int /* O - Exit code */
main(int argc, /* I - Number of command-line args */
char *argv[]) /* I - Command-line arguments */
{
int i; /* Looping var */
int request_id; /* Request ID */
int timeout; /* Timeout in seconds */
const char *server_bin; /* CUPS_SERVERBIN environment variable */
char filename[1024]; /* Backend directory filename */
cups_dir_t *dir; /* Directory pointer */
cups_dentry_t *dent; /* Directory entry */
double current_time, /* Current time */
end_time; /* Ending time */
int num_options; /* Number of options */
cups_option_t *options; /* Options */
cups_array_t *requested, /* requested-attributes values */
*exclude, /* exclude-schemes values */
*include; /* include-schemes values */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
setbuf(stderr, NULL);
/*
* Check the command-line...
*/
if (argc != 6)
{
fputs("Usage: cups-deviced request-id limit timeout user-id options\n", stderr);
return (1);
}
request_id = atoi(argv[1]);
if (request_id < 1)
{
fprintf(stderr, "ERROR: [cups-deviced] Bad request ID %d!\n", request_id);
return (1);
}
device_limit = atoi(argv[2]);
if (device_limit < 0)
{
fprintf(stderr, "ERROR: [cups-deviced] Bad limit %d!\n", device_limit);
return (1);
}
timeout = atoi(argv[3]);
if (timeout < 1)
{
fprintf(stderr, "ERROR: [cups-deviced] Bad timeout %d!\n", timeout);
return (1);
}
normal_user = atoi(argv[4]);
if (normal_user <= 0)
{
fprintf(stderr, "ERROR: [cups-deviced] Bad user %d!\n", normal_user);
return (1);
}
num_options = cupsParseOptions(argv[5], 0, &options);
requested = cupsdCreateStringsArray(cupsGetOption("requested-attributes",
num_options, options));
exclude = cupsdCreateStringsArray(cupsGetOption("exclude-schemes",
num_options, options));
include = cupsdCreateStringsArray(cupsGetOption("include-schemes",
num_options, options));
if (!requested || cupsArrayFind(requested, "all") != NULL)
{
send_class = send_info = send_make_and_model = send_uri = send_id =
send_location = 1;
}
else
{
send_class = cupsArrayFind(requested, "device-class") != NULL;
send_info = cupsArrayFind(requested, "device-info") != NULL;
send_make_and_model = cupsArrayFind(requested, "device-make-and-model") != NULL;
send_uri = cupsArrayFind(requested, "device-uri") != NULL;
send_id = cupsArrayFind(requested, "device-id") != NULL;
send_location = cupsArrayFind(requested, "device-location") != NULL;
}
/*
* Listen to child signals...
*/
#ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
sigset(SIGCHLD, sigchld_handler);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGCHLD);
action.sa_handler = sigchld_handler;
sigaction(SIGCHLD, &action, NULL);
#else
signal(SIGCLD, sigchld_handler); /* No, SIGCLD isn't a typo... */
#endif /* HAVE_SIGSET */
/*
* Try opening the backend directory...
*/
if ((server_bin = getenv("CUPS_SERVERBIN")) == NULL)
server_bin = CUPS_SERVERBIN;
snprintf(filename, sizeof(filename), "%s/backend", server_bin);
if ((dir = cupsDirOpen(filename)) == NULL)
{
fprintf(stderr, "ERROR: [cups-deviced] Unable to open backend directory "
"\"%s\": %s", filename, strerror(errno));
return (1);
}
/*
* Setup the devices array...
*/
devices = cupsArrayNew((cups_array_func_t)compare_devices, NULL);
/*
* Loop through all of the device backends...
*/
while ((dent = cupsDirRead(dir)) != NULL)
{
/*
* Skip entries that are not executable files...
*/
if (!S_ISREG(dent->fileinfo.st_mode) ||
!isalnum(dent->filename[0] & 255) ||
(dent->fileinfo.st_mode & (S_IRUSR | S_IXUSR)) != (S_IRUSR | S_IXUSR))
continue;
/*
* Skip excluded or not included backends...
*/
if (cupsArrayFind(exclude, dent->filename) ||
(include && !cupsArrayFind(include, dent->filename)))
continue;
/*
* Backends without permissions for normal users run as root,
* all others run as the unprivileged user...
*/
start_backend(dent->filename,
!(dent->fileinfo.st_mode & (S_IRWXG | S_IRWXO)));
}
cupsDirClose(dir);
/*
* Collect devices...
*/
if (getenv("SOFTWARE"))
puts("Content-Type: application/ipp\n");
cupsdSendIPPHeader(IPP_OK, request_id);
cupsdSendIPPGroup(IPP_TAG_OPERATION);
cupsdSendIPPString(IPP_TAG_CHARSET, "attributes-charset", "utf-8");
cupsdSendIPPString(IPP_TAG_LANGUAGE, "attributes-natural-language", "en-US");
end_time = get_current_time() + timeout;
while (active_backends > 0 && (current_time = get_current_time()) < end_time)
{
/*
* Collect the output from the backends...
*/
timeout = (int)(1000 * (end_time - current_time));
if (poll(backend_fds, num_backends, timeout) > 0)
{
for (i = 0; i < num_backends; i ++)
if (backend_fds[i].revents && backends[i].pipe)
{
cups_file_t *bpipe = backends[i].pipe;
/* Copy of pipe for backend... */
do
{
if (get_device(backends + i))
{
backend_fds[i].fd = 0;
backend_fds[i].events = 0;
break;
}
}
while (bpipe->ptr &&
memchr(bpipe->ptr, '\n', bpipe->end - bpipe->ptr));
}
}
/*
* Get exit status from children...
*/
if (dead_children)
process_children();
}
cupsdSendIPPTrailer();
/*
* Terminate any remaining backends and exit...
*/
if (active_backends > 0)
{
for (i = 0; i < num_backends; i ++)
if (backends[i].pid)
kill(backends[i].pid, SIGTERM);
}
return (0);
}
int /* O - Exit code */
main(int argc, /* I - Number of command-line args */
char *argv[]) /* I - Command-line arguments */
{
const char *server_bin; /* CUPS_SERVERBIN environment variable */
char backends[1024]; /* Location of backends */
int request_id; /* Request ID */
int count; /* Number of devices from backend */
int compat; /* Compatibility device? */
char *backend_argv[2]; /* Arguments for backend */
cups_file_t *fp; /* Pipe to device backend */
int pid; /* Process ID of backend */
cups_dir_t *dir; /* Directory pointer */
cups_dentry_t *dent; /* Directory entry */
char filename[1024], /* Name of backend */
line[2048], /* Line from backend */
dclass[64], /* Device class */
uri[1024], /* Device URI */
info[128], /* Device info */
make_model[256], /* Make and model */
device_id[1024]; /* 1284 device ID */
int num_options; /* Number of options */
cups_option_t *options; /* Options */
const char *requested; /* requested-attributes option */
int send_class, /* Send device-class attribute? */
send_info, /* Send device-info attribute? */
send_make_and_model, /* Send device-make-and-model attribute? */
send_uri, /* Send device-uri attribute? */
send_id; /* Send device-id attribute? */
dev_info_t *dev; /* Current device */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
setbuf(stderr, NULL);
/*
* Check the command-line...
*/
if (argc > 1)
request_id = atoi(argv[1]);
else
request_id = 1;
if (argc != 5)
{
fputs("Usage: cups-deviced request-id limit user-id options\n", stderr);
return (1);
}
if (request_id < 1)
{
fprintf(stderr, "cups-deviced: Bad request ID %d!\n", request_id);
return (1);
}
normal_user = atoi(argv[3]);
if (normal_user <= 0)
{
fprintf(stderr, "cups-deviced: Bad user %d!\n", normal_user);
return (1);
}
num_options = cupsParseOptions(argv[4], 0, &options);
requested = cupsGetOption("requested-attributes", num_options, options);
if (!requested || strstr(requested, "all"))
{
send_class = 1;
send_info = 1;
send_make_and_model = 1;
send_uri = 1;
send_id = 1;
}
else
{
send_class = strstr(requested, "device-class") != NULL;
send_info = strstr(requested, "device-info") != NULL;
send_make_and_model = strstr(requested, "device-make-and-model") != NULL;
send_uri = strstr(requested, "device-uri") != NULL;
send_id = strstr(requested, "device-id") != NULL;
}
/*
* Try opening the backend directory...
*/
if ((server_bin = getenv("CUPS_SERVERBIN")) == NULL)
server_bin = CUPS_SERVERBIN;
snprintf(backends, sizeof(backends), "%s/backend", server_bin);
if ((dir = cupsDirOpen(backends)) == NULL)
{
fprintf(stderr, "ERROR: [cups-deviced] Unable to open backend directory "
"\"%s\": %s", backends, strerror(errno));
return (1);
}
/*
* Setup the devices array...
*/
devs = cupsArrayNew((cups_array_func_t)compare_devs, NULL);
/*
* Loop through all of the device backends...
*/
while ((dent = cupsDirRead(dir)) != NULL)
{
/*
* Skip entries that are not executable files...
*/
if (!S_ISREG(dent->fileinfo.st_mode) ||
(dent->fileinfo.st_mode & (S_IRUSR | S_IXUSR)) != (S_IRUSR | S_IXUSR))
continue;
/*
* Change effective users depending on the backend permissions...
*/
snprintf(filename, sizeof(filename), "%s/%s", backends, dent->filename);
/*
* Backends without permissions for normal users run as root,
* all others run as the unprivileged user...
*/
backend_argv[0] = dent->filename;
backend_argv[1] = NULL;
fp = cupsdPipeCommand(&pid, filename, backend_argv,
(dent->fileinfo.st_mode & (S_IRWXG | S_IRWXO))
? normal_user : 0);
/*
* Collect the output from the backend...
*/
if (fp)
{
/*
* Set an alarm for the first read from the backend; this avoids
* problems when a backend is hung getting device information.
*/
#ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
sigset(SIGALRM, sigalrm_handler);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
sigaddset(&action.sa_mask, SIGALRM);
action.sa_handler = sigalrm_handler;
sigaction(SIGALRM, &action, NULL);
#else
signal(SIGALRM, sigalrm_handler);
#endif /* HAVE_SIGSET */
alarm_tripped = 0;
count = 0;
compat = !strcmp(dent->filename, "smb");
alarm(30);
while (cupsFileGets(fp, line, sizeof(line)))
{
/*
* Reset the alarm clock...
*/
alarm(30);
/*
* Each line is of the form:
*
* class URI "make model" "name" ["1284 device ID"]
*/
device_id[0] = '\0';
if (!strncasecmp(line, "Usage", 5))
compat = 1;
else if (sscanf(line,
"%63s%1023s%*[ \t]\"%255[^\"]\"%*[ \t]\"%127[^\"]\""
"%*[ \t]\"%1023[^\"]",
dclass, uri, make_model, info, device_id) < 4)
{
/*
* Bad format; strip trailing newline and write an error message.
*/
if (line[strlen(line) - 1] == '\n')
line[strlen(line) - 1] = '\0';
fprintf(stderr, "ERROR: [cups-deviced] Bad line from \"%s\": %s\n",
dent->filename, line);
compat = 1;
break;
}
else
{
/*
* Add the device to the array of available devices...
*/
dev = add_dev(dclass, make_model, info, uri, device_id);
if (!dev)
{
cupsDirClose(dir);
cupsFileClose(fp);
kill(pid, SIGTERM);
return (1);
}
fprintf(stderr, "DEBUG: [cups-deviced] Added device \"%s\"...\n",
uri);
count ++;
}
}
/*
* Turn the alarm clock off and close the pipe to the command...
*/
alarm(0);
if (alarm_tripped)
fprintf(stderr, "WARNING: [cups-deviced] Backend \"%s\" did not "
"respond within 30 seconds!\n", dent->filename);
cupsFileClose(fp);
kill(pid, SIGTERM);
/*
* Hack for backends that don't support the CUPS 1.1 calling convention:
* add a network device with the method == backend name.
*/
if (count == 0 && compat)
{
snprintf(line, sizeof(line), "Unknown Network Device (%s)",
dent->filename);
dev = add_dev("network", line, "Unknown", dent->filename, "");
if (!dev)
{
cupsDirClose(dir);
return (1);
}
fprintf(stderr, "DEBUG: [cups-deviced] Compatibility device "
"\"%s\"...\n", dent->filename);
}
}
else
fprintf(stderr, "WARNING: [cups-deviced] Unable to execute \"%s\" "
"backend: %s\n", dent->filename, strerror(errno));
}
cupsDirClose(dir);
/*
* Output the list of devices...
*/
puts("Content-Type: application/ipp\n");
cupsdSendIPPHeader(IPP_OK, request_id);
cupsdSendIPPGroup(IPP_TAG_OPERATION);
cupsdSendIPPString(IPP_TAG_CHARSET, "attributes-charset", "utf-8");
cupsdSendIPPString(IPP_TAG_LANGUAGE, "attributes-natural-language", "en-US");
if ((count = atoi(argv[2])) <= 0)
count = cupsArrayCount(devs);
if (count > cupsArrayCount(devs))
count = cupsArrayCount(devs);
for (dev = (dev_info_t *)cupsArrayFirst(devs);
count > 0;
count --, dev = (dev_info_t *)cupsArrayNext(devs))
{
/*
* Add strings to attributes...
*/
cupsdSendIPPGroup(IPP_TAG_PRINTER);
if (send_class)
cupsdSendIPPString(IPP_TAG_KEYWORD, "device-class", dev->device_class);
if (send_info)
cupsdSendIPPString(IPP_TAG_TEXT, "device-info", dev->device_info);
if (send_make_and_model)
cupsdSendIPPString(IPP_TAG_TEXT, "device-make-and-model",
dev->device_make_and_model);
if (send_uri)
cupsdSendIPPString(IPP_TAG_URI, "device-uri", dev->device_uri);
if (send_id)
cupsdSendIPPString(IPP_TAG_TEXT, "device-id", dev->device_id);
}
cupsdSendIPPTrailer();
/*
* Free the devices array and return...
*/
for (dev = (dev_info_t *)cupsArrayFirst(devs);
dev;
dev = (dev_info_t *)cupsArrayNext(devs))
free(dev);
cupsArrayDelete(devs);
return (0);
}
