Date: Wed, 17 May 2017 11:01:03 +0200 From: u-uy74@...ey.se To: musl@...ts.openwall.com Subject: Re: Question about setting argv when manually using dynamic linker On Tue, May 16, 2017 at 08:38:56PM -0400, John Regan wrote: > Hi there - I was wondering if it's possible to somehow set argv when > calling the dynamic linker to load a program. ... > I'd like to retain whatever was actually typed on the command line (in this > case, set argv to "app"), since many apps look at argv to change > behavior, ie - gzip vs gunzip. > > I tried seeing if there was some switch I could pass to the linker, etc - > as far as I can tell, there's no easy way to do this. Set argv to whatever you need when you exec*() the dynamic loader, which is straightforward with a binary wrapper (not with a shell). A binary wrapper also adds less overhead then going through a shell. There is imho hardly any incentive to put such functionalty into the loader. I say this even though we are dependent here on such tricks, to work around programs which insist on guessing things when not asked to. Regards, Rune
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.