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ruby.c
1224 lines (1082 loc) · 25.7 KB
/
ruby.c
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/**********************************************************************
ruby.c -
$Author$
$Date$
created at: Tue Aug 10 12:47:31 JST 1993
Copyright (C) 1993-2003 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#ifdef __CYGWIN__
#include <windows.h>
#endif
#ifdef _WIN32_WCE
#include <winsock.h>
#include "wince.h"
#endif
#include "ruby.h"
#include "dln.h"
#include "node.h"
#include <stdio.h>
#include <sys/types.h>
#include <ctype.h>
#ifdef __hpux
#include <sys/pstat.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifndef MAXPATHLEN
# define MAXPATHLEN 1024
#endif
#include "util.h"
#ifndef HAVE_STDLIB_H
char *getenv();
#endif
VALUE ruby_debug = Qfalse;
VALUE ruby_verbose = Qfalse;
static int sflag = 0;
static int xflag = 0;
extern int ruby_yydebug;
char *ruby_inplace_mode = Qfalse;
static void load_stdin(void);
static void load_file(const char *, int);
static void forbid_setid(const char *);
static VALUE do_loop = Qfalse, do_print = Qfalse;
static VALUE do_check = Qfalse, do_line = Qfalse;
static VALUE do_split = Qfalse;
static int origargc;
static char **origargv;
static void
usage(const char *name)
{
/* This message really ought to be max 23 lines.
* Removed -h because the user already knows that option. Others? */
static const char *usage_msg[] = {
"-0[octal] specify record separator (\\0, if no argument)",
"-a autosplit mode with -n or -p (splits $_ into $F)",
"-c check syntax only",
"-Cdirectory cd to directory, before executing your script",
"-d set debugging flags (set $DEBUG to true)",
"-e 'command' one line of script. Several -e's allowed. Omit [programfile]",
"-Fpattern split() pattern for autosplit (-a)",
"-i[extension] edit ARGV files in place (make backup if extension supplied)",
"-Idirectory specify $LOAD_PATH directory (may be used more than once)",
"-Kkcode specifies KANJI (Japanese) code-set",
"-l enable line ending processing",
"-n assume 'while gets(); ... end' loop around your script",
"-p assume loop like -n but print line also like sed",
"-rlibrary require the library, before executing your script",
"-s enable some switch parsing for switches after script name",
"-S look for the script using PATH environment variable",
"-T[level] turn on tainting checks",
"-v print version number, then turn on verbose mode",
"-w turn warnings on for your script",
"-W[level] set warning level; 0=silence, 1=medium, 2=verbose (default)",
"-x[directory] strip off text before #!ruby line and perhaps cd to directory",
"--copyright print the copyright",
"--version print the version",
NULL
};
const char **p = usage_msg;
printf("Usage: %s [switches] [--] [programfile] [arguments]\n", name);
while (*p)
printf(" %s\n", *p++);
}
extern VALUE rb_load_path;
#define STATIC_FILE_LENGTH 255
#if defined _WIN32 || defined __CYGWIN__ || defined __DJGPP__
static char *
rubylib_mangle(const char *s, unsigned int l)
{
static char *newp, *oldp;
static int newl, oldl, notfound;
static char newsub[STATIC_FILE_LENGTH+1];
if (!newp && !notfound) {
newp = getenv("RUBYLIB_PREFIX");
if (newp) {
char *s;
oldp = newp;
while (*newp && !ISSPACE(*newp) && *newp != ';') {
newp++; oldl++; /* Skip digits. */
}
while (*newp && (ISSPACE(*newp) || *newp == ';')) {
newp++; /* Skip whitespace. */
}
newl = strlen(newp);
if (newl == 0 || oldl == 0 || newl > STATIC_FILE_LENGTH) {
rb_fatal("malformed RUBYLIB_PREFIX");
}
strcpy(newsub, newp);
s = newsub;
while (*s) {
if (*s == '\\') *s = '/';
s++;
}
}
else {
notfound = 1;
}
}
if (l == 0) {
l = strlen(s);
}
if (!newp || l < oldl || strncasecmp(oldp, s, oldl) != 0) {
static char ret[STATIC_FILE_LENGTH+1];
strncpy(ret, s, l);
ret[l] = 0;
return ret;
}
if (l + newl - oldl > STATIC_FILE_LENGTH || newl > STATIC_FILE_LENGTH) {
rb_fatal("malformed RUBYLIB_PREFIX");
}
strcpy(newsub + newl, s + oldl);
newsub[l + newl - oldl] = 0;
return newsub;
}
#define rubylib_mangled_path(s, l) rb_str_new2(rubylib_mangle((s), (l)))
#define rubylib_mangled_path2(s) rb_str_new2(rubylib_mangle((s), 0))
#else
#define rubylib_mangled_path(s, l) rb_str_new((s), (l))
#define rubylib_mangled_path2(s) rb_str_new2(s)
#endif
void
ruby_push_include(const char *path, VALUE (*filter) (VALUE))
{
const char sep = PATH_SEP_CHAR;
if (path == 0) return;
#if defined(__CYGWIN__)
{
char rubylib[FILENAME_MAX];
conv_to_posix_path(path, rubylib, FILENAME_MAX);
path = rubylib;
}
#endif
if (strchr(path, sep)) {
const char *p, *s;
VALUE ary = rb_ary_new();
p = path;
while (*p) {
while (*p == sep) p++;
if ((s = strchr(p, sep)) != 0) {
rb_ary_push(ary, (*filter)(rubylib_mangled_path(p, (int)(s-p))));
p = s + 1;
}
else {
rb_ary_push(ary, (*filter)(rubylib_mangled_path2(p)));
break;
}
}
rb_ary_concat(rb_load_path, ary);
}
else {
rb_ary_push(rb_load_path, (*filter)(rubylib_mangled_path2(path)));
}
}
static VALUE
identical_path(VALUE path)
{
return path;
}
void
ruby_incpush(const char *path)
{
ruby_push_include(path, identical_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 DOSISH || defined __CYGWIN__
#define LOAD_RELATIVE 1
#endif
#if defined DOSISH || defined __CYGWIN__
static inline void
translate_char(char *p, int from, int to)
{
while (*p) {
if ((unsigned char)*p == from)
*p = to;
#ifdef CharNext /* defined as CharNext[AW] on Windows. */
p = CharNext(p);
#else
p += mblen(p, RUBY_MBCHAR_MAXSIZE);
#endif
}
}
#endif
void
ruby_init_loadpath(void)
{
#if defined LOAD_RELATIVE
char libpath[MAXPATHLEN+1];
char *p;
int rest;
#if defined _WIN32 || defined __CYGWIN__
HMODULE libruby = NULL;
MEMORY_BASIC_INFORMATION m;
#ifndef _WIN32_WCE
memset(&m, 0, sizeof(m));
if (VirtualQuery(ruby_init_loadpath, &m, sizeof(m)) && m.State == MEM_COMMIT)
libruby = (HMODULE)m.AllocationBase;
#endif
GetModuleFileName(libruby, libpath, sizeof libpath);
#elif defined(DJGPP)
extern char *__dos_argv0;
strncpy(libpath, __dos_argv0, sizeof(libpath) - 1);
#elif defined(__human68k__)
extern char **_argv;
strncpy(libpath, _argv[0], sizeof(libpath) - 1);
#elif defined(__EMX__)
_execname(libpath, sizeof(libpath) - 1);
#endif
libpath[sizeof(libpath) - 1] = '\0';
#if defined DOSISH || defined __CYGWIN__
translate_char(libpath, '\\', '/');
#endif
p = strrchr(libpath, '/');
if (p) {
*p = 0;
if (p-libpath > 3 && !strcasecmp(p-4, "/bin")) {
p -= 4;
*p = 0;
}
}
else {
strcpy(libpath, ".");
p = libpath + 1;
}
rest = sizeof(libpath) - 1 - (p - libpath);
#define RUBY_RELATIVE(path) (strncpy(p, (path), rest), libpath)
#else
#define RUBY_RELATIVE(path) (path)
#endif
if (rb_safe_level() == 0) {
ruby_incpush(getenv("RUBYLIB"));
}
#ifdef RUBY_SEARCH_PATH
ruby_incpush(RUBY_RELATIVE(RUBY_SEARCH_PATH));
#endif
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_LIB2));
#ifdef RUBY_SITE_THIN_ARCHLIB
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_THIN_ARCHLIB));
#endif
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_ARCHLIB));
ruby_incpush(RUBY_RELATIVE(RUBY_SITE_LIB));
ruby_incpush(RUBY_RELATIVE(RUBY_LIB));
#ifdef RUBY_THIN_ARCHLIB
ruby_incpush(RUBY_RELATIVE(RUBY_THIN_ARCHLIB));
#endif
ruby_incpush(RUBY_RELATIVE(RUBY_ARCHLIB));
if (rb_safe_level() == 0) {
ruby_incpush(".");
}
}
struct req_list {
char *name;
struct req_list *next;
};
static struct req_list req_list_head, *req_list_last = &req_list_head;
static void
add_modules(const char *mod)
{
struct req_list *list;
list = ALLOC(struct req_list);
list->name = ALLOC_N(char, strlen(mod)+1);
strcpy(list->name, mod);
list->next = 0;
req_list_last->next = list;
req_list_last = list;
}
extern void Init_ext(void);
static void
require_libraries(void)
{
extern NODE *ruby_eval_tree;
NODE *save[3];
struct req_list *list = req_list_head.next;
struct req_list *tmp;
save[0] = ruby_eval_tree;
save[1] = NEW_BEGIN(0);
ruby_eval_tree = 0;
ruby_current_node = 0;
Init_ext(); /* should be called here for some reason :-( */
ruby_current_node = save[1];
ruby_set_current_source();
req_list_last = 0;
while (list) {
int state;
ruby_current_node = 0;
rb_protect((VALUE (*)(VALUE))rb_require, (VALUE)list->name, &state);
if (state) rb_jump_tag(state);
tmp = list->next;
free(list->name);
free(list);
list = tmp;
ruby_current_node = save[1];
ruby_set_current_source();
}
req_list_head.next = 0;
ruby_eval_tree = save[0];
rb_gc_force_recycle((VALUE)save[1]);
ruby_current_node = 0;
}
static void
process_sflag(void)
{
if (sflag) {
long n;
VALUE *args;
n = RARRAY_LEN(rb_argv);
args = RARRAY_PTR(rb_argv);
while (n > 0) {
VALUE v = *args++;
char *s = StringValuePtr(v);
char *p;
int hyphen = Qfalse;
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 = Qtrue;
}
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(rb_argv) - n;
while (n--) {
rb_ary_shift(rb_argv);
}
}
sflag = 0;
}
static void proc_options(int argc, char **argv);
static char*
moreswitches(const char *s)
{
int argc; char *argv[3];
const char *p = s;
argc = 2; argv[0] = argv[2] = 0;
while (*s && !ISSPACE(*s))
s++;
argv[1] = ALLOCA_N(char, s-p+2);
argv[1][0] = '-';
strncpy(argv[1]+1, p, s-p);
argv[1][s-p+1] = '\0';
proc_options(argc, argv);
while (*s && ISSPACE(*s))
s++;
return (char *)s;
}
NODE *ruby_eval_tree;
static void
proc_options(int argc, char **argv)
{
char *argv0 = argv[0];
int do_search;
const char *s;
char *script = 0;
NODE *volatile script_node = 0;
int version = 0;
int copyright = 0;
int verbose = 0;
VALUE e_script = Qfalse;
if (argc == 0) return;
do_search = Qfalse;
for (argc--,argv++; argc > 0; argc--,argv++) {
if (argv[0][0] != '-' || !argv[0][1]) break;
s = argv[0]+1;
reswitch:
switch (*s) {
case 'a':
do_split = Qtrue;
s++;
goto reswitch;
case 'p':
do_print = Qtrue;
/* through */
case 'n':
do_loop = Qtrue;
s++;
goto reswitch;
case 'd':
ruby_debug = Qtrue;
ruby_verbose = Qtrue;
s++;
goto reswitch;
case 'y':
ruby_yydebug = 1;
s++;
goto reswitch;
case 'v':
if (argv0 == 0 || verbose) {
s++;
goto reswitch;
}
ruby_show_version();
verbose = 1;
case 'w':
ruby_verbose = Qtrue;
s++;
goto reswitch;
case 'W':
{
int 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':
do_check = Qtrue;
s++;
goto reswitch;
case 's':
forbid_setid("-s");
sflag = 1;
s++;
goto reswitch;
case 'h':
usage(origargv[0]);
exit(0);
case 'l':
do_line = Qtrue;
rb_output_rs = rb_rs;
s++;
goto reswitch;
case 'S':
forbid_setid("-S");
do_search = Qtrue;
s++;
goto reswitch;
case 'e':
forbid_setid("-e");
if (!*++s) {
s = argv[1];
argc--,argv++;
}
if (!s) {
fprintf(stderr, "%s: no code specified for -e\n", origargv[0]);
exit(2);
}
if (!e_script) {
e_script = rb_str_new(0,0);
if (script == 0) script = "-e";
}
rb_str_cat2(e_script, s);
rb_str_cat2(e_script, "\n");
break;
case 'r':
forbid_setid("-r");
if (*++s) {
add_modules(s);
}
else if (argv[1]) {
add_modules(argv[1]);
argc--,argv++;
}
break;
case 'i':
forbid_setid("-i");
if (ruby_inplace_mode) free(ruby_inplace_mode);
ruby_inplace_mode = strdup(s+1);
break;
case 'x':
xflag = Qtrue;
s++;
if (*s && chdir(s) < 0) {
rb_fatal("Can't chdir to %s", s);
}
break;
case 'C':
case 'X':
s++;
if (!*s) {
s = argv[1];
argc--,argv++;
}
if (!s || !*s) {
rb_fatal("Can't chdir");
}
if (chdir(s) < 0) {
rb_fatal("Can't chdir to %s", s);
}
break;
case 'F':
if (*++s) {
rb_fs = rb_reg_new(s, strlen(s), 0);
}
break;
case 'K':
if (*++s) {
rb_set_kcode(s);
s++;
}
goto reswitch;
case 'T':
{
int numlen;
int v = 1;
if (*++s) {
v = scan_oct(s, 2, &numlen);
if (numlen == 0) v = 1;
s += numlen;
}
rb_set_safe_level(v);
}
goto reswitch;
case 'I':
forbid_setid("-I");
if (*++s)
ruby_incpush_expand(s);
else if (argv[1]) {
ruby_incpush_expand(argv[1]);
argc--,argv++;
}
break;
case '0':
{
int 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++;
if (strcmp("copyright", s) == 0)
copyright = 1;
else if (strcmp("debug", s) == 0) {
ruby_debug = Qtrue;
ruby_verbose = Qtrue;
}
else if (strcmp("version", s) == 0)
version = 1;
else if (strcmp("verbose", s) == 0) {
verbose = 1;
ruby_verbose = Qtrue;
}
else if (strcmp("yydebug", s) == 0)
ruby_yydebug = 1;
else if (strcmp("help", s) == 0) {
usage(origargv[0]);
exit(0);
}
else {
fprintf(stderr, "%s: invalid option --%s (-h will show valid options)\n",
origargv[0], s);
exit(2);
}
break;
case '\r':
if (!s[1]) break;
default:
{
const char *format;
if (ISPRINT(*s)) {
format = "%s: invalid option -%c (-h will show valid options)\n";
}
else {
format = "%s: invalid option -\\%03o (-h will show valid options)\n";
}
fprintf(stderr, format, origargv[0], (int)(unsigned char)*s);
}
exit(2);
case 0:
break;
}
}
switch_end:
if (argv0 == 0) return;
if (rb_safe_level() == 0 && (s = getenv("RUBYOPT"))) {
while (ISSPACE(*s)) s++;
if (*s == 'T' || (*s == '-' && *(s+1) == 'T')) {
int numlen;
int v = 1;
if (*s != 'T') ++s;
if (*++s) {
v = scan_oct(s, 2, &numlen);
if (numlen == 0) v = 1;
}
rb_set_safe_level(v);
}
else {
while (s && *s) {
if (*s == '-') {
s++;
if (ISSPACE(*s)) {
do {s++;} while (ISSPACE(*s));
continue;
}
}
if (!*s) break;
if (!strchr("IdvwrK", *s))
rb_raise(rb_eRuntimeError, "illegal switch in RUBYOPT: -%c", *s);
s = moreswitches(s);
}
}
}
if (version) {
ruby_show_version();
exit(0);
}
if (copyright) {
ruby_show_copyright();
}
if (rb_safe_level() >= 4) {
OBJ_TAINT(rb_argv);
OBJ_TAINT(rb_load_path);
}
if (!e_script) {
if (argc == 0) { /* no more args */
if (verbose) exit(0);
script = "-";
}
else {
script = argv[0];
if (script[0] == '\0') {
script = "-";
}
else if (do_search) {
char *path = getenv("RUBYPATH");
script = 0;
if (path) {
script = dln_find_file(argv[0], path);
}
if (!script) {
script = dln_find_file(argv[0], getenv(PATH_ENV));
}
if (!script) script = argv[0];
script = ruby_sourcefile = rb_source_filename(script);
script_node = NEW_BEGIN(0);
}
#if defined DOSISH || defined __CYGWIN__
/* assume that we can change argv[n] if never change its length. */
translate_char(script, '\\', '/');
#endif
argc--; argv++;
}
}
ruby_script(script);
ruby_set_argv(argc, argv);
process_sflag();
ruby_init_loadpath();
ruby_sourcefile = rb_source_filename(argv0);
if (e_script) {
require_libraries();
ruby_eval_tree = rb_compile_string(script, e_script, 1);
}
else if (strlen(script) == 1 && script[0] == '-') {
load_stdin();
}
else {
load_file(script, 1);
}
process_sflag();
xflag = 0;
if (rb_safe_level() >= 4) {
FL_UNSET(rb_argv, FL_TAINT);
FL_UNSET(rb_load_path, FL_TAINT);
}
}
static void
load_file(const char *fname, int script)
{
extern VALUE rb_stdin;
VALUE parser;
VALUE f;
int line_start = 1;
if (!fname) rb_load_fail(fname);
if (strcmp(fname, "-") == 0) {
f = rb_stdin;
}
else {
FILE *fp = fopen(fname, "r");
if (fp == NULL) {
rb_load_fail(fname);
}
fclose(fp);
f = rb_file_open(fname, "r");
#if defined DOSISH || defined __CYGWIN__
{
char *ext = strrchr(fname, '.');
if (ext && strcasecmp(ext, ".exe") == 0)
rb_io_binmode(f);
}
#endif
}
if (script) {
VALUE c = 1; /* something not nil */
VALUE line;
char *p;
if (xflag) {
forbid_setid("-x");
xflag = Qfalse;
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_raise(rb_eLoadError, "no Ruby script found in input");
}
c = rb_io_getc(f);
if (c == INT2FIX('#')) {
c = rb_io_getc(f);
if (c == INT2FIX('!')) {
line = rb_io_gets(f);
if (NIL_P(line)) return;
if ((p = strstr(RSTRING_PTR(line), "ruby")) == 0) {
/* not ruby script, kick the program */
char **argv;
char *path;
char *pend = RSTRING_PTR(line) + RSTRING_LEN(line);
p = RSTRING_PTR(line); /* skip `#!' */
if (pend[-1] == '\n') pend--; /* chomp line */
if (pend[-1] == '\r') pend--;
*pend = '\0';
while (p < pend && ISSPACE(*p))
p++;
path = p; /* interpreter path */
while (p < pend && !ISSPACE(*p))
p++;
*p++ = '\0';
if (p < pend) {
argv = ALLOCA_N(char*, origargc+3);
argv[1] = p;
MEMCPY(argv+2, origargv+1, char*, origargc);
}
else {
argv = origargv;
}
argv[0] = path;
execv(path, argv);
ruby_sourcefile = rb_source_filename(fname);
ruby_sourceline = 1;
rb_fatal("Can't exec %s", path);
}
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) {
p++; /* skip space before `-' */
while (*p == '-') {
p = moreswitches(p+1);
}
}
/* push back shebang for pragma may exist in next line */
rb_io_ungetc(f, INT2FIX('\n'));
rb_io_ungetc(f, INT2FIX('!'));
}
else if (!NIL_P(c)) {
rb_io_ungetc(f, c);
}
rb_io_ungetc(f, INT2FIX('#'));
}
else if (!NIL_P(c)) {
rb_io_ungetc(f, c);
}
require_libraries(); /* Why here? unnatural */
if (NIL_P(c)) return;
}
parser = rb_parser_new();
ruby_eval_tree = rb_parser_compile_file(parser, fname, f, line_start);
if (script && rb_parser_end_seen_p(parser)) {
rb_define_global_const("DATA", f);
}
else if (f != rb_stdin) {
rb_io_close(f);
}
}
void
rb_load_file(const char *fname)
{
load_file(fname, 0);
}
static void
load_stdin(void)
{
forbid_setid("program input from stdin");
load_file("-", 1);
}
VALUE rb_progname;
VALUE rb_argv;
VALUE rb_argv0;
#if defined(PSTAT_SETCMD) || defined(HAVE_SETPROCTITLE)
#elif defined(_WIN32)
#elif defined(HAVE_SETENV) && defined(HAVE_UNSETENV)
#else
#define USE_ENVSPACE_FOR_ARG0
#endif
#ifdef USE_ENVSPACE_FOR_ARG0
static struct {
char *begin, *end;
} envspace;