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ruby/ruby.c

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48 KiB
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 "ruby/ruby.h"
#include "ruby/encoding.h"
#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);
}
#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;
}
#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;
extern const char ruby_initial_load_paths[];
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
*p = 0;
}
#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
extern const char ruby_exec_prefix[];
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");
}
else {
c = v & 0xff;
rb_rs = rb_str_new(&c, 1);
}
}
goto reswitch;
case '-':
if (!s[1] || (s[1] == '\r' && !s[2])) {
argc--, argv++;
goto switch_end;
}
s++;
# define is_option_end(c, allow_hyphen) \
(!(c) || ((allow_hyphen) && (c) == '-') || (c) == '=')
# define check_envopt(name, allow_envopt) \
(((allow_envopt) || !envopt) ? (void)0 : \
rb_raise(rb_eRuntimeError, "invalid switch in RUBYOPT: --" name))
# define need_argument(name, s, needs_arg) \
((*(s)++ ? !*(s) : (!--argc || !((s) = *++argv))) && (needs_arg) ? \
rb_raise(rb_eRuntimeError, "missing argument for --" name) \
: (void)0)
# define is_option_with_arg(name, allow_hyphen, allow_envopt) \
is_option_with_optarg(name, allow_hyphen, allow_envopt, Qtrue)
# define is_option_with_optarg(name, allow_hyphen, allow_envopt, needs_arg) \
(strncmp((name), s, n = sizeof(name) - 1) == 0 && is_option_end(s[n], (allow_hyphen)) ? \
(check_envopt(name, (allow_envopt)), s += n, \
need_argument(name, s, needs_arg), 1) : 0)
if (strcmp("copyright", s) == 0) {
if (envopt) goto noenvopt_long;
opt->dump |= DUMP_BIT(copyright);
}
else if (strcmp("debug", s) == 0) {
ruby_debug = Qtrue;
ruby_verbose = Qtrue;
}
else if (is_option_with_arg("enable", Qtrue, Qtrue)) {
ruby_each_words(s, enable_option, &opt->disable);
}
else if (is_option_with_arg("disable", Qtrue, Qtrue)) {
ruby_each_words(s, disable_option, &opt->disable);
}
else if (is_option_with_arg("encoding", Qfalse, Qtrue)) {
char *p;
encoding:
do {
# define set_encoding_part(type) \
if (!(p = strchr(s, ':'))) { \
set_##type##_encoding_once(opt, s, 0); \
break; \
} \
else if (p > s) { \
set_##type##_encoding_once(opt, s, p-s); \
}
set_encoding_part(external);
if (!*(s = ++p)) break;
set_encoding_part(internal);
if (!*(s = ++p)) break;
#if defined ALLOW_DEFAULT_SOURCE_ENCODING && ALLOW_DEFAULT_SOURCE_ENCODING
set_encoding_part(source);
if (!*(s = ++p)) break;
#endif
rb_raise(rb_eRuntimeError, "extra argument for %s: %s",
(arg[1] == '-' ? "--encoding" : "-E"), s);
# undef set_encoding_part
} while (0);
}
else if (is_option_with_arg("internal-encoding", Qfalse, Qtrue)) {
set_internal_encoding_once(opt, s, 0);
}
else if (is_option_with_arg("external-encoding", Qfalse, Qtrue)) {
set_external_encoding_once(opt, s, 0);
}
#if defined ALLOW_DEFAULT_SOURCE_ENCODING && ALLOW_DEFAULT_SOURCE_ENCODING
else if (is_option_with_arg("source-encoding", Qfalse, Qtrue)) {
set_source_encoding_once(opt, s, 0);
}
#endif
else if (strcmp("version", s) == 0) {
if (envopt) goto noenvopt_long;
opt->dump |= DUMP_BIT(version);
}
else if (strcmp("verbose", s) == 0) {
opt->verbose = 1;
ruby_verbose = Qtrue;
}
else if (strcmp("yydebug", s) == 0) {
if (envopt) goto noenvopt_long;
opt->dump |= DUMP_BIT(yydebug);
}
else if (is_option_with_arg("dump", Qfalse, Qfalse)) {
ruby_each_words(s, dump_option, &opt->dump);
}
else if (strcmp("help", s) == 0) {
if (envopt) goto noenvopt_long;
opt->dump |= DUMP_BIT(help);
goto switch_end;
}
else {
rb_raise(rb_eRuntimeError,
"invalid option --%s (-h will show valid options)", s);
}
break;
case '\r':
if (!s[1])
break;
default:
{
if (ISPRINT(*s)) {
rb_raise(rb_eRuntimeError,
"invalid option -%c (-h will show valid options)",
(int)(unsigned char)*s);
}
else {
rb_raise(rb_eRuntimeError,
"invalid option -\\x%02X (-h will show valid options)",
(int)(unsigned char)*s);
}
}
goto switch_end;
noenvopt:
/* "EIdvwWrKU" only */
rb_raise(rb_eRuntimeError, "invalid switch in RUBYOPT: -%c", *s);
break;
noenvopt_long:
rb_raise(rb_eRuntimeError, "invalid switch in RUBYOPT: --%s", s);
break;
case 0:
break;
# undef is_option_end
# undef check_envopt
# undef need_argument
# undef is_option_with_arg
# undef is_option_with_optarg
}
}
switch_end:
return argc0 - argc;
}
static void
ruby_init_prelude(void)
{
Init_prelude();
rb_const_remove(rb_cObject, rb_intern_const("TMP_RUBY_PREFIX"));
}
static int
opt_enc_index(VALUE enc_name)
{
const char *s = RSTRING_PTR(enc_name);
int i = rb_enc_find_index(s);
if (i < 0) {
rb_raise(rb_eRuntimeError, "unknown encoding name - %s", s);
}
else if (rb_enc_dummy_p(rb_enc_from_index(i))) {
rb_raise(rb_eRuntimeError, "dummy encoding is not acceptable - %s ", s);
}
return i;
}
#define rb_progname (GET_VM()->progname)
#define rb_orig_progname (GET_VM()->orig_progname)
VALUE rb_argv0;
static VALUE
false_value(void)
{
return Qfalse;
}
static VALUE
true_value(void)
{
return Qtrue;
}
#define rb_define_readonly_boolean(name, val) \
rb_define_virtual_variable((name), (val) ? true_value : false_value, 0)
static VALUE
uscore_get(void)
{
VALUE line;
line = rb_lastline_get();
if (!RB_TYPE_P(line, T_STRING)) {
rb_raise(rb_eTypeError, "$_ value need to be String (%s given)",
NIL_P(line) ? "nil" : rb_obj_classname(line));
}
return line;
}
/*
* call-seq:
* sub(pattern, replacement) -> $_
* sub(pattern) {|...| block } -> $_
*
* Equivalent to <code>$_.sub(<i>args</i>)</code>, except that
* <code>$_</code> will be updated if substitution occurs.
* Available only when -p/-n command line option specified.
*/
static VALUE
rb_f_sub(int argc, VALUE *argv)
{
VALUE str = rb_funcall_passing_block(uscore_get(), rb_intern("sub"), argc, argv);
rb_lastline_set(str);
return str;
}
/*
* call-seq:
* gsub(pattern, replacement) -> $_
* gsub(pattern) {|...| block } -> $_
*
* Equivalent to <code>$_.gsub...</code>, except that <code>$_</code>
* will be updated if substitution occurs.
* Available only when -p/-n command line option specified.
*
*/
static VALUE
rb_f_gsub(int argc, VALUE *argv)
{
VALUE str = rb_funcall_passing_block(uscore_get(), rb_intern("gsub"), argc, argv);
rb_lastline_set(str);
return str;
}
/*
* call-seq:
* chop -> $_
*
* Equivalent to <code>($_.dup).chop!</code>, except <code>nil</code>
* is never returned. See <code>String#chop!</code>.
* Available only when -p/-n command line option specified.
*
*/
static VALUE
rb_f_chop(void)
{
VALUE str = rb_funcall_passing_block(uscore_get(), rb_intern("chop"), 0, 0);
rb_lastline_set(str);
return str;
}
/*
* call-seq:
* chomp -> $_
* chomp(string) -> $_
*
* Equivalent to <code>$_ = $_.chomp(<em>string</em>)</code>. See
* <code>String#chomp</code>.
* Available only when -p/-n command line option specified.
*
*/
static VALUE
rb_f_chomp(int argc, VALUE *argv)
{
VALUE str = rb_funcall_passing_block(uscore_get(), rb_intern("chomp"), argc, argv);
rb_lastline_set(str);
return str;
}
/* blank function in dmyext.c or generated by enc/make_encmake.rb */
extern void Init_enc(void);
static VALUE
process_options(int argc, char **argv, struct cmdline_options *opt)
{
NODE *tree = 0;
VALUE parser;
VALUE iseq;
rb_encoding *enc, *lenc;
const char *s;
char fbuf[MAXPATHLEN];
int i = (int)proc_options(argc, argv, opt, 0);
rb_thread_t *th = GET_THREAD();
VALUE toplevel_binding = Qundef;
argc -= i;
argv += i;
if (opt->dump & (DUMP_BIT(usage)|DUMP_BIT(help))) {
usage(origarg.argv[0], (opt->dump & DUMP_BIT(help)));
return Qtrue;
}
if (!(opt->disable & DISABLE_BIT(rubyopt)) &&
opt->safe_level == 0 && (s = getenv("RUBYOPT"))) {
VALUE src_enc_name = opt->src.enc.name;
VALUE ext_enc_name = opt->ext.enc.name;
VALUE int_enc_name = opt->intern.enc.name;
opt->src.enc.name = opt->ext.enc.name = opt->intern.enc.name = 0;
moreswitches(s, opt, 1);
if (src_enc_name)
opt->src.enc.name = src_enc_name;
if (ext_enc_name)
opt->ext.enc.name = ext_enc_name;
if (int_enc_name)
opt->intern.enc.name = int_enc_name;
}
if (opt->src.enc.name)
rb_warning("-K is specified; it is for 1.8 compatibility and may cause odd behavior");
if (opt->dump & (DUMP_BIT(version) | DUMP_BIT(version_v))) {
ruby_show_version();
if (opt->dump & DUMP_BIT(version)) return Qtrue;
}
if (opt->dump & DUMP_BIT(copyright)) {
ruby_show_copyright();
}
if (opt->safe_level >= 4) {
OBJ_TAINT(rb_argv);
OBJ_TAINT(GET_VM()->load_path);
}
if (!opt->e_script) {
if (argc == 0) { /* no more args */
if (opt->verbose)
return Qtrue;
opt->script = "-";
}
else {
opt->script = argv[0];
if (!opt->script || opt->script[0] == '\0') {
opt->script = "-";
}
else if (opt->do_search) {
char *path = getenv("RUBYPATH");
opt->script = 0;
if (path) {
opt->script = dln_find_file_r(argv[0], path, fbuf, sizeof(fbuf));
}
if (!opt->script) {
opt->script = dln_find_file_r(argv[0], getenv(PATH_ENV), fbuf, sizeof(fbuf));
}
if (!opt->script)
opt->script = argv[0];
}
argc--;
argv++;
}
}
opt->script_name = rb_str_new_cstr(opt->script);
opt->script = RSTRING_PTR(opt->script_name);
#if defined DOSISH || defined __CYGWIN__
translit_char(RSTRING_PTR(opt->script_name), '\\', '/');
#endif
ruby_gc_set_params(opt->safe_level);
ruby_init_loadpath_safe(opt->safe_level);
Init_enc();
rb_enc_find_index("encdb");
lenc = rb_locale_encoding();
rb_enc_associate(rb_progname, lenc);
rb_obj_freeze(rb_progname);
parser = rb_parser_new();
if (opt->dump & DUMP_BIT(yydebug)) {
rb_parser_set_yydebug(parser, Qtrue);
}
if (opt->ext.enc.name != 0) {
opt->ext.enc.index = opt_enc_index(opt->ext.enc.name);
}
if (opt->intern.enc.name != 0) {
opt->intern.enc.index = opt_enc_index(opt->intern.enc.name);
}
if (opt->src.enc.name != 0) {
opt->src.enc.index = opt_enc_index(opt->src.enc.name);
src_encoding_index = opt->src.enc.index;
}
if (opt->ext.enc.index >= 0) {
enc = rb_enc_from_index(opt->ext.enc.index);
}
else {
enc = lenc;
}
rb_enc_set_default_external(rb_enc_from_encoding(enc));
if (opt->intern.enc.index >= 0) {
enc = rb_enc_from_index(opt->intern.enc.index);
rb_enc_set_default_internal(rb_enc_from_encoding(enc));
opt->intern.enc.index = -1;
}
rb_enc_associate(opt->script_name, lenc);
rb_obj_freeze(opt->script_name);
{
long i;
VALUE load_path = GET_VM()->load_path;
for (i = 0; i < RARRAY_LEN(load_path); ++i) {
RARRAY_ASET(load_path, i,
rb_enc_associate(rb_str_dup(RARRAY_AREF(load_path, i)), lenc));
}
}
Init_ext(); /* load statically linked extensions before rubygems */
if (!(opt->disable & DISABLE_BIT(gems))) {
rb_define_module("Gem");
}
ruby_init_prelude();
ruby_set_argv(argc, argv);
process_sflag(&opt->sflag);
toplevel_binding = rb_const_get(rb_cObject, rb_intern("TOPLEVEL_BINDING"));
#define PREPARE_PARSE_MAIN(expr) do { \
rb_env_t *env = toplevel_context(toplevel_binding); \
th->parse_in_eval--; \
th->base_block = &env->block; \
expr; \
th->parse_in_eval++; \
th->base_block = 0; \
} while (0)
if (opt->e_script) {
VALUE progname = rb_progname;
rb_encoding *eenc;
if (opt->src.enc.index >= 0) {
eenc = rb_enc_from_index(opt->src.enc.index);
}
else {
eenc = lenc;
}
rb_enc_associate(opt->e_script, eenc);
ruby_set_script_name(opt->script_name);
require_libraries(&opt->req_list);
ruby_set_script_name(progname);
PREPARE_PARSE_MAIN({
tree = rb_parser_compile_string(parser, opt->script, opt->e_script, 1);
});
}
else {
if (opt->script[0] == '-' && !opt->script[1]) {
forbid_setid("program input from stdin");
}
PREPARE_PARSE_MAIN({
tree = load_file(parser, opt->script_name, 1, opt);
});
}
ruby_set_script_name(opt->script_name);
if (opt->dump & DUMP_BIT(yydebug)) return Qtrue;
if (opt->ext.enc.index >= 0) {
enc = rb_enc_from_index(opt->ext.enc.index);
}
else {
enc = lenc;
}
rb_enc_set_default_external(rb_enc_from_encoding(enc));
if (opt->intern.enc.index >= 0) {
/* Set in the shebang line */
enc = rb_enc_from_index(opt->intern.enc.index);
rb_enc_set_default_internal(rb_enc_from_encoding(enc));
}
else if (!rb_default_internal_encoding())
/* Freeze default_internal */
rb_enc_set_default_internal(Qnil);
rb_stdio_set_default_encoding();
if (!tree) return Qfalse;
process_sflag(&opt->sflag);
opt->xflag = 0;
if (opt->safe_level >= 4) {
FL_UNSET(rb_argv, FL_TAINT);
FL_UNSET(GET_VM()->load_path, FL_TAINT);
}
if (opt->dump & DUMP_BIT(syntax)) {
printf("Syntax OK\n");
return Qtrue;
}
if (opt->do_print) {
PREPARE_PARSE_MAIN({
tree = rb_parser_append_print(parser, tree);
});
}
if (opt->do_loop) {
PREPARE_PARSE_MAIN({
tree = rb_parser_while_loop(parser, tree, opt->do_line, opt->do_split);
});
rb_define_global_function("sub", rb_f_sub, -1);
rb_define_global_function("gsub", rb_f_gsub, -1);
rb_define_global_function("chop", rb_f_chop, 0);
rb_define_global_function("chomp", rb_f_chomp, -1);
}
if (opt->dump & DUMP_BIT(parsetree) || opt->dump & DUMP_BIT(parsetree_with_comment)) {
rb_io_write(rb_stdout, rb_parser_dump_tree(tree, opt->dump & DUMP_BIT(parsetree_with_comment)));
rb_io_flush(rb_stdout);
return Qtrue;
}
PREPARE_PARSE_MAIN({
VALUE path = Qnil;
if (!opt->e_script && strcmp(opt->script, "-")) {
path = rb_realpath_internal(Qnil, opt->script_name, 1);
}
iseq = rb_iseq_new_main(tree, opt->script_name, path);
});
if (opt->dump & DUMP_BIT(insns)) {
rb_io_write(rb_stdout, rb_iseq_disasm(iseq));
rb_io_flush(rb_stdout);
return Qtrue;
}
rb_define_readonly_boolean("$-p", opt->do_print);
rb_define_readonly_boolean("$-l", opt->do_line);
rb_define_readonly_boolean("$-a", opt->do_split);
rb_set_safe_level(opt->safe_level);
return iseq;
}
struct load_file_arg {
VALUE parser;
VALUE fname;
int script;
struct cmdline_options *opt;
};
static VALUE
load_file_internal(VALUE arg)
{
extern VALUE rb_stdin;
struct load_file_arg *argp = (struct load_file_arg *)arg;
VALUE parser = argp->parser;
VALUE orig_fname = argp->fname;
VALUE fname_v = rb_str_encode_ospath(orig_fname);
const char *fname = StringValueCStr(fname_v);
int script = argp->script;
struct cmdline_options *opt = argp->opt;
VALUE f;
int line_start = 1;
NODE *tree = 0;
rb_encoding *enc;
ID set_encoding;
int xflag = 0;
if (strcmp(fname, "-") == 0) {
f = rb_stdin;
}
else {
int fd, mode = O_RDONLY;
#if defined DOSISH || defined __CYGWIN__
{
const char *ext = strrchr(fname, '.');
if (ext && STRCASECMP(ext, ".exe") == 0) {
mode |= O_BINARY;
xflag = 1;
}
}
#endif
if ((fd = rb_cloexec_open(fname, mode, 0)) < 0) {
rb_load_fail(fname_v, strerror(errno));
}
rb_update_max_fd(fd);
#if !defined DOSISH && !defined __CYGWIN__
{
struct stat st;
if (fstat(fd, &st) != 0)
rb_load_fail(fname_v, strerror(errno));
if (S_ISDIR(st.st_mode)) {
errno = EISDIR;
rb_load_fail(fname_v, strerror(EISDIR));
}
}
#endif
f = rb_io_fdopen(fd, mode, fname);
}
CONST_ID(set_encoding, "set_encoding");
if (script) {
VALUE c = 1; /* something not nil */
VALUE line;
char *p;
int no_src_enc = !opt->src.enc.name;
int no_ext_enc = !opt->ext.enc.name;
int no_int_enc = !opt->intern.enc.name;
enc = rb_ascii8bit_encoding();
rb_funcall(f, set_encoding, 1, rb_enc_from_encoding(enc));
if (xflag || opt->xflag) {
line_start--;
search_shebang:
forbid_setid("-x");
opt->xflag = FALSE;
while (!NIL_P(line = rb_io_gets(f))) {
line_start++;
if (RSTRING_LEN(line) > 2
&& RSTRING_PTR(line)[0] == '#'
&& RSTRING_PTR(line)[1] == '!') {
if ((p = strstr(RSTRING_PTR(line), "ruby")) != 0) {
goto start_read;
}
}
}
rb_loaderror("no Ruby script found in input");
}
c = rb_io_getbyte(f);
if (c == INT2FIX('#')) {
c = rb_io_getbyte(f);
if (c == INT2FIX('!')) {
line = rb_io_gets(f);
if (NIL_P(line))
return 0;
if ((p = strstr(RSTRING_PTR(line), "ruby")) == 0) {
/* not ruby script, assume -x flag */
goto search_shebang;
}
start_read:
p += 4;
RSTRING_PTR(line)[RSTRING_LEN(line) - 1] = '\0';
if (RSTRING_PTR(line)[RSTRING_LEN(line) - 2] == '\r')
RSTRING_PTR(line)[RSTRING_LEN(line) - 2] = '\0';
if ((p = strstr(p, " -")) != 0) {
moreswitches(p + 1, opt, 0);
}
/* push back shebang for pragma may exist in next line */
rb_io_ungetbyte(f, rb_str_new2("!\n"));
}
else if (!NIL_P(c)) {
rb_io_ungetbyte(f, c);
}
rb_io_ungetbyte(f, INT2FIX('#'));
if (no_src_enc && opt->src.enc.name) {
opt->src.enc.index = opt_enc_index(opt->src.enc.name);
src_encoding_index = opt->src.enc.index;
}
if (no_ext_enc && opt->ext.enc.name) {
opt->ext.enc.index = opt_enc_index(opt->ext.enc.name);
}
if (no_int_enc && opt->intern.enc.name) {
opt->intern.enc.index = opt_enc_index(opt->intern.enc.name);
}
}
else if (!NIL_P(c)) {
rb_io_ungetbyte(f, c);
}
else {
if (f != rb_stdin) rb_io_close(f);
f = Qnil;
}
ruby_set_script_name(opt->script_name);
require_libraries(&opt->req_list); /* Why here? unnatural */
}
if (opt->src.enc.index >= 0) {
enc = rb_enc_from_index(opt->src.enc.index);
}
else if (f == rb_stdin) {
enc = rb_locale_encoding();
}
else {
enc = rb_utf8_encoding();
}
if (NIL_P(f)) {
f = rb_str_new(0, 0);
rb_enc_associate(f, enc);
return (VALUE)rb_parser_compile_string_path(parser, orig_fname, f, line_start);
}
rb_funcall(f, set_encoding, 2, rb_enc_from_encoding(enc), rb_str_new_cstr("-"));
tree = rb_parser_compile_file_path(parser, orig_fname, f, line_start);
rb_funcall(f, set_encoding, 1, rb_parser_encoding(parser));
if (script && tree && rb_parser_end_seen_p(parser)) {
/*
* DATA is a File that contains the data section of the executed file.
* To create a data section use <tt>__END__</tt>:
*
* $ cat t.rb
* puts DATA.gets
* __END__
* hello world!
*
* $ ruby t.rb
* hello world!
*/
rb_define_global_const("DATA", f);
}
else if (f != rb_stdin) {
rb_io_close(f);
}
return (VALUE)tree;
}
static VALUE
restore_lineno(VALUE lineno)
{
return rb_gv_set("$.", lineno);
}
static NODE *
load_file(VALUE parser, VALUE fname, int script, struct cmdline_options *opt)
{
struct load_file_arg arg;
arg.parser = parser;
arg.fname = fname;
arg.script = script;
arg.opt = opt;
return (NODE *)rb_ensure(load_file_internal, (VALUE)&arg, restore_lineno, rb_gv_get("$."));
}
void *
rb_load_file(const char *fname)
{
VALUE fname_v = rb_str_new_cstr(fname);
return rb_load_file_str(fname_v);
}
void *
rb_load_file_str(VALUE fname_v)
{
struct cmdline_options opt;
return load_file(rb_parser_new(), fname_v, 0, cmdline_options_init(&opt));
}
/*
* call-seq:
* Process.argv0 -> frozen_string
*
* Returns the name of the script being executed. The value is not
* affected by assigning a new value to $0.
*
* This method first appeared in Ruby 2.1 to serve as a global
* variable free means to get the script name.
*/
static VALUE
proc_argv0(VALUE process)
{
return rb_orig_progname;
}
/*
* call-seq:
* Process.setproctitle(string) -> string
*
* Sets the process title that appears on the ps(1) command. Not
* necessarily effective on all platforms. No exception will be
* raised regardless of the result, nor will NotImplementedError be
* raised even if the platform does not support the feature.
*
* Calling this method does not affect the value of $0.
*
* Process.setproctitle('myapp: worker #%d' % worker_id)
*
* This method first appeared in Ruby 2.1 to serve as a global
* variable free means to change the process title.
*/
static VALUE
proc_setproctitle(VALUE process, VALUE title)
{
StringValue(title);
setproctitle("%.*s", RSTRING_LENINT(title), RSTRING_PTR(title));
return title;
}
static void
set_arg0(VALUE val, ID id)
{
if (origarg.argv == 0)
rb_raise(rb_eRuntimeError, "$0 not initialized");
rb_progname = rb_str_new_frozen(proc_setproctitle(rb_mProcess, val));
}
/*! Sets the current script name to this value.
*
* This is similar to <code>$0 = name</code> in Ruby level but also affects
* <code>Method#location</code> and others.
*/
void
ruby_script(const char *name)
{
if (name) {
rb_orig_progname = rb_progname = rb_external_str_new(name, strlen(name));
rb_vm_set_progname(rb_progname);
}
}
/*! Sets the current script name to this value.
*
* Same as ruby_script() but accepts a VALUE.
*/
void
ruby_set_script_name(VALUE name)
{
rb_orig_progname = rb_progname = rb_str_dup(name);
rb_vm_set_progname(rb_progname);
}
static void
init_ids(struct cmdline_options *opt)
{
rb_uid_t uid = getuid();
rb_uid_t euid = geteuid();
rb_gid_t gid = getgid();
rb_gid_t egid = getegid();
if (uid != euid) opt->setids |= 1;
if (egid != gid) opt->setids |= 2;
if (uid && opt->setids) {
if (opt->safe_level < 1) opt->safe_level = 1;
}
}
#undef forbid_setid
static void
forbid_setid(const char *s, struct cmdline_options *opt)
{
if (opt->setids & 1)
rb_raise(rb_eSecurityError, "no %s allowed while running setuid", s);
if (opt->setids & 2)
rb_raise(rb_eSecurityError, "no %s allowed while running setgid", s);
if (opt->safe_level > 0)
rb_raise(rb_eSecurityError, "no %s allowed in tainted mode", s);
}
static void
verbose_setter(VALUE val, ID id, void *data)
{
VALUE *variable = data;
*variable = RTEST(val) ? Qtrue : val;
}
static VALUE
opt_W_getter(ID id, void *data)
{
VALUE *variable = data;
switch (*variable) {
case Qnil:
return INT2FIX(0);
case Qfalse:
return INT2FIX(1);
case Qtrue:
return INT2FIX(2);
default:
return Qnil;
}
}
/*! Defines built-in variables */
void
ruby_prog_init(void)
{
rb_define_hooked_variable("$VERBOSE", &ruby_verbose, 0, verbose_setter);
rb_define_hooked_variable("$-v", &ruby_verbose, 0, verbose_setter);
rb_define_hooked_variable("$-w", &ruby_verbose, 0, verbose_setter);
rb_define_hooked_variable("$-W", &ruby_verbose, opt_W_getter, rb_gvar_readonly_setter);
rb_define_variable("$DEBUG", &ruby_debug);
rb_define_variable("$-d", &ruby_debug);
rb_define_hooked_variable("$0", &rb_progname, 0, set_arg0);
rb_define_hooked_variable("$PROGRAM_NAME", &rb_progname, 0, set_arg0);
rb_define_module_function(rb_mProcess, "argv0", proc_argv0, 0);
rb_define_module_function(rb_mProcess, "setproctitle", proc_setproctitle, 1);
/*
* ARGV contains the command line arguments used to run ruby with the
* first value containing the name of the executable.
*
* A library like OptionParser can be used to process command-line
* arguments.
*/
rb_define_global_const("ARGV", rb_argv);
}
void
ruby_set_argv(int argc, char **argv)
{
int i;
VALUE av = rb_argv;
#if defined(USE_DLN_A_OUT)
if (origarg.argv)
dln_argv0 = origarg.argv[0];
else
dln_argv0 = argv[0];
#endif
rb_ary_clear(av);
for (i = 0; i < argc; i++) {
VALUE arg = rb_external_str_new_cstr(argv[i]);
OBJ_FREEZE(arg);
rb_ary_push(av, arg);
}
}
void *
ruby_process_options(int argc, char **argv)
{
struct cmdline_options opt;
VALUE iseq;
const char *script_name = (argc > 0 && argv[0]) ? argv[0] : "ruby";
ruby_script(script_name); /* for the time being */
rb_argv0 = rb_str_new4(rb_progname);
rb_gc_register_mark_object(rb_argv0);
iseq = process_options(argc, argv, cmdline_options_init(&opt));
#ifndef HAVE_SETPROCTITLE
{
extern void ruby_init_setproctitle(int argc, char *argv[]);
ruby_init_setproctitle(argc, argv);
}
#endif
return (void*)(struct RData*)iseq;
}
static void
fill_standard_fds(void)
{
int f0, f1, f2, fds[2];
struct stat buf;
f0 = fstat(0, &buf) == -1 && errno == EBADF;
f1 = fstat(1, &buf) == -1 && errno == EBADF;
f2 = fstat(2, &buf) == -1 && errno == EBADF;
if (f0) {
if (pipe(fds) == 0) {
close(fds[1]);
if (fds[0] != 0) {
dup2(fds[0], 0);
close(fds[0]);
}
}
}
if (f1 || f2) {
if (pipe(fds) == 0) {
close(fds[0]);
if (f1 && fds[1] != 1)
dup2(fds[1], 1);
if (f2 && fds[1] != 2)
dup2(fds[1], 2);
if (fds[1] != 1 && fds[1] != 2)
close(fds[1]);
}
}
}
/*! Initializes the process for ruby(1).
*
* This function assumes this process is ruby(1) and it has just started.
* Usually programs that embeds CRuby interpreter should not call this function,
* and should do their own initialization.
*/
void
ruby_sysinit(int *argc, char ***argv)
{
#if defined(_WIN32)
void rb_w32_sysinit(int *argc, char ***argv);
rb_w32_sysinit(argc, argv);
#endif
origarg.argc = *argc;
origarg.argv = *argv;
#if defined(USE_DLN_A_OUT)
dln_argv0 = origarg.argv[0];
#endif
fill_standard_fds();
}
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