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/*
* linux/fs/binfmt_elks.c
*
* Copyright (C) 1996 Martin von Löwis
* original #!-checking implemented by tytso.
* ELKS hack added by Chad Page...
* Cleaned up some more by Robert de Bath
*/
#include <linux/module.h>
#ifndef LINUX_VERSION_CODE
#include <linux/version.h>
#endif
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/malloc.h>
#include <linux/binfmts.h>
static int do_load_elksaout(struct linux_binprm *bprm,struct pt_regs *regs)
{
char *cp, *interp, *i_name, *i_arg;
int retval;
/* What a horrible hack! :-) */
if ((bprm->buf[0] != 1) || (bprm->buf[1] != 3) ||
(bprm->buf[2] != 0x20 && bprm->buf[2] != 0x10) ||
(bprm->buf[3] != 4) || bprm->sh_bang)
return -ENOEXEC;
bprm->sh_bang++;
iput(bprm->inode);
#if LINUX_VERSION_CODE >= 0x010300
bprm->dont_iput=1;
#endif
interp = "/lib/elksemu";
i_name = interp;
i_arg = 0;
for (cp=i_name; *cp && (*cp != ' ') && (*cp != '\t'); cp++) {
if (*cp == '/')
i_name = cp+1;
}
/*
* OK, we've parsed out the interpreter name and
* (optional) argument.
* Splice in (1) the interpreter's name for argv[0]
* (2) (optional) argument to interpreter
* (3) filename of shell script (replace argv[0])
*
* This is done in reverse order, because of how the
* user environment and arguments are stored.
*/
remove_arg_zero(bprm);
bprm->p = copy_strings(1, &bprm->filename, bprm->page, bprm->p, 2);
bprm->argc++;
if (i_arg) {
bprm->p = copy_strings(1, &i_arg, bprm->page, bprm->p, 2);
bprm->argc++;
}
bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
bprm->argc++;
if (!bprm->p)
return -E2BIG;
/*
* OK, now restart the process with the interpreter's inode.
* Note that we use open_namei() as the name is now in kernel
* space, and we don't need to copy it.
*/
retval = open_namei(interp, 0, 0, &bprm->inode, NULL);
if (retval)
return retval;
#if LINUX_VERSION_CODE >= 0x010300
bprm->dont_iput=0;
#endif
retval=prepare_binprm(bprm);
if(retval<0)
return retval;
return search_binary_handler(bprm,regs);
}
static int load_elksaout(struct linux_binprm *bprm,struct pt_regs *regs)
{
int retval;
MOD_INC_USE_COUNT;
retval = do_load_elksaout(bprm,regs);
MOD_DEC_USE_COUNT;
return retval;
}
struct linux_binfmt elksaout_format = {
#ifndef MODULE
NULL, 0, load_elksaout, NULL, NULL
#else
NULL, &mod_use_count_, load_elksaout, NULL, NULL
#endif
};
int init_elksaout_binfmt(void) {
return register_binfmt(&elksaout_format);
}
#ifdef MODULE
#if LINUX_VERSION_CODE < 0x010300
char kernel_version[] = UTS_RELEASE;
#endif
int init_module(void)
{
return init_elksaout_binfmt();
}
void cleanup_module( void) {
unregister_binfmt(&elksaout_format);
}
#endif
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