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su: cleanup code to copy to log strings 

man utmp:
  String fields are terminated by a null byte ('\0') if they are shorter
  than the size of the field.

Signed-off-by: Karel Zak <kzak@redhat.com>
This commit is contained in:
Karel Zak 2018-10-03 17:08:11 +02:00
parent ac5c12fdc2
commit 7f76bc8a75
1 changed files with 3 additions and 3 deletions
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6
login-utils/su-common.c
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@ -609,14 +609,14 @@ static void log_btmp(struct su_context *su)
DBG(LOG, ul_debug("btmp logging"));
memset(&ut, 0, sizeof(ut));
strncpy(ut.ut_user,
str2memcpy(ut.ut_user,
su->pwd && su->pwd->pw_name ? su->pwd->pw_name : "(unknown)",
sizeof(ut.ut_user));
if (su->tty_number)
xstrncpy(ut.ut_id, su->tty_number, sizeof(ut.ut_id));
str2memcpy(ut.ut_id, su->tty_number, sizeof(ut.ut_id));
if (su->tty_name)
xstrncpy(ut.ut_line, su->tty_name, sizeof(ut.ut_line));
str2memcpy(ut.ut_line, su->tty_name, sizeof(ut.ut_line));
gettimeofday(&tv, NULL);
ut.ut_tv.tv_sec = tv.tv_sec;