Mercurial > hg > toybox
annotate toys/pending/ftpget.c @ 1231:ee5a6875d695 draft
Fix cpio -it: don't close(fd) unless we opened it.
author | Isaac Dunham <ibid.ag@gmail.com> |
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date | Thu, 27 Mar 2014 07:02:01 -0500 |
parents | ab7f336bfe52 |
children | e59d4322331b |
rev | line source |
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Attached is an implementation for ftpget/put commands.
Ashwini Sharma <ak.ashwini1981@gmail.com>
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1 /* ftpget.c - Get a remote file from FTP. |
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2 * |
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3 * Copyright 2013 Ranjan Kumar <ranjankumar.bth@gmail.com> |
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com> |
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5 * |
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6 * No Standard. |
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7 * |
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8 USE_FTPGET(NEWTOY(ftpget, "<2cvu:p:P#<0=21>65535", TOYFLAG_BIN)) |
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9 USE_FTPGET(OLDTOY(ftpput,ftpget, "<2vu:p:P#<0=21>65535", TOYFLAG_BIN)) |
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10 |
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11 config FTPGET |
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12 bool "ftpget/ftpput" |
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13 default n |
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14 help |
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15 usage: ftpget [-cv] [-u USER -p PASSWORD -P PORT] HOST_NAME [LOCAL_FILENAME] REMOTE_FILENAME |
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16 usage: ftpput [-v] [-u USER -p PASSWORD -P PORT] HOST_NAME [REMOTE_FILENAME] LOCAL_FILENAME |
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17 |
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18 ftpget - Get a remote file from FTP. |
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19 ftpput - Upload a local file on remote machine through FTP. |
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20 |
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21 -c Continue previous transfer. |
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22 -v Verbose. |
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23 -u User name. |
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24 -p Password. |
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25 -P Port Number (default 21). |
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26 */ |
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27 #define FOR_ftpget |
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28 #include "toys.h" |
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29 |
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30 GLOBALS( |
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31 long port; // char *port; |
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32 char *password; |
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33 char *username; |
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34 |
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35 FILE *sockfp; |
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36 int c; |
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37 int isget; |
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38 char buf[sizeof(struct sockaddr_storage)]; |
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39 ) |
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40 |
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41 #define DATACONNECTION_OPENED 125 |
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42 #define FTPFILE_STATUSOKAY 150 |
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43 #define FTP_COMMAND_OKAY 200 |
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44 #define FTPFILE_STATUS 213 |
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45 #define FTPSERVER_READY 220 |
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46 #define CLOSE_DATACONECTION 226 |
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47 #define PASSIVE_MODE 227 |
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48 #define USERLOGGED_SUCCESS 230 |
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49 #define PASSWORD_REQUEST 331 |
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50 #define REQUESTED_PENDINGACTION 350 |
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51 |
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52 |
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53 static void setport(unsigned port_num) |
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54 { |
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55 int af = ((struct sockaddr *)TT.buf)->sa_family; |
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56 |
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57 if (af == AF_INET) ((struct sockaddr_in*)TT.buf)->sin_port = port_num; |
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58 else if (af == AF_INET6) ((struct sockaddr_in6*)TT.buf)->sin6_port = port_num; |
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59 } |
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60 |
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61 static int connect_to_stream() |
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62 { |
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63 int sockfd, af = ((struct sockaddr *)TT.buf)->sa_family; |
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64 |
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65 sockfd = xsocket(af, SOCK_STREAM, 0); |
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66 if (connect(sockfd, (struct sockaddr*)TT.buf,((af == AF_INET)? |
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67 sizeof(struct sockaddr_in):sizeof(struct sockaddr_in6))) < 0) { |
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68 close(sockfd); |
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69 perror_exit("can't connect to remote host"); |
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70 } |
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71 return sockfd; |
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72 } |
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73 |
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74 //close ftp connection and print the message. |
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75 static void close_stream(char *msg_str) |
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76 { |
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77 char *str = toybuf; //toybuf holds response data. |
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78 |
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79 //Remove garbage chars (from ' ' space to '\x7f') DEL remote server response. |
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80 while ((*str >= 0x20) && (*str < 0x7f)) str++; |
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81 *str = '\0'; |
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82 if (TT.sockfp) fclose(TT.sockfp); |
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83 error_exit("%s server response: %s", (msg_str) ? msg_str:"", toybuf); |
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84 } |
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85 |
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86 //send command to ftp and get return status. |
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87 static int get_ftp_response(char *command, char *param) |
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88 { |
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89 unsigned cmd_status = 0; |
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90 char *fmt = "%s %s\r\n"; |
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91 |
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92 if (command) { |
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93 if (!param) fmt += 3; |
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94 fprintf(TT.sockfp, fmt, command, param); |
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95 fflush(TT.sockfp); |
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96 if (toys.optflags & FLAG_v) |
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97 fprintf(stderr, "FTP Request: %s %s\r\n", command, param); |
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98 } |
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99 |
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100 do { |
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101 if (!fgets(toybuf, sizeof(toybuf)-1, TT.sockfp)) close_stream(NULL); |
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102 } while (!isdigit(toybuf[0]) || toybuf[3] != ' '); |
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103 |
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104 toybuf[3] = '\0'; |
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105 cmd_status = atolx_range(toybuf, 0, INT_MAX); |
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106 toybuf[3] = ' '; |
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107 return cmd_status; |
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108 } |
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109 |
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110 static void send_requests(void) |
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111 { |
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112 int cmd_status = 0; |
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113 |
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114 //FTP connection request. |
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115 if (get_ftp_response(NULL, NULL) != FTPSERVER_READY) close_stream(NULL); |
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116 |
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117 //230 User authenticated, password please; 331 Password request. |
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118 cmd_status = get_ftp_response("USER", TT.username); |
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119 if (cmd_status == PASSWORD_REQUEST) { //user logged in. Need Password. |
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120 if (get_ftp_response("PASS", TT.password) != USERLOGGED_SUCCESS) |
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121 close_stream("PASS"); |
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122 } else if (cmd_status == USERLOGGED_SUCCESS); //do nothing |
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123 else close_stream("USER"); |
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124 //200 Type Binary. Command okay. |
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125 if (get_ftp_response("TYPE I", NULL) != FTP_COMMAND_OKAY) |
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126 close_stream("TYPE I"); |
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127 } |
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128 |
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129 static void get_sockaddr(char *host) |
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130 { |
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131 struct addrinfo hints, *result; |
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132 char *ptr, port[6]; |
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133 int status; |
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134 |
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135 errno = 0; |
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136 snprintf(port, 6, "%ld", TT.port); |
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137 |
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138 memset(&hints, 0 , sizeof(struct addrinfo)); |
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139 hints.ai_family = AF_UNSPEC; |
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140 hints.ai_socktype = SOCK_STREAM; |
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141 |
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142 status = getaddrinfo(host, port, &hints, &result); |
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143 if (status) error_exit("bad address '%s' : %s", host, gai_strerror(status)); |
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144 |
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145 memcpy(TT.buf, result->ai_addr, result->ai_addrlen); |
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146 freeaddrinfo(result); |
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147 } |
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148 |
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149 // send commands to ftp fo PASV mode. |
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150 static void verify_pasv_mode(char *r_filename) |
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151 { |
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152 char *pch; |
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153 unsigned portnum; |
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154 |
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155 //vsftpd reply like:- "227 Entering Passive Mode (125,19,39,117,43,39)". |
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156 if (get_ftp_response("PASV", NULL) != PASSIVE_MODE) close_stream("PASV"); |
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157 |
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158 //Response is "NNN <some text> (N1,N2,N3,N4,P1,P2) garbage. |
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159 //Server's IP is N1.N2.N3.N4 |
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160 //Server's port for data connection is P1*256+P2. |
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161 if ((pch = strrchr(toybuf, ')'))) *pch = '\0'; |
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162 if ((pch = strrchr(toybuf, ','))) *pch = '\0'; |
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163 portnum = atolx_range(pch + 1, 0, 255); |
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164 |
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165 if ((pch = strrchr(toybuf, ','))) *pch = '\0'; |
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166 portnum = portnum + (atolx_range(pch + 1, 0, 255) * 256); |
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167 setport(htons(portnum)); |
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168 |
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169 if (TT.isget && get_ftp_response("SIZE", r_filename) != FTPFILE_STATUS) |
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170 TT.c = 0; |
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171 } |
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172 |
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173 /* |
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174 * verify the local file presence. |
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175 * if present, get the size of the file. |
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176 */ |
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177 static void is_localfile_present(char *l_filename) |
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178 { |
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179 struct stat sb; |
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180 |
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181 if (stat(l_filename, &sb) < 0) perror_exit("stat"); |
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182 //if local file present, then request for pending file action. |
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183 if (sb.st_size > 0) { |
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184 sprintf(toybuf, "REST %lu", (unsigned long) sb.st_size); |
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185 if (get_ftp_response(toybuf, NULL) != REQUESTED_PENDINGACTION) TT.c = 0; |
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186 } else TT.c = 0; |
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187 } |
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188 |
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189 static void transfer_file(int local_fd, int remote_fd) |
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190 { |
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191 int len, rfd = (TT.isget)?remote_fd:local_fd, |
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192 wfd = (TT.isget)?local_fd:remote_fd; |
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193 |
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194 if (rfd < 0 || wfd < 0) error_exit("Error in file creation:"); |
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195 while ((len = xread(rfd, toybuf, sizeof(toybuf)))) xwrite(wfd, toybuf, len); |
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196 } |
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197 |
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198 static void get_file(char *l_filename, char *r_filename) |
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199 { |
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200 int local_fd = -1, remote_fd; |
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201 |
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202 verify_pasv_mode(r_filename); |
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203 remote_fd = connect_to_stream(); //Connect to data socket. |
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204 |
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205 //if local file name will be '-' then local fd will be stdout. |
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206 if ((l_filename[0] == '-') && !l_filename[1]) { |
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207 local_fd = 1; //file descriptor will become stdout. |
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208 TT.c = 0; |
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209 } |
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210 |
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211 //if continue, check for local file existance. |
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212 if (TT.c) is_localfile_present(l_filename); |
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213 |
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214 //verify the remote file presence. |
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215 if (get_ftp_response("RETR", r_filename) > FTPFILE_STATUSOKAY) |
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216 close_stream("RETR"); |
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217 |
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218 //if local fd is not stdout, create a file descriptor. |
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219 if (local_fd == -1) { |
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220 int flags = O_WRONLY; |
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221 |
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222 flags |= (TT.c)? O_APPEND : (O_CREAT | O_TRUNC); |
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223 local_fd = xcreate((char *)l_filename, flags, 0666); |
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Attached is an implementation for ftpget/put commands.
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224 } |
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225 transfer_file(local_fd, remote_fd); |
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parents:
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226 xclose(remote_fd); |
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227 xclose(local_fd); |
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228 if (get_ftp_response(NULL, NULL) != CLOSE_DATACONECTION) close_stream(NULL); |
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229 get_ftp_response("QUIT", NULL); |
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230 toys.exitval = EXIT_SUCCESS; |
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231 } |
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232 |
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233 static void put_file(char *r_filename, char *l_filename) |
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234 { |
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235 int local_fd = 0, remote_fd; |
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236 unsigned cmd_status = 0; |
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237 |
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238 verify_pasv_mode(r_filename); |
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239 remote_fd = connect_to_stream(); //Connect to data socket. |
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240 |
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241 //open the local file for transfer. |
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242 if ((l_filename[0] != '-') || l_filename[1]) |
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243 local_fd = xcreate((char *)l_filename, O_RDONLY, 0666); |
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244 |
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245 //verify for the remote file status, Ok or Open: transfer File. |
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246 cmd_status = get_ftp_response("STOR", r_filename); |
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247 if ( (cmd_status == DATACONNECTION_OPENED) || |
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248 (cmd_status == FTPFILE_STATUSOKAY)) { |
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249 transfer_file(local_fd, remote_fd); |
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250 if (get_ftp_response(NULL, NULL) != CLOSE_DATACONECTION) close_stream(NULL); |
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251 get_ftp_response("QUIT", NULL); |
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252 toys.exitval = EXIT_SUCCESS; |
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253 } else { |
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254 toys.exitval = EXIT_FAILURE; |
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255 close_stream("STOR"); |
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256 } |
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257 xclose(remote_fd); |
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258 xclose(local_fd); |
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259 } |
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260 |
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261 void ftpget_main(void) |
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262 { |
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263 char **argv = toys.optargs; //host name + file name. |
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264 |
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265 TT.isget = toys.which->name[3] == 'g'; |
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266 TT.c = 1; |
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267 //if user name is not specified. |
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268 if (!(toys.optflags & FLAG_u) && (toys.optflags & FLAG_p)) |
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269 error_exit("Missing username:"); |
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270 //if user name and password is not specified in command line. |
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271 if (!(toys.optflags & FLAG_u) && !(toys.optflags & FLAG_p)) |
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272 TT.username = TT.password ="anonymous"; |
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273 |
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274 //if continue is not in the command line argument. |
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275 if (TT.isget && !(toys.optflags & FLAG_c)) TT.c = 0; |
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276 |
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277 if (toys.optflags & FLAG_v) fprintf(stderr, "Connecting to %s\n", argv[0]); |
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278 get_sockaddr(argv[0]); |
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279 |
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280 TT.sockfp = xfdopen(connect_to_stream(), "r+"); |
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281 send_requests(); |
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282 |
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283 if (TT.isget) get_file(argv[1], argv[2] ? argv[2] : argv[1]); |
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284 else put_file(argv[1], argv[2] ? argv[2] : argv[1]); |
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285 } |