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Vodz, last patch 105

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Busybox "mount" applet unsupport "user" option and
result: must have _BB_SUID_NEVER applet option (my bug).
Last patch have reducing 216 bytes for "su" applet also.
This commit is contained in:
Glenn L McGrath 2003-08-29 07:38:56 +00:00
parent dc72f3ace2
commit a6b7bdcf8c
2 changed files with 65 additions and 73 deletions
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2
include/applets.h
View File

@ -392,7 +392,7 @@
APPLET(more, more_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_MOUNT
APPLET(mount, mount_main, _BB_DIR_BIN, _BB_SUID_MAYBE)
APPLET(mount, mount_main, _BB_DIR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_MSH
APPLET_NOUSAGE("msh", msh_main, _BB_DIR_BIN, _BB_SUID_NEVER)

136
loginutils/su.c
View File

@ -29,77 +29,57 @@
#if defined( SYSLOG_SUCCESS ) || defined( SYSLOG_FAILURE )
/* Log the fact that someone has run su to the user given by PW;
if SUCCESSFUL is nonzero, they gave the correct password, etc. */
/* Log the fact that someone has run su */
static void log_su ( const struct passwd *pw, int successful )
# if defined( SYSLOG_SUCCESS ) && defined( SYSLOG_FAILURE )
static void log_su (const char *successful, const char *old_user, const char *tty)
{
const char *old_user, *tty;
#if !defined( SYSLOG_SUCESS )
if ( successful )
return;
#endif
#if !defined( SYSLOG_FAILURE )
if ( !successful )
return;
#endif
if ( pw-> pw_uid ) // not to root -> ignored
return;
/* The utmp entry (via getlogin) is probably the best way to identify
the user, especially if someone su's from a su-shell. */
old_user = getlogin ( );
if ( !old_user ) {
/* getlogin can fail -- usually due to lack of utmp entry. Resort to getpwuid. */
struct passwd *pwd = getpwuid ( getuid ( ));
old_user = ( pwd ? pwd-> pw_name : "" );
}
tty = ttyname ( 2 );
openlog ( "su", 0, LOG_AUTH );
syslog ( LOG_NOTICE, "%s%s on %s", successful ? "" : "FAILED SU ", old_user, tty ? tty : "none" );
syslog ( LOG_NOTICE, "%s%s on %s", successful, old_user, tty);
}
# define log_su_successful(cu, u, tty) if(!cu) log_su("", u, tty)
# define log_su_failure(cu, u, tty) if(!cu) log_su("FAILED SU ", u, tty)
# else
/* partial logging */
# if !defined( SYSLOG_SUCESS )
# define log_su_successful(cu, u, tty)
# define log_su_failure(cu, u, t) if(!cu) \
syslog(LOG_NOTICE, "FAILED SU %s on %s", u, t)
# else
# define log_su_successful(cu, u, t) if(!cu) \
syslog(LOG_NOTICE, "%s on %s", u, t)
# define log_su_failure(cu, u, tty)
# endif
# endif
#else
/* logging not used */
# define log_su_successful(cu, u, tty)
# define log_su_failure(cu, u, tty)
#endif
int su_main ( int argc, char **argv )
{
int flag;
int opt_preserve = 0;
int opt_loginshell = 0;
unsigned long flags;
int opt_preserve;
int opt_loginshell;
char *opt_shell = 0;
char *opt_command = 0;
char *opt_username = DEFAULT_USER;
char **opt_args = 0;
struct passwd *pw, pw_copy;
struct passwd *pw;
uid_t cur_uid = getuid();
#if defined( SYSLOG_SUCCESS ) || defined( SYSLOG_FAILURE )
const char *tty;
const char *old_user;
#endif
while (( flag = getopt ( argc, argv, "c:lmps:" )) != -1 ) {
switch ( flag ) {
case 'c':
opt_command = optarg;
break;
case 'm':
case 'p':
opt_preserve = 1;
break;
case 's':
opt_shell = optarg;
break;
case 'l':
opt_loginshell = 1;
break;
default:
bb_show_usage( );
break;
}
}
flags = bb_getopt_ulflags(argc, argv, "mplc:s:",
&opt_command, &opt_shell);
opt_preserve = flags & 3;
opt_loginshell = (flags & 4 ? 1 : 0);
if (( optind < argc ) && ( argv [optind][0] == '-' ) && ( argv [optind][1] == 0 )) {
if (optind < argc && argv[optind][0] == '-' && argv[optind][1] == 0) {
opt_loginshell = 1;
++optind;
}
@ -111,6 +91,24 @@ int su_main ( int argc, char **argv )
if ( optind < argc )
opt_args = argv + optind;
#if defined( SYSLOG_SUCCESS ) || defined( SYSLOG_FAILURE )
#ifdef CONFIG_FEATURE_U_W_TMP
/* The utmp entry (via getlogin) is probably the best way to identify
the user, especially if someone su's from a su-shell. */
old_user = getlogin ( );
if ( !old_user )
#endif
{
/* getlogin can fail -- usually due to lack of utmp entry. Resort to getpwuid. */
pw = getpwuid ( cur_uid );
old_user = ( pw ? pw->pw_name : "" );
}
tty = ttyname ( 2 );
if(!tty)
tty = "none";
openlog ( bb_applet_name, 0, LOG_AUTH );
#endif
pw = getpwnam ( opt_username );
if ( !pw )
@ -122,27 +120,21 @@ int su_main ( int argc, char **argv )
if ( !pw-> pw_shell || !pw->pw_shell [0] )
pw-> pw_shell = (char *) DEFAULT_SHELL;
/* Make a copy of the password information and point pw at the local
copy instead. Otherwise, some systems (e.g. Linux) would clobber
the static data through the getlogin call from log_su. */
pw_copy = *pw;
pw = &pw_copy;
pw-> pw_name = bb_xstrdup ( pw-> pw_name );
pw-> pw_dir = bb_xstrdup ( pw-> pw_dir );
pw-> pw_shell = bb_xstrdup ( pw-> pw_shell );
if (( getuid ( ) == 0 ) || correct_password ( pw ))
log_su ( pw, 1 );
else {
log_su ( pw, 0 );
if ((( cur_uid == 0 ) || correct_password ( pw ))) {
log_su_successful(pw->pw_uid, old_user, tty );
} else {
log_su_failure (pw->pw_uid, old_user, tty );
bb_error_msg_and_die ( "incorrect password" );
}
#if defined( SYSLOG_SUCCESS ) || defined( SYSLOG_FAILURE )
closelog();
#endif
if ( !opt_shell && opt_preserve )
opt_shell = getenv ( "SHELL" );
if ( opt_shell && getuid ( ) && restricted_shell ( pw-> pw_shell ))
{
if ( opt_shell && cur_uid && restricted_shell ( pw-> pw_shell )) {
/* The user being su'd to has a nonstandard shell, and so is
probably a uucp account or has restricted access. Don't
compromise the account by allowing access with a standard
@ -152,7 +144,7 @@ int su_main ( int argc, char **argv )
}
if ( !opt_shell )
opt_shell = bb_xstrdup ( pw-> pw_shell );
opt_shell = pw->pw_shell;
change_identity ( pw );
setup_environment ( opt_shell, opt_loginshell, !opt_preserve, pw );