prout

smaller "lp" command
git clone git://git.2f30.org/prout
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prout.c (4100B)

      1 /*
      2  *            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
      3  *                    Version 2, December 2004
      4  *
      5  * Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
      6  *
      7  * Everyone is permitted to copy and distribute verbatim or modified
      8  * copies of this license document, and changing it is allowed as long
      9  * as the name is changed.
     10  *
     11  *            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
     12  *   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
     13  *
     14  *  0. You just DO WHAT THE FUCK YOU WANT TO.
     15  *
     16  */
     17 
     18 #include <stdio.h>
     19 #include <stdbool.h>
     20 #include <cups/cups.h>
     21 
     22 /* Usage function */
     23 static void
     24 usage()
     25 {
     26     printf("usage: prout [-h] <file>\n");
     27 }
     28 
     29 /* Return the file name if the file is opennable otherwise exit */
     30 static char*
     31 check_file(char *file)
     32 {
     33     FILE *f;
     34 
     35     /* Try to open given file */
     36     f = fopen(file, "r");
     37 
     38     if (!f) {
     39         fprintf(stderr, "Cannot open the given file\n");
     40         exit(1);
     41     }
     42 
     43     /* Close file again */
     44     fclose(f);
     45 
     46     return file;
     47 }
     48 
     49 /* Return a pointer to the destination if reachable otherwise exit */
     50 static
     51 cups_dest_t* check_dest()
     52 {
     53     int num_dests;
     54     cups_dest_t *dests, *dest;
     55 
     56     /* Get the number of destination configured */
     57     num_dests = cupsGetDests(&dests);
     58 
     59     /* Exit if there is no default printer configured */
     60     if (num_dests < 1) {
     61         fprintf(stderr, "No default printer configured\n");
     62         exit(1);
     63     }
     64 
     65     /* Get the default destination from all destinations */
     66     dest = cupsGetDest(NULL, NULL, 1, dests);
     67 
     68     /* No need to go on if we can't reach the printer */
     69     if (!dest) {
     70         fprintf(stderr, "Cannot get a pointer to the default destination");
     71         exit(1);
     72     }
     73 
     74     return (dest);
     75 }
     76 
     77 /* Return the printed file's job ID */
     78 static int
     79 print(const char* file, cups_dest_t *dest)
     80 {
     81     int job_id = -1;
     82 
     83     /* Create a new job to print the document */
     84     job_id = cupsPrintFile (dest->name, file, "pp file", 0, NULL);
     85 
     86     fprintf(stdout, "printing %s (%d) to %s.\n", file, job_id, dest->name);
     87 
     88     return job_id;
     89 }
     90 
     91 /* Blocking function: Wait util the job is completed, or an error is thrown */
     92 static void
     93 check_job(cups_dest_t *dest, int job_id)
     94 {
     95     int i, num_jobs;
     96 
     97     cups_job_t *jobs;
     98 
     99     ipp_jstate_t state = IPP_JOB_PENDING;
    100 
    101     /* get total number of jobs */
    102     num_jobs = cupsGetJobs(&jobs, dest->name, 1, CUPS_WHICHJOBS_ALL);
    103 
    104     /* Find my job ID */
    105     for (i = 0; i < num_jobs; i++) {
    106         if (jobs[i].id == job_id) {
    107             state = jobs[i].state;
    108             break;
    109         }
    110     }
    111 
    112     /* Free the job array */
    113     cupsFreeJobs(num_jobs, jobs);
    114 
    115     switch (state) {
    116         case IPP_JOB_PENDING :
    117             printf("job %d pending.\n", job_id);
    118             break;
    119         case IPP_JOB_HELD :
    120             printf("job %d held.\n", job_id);
    121             break;
    122         case IPP_JOB_PROCESSING :
    123             printf("job %d processing.\n", job_id);
    124             break;
    125         case IPP_JOB_STOPPED :
    126             printf("job %d stopped.\n", job_id);
    127             break;
    128         case IPP_JOB_CANCELED :
    129             printf("job %d canceled.\n", job_id);
    130             break;
    131         case IPP_JOB_ABORTED :
    132             printf("job %d aborted.\n", job_id);
    133             break;
    134         case IPP_JOB_COMPLETED :
    135             printf("job %d completed.\n", job_id);
    136             break;
    137     }
    138 }
    139 
    140 int
    141 main(int argc, char **argv)
    142 {
    143     int i = 0;
    144     int job_id = -1;
    145 
    146     char *file;
    147 
    148     cups_dest_t *dest;
    149 
    150     /* check given arguments */
    151     if (argc < 2) {
    152         usage();
    153         exit(1);
    154     }
    155 
    156     for (i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
    157         switch (argv[i][1]) {
    158             case 'h':
    159                 usage();
    160                 exit(0);
    161             default:
    162                 usage();
    163                 exit(1);
    164         }
    165     }
    166 
    167     /* check whether the file is correct */
    168     file = check_file(argv[1]);
    169 
    170     /* is the default printer set up? Can we use it? */
    171     dest = check_dest();
    172 
    173     /* print the file */
    174     job_id = print(file, dest);
    175 
    176     /* did it print successfully? */
    177     check_job(dest, job_id);
    178 
    179     return 0;
    180 }