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-rw-r--r--include/libbb.h6
-rw-r--r--libbb/change_identity.c12
-rw-r--r--loginutils/Config.in8
-rw-r--r--loginutils/login.c22
4 files changed, 39 insertions, 9 deletions
diff --git a/include/libbb.h b/include/libbb.h
index 6bea048..7fbeb4f 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -490,9 +490,9 @@ void xprint_and_close_file(FILE *file);
#define FAIL_DELAY 3
extern void bb_do_delay(int seconds);
-extern void change_identity ( const struct passwd *pw );
-extern const char *change_identity_e2str ( const struct passwd *pw );
-extern void run_shell ( const char *shell, int loginshell, const char *command, const char **additional_args);
+extern void change_identity(const struct passwd *pw);
+extern const char *change_identity_e2str(const struct passwd *pw);
+extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args);
#ifdef CONFIG_SELINUX
extern void renew_current_security_context(void);
extern void set_current_security_context(security_context_t sid);
diff --git a/libbb/change_identity.c b/libbb/change_identity.c
index 74ffccb..63c5ae1 100644
--- a/libbb/change_identity.c
+++ b/libbb/change_identity.c
@@ -40,21 +40,21 @@
/* Become the user and group(s) specified by PW. */
-const char *change_identity_e2str ( const struct passwd *pw )
+const char *change_identity_e2str(const struct passwd *pw)
{
- if ( initgroups ( pw-> pw_name, pw-> pw_gid ) == -1 )
+ if (initgroups(pw->pw_name, pw->pw_gid) == -1)
return "cannot set groups";
- endgrent ( );
+ endgrent();
- xsetgid(pw-> pw_gid);
+ xsetgid(pw->pw_gid);
xsetuid(pw->pw_uid);
return NULL;
}
-void change_identity ( const struct passwd *pw )
+void change_identity(const struct passwd *pw)
{
const char *err_msg = change_identity_e2str(pw);
if(err_msg)
- bb_perror_msg_and_die ( "%s", err_msg );
+ bb_perror_msg_and_die("%s", err_msg);
}
diff --git a/loginutils/Config.in b/loginutils/Config.in
index 71e0a3a..6e45b70 100644
--- a/loginutils/Config.in
+++ b/loginutils/Config.in
@@ -111,6 +111,14 @@ config CONFIG_LOGIN
Note that Busybox binary must be setuid root for this applet to
work properly.
+config CONFIG_LOGIN_SCRIPTS
+ bool "Support for login scripts"
+ depends on CONFIG_LOGIN
+ default n
+ help
+ Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT
+ just prior to swithching from root to logged-in user.
+
config CONFIG_FEATURE_SECURETTY
bool "Support for /etc/securetty"
default y
diff --git a/loginutils/login.c b/loginutils/login.c
index 5b4edd8..39d980f 100644
--- a/loginutils/login.c
+++ b/loginutils/login.c
@@ -15,6 +15,7 @@
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/types.h>
+#include <sys/wait.h>
#include <ctype.h>
#include <time.h>
@@ -258,6 +259,27 @@ auth_ok:
chown ( full_tty, pw-> pw_uid, pw-> pw_gid );
chmod ( full_tty, 0600 );
+ if (ENABLE_LOGIN_SCRIPTS) {
+ char *script = getenv("LOGIN_PRE_SUID_SCRIPT");
+ if (script) {
+ char *t_argv[2] = { script, NULL };
+ switch(fork()) {
+ case -1: break;
+ case 0: /* child */
+ xchdir("/");
+ setenv("LOGIN_TTY", full_tty, 1);
+ setenv("LOGIN_USER", pw->pw_name, 1);
+ setenv("LOGIN_UID", utoa(pw->pw_uid), 1);
+ setenv("LOGIN_GID", utoa(pw->pw_gid), 1);
+ setenv("LOGIN_SHELL", pw->pw_shell, 1);
+ execvp(script, t_argv);
+ exit(1);
+ default: /* parent */
+ wait(NULL);
+ }
+ }
+ }
+
change_identity ( pw );
tmp = pw-> pw_shell;
if(!tmp || !*tmp)