diff options
Diffstat (limited to 'loginutils/su.c')
| -rw-r--r-- | loginutils/su.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/loginutils/su.c b/loginutils/su.c index a8b852b09..a3f7ed8a0 100644 --- a/loginutils/su.c +++ b/loginutils/su.c @@ -40,11 +40,24 @@ int su_main(int argc UNUSED_PARAM, char **argv) 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(IF_FEATURE_UTMP(getlogin() ? : ) (pw = getpwuid(cur_uid)) ? pw->pw_name : ""); - tty = xmalloc_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); } |