if (ENABLE_FEATURE_SU_SYSLOG) {
/* The utmp entry (via getlogin) is probably the best way to identify
- the user, especially if someone su's from a su-shell.
- But getlogin can fail -- usually due to lack of utmp entry.
- in this case resort to getpwuid. */
- old_user = xstrdup(USE_FEATURE_UTMP(getlogin() ? : ) (pw = getpwuid(cur_uid)) ? pw->pw_name : "");
- tty = ttyname(2) ? : "none";
+ * the user, especially if someone su's from a su-shell.
+ * But getlogin can fail -- usually due to lack of utmp entry.
+ * in this case resort to getpwuid. */
+ const char *user;
+#if ENABLE_FEATURE_UTMP
+ char user_buf[64];
+ user = user_buf;
+ if (getlogin_r(user_buf, sizeof(user_buf)) != 0)
+#endif
+ {
+ pw = getpwuid(cur_uid);
+ user = pw ? pw->pw_name : "";
+ }
+ old_user = xstrdup(user);
+ tty = xmalloc_ttyname(2);
+ if (!tty) {
+ tty = "none";
+ }
openlog(applet_name, 0, LOG_AUTH);
}
- pw = getpwnam(opt_username);
- if (!pw)
- bb_error_msg_and_die("unknown id: %s", opt_username);
+ pw = xgetpwnam(opt_username);
/* Make sure pw->pw_shell is non-NULL. It may be NULL when NEW_USER
is a username that is retrieved via NIS (YP), but that doesn't have
change_identity(pw);
/* setup_environment params: shell, clear_env, change_env, pw */
setup_environment(opt_shell, flags & SU_OPT_l, !(flags & SU_OPT_mp), pw);
- USE_SELINUX(set_current_security_context(NULL);)
+ IF_SELINUX(set_current_security_context(NULL);)
/* Never returns */
run_shell(opt_shell, flags & SU_OPT_l, opt_command, (const char**)argv);