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Index: shadow-4.5/src/chage.c
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===================================================================
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--- shadow-4.5.orig/src/chage.c
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+++ shadow-4.5/src/chage.c
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@@ -168,6 +168,10 @@ static void date_to_str (char *buf, size
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struct tm *tp;
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tp = gmtime (&date);
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+ if (tp == NULL) {
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+ (void) snprintf (buf, maxsize, "(unknown)");
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+ return;
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+ }
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#ifdef HAVE_STRFTIME
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(void) strftime (buf, maxsize, "%Y-%m-%d", tp);
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#else
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Index: shadow-4.5/src/lastlog.c
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===================================================================
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--- shadow-4.5.orig/src/lastlog.c
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+++ shadow-4.5/src/lastlog.c
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@@ -158,13 +158,17 @@ static void print_one (/*@null@*/const s
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ll_time = ll.ll_time;
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tm = localtime (&ll_time);
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+ if (tm == NULL) {
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+ cp = "(unknown)";
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+ } else {
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#ifdef HAVE_STRFTIME
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- strftime (ptime, sizeof (ptime), "%a %b %e %H:%M:%S %z %Y", tm);
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- cp = ptime;
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+ strftime (ptime, sizeof (ptime), "%a %b %e %H:%M:%S %z %Y", tm);
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+ cp = ptime;
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#else
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- cp = asctime (tm);
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- cp[24] = '\0';
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+ cp = asctime (tm);
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+ cp[24] = '\0';
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#endif
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+ }
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if (ll.ll_time == (time_t) 0) {
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cp = _("**Never logged in**\0");
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Index: shadow-4.5/src/passwd.c
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===================================================================
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--- shadow-4.5.orig/src/passwd.c
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+++ shadow-4.5/src/passwd.c
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@@ -455,6 +455,9 @@ static /*@observer@*/const char *date_to
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struct tm *tm;
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tm = gmtime (&t);
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+ if (tm == NULL) {
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+ return "(unknown)";
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+ }
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#ifdef HAVE_STRFTIME
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(void) strftime (buf, sizeof buf, "%m/%d/%Y", tm);
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#else /* !HAVE_STRFTIME */
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Index: shadow-4.5/src/usermod.c
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===================================================================
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--- shadow-4.5.orig/src/usermod.c
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+++ shadow-4.5/src/usermod.c
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@@ -210,6 +210,10 @@ static void date_to_str (/*@unique@*//*@
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} else {
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time_t t = (time_t) date;
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tp = gmtime (&t);
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+ if (tp == NULL) {
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+ strncpy (buf, "unknown", maxsize);
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+ return;
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+ }
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#ifdef HAVE_STRFTIME
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strftime (buf, maxsize, "%Y-%m-%d", tp);
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#else
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