printing/print_cups.c

説明を見る。

/*
 * Support code for the Common UNIX Printing System ("CUPS")
 *
 * Copyright 1999-2003 by Michael R Sweet.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "includes.h"
#include "printing.h"

#ifdef HAVE_CUPS
#include <cups/cups.h>
#include <cups/language.h>

extern userdom_struct current_user_info;

/*
 * 'cups_passwd_cb()' - The CUPS password callback...
 */

static const char *                             /* O - Password or NULL */
cups_passwd_cb(const char *prompt)      /* I - Prompt */
{
        /*
         * Always return NULL to indicate that no password is available...
         */

        return (NULL);
}

static http_t *cups_connect(void)
{
        http_t *http;
        char *server, *p;
        int port;
        
        if (lp_cups_server() != NULL && strlen(lp_cups_server()) > 0) {
                server = smb_xstrdup(lp_cups_server());
        } else {
                server = smb_xstrdup(cupsServer());
        }

        p = strchr(server, ':');
        if (p) {
                port = atoi(p+1);
                *p = '\0';
        } else {
                port = ippPort();
        }
        
        DEBUG(10, ("connecting to cups server %s:%d\n",
                   server, port));

        if ((http = httpConnect(server, port)) == NULL) {
                DEBUG(0,("Unable to connect to CUPS server %s:%d - %s\n", 
                         server, port, strerror(errno)));
                SAFE_FREE(server);
                return NULL;
        }

        SAFE_FREE(server);
        return http;
}

BOOL cups_cache_reload(void)
{
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        ipp_attribute_t *attr;          /* Current attribute */
        cups_lang_t     *language = NULL;       /* Default language */
        char            *name,          /* printer-name attribute */
                        *info;          /* printer-info attribute */
        static const char *requested[] =/* Requested attributes */
                        {
                          "printer-name",
                          "printer-info"
                        };       
        BOOL ret = False;

        DEBUG(5, ("reloading cups printcap cache\n"));

       /*
        * Make sure we don't ask for passwords...
        */

        cupsSetPasswordCB(cups_passwd_cb);

       /*
        * Try to connect to the server...
        */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

       /*
        * Build a CUPS_GET_PRINTERS request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    requested-attributes
        */

        request = ippNew();

        request->request.op.operation_id = CUPS_GET_PRINTERS;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
                      "requested-attributes",
                      (sizeof(requested) / sizeof(requested[0])),
                      NULL, requested);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/")) == NULL) {
                DEBUG(0,("Unable to get printer list - %s\n",
                         ippErrorString(cupsLastError())));
                goto out;
        }

        for (attr = response->attrs; attr != NULL;) {
               /*
                * Skip leading attributes until we hit a printer...
                */

                while (attr != NULL && attr->group_tag != IPP_TAG_PRINTER)
                        attr = attr->next;

                if (attr == NULL)
                        break;

               /*
                * Pull the needed attributes from this printer...
                */

                name       = NULL;
                info       = NULL;

                while (attr != NULL && attr->group_tag == IPP_TAG_PRINTER) {
                        if (strcmp(attr->name, "printer-name") == 0 &&
                            attr->value_tag == IPP_TAG_NAME)
                                name = attr->values[0].string.text;

                        if (strcmp(attr->name, "printer-info") == 0 &&
                            attr->value_tag == IPP_TAG_TEXT)
                                info = attr->values[0].string.text;

                        attr = attr->next;
                }

               /*
                * See if we have everything needed...
                */

                if (name == NULL)
                        break;

                if (!pcap_cache_add(name, info)) {
                        goto out;
                }
        }

        ippDelete(response);
        response = NULL;

       /*
        * Build a CUPS_GET_CLASSES request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    requested-attributes
        */

        request = ippNew();

        request->request.op.operation_id = CUPS_GET_CLASSES;
        request->request.op.request_id   = 1;

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
                      "requested-attributes",
                      (sizeof(requested) / sizeof(requested[0])),
                      NULL, requested);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/")) == NULL) {
                DEBUG(0,("Unable to get printer list - %s\n",
                         ippErrorString(cupsLastError())));
                goto out;
        }

        for (attr = response->attrs; attr != NULL;) {
               /*
                * Skip leading attributes until we hit a printer...
                */

                while (attr != NULL && attr->group_tag != IPP_TAG_PRINTER)
                        attr = attr->next;

                if (attr == NULL)
                        break;

               /*
                * Pull the needed attributes from this printer...
                */

                name       = NULL;
                info       = NULL;

                while (attr != NULL && attr->group_tag == IPP_TAG_PRINTER) {
                        if (strcmp(attr->name, "printer-name") == 0 &&
                            attr->value_tag == IPP_TAG_NAME)
                                name = attr->values[0].string.text;

                        if (strcmp(attr->name, "printer-info") == 0 &&
                            attr->value_tag == IPP_TAG_TEXT)
                                info = attr->values[0].string.text;

                        attr = attr->next;
                }

               /*
                * See if we have everything needed...
                */

                if (name == NULL)
                        break;

                if (!pcap_cache_add(name, info)) {
                        goto out;
                }
        }

        ret = True;

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}


/*
 * 'cups_job_delete()' - Delete a job.
 */

static int cups_job_delete(const char *sharename, const char *lprm_command, struct printjob *pjob)
{
        int             ret = 1;                /* Return value */
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        cups_lang_t     *language = NULL;       /* Default language */
        char            uri[HTTP_MAX_URI]; /* printer-uri attribute */


        DEBUG(5,("cups_job_delete(%s, %p (%d))\n", sharename, pjob, pjob->sysjob));

       /*
        * Make sure we don't ask for passwords...
        */

        cupsSetPasswordCB(cups_passwd_cb);

       /*
        * Try to connect to the server...
        */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

       /*
        * Build an IPP_CANCEL_JOB request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    job-uri
        *    requesting-user-name
        */

        request = ippNew();

        request->request.op.operation_id = IPP_CANCEL_JOB;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        slprintf(uri, sizeof(uri) - 1, "ipp://localhost/jobs/%d", pjob->sysjob);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "job-uri", NULL, uri);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
                     NULL, pjob->user);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/jobs")) != NULL) {
                if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                        DEBUG(0,("Unable to cancel job %d - %s\n", pjob->sysjob,
                                ippErrorString(cupsLastError())));
                } else {
                        ret = 0;
                }
        } else {
                DEBUG(0,("Unable to cancel job %d - %s\n", pjob->sysjob,
                        ippErrorString(cupsLastError())));
        }

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}


/*
 * 'cups_job_pause()' - Pause a job.
 */

static int cups_job_pause(int snum, struct printjob *pjob)
{
        int             ret = 1;                /* Return value */
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        cups_lang_t     *language = NULL;       /* Default language */
        char            uri[HTTP_MAX_URI]; /* printer-uri attribute */


        DEBUG(5,("cups_job_pause(%d, %p (%d))\n", snum, pjob, pjob->sysjob));

       /*
        * Make sure we don't ask for passwords...
        */

        cupsSetPasswordCB(cups_passwd_cb);

       /*
        * Try to connect to the server...
        */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

       /*
        * Build an IPP_HOLD_JOB request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    job-uri
        *    requesting-user-name
        */

        request = ippNew();

        request->request.op.operation_id = IPP_HOLD_JOB;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        slprintf(uri, sizeof(uri) - 1, "ipp://localhost/jobs/%d", pjob->sysjob);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "job-uri", NULL, uri);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
                     NULL, pjob->user);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/jobs")) != NULL) {
                if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                        DEBUG(0,("Unable to hold job %d - %s\n", pjob->sysjob,
                                ippErrorString(cupsLastError())));
                } else {
                        ret = 0;
                }
        } else {
                DEBUG(0,("Unable to hold job %d - %s\n", pjob->sysjob,
                        ippErrorString(cupsLastError())));
        }

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}


/*
 * 'cups_job_resume()' - Resume a paused job.
 */

static int cups_job_resume(int snum, struct printjob *pjob)
{
        int             ret = 1;                /* Return value */
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        cups_lang_t     *language = NULL;       /* Default language */
        char            uri[HTTP_MAX_URI]; /* printer-uri attribute */


        DEBUG(5,("cups_job_resume(%d, %p (%d))\n", snum, pjob, pjob->sysjob));

       /*
        * Make sure we don't ask for passwords...
        */

        cupsSetPasswordCB(cups_passwd_cb);

       /*
        * Try to connect to the server...
        */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

       /*
        * Build an IPP_RELEASE_JOB request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    job-uri
        *    requesting-user-name
        */

        request = ippNew();

        request->request.op.operation_id = IPP_RELEASE_JOB;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        slprintf(uri, sizeof(uri) - 1, "ipp://localhost/jobs/%d", pjob->sysjob);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "job-uri", NULL, uri);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
                     NULL, pjob->user);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/jobs")) != NULL) {
                if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                        DEBUG(0,("Unable to release job %d - %s\n", pjob->sysjob,
                                ippErrorString(cupsLastError())));
                } else {
                        ret = 0;
                }
        } else {
                DEBUG(0,("Unable to release job %d - %s\n", pjob->sysjob,
                        ippErrorString(cupsLastError())));
        }

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}


/*
 * 'cups_job_submit()' - Submit a job for printing.
 */

static int cups_job_submit(int snum, struct printjob *pjob)
{
        int             ret = 1;                /* Return value */
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        cups_lang_t     *language = NULL;       /* Default language */
        char            uri[HTTP_MAX_URI]; /* printer-uri attribute */
        char            *clientname = NULL;     /* hostname of client for job-originating-host attribute */
        pstring         new_jobname;
        int             num_options = 0; 
        cups_option_t   *options = NULL;

        DEBUG(5,("cups_job_submit(%d, %p (%d))\n", snum, pjob, pjob->sysjob));

       /*
        * Make sure we don't ask for passwords...
        */

        cupsSetPasswordCB(cups_passwd_cb);

       /*
        * Try to connect to the server...
        */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

       /*
        * Build an IPP_PRINT_JOB request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    printer-uri
        *    requesting-user-name
        *    [document-data]
        */

        request = ippNew();

        request->request.op.operation_id = IPP_PRINT_JOB;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        slprintf(uri, sizeof(uri) - 1, "ipp://localhost/printers/%s",
                 PRINTERNAME(snum));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
                     "printer-uri", NULL, uri);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
                     NULL, pjob->user);

        clientname = client_name();
        if (strcmp(clientname, "UNKNOWN") == 0) {
                clientname = client_addr();
        }

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
                     "job-originating-host-name", NULL,
                      clientname);

        pstr_sprintf(new_jobname,"%s%.8u %s", PRINT_SPOOL_PREFIX, 
                (unsigned int)pjob->smbjob, pjob->jobname);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "job-name", NULL,
                     new_jobname);

        /* 
         * add any options defined in smb.conf 
         */

        num_options = 0;
        options     = NULL;
        num_options = cupsParseOptions(lp_cups_options(snum), num_options, &options);

        if ( num_options )
                cupsEncodeOptions(request, num_options, options); 

       /*
        * Do the request and get back a response...
        */

        slprintf(uri, sizeof(uri) - 1, "/printers/%s", PRINTERNAME(snum));

        if ((response = cupsDoFileRequest(http, request, uri, pjob->filename)) != NULL) {
                if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                        DEBUG(0,("Unable to print file to %s - %s\n", PRINTERNAME(snum),
                                 ippErrorString(cupsLastError())));
                } else {
                        ret = 0;
                }
        } else {
                DEBUG(0,("Unable to print file to `%s' - %s\n", PRINTERNAME(snum),
                         ippErrorString(cupsLastError())));
        }

        if ( ret == 0 )
                unlink(pjob->filename);
        /* else print_job_end will do it for us */

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}

/*
 * 'cups_queue_get()' - Get all the jobs in the print queue.
 */

static int cups_queue_get(const char *sharename,
               enum printing_types printing_type,
               char *lpq_command,
               print_queue_struct **q, 
               print_status_struct *status)
{
        fstring         printername;
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        ipp_attribute_t *attr = NULL;           /* Current attribute */
        cups_lang_t     *language = NULL;       /* Default language */
        char            uri[HTTP_MAX_URI]; /* printer-uri attribute */
        int             qcount = 0,             /* Number of active queue entries */
                        qalloc = 0;             /* Number of queue entries allocated */
        print_queue_struct *queue = NULL,       /* Queue entries */
                        *temp;          /* Temporary pointer for queue */
        const char      *user_name,     /* job-originating-user-name attribute */
                        *job_name;      /* job-name attribute */
        int             job_id;         /* job-id attribute */
        int             job_k_octets;   /* job-k-octets attribute */
        time_t          job_time;       /* time-at-creation attribute */
        ipp_jstate_t    job_status;     /* job-status attribute */
        int             job_priority;   /* job-priority attribute */
        static const char *jattrs[] =   /* Requested job attributes */
                        {
                          "job-id",
                          "job-k-octets",
                          "job-name",
                          "job-originating-user-name",
                          "job-priority",
                          "job-state",
                          "time-at-creation",
                        };
        static const char *pattrs[] =   /* Requested printer attributes */
                        {
                          "printer-state",
                          "printer-state-message"
                        };

        *q = NULL;

        /* HACK ALERT!!!  The problem with support the 'printer name' 
           option is that we key the tdb off the sharename.  So we will 
           overload the lpq_command string to pass in the printername 
           (which is basically what we do for non-cups printers ... using 
           the lpq_command to get the queue listing). */

        fstrcpy( printername, lpq_command );

        DEBUG(5,("cups_queue_get(%s, %p, %p)\n", printername, q, status));

       /*
        * Make sure we don't ask for passwords...
        */

        cupsSetPasswordCB(cups_passwd_cb);

       /*
        * Try to connect to the server...
        */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

       /*
        * Generate the printer URI...
        */

        slprintf(uri, sizeof(uri) - 1, "ipp://localhost/printers/%s", printername);

       /*
        * Build an IPP_GET_JOBS request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    requested-attributes
        *    printer-uri
        */

        request = ippNew();

        request->request.op.operation_id = IPP_GET_JOBS;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
                      "requested-attributes",
                      (sizeof(jattrs) / sizeof(jattrs[0])),
                      NULL, jattrs);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
                     "printer-uri", NULL, uri);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/")) == NULL) {
                DEBUG(0,("Unable to get jobs for %s - %s\n", uri,
                         ippErrorString(cupsLastError())));
                goto out;
        }

        if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                DEBUG(0,("Unable to get jobs for %s - %s\n", uri,
                         ippErrorString(response->request.status.status_code)));
                goto out;
        }

       /*
        * Process the jobs...
        */

        qcount = 0;
        qalloc = 0;
        queue  = NULL;

        for (attr = response->attrs; attr != NULL; attr = attr->next) {
               /*
                * Skip leading attributes until we hit a job...
                */

                while (attr != NULL && attr->group_tag != IPP_TAG_JOB)
                        attr = attr->next;

                if (attr == NULL)
                        break;

               /*
                * Allocate memory as needed...
                */
                if (qcount >= qalloc) {
                        qalloc += 16;

                        queue = SMB_REALLOC_ARRAY(queue, print_queue_struct, qalloc);

                        if (queue == NULL) {
                                DEBUG(0,("cups_queue_get: Not enough memory!"));
                                qcount = 0;
                                goto out;
                        }
                }

                temp = queue + qcount;
                memset(temp, 0, sizeof(print_queue_struct));

               /*
                * Pull the needed attributes from this job...
                */

                job_id       = 0;
                job_priority = 50;
                job_status   = IPP_JOB_PENDING;
                job_time     = 0;
                job_k_octets = 0;
                user_name    = NULL;
                job_name     = NULL;

                while (attr != NULL && attr->group_tag == IPP_TAG_JOB) {
                        if (attr->name == NULL) {
                                attr = attr->next;
                                break;
                        }

                        if (strcmp(attr->name, "job-id") == 0 &&
                            attr->value_tag == IPP_TAG_INTEGER)
                                job_id = attr->values[0].integer;

                        if (strcmp(attr->name, "job-k-octets") == 0 &&
                            attr->value_tag == IPP_TAG_INTEGER)
                                job_k_octets = attr->values[0].integer;

                        if (strcmp(attr->name, "job-priority") == 0 &&
                            attr->value_tag == IPP_TAG_INTEGER)
                                job_priority = attr->values[0].integer;

                        if (strcmp(attr->name, "job-state") == 0 &&
                            attr->value_tag == IPP_TAG_ENUM)
                                job_status = (ipp_jstate_t)(attr->values[0].integer);

                        if (strcmp(attr->name, "time-at-creation") == 0 &&
                            attr->value_tag == IPP_TAG_INTEGER)
                                job_time = attr->values[0].integer;

                        if (strcmp(attr->name, "job-name") == 0 &&
                            attr->value_tag == IPP_TAG_NAME)
                                job_name = attr->values[0].string.text;

                        if (strcmp(attr->name, "job-originating-user-name") == 0 &&
                            attr->value_tag == IPP_TAG_NAME)
                                user_name = attr->values[0].string.text;

                        attr = attr->next;
                }

               /*
                * See if we have everything needed...
                */

                if (user_name == NULL || job_name == NULL || job_id == 0) {
                        if (attr == NULL)
                                break;
                        else
                                continue;
                }

                temp->job      = job_id;
                temp->size     = job_k_octets * 1024;
                temp->status   = job_status == IPP_JOB_PENDING ? LPQ_QUEUED :
                                 job_status == IPP_JOB_STOPPED ? LPQ_PAUSED :
                                 job_status == IPP_JOB_HELD ? LPQ_PAUSED :
                                 LPQ_PRINTING;
                temp->priority = job_priority;
                temp->time     = job_time;
                strncpy(temp->fs_user, user_name, sizeof(temp->fs_user) - 1);
                strncpy(temp->fs_file, job_name, sizeof(temp->fs_file) - 1);

                qcount ++;

                if (attr == NULL)
                        break;
        }

        ippDelete(response);
        response = NULL;

       /*
        * Build an IPP_GET_PRINTER_ATTRIBUTES request, which requires the
        * following attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    requested-attributes
        *    printer-uri
        */

        request = ippNew();

        request->request.op.operation_id = IPP_GET_PRINTER_ATTRIBUTES;
        request->request.op.request_id   = 1;

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
                      "requested-attributes",
                      (sizeof(pattrs) / sizeof(pattrs[0])),
                      NULL, pattrs);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
                     "printer-uri", NULL, uri);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/")) == NULL) {
                DEBUG(0,("Unable to get printer status for %s - %s\n", printername,
                         ippErrorString(cupsLastError())));
                *q = queue;
                goto out;
        }

        if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                DEBUG(0,("Unable to get printer status for %s - %s\n", printername,
                         ippErrorString(response->request.status.status_code)));
                *q = queue;
                goto out;
        }

       /*
        * Get the current printer status and convert it to the SAMBA values.
        */

        if ((attr = ippFindAttribute(response, "printer-state", IPP_TAG_ENUM)) != NULL) {
                if (attr->values[0].integer == IPP_PRINTER_STOPPED)
                        status->status = LPSTAT_STOPPED;
                else
                        status->status = LPSTAT_OK;
        }

        if ((attr = ippFindAttribute(response, "printer-state-message",
                                     IPP_TAG_TEXT)) != NULL)
                fstrcpy(status->message, attr->values[0].string.text);

       /*
        * Return the job queue...
        */

        *q = queue;

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return qcount;
}


/*
 * 'cups_queue_pause()' - Pause a print queue.
 */

static int cups_queue_pause(int snum)
{
        int             ret = 1;                /* Return value */
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        cups_lang_t     *language = NULL;       /* Default language */
        char            uri[HTTP_MAX_URI]; /* printer-uri attribute */


        DEBUG(5,("cups_queue_pause(%d)\n", snum));

        /*
         * Make sure we don't ask for passwords...
         */

        cupsSetPasswordCB(cups_passwd_cb);

        /*
         * Try to connect to the server...
         */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

        /*
         * Build an IPP_PAUSE_PRINTER request, which requires the following
         * attributes:
         *
         *    attributes-charset
         *    attributes-natural-language
         *    printer-uri
         *    requesting-user-name
         */

        request = ippNew();

        request->request.op.operation_id = IPP_PAUSE_PRINTER;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        slprintf(uri, sizeof(uri) - 1, "ipp://localhost/printers/%s",
                 PRINTERNAME(snum));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, uri);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
                     NULL, current_user_info.unix_name);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/admin/")) != NULL) {
                if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                        DEBUG(0,("Unable to pause printer %s - %s\n", PRINTERNAME(snum),
                                ippErrorString(cupsLastError())));
                } else {
                        ret = 0;
                }
        } else {
                DEBUG(0,("Unable to pause printer %s - %s\n", PRINTERNAME(snum),
                        ippErrorString(cupsLastError())));
        }

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}


/*
 * 'cups_queue_resume()' - Restart a print queue.
 */

static int cups_queue_resume(int snum)
{
        int             ret = 1;                /* Return value */
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        cups_lang_t     *language = NULL;       /* Default language */
        char            uri[HTTP_MAX_URI]; /* printer-uri attribute */


        DEBUG(5,("cups_queue_resume(%d)\n", snum));

       /*
        * Make sure we don't ask for passwords...
        */

        cupsSetPasswordCB(cups_passwd_cb);

       /*
        * Try to connect to the server...
        */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

       /*
        * Build an IPP_RESUME_PRINTER request, which requires the following
        * attributes:
        *
        *    attributes-charset
        *    attributes-natural-language
        *    printer-uri
        *    requesting-user-name
        */

        request = ippNew();

        request->request.op.operation_id = IPP_RESUME_PRINTER;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        slprintf(uri, sizeof(uri) - 1, "ipp://localhost/printers/%s",
                 PRINTERNAME(snum));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, uri);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_NAME, "requesting-user-name",
                     NULL, current_user_info.unix_name);

       /*
        * Do the request and get back a response...
        */

        if ((response = cupsDoRequest(http, request, "/admin/")) != NULL) {
                if (response->request.status.status_code >= IPP_OK_CONFLICT) {
                        DEBUG(0,("Unable to resume printer %s - %s\n", PRINTERNAME(snum),
                                ippErrorString(cupsLastError())));
                } else {
                        ret = 0;
                }
        } else {
                DEBUG(0,("Unable to resume printer %s - %s\n", PRINTERNAME(snum),
                        ippErrorString(cupsLastError())));
        }

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}

/*******************************************************************
 * CUPS printing interface definitions...
 ******************************************************************/

struct printif  cups_printif =
{
        PRINT_CUPS,
        cups_queue_get,
        cups_queue_pause,
        cups_queue_resume,
        cups_job_delete,
        cups_job_pause,
        cups_job_resume,
        cups_job_submit,
};

BOOL cups_pull_comment_location(NT_PRINTER_INFO_LEVEL_2 *printer)
{
        http_t          *http = NULL;           /* HTTP connection to server */
        ipp_t           *request = NULL,        /* IPP Request */
                        *response = NULL;       /* IPP Response */
        ipp_attribute_t *attr;          /* Current attribute */
        cups_lang_t     *language = NULL;       /* Default language */
        char            *name,          /* printer-name attribute */
                        *info,          /* printer-info attribute */
                        *location;      /* printer-location attribute */
        char            uri[HTTP_MAX_URI];
        static const char *requested[] =/* Requested attributes */
                        {
                          "printer-name",
                          "printer-info",
                          "printer-location"
                        };
        BOOL ret = False;

        DEBUG(5, ("pulling %s location\n", printer->sharename));

        /*
         * Make sure we don't ask for passwords...
         */

        cupsSetPasswordCB(cups_passwd_cb);

        /*
         * Try to connect to the server...
         */

        if ((http = cups_connect()) == NULL) {
                goto out;
        }

        request = ippNew();

        request->request.op.operation_id = IPP_GET_PRINTER_ATTRIBUTES;
        request->request.op.request_id   = 1;

        language = cupsLangDefault();

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
                     "attributes-charset", NULL, cupsLangEncoding(language));

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
                     "attributes-natural-language", NULL, language->language);

        slprintf(uri, sizeof(uri) - 1, "ipp://%s/printers/%s",
                 lp_cups_server(), printer->sharename);

        ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
                     "printer-uri", NULL, uri);

        ippAddStrings(request, IPP_TAG_OPERATION, IPP_TAG_NAME,
                      "requested-attributes",
                      (sizeof(requested) / sizeof(requested[0])),
                      NULL, requested);

        /*
         * Do the request and get back a response...
         */

        if ((response = cupsDoRequest(http, request, "/")) == NULL) {
                DEBUG(0,("Unable to get printer attributes - %s\n",
                         ippErrorString(cupsLastError())));
                goto out;
        }

        for (attr = response->attrs; attr != NULL;) {
                /*
                 * Skip leading attributes until we hit a printer...
                 */

                while (attr != NULL && attr->group_tag != IPP_TAG_PRINTER)
                        attr = attr->next;

                if (attr == NULL)
                        break;

                /*
                 * Pull the needed attributes from this printer...
                 */

                name       = NULL;
                info       = NULL;
                location   = NULL;

                while ( attr && (attr->group_tag == IPP_TAG_PRINTER) ) {
                        /* Grab the comment if we don't have one */
                        if ( (strcmp(attr->name, "printer-info") == 0)
                             && (attr->value_tag == IPP_TAG_TEXT)
                             && !strlen(printer->comment) ) 
                        {
                                DEBUG(5,("cups_pull_comment_location: Using cups comment: %s\n",
                                         attr->values[0].string.text));                         
                                pstrcpy(printer->comment,attr->values[0].string.text);
                        }

                        /* Grab the location if we don't have one */ 
                        if ( (strcmp(attr->name, "printer-location") == 0)
                             && (attr->value_tag == IPP_TAG_TEXT) 
                             && !strlen(printer->location) )
                        {
                                DEBUG(5,("cups_pull_comment_location: Using cups location: %s\n",
                                         attr->values[0].string.text));                         
                                fstrcpy(printer->location,attr->values[0].string.text);
                        }

                        attr = attr->next;
                }

                /*
                 * See if we have everything needed...
                 */

                if (name == NULL)
                        break;

        }

        ret = True;

 out:
        if (response)
                ippDelete(response);

        if (language)
                cupsLangFree(language);

        if (http)
                httpClose(http);

        return ret;
}

#else
 /* this keeps fussy compilers happy */
 void print_cups_dummy(void);
 void print_cups_dummy(void) {}
#endif /* HAVE_CUPS */

---