Messages in this thread | | | Date | Mon, 3 May 2004 13:35:00 +0200 | From | Erik Mouw <> | Subject | Re: Reading from file in module fails |
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On Mon, May 03, 2004 at 12:50:41PM +0200, Libor Vanek wrote: > I need to copy files (yes - I know that kernel shouldn't do this but > I REALLY need).
This is ugly, but it should do the trick:
int rv; char *argv[4] = {"/bin/cp", "/tmp/foo", "/tmp/bar", NULL}; char *envp[3] = {"HOME=/", "PATH=/sbin:/bin:/usr/sbin:/usr/bin", NULL};
rv = call_usermodehelper(argv[0], argv, envp, 1);
if(rv < 0) { /* error handling */ }
Called from kernel, done in userspace. And if you want to access an SQL database from kernel tomorrow, it's just a matter of changing the usermode helper.
(BTW, if you need to copy files from kernel, it's usually a sign of bad design)
Erik
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