/*
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/*
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* linux/fs/binfmt_java.c
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* linux/fs/binfmt_java.c
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*
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*
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* Copyright (C) 1996 Brian A. Lantz
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* Copyright (C) 1996 Brian A. Lantz
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* derived from binfmt_script.c
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* derived from binfmt_script.c
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*/
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*/
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/stat.h>
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#include <linux/stat.h>
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#include <linux/malloc.h>
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#include <linux/malloc.h>
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#include <linux/binfmts.h>
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#include <linux/binfmts.h>
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#define _PATH_JAVA "/usr/bin/java"
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#define _PATH_JAVA "/usr/bin/java"
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#define _PATH_APPLET "/usr/bin/appletviewer"
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#define _PATH_APPLET "/usr/bin/appletviewer"
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#define _PATH_SH "/bin/bash"
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#define _PATH_SH "/bin/bash"
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char binfmt_java_interpreter[65] = _PATH_JAVA;
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char binfmt_java_interpreter[65] = _PATH_JAVA;
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char binfmt_java_appletviewer[65] = _PATH_APPLET;
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char binfmt_java_appletviewer[65] = _PATH_APPLET;
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static int do_load_script(struct linux_binprm *bprm,struct pt_regs *regs)
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static int do_load_script(struct linux_binprm *bprm,struct pt_regs *regs)
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{
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{
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char *cp, *interp, *i_name;
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char *cp, *interp, *i_name;
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int retval;
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int retval;
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unsigned char *ucp = (unsigned char *) bprm->buf;
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unsigned char *ucp = (unsigned char *) bprm->buf;
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if ((ucp[0] != 0xca) || (ucp[1] != 0xfe) || (ucp[2] != 0xba) || (ucp[3] != 0xbe))
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if ((ucp[0] != 0xca) || (ucp[1] != 0xfe) || (ucp[2] != 0xba) || (ucp[3] != 0xbe))
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return -ENOEXEC;
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return -ENOEXEC;
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iput(bprm->inode);
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iput(bprm->inode);
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bprm->dont_iput=1;
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bprm->dont_iput=1;
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/*
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/*
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* OK, we've set the interpreter name
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* OK, we've set the interpreter name
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* Splice in (1) the interpreter's name for argv[0] (_PATH_SH)
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* Splice in (1) the interpreter's name for argv[0] (_PATH_SH)
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* (2) the name of the java wrapper for argv[1] (_PATH_JAVA)
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* (2) the name of the java wrapper for argv[1] (_PATH_JAVA)
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* (3) filename of Java class (replace argv[0])
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* (3) filename of Java class (replace argv[0])
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* without leading path or trailing '.class'
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* without leading path or trailing '.class'
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*
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*
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* This is done in reverse order, because of how the
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* This is done in reverse order, because of how the
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* user environment and arguments are stored.
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* user environment and arguments are stored.
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*/
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*/
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remove_arg_zero(bprm);
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remove_arg_zero(bprm);
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if ((cp = strstr (bprm->filename, ".class")) != NULL)
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if ((cp = strstr (bprm->filename, ".class")) != NULL)
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*cp = 0;
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*cp = 0;
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if ((i_name = strrchr (bprm->filename, '/')) != NULL)
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if ((i_name = strrchr (bprm->filename, '/')) != NULL)
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i_name++;
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i_name++;
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else
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else
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i_name = bprm->filename;
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i_name = bprm->filename;
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->argc++;
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bprm->argc++;
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strcpy (bprm->buf, binfmt_java_interpreter);
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strcpy (bprm->buf, binfmt_java_interpreter);
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cp = bprm->buf;
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cp = bprm->buf;
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bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2);
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bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2);
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bprm->argc++;
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bprm->argc++;
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strcpy (bprm->buf, _PATH_SH);
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strcpy (bprm->buf, _PATH_SH);
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interp = bprm->buf;
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interp = bprm->buf;
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if ((i_name = strrchr (bprm->buf, '/')) != NULL)
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if ((i_name = strrchr (bprm->buf, '/')) != NULL)
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i_name++;
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i_name++;
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else
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else
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i_name = bprm->buf;
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i_name = bprm->buf;
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->argc++;
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bprm->argc++;
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if (!bprm->p)
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if (!bprm->p)
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return -E2BIG;
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return -E2BIG;
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/*
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/*
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* OK, now restart the process with the interpreter's inode.
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* OK, now restart the process with the interpreter's inode.
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* Note that we use open_namei() as the name is now in kernel
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* Note that we use open_namei() as the name is now in kernel
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* space, and we don't need to copy it.
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* space, and we don't need to copy it.
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*/
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*/
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retval = open_namei(interp, 0, 0, &bprm->inode, NULL);
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retval = open_namei(interp, 0, 0, &bprm->inode, NULL);
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if (retval)
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if (retval)
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return retval;
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return retval;
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bprm->dont_iput=0;
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bprm->dont_iput=0;
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retval=prepare_binprm(bprm);
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retval=prepare_binprm(bprm);
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if(retval<0)
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if(retval<0)
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return retval;
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return retval;
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return search_binary_handler(bprm,regs);
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return search_binary_handler(bprm,regs);
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}
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}
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static int do_load_applet(struct linux_binprm *bprm,struct pt_regs *regs)
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static int do_load_applet(struct linux_binprm *bprm,struct pt_regs *regs)
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{
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{
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char *cp, *interp, *i_name;
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char *cp, *interp, *i_name;
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int retval;
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int retval;
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if (strncmp (bprm->buf, "<!--applet", 10))
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if (strncmp (bprm->buf, "<!--applet", 10))
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return -ENOEXEC;
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return -ENOEXEC;
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iput(bprm->inode);
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iput(bprm->inode);
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bprm->dont_iput=1;
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bprm->dont_iput=1;
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/*
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/*
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* OK, we've set the interpreter name
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* OK, we've set the interpreter name
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* Splice in (1) the interpreter's name for argv[0] (_PATH_SH)
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* Splice in (1) the interpreter's name for argv[0] (_PATH_SH)
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* (2) the name of the appletviewer wrapper for argv[1] (_PATH_APPLET)
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* (2) the name of the appletviewer wrapper for argv[1] (_PATH_APPLET)
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* (3) filename of html file (replace argv[0])
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* (3) filename of html file (replace argv[0])
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*
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*
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* This is done in reverse order, because of how the
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* This is done in reverse order, because of how the
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* user environment and arguments are stored.
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* user environment and arguments are stored.
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*/
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*/
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remove_arg_zero(bprm);
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remove_arg_zero(bprm);
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i_name = bprm->filename;
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i_name = bprm->filename;
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->argc++;
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bprm->argc++;
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strcpy (bprm->buf, binfmt_java_appletviewer);
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strcpy (bprm->buf, binfmt_java_appletviewer);
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cp = bprm->buf;
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cp = bprm->buf;
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bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2);
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bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2);
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bprm->argc++;
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bprm->argc++;
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strcpy (bprm->buf, _PATH_SH);
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strcpy (bprm->buf, _PATH_SH);
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interp = bprm->buf;
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interp = bprm->buf;
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if ((i_name = strrchr (bprm->buf, '/')) != NULL)
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if ((i_name = strrchr (bprm->buf, '/')) != NULL)
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i_name++;
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i_name++;
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else
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else
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i_name = bprm->buf;
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i_name = bprm->buf;
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2);
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bprm->argc++;
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bprm->argc++;
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if (!bprm->p)
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if (!bprm->p)
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return -E2BIG;
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return -E2BIG;
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/*
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/*
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* OK, now restart the process with the interpreter's inode.
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* OK, now restart the process with the interpreter's inode.
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* Note that we use open_namei() as the name is now in kernel
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* Note that we use open_namei() as the name is now in kernel
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* space, and we don't need to copy it.
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* space, and we don't need to copy it.
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*/
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*/
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retval = open_namei(interp, 0, 0, &bprm->inode, NULL);
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retval = open_namei(interp, 0, 0, &bprm->inode, NULL);
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if (retval)
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if (retval)
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return retval;
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return retval;
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bprm->dont_iput=0;
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bprm->dont_iput=0;
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retval=prepare_binprm(bprm);
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retval=prepare_binprm(bprm);
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if(retval<0)
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if(retval<0)
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return retval;
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return retval;
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return search_binary_handler(bprm,regs);
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return search_binary_handler(bprm,regs);
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}
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}
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static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
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static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
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{
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{
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int retval;
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int retval;
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MOD_INC_USE_COUNT;
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MOD_INC_USE_COUNT;
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retval = do_load_script(bprm,regs);
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retval = do_load_script(bprm,regs);
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MOD_DEC_USE_COUNT;
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MOD_DEC_USE_COUNT;
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return retval;
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return retval;
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}
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}
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struct linux_binfmt java_format = {
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struct linux_binfmt java_format = {
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#ifndef MODULE
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#ifndef MODULE
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NULL, 0, load_script, NULL, NULL
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NULL, 0, load_script, NULL, NULL
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#else
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#else
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NULL, &mod_use_count_, load_script, NULL, NULL
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NULL, &mod_use_count_, load_script, NULL, NULL
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#endif
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#endif
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};
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};
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static int load_applet(struct linux_binprm *bprm,struct pt_regs *regs)
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static int load_applet(struct linux_binprm *bprm,struct pt_regs *regs)
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{
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{
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int retval;
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int retval;
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MOD_INC_USE_COUNT;
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MOD_INC_USE_COUNT;
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retval = do_load_applet(bprm,regs);
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retval = do_load_applet(bprm,regs);
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MOD_DEC_USE_COUNT;
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MOD_DEC_USE_COUNT;
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return retval;
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return retval;
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}
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}
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struct linux_binfmt applet_format = {
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struct linux_binfmt applet_format = {
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#ifndef MODULE
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#ifndef MODULE
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NULL, 0, load_applet, NULL, NULL
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NULL, 0, load_applet, NULL, NULL
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#else
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#else
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NULL, &mod_use_count_, load_applet, NULL, NULL
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NULL, &mod_use_count_, load_applet, NULL, NULL
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#endif
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#endif
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};
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};
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int init_java_binfmt(void) {
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int init_java_binfmt(void) {
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printk(KERN_INFO "JAVA Binary support v1.01 for Linux 1.3.98 (C)1996 Brian A. Lantz\n");
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printk(KERN_INFO "JAVA Binary support v1.01 for Linux 1.3.98 (C)1996 Brian A. Lantz\n");
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register_binfmt(&java_format);
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register_binfmt(&java_format);
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return register_binfmt(&applet_format);
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return register_binfmt(&applet_format);
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}
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}
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#ifdef MODULE
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#ifdef MODULE
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int init_module(void)
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int init_module(void)
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{
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{
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return init_java_binfmt();
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return init_java_binfmt();
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}
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}
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void cleanup_module( void) {
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void cleanup_module( void) {
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printk(KERN_INFO "Removing JAVA Binary support...\n");
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printk(KERN_INFO "Removing JAVA Binary support...\n");
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unregister_binfmt(&java_format);
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unregister_binfmt(&java_format);
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unregister_binfmt(&applet_format);
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unregister_binfmt(&applet_format);
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}
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}
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#endif
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#endif
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