unix课程设计基于中间件的图书管理系统(7)

printf(\ break; }

break; case 'l':

getm(buf,rec);

checkstat(rec[0][0]);

sprintf(cmd,\=\\\ opdb(cmd,buf,1);

printf(\

if((write(ns,buf,strlen(buf)))<=0){ printf(\ break; }

printf(\ break; case 'L':

getm(buf,rec);

sprintf(cmd,\=\\\ opdb(cmd,buf,1);

printf(\

if((write(ns,buf,strlen(buf)))<=0) {

printf(\ break; }

printf(\ break; case 'b':

getm(buf,rec);

sprintf(cmd,\r_id=\\\

if(opdb(cmd,NULL,1)!=0) {

printf(\ buf[0]='1';buf[1]='\\0';

if((write(ns,buf,strlen(buf)))<=0) {

printf(\ break; }

break; }

sprintf(cmd,\

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id=\\\

if(opdb(cmd,NULL,1)!=0) {

buf[0]='2';

if((write(ns,buf,strlen(buf)))<=0){ printf(\ break; }

break; }

printf(\ printf(\ bzero(cmd,sizeof(cmd));

sprintf(cmd,\(\\\ opdb(cmd,NULL,0); bzero(cmd,sizeof(cmd));

sprintf(cmd,\id=\\\

opdb(cmd,writer,0); buf[0]='0'; buf[1]='\\0';

if((write(ns,buf,strlen(buf)))<=0){ printf(\ break; }

printf(\ break; case 'r':

getm(buf,rec);

printf(\

sprintf(cmd,\where borrow.b_id=books.id&&borrow.r_id=\\\ opdb(cmd,buf,1);

printf(\ n=write(ns,buf,strlen(buf)); if(n<=0) {

printf(\ break; }

printf(\ break; case 'R':

getm(buf,rec);

sprintf(cmd,\

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r_id=\\\ opdb(cmd,buf,0);

sprintf(cmd,\id=\\\

opdb(cmd,buf,0); checkstat(rec[0][0]); buf[0]='0';

if(write(ns,buf,strlen(buf))<=0){ printf(\ exit(-1); }

break; case 'm':

getm(buf,rec);

printf(\ sprintf(cmd,\

borrow.b_id,books.name,borrow.b_date,date_add(borrow.b_date,interval 30 day),borrow.status from borrow,books where borrow.b_id=books.id&&borrow.r_id=\\\ opdb(cmd,buf,1);

printf(\ n=write(ns,buf,strlen(buf)); if(n<=0){

printf(\ break;

} printf(\ break; case 'M':

getm(buf,rec);

sprintf(cmd,\r_id=\\\ opdb(cmd,buf,0);

sprintf(cmd,\day) where r_id=\\\ opdb(cmd,buf,0); checkstat(rec[0][0]); buf[0]='0';

if(write(ns,buf,strlen(buf))<=0){ printf(\ exit(-1); }

break; case 'a':

getm(buf,rec);

sprintf(cmd,\ if(opdb(cmd,buf,1)!=0) {

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if(write(ns,buf,strlen(buf))<=0) {

printf(\ break; }

break; }

sprintf(cmd,\(\\\ opdb(cmd,buf,0); } } }

buf[0]='0';

if(write(ns,buf,strlen(buf))<=0) {

printf(\ exit(-1); }

break; case 'd':

getm(buf,rec);

printf(\

sprintf(cmd,\ opdb(cmd,buf,1);

n=write(ns,buf,strlen(buf)); if(n<=0){

printf(\ break; }

printf(\ printf(\ break; case 'D':

getm(buf,rec);

sprintf(cmd,\ opdb(cmd,buf,0); buf[0]='0';

if(write(ns,buf,strlen(buf))<=0) {

printf(\ break; }

break; default: break; 31

close(ns); exit(0); } } }

7.3中间件程序

#include #include #include #include #include #include #include #define rec_length 20 main(int argc, char **argv ) {

// structure defined for request as a client struct hostent *hp1; struct sockaddr_in sin1; struct servent *sp1; char sbuf[128]; int ss,spid;

char *sservice,*sdest;

// structure defined for request as a server struct sockaddr_in sin; struct servent *sp; int s,ns,pid,n;

char buf[128]; char *service;

// test the environment parameter: lservice, dservice, server_name if(argc==4){

service=argv[1]; sservice=argv[2]; sdest=argv[3]; } else {

fprintf(stderr,\

fprintf(stderr,\ fprintf(stderr,\

fprintf(stderr,\ exit(-1); }

if((sp=getservbyname(service,\ fprintf(stderr,\ exit(-5); }

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