Add `optimization_to_close_fds.patch`

.cronie.metadata

@@ -0,0 +1 @@
+0275d7c3b5376664f9e2c50b8c8cc338408b08b2 cronie-1.5.7.tar.gz

cronie.spec

@@ -6,7 +6,7 @@
 Summary:   Cron daemon for executing programs at set times
 Name:      cronie
 Version:   1.5.7
-Release:   10%{?dist}
+Release:   11%{?dist}
 License:   MIT and BSD and ISC and GPLv2+
 URL:       https://github.com/cronie-crond/cronie
 Source0:   https://github.com/cronie-crond/cronie/releases/download/cronie-%{version}/cronie-%{version}.tar.gz
@@ -20,6 +20,9 @@ Patch:     0005-Fix-regression-in-handling-1-5-crontab-entries.patch
 # Add support for `-n` option in crontab entries
 # https://github.com/cronie-crond/cronie/commit/ce7d5bf0a43d147f8502e6424cd523b56adf5599
 Patch:     n_option.patch
+# Optimization to close fds from /proc/self/fd in case of high nofile limit after fork
+# https://github.com/cronie-crond/cronie/commit/e3682c7135b9176b60d226c60ee4e78cf1ab711b
+Patch:     optimization_to_close_fds.patch
 
 Requires:  dailyjobs
 
@@ -214,6 +217,10 @@ exit 0
 %attr(0644,root,root) %config(noreplace) %{_sysconfdir}/cron.d/dailyjobs
 
 %changelog
+* Thu Nov 30 2023 Ondřej Pohořelský <opohorel@redhat.com> - 1.5.7-11
+- Add `optimization_to_close_fds.patch`
+- Resolves: RHEL-17710
+
 * Thu Nov 16 2023 Jan Houška <jhouska@redhat.com> - 1.5.7-10
 - Related: RHEL-5372
 - remove obsolete tests.

optimization_to_close_fds.patch

@@ -0,0 +1,52 @@
+From e3682c7135b9176b60d226c60ee4e78cf1ab711b Mon Sep 17 00:00:00 2001
+From: bwelterl <bwelterl@redhat.com>
+Date: Thu, 7 Sep 2023 10:05:36 +0200
+Subject: [PATCH] Optimization to close fds from /proc/self/fd in case of high
+ nofile limit after fork
+
+---
+ src/do_command.c | 23 ++++++++++++++++++++---
+ 1 file changed, 20 insertions(+), 3 deletions(-)
+
+diff --git a/src/do_command.c b/src/do_command.c
+index 500f1b0..665e1f0 100644
+--- a/src/do_command.c
++++ b/src/do_command.c
+@@ -30,6 +30,7 @@
+ #include <string.h>
+ #include <sys/wait.h>
+ #include <unistd.h>
++#include <dirent.h>
+ 
+ #include "externs.h"
+ #include "funcs.h"
+@@ -264,10 +265,26 @@ static int child_process(entry * e, char **jobenv) {
+ 		{
+ 			char *shell = env_get("SHELL", jobenv);
+ 			int fd, fdmax = TMIN(getdtablesize(), MAX_CLOSE_FD);
++			DIR *dir;
++			struct dirent *dent;
+ 
+-			/* close all unwanted open file descriptors */
+-			for(fd = STDERR + 1; fd < fdmax; fd++) {
+-				close(fd);
++			/*
++			 * if /proc is mounted, we can optimize what fd can be closed,
++			 * but if it isn't available, fall back to the previous behavior.
++			 */
++			if ((dir = opendir("/proc/self/fd")) != NULL) {
++				while ((dent = readdir(dir)) != NULL) {
++					if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
++						continue;
++					fd = atoi(dent->d_name);
++					if (fd > STDERR_FILENO)
++						close(fd);
++				}
++			} else {
++				/* close all unwanted open file descriptors */
++				for (fd = STDERR + 1; fd < fdmax; fd++) {
++					close(fd);
++				}
+ 			}
+ 
+ #if DEBUGGING