PureBasic

Set a Remote File's Last-Access Time

Demonstrates the Chilkat SFtp.SetLastAccessTimeStr method, which sets a remote file's last-access date and time. The arguments are the remote path (or handle), whether the first argument is a handle, and an RFC 822 formatted date/time string.

Background: Setting the access time explicitly is mainly for faithful restores and mirrors, where you want the copy's metadata to match the original exactly. Note that many servers update the access time on their own whenever a file is read (unless mounted noatime), so a value you set can be overwritten by ordinary access — making this the least durable of the timestamps to control.

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IncludeFile "CkSFtp.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the SFtp.SetLastAccessTimeStr method, which sets a remote file's last-access date
    ;  and time.  The 1st argument is the remote path (or handle), the 2nd (bIsHandle) indicates
    ;  which, and the 3rd is an RFC 822 formatted date/time string.

    sftp.i = CkSFtp::ckCreate()
    If sftp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ;  Connect, authenticate, and initialize the SFTP subsystem.
    port.i = 22
    success = CkSFtp::ckConnect(sftp,"sftp.example.com",port)
    If success = 0
        Debug CkSFtp::ckLastErrorText(sftp)
        CkSFtp::ckDispose(sftp)
        ProcedureReturn
    EndIf

    ;  Normally you would not hard-code the password in source.  You should instead obtain it
    ;  from an interactive prompt, environment variable, or a secrets vault.
    password.s = "mySshPassword"

    success = CkSFtp::ckAuthenticatePw(sftp,"mySshLogin",password)
    If success = 0
        Debug CkSFtp::ckLastErrorText(sftp)
        CkSFtp::ckDispose(sftp)
        ProcedureReturn
    EndIf

    success = CkSFtp::ckInitializeSftp(sftp)
    If success = 0
        Debug CkSFtp::ckLastErrorText(sftp)
        CkSFtp::ckDispose(sftp)
        ProcedureReturn
    EndIf

    ;  The 1st argument is a path, so bIsHandle is 0.
    bIsHandle.i = 0
    dateTimeStr.s = "Fri, 10 Jul 2026 20:15:30 -0600"
    success = CkSFtp::ckSetLastAccessTimeStr(sftp,"subdir/report.pdf",bIsHandle,dateTimeStr)
    If success = 0
        Debug CkSFtp::ckLastErrorText(sftp)
        CkSFtp::ckDispose(sftp)
        ProcedureReturn
    EndIf

    Debug "Last-access time set."

    CkSFtp::ckDisconnect(sftp)


    CkSFtp::ckDispose(sftp)


    ProcedureReturn
EndProcedure