Visual FoxPro
Visual FoxPro
Create a Hard Link on an SFTP Server
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Demonstrates the Chilkat SFtp.HardLink method, which creates a hard link to an existing remote file. The first argument is the existing file and the second is the new link path. It uses the OpenSSH hardlink@openssh.com extension and succeeds only when the server supports it.
Background: A hard link is a second name for the same file data, not a pointer to a path: both names are equal, the data persists until the last name is removed, and there is no "original" to break. Unlike a symbolic link it cannot span filesystems and cannot target a directory. Because it depends on a non-standard OpenSSH extension, expect it to fail against servers that do not implement it.
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LOCAL lnSuccess
LOCAL loSftp
LOCAL lnPort
LOCAL lcPassword
lnSuccess = 0
* Demonstrates the SFtp.HardLink method, which creates a hard link to an existing remote file.
* The 1st argument is the existing file and the 2nd is the new link path.
loSftp = CreateObject('Chilkat.SFtp')
* Connect, authenticate, and initialize the SFTP subsystem.
lnPort = 22
lnSuccess = loSftp.Connect("sftp.example.com",lnPort)
IF (lnSuccess = 0) THEN
? loSftp.LastErrorText
RELEASE loSftp
CANCEL
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.
lcPassword = "mySshPassword"
lnSuccess = loSftp.AuthenticatePw("mySshLogin",lcPassword)
IF (lnSuccess = 0) THEN
? loSftp.LastErrorText
RELEASE loSftp
CANCEL
ENDIF
lnSuccess = loSftp.InitializeSftp()
IF (lnSuccess = 0) THEN
? loSftp.LastErrorText
RELEASE loSftp
CANCEL
ENDIF
* Create a hard link. This uses the OpenSSH hardlink@openssh.com extension and succeeds only
* when the server supports it.
lnSuccess = loSftp.HardLink("subdir/data.bin","subdir/data_backup.bin")
IF (lnSuccess = 0) THEN
? loSftp.LastErrorText
RELEASE loSftp
CANCEL
ENDIF
? "Hard link created."
loSftp.Disconnect()
RELEASE loSftp