ftplinux环境下实现的ftp客户端模板.doc

#include #include #include #include #include #include #include #include #define FILELEN 512#define DATASIZE 512#define SENDCMDTYPE 1#define KEYPATH /etc/services#define KEYID 88typedef struct f_req long dataTransType; / data transfer typechar filePathFILELEN; f_req_t; typedef struct s_cmd long mtype; / type = SENDCMDTYPEf_req_t req; s_cmd_t;typedef struct f_data int datasize;char dataDATASIZE; f_data_t;typedef enum NOEXIST,NORIGHT,READY err_t;enum NORMALDATA,FILESTATUS;typedef struct r_data int type;union err_t error;f_data_t content; u_data; r_data_t;typedef struct r_cmd long mtype; / -dataTransTyper_data_t data; r_cmd_t;int msg_create(void)key_t key;int msgid;key = ftok(KEYPATH, KEYID);if (key = -1) perror(ftok);return -1;msgid = msgget(key, IPC_CREAT | 0600);if (msgid = -1) perror(msgget);return -1;return msgid;int send_req_to_server(int msgid, s_cmd_t *req)int ret;ret = msgsnd(msgid, req, sizeof(s_cmd_t) - sizeof(long), 0);if (ret = -1) perror(msgsnd);return -1;return 0;int main(int argc, char *argv)if (argc != 3) fprintf(stderr, Usage.n);exit(1);int msgid;int ret, fd;s_cmd_t req;r_cmd_t rep;int recvtype;msgid = msg_create();if (msgid = -1)exit(1);req.mtype = SENDCMDTYPE;req.req.dataTransType = getpid();strncpy(req.req.filePath, argv1, FILELEN);recvtype = getpid();ret = send_req_to_server(msgid, &req);if (ret = -1)exit(1);ret = msgrcv(msgid, &rep, sizeof(rep) - sizeof(long), recvtype, 0);if (ret = -1) perror(msgrcv);exit(1);if (rep.data.type = FILESTATUS) if (rep.data.u_data.error = NOEXIST) printf(file %s wrong!n, argv1);exit(1); else if (rep.data.u_data.error = NORIGHT) printf(No right access %s!n, argv1);exit(1);fd = creat(argv2, 0666);if (fd = -1) perror(creat);exit(1);while (1) ret = msgrcv(msgid, &rep, sizeof(rep) -sizeof(long), recvtype, 0);if (ret = -1) perror(msgrcv);exit(1);if (rep.data.u_data.content.datasize = 0)break;write(1,