This is the mail archive of the libc-help@sourceware.org mailing list for the glibc project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: librt and libpthread in alternate prefix


Mike Frysinger wrote:
On Thursday 14 May 2009 22:25:49 Poor Yorick wrote:
Mike Frysinger wrote:
> On Thursday 14 May 2009 21:06:49 Poor Yorick wrote:
>> Mike Frysinger wrote:
>> > On Thursday 14 May 2009 20:00:36 Poor Yorick wrote:
>> >> Mike Frysinger wrote:
>> >> > On Tuesday 12 May 2009 10:15:16 Poor Yorick wrote:
>> >> >> Mike Frysinger wrote:
>> >> >> > On Monday 11 May 2009 23:34:16 Poor Yorick wrote:
>> >> >> >> Because my goal is to build a software collection in an
>> >> >> >> alternate library path which uses its own glibc, I'm trying
>> >> >> >> to get the new loader to work from the alternate location
>> >> >> >> without setting --library-path.
>> >> >> >
>> >> >> > so use a wrapper script that builds paths using $0
>> >> >>
>> >> >> That's a kludge that doesn't work well, since wrapper scripts
>> >> >> aren't suitable for the #! line.
>> >> >
>> >> > i dont really know what you're talking about here. #!/bin/sh
>> >> > works just fine.
>> >>
>> >> I mean that I can't wrap binaries compiled against the alternate
>> >> glibc in a script that calls the real binary using the new loader. >> >> For example, if I wrap awk in a script called awk_new, I can't do
>> >> this:
>> >>
>> >> !# /path/to/alternate/awk_new
>> >>
>> >> because the !# mechanism requires a binary, not a script.
>> >
>> > your wrapper is a script that executes the right ldso with the right
>> > paths. use #!/bin/sh like normal.
>>
>> If this is what you had in mind (awk being a wrapper for the real awk):
>>
>> #! /bin/sh /path/to/alternate/bin/awk
>
> i dont know why you keeping going down this line of logic. you said
> you're concerned with running different libs and that's it.
> #!/bin/sh
> ${0%/*}/ld.so .....


This is not acceptable, because if this script is called "awk", users will
expect to be able to do this:

#! /path/to/alternate/bin/awk

and they will get a "permission denied" error, because now awk is just a
script (wrapping the real awk) instead of an executable.  On the #! line,
the second item must be binary executable, not a script.

i really havent a clue wahat you're talking about. whatever. -mike

Just try it out. You'll get a "permission denied" error.


--
Yorick


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]