Can't execute curl

I'm using Matlab in a Unix environment.

The command curl "www.google.com" works very well in a shell.

If I try !curl "www.google.com" in matlab, I get :

curl: (48) An unknown option was passed in to libcurl

It seems that Matlab isn't sending directly the command I asked. Do you have any idea why this is happening?

Thanks

[Thomas]

what flavor of UNIX are using?

works fine for me on MAC and Ubuntu..

[Jonas_Carlson]

I had a similar problem running curl from Matlab. I found that Matlab (R2012a in my case) has its own links to libcurl in the Matlab directory tree. I renamed these and made new symbolic links to (in my case) libcurl.so, libcurl.so.4, and libcurl.so.4.2.0 After that, "!curl ..." worked just fine. /Jonas Carlson

[Daniel Côté]

I found a much cleaner and simpler solution. Empty the dynamic library path before calling your function. This works well:

!DYLD_LIBRARY_PATH="";curl http://www.google.com

or

unix('DYLD_LIBRARY_PATH="";curl http://www.google.com');

The problem comes from the fact the when you call a shell command (with !, unix() or system() it does not matter) MATLAB sets up a dynamic library path that links to a bunch of MATLAB internal libs. Not too sure why (to give you access to their own libs?). Regardless of why that is, DYLD_LIBRARY_PATH is filled with links to dynamic libraries inside the MATLAB package that take precedence over the system (at least in my case on OS X with R2014b but I suspect everyone else's case too). Setting it to nothing ('') prevents the incorrect dynamic linking and programs still work (at least, curl still works). It appears much better that messing with the libraries directly.

I found out by using !env to get the environment of the running process.

[Marianne Bezaire]

Daniel's solution above worked for me on Mac OS X

system(['!DYLD_LIBRARY_PATH=""' CommandToRun])