FTP quote commands prefixed with '*' now can fail without aborting

Prefixing the FTP quote commands with an asterisk really only
worked for the postquote actions. This is now fixed and test case
227 has been extended to verify.

CHANGES

@@ -6,6 +6,11 @@
 
                                   Changelog
 
+Daniel Stenberg (9 Apr 2010)
+- Prefixing the FTP quote commands with an asterisk really only worked for the
+  postquote actions. This is now fixed and test case 227 has been extended to
+  verify.
+
 Kamil Dudka (4 Apr 2010)
 - Eliminated a race condition in Curl_resolv_timeout().
 

RELEASE-NOTES

@@ -45,6 +45,7 @@ This release includes the following bugfixes:
  o RTSP GET_PARAMETER
  o timeout after last data chunk was handled
  o SFTP download hang
+ o FTP quote commands prefixed with '*' now can fail without aborting
 
 This release includes the following known bugs:
 

lib/ftp.c

@@ -1424,6 +1424,12 @@ static CURLcode ftp_state_quote(struct connectdata *conn,
     break;
   }
 
+  /*
+   * This state uses:
+   * 'count1' to iterate over the commands to send
+   * 'count2' to store wether to allow commands to fail
+   */
+
   if(init)
     ftpc->count1 = 0;
   else
@@ -1438,7 +1444,15 @@ static CURLcode ftp_state_quote(struct connectdata *conn,
       i++;
     }
     if(item) {
-      PPSENDF(&ftpc->pp, "%s", item->data);
+      char *cmd = item->data;
+      if(cmd[0] == '*') {
+        cmd++;
+        ftpc->count2 = 1; /* the sent command is allowed to fail */
+      }
+      else
+        ftpc->count2 = 0; /* failure means cancel operation */
+
+      PPSENDF(&ftpc->pp, "%s", cmd);
       state(conn, instate);
       quote = TRUE;
     }
@@ -2658,7 +2672,8 @@ static CURLcode ftp_statemach_act(struct connectdata *conn)
     case FTP_POSTQUOTE:
     case FTP_RETR_PREQUOTE:
     case FTP_STOR_PREQUOTE:
-      if(ftpcode >= 400) {
+      if((ftpcode >= 400) && !ftpc->count2) {
+        /* failure reponse code, and not allowed to fail */
         failf(conn->data, "QUOT command failed with %03d", ftpcode);
         return CURLE_QUOTE_ERROR;
       }

tests/data/test227

@@ -19,6 +19,7 @@ works
 </data>
 <servercmd>
 REPLY EPSV 500 no such command
+REPLY FAIL 500 this might not be a failure!
 </servercmd>
 </reply>
 
@@ -31,7 +32,7 @@ ftp
 FTP with quote ops
  </name>
  <command>
-ftp://%HOSTIP:%FTPPORT/227 -Q "NOOP 1" -Q "+NOOP 2" -Q "-NOOP 3"
+ftp://%HOSTIP:%FTPPORT/227 -Q "NOOP 1" -Q "+NOOP 2" -Q "-NOOP 3" -Q "*FAIL" -Q "+*FAIL HARD"
 </command>
 </client>
 
@@ -42,10 +43,12 @@ USER anonymous
 PASS ftp@example.com
 PWD
 NOOP 1
+FAIL
 EPSV
 PASV
 TYPE I
 NOOP 2
+FAIL HARD
 SIZE 227
 RETR 227
 NOOP 3