | 151 | /* |
152 | * Check the command-line... | |
153 | */ | |
154 | ||
ae71f5de | 155 | if (argc != 6) |
e00b005a | 156 | { |
ae71f5de | 157 | fputs("Usage: cups-deviced request-id limit timeout user-id options\n", stderr); |
e00b005a | 158 | |
e00b005a | 159 | return (1); |
160 | } | |
161 | ||
ae71f5de | 162 | request_id = atoi(argv[1]); |
e00b005a | 163 | if (request_id < 1) |
ef416fc2 | 164 | { |
ae71f5de | 165 | fprintf(stderr, "ERROR: [cups-deviced] Bad request ID %d!\n", request_id); |
e00b005a | 166 | |
ef416fc2 | 167 | return (1); |
168 | } | |
169 | ||
ae71f5de MS |
170 | device_limit = atoi(argv[2]); |
171 | if (device_limit < 0) | |
e00b005a | 172 | { |
ae71f5de | 173 | fprintf(stderr, "ERROR: [cups-deviced] Bad limit %d!\n", device_limit); |
e00b005a | 174 | |
e00b005a | 175 | return (1); |
176 | } | |
177 | ||
ae71f5de MS |
178 | timeout = atoi(argv[3]); |
179 | if (timeout < 1) | |
180 | { | |
181 | fprintf(stderr, "ERROR: [cups-deviced] Bad timeout %d!\n", timeout); | |
182 | ||
183 | return (1); | |
184 | } | |
ef416fc2 | 185 | |
ae71f5de MS |
186 | normal_user = atoi(argv[4]); |
187 | if (normal_user <= 0) | |
ef416fc2 | 188 | { |
ae71f5de MS |
189 | fprintf(stderr, "ERROR: [cups-deviced] Bad user %d!\n", normal_user); |
190 | ||
191 | return (1); | |
ef416fc2 | 192 | } |
ae71f5de MS |
193 | |
194 | num_options = cupsParseOptions(argv[5], 0, &options); | |
195 | requested = create_strings_array(cupsGetOption("requested-attributes", | |
196 | num_options, options)); | |
197 | exclude = create_strings_array(cupsGetOption("exclude-schemes", | |
198 | num_options, options)); | |
199 | ||
200 | if (!requested || cupsArrayFind(requested, "all") != NULL) | |
749b1e90 MS |
201 | { |
202 | send_class = send_info = send_make_and_model = send_uri = send_id = | |
203 | send_location = 1; | |
204 | } | |
ef416fc2 | 205 | else |
206 | { | |
ae71f5de MS |
207 | send_class = cupsArrayFind(requested, "device-class") != NULL; |
208 | send_info = cupsArrayFind(requested, "device-info") != NULL; | |
209 | send_make_and_model = cupsArrayFind(requested, "device-make-and-model") != NULL; | |
210 | send_uri = cupsArrayFind(requested, "device-uri") != NULL; | |
211 | send_id = cupsArrayFind(requested, "device-id") != NULL; | |
749b1e90 | 212 | send_location = cupsArrayFind(requested, "device-location") != NULL; |
ef416fc2 | 213 | } |
214 | ||
ae71f5de MS |
215 | /* |
216 | * Listen to child signals... | |
217 | */ | |
218 | ||
219 | #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */ | |
220 | sigset(SIGCHLD, sigchld_handler); | |
221 | #elif defined(HAVE_SIGACTION) | |
222 | memset(&action, 0, sizeof(action)); | |
223 | ||
224 | sigemptyset(&action.sa_mask); | |
225 | sigaddset(&action.sa_mask, SIGCHLD); | |
226 | action.sa_handler = sigchld_handler; | |
227 | sigaction(SIGCHLD, &action, NULL); | |
228 | #else | |
229 | signal(SIGCLD, sigchld_handler); /* No, SIGCLD isn't a typo... */ | |
230 | #endif /* HAVE_SIGSET */ | |
231 | ||
ef416fc2 | 232 | /* |
233 | * Try opening the backend directory... | |
234 | */ | |
235 | ||
236 | if ((server_bin = getenv("CUPS_SERVERBIN")) == NULL) | |
237 | server_bin = CUPS_SERVERBIN; | |
238 | ||
ae71f5de | 239 | snprintf(filename, sizeof(filename), "%s/backend", server_bin); |
ef416fc2 | 240 | |
ae71f5de | 241 | if ((dir = cupsDirOpen(filename)) == NULL) |
ef416fc2 | 242 | { |
e00b005a | 243 | fprintf(stderr, "ERROR: [cups-deviced] Unable to open backend directory " |
ae71f5de | 244 | "\"%s\": %s", filename, strerror(errno)); |
e00b005a | 245 | |
ef416fc2 | 246 | return (1); |
247 | } | |
248 | ||
249 | /* | |
250 | * Setup the devices array... | |
251 | */ | |
252 | ||
ae71f5de | 253 | devices = cupsArrayNew((cups_array_func_t)compare_devices, NULL); |
ef416fc2 | 254 | |
255 | /* | |
256 | * Loop through all of the device backends... | |
257 | */ | |
258 | ||
259 | while ((dent = cupsDirRead(dir)) != NULL) | |
260 | { | |
e00b005a | 261 | /* |
262 | * Skip entries that are not executable files... | |
263 | */ | |
264 | ||
265 | if (!S_ISREG(dent->fileinfo.st_mode) || | |
ae71f5de | 266 | !isalnum(dent->filename[0] & 255) || |
e00b005a | 267 | (dent->fileinfo.st_mode & (S_IRUSR | S_IXUSR)) != (S_IRUSR | S_IXUSR)) |
268 | continue; | |
269 | ||
ae71f5de MS |
270 | if (cupsArrayFind(exclude, dent->filename)) |
271 | continue; | |
e00b005a | 272 | |
cc0d019f MS |
273 | /* |
274 | * Backends without permissions for normal users run as root, | |
275 | * all others run as the unprivileged user... | |
276 | */ | |
277 | ||
ae71f5de MS |
278 | start_backend(dent->filename, |
279 | !(dent->fileinfo.st_mode & (S_IRWXG | S_IRWXO))); | |
ef416fc2 | 280 | } |
281 | ||
282 | cupsDirClose(dir); | |
283 | ||
284 | /* | |
ae71f5de | 285 | * Collect devices... |
ef416fc2 | 286 | */ |
287 | ||
ae71f5de MS |
288 | if (getenv("SOFTWARE")) |
289 | puts("Content-Type: application/ipp\n"); | |
ef416fc2 | 290 | |
e00b005a | 291 | cupsdSendIPPHeader(IPP_OK, request_id); |
ef416fc2 | 292 | cupsdSendIPPGroup(IPP_TAG_OPERATION); |
293 | cupsdSendIPPString(IPP_TAG_CHARSET, "attributes-charset", "utf-8"); | |
294 | cupsdSendIPPString(IPP_TAG_LANGUAGE, "attributes-natural-language", "en-US"); | |
295 | ||
ae71f5de | 296 | end_time = get_current_time() + timeout; |
ef416fc2 | 297 | |
ae71f5de | 298 | while (active_backends > 0 && (current_time = get_current_time()) < end_time) |
ef416fc2 | 299 | { |
300 | /* | |
ae71f5de MS |
301 | * Collect the output from the backends... |
302 | */ | |
303 | ||
304 | timeout = (int)(1000 * (end_time - current_time)); | |
305 | ||
306 | if (poll(backend_fds, num_backends, timeout) > 0) | |
307 | { | |
308 | for (i = 0; i < num_backends; i ++) | |
309 | if (backend_fds[i].revents && backends[i].pipe) | |
310 | if (get_device(backends + i)) | |
311 | { | |
312 | backend_fds[i].fd = 0; | |
313 | backend_fds[i].events = 0; | |
314 | } | |
315 | } | |
316 | ||
317 | /* | |
318 | * Get exit status from children... | |
ef416fc2 | 319 | */ |
320 | ||
ae71f5de MS |
321 | if (dead_children) |
322 | process_children(); | |
ef416fc2 | 323 | } |
324 | ||
325 | cupsdSendIPPTrailer(); | |
326 | ||
327 | /* | |
ae71f5de | 328 | * Terminate any remaining backends and exit... |
ef416fc2 | 329 | */ |
330 | ||
ae71f5de MS |
331 | if (active_backends > 0) |
332 | { | |
333 | for (i = 0; i < num_backends; i ++) | |
334 | if (backends[i].pid) | |
335 | kill(backends[i].pid, SIGTERM); | |
336 | } | |
ef416fc2 | 337 | |
338 | return (0); | |
339 | } | |
340 | ||
341 | ||
342 | /* | |
ae71f5de | 343 | * 'add_device()' - Add a new device to the list. |
ef416fc2 | 344 | */ |
345 | ||
ae71f5de MS |
346 | static int /* O - 0 on success, -1 on error */ |
347 | add_device( | |
ef416fc2 | 348 | const char *device_class, /* I - Device class */ |
349 | const char *device_make_and_model, /* I - Device make and model */ | |
350 | const char *device_info, /* I - Device information */ | |
351 | const char *device_uri, /* I - Device URI */ | |
749b1e90 MS |
352 | const char *device_id, /* I - 1284 device ID */ |
353 | const char *device_location) /* I - Physical location */ | |
ef416fc2 | 354 | { |
1f0275e3 | 355 | cupsd_device_t *device; /* New device */ |
ef416fc2 | 356 | |
357 | ||
358 | /* | |
359 | * Allocate memory for the device record... | |
360 | */ | |
361 | ||
ae71f5de | 362 | if ((device = calloc(1, sizeof(cupsd_device_t))) == NULL) |
ef416fc2 | 363 | { |
364 | fputs("ERROR: [cups-deviced] Ran out of memory allocating a device!\n", | |
365 | stderr); | |
ae71f5de | 366 | return (-1); |
ef416fc2 | 367 | } |
368 | ||
369 | /* | |
370 | * Copy the strings over... | |
371 | */ | |
372 | ||
ae71f5de | 373 | strlcpy(device->device_class, device_class, sizeof(device->device_class)); |
ae71f5de MS |
374 | strlcpy(device->device_info, device_info, sizeof(device->device_info)); |
375 | strlcpy(device->device_uri, device_uri, sizeof(device->device_uri)); | |
ef416fc2 | 376 | |
377 | /* | |
378 | * Add the device to the array and return... | |
379 | */ | |
380 | ||
1f0275e3 | 381 | if (cupsArrayFind(devices, device)) |
2e4ff8af MS |
382 | { |
383 | /* | |
384 | * Avoid duplicates! | |
385 | */ | |
ef416fc2 | 386 | |
ae71f5de | 387 | free(device); |
2e4ff8af MS |
388 | } |
389 | else | |
ae71f5de MS |
390 | { |
391 | cupsArrayAdd(devices, device); | |
392 | ||
393 | if (device_limit <= 0 || cupsArrayCount(devices) < device_limit) | |
394 | { | |
395 | /* | |
396 | * Send device info... | |
397 | */ | |
398 | ||
399 | cupsdSendIPPGroup(IPP_TAG_PRINTER); | |
400 | if (send_class) | |
401 | cupsdSendIPPString(IPP_TAG_KEYWORD, "device-class", | |
749b1e90 | 402 | device_class); |
ae71f5de | 403 | if (send_info) |
749b1e90 | 404 | cupsdSendIPPString(IPP_TAG_TEXT, "device-info", device_info); |
ae71f5de MS |
405 | if (send_make_and_model) |
406 | cupsdSendIPPString(IPP_TAG_TEXT, "device-make-and-model", | |
749b1e90 | 407 | device_make_and_model); |
ae71f5de | 408 | if (send_uri) |
749b1e90 | 409 | cupsdSendIPPString(IPP_TAG_URI, "device-uri", device_uri); |
ae71f5de | 410 | if (send_id) |
749b1e90 MS |
411 | cupsdSendIPPString(IPP_TAG_TEXT, "device-id", |
412 | device_id ? device_id : ""); | |
413 | if (send_location) | |
414 | cupsdSendIPPString(IPP_TAG_TEXT, "device-location", | |
415 | device_location ? device_location : ""); | |
ae71f5de MS |
416 | |
417 | fflush(stdout); | |
418 | fputs("DEBUG: Flushed attributes...\n", stderr); | |
419 | } | |
420 | } | |
421 | ||
422 | return (0); | |
ef416fc2 | 423 | } |
424 | ||
425 | ||
426 | /* | |
ae71f5de | 427 | * 'compare_devices()' - Compare device names to eliminate duplicates. |
ef416fc2 | 428 | */ |
429 | ||
430 | static int /* O - Result of comparison */ | |
ae71f5de MS |
431 | compare_devices(cupsd_device_t *d0, /* I - First device */ |
432 | cupsd_device_t *d1) /* I - Second device */ | |
ef416fc2 | 433 | { |
434 | int diff; /* Difference between strings */ | |
435 | ||
436 | ||
437 | /* | |
438 | * Sort devices by device-info, device-class, and device-uri... | |
439 | */ | |
440 | ||
441 | if ((diff = cupsdCompareNames(d0->device_info, d1->device_info)) != 0) | |
442 | return (diff); | |
443 | else if ((diff = strcasecmp(d0->device_class, d1->device_class)) != 0) | |
444 | return (diff); | |
445 | else | |
446 | return (strcasecmp(d0->device_uri, d1->device_uri)); | |
447 | } | |
448 | ||
449 | ||
cc0d019f | 450 | /* |
ae71f5de | 451 | * 'create_strings_array()' - Create a CUPS array of strings. |
cc0d019f MS |
452 | */ |
453 | ||
ae71f5de MS |
454 | static cups_array_t * /* O - CUPS array */ |
455 | create_strings_array(const char *s) /* I - Comma-delimited strings */ | |
cc0d019f | 456 | { |
ae71f5de MS |
457 | cups_array_t *a; /* CUPS array */ |
458 | const char *start, /* Start of string */ | |
459 | *end; /* End of string */ | |
460 | char *ptr; /* New string */ | |
461 | ||
462 | ||
463 | if (!s) | |
464 | return (NULL); | |
465 | ||
466 | if ((a = cupsArrayNew((cups_array_func_t)strcmp, NULL)) != NULL) | |
467 | { | |
468 | for (start = end = s; *end; start = end + 1) | |
469 | { | |
470 | /* | |
471 | * Find the end of the current delimited string... | |
472 | */ | |
473 | ||
474 | if ((end = strchr(start, ',')) == NULL) | |
475 | end = start + strlen(start); | |
476 | ||
477 | /* | |
478 | * Duplicate the string and add it to the array... | |
479 | */ | |
480 | ||
481 | if ((ptr = calloc(1, end - start + 1)) == NULL) | |
482 | break; | |
cc0d019f | 483 | |
ae71f5de MS |
484 | memcpy(ptr, start, end - start); |
485 | cupsArrayAdd(a, ptr); | |
486 | } | |
487 | } | |
488 | ||
489 | return (a); | |
490 | } | |
491 | ||
492 | ||
493 | /* | |
494 | * 'get_current_time()' - Get the current time as a double value in seconds. | |
495 | */ | |
496 | ||
497 | static double /* O - Time in seconds */ | |
498 | get_current_time(void) | |
499 | { | |
500 | struct timeval curtime; /* Current time */ | |
501 | ||
502 | ||
503 | gettimeofday(&curtime, NULL); | |
504 | ||
505 | return (curtime.tv_sec + 0.000001 * curtime.tv_usec); | |
506 | } | |
507 | ||
508 | ||
509 | /* | |
510 | * 'get_device()' - Get a device from a backend. | |
511 | */ | |
512 | ||
513 | static int /* O - 0 on success, -1 on error */ | |
514 | get_device(cupsd_backend_t *backend) /* I - Backend to read from */ | |
515 | { | |
516 | char line[2048], /* Line from backend */ | |
749b1e90 MS |
517 | temp[2048], /* Copy of line */ |
518 | *ptr, /* Pointer into line */ | |
519 | *dclass, /* Device class */ | |
520 | *uri, /* Device URI */ | |
521 | *make_model, /* Make and model */ | |
522 | *info, /* Device info */ | |
523 | *device_id, /* 1284 device ID */ | |
524 | *location; /* Physical location */ | |
ae71f5de MS |
525 | |
526 | ||
527 | if (cupsFileGets(backend->pipe, line, sizeof(line))) | |
528 | { | |
529 | /* | |
530 | * Each line is of the form: | |
531 | * | |
749b1e90 MS |
532 | * class URI "make model" "name" ["1284 device ID"] ["location"] |
533 | */ | |
534 | ||
535 | strlcpy(temp, line, sizeof(temp)); | |
536 | ||
537 | /* | |
538 | * device-class | |
539 | */ | |
540 | ||
541 | dclass = temp; | |
542 | ||
543 | for (ptr = temp; *ptr; ptr ++) | |
544 | if (isspace(*ptr & 255)) | |
545 | break; | |
546 | ||
547 | while (isspace(*ptr & 255)) | |
548 | *ptr++ = '\0'; | |
549 | ||
550 | /* | |
551 | * device-uri | |
ae71f5de MS |
552 | */ |
553 | ||
749b1e90 MS |
554 | if (!*ptr) |
555 | goto error; | |
ae71f5de | 556 | |
749b1e90 MS |
557 | for (uri = ptr; *ptr; ptr ++) |
558 | if (isspace(*ptr & 255)) | |
559 | break; | |
560 | ||
561 | while (isspace(*ptr & 255)) | |
562 | *ptr++ = '\0'; | |
563 | ||
564 | /* | |
565 | * device-make-and-model | |
566 | */ | |
567 | ||
568 | if (*ptr != '\"') | |
569 | goto error; | |
570 | ||
571 | for (ptr ++, make_model = ptr; *ptr && *ptr != '\"'; ptr ++) | |
ae71f5de | 572 | { |
749b1e90 MS |
573 | if (*ptr == '\\' && ptr[1]) |
574 | _cups_strcpy(ptr, ptr + 1); | |
575 | } | |
576 | ||
577 | if (*ptr != '\"') | |
578 | goto error; | |
ae71f5de | 579 | |
749b1e90 MS |
580 | for (*ptr++ = '\0'; isspace(*ptr & 255); *ptr++ = '\0'); |
581 | ||
582 | /* | |
583 | * device-info | |
584 | */ | |
ae71f5de | 585 | |
749b1e90 MS |
586 | if (*ptr != '\"') |
587 | goto error; | |
588 | ||
589 | for (ptr ++, info = ptr; *ptr && *ptr != '\"'; ptr ++) | |
590 | { | |
591 | if (*ptr == '\\' && ptr[1]) | |
592 | _cups_strcpy(ptr, ptr + 1); | |
ae71f5de | 593 | } |
749b1e90 MS |
594 | |
595 | if (*ptr != '\"') | |
596 | goto error; | |
597 | ||
598 | for (*ptr++ = '\0'; isspace(*ptr & 255); *ptr++ = '\0'); | |
599 | ||
600 | /* | |
601 | * device-id | |
602 | */ | |
603 | ||
604 | if (*ptr == '\"') | |
ae71f5de | 605 | { |
749b1e90 MS |
606 | for (ptr ++, device_id = ptr; *ptr && *ptr != '\"'; ptr ++) |
607 | { | |
608 | if (*ptr == '\\' && ptr[1]) | |
609 | _cups_strcpy(ptr, ptr + 1); | |
610 | } | |
611 | ||
612 | if (*ptr != '\"') | |
613 | goto error; | |
614 | ||
615 | for (*ptr++ = '\0'; isspace(*ptr & 255); *ptr++ = '\0'); | |
616 | ||
ae71f5de | 617 | /* |
749b1e90 | 618 | * device-location |
ae71f5de MS |
619 | */ |
620 | ||
749b1e90 MS |
621 | if (*ptr == '\"') |
622 | { | |
623 | for (ptr ++, location = ptr; *ptr && *ptr != '\"'; ptr ++) | |
624 | { | |
625 | if (*ptr == '\\' && ptr[1]) | |
626 | _cups_strcpy(ptr, ptr + 1); | |
627 | } | |
628 | ||
629 | if (*ptr != '\"') | |
630 | goto error; | |
631 | ||
632 | *ptr = '\0'; | |
633 | } | |
634 | else | |
635 | location = NULL; | |
636 | } | |
637 | else | |
638 | { | |
639 | device_id = NULL; | |
640 | location = NULL; | |
ae71f5de MS |
641 | } |
642 | ||
749b1e90 MS |
643 | /* |
644 | * Add the device to the array of available devices... | |
645 | */ | |
646 | ||
647 | if (!add_device(dclass, make_model, info, uri, device_id, location)) | |
648 | fprintf(stderr, "DEBUG: [cups-deviced] Found device \"%s\"...\n", uri); | |
649 | ||
ae71f5de MS |
650 | return (0); |
651 | } | |
652 | ||
653 | /* | |
654 | * End of file... | |
655 | */ | |
656 | ||
657 | cupsFileClose(backend->pipe); | |
658 | backend->pipe = NULL; | |
659 | ||
660 | return (-1); | |
749b1e90 MS |
661 | |
662 | /* | |
663 | * Bad format; strip trailing newline and write an error message. | |
664 | */ | |
665 | ||
666 | error: | |
667 | ||
668 | if (line[strlen(line) - 1] == '\n') | |
669 | line[strlen(line) - 1] = '\0'; | |
670 | ||
671 | fprintf(stderr, "ERROR: [cups-deviced] Bad line from \"%s\": %s\n", | |
672 | backend->name, line); | |
673 | return (0); | |
ae71f5de MS |
674 | } |
675 | ||
676 | ||
677 | /* | |
678 | * 'process_children()' - Process all dead children... | |
679 | */ | |
680 | ||
681 | static void | |
682 | process_children(void) | |
683 | { | |
684 | int i; /* Looping var */ | |
685 | int status; /* Exit status of child */ | |
686 | int pid; /* Process ID of child */ | |
687 | cupsd_backend_t *backend; /* Current backend */ | |
688 | const char *name; /* Name of process */ | |
689 | ||
690 | ||
691 | /* | |
692 | * Reset the dead_children flag... | |
693 | */ | |
694 | ||
695 | dead_children = 0; | |
696 | ||
697 | /* | |
698 | * Collect the exit status of some children... | |
699 | */ | |
700 | ||
701 | #ifdef HAVE_WAITPID | |
702 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) | |
703 | #elif defined(HAVE_WAIT3) | |
704 | while ((pid = wait3(&status, WNOHANG, NULL)) > 0) | |
705 | #else | |
706 | if ((pid = wait(&status)) > 0) | |
707 | #endif /* HAVE_WAITPID */ | |
708 | { | |
709 | if (status == SIGTERM) | |
710 | status = 0; | |
711 | ||
712 | for (i = num_backends, backend = backends; i > 0; i --, backend ++) | |
713 | if (backend->pid == pid) | |
714 | break; | |
715 | ||
716 | if (i > 0) | |
717 | { | |
718 | name = backend->name; | |
719 | backend->pid = 0; | |
720 | backend->status = status; | |
721 | ||
722 | active_backends --; | |
723 | } | |
724 | else | |
725 | name = "Unknown"; | |
726 | ||
727 | if (status) | |
728 | { | |
729 | if (WIFEXITED(status)) | |
730 | fprintf(stderr, | |
731 | "ERROR: [cups-deviced] PID %d (%s) stopped with status %d!\n", | |
732 | pid, name, WEXITSTATUS(status)); | |
733 | else | |
734 | fprintf(stderr, | |
735 | "ERROR: [cups-deviced] PID %d (%s) crashed on signal %d!\n", | |
736 | pid, name, WTERMSIG(status)); | |
737 | } | |
738 | else | |
739 | fprintf(stderr, | |
740 | "DEBUG: [cups-deviced] PID %d (%s) exited with no errors.\n", | |
741 | pid, name); | |
742 | } | |
743 | } | |
744 | ||
745 | ||
746 | /* | |
747 | * 'sigchld_handler()' - Handle 'child' signals from old processes. | |
748 | */ | |
749 | ||
750 | static void | |
751 | sigchld_handler(int sig) /* I - Signal number */ | |
752 | { | |
753 | (void)sig; | |
754 | ||
755 | /* | |
756 | * Flag that we have dead children... | |
757 | */ | |
758 | ||
759 | dead_children = 1; | |
760 | ||
761 | /* | |
762 | * Reset the signal handler as needed... | |
763 | */ | |
764 | ||
765 | #if !defined(HAVE_SIGSET) && !defined(HAVE_SIGACTION) | |
766 | signal(SIGCLD, sigchld_handler); | |
767 | #endif /* !HAVE_SIGSET && !HAVE_SIGACTION */ | |
768 | } | |
769 | ||
770 | ||
771 | /* | |
772 | * 'start_backend()' - Run a backend to gather the available devices. | |
773 | */ | |
774 | ||
775 | static int /* O - 0 on success, -1 on error */ | |
776 | start_backend(const char *name, /* I - Backend to run */ | |
777 | int root) /* I - Run as root? */ | |
778 | { | |
779 | const char *server_bin; /* CUPS_SERVERBIN environment variable */ | |
780 | char program[1024]; /* Full path to backend */ | |
ae71f5de | 781 | cupsd_backend_t *backend; /* Current backend */ |
c934a06c | 782 | char *argv[2]; /* Command-line arguments */ |
ae71f5de MS |
783 | |
784 | ||
785 | if (num_backends >= MAX_BACKENDS) | |
786 | { | |
787 | fprintf(stderr, "ERROR: Too many backends (%d)!\n", num_backends); | |
788 | return (-1); | |
789 | } | |
cc0d019f | 790 | |
ae71f5de MS |
791 | if ((server_bin = getenv("CUPS_SERVERBIN")) == NULL) |
792 | server_bin = CUPS_SERVERBIN; | |
793 | ||
794 | snprintf(program, sizeof(program), "%s/backend/%s", server_bin, name); | |
795 | ||
796 | backend = backends + num_backends; | |
797 | ||
c934a06c MS |
798 | argv[0] = (char *)name; |
799 | argv[1] = NULL; | |
cc0d019f | 800 | |
c934a06c MS |
801 | if ((backend->pipe = cupsdPipeCommand(&(backend->pid), program, argv, |
802 | root ? 0 : normal_user)) == NULL) | |
cc0d019f | 803 | { |
ae71f5de MS |
804 | fprintf(stderr, "ERROR: [cups-deviced] Unable to execute \"%s\" - %s\n", |
805 | program, strerror(errno)); | |
c934a06c | 806 | return (-1); |
cc0d019f MS |
807 | } |
808 | ||
809 | /* | |
c934a06c | 810 | * Fill in the rest of the backend information... |
cc0d019f MS |
811 | */ |
812 | ||
ae71f5de MS |
813 | fprintf(stderr, "DEBUG: [cups-deviced] Started backend %s (PID %d)\n", |
814 | program, backend->pid); | |
cc0d019f | 815 | |
c934a06c | 816 | backend_fds[num_backends].fd = cupsFileNumber(backend->pipe); |
ae71f5de | 817 | backend_fds[num_backends].events = POLLIN; |
cc0d019f | 818 | |
ae71f5de MS |
819 | backend->name = strdup(name); |
820 | backend->status = 0; | |
ae71f5de | 821 | backend->count = 0; |
ef416fc2 | 822 | |
ae71f5de MS |
823 | active_backends ++; |
824 | num_backends ++; | |
ef416fc2 | 825 | |
ae71f5de | 826 | return (0); |
ef416fc2 | 827 | } |
828 | ||
829 | ||
830 | /* | |
b19ccc9e | 831 | * End of "$Id: cups-deviced.c 7816 2008-07-30 20:53:31Z mike $". |
ef416fc2 | 832 | */ |