I'm a newbie on a steep learning curve with SFTP in general. I am trying to implement libssh2 SFTP file upload to a CrushFTP server. Working with a slightly edited version of the sftp_write.c example, I find that if I call libssh2_sftp_open() with the path "newdir/file.txt" and the directory newdir exists in my FTP server's root, then I will get the file uploaded just fine.
If newdir does not exist, libssh2_sftp_open() function still succeeds and gives me a handle and a 0 libssh2_sftp_last_error() value, but when I call libssh2_sftp_write, I get an error -31 (ERROR_SFTP_PROTOCOL) on the function with status 4 (LIBSSH2_FX_FAILURE) as the libssh2_sftp_last_error(). No file is created. I'm surprised that libssh2_sftp_open() apparently works but I cannot write to the file. Is there something else I should have checked? What is the best practice approach for uploading a path with sub-directories that may not exist? William Shipley Schuyler House
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