From a5c5dc6f0b96f9ef8c567f40388d91d44aec1eb7 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Fri, 7 Jun 2019 12:29:24 +0200 Subject: [PATCH] passwd: do not set 0 as date of last password change, closes 11951 function old new delta update_passwd 1491 1505 +14 Signed-off-by: Denys Vlasenko --- libbb/update_passwd.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/libbb/update_passwd.c b/libbb/update_passwd.c index 95423d19b..dc967683a 100644 --- a/libbb/update_passwd.c +++ b/libbb/update_passwd.c @@ -270,10 +270,16 @@ int FAST_FUNC update_passwd(const char *filename, if (shadow && *cp == ':') { /* /etc/shadow's field 3 (passwd change date) needs updating */ /* move past old change date */ + unsigned time_days = (unsigned long)(time(NULL)) / (24*60*60); + + if (time_days == 0) { + /* 0 as change date has special meaning, avoid it */ + time_days = 1; + } cp = strchrnul(cp + 1, ':'); /* "name:" + "new_passwd" + ":" + "change date" + ":rest of line" */ fprintf(new_fp, "%s%s:%u%s\n", name_colon, new_passwd, - (unsigned)(time(NULL)) / (24*60*60), cp); + time_days, cp); } else { /* "name:" + "new_passwd" + ":rest of line" */ fprintf(new_fp, "%s%s%s\n", name_colon, new_passwd, cp); -- 2.25.1