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Sourcecode: samba-doc-ja version File versions

vlp.c

/* 
   Unix SMB/Netbios implementation.

   Virtual lp system for printer testing

   Copyright (C) Tim Potter 2000
   
   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"

#define PRINT_TDB "/tmp/vlp.tdb"
#define PRINT_FIRSTJOB "100"

static TDB_CONTEXT *tdb;

struct vlp_job {
      fstring owner;
      int jobid;
      fstring jobname;
      int size;
      int status;
      time_t submit_time;
      int deleted;
};

/* Print usage */

static void usage(void)
{
      printf("Usage: print-test lpq|lprm|print|queuepause|queueresume|"
             "lppause|lpresume [args]\n");
}

/* Return an array of vlp jobs that is the printer queue */

static void get_job_list(char *printer, struct vlp_job **job_list, 
                   int *num_jobs)
{
      fstring keystr;
      TDB_DATA data;

      slprintf(keystr, sizeof(keystr) - 1, "LPQ/%s", printer);
      data = tdb_fetch_by_string(tdb, keystr);

      *job_list = (struct vlp_job *)data.dptr;
      *num_jobs = data.dsize / sizeof(struct vlp_job);
}

/* Store an array of vl jobs for the queue */

static void set_job_list(char *printer, struct vlp_job *job_list, 
                   int num_jobs)
{
      fstring keystr;

      slprintf(keystr, sizeof(keystr) - 1, "LPQ/%s", printer);

      tdb_store_by_string(tdb, keystr, job_list, 
                      num_jobs * sizeof(struct vlp_job));
}

/* Return the next job number for a printer */

static int next_jobnum(char *printer)
{
      fstring keystr;
      int jobnum;

      slprintf(keystr, sizeof(keystr) - 1, "JOBNUM/%s", printer);

      tdb_lock_bystring(tdb, keystr);

      jobnum = tdb_fetch_int(tdb, keystr);

      /* Create next job index if none exists */

      if (jobnum == -1) {
            jobnum = atoi(PRINT_FIRSTJOB);
      }

      jobnum++;
      tdb_store_int(tdb, keystr, jobnum);

      tdb_unlock_bystring(tdb, keystr);

      return jobnum;
}

static void set_printer_status(char *printer, int status)
{
      fstring keystr;
      int result;

      slprintf(keystr, sizeof(keystr) - 1, "STATUS/%s", printer);
      result = tdb_store_int(tdb, keystr, status);
}

static int get_printer_status(char *printer)
{
      fstring keystr;
      TDB_DATA data;

      slprintf(keystr, sizeof(keystr) - 1, "STATUS/%s", printer);

      data.dptr = keystr;
      data.dsize = strlen(keystr) + 1;

      if (!tdb_exists(tdb, data)) {
            set_printer_status(printer, LPSTAT_OK);
            return LPSTAT_OK;
      }

      return tdb_fetch_int(tdb, keystr);
}

/* Display printer queue */

static int lpq_command(int argc, char **argv)
{
      char *printer;
      struct vlp_job *job_list = NULL;
      int i, num_jobs, job_count = 0;

      if (argc != 2) {
            printf("Usage: lpq <printername>\n");
            return 1;
      }

      printer = argv[1];

      /* Display printer status */

      switch (get_printer_status(printer)) {
      case LPSTAT_OK:
            printf("enabled\n");
            break;
      case LPSTAT_STOPPED:
            printf("disabled\n");
            break;
      case LPSTAT_ERROR:
      default:
            printf("error\n");
            break;
      }

      /* Print queued documents */

      get_job_list(printer, &job_list, &num_jobs);

      for (i = 0; i < num_jobs; i++) {
            if (job_list[i].deleted) continue;
            printf("%d\t%d\t%d\t%ld\t%s\t%s\n", job_list[i].jobid,
                   job_list[i].size, 
                   (i == 0 && job_list[i].status == LPQ_QUEUED) ? 
                   LPQ_SPOOLING : job_list[i].status,
                   job_list[i].submit_time, job_list[i].owner, 
                   job_list[i].jobname);
            job_count++;
      }

      free(job_list);

      return 0;
}

/* Remove a job */

static int lprm_command(int argc, char **argv)
{
      char *printer;
      int jobid, num_jobs, i;
      struct vlp_job *job_list;

      if (argc < 3) {
            printf("Usage: lprm <printername> <jobid>\n");
            return 1;
      }

      printer = argv[1];
      jobid = atoi(argv[2]);

      get_job_list(printer, &job_list, &num_jobs);

      for (i = 0; i < num_jobs; i++) {
            if (job_list[i].jobid == jobid) {
                  job_list[i].deleted = 1;
                  set_job_list(printer, job_list, num_jobs);
                  break;
            }
      }

      return 0;
}

/* print command = print-test %p %s */

static int print_command(int argc, char **argv)
{
      char *printer;
      fstring keystr;
      struct passwd *pw;
      TDB_DATA value;
      struct vlp_job job;
      int i;

      if (argc < 3) {
            printf("Usage: print <printername> <jobname>\n");
            return 1;
      }

      printer = argv[1];

      ZERO_STRUCT(job);

      /* Create a job record */

      for (i = 2; i < argc; i++) {
            fstrcat(job.jobname, argv[i]);
            if (i < argc - 1) {
                  fstrcat(job.jobname, " ");
            }
      }

      if (!(pw = getpwuid(getuid()))) {
            return 1;
      }

      fstrcpy(job.owner, pw->pw_name);

      job.jobid = next_jobnum(printer);
      job.size = 666;
      job.submit_time = time(NULL);

      /* Store job entry in queue */

      slprintf(keystr, sizeof(keystr) - 1, "LPQ/%s", printer);
      
      value = tdb_fetch_by_string(tdb, keystr);

      if (value.dptr) {

            /* Add job to end of queue */

            value.dptr = realloc(value.dptr, value.dsize + 
                             sizeof(struct vlp_job));
            if (!value.dptr) return 1;

            memcpy(value.dptr + value.dsize, &job, sizeof(struct vlp_job));

            tdb_store_by_string(tdb, keystr, value.dptr, value.dsize +
                            sizeof(struct vlp_job));

            free(value.dptr);

      } else {
            
            /* Create new queue */

            tdb_store_by_string(tdb, keystr, &job, sizeof(struct vlp_job));
      }           

      return 0;
}

/* Pause the queue */

static int queuepause_command(int argc, char **argv)
{
      char *printer;

      if (argc != 2) {
            printf("Usage: queuepause <printername>\n");
            return 1;
      }

      printer = argv[1];
      set_printer_status(printer, LPSTAT_STOPPED);

      return 0;
}

/* Resume the queue */

static int queueresume_command(int argc, char **argv)
{
      char *printer;

      if (argc != 2) {
            printf("Usage: queueresume <printername>\n");
            return 1;
      }

      printer = argv[1];
      set_printer_status(printer, LPSTAT_OK);

      return 0;
}

/* Pause a job */

static int lppause_command(int argc, char **argv)
{
      struct vlp_job *job_list;
      char *printer;
      int jobid, num_jobs, i;

      if (argc != 3) {
            printf("Usage: lppause <printername> <jobid>\n");
            return 1;
      }

      printer = argv[1];
      jobid = atoi(argv[2]);

      get_job_list(printer, &job_list, &num_jobs);

      for (i = 0; i < num_jobs; i++) {
            if (job_list[i].jobid == jobid) {
                  job_list[i].status = LPQ_PAUSED;
                  set_job_list(printer, job_list, num_jobs);
                  return 0;
            }
      }

      return 1;
}

/* Resume a job */

static int lpresume_command(int argc, char **argv)
{
      struct vlp_job *job_list;
      char *printer;
      int jobid, num_jobs, i;

      if (argc != 3) {
            printf("Usage: lpresume <printername> <jobid>\n");
            return 1;
      }

      printer = argv[1];
      jobid = atoi(argv[2]);

      get_job_list(printer, &job_list, &num_jobs);

      for (i = 0; i < num_jobs; i++) {
            if (job_list[i].jobid == jobid) {
                  job_list[i].status = LPQ_QUEUED;
                  set_job_list(printer, job_list, num_jobs);
                  return 0;
            }
      }

      return 1;
}

int main(int argc, char **argv)
{
      /* Parameter check */

      if (argc == 1) {
            usage();
            return 1;
      }

      /* Initialise */

      if (!(tdb = tdb_open(PRINT_TDB, 0, 0, O_RDWR | O_CREAT,
                       0666))) {
            printf("%s: unable to open %s\n", argv[0], PRINT_TDB);
            return 1;
      }

      /* Ensure we are modes 666 */

      chmod(PRINT_TDB, 0666);

      /* Do commands */

      if (strcmp(argv[1], "lpq") == 0) {
            return lpq_command(argc - 1, &argv[1]);
      }

      if (strcmp(argv[1], "lprm") == 0) {
            return lprm_command(argc - 1, &argv[1]);
      }

      if (strcmp(argv[1], "print") == 0) {
            return print_command(argc - 1, &argv[1]);
      }

      if (strcmp(argv[1], "queuepause") == 0) {
            return queuepause_command(argc - 1, &argv[1]);
      }

      if (strcmp(argv[1], "queueresume") == 0) {
            return queueresume_command(argc - 1, &argv[1]);
      }

      if (strcmp(argv[1], "lppause") == 0) {
            return lppause_command(argc - 1, &argv[1]);
      }

      if (strcmp(argv[1], "lpresume") == 0) {
            return lpresume_command(argc - 1, &argv[1]);
      }

      /* Unknown command */

      printf("%s: invalid command %s\n", argv[0], argv[1]);
      return 1;
}

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