Messages in this thread | | | Date | Mon, 3 May 2004 12:50:41 +0200 | From | Libor Vanek <> | Subject | Reading from file in module fails |
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Hi, I'm writing module which needs to read from file. I've got this simple sample code:
char buffer[4096]; ssize_t read; file *f; f = filp_open("/some/file",O_RDONLY | O_LARGEFILE,0); f->f_pos = 0; read = vfs_read(f,(char __user *) buffer,4096,&f->f_pos);
but here read value is "-14" (-EINVAL?) Does anybody has idea what's wrong?
It seems that file is opened OK (I've tested: if (f->f_op->read) { read = f->f_op->read(file, buf, count, pos); } and result was the same - so I assume that file is opened OK and structure "file f" is filled correctly.
I need to copy files (yes - I know that kernel shouldn't do this but I REALLY need) and there is nothing like "sys_copy" and "sys_sendfile" is not exported (which seems strange to me but there is nothing like EXPORT_SYMBOL(sys_sendfile) in fs/read_write.c
Thanks, Libor Vanek
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