linux 下远程执行命令 socket实现
服务端：
/************************************************************************* > File Name: srv.c > Author: zhoulin > Mail: [email protected] > Created Time: Sat 02 Jan 2016 04:39:53 PM EST ************************************************************************/ #include <stdio.h> #include <unistd.h> #include <string.h> #include <stdlib.h> #include <fcntl.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #define size 4096 #define port 6000 #define backlog 5 int main(void) { int sk; int rsk; struct sockaddr_in server; struct sockaddr_in client; char send_buf[size]; char recv_buf[size]; //open a socket sk= socket(AF_INET,SOCK_STREAM,0); //建立socket if(sk == -1) { perror("socket"); return -1; } //seting server addr memset((char *)&server,0,sizeof(server)); server.sin_family = AF_INET; server.sin_addr.s_addr = htonl(INADDR_ANY); server.sin_port = port; if(bind(sk, (struct sockaddr *)&server, sizeof(server)) == -1) { //绑定到指定的port上 perror("bind"); return -1; } if(listen(sk, backlog) == -1) { //监听服务端的端口 perror("listen"); return -1; } int len=sizeof(client); printf("****************listen socket****************\n"); while(1) { if((rsk = accept(sk,(struct sockaddr *)&client, &len)) < 0){ //循环监听 perror("accept"); return -1; } fprintf(stdout,"Conencted from %s\n", inet_ntoa(client.sin_addr)); //输出连接到服务端的IP地址 printf("TCP>"); memset(send_buf,'\0',size); fgets(send_buf, size, stdin); //输入命令 size_t slen=send(rsk, send_buf, strlen(send_buf), 0); //发送指正字节到客户端 size_t rlen=recv(rsk, recv_buf, size, 0); //接受来自客户端的信息 if(strncmp(recv_buf,"quit",4) == 0){ //如果收到的是是quit,则退出 break; } if(rlen > 0 ) { //重置接受信息的缓冲区 fprintf(stdout,"%s",recv_buf); memset(recv_buf,'\0',size); } } return 0; }
客户端 代码如下
/************************************************************************* > File Name: cli.c > Author: zhoulin > Mail: [email protected] > Created Time: Sat 02 Jan 2016 06:37:32 PM EST ************************************************************************/ #include <stdio.h> #include <unistd.h> #include <time.h> #include <string.h> #include <stdlib.h> #include <fcntl.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #define size 4096 #define port 6000 #define sleep_time 1 int exec_command() { int exec_flag=0; char log[2048]={'\0'}; time_t c_now; struct tm *c_tm_now; time(&c_now); c_tm_now=localtime(&c_now); char *wday[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"}; sprintf(log,"[%d-%d-%d %s %d:%d:%d] : ", (1900+c_tm_now->tm_year), (1+c_tm_now->tm_mon),\ c_tm_now->tm_mday,wday[c_tm_now->tm_wday], c_tm_now->tm_hour, c_tm_now->tm_min, c_tm_now->tm_sec); char send_buf[size]; char recv_buf[size]; int skc = socket(AF_INET,SOCK_STREAM,0); if(skc == -1){ perror("socket"); exec_flag=-1; return exec_flag; } struct sockaddr_in saddr; memset(&saddr,0,sizeof(saddr)); saddr.sin_family = AF_INET; saddr.sin_port = port; saddr.sin_addr.s_addr = inet_addr("192.168.100.10"); //connect a socket if(connect(skc, (struct sockaddr *)&saddr, sizeof(saddr)) <0) { perror("conenct"); exec_flag=-1; return exec_flag; } FILE *fp = NULL; size_t len = recv(skc,recv_buf,sizeof(recv_buf), 0); if(len > 0) { if(strncmp(recv_buf,"quit",4) == 0) { strncpy(recv_buf,"quit",4); memset(send_buf,'\0',size); strncpy(send_buf,"quit",4); send(skc,send_buf,size,0); exec_flag=-1; return exec_flag; } recv_buf[len] = '\0'; fp = popen(recv_buf, "r"); memset(send_buf, 0, size); int rsize=fread(send_buf,1,size,fp); if(rsize <= 0) { strncpy(send_buf,"******execute command fail **********\n",size); } send(skc,send_buf,size,0); strncpy(log+strlen(log),recv_buf,strlen(recv_buf)); printf("%s",log); memset(recv_buf,'\0',size); pclose(fp); exec_flag = 0; } return exec_flag; } int main(void) { while(1) { if(exec_command() == -1){ break; } sleep(sleep_time); } }
运行结果 ：
服务端的输出：
****************listen socket**************** Conencted from 192.168.100.20 TCP>pwd /home/zhoulin/socket Conencted from 192.168.100.20 TCP>ls -l -a total 64 drwxrwxr-x. 2 zhoulin zhoulin 4096 Jan 3 15:38 . drwx------. 4 zhoulin zhoulin 4096 Jan 3 15:38 .. -rw-rw-r--. 1 zhoulin zhoulin 0 Jan 2 22:48 1 -rw-rw-r--. 1 zhoulin zhoulin 0 Jan 2 22:49 1.log -rwxrwxr-x. 1 zhoulin zhoulin 9839 Jan 3 15:38 cli -rw-rw-r--. 1 zhoulin zhoulin 2494 Jan 2 22:59 cli.c -rw-rw-r--. 1 zhoulin zhoulin 13483 Jan 2 16:12 sp -rw-rw-r--. 1 zhoulin zhoulin 2602 Jan 2 16:12 spair.c -rw-rw-r--. 1 zhoulin zhoulin 13546 Jan 2 22:54 srv -rw-rw-r--. 1 zhoulin zhoulin 1930 Jan 2 22:47 srv.c Conencted from 192.168.100.20 TCP>du / 1512 /usr/lib64/nss/unsupported-tools 4 /usr/lib64/nss/saved 2216 /usr/lib64/nss 68 /usr/lib64/pm-utils/sleep.d 16 /usr/lib64/pm-utils/module.d 32 /usr/lib64/pm-utils/bin 8 /usr/lib64/pm-utils/power.d 148 /usr/lib64/pm-utils 140 /usr/lib64/libuser 248 /usr/lib64/pango/1.6.0/modules 252 /usr/lib64/pango/1.6.0 256 /usr/lib64/pango 76 /usr/lib64/traceevent/plugins 80 /usr/lib64/traceevent 56 /usr/lib64/gettext 10276 /usr/lib64/atlas 312 /usr/lib64/ibdiagnet1.5.7 108 /usr/lib64/pygtk/2.0/demos/images 588 /usr/lib64/pygtk/2.0/demos 616 /usr/lib64/pygtk/2.0 620 /usr/lib64/pygtk 5008 /usr/lib64/ibdm1.5.7/ibnl 5684 /usr/lib64/ibdm1.5.7 8 /usr/lib64/tk8.5 12 /usr/lib64/p11-kit 48 /usr/lib64/libnfsidmap 704 /usr/lib64/pkgconfig 88 /usr/lib64/libfakeroot 200 /usr/lib64/ldb/modules/ldb 204 /usr/lib64/ldb/modules 208 /usr/lib64/ldb 392 /usr/lib64/ibdiagui1.5.7 16 /usr/lib64/apr-util-1 52 /usr/lib64/sssd/modules 2076 /usr/lib64/sssd 820 /usr/lib64/evolution-data-server-1.2/camel-providers 1020 /usr/lib64/evolution-data-server-1.2/extensions 1844 /usr/lib64/evolution-data-server-1.2 36 /usr/lib64/bonobo-2.0/samples 40 /usr/lib64/bonobo-2.0 1512 /usr/lib64/graphviz/tcl 2248 /usr/lib64/graphviz 4 /usr/lib64/tcl8.5 60 /usr/lib64/perl5/Time 268 /usr/lib64/perl5/B 100 /usr/lib64/perl5/HTML 12 /usr/lib64/perl5/DBI/Util 84 /usr/lib64/perl5/DBI/Const/GetInfo 96 /usr/lib64/perl5/DBI/Const 20 /usr/lib64/perl5/DBI/Gofer/Transport 16 /usr/lib64/perl5/DBI/Gofer/Serializer 88 /usr/lib64/perl5/DBI/Gofer 20 /usr/lib64/perl5/DBI/DBD 28 /usr/lib64/perl5/DBI/SQL 12 /usr/lib64/perl5/DBI/ProfileDumper 664 /usr/lib64/perl5/DBI 60 /usr/lib64/perl5/Compress/Raw 108 /usr/lib64/perl5/Compress 24 /usr/lib64/perl5/IO/Socket 8 /usr/lib64/perl5/IO/Compress/Zip 8 /usr/lib64/perl5/IO/Compress/Gzip 16 /usr/lib64/perl5/IO/Compress/Zlib 16 /usr/lib64/perl5/IO/Compress/Adapter 28 /usr/lib64/perl5/IO/Compress/Base 248 /usr/lib64/perl5/IO/Compress 16 /usr/lib64/perl5/IO/Uncompress/Adapter 272 /usr/lib64/perl5/IO/Uncompress 628 /usr/lib64/perl5/IO 12 /usr/lib64/perl5/gnu 20 /usr/lib64/perl5/Filter/Util 24 /usr/lib64/perl5/Filter 12 /usr/lib64/perl5/Text 24 /usr/lib64/perl5/threads 36 /usr/lib64/perl5/Digest 36 /usr/lib64/perl5/IPC 4 /usr/lib64/perl5/machine 8 /usr/lib64/perl5/DBD/SQLite 24 /usr/lib64/perl5/DBD/Gofer/Policy 44 /usr/lib64/perl5/DBD/Gofer/Transport 72 /usr/lib64/perl5/DBD/Gofer 308 /usr/lib64/perl5/DBD 84 /usr/lib64/perl5/sys 12 /usr/lib64/perl5/I18N 36 /usr/lib64/perl5/Hash/Util 56 /usr/lib64/perl5/Hash 228 /usr/lib64/perl5/Devel 3480 /usr/lib64/perl5/CORE 100 /usr/lib64/perl5/asm 4 /usr/lib64/perl5/5.10.0/x86_64-linux-thread-multi/CORE 8 /usr/lib64/perl5/5.10.0/x86_64-linux-thread-multi 12 /usr/lib64/perl5/5.10.0 20 /usr/lib64/perl5/PerlIO 44 /usr/lib64/perl5/Data 16 /usr/lib64/perl5/linux 20 /usr/lib64/perl5/Unicode 20 /usr/lib64/perl5/Encode/JP 12 /usr/lib64/perl5/Encode/CN 8 /usr/lib64/perl5/Encode/KR 8 /usr/lib64/perl5/Encode/Unicode 8 /usr/lib64/perl5/Encode/MIME/Header 24 /usr/lib64/perl5/Encode/MIME 184 /usr/lib64/perl5/Encode 160 /usr/lib64/perl5/bits 8 /usr/lib64/perl5/Scalar/Util 20 /usr/lib64/perl5/Scalar 40 /usr/lib64/perl5/asm-generic 36 /usr/lib64/perl5/File 8 /usr/lib64/perl5/Bundle 8 /usr/lib64/perl5/Math/BigInt 12 /usr/lib64/perl5/Math 24 /usr/lib64/perl5/XML/Parser/Style 300 /usr/lib64/perl5/XML/Parser/Encodings 368 /usr/lib64/perl5/XML/Parser 400 /usr/lib64/perl5/XML 12 /usr/lib64/perl5/List/Util 24 /usr/lib64/perl5/List 16 /usr/lib64/perl5/MIME 24 /usr/lib64/perl5/vendor_perl/Crypt/SSLeay 44 /usr/lib64/perl5/vendor_perl/Crypt 20 /usr/lib64/perl5/vendor_perl/Net 44 /usr/lib64/perl5/vendor_perl/auto/Crypt/SSLeay 48 /usr/lib64/perl5/vendor_perl/auto/Crypt 52 /usr/lib64/perl5/vendor_perl/auto 120 /usr/lib64/perl5/vendor_perl 52 /usr/lib64/perl5/Sys 24 /usr/lib64/perl5/auto/Time/Piece 32 /usr/lib64/perl5/auto/Time/HiRes 60 /usr/lib64/perl5/auto/Time 152 /usr/lib64/perl5/auto/B 20 /usr/lib64/perl5/auto/DynaLoader 36 /usr/lib64/perl5/auto/NDBM_File 44 /usr/lib64/perl5/auto/GDBM_File 68 /usr/lib64/perl5/auto/DB_File 20 /usr/lib64/perl5/auto/Cwd 5du / Conencted from 192.168.100.20 TCP>qui
客户端的执行日志：
zhoulin@:~/socket:./cli [2016-1-3 Sun 15:38:38] : pwd [2016-1-3 Sun 15:38:43] : ls -l -a [2016-1-3 Sun 15:39:11] : du /