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4c00941411
* ext/etc/etc.c (setup_passwd, setup_group): set proper encodings to string members. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42349 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
801 lines
18 KiB
C
801 lines
18 KiB
C
/************************************************
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etc.c -
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$Author$
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created at: Tue Mar 22 18:39:19 JST 1994
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************************************************/
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#include "ruby.h"
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#include "ruby/encoding.h"
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#include <sys/types.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_GETPWENT
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#include <pwd.h>
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#endif
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#ifdef HAVE_GETGRENT
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#include <grp.h>
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#endif
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static VALUE sPasswd;
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#ifdef HAVE_GETGRENT
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static VALUE sGroup;
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#endif
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#ifdef _WIN32
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#include <shlobj.h>
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#ifndef CSIDL_COMMON_APPDATA
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#define CSIDL_COMMON_APPDATA 35
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#endif
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#endif
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#ifndef _WIN32
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char *getenv();
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#endif
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char *getlogin();
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/* call-seq:
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* getlogin -> String
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*
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* Returns the short user name of the currently logged in user.
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* Unfortunately, it is often rather easy to fool ::getlogin.
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*
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* Avoid ::getlogin for security-related purposes.
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*
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* If ::getlogin fails, try ::getpwuid.
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*
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* See the unix manpage for <code>getpwuid(3)</code> for more detail.
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*
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* e.g.
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* Etc.getlogin -> 'guest'
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*/
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static VALUE
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etc_getlogin(VALUE obj)
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{
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char *login;
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#ifdef HAVE_GETLOGIN
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login = getlogin();
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if (!login) login = getenv("USER");
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#else
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login = getenv("USER");
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#endif
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if (login)
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return rb_tainted_str_new2(login);
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return Qnil;
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}
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#if defined(HAVE_GETPWENT) || defined(HAVE_GETGRENT)
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static VALUE
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safe_setup_str(const char *str)
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{
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if (str == 0) str = "";
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return rb_tainted_str_new2(str);
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}
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static VALUE
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safe_setup_locale_str(const char *str)
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{
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if (str == 0) str = "";
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return rb_locale_str_new_cstr(str);
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}
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static VALUE
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safe_setup_filesystem_str(const char *str)
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{
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if (str == 0) str = "";
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return rb_filesystem_str_new_cstr(str);
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}
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#endif
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#ifdef HAVE_GETPWENT
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static VALUE
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setup_passwd(struct passwd *pwd)
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{
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if (pwd == 0) rb_sys_fail("/etc/passwd");
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return rb_struct_new(sPasswd,
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safe_setup_locale_str(pwd->pw_name),
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#ifdef HAVE_STRUCT_PASSWD_PW_PASSWD
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safe_setup_str(pwd->pw_passwd),
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#endif
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UIDT2NUM(pwd->pw_uid),
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GIDT2NUM(pwd->pw_gid),
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#ifdef HAVE_STRUCT_PASSWD_PW_GECOS
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safe_setup_locale_str(pwd->pw_gecos),
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#endif
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safe_setup_filesystem_str(pwd->pw_dir),
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safe_setup_filesystem_str(pwd->pw_shell),
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#ifdef HAVE_STRUCT_PASSWD_PW_CHANGE
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INT2NUM(pwd->pw_change),
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#endif
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#ifdef HAVE_STRUCT_PASSWD_PW_QUOTA
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INT2NUM(pwd->pw_quota),
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#endif
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#ifdef HAVE_STRUCT_PASSWD_PW_AGE
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PW_AGE2VAL(pwd->pw_age),
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#endif
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#ifdef HAVE_STRUCT_PASSWD_PW_CLASS
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safe_setup_locale_str(pwd->pw_class),
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#endif
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#ifdef HAVE_STRUCT_PASSWD_PW_COMMENT
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safe_setup_locale_str(pwd->pw_comment),
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#endif
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#ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE
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INT2NUM(pwd->pw_expire),
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#endif
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0 /*dummy*/
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);
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}
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#endif
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/* call-seq:
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* getpwuid(uid) -> Passwd
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*
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* Returns the /etc/passwd information for the user with the given integer +uid+.
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*
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* The information is returned as a Passwd struct.
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*
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* If +uid+ is omitted, the value from <code>Passwd[:uid]</code> is returned
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* instead.
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*
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* See the unix manpage for <code>getpwuid(3)</code> for more detail.
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*
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* === Example:
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*
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* Etc.getpwuid(0)
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* #=> #<struct Etc::Passwd name="root", passwd="x", uid=0, gid=0, gecos="root",dir="/root", shell="/bin/bash">
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*/
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static VALUE
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etc_getpwuid(int argc, VALUE *argv, VALUE obj)
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{
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#if defined(HAVE_GETPWENT)
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VALUE id;
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rb_uid_t uid;
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struct passwd *pwd;
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if (rb_scan_args(argc, argv, "01", &id) == 1) {
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uid = NUM2UIDT(id);
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}
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else {
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uid = getuid();
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}
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pwd = getpwuid(uid);
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if (pwd == 0) rb_raise(rb_eArgError, "can't find user for %d", (int)uid);
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return setup_passwd(pwd);
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#else
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return Qnil;
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#endif
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}
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/* call-seq:
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* getpwnam(name) -> Passwd
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*
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* Returns the /etc/passwd information for the user with specified login
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* +name+.
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*
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* The information is returned as a Passwd struct.
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*
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* See the unix manpage for <code>getpwnam(3)</code> for more detail.
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*
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* === Example:
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*
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* Etc.getpwnam('root')
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* #=> #<struct Etc::Passwd name="root", passwd="x", uid=0, gid=0, gecos="root",dir="/root", shell="/bin/bash">
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*/
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static VALUE
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etc_getpwnam(VALUE obj, VALUE nam)
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{
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#ifdef HAVE_GETPWENT
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struct passwd *pwd;
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SafeStringValue(nam);
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pwd = getpwnam(RSTRING_PTR(nam));
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if (pwd == 0) rb_raise(rb_eArgError, "can't find user for %"PRIsVALUE, nam);
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return setup_passwd(pwd);
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#else
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return Qnil;
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#endif
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}
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#ifdef HAVE_GETPWENT
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static int passwd_blocking = 0;
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static VALUE
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passwd_ensure(void)
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{
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endpwent();
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passwd_blocking = (int)Qfalse;
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return Qnil;
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}
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static VALUE
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passwd_iterate(void)
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{
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struct passwd *pw;
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setpwent();
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while (pw = getpwent()) {
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rb_yield(setup_passwd(pw));
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}
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return Qnil;
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}
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static void
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each_passwd(void)
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{
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if (passwd_blocking) {
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rb_raise(rb_eRuntimeError, "parallel passwd iteration");
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}
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passwd_blocking = (int)Qtrue;
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rb_ensure(passwd_iterate, 0, passwd_ensure, 0);
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}
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#endif
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/* call-seq:
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* Etc.passwd { |struct| block } -> Passwd
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* Etc.passwd -> Passwd
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*
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* Provides a convenient Ruby iterator which executes a block for each entry
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* in the /etc/passwd file.
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*
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* The code block is passed an Passwd struct.
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*
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* See ::getpwent above for details.
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*
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* Example:
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*
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* require 'etc'
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*
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* Etc.passwd {|u|
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* puts u.name + " = " + u.gecos
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* }
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*
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*/
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static VALUE
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etc_passwd(VALUE obj)
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{
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#ifdef HAVE_GETPWENT
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struct passwd *pw;
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if (rb_block_given_p()) {
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each_passwd();
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}
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else if (pw = getpwent()) {
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return setup_passwd(pw);
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}
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#endif
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return Qnil;
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}
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/* call-seq:
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* Etc::Passwd.each { |struct| block } -> Passwd
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* Etc::Passwd.each -> Enumerator
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*
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* Iterates for each entry in the /etc/passwd file if a block is given.
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*
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* If no block is given, returns the Enumerator.
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*
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* The code block is passed an Passwd struct.
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*
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* See ::getpwent above for details.
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*
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* Example:
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*
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* require 'etc'
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*
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* Etc::Passwd.each {|u|
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* puts u.name + " = " + u.gecos
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* }
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*
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* Etc::Passwd.collect {|u| u.gecos}
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* Etc::Passwd.collect {|u| u.gecos}
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*
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*/
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static VALUE
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etc_each_passwd(VALUE obj)
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{
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#ifdef HAVE_GETPWENT
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RETURN_ENUMERATOR(obj, 0, 0);
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each_passwd();
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#endif
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return obj;
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}
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/* Resets the process of reading the /etc/passwd file, so that the next call
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* to ::getpwent will return the first entry again.
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*/
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static VALUE
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etc_setpwent(VALUE obj)
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{
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#ifdef HAVE_GETPWENT
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setpwent();
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#endif
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return Qnil;
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}
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/* Ends the process of scanning through the /etc/passwd file begun with
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* ::getpwent, and closes the file.
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*/
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static VALUE
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etc_endpwent(VALUE obj)
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{
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#ifdef HAVE_GETPWENT
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endpwent();
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#endif
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return Qnil;
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}
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/* Returns an entry from the /etc/passwd file.
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*
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* The first time it is called it opens the file and returns the first entry;
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* each successive call returns the next entry, or +nil+ if the end of the file
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* has been reached.
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*
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* To close the file when processing is complete, call ::endpwent.
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*
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* Each entry is returned as a Passwd struct.
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*
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*/
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static VALUE
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etc_getpwent(VALUE obj)
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{
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#ifdef HAVE_GETPWENT
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struct passwd *pw;
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if (pw = getpwent()) {
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return setup_passwd(pw);
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}
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#endif
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return Qnil;
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}
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#ifdef HAVE_GETGRENT
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static VALUE
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setup_group(struct group *grp)
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{
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VALUE mem;
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char **tbl;
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mem = rb_ary_new();
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tbl = grp->gr_mem;
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while (*tbl) {
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rb_ary_push(mem, safe_setup_locale_str(*tbl));
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tbl++;
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}
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return rb_struct_new(sGroup,
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safe_setup_locale_str(grp->gr_name),
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#ifdef HAVE_STRUCT_GROUP_GR_PASSWD
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safe_setup_str(grp->gr_passwd),
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#endif
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GIDT2NUM(grp->gr_gid),
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mem);
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}
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#endif
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/* call-seq:
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* getgrgid(group_id) -> Group
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*
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* Returns information about the group with specified integer +group_id+,
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* as found in /etc/group.
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*
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* The information is returned as a Group struct.
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*
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* See the unix manpage for <code>getgrgid(3)</code> for more detail.
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*
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* === Example:
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*
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* Etc.getgrgid(100)
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* #=> #<struct Etc::Group name="users", passwd="x", gid=100, mem=["meta", "root"]>
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*
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*/
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static VALUE
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etc_getgrgid(int argc, VALUE *argv, VALUE obj)
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{
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#ifdef HAVE_GETGRENT
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VALUE id;
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gid_t gid;
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struct group *grp;
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if (rb_scan_args(argc, argv, "01", &id) == 1) {
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gid = NUM2GIDT(id);
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}
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else {
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gid = getgid();
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}
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grp = getgrgid(gid);
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if (grp == 0) rb_raise(rb_eArgError, "can't find group for %d", (int)gid);
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return setup_group(grp);
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#else
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return Qnil;
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#endif
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}
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/* call-seq:
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* getgrnam(name) -> Group
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*
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* Returns information about the group with specified +name+, as found in
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* /etc/group.
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*
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* The information is returned as a Group struct.
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*
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* See the unix manpage for <code>getgrnam(3)</code> for more detail.
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*
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* === Example:
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*
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* Etc.getgrnam('users')
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* #=> #<struct Etc::Group name="users", passwd="x", gid=100, mem=["meta", "root"]>
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*
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*/
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static VALUE
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etc_getgrnam(VALUE obj, VALUE nam)
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{
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#ifdef HAVE_GETGRENT
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struct group *grp;
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SafeStringValue(nam);
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grp = getgrnam(RSTRING_PTR(nam));
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if (grp == 0) rb_raise(rb_eArgError, "can't find group for %"PRIsVALUE, nam);
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return setup_group(grp);
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#else
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return Qnil;
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#endif
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}
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#ifdef HAVE_GETGRENT
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static int group_blocking = 0;
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static VALUE
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group_ensure(void)
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{
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endgrent();
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group_blocking = (int)Qfalse;
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return Qnil;
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}
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static VALUE
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group_iterate(void)
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{
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struct group *pw;
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setgrent();
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while (pw = getgrent()) {
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rb_yield(setup_group(pw));
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}
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return Qnil;
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}
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static void
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each_group(void)
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{
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if (group_blocking) {
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rb_raise(rb_eRuntimeError, "parallel group iteration");
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}
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group_blocking = (int)Qtrue;
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rb_ensure(group_iterate, 0, group_ensure, 0);
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}
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#endif
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/* Provides a convenient Ruby iterator which executes a block for each entry
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* in the /etc/group file.
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*
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* The code block is passed an Group struct.
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*
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* See ::getgrent above for details.
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*
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* Example:
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*
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* require 'etc'
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*
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* Etc.group {|g|
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* puts g.name + ": " + g.mem.join(', ')
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* }
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*
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*/
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static VALUE
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etc_group(VALUE obj)
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{
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#ifdef HAVE_GETGRENT
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struct group *grp;
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if (rb_block_given_p()) {
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each_group();
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}
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else if (grp = getgrent()) {
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return setup_group(grp);
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}
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#endif
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return Qnil;
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}
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#ifdef HAVE_GETGRENT
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/* call-seq:
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* Etc::Group.each { |group| block } -> obj
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* Etc::Group.each -> Enumerator
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*
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* Iterates for each entry in the /etc/group file if a block is given.
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*
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* If no block is given, returns the Enumerator.
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*
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* The code block is passed a Group struct.
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*
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* Example:
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*
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* require 'etc'
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*
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* Etc::Group.each {|g|
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* puts g.name + ": " + g.mem.join(', ')
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* }
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*
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* Etc::Group.collect {|g| g.name}
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* Etc::Group.select {|g| !g.mem.empty?}
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*
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*/
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static VALUE
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etc_each_group(VALUE obj)
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{
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RETURN_ENUMERATOR(obj, 0, 0);
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each_group();
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return obj;
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}
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#endif
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/* Resets the process of reading the /etc/group file, so that the next call
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* to ::getgrent will return the first entry again.
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*/
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static VALUE
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etc_setgrent(VALUE obj)
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{
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#ifdef HAVE_GETGRENT
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setgrent();
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#endif
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return Qnil;
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}
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/* Ends the process of scanning through the /etc/group file begun by
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* ::getgrent, and closes the file.
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*/
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static VALUE
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etc_endgrent(VALUE obj)
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{
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#ifdef HAVE_GETGRENT
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endgrent();
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#endif
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return Qnil;
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}
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|
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/* Returns an entry from the /etc/group file.
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*
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* The first time it is called it opens the file and returns the first entry;
|
|
* each successive call returns the next entry, or +nil+ if the end of the file
|
|
* has been reached.
|
|
*
|
|
* To close the file when processing is complete, call ::endgrent.
|
|
*
|
|
* Each entry is returned as a Group struct
|
|
*/
|
|
static VALUE
|
|
etc_getgrent(VALUE obj)
|
|
{
|
|
#ifdef HAVE_GETGRENT
|
|
struct group *gr;
|
|
|
|
if (gr = getgrent()) {
|
|
return setup_group(gr);
|
|
}
|
|
#endif
|
|
return Qnil;
|
|
}
|
|
|
|
#define numberof(array) (sizeof(array) / sizeof(*(array)))
|
|
|
|
#ifdef _WIN32
|
|
VALUE rb_w32_special_folder(int type);
|
|
UINT rb_w32_system_tmpdir(WCHAR *path, UINT len);
|
|
VALUE rb_w32_conv_from_wchar(const WCHAR *wstr, rb_encoding *enc);
|
|
#endif
|
|
|
|
/*
|
|
* Returns system configuration directory.
|
|
*
|
|
* This is typically "/etc", but is modified by the prefix used when Ruby was
|
|
* compiled. For example, if Ruby is built and installed in /usr/local, returns
|
|
* "/usr/local/etc".
|
|
*/
|
|
static VALUE
|
|
etc_sysconfdir(VALUE obj)
|
|
{
|
|
#ifdef _WIN32
|
|
return rb_w32_special_folder(CSIDL_COMMON_APPDATA);
|
|
#else
|
|
return rb_filesystem_str_new_cstr(SYSCONFDIR);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Returns system temporary directory; typically "/tmp".
|
|
*/
|
|
static VALUE
|
|
etc_systmpdir(void)
|
|
{
|
|
VALUE tmpdir;
|
|
#ifdef _WIN32
|
|
WCHAR path[_MAX_PATH];
|
|
UINT len = rb_w32_system_tmpdir(path, numberof(path));
|
|
if (!len) return Qnil;
|
|
tmpdir = rb_w32_conv_from_wchar(path, rb_filesystem_encoding());
|
|
#else
|
|
tmpdir = rb_filesystem_str_new_cstr("/tmp");
|
|
#endif
|
|
FL_UNSET(tmpdir, FL_TAINT);
|
|
return tmpdir;
|
|
}
|
|
|
|
/*
|
|
* The Etc module provides access to information typically stored in
|
|
* files in the /etc directory on Unix systems.
|
|
*
|
|
* The information accessible consists of the information found in the
|
|
* /etc/passwd and /etc/group files, plus information about the system's
|
|
* temporary directory (/tmp) and configuration directory (/etc).
|
|
*
|
|
* The Etc module provides a more reliable way to access information about
|
|
* the logged in user than environment variables such as +$USER+.
|
|
*
|
|
* == Example:
|
|
*
|
|
* require 'etc'
|
|
*
|
|
* login = Etc.getlogin
|
|
* info = Etc.getpwnam(login)
|
|
* username = info.gecos.split(/,/).first
|
|
* puts "Hello #{username}, I see your login name is #{login}"
|
|
*
|
|
* Note that the methods provided by this module are not always secure.
|
|
* It should be used for informational purposes, and not for security.
|
|
*
|
|
* All operations defined in this module are class methods, so that you can
|
|
* include the Etc module into your class.
|
|
*/
|
|
void
|
|
Init_etc(void)
|
|
{
|
|
VALUE mEtc;
|
|
|
|
mEtc = rb_define_module("Etc");
|
|
rb_define_module_function(mEtc, "getlogin", etc_getlogin, 0);
|
|
|
|
rb_define_module_function(mEtc, "getpwuid", etc_getpwuid, -1);
|
|
rb_define_module_function(mEtc, "getpwnam", etc_getpwnam, 1);
|
|
rb_define_module_function(mEtc, "setpwent", etc_setpwent, 0);
|
|
rb_define_module_function(mEtc, "endpwent", etc_endpwent, 0);
|
|
rb_define_module_function(mEtc, "getpwent", etc_getpwent, 0);
|
|
rb_define_module_function(mEtc, "passwd", etc_passwd, 0);
|
|
|
|
rb_define_module_function(mEtc, "getgrgid", etc_getgrgid, -1);
|
|
rb_define_module_function(mEtc, "getgrnam", etc_getgrnam, 1);
|
|
rb_define_module_function(mEtc, "group", etc_group, 0);
|
|
rb_define_module_function(mEtc, "setgrent", etc_setgrent, 0);
|
|
rb_define_module_function(mEtc, "endgrent", etc_endgrent, 0);
|
|
rb_define_module_function(mEtc, "getgrent", etc_getgrent, 0);
|
|
rb_define_module_function(mEtc, "sysconfdir", etc_sysconfdir, 0);
|
|
rb_define_module_function(mEtc, "systmpdir", etc_systmpdir, 0);
|
|
|
|
sPasswd = rb_struct_define_under(mEtc, "Passwd",
|
|
"name",
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_PASSWD
|
|
"passwd",
|
|
#endif
|
|
"uid",
|
|
"gid",
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_GECOS
|
|
"gecos",
|
|
#endif
|
|
"dir",
|
|
"shell",
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_CHANGE
|
|
"change",
|
|
#endif
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_QUOTA
|
|
"quota",
|
|
#endif
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_AGE
|
|
"age",
|
|
#endif
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_CLASS
|
|
"uclass",
|
|
#endif
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_COMMENT
|
|
"comment",
|
|
#endif
|
|
#ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE
|
|
"expire",
|
|
#endif
|
|
NULL);
|
|
#if 0
|
|
/* Define-const: Passwd
|
|
*
|
|
* Passwd is a Struct that contains the following members:
|
|
*
|
|
* name::
|
|
* contains the short login name of the user as a String.
|
|
* passwd::
|
|
* contains the encrypted password of the user as a String.
|
|
* an 'x' is returned if shadow passwords are in use. An '*' is returned
|
|
* if the user cannot log in using a password.
|
|
* uid::
|
|
* contains the integer user ID (uid) of the user.
|
|
* gid::
|
|
* contains the integer group ID (gid) of the user's primary group.
|
|
* dir::
|
|
* contains the path to the home directory of the user as a String.
|
|
* shell::
|
|
* contains the path to the login shell of the user as a String.
|
|
*
|
|
* === The following members below are optional, and must be compiled with special flags:
|
|
*
|
|
* gecos::
|
|
* contains a longer String description of the user, such as
|
|
* a full name. Some Unix systems provide structured information in the
|
|
* gecos field, but this is system-dependent.
|
|
* must be compiled with +HAVE_STRUCT_PASSWD_PW_GECOS+
|
|
* change::
|
|
* password change time(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_CHANGE+
|
|
* quota::
|
|
* quota value(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_QUOTA+
|
|
* age::
|
|
* password age(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_AGE+
|
|
* class::
|
|
* user access class(string) must be compiled with +HAVE_STRUCT_PASSWD_PW_CLASS+
|
|
* comment::
|
|
* comment(string) must be compiled with +HAVE_STRUCT_PASSWD_PW_COMMENT+
|
|
* expire::
|
|
* account expiration time(integer) must be compiled with +HAVE_STRUCT_PASSWD_PW_EXPIRE+
|
|
*/
|
|
rb_define_const(mEtc, "Passwd", sPasswd);
|
|
#endif
|
|
rb_define_const(rb_cStruct, "Passwd", sPasswd); /* deprecated name */
|
|
rb_extend_object(sPasswd, rb_mEnumerable);
|
|
rb_define_singleton_method(sPasswd, "each", etc_each_passwd, 0);
|
|
|
|
#ifdef HAVE_GETGRENT
|
|
sGroup = rb_struct_define_under(mEtc, "Group", "name",
|
|
#ifdef HAVE_STRUCT_GROUP_GR_PASSWD
|
|
"passwd",
|
|
#endif
|
|
"gid", "mem", NULL);
|
|
|
|
#if 0
|
|
/* Define-const: Group
|
|
*
|
|
* Group is a Struct that is only available when compiled with +HAVE_GETGRENT+.
|
|
*
|
|
* The struct contains the following members:
|
|
*
|
|
* name::
|
|
* contains the name of the group as a String.
|
|
* passwd::
|
|
* contains the encrypted password as a String. An 'x' is
|
|
* returned if password access to the group is not available; an empty
|
|
* string is returned if no password is needed to obtain membership of
|
|
* the group.
|
|
*
|
|
* Must be compiled with +HAVE_STRUCT_GROUP_GR_PASSWD+.
|
|
* gid::
|
|
* contains the group's numeric ID as an integer.
|
|
* mem::
|
|
* is an Array of Strings containing the short login names of the
|
|
* members of the group.
|
|
*/
|
|
rb_define_const(mEtc, "Group", sGroup);
|
|
#endif
|
|
rb_define_const(rb_cStruct, "Group", sGroup); /* deprecated name */
|
|
rb_extend_object(sGroup, rb_mEnumerable);
|
|
rb_define_singleton_method(sGroup, "each", etc_each_group, 0);
|
|
#endif
|
|
}
|