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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | /* * linux/fs/binfmt_java.c * * Copyright (C) 1996 Brian A. Lantz * derived from binfmt_script.c */ #include <linux/module.h> #include <linux/string.h> #include <linux/stat.h> #include <linux/malloc.h> #include <linux/binfmts.h> #define _PATH_JAVA "/usr/bin/java" #define _PATH_APPLET "/usr/bin/appletviewer" #define _PATH_SH "/bin/bash" char binfmt_java_interpreter[65] = _PATH_JAVA; char binfmt_java_appletviewer[65] = _PATH_APPLET; static int do_load_script(struct linux_binprm *bprm,struct pt_regs *regs) { char *cp, *interp, *i_name; int retval; unsigned char *ucp = (unsigned char *) bprm->buf; if ((ucp[0] != 0xca) || (ucp[1] != 0xfe) || (ucp[2] != 0xba) || (ucp[3] != 0xbe)) return -ENOEXEC; iput(bprm->inode); bprm->dont_iput=1; /* * OK, we've set the interpreter name * Splice in (1) the interpreter's name for argv[0] (_PATH_SH) * (2) the name of the java wrapper for argv[1] (_PATH_JAVA) * (3) filename of Java class (replace argv[0]) * without leading path or trailing '.class' * * This is done in reverse order, because of how the * user environment and arguments are stored. */ remove_arg_zero(bprm); if ((cp = strstr (bprm->filename, ".class")) != NULL) *cp = 0; if ((i_name = strrchr (bprm->filename, '/')) != NULL) i_name++; else i_name = bprm->filename; bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2); bprm->argc++; strcpy (bprm->buf, binfmt_java_interpreter); cp = bprm->buf; bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2); bprm->argc++; strcpy (bprm->buf, _PATH_SH); interp = bprm->buf; if ((i_name = strrchr (bprm->buf, '/')) != NULL) i_name++; else i_name = bprm->buf; 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; bprm->dont_iput=0; retval=prepare_binprm(bprm); if(retval<0) return retval; return search_binary_handler(bprm,regs); } static int do_load_applet(struct linux_binprm *bprm,struct pt_regs *regs) { char *cp, *interp, *i_name; int retval; if (strncmp (bprm->buf, "<!--applet", 10)) return -ENOEXEC; iput(bprm->inode); bprm->dont_iput=1; /* * OK, we've set the interpreter name * Splice in (1) the interpreter's name for argv[0] (_PATH_SH) * (2) the name of the appletviewer wrapper for argv[1] (_PATH_APPLET) * (3) filename of html file (replace argv[0]) * * This is done in reverse order, because of how the * user environment and arguments are stored. */ remove_arg_zero(bprm); i_name = bprm->filename; bprm->p = copy_strings(1, &i_name, bprm->page, bprm->p, 2); bprm->argc++; strcpy (bprm->buf, binfmt_java_appletviewer); cp = bprm->buf; bprm->p = copy_strings(1, &cp, bprm->page, bprm->p, 2); bprm->argc++; strcpy (bprm->buf, _PATH_SH); interp = bprm->buf; if ((i_name = strrchr (bprm->buf, '/')) != NULL) i_name++; else i_name = bprm->buf; 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; bprm->dont_iput=0; retval=prepare_binprm(bprm); if(retval<0) return retval; return search_binary_handler(bprm,regs); } static int load_script(struct linux_binprm *bprm,struct pt_regs *regs) { int retval; MOD_INC_USE_COUNT; retval = do_load_script(bprm,regs); MOD_DEC_USE_COUNT; return retval; } struct linux_binfmt java_format = { #ifndef MODULE NULL, 0, load_script, NULL, NULL #else NULL, &mod_use_count_, load_script, NULL, NULL #endif }; static int load_applet(struct linux_binprm *bprm,struct pt_regs *regs) { int retval; MOD_INC_USE_COUNT; retval = do_load_applet(bprm,regs); MOD_DEC_USE_COUNT; return retval; } struct linux_binfmt applet_format = { #ifndef MODULE NULL, 0, load_applet, NULL, NULL #else NULL, &mod_use_count_, load_applet, NULL, NULL #endif }; int init_java_binfmt(void) { printk(KERN_INFO "JAVA Binary support v1.01 for Linux 1.3.98 (C)1996 Brian A. Lantz\n"); register_binfmt(&java_format); return register_binfmt(&applet_format); } #ifdef MODULE int init_module(void) { return init_java_binfmt(); } void cleanup_module( void) { printk(KERN_INFO "Removing JAVA Binary support...\n"); unregister_binfmt(&java_format); unregister_binfmt(&applet_format); } #endif |