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Re: A problematic combination of malloc and getCharacters.

Subject: Re: A problematic combination of malloc and getCharacters.
From: Aki Inoue <email@hidden>
Date: Wed, 24 Oct 2007 16:15:33 -0700
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I believe AuthorizationExecuteWithPrivileges() is expecting NULL- terminated, UTF-8, C-string as the args instead of non-terminated unichar array.

You can use -UTF8String methods for that.

Since the second arg to the function is defined to be a POSIX path representation, you should use -fileSystemRepresentation instead.

Aki

On 2007/10/24, at 15:58, deepak gopal wrote:

Hi
The method performChange would run a script which would modify a plist.

When the control reaches line 12 I get this message "/: /: is a directory" in the run log and when I check in the debugger I find that plistScript and garage have "/" as the value. So I know where the problem is but dont' know what's causing it or what the solution is.

There is no problem with the authorization or with the paths copyPlistScript_ (/tmp/script) or garage_ (/tmp/garage)

I assume that the memory allocation in line 4 and line 6 would give the same result.
Can someone guide me?
1 - (BOOL)performChange  {
2  char **plistArgs = (char **) malloc(3 *sizeof(char*));
3  NSString *shell = @"/bin/sh";
4 char *plistScript = (char *) malloc([copyPlistScript_ length]*sizeof(unichar)); 5 [copyPlistScript_ getCharacters:(unichar *) plistScript];

6 char *garage = (char *) malloc([garage_ lengthOfBytesUsingEncoding:NSUnicodeStringEncoding]); 7 [garage_ getCharacters:(unichar *) garage];
8  plistArgs[0] = plistScript;
9  plistArgs[1] = garage;
10 plistArgs[2] = NULL;
12 OSStatus status = AuthorizationExecuteWithPrivileges(authRef_, [shell UTF8String], 0, plistArgs, NULL);

13 if ((status == errAuthorizationCanceled) || (status != errAuthorizationSuccess)) { 14 NSLog(@"Desktop Break Change: Authorization failed when installing new configuration plists."); 15 return NO; 16 }
17  free(plistScript);
18  free(garage);
19 free(plistArgs);
20}
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	>A problematic combination of malloc and getCharacters. (From: deepak gopal <email@hidden>)

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