Lua

Get a Remote File's Last-Access Time

Demonstrates the Chilkat SFtp.GetFileLastAccessStr method, which returns a remote file's last-access date and time. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: The access time is meant to update whenever a file is read, but in practice it is often unreliable: many systems mount filesystems with options like noatime to avoid a disk write on every read, so the value may not reflect recent reads. Treat it as a hint rather than an authoritative record of when a file was last opened.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the SFtp.GetFileLastAccessStr method, which returns a remote file's last-access
-- date and time.  The 1st argument is the remote path (or handle), the 2nd selects whether
-- symbolic links are followed, and the 3rd indicates whether the 1st argument is a handle.

local sftp = chilkat.SFtp.new()

-- Connect, authenticate, and initialize the SFTP subsystem.
local port = 22
local success = sftp:connect("sftp.example.com", port)
if not success then
    print(sftp.last_error_text)
    return
end

-- 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.
local password = "mySshPassword"

success = sftp:authenticate_pw("mySshLogin", password)
if not success then
    print(sftp.last_error_text)
    return
end

success = sftp:initialize_sftp()
if not success then
    print(sftp.last_error_text)
    return
end

-- The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
-- The 3rd argument (bIsHandle) is false here because the 1st argument is a path, not an
-- open handle.
local bFollowLinks = true
local bIsHandle = false

local lastAccess = sftp:get_file_last_access_str("subdir/report.pdf", bFollowLinks, bIsHandle)
if not sftp.last_method_success then
    print(sftp.last_error_text)
    return
end

print("Last accessed: " .. lastAccess)

sftp:disconnect()