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client.c
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client.c
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#include<stdio.h>
#include<unistd.h>
#include<sys/ipc.h>
#include<sys/shm.h>
// for receiving
#define SHM_KEY1 800
#define SHM_KEY2 801
#define SHM_KEY3 802
#define SHM_KEY4 803
// for sending
#define SHM_KEY10 804
#define SHM_KEY11 805
#define SHM_KEY12 806
#define SHM_KEY13 807
#define SHM_KEY14 808
#define SHM_KEY15 809
void loading(unsigned int millisecond){
for(int i=0;i<4;i++){
usleep(millisecond);
printf("\b\\");
fflush(stdout);
usleep(millisecond);
printf("\b|");
fflush(stdout);
usleep(millisecond);
printf("\b/");
fflush(stdout);
usleep(millisecond);
printf("\b-");
fflush(stdout);
}
}
int main(int argc, char *argv[]){
printf("==========================================================================\n");
printf("###### # # ###### #### # # #### #### ##### ###### ##### \n");
printf("# # # # # # # # # # # # # # # \n");
printf("##### # # ##### #### ###### # # # # # ##### # # \n");
printf("# # # # # # # # # # # # # ##### \n");
printf("# # # # # # # # # # # # # # # # \n");
printf("# # ###### ###### #### # # #### #### # ###### # # \n");
printf("==========================================================================\n\n");
if(argc>1 && argc<4){
if(strcmp(argv[1],"-r")==0 && argv[2]){
int shm_id[4];
void *shared_mem[4];
unsigned long file_size;
char *file_data;
unsigned int file_name_len;
char *file_name;
printf("## Start receive data.\n");
printf("## Get shared memory to save");
shm_id[0] = shmget(SHM_KEY1, 0, IPC_CREAT|0666);
// check shared memory
if(shm_id[0] == -1){
printf("\n## The master process is not running.\n");
return -1;
}
shared_mem[0]=shmat(shm_id[0], (void *)0,0);
file_size = atoi(shared_mem[0]);
printf("..1");
shm_id[1] = shmget(SHM_KEY2, 0, IPC_CREAT|0666);
file_data=shmat(shm_id[1], (void *)0,0);
printf("..2");
shm_id[2] = shmget(SHM_KEY3, 0, IPC_CREAT|0666);
shared_mem[1] = shmat(shm_id[2], (void *)0,0);
file_name_len = atoi(shared_mem[1]);
printf("..3");
shm_id[3] = shmget(SHM_KEY4, 0,IPC_CREAT|0666);
file_name=shmat(shm_id[3], (void *)0,0);
printf("..4");
// pointer to string
FILE *fp = fopen(argv[2],"w");
fwrite((char *)file_data, 1, file_size, fp);
fclose(fp);
printf("..5\n");
printf("## Received success!\n");
shmdt(shared_mem[0]);
shmdt(shared_mem[1]);
shmdt(file_data);
shmdt(file_name);
}
else if(strcmp(argv[1],"-s")==0 && argv[2]){
unsigned long filelen;
char *buf;
unsigned int count;
unsigned int user;
unsigned int working;
int shm_id[6];
void *shared_mem[6];
unsigned long file_size;
char *file_data;
char *file_data2;
unsigned int file_name_len;
char *file_name;
printf("## Start transfer data.\n");
FILE *fp = fopen(argv[2],"r");
fseek(fp,0,SEEK_END);
filelen = ftell(fp);
rewind(fp);
buf = (char *)malloc((filelen+1)*sizeof(char));
fread(buf, filelen, 1, fp);
fclose(fp);
printf("## Loaded file. %dbytes.\n",filelen);
// read working 0:finished 1: working
shm_id[0] = shmget(SHM_KEY15, 0, IPC_CREAT|0666);
// check shared memory
if(shm_id[0] == -1){
printf("\n## The master process is not running.\n");
return -1;
}
shared_mem[0]=shmat(shm_id[0], (void *)0,0);
printf("## waiting for my turn.. -");
while(1){
loading(100000);
working = atoi(shared_mem[0]);
if(working == 0){
// switch work mode
working=1;
sprintf((char *)shared_mem[0], "%d",working);
// read count and count++
shm_id[1] = shmget(SHM_KEY10, 0, IPC_CREAT|0666);
shared_mem[1]=shmat(shm_id[1], (void *)0,0);
count = atoi(shared_mem[1]);
count++;
sprintf((char *)shared_mem[1], "%d",count);
printf("\n## Connected. \n",count);
// file_size
shm_id[2] = shmget(SHM_KEY11, sizeof(file_size), IPC_CREAT|0666);
shared_mem[2]=shmat(shm_id[2], (void *)0,0);
file_size = filelen;
sprintf((char *)shared_mem[2], "%ld",file_size);
// file_data
shm_id[3] = shmget(SHM_KEY12, filelen, IPC_CREAT|0666);
file_data=shmat(shm_id[3], (void *)0,0);
strcpy(file_data,buf);
//file_data = buf;
free(buf);
// file_name_len
shm_id[4] = shmget(SHM_KEY13, sizeof(file_name_len), IPC_CREAT|0666);
shared_mem[3]=shmat(shm_id[4], (void *)0,0);
file_name_len = strlen(argv[2]);
sprintf((char *)shared_mem[3], "%d",file_name_len);
// file_name
shm_id[5] = shmget(SHM_KEY14, file_name_len, IPC_CREAT|0666);
file_name=shmat(shm_id[5], (void *)0,0);
strcpy(file_name,argv[2]);
// switch work mode
working=2;
sprintf((char *)shared_mem[0], "%d",working);
printf("## Transfer success!\n");
break;
}
}
shmdt(shared_mem[0]);
shmdt(shared_mem[1]);
shmdt(shared_mem[2]);
shmdt(shared_mem[3]);
shmdt(file_data);
shmdt(file_name);
return 0;
}
return 0;
}
printf("## Parameter error, please retry it.\n");
return 0;
}