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

Linux»·¾³ÏÂÓÃcÓïÑÔдµÄ²¥·ÅwavÎļþµÄС³ÌÐò

#include <unistd.h>
#include <fcntl.h>
#include
<sys/types.h>
#include <sys/ioctl.h>
#include
<stdlib.h>
#include <stdio.h>
#include
<linux/soundcard.h>
/* ÏÂÃæµÄÈý¸ö²ÎÊýÊǸú¾ßÌåÎļþÏà¹ØµÄ£¬ÎļþʲôÑù£¬¾ÍÒªÉèÖóÉʲôÑù */
#define RATE 11025  
#define SIZE 16    
#define CHANNELS
2  // 1±íʾµ¥ÉùµÀ£¬2ΪÁ¢ÌåÉù
/* ................ */
unsigned char
buf[RATE*SIZE/8]; //bufÀïÃæÕýºÃ·ÅÒ»ÃëÖÓµÄÒôƵ£¬ÏÂÃæµÄ¼ÆÊ±»¹ÒªÓÃ
int main()
{
    int fd;
    int wavfd; //wavÎļþµÄÃèÊö·û
    int arg;        /* ..ioctl..... */
    int status;   /*
........ */
                /* ...... */
    fd = open("/dev/dsp",
O_RDWR);      
    if (fd < 0) {
        printf("open of /dev/dsp failed");
       
exit(1);
}
    wavfd = open("a.wav",O_RDONLY);
    if (wavfd
< 0) {
        printf("open of wav failed");
        exit(1);
 
}
 
/* .......... */
    arg = SIZE;
    status = ioctl(fd,
SOUND_PCM_WRITE_BITS, &arg);
    if (status == -1)
        
perror("SOUND_PCM_WRITE_BITS ioctl failed");
    if (arg != SIZE)
        
perror("unable to set sample size");
 
/* .......... */
    arg = CHANNELS;
    status = ioctl(fd,
SOUND_PCM_WRITE_CHANNELS, &arg);
    if (status == -1)
 &nb


Ïà¹ØÎĵµ£º

Àí½âlinux trÃüÁî

1. tr ÃüÁîµÄ¹¦ÄÜ
trÃüÃûÊǼò»¯Á˵ÄsedÃüÁî¡£ÆäÖ÷ÒªµÄ¹¦ÄܰüÀ¨£º
a. ÓÃÒ»¸ö×Ö·ûÀ´Ìæ»»ÁíÍâÒ»¸ö×Ö·û¡£
b. ɾ³ý×Ö·û´®ÖеÄÖ¸¶¨×Ó´®¡£
c. ºÏ²¢×Ö·û´®ÖÐÖØ¸´´®¡£
2. ³£¼ûµÄÃüÁî¸ñʽ£º
tr -c -d -s ["string1_to_translate_from"] ["string2_to_translate_to"] < input-file
-c ÓÃ×Ö·û´®1ÖÐ×Ö·û¼¯µÄ²¹¼¯Ìæ»»´Ë×Ö·û¼¯£¬ ......

LinuxÄÚ´æ¹ÜÀí(zt)


Linux
ÄÚ´æ¹ÜÀí
ÕªÒª
£º±¾ÕÂÊ×ÏÈÒÔÓ¦ÓóÌÐò¿ª·¢ÕߵĽǶÈÉóÊÓ
Linux
µÄ½ø³ÌÄÚ´æ¹ÜÀí£¬ÔÚ´Ë»ù´¡ÉÏÖð²½ÉîÈëµ½ÄÚºËÖÐÌÖÂÛϵͳÎïÀíÄÚ´æ¹ÜÀíºÍÄÚºËÄÚ´æµÄʹÓ÷½·¨¡£Á¦Çó´ÓÍâµ½ÄÚ¡¢Ë®µ½Çþ³ÉµØÒýµ¼ÍøÓÑ·ÖÎö
Linux
µÄÄÚ´æ¹ÜÀíÓëʹÓá£ÔÚ±¾ÕÂ×îºó£¬ÎÒÃǸø³öÒ»¸öÄÚ´æÓ³ÉäµÄʵÀý£¬°ïÖúÍøÓÑÃÇÀí½â
ÄÚºËÄÚ´æ¹ÜÀíÓëÓû§ÄÚ´æ¹ÜÀíÖ ......

¹ØÓÚlinux/unixÖÐSUID /SGID½âÎö

ÓÉÓÚÓû§ÔÚUNIXϾ­³£»áÓöµ½SUID¡¢SGIDµÄ¸ÅÄ¶øÇÒSUIDºÍSGIDÉæ¼°µ½ÏµÍ³°²È«£¬ËùÒÔÓû§Ò²±È½Ï¹ØÐÄÕâ¸öÎÊÌâ¡£
Ò»¡¢ UNIXϹØÓÚÎļþȨÏ޵ıíʾ·½·¨ºÍ½âÎö

SUID ÊÇ Set User ID, SGID ÊÇ Set Group IDµÄÒâ˼¡£
UNIXÏ¿ÉÒÔÓÃls -l ÃüÁîÀ´¿´µ½ÎļþµÄȨÏÞ¡£ÓÃlsÃüÁîËùµÃµ½µÄ±íʾ·¨µÄ¸ñʽÊÇÀàËÆÕâÑùµÄ£º-rwxr-xr-x ¡£ÏÂÃæ ......

Linux + JDK + Tomcat + MySQL + JDBC °²×°ÊÖ¼Ç

Linux + JDK + Tomcat + MySQL + JDBC °²×°ÊÖ¼Ç
Ò»¡¢Red Hat Linux
1.·ÖÇø
           
                        | swap  & ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ