Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Linux¿éÉ豸Çý¶¯(2) ¿éÇý¶¯ÖÐÏà¹ØÏà¹ØÄ£¿éÄ£°å


1.¿éÉ豸Çý¶¯µÄÄ£¿é¼ÓÔØÓëÐ¶ÔØ
1)¿éÉ豸Çý¶¯µÄÄ£¿é¼ÓÔØÍê³ÉµÄ¹¤×÷ÈçÏÂ:
Ø ·ÖÅä,³õʼ»¯ÇëÇó¶ÓÁÐ,°ó¶¨ÇëÇó¶ÓÁкÍÇëÇóº¯Êý
Ø ·ÖÅä,³õʼ»¯gendisk,¸øgendiskµÄmajor,fops,queueµÈ³ÉÔ±¸³Öµ,×îºóÌí¼Ógendisk.
Ø ×¢²á¿éÉ豸Çý¶¯.
´úÂë1:ʹÓÃblk_alloc_queueº¯ÊýÍê³É¿éÉ豸Çý¶¯µÄÄ£¿é¼ÓÔØÄ£°å
    static int __init xxx_init(void){
        //·ÖÅägendisk
        xxx_disks = alloc_disk(1);
        if(!xxx_disks){
            goto out;
        }
        //¿éÉ豸Çý¶¯×¢²á
        if(register_blkdev(xxx_MAJOR, "xxx"){
            err = -EIO;
            goto out;
        }
        //"ÇëÇó¶ÓÁÐ"·ÖÅä
        xxx_queue = blk_alloc_queue(GFP_KERNEL);
        if(!xxx_queue){
            goto out_queue;
        }
        blk_queue_make_request(xxx_queue, &xxx_make_request);//°ó¶¨"ÖÆÔìÇëÇó"º¯Êý
        blk_queue_hardsect_size(xxx_queue,xxx_blocksize);//¸æÖªÄÚºËÓ²¼þÉÈÇø³ß´ç
        //gendisk³õʼ»¯
        xxx_disks->major = xxx_MAJOR;
        xxx_disks->first_minor = 0


Ïà¹ØÎĵµ£º

LinuxÄÚºËÈëÃÅ£¨Æß£©—— ±ØÒªµÄ±àÒë֪ʶ

ËùÓеÄÄں˴úÂ룬»ù±¾¶¼°üº¬ÁËinclude/linux/compile.hÕâ¸öÎļþ£¬ËùÒÔËüÊÇ»ù´¡£¬º­¸ÇÁË·ÖÎöÄÚºËËùÐèÒªµÄһЩÁбàÒë֪ʶ£¬±¾²©¾Í·ÖÎö·ÖÎöÕâ¸öÎļþÀïµÄ´úÂ룺
#ifndef __LINUX_COMPILER_H
#define __LINUX_COMPILER_H
#ifndef __ASSEMBLY__
Ê×ÏÈÓ¡ÈëÑÛÁ±µÄÊǶÔ__ASSEMBLY__Õâ¸öºêµÄÅжϣ¬Õâ¸ö±äÁ¿Êµ¼ÊÊÇÔÚ±àÒë»ã±à´úÂëµÄÊ ......

Linux/Unix Êý¾Ý¿â°²×°ÅäÖÃ

      ¸ù¾Ý¹¤×÷»·¾³µÄÐèÇó£¬ÐèÒªÕÆÎÕLinux/Unix»·¾³Ï½øÐÐÈí¼þ°²×°Î¬»¤ÒÔ¼°Ïà¹ØÅäÖõȼ¼ÄÜ¡£ÕâÀォÎÒµÄʹÓÃÐĵüǼÏÂÀ´¸ú´ó¼Ò·ÖÏíһϡ£ÒÔ°²×°Êý¾Ý¿âΪÀý½øÐн²½â(×¢£ºÒÔÉϰ²×°¾ùÒÔÔ´´úÂ뷽ʽ½øÐа²×°)¡£ÒÔÏÂʹÓõÄLinuxϵͳÊǰ²×°ÔÚÐéÄâ»úÉϵ쬲¢ÇÒlinuxϵͳÊÇlinux enterprise 5¡£
 &nb ......

linuxʵÓù¤¾ß

»ù±¾ÊµÓù¤¾ß£º
ls  ÏÔʾÎļþÃû(list)
cat  ÏÔʾÎı¾ÎļþÄÚÈÝ
rm [-i]  ɾ³ýÎļþ(remove),-i´ò¿ªÑ¡Ïî
less/more  ·ÖÆÁÏÔʾÎļþ
hostname  ÏÔʾϵͳÃû
Îļþ²Ù×÷£º
cp SOURCEFILE DESTINATIONFILE  ¸´ÖÆÎļþcopy
mv OLDNAME NEWNAME  ¸ü¸ÄÎļþÃû(move)
lpr [-p] FILEN ......

linuxÏÂffmpeg ÊÖ»úÊÓÆµ×ª»»×ܽá

ffmpeg°æ±¾:0.5.1 flv -> mp4  ->3gp
#½ØÍ¼£º
./ffmpeg -i ÊÓÆµÎļþ -y -ss ½ØÍ¼Ê±¼ä -vframes 1 -f image2 -s 128x96 Ä¿±êÎļþÃû;
#Éú³ÉÔ¤ÀÀ°æ£º
./ffmpeg -i out.3gp -ss 00:00:00 -t 00:00:10 -s qcif -acodec copy -vcodec copy -y preview.3gp
#ת»»16:9 flvÊÓÆµµ½ 4:3µÄmp4ÊÓÆµ
ffmpeg -i src. ......

Àí½âLinuxµÄÆô¶¯¹ý³Ì ºÃºÃѧϰѽ


 
    ´Ó°´ÏÂPCµçÔ´£¬µ½³öÏÖÊìϤµÄbashÌáʾ·û"$"»ò½øÈëÆ¯ÁÁµÄKDE/GNOME×ÀÃæ£¬ÕâÊÇÎÒÃÇÿÌ쿪»ú±Ø¾­µÄ¹ý³Ì¡£ÄÇô£¬ÔÚÕâ¶Ì¶Ì¼¸Ê®ÃëÄÚ£¬LinuxÊÇÔõÑùÆô¶¯µÄÄØ£¿±¾ÎĽéÉÜLinuxµÄÆô¶¯¹ý³Ì¡£
    ƽ̨£ºPC»ú, Ubuntu 5.10
»ù´¡ÖªÊ¶
BIOS (Basic I/O System£¬»ù±¾ÊäÈë/Êä³öϵͳ)
 & ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ