On Thursday, April 15, 2004, at 02:25 , Jeff Clites wrote:
For Unix platforms at least, you should be able to do this:
executablePath = isAbsolute($0) ? dirname($0) : cwd().dirname($0)
That absolutely does not work, as already pointed out. Ths looks like a reasonable reference implementation (LGPL), though:
http://www.opensource.apple.com/darwinsource/10.3/libiconv-9/libiconv/srclib/ progreloc.c
On Windows and Linux, it uses Win32 and /proc to provide a robust implementation. Otherwise, it guesses by looking at $0 and $ENV{PATH}.
My guess is that there's a more reliable (and non-portable) way to do this on Mac OS X, since Carbon applications need to reliably open the resource fork of the executable.
Ah! Indeed there is.
http://developer.apple.com/documentation/Carbon/Reference/Process_Manager/ index.html
And, indeed, it is witheringly non-portable.
CFDictionaryRef dict = ProcessInformationCopyDictionary(
kCurrentProcess, kProcessDictionaryIncludeAllInformationMask);
CFString cfPath = (CFString *) CFDictionaryGetValue(dict, kIOBundleExecutableKey);
CFIndex length = CFStringGetMaximumSizeForEncoding(cfPath, kCFEncodingUTF8);
char *path = (char *) malloc(length + 1);
CFStringGetCString(cfPath, path, length + 1, kCFEncodingUTF8);
CFRelease(dict);
Ahem.
I'm sure the ProcessInformationCopyDictionary API is implemented in terms of something sane at the Darwin level, but God only knows what it is.
—
Gordon Henriksen [EMAIL PROTECTED]
