Added support for quote commands before a transfer using SFTP and test

case 614.
Allow SFTP quote commands chmod, chown, chgrp to set a value of 0.

CHANGES

@@ -8,6 +8,14 @@
 Dan F (14 May 2007)
 - Added SFTP directory listing test case 613.
 
+- Added support for quote commands before a transfer using SFTP and test
+  case 614.
+
+- Changed the post-quote commands to occur after the transferred file is
+  closed.
+
+- Allow SFTP quote commands chmod, chown, chgrp to set a value of 0.
+
 Dan F (9 May 2007)
 - Kristian Gunstone fixed a problem where overwriting an uploaded file with
   sftp didn't truncate it first, which would corrupt the file if the new

RELEASE-NOTES

@@ -16,6 +16,7 @@ This release includes the following changes:
  o uses less memory in non-pipelined use cases
  o CURLOPT_HTTP200ALIASES matched transfers assume HTTP 1.0 compliance
  o more than one test harness can run at the same time without conflict
+ o SFTP now supports quote commands before a transfer
 
 This release includes the following bugfixes:
 
@@ -41,6 +42,7 @@ This release includes the following bugfixes:
  o connection cache growth in multi handles
  o better handling of out of memory conditions
  o overwriting an uploaded file with sftp now truncates it first
+ o SFTP quote commands chmod, chown, chgrp can now set a value of 0
 
 This release includes the following known bugs:
 

docs/curl.1

@@ -897,17 +897,17 @@ file will not be read and used. See the \fI-K/--config\fP for details on the
 default config file search path.
 .IP "-Q/--quote <command>"
 (FTP/SFTP) Send an arbitrary command to the remote FTP or SFTP server. Quote
-commands are
-sent BEFORE the transfer is taking place (just after the initial PWD command
-to be exact). To make commands take place after a successful transfer, prefix
-them with a dash '-' (only the latter is supported with SFTP). To make
-commands get sent after libcurl has changed working directory, just
-before the transfer command(s), prefix the command with '+'. You may
-specify any amount of commands. If the server returns failure for one
-of the commands, the entire operation will be aborted. You must send
-syntactically correct FTP commands as RFC959 defines to FTP servers, or
-one of the following commands (with appropriate arguments) to SFTP servers:
-chgrp, chmod, chown, ln, mkdir, rename, rm, rmdir, symlink.
+commands are sent BEFORE the transfer is taking place (just after the
+initial PWD command in an FTP transfer, to be exact). To make commands
+take place after a successful transfer, prefix them with a dash '-'.
+To make commands get sent after libcurl has changed working directory,
+just before the transfer command(s), prefix the command with '+' (this
+is only supported for FTP). You may specify any number of commands. If
+the server returns failure for one of the commands, the entire operation
+will be aborted. You must send syntactically correct FTP commands as
+RFC959 defines to FTP servers, or one of the following commands (with
+appropriate arguments) to SFTP servers: chgrp, chmod, chown, ln, mkdir,
+rename, rm, rmdir, symlink.
 
 This option can be used multiple times.
 .IP "--random-file <file>"

docs/libcurl/curl_easy_setopt.3

@@ -839,19 +839,20 @@ address. Default FTP operations are passive, and thus won't use PORT.
 You disable PORT again and go back to using the passive version by setting
 this option to NULL.
 .IP CURLOPT_QUOTE
-Pass a pointer to a linked list of FTP commands to pass to the server prior to
-your ftp request. This will be done before any other FTP commands are issued
-(even before the CWD command). The linked list should be a fully valid list of
-'struct curl_slist' structs properly filled in. Use \fIcurl_slist_append(3)\fP
-to append strings (commands) to the list, and clear the entire list afterwards
-with \fIcurl_slist_free_all(3)\fP. Disable this operation again by setting a
-NULL to this option.
+Pass a pointer to a linked list of FTP or SFTP commands to pass to
+the server prior to your ftp request. This will be done before any
+other commands are issued (even before the CWD command for FTP). The
+linked list should be a fully valid list of 'struct curl_slist' structs
+properly filled in with text strings. Use \fIcurl_slist_append(3)\fP
+to append strings (commands) to the list, and clear the entire list
+afterwards with \fIcurl_slist_free_all(3)\fP. Disable this operation
+again by setting a NULL to this option.
 .IP CURLOPT_POSTQUOTE
-Pass a pointer to a linked list of FTP commands to pass to the server after
-your ftp transfer request. The linked list should be a fully valid list of
-struct curl_slist structs properly filled in as described for
-\fICURLOPT_QUOTE\fP. Disable this operation again by setting a NULL to this
-option.
+Pass a pointer to a linked list of FTP or SFTP commands to pass to the
+server after your ftp transfer request. The linked list should be a
+fully valid list of struct curl_slist structs properly filled in as
+described for \fICURLOPT_QUOTE\fP. Disable this operation again by
+setting a NULL to this option.
 .IP CURLOPT_PREQUOTE
 Pass a pointer to a linked list of FTP commands to pass to the server after
 the transfer type is set. The linked list should be a fully valid list of

lib/ssh.c

@@ -714,6 +714,14 @@ CURLcode Curl_sftp_do(struct connectdata *conn, bool *done)
 
   *done = TRUE; /* unconditionally */
 
+  /* Send any quote commands */
+  if(conn->data->set.quote) {
+    infof(conn->data, "Sending quote commands\n");
+    res = sftp_sendquote(conn, conn->data->set.quote);
+    if (res != CURLE_OK)
+      return res;
+  }
+
   if (data->set.upload) {
     /*
      * NOTE!!!  libssh2 requires that the destination path is a full path
@@ -980,17 +988,18 @@ CURLcode Curl_sftp_done(struct connectdata *conn, CURLcode status,
   Curl_safefree(sftp->homedir);
   sftp->homedir = NULL;
 
-  /* Before we shut down, see if there are any post-quote commands to send: */
-  if(!status && !premature && conn->data->set.postquote) {
-    rc = sftp_sendquote(conn, conn->data->set.postquote);
-  }
-
   if (sftp->sftp_handle) {
     if (libssh2_sftp_close(sftp->sftp_handle) < 0) {
       infof(conn->data, "Failed to close libssh2 file\n");
     }
   }
 
+  /* Before we shut down, see if there are any post-quote commands to send: */
+  if(!status && !premature && conn->data->set.postquote) {
+    infof(conn->data, "Sending postquote commands\n");
+    rc = sftp_sendquote(conn, conn->data->set.postquote);
+  }
+
   if (sftp->sftp_session) {
     if (libssh2_sftp_shutdown(sftp->sftp_session) < 0) {
       infof(conn->data, "Failed to stop libssh2 sftp subsystem\n");
@@ -1060,7 +1069,7 @@ get_pathname(const char **cpp, char **path)
   const char *cp = *cpp, *end;
   char quot;
   u_int i, j;
-  const char *WHITESPACE = " \t\r\n";
+  static const char * const WHITESPACE = " \t\r\n";
 
   cp += strspn(cp, WHITESPACE);
   if (!*cp) {
@@ -1239,7 +1248,7 @@ static CURLcode sftp_sendquote(struct connectdata *conn,
         /* Now set the new attributes... */
         if (curl_strnequal(item->data, "chgrp", 5)) {
           attrs.gid = strtol(path1, NULL, 10);
-          if (attrs.gid == 0) {
+          if (attrs.gid == 0 && !ISDIGIT(path1[0])) {
             free(path1);
             free(path2);
             failf(data, "Syntax error: chgrp gid not a number");
@@ -1248,7 +1257,7 @@ static CURLcode sftp_sendquote(struct connectdata *conn,
         }
         else if (curl_strnequal(item->data, "chmod", 5)) {
           attrs.permissions = strtol(path1, NULL, 8);/* permissions are octal */
-          if (attrs.permissions == 0) {
+          if (attrs.permissions == 0 && !ISDIGIT(path1[0])) {
             free(path1);
             free(path2);
             failf(data, "Syntax error: chmod permissions not a number");
@@ -1257,7 +1266,7 @@ static CURLcode sftp_sendquote(struct connectdata *conn,
         }
         else if (curl_strnequal(item->data, "chown", 5)) {
           attrs.uid = strtol(path1, NULL, 10);
-          if (attrs.uid == 0) {
+          if (attrs.uid == 0 && !ISDIGIT(path1[0])) {
             free(path1);
             free(path2);
             failf(data, "Syntax error: chown uid not a number");

tests/data/Makefile.am

@@ -41,4 +41,4 @@ EXTRA_DIST = test1 test108 test117 test127 test20 test27 test34 test46	   \
  test603 test401 test402 test290 test291 test292 test293 test403 test404   \
  test405 test604 test605 test606 test607 test608 test609 test294 test295   \
  test296 test297 test298 test610 test611 test612 test406 test407 test408   \
- test409 test613
+ test409 test613 test614

tests/data/test614

@@ -0,0 +1,49 @@
+<testcase>
+<info>
+<keywords>
+SFTP
+pre-quote
+directory
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<datacheck>
+d?????????   N     U     U          N ???  N NN:NN .
+d?????????   N     U     U          N ???  N NN:NN ..
+d?????????   N     U     U          N ???  N NN:NN asubdir
+-r-?r-?r-?   1     U     U         37 Jan  1  2000 plainfile.txt
+-r-?r-?r-?   1     U     U         47 Dec 31  2000 rofile.txt
+</datacheck>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+sftp
+</server>
+<precheck>
+perl %SRCDIR/libtest/test613.pl prepare %PWD/log/test614.dir
+</precheck>
+ <name>
+SFTP pre-quote chmod
+ </name>
+ <command>
+--key curl_client_key --pubkey curl_client_key.pub -u %USER: -Q "chmod 444 %PWD/log/test614.dir/plainfile.txt" sftp://%HOSTIP:%SSHPORT%PWD/log/test614.dir/
+</command>
+<postcheck>
+perl %SRCDIR/libtest/test613.pl postprocess %PWD/log/test614.dir %PWD/log/curl614.out
+</postcheck>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<valgrind>
+disable
+</valgrind>
+</verify>
+</testcase>