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ruby.c
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/**********************************************************************
ruby.c -
$Author$
created at: Tue Aug 10 12:47:31 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#ifdef __CYGWIN__
#include <windows.h>
#include <sys/cygwin.h>
#endif
#include "internal.h"
#include "eval_intern.h"
#include "dln.h"
#include <stdio.h>
#include <sys/types.h>
#include <ctype.h>
#ifdef __hpux
#include <sys/pstat.h>
#endif
#if defined(LOAD_RELATIVE) && defined(HAVE_DLADDR)
#include <dlfcn.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if defined(HAVE_FCNTL_H)
#include <fcntl.h>
#elif defined(HAVE_SYS_FCNTL_H)
#include <sys/fcntl.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifndef MAXPATHLEN
# define MAXPATHLEN 1024
#endif
#include "ruby/util.h"
#ifndef HAVE_STDLIB_H
char *getenv();
#endif
#ifndef DISABLE_RUBYGEMS
# define DISABLE_RUBYGEMS 0
#endif
#if DISABLE_RUBYGEMS
#define DEFAULT_RUBYGEMS_ENABLED "disabled"
#else
#define DEFAULT_RUBYGEMS_ENABLED "enabled"
#endif
#define DISABLE_BIT(bit) (1U << disable_##bit)
enum disable_flag_bits {
disable_gems,
disable_rubyopt,
disable_flag_count
};
#define DUMP_BIT(bit) (1U << dump_##bit)
enum dump_flag_bits {
dump_version,
dump_version_v,
dump_copyright,
dump_usage,
dump_help,
dump_yydebug,
dump_syntax,
dump_parsetree,
dump_parsetree_with_comment,
dump_insns,
dump_flag_count
};
struct cmdline_options {
int sflag, xflag;
int do_loop, do_print;
int do_line, do_split;
int do_search;
unsigned int disable;
int verbose;
int safe_level;
unsigned int setids;
unsigned int dump;
const char *script;
VALUE script_name;
VALUE e_script;
struct {
struct {
VALUE name;
int index;
} enc;
} src, ext, intern;
VALUE req_list;
};
static void init_ids(struct cmdline_options *);
#define src_encoding_index GET_VM()->src_encoding_index
static struct cmdline_options *
cmdline_options_init(struct cmdline_options *opt)
{
MEMZERO(opt, *opt, 1);
init_ids(opt);
opt->src.enc.index = src_encoding_index;
opt->ext.enc.index = -1;
opt->intern.enc.index = -1;
#if DISABLE_RUBYGEMS
opt->disable |= DISABLE_BIT(gems);
#endif
return opt;
}
static NODE *load_file(VALUE, VALUE, int, struct cmdline_options *);
static void forbid_setid(const char *, struct cmdline_options *);
#define forbid_setid(s) forbid_setid((s), opt)
static struct {
int argc;
char **argv;
} origarg;
static void
usage(const char *name, int help)
{
/* This message really ought to be max 23 lines.
* Removed -h because the user already knows that option. Others? */
struct message {
const char *str;
unsigned short namelen, secondlen;
};
#define M(shortopt, longopt, desc) { \
shortopt " " longopt " " desc, \
(unsigned short)sizeof(shortopt), \
(unsigned short)sizeof(longopt), \
}
static const struct message usage_msg[] = {
M("-0[octal]", "", "specify record separator (\\0, if no argument)"),
M("-a", "", "autosplit mode with -n or -p (splits $_ into $F)"),
M("-c", "", "check syntax only"),
M("-Cdirectory", "", "cd to directory before executing your script"),
M("-d", ", --debug", "set debugging flags (set $DEBUG to true)"),
M("-e 'command'", "", "one line of script. Several -e's allowed. Omit [programfile]"),
M("-Eex[:in]", ", --encoding=ex[:in]", "specify the default external and internal character encodings"),
M("-Fpattern", "", "split() pattern for autosplit (-a)"),
M("-i[extension]", "", "edit ARGV files in place (make backup if extension supplied)"),
M("-Idirectory", "", "specify $LOAD_PATH directory (may be used more than once)"),
M("-l", "", "enable line ending processing"),
M("-n", "", "assume 'while gets(); ... end' loop around your script"),
M("-p", "", "assume loop like -n but print line also like sed"),
M("-rlibrary", "", "require the library before executing your script"),
M("-s", "", "enable some switch parsing for switches after script name"),
M("-S", "", "look for the script using PATH environment variable"),
M("-T[level=1]", "", "turn on tainting checks"),
M("-v", ", --verbose", "print version number, then turn on verbose mode"),
M("-w", "", "turn warnings on for your script"),
M("-W[level=2]", "", "set warning level; 0=silence, 1=medium, 2=verbose"),
M("-x[directory]", "", "strip off text before #!ruby line and perhaps cd to directory"),
M("-h", "", "show this message, --help for more info"),
};
static const struct message help_msg[] = {
M("--copyright", "", "print the copyright"),
M("--enable=feature[,...]", ", --disable=feature[,...]",
"enable or disable features"),
M("--external-encoding=encoding", ", --internal-encoding=encoding",
"specify the default external or internal character encoding"),
M("--version", "", "print the version"),
M("--help", "", "show this message, -h for short message"),
};
static const struct message features[] = {
M("gems", "", "rubygems (default: "DEFAULT_RUBYGEMS_ENABLED")"),
M("rubyopt", "", "RUBYOPT environment variable (default: enabled)"),
};
int i, w = 16, num = numberof(usage_msg) - (help ? 1 : 0);
#define SHOW(m) do { \
int wrap = help && (m).namelen + (m).secondlen - 2 > w; \
printf(" %.*s%-*.*s%-*s%s\n", (m).namelen-1, (m).str, \
(wrap ? 0 : w - (m).namelen + 1), \
(help ? (m).secondlen-1 : 0), (m).str + (m).namelen, \
(wrap ? w + 3 : 0), (wrap ? "\n" : ""), \
(m).str + (m).namelen + (m).secondlen); \
} while (0)
printf("Usage: %s [switches] [--] [programfile] [arguments]\n", name);
for (i = 0; i < num; ++i)
SHOW(usage_msg[i]);
if (!help) return;
for (i = 0; i < numberof(help_msg); ++i)
SHOW(help_msg[i]);
puts("Features:");
for (i = 0; i < numberof(features); ++i)
SHOW(features[i]);
}
#define rubylib_path_new rb_str_new
static void
push_include(const char *path, VALUE (*filter)(VALUE))
{
const char sep = PATH_SEP_CHAR;
const char *p, *s;
VALUE load_path = GET_VM()->load_path;
p = path;
while (*p) {
while (*p == sep)
p++;
if (!*p) break;
for (s = p; *s && *s != sep; s = CharNext(s));
rb_ary_push(load_path, (*filter)(rubylib_path_new(p, s - p)));
p = s;
}
}
#ifdef __CYGWIN__
static void
push_include_cygwin(const char *path, VALUE (*filter)(VALUE))
{
const char *p, *s;
char rubylib[FILENAME_MAX];
VALUE buf = 0;
p = path;
while (*p) {
unsigned int len;
while (*p == ';')
p++;
if (!*p) break;
for (s = p; *s && *s != ';'; s = CharNext(s));
len = s - p;
if (*s) {
if (!buf) {
buf = rb_str_new(p, len);
p = RSTRING_PTR(buf);
}
else {
rb_str_resize(buf, len);
p = strncpy(RSTRING_PTR(buf), p, len);
}
}
#ifdef HAVE_CYGWIN_CONV_PATH
#define CONV_TO_POSIX_PATH(p, lib) \
cygwin_conv_path(CCP_WIN_A_TO_POSIX|CCP_RELATIVE, (p), (lib), sizeof(lib))
#else
# error no cygwin_conv_path
#endif
if (CONV_TO_POSIX_PATH(p, rubylib) == 0)
p = rubylib;
push_include(p, filter);
if (!*s) break;
p = s + 1;
}
}
#define push_include push_include_cygwin
#endif
void
ruby_push_include(const char *path, VALUE (*filter)(VALUE))
{
if (path == 0)
return;
push_include(path, filter);
}
static VALUE
identical_path(VALUE path)
{
return path;
}
static VALUE
locale_path(VALUE path)
{
rb_enc_associate(path, rb_locale_encoding());
return path;
}
void
ruby_incpush(const char *path)
{
ruby_push_include(path, locale_path);
}
static VALUE
expand_include_path(VALUE path)
{
char *p = RSTRING_PTR(path);
if (!p)
return path;
if (*p == '.' && p[1] == '/')
return path;
return rb_file_expand_path(path, Qnil);
}
void
ruby_incpush_expand(const char *path)
{
ruby_push_include(path, expand_include_path);
}
#undef UTF8_PATH
#if defined _WIN32 || defined __CYGWIN__
static HMODULE libruby;
BOOL WINAPI
DllMain(HINSTANCE dll, DWORD reason, LPVOID reserved)
{
if (reason == DLL_PROCESS_ATTACH)
libruby = dll;
return TRUE;
}
HANDLE
rb_libruby_handle(void)
{
return libruby;
}
static inline void
translit_char_bin(char *p, int from, int to)
{
while (*p) {
if ((unsigned char)*p == from)
*p = to;
p++;
}
}
# define UTF8_PATH 1
#endif
#ifndef UTF8_PATH
# define UTF8_PATH 0
#endif
#if UTF8_PATH
static VALUE
str_conv_enc(VALUE str, rb_encoding *from, rb_encoding *to)
{
return rb_str_conv_enc_opts(str, from, to,
ECONV_UNDEF_REPLACE|ECONV_INVALID_REPLACE,
Qnil);
}
#endif
void ruby_init_loadpath_safe(int safe_level);
void
ruby_init_loadpath(void)
{
ruby_init_loadpath_safe(0);
}
void
ruby_init_loadpath_safe(int safe_level)
{
VALUE load_path;
ID id_initial_load_path_mark;
const char *paths = ruby_initial_load_paths;
#if defined LOAD_RELATIVE
# if defined HAVE_DLADDR || defined __CYGWIN__ || defined _WIN32
# define VARIABLE_LIBPATH 1
# else
# define VARIABLE_LIBPATH 0
# endif
# if VARIABLE_LIBPATH
char *libpath;
VALUE sopath;
# else
char libpath[MAXPATHLEN + 1];
# endif
size_t baselen;
char *p;
#if defined _WIN32 || defined __CYGWIN__
sopath = rb_str_new(0, MAXPATHLEN);
libpath = RSTRING_PTR(sopath);
GetModuleFileName(libruby, libpath, MAXPATHLEN);
#elif defined(__EMX__)
_execname(libpath, sizeof(libpath) - 1);
#elif defined(HAVE_DLADDR)
Dl_info dli;
if (dladdr((void *)(VALUE)expand_include_path, &dli)) {
char fbuf[MAXPATHLEN];
char *f = dln_find_file_r(dli.dli_fname, getenv(PATH_ENV), fbuf, sizeof(fbuf));
VALUE fname = rb_str_new_cstr(f ? f : dli.dli_fname);
rb_str_freeze(fname);
sopath = rb_realpath_internal(Qnil, fname, 1);
}
else {
sopath = rb_str_new(0, 0);
}
libpath = RSTRING_PTR(sopath);
#endif
#if !VARIABLE_LIBPATH
libpath[sizeof(libpath) - 1] = '\0';
#endif
#if defined DOSISH
translit_char(libpath, '\\', '/');
#elif defined __CYGWIN__
{
const int win_to_posix = CCP_WIN_A_TO_POSIX | CCP_RELATIVE;
size_t newsize = cygwin_conv_path(win_to_posix, libpath, 0, 0);
if (newsize > 0) {
VALUE rubylib = rb_str_new(0, newsize);
p = RSTRING_PTR(rubylib);
if (cygwin_conv_path(win_to_posix, libpath, p, newsize) == 0) {
rb_str_resize(sopath, 0);
sopath = rubylib;
libpath = p;
}
}
}
#endif
p = strrchr(libpath, '/');
if (p) {
static const char bindir[] = "/bin";
#ifdef LIBDIR_BASENAME
static const char libdir[] = "/"LIBDIR_BASENAME;
#else
static const char libdir[] = "/lib";
#endif
const ptrdiff_t bindir_len = (ptrdiff_t)sizeof(bindir) - 1;
const ptrdiff_t libdir_len = (ptrdiff_t)sizeof(libdir) - 1;
#ifdef ENABLE_MULTIARCH
char *p2 = NULL;
multiarch:
#endif
if (p - libpath >= bindir_len && !STRNCASECMP(p - bindir_len, bindir, bindir_len)) {
p -= bindir_len;
}
else if (p - libpath >= libdir_len && !strncmp(p - libdir_len, libdir, libdir_len)) {
p -= libdir_len;
}
#ifdef ENABLE_MULTIARCH
else if (p2) {
p = p2;
}
else {
p2 = p;
p = rb_enc_path_last_separator(libpath, p, rb_ascii8bit_encoding());
if (p) goto multiarch;
p = p2;
}
#endif
#if !VARIABLE_LIBPATH
*p = 0;
#endif
}
#if !VARIABLE_LIBPATH
else {
strlcpy(libpath, ".", sizeof(libpath));
p = libpath + 1;
}
baselen = p - libpath;
#define PREFIX_PATH() rb_str_new(libpath, baselen)
#else
baselen = p - libpath;
rb_str_resize(sopath, baselen);
libpath = RSTRING_PTR(sopath);
#define PREFIX_PATH() sopath
#endif
#define BASEPATH() rb_str_buf_cat(rb_str_buf_new(baselen+len), libpath, baselen)
#define RUBY_RELATIVE(path, len) rb_str_buf_cat(BASEPATH(), (path), (len))
#else
const size_t exec_prefix_len = strlen(ruby_exec_prefix);
#define RUBY_RELATIVE(path, len) rubylib_path_new((path), (len))
#define PREFIX_PATH() RUBY_RELATIVE(ruby_exec_prefix, exec_prefix_len)
#endif
load_path = GET_VM()->load_path;
if (safe_level == 0) {
ruby_push_include(getenv("RUBYLIB"), identical_path);
}
id_initial_load_path_mark = rb_intern_const("@gem_prelude_index");
while (*paths) {
size_t len = strlen(paths);
VALUE path = RUBY_RELATIVE(paths, len);
rb_ivar_set(path, id_initial_load_path_mark, path);
rb_ary_push(load_path, path);
paths += len + 1;
}
rb_const_set(rb_cObject, rb_intern_const("TMP_RUBY_PREFIX"), rb_obj_freeze(PREFIX_PATH()));
}
static void
add_modules(VALUE *req_list, const char *mod)
{
VALUE list = *req_list;
VALUE feature;
if (!list) {
*req_list = list = rb_ary_new();
RBASIC_CLEAR_CLASS(list);
}
feature = rb_str_new2(mod);
RBASIC_CLEAR_CLASS(feature);
rb_ary_push(list, feature);
}
static void
require_libraries(VALUE *req_list)
{
VALUE list = *req_list;
VALUE self = rb_vm_top_self();
ID require;
rb_thread_t *th = GET_THREAD();
rb_encoding *extenc = rb_default_external_encoding();
int prev_parse_in_eval = th->parse_in_eval;
th->parse_in_eval = 0;
CONST_ID(require, "require");
while (list && RARRAY_LEN(list) > 0) {
VALUE feature = rb_ary_shift(list);
rb_enc_associate(feature, extenc);
RBASIC_SET_CLASS_RAW(feature, rb_cString);
OBJ_FREEZE(feature);
rb_funcall2(self, require, 1, &feature);
}
*req_list = 0;
th->parse_in_eval = prev_parse_in_eval;
}
static rb_env_t*
toplevel_context(VALUE toplevel_binding)
{
rb_env_t *env;
rb_binding_t *bind;
GetBindingPtr(toplevel_binding, bind);
GetEnvPtr(bind->env, env);
return env;
}
static void
process_sflag(int *sflag)
{
if (*sflag > 0) {
long n;
const VALUE *args;
VALUE argv = rb_argv;
n = RARRAY_LEN(argv);
args = RARRAY_CONST_PTR(argv);
while (n > 0) {
VALUE v = *args++;
char *s = StringValuePtr(v);
char *p;
int hyphen = FALSE;
if (s[0] != '-')
break;
n--;
if (s[1] == '-' && s[2] == '\0')
break;
v = Qtrue;
/* check if valid name before replacing - with _ */
for (p = s + 1; *p; p++) {
if (*p == '=') {
*p++ = '\0';
v = rb_str_new2(p);
break;
}
if (*p == '-') {
hyphen = TRUE;
}
else if (*p != '_' && !ISALNUM(*p)) {
VALUE name_error[2];
name_error[0] =
rb_str_new2("invalid name for global variable - ");
if (!(p = strchr(p, '='))) {
rb_str_cat2(name_error[0], s);
}
else {
rb_str_cat(name_error[0], s, p - s);
}
name_error[1] = args[-1];
rb_exc_raise(rb_class_new_instance(2, name_error, rb_eNameError));
}
}
s[0] = '$';
if (hyphen) {
for (p = s + 1; *p; ++p) {
if (*p == '-')
*p = '_';
}
}
rb_gv_set(s, v);
}
n = RARRAY_LEN(argv) - n;
while (n--) {
rb_ary_shift(argv);
}
*sflag = -1;
}
}
static long proc_options(long argc, char **argv, struct cmdline_options *opt, int envopt);
static void
moreswitches(const char *s, struct cmdline_options *opt, int envopt)
{
long argc, i, len;
char **argv, *p;
const char *ap = 0;
VALUE argstr, argary;
while (ISSPACE(*s)) s++;
if (!*s) return;
argstr = rb_str_tmp_new((len = strlen(s)) + 2);
argary = rb_str_tmp_new(0);
p = RSTRING_PTR(argstr);
*p++ = ' ';
memcpy(p, s, len + 1);
ap = 0;
rb_str_cat(argary, (char *)&ap, sizeof(ap));
while (*p) {
ap = p;
rb_str_cat(argary, (char *)&ap, sizeof(ap));
while (*p && !ISSPACE(*p)) ++p;
if (!*p) break;
*p++ = '\0';
while (ISSPACE(*p)) ++p;
}
argc = RSTRING_LEN(argary) / sizeof(ap);
ap = 0;
rb_str_cat(argary, (char *)&ap, sizeof(ap));
argv = (char **)RSTRING_PTR(argary);
while ((i = proc_options(argc, argv, opt, envopt)) > 1 && (argc -= i) > 0) {
argv += i;
if (**argv != '-') {
*--*argv = '-';
}
if ((*argv)[1]) {
++argc;
--argv;
}
}
/* get rid of GC */
rb_str_resize(argary, 0);
rb_str_resize(argstr, 0);
}
#define NAME_MATCH_P(name, str, len) \
((len) < (int)sizeof(name) && strncmp((str), (name), (len)) == 0)
#define UNSET_WHEN(name, bit, str, len) \
if (NAME_MATCH_P((name), (str), (len))) { \
*(unsigned int *)arg &= ~(bit); \
return; \
}
#define SET_WHEN(name, bit, str, len) \
if (NAME_MATCH_P((name), (str), (len))) { \
*(unsigned int *)arg |= (bit); \
return; \
}
static void
enable_option(const char *str, int len, void *arg)
{
#define UNSET_WHEN_DISABLE(bit) UNSET_WHEN(#bit, DISABLE_BIT(bit), str, len)
UNSET_WHEN_DISABLE(gems);
UNSET_WHEN_DISABLE(rubyopt);
if (NAME_MATCH_P("all", str, len)) {
*(unsigned int *)arg = 0U;
return;
}
rb_warn("unknown argument for --enable: `%.*s'", len, str);
}
static void
disable_option(const char *str, int len, void *arg)
{
#define SET_WHEN_DISABLE(bit) SET_WHEN(#bit, DISABLE_BIT(bit), str, len)
SET_WHEN_DISABLE(gems);
SET_WHEN_DISABLE(rubyopt);
if (NAME_MATCH_P("all", str, len)) {
*(unsigned int *)arg = ~0U;
return;
}
rb_warn("unknown argument for --disable: `%.*s'", len, str);
}
static void
dump_option(const char *str, int len, void *arg)
{
#define SET_WHEN_DUMP(bit) SET_WHEN(#bit, DUMP_BIT(bit), str, len)
SET_WHEN_DUMP(version);
SET_WHEN_DUMP(copyright);
SET_WHEN_DUMP(usage);
SET_WHEN_DUMP(help);
SET_WHEN_DUMP(yydebug);
SET_WHEN_DUMP(syntax);
SET_WHEN_DUMP(parsetree);
SET_WHEN_DUMP(parsetree_with_comment);
SET_WHEN_DUMP(insns);
rb_warn("don't know how to dump `%.*s',", len, str);
rb_warn("but only [version, copyright, usage, yydebug, syntax, parsetree, parsetree_with_comment, insns].");
}
static void
set_option_encoding_once(const char *type, VALUE *name, const char *e, long elen)
{
VALUE ename;
if (!elen) elen = strlen(e);
ename = rb_str_new(e, elen);
if (*name &&
rb_funcall(ename, rb_intern("casecmp"), 1, *name) != INT2FIX(0)) {
rb_raise(rb_eRuntimeError,
"%s already set to %"PRIsVALUE, type, *name);
}
*name = ename;
}
#define set_internal_encoding_once(opt, e, elen) \
set_option_encoding_once("default_internal", &(opt)->intern.enc.name, (e), (elen))
#define set_external_encoding_once(opt, e, elen) \
set_option_encoding_once("default_external", &(opt)->ext.enc.name, (e), (elen))
#define set_source_encoding_once(opt, e, elen) \
set_option_encoding_once("source", &(opt)->src.enc.name, (e), (elen))
static long
proc_options(long argc, char **argv, struct cmdline_options *opt, int envopt)
{
long n, argc0 = argc;
const char *s;
if (argc == 0)
return 0;
for (argc--, argv++; argc > 0; argc--, argv++) {
const char *const arg = argv[0];
if (!arg || arg[0] != '-' || !arg[1])
break;
s = arg + 1;
reswitch:
switch (*s) {
case 'a':
if (envopt) goto noenvopt;
opt->do_split = TRUE;
s++;
goto reswitch;
case 'p':
if (envopt) goto noenvopt;
opt->do_print = TRUE;
/* through */
case 'n':
if (envopt) goto noenvopt;
opt->do_loop = TRUE;
s++;
goto reswitch;
case 'd':
ruby_debug = Qtrue;
ruby_verbose = Qtrue;
s++;
goto reswitch;
case 'y':
if (envopt) goto noenvopt;
opt->dump |= DUMP_BIT(yydebug);
s++;
goto reswitch;
case 'v':
if (opt->verbose) {
s++;
goto reswitch;
}
opt->dump |= DUMP_BIT(version_v);
opt->verbose = 1;
case 'w':
ruby_verbose = Qtrue;
s++;
goto reswitch;
case 'W':
{
size_t numlen;
int v = 2; /* -W as -W2 */
if (*++s) {
v = scan_oct(s, 1, &numlen);
if (numlen == 0)
v = 1;
s += numlen;
}
switch (v) {
case 0:
ruby_verbose = Qnil;
break;
case 1:
ruby_verbose = Qfalse;
break;
default:
ruby_verbose = Qtrue;
break;
}
}
goto reswitch;
case 'c':
if (envopt) goto noenvopt;
opt->dump |= DUMP_BIT(syntax);
s++;
goto reswitch;
case 's':
if (envopt) goto noenvopt;
forbid_setid("-s");
if (!opt->sflag) opt->sflag = 1;
s++;
goto reswitch;
case 'h':
if (envopt) goto noenvopt;
opt->dump |= DUMP_BIT(usage);
goto switch_end;
case 'l':
if (envopt) goto noenvopt;
opt->do_line = TRUE;
rb_output_rs = rb_rs;
s++;
goto reswitch;
case 'S':
if (envopt) goto noenvopt;
forbid_setid("-S");
opt->do_search = TRUE;
s++;
goto reswitch;
case 'e':
if (envopt) goto noenvopt;
forbid_setid("-e");
if (!*++s) {
if (!--argc)
rb_raise(rb_eRuntimeError, "no code specified for -e");
s = *++argv;
}
if (!opt->e_script) {
opt->e_script = rb_str_new(0, 0);
if (opt->script == 0)
opt->script = "-e";
}
rb_str_cat2(opt->e_script, s);
rb_str_cat2(opt->e_script, "\n");
break;
case 'r':
forbid_setid("-r");
if (*++s) {
add_modules(&opt->req_list, s);
}
else if (argc > 1) {
add_modules(&opt->req_list, argv[1]);
argc--, argv++;
}
break;
case 'i':
if (envopt) goto noenvopt;
forbid_setid("-i");
ruby_set_inplace_mode(s + 1);
break;
case 'x':
if (envopt) goto noenvopt;
opt->xflag = TRUE;
s++;
if (*s && chdir(s) < 0) {
rb_fatal("Can't chdir to %s", s);
}
break;
case 'C':
case 'X':
if (envopt) goto noenvopt;
if (!*++s && (!--argc || !(s = *++argv) || !*s)) {
rb_fatal("Can't chdir");
}
if (chdir(s) < 0) {
rb_fatal("Can't chdir to %s", s);
}
break;
case 'F':
if (envopt) goto noenvopt;
if (*++s) {
rb_fs = rb_reg_new(s, strlen(s), 0);
}
break;
case 'E':
if (!*++s && (!--argc || !(s = *++argv))) {
rb_raise(rb_eRuntimeError, "missing argument for -E");
}
goto encoding;
case 'U':
set_internal_encoding_once(opt, "UTF-8", 0);
++s;
goto reswitch;
case 'K':
if (*++s) {
const char *enc_name = 0;
switch (*s) {
case 'E': case 'e':
enc_name = "EUC-JP";
break;
case 'S': case 's':
enc_name = "Windows-31J";
break;
case 'U': case 'u':
enc_name = "UTF-8";
break;
case 'N': case 'n': case 'A': case 'a':
enc_name = "ASCII-8BIT";
break;
}
if (enc_name) {
opt->src.enc.name = rb_str_new2(enc_name);
if (!opt->ext.enc.name)
opt->ext.enc.name = opt->src.enc.name;
}
s++;
}
goto reswitch;
case 'T':
{
size_t numlen;
int v = 1;
if (*++s) {
v = scan_oct(s, 2, &numlen);
if (numlen == 0)
v = 1;
s += numlen;
}
if (v > opt->safe_level) opt->safe_level = v;
}
goto reswitch;
case 'I':
forbid_setid("-I");
if (*++s)
ruby_incpush_expand(s);
else if (argc > 1) {
ruby_incpush_expand(argv[1]);
argc--, argv++;
}
break;
case '0':
if (envopt) goto noenvopt;
{
size_t numlen;
int v;
char c;
v = scan_oct(s, 4, &numlen);
s += numlen;
if (v > 0377)
rb_rs = Qnil;
else if (v == 0 && numlen >= 2) {
rb_rs = rb_str_new2("\n\n");