在QNX上配置和使用CUPS打印服务

本文介绍如何在QNX系统上配置和使用CUPS打印服务，包括安装CUPS、配置打印机和打印作业。使用CUPS提供的API，实现打印功能。

#include <cups/cups.h>
#include <cups/ppd.h>

void print_file(char * filename, char * printername)
{
    int job_id;
    cups_option_t *options = NULL;

    /* 初始化CUPS */
    cupsInitialize(NULL, NULL, 0);

    /* 查找打印机 */
    cups_dest_t *dest = cupsGetDest(printername, NULL, NULL);

    /* 加载PPD文件 */
    ppd_file_t *ppd = ppdOpenFile(dest->ppd);

    /* 创建打印作业 */
    job_id = cupsCreateJob(dest->printer, filename, options);

    /* 设置打印选项 */
    int num_options = 0;
    cups_option_t *media_option = cupsFindDestOption(dest, "media");
    if (media_option != NULL) {
        options = cupsAddOption(options, media_option->name, media_option->value, &num_options);
    }

    /* 打印文件 */
    FILE *fp = fopen(filename, "rb");
    if (fp != NULL) {
        cupsStartDocument(dest->name, job_id, filename, NULL, CUPS_FORMAT_AUTO, 1);
        cupsWriteRequestData(fp, dest->printer, job_id);
        cupsFinishDocument(dest->name);
        fclose(fp);
    }

    /* 关闭CUPS连接 */
    cupsFreeDests(1, dest);
    cupsFreeOptions(num_options, options);
    ppdClose(ppd);
    cupsTerminate();
}

免责申明：文章和图片全部来源于公开网络，如有侵权，请通知删除 server@dude6.com