C++博客-开心就好-文章分类-linux develophttp://www.cppblog.com/shaovie/category/2727.html做最好的自己zh-cnTue, 27 May 2008 21:01:22 GMTTue, 27 May 2008 21:01:22 GMT60我最编写的最成功的一个makefilehttp://www.cppblog.com/shaovie/articles/15836.html崔少伟崔少伟Fri, 01 Dec 2006 02:49:00 GMThttp://www.cppblog.com/shaovie/articles/15836.htmlhttp://www.cppblog.com/shaovie/comments/15836.htmlhttp://www.cppblog.com/shaovie/articles/15836.html#Feedback0http://www.cppblog.com/shaovie/comments/commentRss/15836.htmlhttp://www.cppblog.com/shaovie/services/trackbacks/15836.html #  Copyright (c) 2006 HXHT, Inc.  All rights reserved.
#
#compiler and linker
CXX   =  g ++
CC    =  gcc
LINKER  =  g ++
MAKE    =  make

 # control version save-dir
ifdef HXHT_RELEASE
BIN_DIR  =   ./ release
 else
BIN_DIR  =   ./ debug
endif

 # source code dir
VPATH  :=   ./ src

 # target
TARGET  =  $(BIN_DIR) / HikVideoSvrHC

 # compile macro
COMP_MACRO  =   - D_REENTRANT  - D__USE_POSIX  - D__linux__  - DIP_DEBUG

 # compile flags
CCFLAGS  +=  $(COMP_MACRO)  - g  - Wall

 # libs
LIB_DIR   =   - L ./ hc4000_sdk  - L ./ g729decoder
SYS_LIBS  =   - lpthread  - ldl  - lstdc ++   - lm  - lcrypt
PROJECT_LIBS  =   - lACE  - lds40xxsdk  - lg729decoder
LIBS  =  $(SYS_LIBS) $(LIB_DIR) $(PROJECT_LIBS)

 # optimization
CCFLAGS  +=   - O2

 #  EACH DIRECTORY WITH HEADERS MUST BE APPENDED IN THIS MANNER TO THE CCFLAGS
CCFLAGS  +=   - I .
CCFLAGS  +=   - I$(ACE_ROOT)
 # CCFLAGS += -I./src
# EACH DIRECTORY WITH A STATIC LIBRARY MUST BE APPENDED IN THIS MANNER TO THE LINKOPTS
CXXFLAGS  :=  $(CCFLAGS)
CFLAGS  =

CPPFILES  =       AlarmHandler . cpp    \
                AlarmInGetPolicyReq . cpp    \
                AlarmInSetPolicyReq . cpp    \
                AlarmOutStatusReq . cpp    \
                
                
                Writer . cpp

CFILES  =

OBJ_DIR  =   ./ obj /

OBJS  =  $(addprefix $(OBJ_DIR) ,  $(notdir $(CPPFILES :%. cpp =%. o)))

all :  $(TARGET)

$(TARGET) :  $(OBJS)
        $(LINKER)  - o $@ $(OBJS) $(CXXFLAGS) $(LIBS)

 # $(OBJS):$($(notdir $@):%.o=%.cpp)
$(OBJ_DIR) %. o :%. cpp
        $(CXX) $(CXXFLAGS)  - c $ ^   - o $@

$(OBJ_DIR) %. o :%. c
        $(CC) $(CCFLAGS)  - c $ ^   - o $@
check :
        ldd  - r $(NAME)
clean :
         - rm  - f $(OBJS)
cleanall :  clean all
         - rm  - f $(TARGET)
 . PHONY : all check clean cleanall

崔少伟 2006-12-01 10:49 发表评论
]]>GNU Make自动变量一览http://www.cppblog.com/shaovie/articles/15829.html崔少伟崔少伟Fri, 01 Dec 2006 00:24:00 GMThttp://www.cppblog.com/shaovie/articles/15829.htmlhttp://www.cppblog.com/shaovie/comments/15829.htmlhttp://www.cppblog.com/shaovie/articles/15829.html#Feedback0http://www.cppblog.com/shaovie/comments/commentRss/15829.htmlhttp://www.cppblog.com/shaovie/services/trackbacks/15829.html

GNU 自动变量一览表 

名称  含义
$@ 规则目标的文件名.如果目标是档案文件的一个成员,"$@"就是档案文件的名称
$% 当目标是档案文件的一个成员时,"$%"是该成员的名称.否则"$%"为空
$< 第一个依赖文件的名称
$? 以空格隔开的比目标新的所有依赖文件名.若依赖文件是档案文件的成员,只使用成员的名称
$^ 以空格隔开的所有依赖文件名.若依赖文件是档案文件的成员,只使用成员名称.无论一个依赖文件出现过多少次,"$^"值中只包含其名称的一个拷贝
$+ 与"$^"相似,但多次列出的依赖文件按照它们在构造文件中出现的顺序复制.这对于链接命令中以特定顺序重复出现的库文件名有作用
$* 隐含规则匹配的词干.若目标为"dir/a.foo.b"且目标模式为"a.%.b",则词干为"dir/foo".对静态模式规则,词干是文件名中与目标模式中"%"匹配的部分.应避免在隐含规则或静态模式规则之外使用"$*"
$(@D) 删除结尾斜杠的目标文件名的目录部分.若"$@"的值为"dir/foo.o",则"$(@D)"为"dir".若"$@"不包含斜杠,则"$(@D)"为"."
$(@F) 目标文件名中目录下的文件部分.如果"$@"的值为"dir/foo.o",那么"$(@F)"为"foo.o".它等同于"$(notdir $@)"
$(*D) 词干中的目录部分,例如上例中的"dir"
$(*F) 词干中的目录下文件部分,例如上例中的"foo"
$(%D) 目标档案文件成员的目录部分.仅对形为"archive(member)"的档案文件成员目标有意义,且仅在member包含目录名时有用
$(%F) 目标档案文件成员中的目录下文件部分
$(<D) 第一个依赖文件的目录部分
$(<F) 第一个依赖文件的目录下文件部分
$(^D) 所有依赖文件的目录部分
$(^F) 所有依赖文件的目录下文件部分
$(?D) 比目标新的所有依赖文件的目录部分
$(?F) 比目标新的所有依赖文件的目录部分

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崔少伟 2006-12-01 08:24 发表评论
]]>linux系统ioctl使用示例(转)http://www.cppblog.com/shaovie/articles/15171.html崔少伟崔少伟Wed, 15 Nov 2006 03:03:00 GMThttp://www.cppblog.com/shaovie/articles/15171.htmlhttp://www.cppblog.com/shaovie/comments/15171.htmlhttp://www.cppblog.com/shaovie/articles/15171.html#Feedback0http://www.cppblog.com/shaovie/comments/commentRss/15171.htmlhttp://www.cppblog.com/shaovie/services/trackbacks/15171.htmlyou can use and modify them but NO WARRANTY.
  Contact with me : kf_701@21cn.com

程序1：检测接口的 inet_addr,netmask,broad_addr
程序2：检查接口的物理连接是否正常
程序3：更简单一点测试物理连接
程序4：调节音量

***************************程序1****************************************
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <sys/ioctl.h>
#include <net/if.h>

static void usage(){
        printf("usage : ipconfig interface ");
        exit(0);
}

int main(int argc,char **argv)
{
        struct sockaddr_in *addr;
        struct ifreq ifr;
        char *name,*address;
        int sockfd;

        if(argc != 2)
                usage();
        else
                name = argv[1];

        sockfd = socket(AF_INET,SOCK_DGRAM,0);
        strncpy(ifr.ifr_name,name,IFNAMSIZ-1);

        if(ioctl(sockfd,SIOCGIFADDR,&ifr) == -1)
                perror("ioctl error"),exit(1);
        addr = (struct sockaddr_in *)&(ifr.ifr_addr);
        address = inet_ntoa(addr->sin_addr);
        printf("inet addr: %s ",address);

        if(ioctl(sockfd,SIOCGIFBRDADDR,&ifr) == -1)
                perror("ioctl error"),exit(1);
        addr = (struct sockaddr_in *)&ifr.ifr_broadaddr;
        address = inet_ntoa(addr->sin_addr);
        printf("broad addr: %s ",address);

        if(ioctl(sockfd,SIOCGIFNETMASK,&ifr) == -1)
                perror("ioctl error"),exit(1);
        addr = (struct sockaddr_in *)&ifr.ifr_addr;
        address = inet_ntoa(addr->sin_addr);
        printf("inet mask: %s ",address);

        printf(" ");
        exit(0);
}

******************************** 程序2*****************************************************
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <stdlib.h>
#include <unistd.h>

typedef unsigned short u16;
typedef unsigned int u32;
typedef unsigned char u8;

#include <linux/ethtool.h>
#include <linux/sockios.h>

int detect_mii(int skfd, char *ifname)
{
        struct ifreq ifr;
        u16 *data, mii_val;
        unsigned phy_id;

        /* Get the vitals from the interface. */
        strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
        if (ioctl(skfd, SIOCGMIIPHY, &ifr) < 0)
        {
                fprintf(stderr, "SIOCGMIIPHY on %s failed: %s ", ifname,
                strerror(errno));
                (void) close(skfd);
                return 2;
        }

        data = (u16 *)(&ifr.ifr_data);
        phy_id = data[0];
        data[1] = 1;


        if (ioctl(skfd, SIOCGMIIREG, &ifr) < 0)
        {
                fprintf(stderr, "SIOCGMIIREG on %s failed: %s ", ifr.ifr_name,
                strerror(errno));
                return 2;
        }

        mii_val = data[3];

        return(((mii_val & 0x0016) == 0x0004) ? 0 : 1);
}

int detect_ethtool(int skfd, char *ifname)
{
        struct ifreq ifr;
        struct ethtool_value edata;

        memset(&ifr, 0, sizeof(ifr));
        edata.cmd = ETHTOOL_GLINK;

        strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)-1);
        ifr.ifr_data = (char *) &edata;

        if (ioctl(skfd, SIOCETHTOOL, &ifr) == -1)
        {
                printf("ETHTOOL_GLINK failed: %s ", strerror(errno));
                return 2;
        }

        return (edata.data ? 0 : 1);
}

int main(int argc, char **argv)
{
        int skfd = -1;
        char *ifname;
        int retval;

        if( argv[1] )
                ifname = argv[1];
        else
                ifname = "eth0";

        /* Open a socket. */
        if (( skfd = socket( AF_INET, SOCK_DGRAM, 0 ) ) < 0 )
        {
                printf("socket error ");
                exit(-1);
        }

        retval = detect_ethtool(skfd, ifname);

        if (retval == 2)
                retval = detect_mii(skfd, ifname);


        close(skfd);

        if (retval == 2)
                printf("Could not determine status ");

        if (retval == 1)
                printf("Link down ");

        if (retval == 0)
                printf("Link up ");

        return retval;
}

*******************************程序3*****************************************************
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <net/if.h>
#include <linux/sockios.h>
#include <sys/ioctl.h>
#define LINKTEST_GLINK 0x0000000a

struct linktest_value {
        unsigned int    cmd;
        unsigned int    data;
};

static
void
usage(const char * pname)
{
        fprintf(stderr, "usage: %s <device> ", pname);
        fprintf(stderr, "returns: ");
        fprintf(stderr, " 0: link detected ");
        fprintf(stderr, " %d: %s ", ENODEV, strerror(ENODEV));
        fprintf(stderr, " %d: %s ", ENONET, strerror(ENONET));
        fprintf(stderr, " %d: %s ", EOPNOTSUPP, strerror(EOPNOTSUPP));
        exit(EXIT_FAILURE);
}

static
int
linktest(const char * devname)
{
        struct ifreq ifr;
        struct linktest_value edata;
        int fd;

        /* setup our control structures. */
        memset(&ifr, 0, sizeof(ifr));
        strcpy(ifr.ifr_name, devname);

        /* open control socket. */
        fd=socket(AF_INET, SOCK_DGRAM, 0);
        if(fd < 0 ) {
                return -ECOMM;
        }

        errno=0;
        edata.cmd = LINKTEST_GLINK;
        ifr.ifr_data = (caddr_t)&edata;

        if(!ioctl(fd, SIOCETHTOOL, &ifr)) {
                if(edata.data) {
                        fprintf(stdout, "link detected on %s ", devname);
                        return 0;
                } else {
                        errno=ENONET;
                }
        }

        perror("linktest");
        return errno;
}

int
main(int argc, char *argv[])
{
        if(argc != 2) {
                usage(argv[0]);
        }
        return linktest(argv[1]);
}

*************************************程序4*********************************************************
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <stdio.h>
#include <unistd.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>

#define  BASE_VALUE 257

int main(int argc,char *argv[])
{
        int mixer_fd=0;
        char *names[SOUND_MIXER_NRDEVICES]=SOUND_DEVICE_LABELS;
        int value,i;

        printf(" usage:%s dev_no.[0..24] value[0..100] ",argv[0]);
        printf("eg. %s 0 100 ",argv[0]);
        printf("    will change the volume to MAX volume. ");
        printf("The dev_no. are as below: ");
        for (i=0;i<SOUND_MIXER_NRDEVICES;i++){
                if (i%3==0) printf(" ");
                printf("%s:%d ",names[i],i);
        }
        printf(" ");

        if (argc<3)
                exit(1);

        if ((mixer_fd = open("/dev/mixer",O_RDWR))){
                printf("Mixer opened successfully,working... ");
                value=BASE_VALUE*atoi(argv[2]);

                if (ioctl(mixer_fd,MIXER_WRITE(atoi(argv[1])),&value)==0)
                printf("successfully.....");
                else    printf("unsuccessfully.....");
                printf("done. ");
         }else
                printf("can't open /dev/mixer error.... ");

        exit(0);
}

**********************************************************************************************

崔少伟 2006-11-15 11:03 发表评论
]]>文件输出流引起的小问题http://www.cppblog.com/shaovie/articles/14428.html崔少伟崔少伟Tue, 31 Oct 2006 09:56:00 GMThttp://www.cppblog.com/shaovie/articles/14428.htmlhttp://www.cppblog.com/shaovie/comments/14428.htmlhttp://www.cppblog.com/shaovie/articles/14428.html#Feedback0http://www.cppblog.com/shaovie/comments/commentRss/14428.htmlhttp://www.cppblog.com/shaovie/services/trackbacks/14428.html#include <stdio.h>
#include <string.h>
#include <string>
#include <sys/types.h>
#include <signal.h>
#include <unistd.h>
#include <sys/wait.h>

class Base
{
        public:
                static pid_t ppid_c;
                static void   setppid(pid_t j){ ppid_c = j;}
                static pid_t getppid_c (){ return ppid_c;}
};
pid_t Base::ppid_c = 0;
void test (int signo)
{
        printf ("before sleep\n");
        sleep (3);
        printf ("after sleep 3 sec\n");
}
int main ()
{
        pid_t pid = fork ();
        if (pid > 0)
        {
                signal (SIGUSR1, test);
                printf ("ppid = %d", getpid ());
                fflush (stdout); /////////////////////////////////////////////////////////问题所在
                signal (SIGINT, SIG_IGN);
                int st;
                waitpid (pid, &st, 0);
        }else
                if (pid == 0)
                {
                        setsid ();
                        sleep (10);
                        Base::setppid (getppid ());
                        printf ("chiled sleep over\n");
                        printf ("child ppid = %d", Base::getppid_c ());
                        kill (Base::getppid_c (), SIGUSR1);
                        printf ("child program");
                        exit (0);
                }
}
在加上注释行以前..父进程居然不打印..郁闷了半天..最后组长想到这个问题printf ("ppid = %d", getpid ());
里边没有加\n 所以输出流先缓存起来.没有直接输出, 得手动清理



崔少伟 2006-10-31 17:56 发表评论
]]>linuxGDB下动态链接库的调试http://www.cppblog.com/shaovie/articles/13182.html崔少伟崔少伟Sat, 30 Sep 2006 07:25:00 GMThttp://www.cppblog.com/shaovie/articles/13182.htmlhttp://www.cppblog.com/shaovie/comments/13182.htmlhttp://www.cppblog.com/shaovie/articles/13182.html#Feedback0http://www.cppblog.com/shaovie/comments/commentRss/13182.htmlhttp://www.cppblog.com/shaovie/services/trackbacks/13182.html

gdb) file <你的exe>
(gdb) load <你的so>                #这条应该是可选的

(gdb) dir <so'dir>
(gdb) sharedlibrary <你的so>
(gdb) breakpoint <你的so中somewhere>
(gdb) run
load 是将动态库加载入内存。
sharedlibrary是将动态库的符号读入gdb，为了你能找到变量和函数名。
它们本身是没有明显的动作，但后面当你直接设置断点到动态库的函数（或行号）时，你就可以成功了。在此之前要记得用dir将动态库的源码也加入搜索路径。



崔少伟 2006-09-30 15:25 发表评论
]]>