Objective-C

SFTP Get/Set File Permission

See more SFTP Examples

Demonstrates how to set the permissions of a file on the SFTP server. Objective-C

#import <CkoSFtp.h>
#import <NSString.h>

BOOL success = NO;

//  This example assumes the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

CkoSFtp *sftp = [[CkoSFtp alloc] init];

//  Connect to the SSH/SFTP server.  
NSString *hostname = @"sftp.example.com";
int port = 22;
success = [sftp Connect: hostname port: [NSNumber numberWithInt: port]];
if (success != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

//  Authenticate with the SSH server.  Chilkat SFTP supports
//  both password-based authenication as well as public-key
//  authentication.  This example uses password authenication.
success = [sftp AuthenticatePw: @"myLogin" password: @"myPassword"];
if (success != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

//  After authenticating, the SFTP subsystem must be initialized:
success = [sftp InitializeSftp];
if (success != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

//  Get the file permissions for the "hamlet.xml" file on the server.
//  The hamlet.xml file is located in the qa_data directory found under the HOME directory of the SSH user account.
//  We are passing the remote file path (we are not passing a file handle returned by a previous call to OpenFile).
BOOL isHandle = NO;
BOOL followLinks = YES;
int permVal = [[sftp GetFilePermissions: @"qa_data/hamlet.xml" bFollowLinks: followLinks bIsHandle: isHandle] intValue];
if (permVal < 0) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

//  Note: Filesystem permissions on Linux/Unix/MacOSX are typically written in octal (POSIX file permissions).  For example 0644 is octal.
//  To convert to decimal: octal 644 = 6*8^2 + 4*8 + 4 = 420 (decimal)
//  
//  The server may return a permissions value (in octal) such as 100644.
//  The "100" indicates the file type, such as regular file or directory. 

//  Show the decimal value of the permissions
NSLog(@"%@%d",@"decimal permissions value: ",permVal);

//  To set the file permissions, pass the integer value.
//  Let's change the permissions to 0664, which is 6*8^2 + 6*8 + 4 = 436 (decimal)
success = [sftp SetPermissions: @"qa_data/hamlet.xml" bIsHandle: isHandle perm: [NSNumber numberWithInt: 436]];
if (success != YES) {
    NSLog(@"%@",sftp.LastErrorText);
    return;
}

NSLog(@"%@",@"Success.");