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From d4a05cc653c9e251a04afa9bd4f5a75777029445 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Thu, 2 Feb 2023 15:46:43 +0100
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Subject: last: use snprintf() rather than sprintf()
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Signed-off-by: Karel Zak <kzak@redhat.com>
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Upstream: http://github.com/util-linux/util-linux/commit/79fb7e18f45e84c6f1a030b5df56cb2bdad26df0
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Upstream: http://github.com/util-linux/util-linux/commit/6cd0043221b31a344db8f5dcb82822a2519a2e74
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=2166653
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---
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login-utils/last.c | 38 +++++++++++++++++++-------------------
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1 file changed, 19 insertions(+), 19 deletions(-)
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diff --git a/login-utils/last.c b/login-utils/last.c
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index f3272caeb..7f4421c89 100644
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--- a/login-utils/last.c
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+++ b/login-utils/last.c
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@@ -463,48 +463,48 @@ static int list(const struct last_control *ctl, struct utmpx *p, time_t logout_t
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if (logout_time == currentdate) {
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if (ctl->time_fmt > LAST_TIMEFTM_SHORT) {
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- sprintf(logouttime, " still running");
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+ snprintf(logouttime, sizeof(logouttime), " still running");
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length[0] = 0;
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} else {
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- sprintf(logouttime, " still");
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- sprintf(length, "running");
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+ snprintf(logouttime, sizeof(logouttime), " still");
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+ snprintf(length, sizeof(length), "running");
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}
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} else if (days) {
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- sprintf(length, "(%d+%02d:%02d)", days, abs(hours), abs(mins)); /* hours and mins always shown as positive (w/o minus sign!) even if secs < 0 */
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+ snprintf(length, sizeof(length), "(%d+%02d:%02d)", days, abs(hours), abs(mins)); /* hours and mins always shown as positive (w/o minus sign!) even if secs < 0 */
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} else if (hours) {
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- sprintf(length, " (%02d:%02d)", hours, abs(mins)); /* mins always shown as positive (w/o minus sign!) even if secs < 0 */
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+ snprintf(length, sizeof(length), " (%02d:%02d)", hours, abs(mins)); /* mins always shown as positive (w/o minus sign!) even if secs < 0 */
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} else if (secs >= 0) {
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- sprintf(length, " (%02d:%02d)", hours, mins);
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+ snprintf(length, sizeof(length), " (%02d:%02d)", hours, mins);
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} else {
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- sprintf(length, " (-00:%02d)", abs(mins)); /* mins always shown as positive (w/o minus sign!) even if secs < 0 */
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+ snprintf(length, sizeof(length), " (-00:%02d)", abs(mins)); /* mins always shown as positive (w/o minus sign!) even if secs < 0 */
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}
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switch(what) {
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case R_CRASH:
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- sprintf(logouttime, "- crash");
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+ snprintf(logouttime, sizeof(logouttime), "- crash");
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break;
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case R_DOWN:
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- sprintf(logouttime, "- down ");
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+ snprintf(logouttime, sizeof(logouttime), "- down ");
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break;
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case R_NOW:
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if (ctl->time_fmt > LAST_TIMEFTM_SHORT) {
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- sprintf(logouttime, " still logged in");
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+ snprintf(logouttime, sizeof(logouttime), " still logged in");
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length[0] = 0;
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} else {
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- sprintf(logouttime, " still");
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- sprintf(length, "logged in");
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+ snprintf(logouttime, sizeof(logouttime), " still");
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+ snprintf(length, sizeof(length), "logged in");
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}
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break;
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case R_PHANTOM:
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if (ctl->time_fmt > LAST_TIMEFTM_SHORT) {
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- sprintf(logouttime, " gone - no logout");
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+ snprintf(logouttime, sizeof(logouttime), " gone - no logout");
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length[0] = 0;
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} else if (ctl->time_fmt == LAST_TIMEFTM_SHORT) {
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- sprintf(logouttime, " gone");
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- sprintf(length, "- no logout");
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+ snprintf(logouttime, sizeof(logouttime), " gone");
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+ snprintf(length, sizeof(length), "- no logout");
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} else {
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logouttime[0] = 0;
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- sprintf(length, "no logout");
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+ snprintf(length, sizeof(length), "no logout");
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}
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break;
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case R_TIMECHANGE:
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@@ -756,7 +756,7 @@ static void process_wtmp_file(const struct last_control *ctl,
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else {
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if (ut.ut_type != DEAD_PROCESS &&
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ut.ut_user[0] && ut.ut_line[0] &&
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- strcmp(ut.ut_user, "LOGIN") != 0)
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+ strncmp(ut.ut_user, "LOGIN", 5) != 0)
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ut.ut_type = USER_PROCESS;
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/*
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* Even worse, applications that write ghost
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@@ -769,7 +769,7 @@ static void process_wtmp_file(const struct last_control *ctl,
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/*
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* Clock changes.
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*/
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- if (strcmp(ut.ut_user, "date") == 0) {
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+ if (strncmp(ut.ut_user, "date", 4) == 0) {
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if (ut.ut_line[0] == '|')
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ut.ut_type = OLD_TIME;
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if (ut.ut_line[0] == '{')
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@@ -804,7 +804,7 @@ static void process_wtmp_file(const struct last_control *ctl,
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case RUN_LVL:
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x = ut.ut_pid & 255;
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if (ctl->extended) {
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- sprintf(ut.ut_line, "(to lvl %c)", x);
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+ snprintf(ut.ut_line, sizeof(ut.ut_line), "(to lvl %c)", x);
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quit = list(ctl, &ut, lastrch, R_NORMAL);
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}
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if (x == '0' || x == '6') {
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--
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2.39.1
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