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COPYING.anacron Normal file
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
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This General Public License does not permit incorporating your program into
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104
ChangeLog
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@ -1,3 +1,107 @@
2019-10-31 Tomas Mraz <tmraz@fedoraproject.org>
* Release new version 1.5.5
2019-10-31 Tomas Mraz <tmraz@fedoraproject.org>
* Avoid warning for strncat.
2019-10-29 Christian Kastner <ckk@kvr.at>
* crontab.1: Various fixes and improvements
2019-10-30 Christian Kastner <ckk@kvr.at>
* crontab: fsync to check for full disk
2019-10-30 Christian Kastner <ckk@kvr.at>
* crontab: Add Y/N to retry prompt
2019-10-30 Christian Kastner <ckk@kvr.at>
* entries: Explicitly validate upper ranges and steps
2019-10-29 Christian Kastner <ckk@kvr.at>
* crond: report missing newline before EOF
2019-09-09 Christian Hesse <mail@eworm.de>
* do not log carriage return
2019-08-22 sgerwk <sgerwk@aol.com>
* skip directories when given as crontabs
2019-07-22 Stephane Blondon <stephane.blondon@gmail.com>
* crontab -l colors comment lines in a different color
2019-07-09 sgerwk <sgerwk@aol.com>
* fix compile instruction: configure is generated by autogen.sh
2019-07-08 Tomas Mraz <tmraz@fedoraproject.org>
* getdtablesize() can return very high values in containers
2019-05-11 John Horne <jayaich@users.noreply.github.com>
* Power supply name not detected correctly.
2019-05-07 Tomas Mraz <tmraz@fedoraproject.org>
* Revert "Avoid creating pid files when crond doesn't fork"
2019-04-15 Tomas Mraz <tmraz@fedoraproject.org>
* anacron: fix types in comparisons
2019-03-31 Sami Kerola <kerolasa@iki.fi>
* mics: stop using plain integer as NULL pointer
2019-03-31 Sami Kerola <kerolasa@iki.fi>
* cron: fix type in comparison
2019-03-31 Sami Kerola <kerolasa@iki.fi>
* cron: fix variable shadowing
2019-03-31 Sami Kerola <kerolasa@iki.fi>
* cron: mark signal number arguments in signal handlers unused
2019-04-08 Tomáš Mráz <t8m@users.noreply.github.com>
* Update readme.md with recent releases
2019-04-08 Tomas Mraz <tmraz@fedoraproject.org>
* Move allowed() and related function to security.c
2019-03-31 Sami Kerola <kerolasa@iki.fi>
* build-sys: enable anacron by default
2019-03-31 Sami Kerola <kerolasa@iki.fi>
* build-sys: use none-recursive build
2019-04-02 sgerwk <sgerwk@aol.com>
* cronnext: optionally select jobs by substring
2019-03-18 Tomas Mraz <tmraz@fedoraproject.org>
* crond: Do not abort loading crontab prematurely in case of error
2019-03-18 Tomas Mraz <tmraz@fedoraproject.org>
* Release new version 1.5.4
2019-03-18 Tomas Mraz <tmraz@fedoraproject.org>
* crond: Fix regression from last release

3
INSTALL
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@ -6,6 +6,9 @@ Run the usual autotools combination of:
make
make install
If no "configure" script is present, generate it by:
./autogen.sh
The executable files will be installed in /usr/local/* by default.
Configure Options

17
Makefile.am
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@ -1,9 +1,18 @@
SUBDIRS = src man anacron
AM_CFLAGS = -I$(top_srcdir)
BUILT_SOURCES =
CLEANFILES =
EXTRA_DIST =
bin_PROGRAMS =
common_nodist =
sbin_PROGRAMS =
dist_noinst_HEADERS = \
cronie_common.h
EXTRA_DIST = \
EXTRA_DIST += \
README.anacron \
COPYING.anacron \
cronie.init \
crond.sysconfig \
contrib/anacrontab \
@ -19,3 +28,7 @@ dist_pam_DATA = pam/crond
else
EXTRA_DIST += pam/crond
endif
include anacron/Makemodule.am
include man/Makemodule.am
include src/Makemodule.am

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Makefile.in
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14
NEWS
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@ -1,10 +1,24 @@
cronie NEWS -- history of user-visible changes.
Release 1.5.5
* Explicitly validate upper end of range and step to disallow entries
such as: 1-234/5678 * * * * ....
* crond: Report missing newline before EOF in syslog so the line is not
completely silently ignored.
* crontab -l colors comment lines in a different color.
* crond: Revert "Avoid creating pid files when crond doesn't fork".
* anacron is built by default.
* Use non-recursive build.
* cronnext: Allow to optionally select jobs by substring.
Release 1.5.4
* crond: Fix regression from previous release. Only first job from a crontab
was being run.
Release 1.5.3
* Fix CVE-2019-9704 and CVE-2019-9705 to avoid local DoS of the crond.
* crontab: Make crontab without arguments fail.
* crond: In PAM configuration include system-auth instead of password-auth.

22
README
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@ -1,11 +1,13 @@
17. January 2008 mmaslano (at) redhat (dot) com
Rename the fork on cronie. The source code could be found here:
http://mmaslano.fedorapeople.org/cronie/ or git archive here:
git://git.fedorahosted.org/git/cronie.git
Cronie contains the standard UNIX daemon crond that runs specified programs at
scheduled times and related tools. The source is based on the original vixie-cron
and has security and configuration enhancements like the ability to use pam and
SELinux.
3. October 2007 mmaslano (at) redhat (dot) com
This is a clone of 'original' vixie-cron. It was used in Red Hat|Fedora
system and patched for a long time. Now was made clone tagged with
version 4.2.
Changes are mainly in git commit messages, some older changes could be
found in spec changelog (contrib/vixie-cron.spec).
And why cronie? See http://www.urbandictionary.com/define.php?term=cronie
Contact
-------
Mailing list: `cronie-devel AT lists.fedorahosted DOT org`
Bug reports and pull requests can be filled at the Github site.

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What is Anacron ?
-----------------
Anacron is a periodic command scheduler. It executes commands at
intervals specified in days. Unlike cron, it does not assume that the
system is running continuously. It can therefore be used to control
the execution of daily, weekly and monthly jobs (or anything with a
period of n days), on systems that don't run 24 hours a day. When
installed and configured properly, Anacron will make sure that the
commands are run at the specified intervals as closely as
machine-uptime permits.
Every time Anacron is run, it reads a configuration file that
specifies the jobs Anacron controls, and their periods in days. If a
job wasn't executed in the last n days, where n is the period of that
job, Anacron executes it. Anacron then records the date in a special
timestamp file that it keeps for each job, so it can know when to run
it again. When all the executed commands terminate, Anacron exits.
It is recommended to run Anacron from the system boot-scripts.
This way the jobs "whose time has come" will be run shortly after the
machine boots. A delay can be specified for each job so that the
machine isn't overloaded at boot time.
In addition to running Anacron from the boot-scripts, it is also
recommended to schedule it as a daily cron-job (usually at an early
morning hour), so that if the machine is kept running for a night,
jobs for the next day will still be executed.
Why this may be useful ?
------------------------
Most Unix-like systems have daily, weekly and monthly scripts that
take care of various "housekeeping chores" such as log-rotation,
updating the "locate" and "man" databases, etc. Daily scripts are
usually scheduled as cron-jobs to execute around 1-7 AM. Weekly
scripts are scheduled to run on Sundays. On machines that are turned
off for the night or for the weekend, these scripts rarely get run.
Anacron solves this problem. These jobs can simply be scheduled as
Anacron-jobs with periods of 1, 7 and a special target called @monthly.
What Anacron is not ?
---------------------
Anacron is not an attempt to make cron redundant. It cannot
currently be used to schedule commands at intervals smaller than days.
It also does not guarantee that the commands will be executed at any
specific day or hour.
It isn't a full-time daemon. It has to be executed from boot
scripts, from cron-jobs, or explicitly.
For more details, see the anacron(8) manpage.
Requirements
------------
- A Linux system. (maybe other *NIX systems)
- A functioning syslog daemon.
- A functioning /usr/lib/sendmail command. (all MTAs should have
that).
Compilation and Installation
----------------------------
- Untar the source package.
- Check the Makefile. Edit as required.
- Check the top of "global.h". You may want to change the syslog
facility and priorities, and the path to your MTA's sendmail
compatible command (/usr/lib/sendmail).
- cd to the directory.
- Type "make".
You can safely ignore warnings of the form: "*.d: No such file or
directory"
- Become root. Type "make install".
Setup
-----
1. Locate your system's daily, weekly and monthly cron-jobs.
See your cron documentation for more details.
2. Decide which of these jobs should be controlled by Anacron.
Remember that Anacron does not guarantee execution at any specific
day of the month, day of the week, or time of day. Jobs for which
the timing is critical should probably not be controlled by
Anacron.
3. Comment these jobs out of their crontab files. (You may have to
use the "crontab" command for this. See the cron documentation.)
4. Put them in /etc/anacrontab. Note that the format is not the same
as the crontab entries. See the anacrontab(5) manpage. Here's an
example from a typical Debian system:
-----Cut
# /etc/anacrontab example
SHELL=/bin/sh
PATH=/sbin:/bin:/usr/sbin:/usr/bin
# format: period delay job-identifier command
1 5 cron.daily run-parts /etc/cron.daily
7 10 cron.weekly run-parts /etc/cron.weekly
@monthly 15 cron.monthly run-parts /etc/cron.monthly
-----Cut
5. Put the command "anacron -s" somewhere in your boot-scripts.
Make sure that syslogd is started before this command.
6. Schedule the command "anacron -s" as a daily cron-job (preferably
at some early morning hour). This will make sure that jobs are run
when the systems is left running for a night.
That's it.
It is a good idea to check what your daily, weekly and monthly scripts
actually do, and disable any parts that may be irrelevant for your
system.
Credits
-------
Anacron was originally conceived and implemented by Christian Schwarz
<schwarz@monet.m.isar.de>.
The current implementation is a complete rewrite by Itai Tzur
<itzur@actcom.co.il>.
Current code base maintained by Sean 'Shaleh' Perry <shaleh@(debian.org|valinux.com)>.

7
anacron-paths.h Normal file
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@ -0,0 +1,7 @@
/* This file has been automatically generated. Do not edit. */
#ifndef _ANACRON_PATHS_H_
#define _ANACRON_PATHS_H_
#define ANACRON_SPOOL_DIR "/usr/local/var/spool/anacron"
#define ANACRONTAB "/usr/local/etc/anacrontab"
#endif /* _ANACRON_PATHS_H_ */

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anacron/Makefile.in
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@ -1,647 +0,0 @@
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# with or without modifications, as long as this notice is preserved.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.
@SET_MAKE@
VPATH = @srcdir@
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mostlyclean-generic pdf pdf-am ps ps-am tags tags-am uninstall \
uninstall-am uninstall-sbinPROGRAMS
.PRECIOUS: Makefile
# This header contains all the paths.
# If they are configurable, they are declared in configure script.
# Depends on this Makefile, because it uses make variables.
anacron-paths.h: Makefile
@echo 'creating $@'
@sed >$@ 's/ *\\$$//' <<\END #\
/* This file has been automatically generated. Do not edit. */ \
\
#ifndef _ANACRON_PATHS_H_ \
#define _ANACRON_PATHS_H_ \
#define ANACRON_SPOOL_DIR "$(ANACRON_SPOOL_DIR)" \
#define ANACRONTAB "$(ANACRONTAB)" \
#endif /* _ANACRON_PATHS_H_ */ \
END
# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:

32
anacron/Makefile.am → anacron/Makemodule.am
View File

@ -1,23 +1,28 @@
# Makefile.am - two binaries crond and crontab
if ANACRON
sbin_PROGRAMS = anacron
endif
sbin_PROGRAMS += anacron/anacron
anacron_anacron_SOURCES = \
anacron-paths.h \
anacron/global.h \
anacron/gregor.c \
anacron/gregor.h \
anacron/lock.c \
anacron/log.c \
anacron/main.c \
anacron/matchrx.c \
anacron/matchrx.h \
anacron/readtab.c \
anacron/runjob.c
common_nodist += anacron-paths.h
nodist_anacron_anacron_SOURCES = $(common_nodist)
BUILT_SOURCES += $(common_nodist)
anacron_SOURCES = \
gregor.c lock.c log.c main.c matchrx.c readtab.c runjob.c \
$(common_src)
common_src = global.h gregor.h matchrx.h
common_nodist = anacron-paths.h
nodist_anacron_SOURCES = $(common_nodist)
BUILT_SOURCES = $(common_nodist)
AM_CFLAGS = -I$(top_srcdir)
LDADD = $(LIBSELINUX) $(LIBPAM) $(LIBAUDIT)
anacron_anacron_LDADD = $(LIBSELINUX) $(LIBPAM) $(LIBAUDIT)
# This header contains all the paths.
# If they are configurable, they are declared in configure script.
# Depends on this Makefile, because it uses make variables.
CLEANFILES += anacron-paths.h
anacron-paths.h: Makefile
@echo 'creating $@'
@sed >$@ 's/ *\\$$//' <<\END #\
@ -29,3 +34,4 @@ anacron-paths.h: Makefile
#define ANACRONTAB "$(ANACRONTAB)" \
#endif /* _ANACRON_PATHS_H_ */ \
END
endif

7
anacron/log.c
View File

@ -79,7 +79,12 @@ make_msg(const char *fmt, va_list args)
/* There's some confusion in the documentation about what vsnprintf
* returns when the buffer overflows. Hmmm... */
len = vsnprintf(msg, sizeof(msg), fmt, args);
if (len >= sizeof(msg) - 1)
if (len < 0) {
strncpy(msg, "(vsnprintf failed)", sizeof(msg));
msg[sizeof(msg) - 1] = '\0';
return;
}
if ((size_t) len >= sizeof(msg) - 1)
strcpy(msg + sizeof(msg) - sizeof(truncated), truncated);
}

4
anacron/matchrx.c
View File

@ -42,11 +42,13 @@ match_rx(const char *rx, char *string, unsigned int n_sub, /* char **substrings
* This is not the most efficient, or elegant way of doing this.
*/
{
int r, n;
int r;
unsigned int n;
regex_t crx;
va_list va;
char **substring;
regmatch_t *sub_offsets;
sub_offsets = malloc(sizeof(regmatch_t) * (n_sub + 1));
if (sub_offsets == NULL)
return -1;

4
anacron/runjob.c
View File

@ -53,7 +53,9 @@ temp_file(job_rec *jr)
dir = P_tmpdir;
len = snprintf(template, sizeof(template), "%s/$anacronXXXXXX", dir);
if (len >= sizeof(template))
if (len < 0)
die_e("snprintf failed");
else if ((size_t) len >= sizeof(template))
die_e("TMPDIR too long");
fdout = mkstemp(template);

29
configure vendored
View File

@ -1,6 +1,6 @@
#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for cronie 1.5.4.
# Generated by GNU Autoconf 2.69 for cronie 1.5.5.
#
# Report bugs to <mmaslano@redhat.com,tmraz@fedoraproject.org>.
#
@ -580,8 +580,8 @@ MAKEFLAGS=
# Identity of this package.
PACKAGE_NAME='cronie'
PACKAGE_TARNAME='cronie'
PACKAGE_VERSION='1.5.4'
PACKAGE_STRING='cronie 1.5.4'
PACKAGE_VERSION='1.5.5'
PACKAGE_STRING='cronie 1.5.5'
PACKAGE_BUGREPORT='mmaslano@redhat.com,tmraz@fedoraproject.org'
PACKAGE_URL=''
@ -1307,7 +1307,7 @@ if test "$ac_init_help" = "long"; then
# Omit some internal or obsolete options to make the list less imposing.
# This message is too long to be a string in the A/UX 3.1 sh.
cat <<_ACEOF
\`configure' configures cronie 1.5.4 to adapt to many kinds of systems.
\`configure' configures cronie 1.5.5 to adapt to many kinds of systems.
Usage: $0 [OPTION]... [VAR=VALUE]...
@ -1377,7 +1377,7 @@ fi
if test -n "$ac_init_help"; then
case $ac_init_help in
short | recursive ) echo "Configuration of cronie 1.5.4:";;
short | recursive ) echo "Configuration of cronie 1.5.5:";;
esac
cat <<\_ACEOF
@ -1396,7 +1396,7 @@ CRONIE_HELP_STRING(--enable-relro,Build cronie with relro flag)
BSD_STRING(--enable-bsd,Build cronie with BSD specific parts)
--enable-pam Alias for --with-pam
--enable-syscrontab Build cronie with system crontab enabled.
--enable-anacron Build also anacron.
--disable-anacron Do not build anacron.
Optional Packages:
--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
@ -1497,7 +1497,7 @@ fi
test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
cat <<\_ACEOF
cronie configure 1.5.4
cronie configure 1.5.5
generated by GNU Autoconf 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
@ -1977,7 +1977,7 @@ cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
It was created by cronie $as_me 1.5.4, which was
It was created by cronie $as_me 1.5.5, which was
generated by GNU Autoconf 2.69. Invocation command line was
$ $0 $@
@ -2844,7 +2844,7 @@ fi
# Define the identity of the package.
PACKAGE='cronie'
VERSION='1.5.4'
VERSION='1.5.5'
cat >>confdefs.h <<_ACEOF
@ -5400,6 +5400,8 @@ fi
# Check whether --enable-anacron was given.
if test "${enable_anacron+set}" = set; then :
enableval=$enable_anacron;
else
enable_anacron=yes
fi
if test "$enable_anacron" = yes; then
@ -5423,7 +5425,7 @@ if test "$ANACRONTAB" = ""; then
fi
ac_config_files="$ac_config_files Makefile src/Makefile man/Makefile anacron/Makefile"
ac_config_files="$ac_config_files Makefile"
cat >confcache <<\_ACEOF
# This file is a shell script that caches the results of configure
@ -5963,7 +5965,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by cronie $as_me 1.5.4, which was
This file was extended by cronie $as_me 1.5.5, which was
generated by GNU Autoconf 2.69. Invocation command line was
CONFIG_FILES = $CONFIG_FILES
@ -6029,7 +6031,7 @@ _ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
cronie config.status 1.5.4
cronie config.status 1.5.5
configured by $0, generated by GNU Autoconf 2.69,
with options \\"\$ac_cs_config\\"
@ -6161,9 +6163,6 @@ do
"config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h" ;;
"depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
"Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
"src/Makefile") CONFIG_FILES="$CONFIG_FILES src/Makefile" ;;
"man/Makefile") CONFIG_FILES="$CONFIG_FILES man/Makefile" ;;
"anacron/Makefile") CONFIG_FILES="$CONFIG_FILES anacron/Makefile" ;;
*) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
esac

8
configure.ac
View File

@ -1,8 +1,8 @@
AC_INIT([cronie],[1.5.4],[mmaslano@redhat.com,tmraz@fedoraproject.org])
AC_INIT([cronie],[1.5.5],[mmaslano@redhat.com,tmraz@fedoraproject.org])
AC_CONFIG_HEADER([config.h])
AC_PREREQ(2.60)
AM_INIT_AUTOMAKE
AM_INIT_AUTOMAKE([subdir-objects])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])],
[AC_SUBST([AM_DEFAULT_VERBOSITY], [1])])
@ -253,13 +253,13 @@ CRONIE_CONF_VAR([SYSCRONTAB], [the current working directory of the running daem
CRONIE_CONF_VAR([SYS_CROND_DIR], [the current working directory of the running daemon], [${sysconfdir}/cron.d])
CRONIE_CONF_VAR([SPOOL_DIR], [the directory where all the user cron tabs reside], [${localstatedir}/spool/cron])
AC_ARG_ENABLE([anacron], [AS_HELP_STRING([--enable-anacron], [Build also anacron.])])
AC_ARG_ENABLE([anacron], [AS_HELP_STRING([--disable-anacron], [Do not build anacron.])], [], [enable_anacron=yes])
AM_CONDITIONAL([ANACRON], [test "$enable_anacron" = yes])
if test "$enable_anacron" != no; then
ANACRON_CONF_VAR([ANACRON_SPOOL_DIR],[The path for anacron locks.],[${localstatedir}/spool/anacron])
ANACRON_CONF_VAR([ANACRONTAB],[The anacron table for regular jobs.],[${sysconfdir}/anacrontab])
fi
AC_CONFIG_FILES([Makefile src/Makefile man/Makefile anacron/Makefile])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT

2
contrib/0anacron
View File

@ -9,7 +9,7 @@ fi
# Do not run jobs when on battery power
online=1
for psupply in AC ADP0 ; do
for psupply in AC ADP{0..9} ; do
sysfile="/sys/class/power_supply/$psupply/online"
if [ -f $sysfile ] ; then

6
man/Makefile.am
View File

@ -1,6 +0,0 @@
dist_man_MANS = crontab.1 crontab.5 cron.8 crond.8 cronnext.1
EXTRA_DIST = anacrontab.5 anacron.8
if ANACRON
dist_man_MANS += $(EXTRA_DIST)
endif

593
man/Makefile.in
View File

@ -1,593 +0,0 @@
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16
man/Makemodule.am Normal file
View File

@ -0,0 +1,16 @@
dist_man_MANS = \
man/cron.8 \
man/crond.8 \
man/cronnext.1 \
man/crontab.1 \
man/crontab.5
anacron_man = \
man/anacrontab.5 \
man/anacron.8
EXTRA_DIST += $(anacron_man)
if ANACRON
dist_man_MANS += $(anacron_man)
endif

5
man/cronnext.1
View File

@ -6,7 +6,7 @@ cronnext \- time of next job cron will execute
.B cronnext
[\fB-i \fIusers\fR] [\fB-e \fIusers\fR] [\fB-s\fR]
[\fB-a\fR]
[\fB-t \fItime\fR] [\fB-q \fItime\fR]
[\fB-t \fItime\fR] [\fB-q \fItime\fR] [\fB-j \fIcommand\fR]
[\fB-l\fR] [\fB-c\fR] [\fB-f\fR] [\fB-h\fR] [\fB-V\fR]
[file]...
.SH DESCRIPTION
@ -52,6 +52,9 @@ and is internally rounded to the minute.
Do not check jobs over this time, expressed in the same way as in option
.BR -t .
.TP
.BI "\-j " command
Only look for jobs that contain \fIcommand\fP as a substring.
.TP
.B \-l
Print the whole entries of the jobs that are the next to be executed by cron.
The default is to only print their next time of execution.

53
man/crontab.1
View File

@ -22,7 +22,7 @@
.\"
.\" $Id: crontab.1,v 1.7 2004/01/23 19:03:32 vixie Exp $
.\"
.TH CRONTAB 1 "2012-11-22" "cronie" "User Commands"
.TH CRONTAB 1 "2019-10-29" "cronie" "User Commands"
.SH NAME
crontab \- maintains crontab files for individual users
.SH SYNOPSIS
@ -67,18 +67,21 @@ it is possible to use a network-mounted shared
across a cluster of hosts and specify that only one of the hosts should
run the crontab jobs in the particular directory at any one time. You
may also use
.BR crontab (1)
.BR crontab
from any of these hosts to edit the same shared set of crontab files, and
to set and query which host should run the crontab jobs.
.PP
Running cron jobs can be allowed or disallowed for different users. For
this purpose, use the
Scheduling cron jobs with
.BR crontab
can be allowed or disallowed for different users. For this purpose, use the
.I cron.allow
and
.I cron.deny
files. If the
.I cron.allow
file exists, a user must be listed in it to be allowed to use cron If the
file exists, a user must be listed in it to be allowed to use
.BR crontab .
If the
.I cron.allow
file does not exist but the
.I cron.deny
@ -86,12 +89,17 @@ file does exist, then a user must
.I not
be listed in the
.I cron.deny
file in order to use cron. If neither of these files exists, only the
super user is allowed to use cron. Another way to restrict access to
cron is to use PAM authentication in
file in order to use
.BR crontab.
If neither of these files exist, then only the super user is allowed to use
.BR crontab .
.PP
Another way to restrict the scheduling of cron jobs beyond
.BR crontab
is to use PAM authentication in
.I /etc/security/access.conf
to set up users, which are allowed or disallowed to use
.I crontab
.BR crontab
or modify system cron jobs in the
.IR /etc/cron.d/
directory.
@ -106,12 +114,12 @@ directory is used.
.B "\-u"
Specifies the name of the user whose crontab is to be modified. If this
option is not used,
.I crontab
.BR crontab
examines "your" crontab, i.e., the crontab of the person executing the
command. If no crontab exists for a particular user, it is created for
him the first time the
them the first time the
.B crontab -u
command is used under his username.
command is used under their username.
.TP
.B "\-l"
Displays the current crontab on standard output.
@ -178,6 +186,27 @@ option.
.TP
.B "\-V"
Print version and exit.
.SH CAVEATS
The files
.I cron.allow
and
.I cron.deny
cannot be used to restrict the execution of cron jobs; they only restrict the
use of
.BR crontab .
In particular, restricting access to
.BR crontab
has no effect on an existing
.I crontab
of a user. Its jobs will continue to be executed until the crontab is removed.
.PP
The files
.I cron.allow
and
.I cron.deny
must be readable by the user invoking
.BR crontab .
If this is not the case, then they are treated as non-existent.
.SH "SEE ALSO"
.BR crontab (5),
.BR cron (8)

5
man/crontab.5
View File

@ -326,6 +326,11 @@ option on the crond command line. If inotify support is in use, changes
in the symlinked crontabs are not automatically noticed by the cron
daemon. The cron daemon must receive a SIGHUP signal to reload the
crontabs. This is a limitation of the inotify API.
.PP
cron requires that each entry in a crontab end in a newline character. If the
last entry in a crontab is missing a newline (i.e.\& terminated by EOF),
cron will consider the crontab (at least partially) broken.
A warning will be written to syslog.
.SH AUTHOR
.MT vixie@isc.org
Paul Vixie

788
src/Makefile.in
View File

@ -1,788 +0,0 @@
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/* SPOOLDIR is where the crontabs live. \
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* exists, and does not just contain a line matching \
* the name returned by gethostname(), causes all \
* crontabs in SPOOL_DIR to be ignored. This is \
* intended to be used when clustering hosts sharing \
* one NFS-mounted SPOOL_DIR, and where only one host \
* should use the crontab files here at any one time. \
*/ \
#define CRON_HOSTNAME ".cron.hostname" \
\
/* cron allow/deny file. At least cron.deny must \
* exist for ordinary users to run crontab. \
*/ \
#define CRON_ALLOW "$(sysconfdir)/cron.allow" \
#define CRON_DENY "$(sysconfdir)/cron.deny" \
\
/* 4.3BSD-style crontab f.e. /etc/crontab */ \
#define SYSCRONTAB "$(SYSCRONTAB)" \
\
/* system crontab dir f.e. /etc/cron.d/ */ \
#define SYS_CROND_DIR "$(SYS_CROND_DIR)" \
\
#define SYSCONFDIR "$(sysconfdir)" \
\
#endif /* _CRON_PATHS_H_ */ \
END
# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:

64
src/Makefile.am → src/Makemodule.am
View File

@ -1,27 +1,55 @@
# Makefile.am - two binaries crond and crontab
sbin_PROGRAMS = crond
bin_PROGRAMS = crontab cronnext
sbin_PROGRAMS += \
src/crond
crond_SOURCES = \
cron.c database.c user.c job.c do_command.c popen.c security.c \
bin_PROGRAMS += \
src/cronnext \
src/crontab
src_crond_SOURCES = \
src/cron.c \
src/database.c \
src/do_command.c \
src/job.c \
src/popen.c \
src/security.c \
src/user.c \
$(common_src)
crontab_SOURCES = crontab.c security.c $(common_src)
cronnext_SOURCES = \
cronnext.c database.c user.c job.c \
src_crontab_SOURCES = \
src/crontab.c \
src/security.c \
$(common_src)
common_src = entry.c env.c misc.c pw_dup.c \
externs.h funcs.h globals.h macros.h pathnames.h structs.h \
bitstring.h
common_nodist = cron-paths.h
nodist_crond_SOURCES = $(common_nodist)
nodist_crontab_SOURCES = $(common_nodist)
nodist_cronnext_SOURCES = $(common_nodist)
BUILT_SOURCES = $(common_nodist)
AM_CFLAGS = -I$(top_srcdir)
src_cronnext_SOURCES = \
src/cronnext.c \
src/database.c \
src/job.c \
src/user.c \
$(common_src)
LDADD = $(LIBSELINUX) $(LIBPAM) $(LIBAUDIT)
common_src = \
src/bitstring.h \
src/entry.c \
src/env.c \
src/externs.h \
src/funcs.h \
src/globals.h \
src/macros.h \
src/misc.c \
src/pathnames.h \
src/pw_dup.c \
src/structs.h
common_nodist += cron-paths.h
nodist_src_crond_SOURCES = $(common_nodist)
nodist_src_crontab_SOURCES = $(common_nodist)
nodist_src_cronnext_SOURCES = $(common_nodist)
BUILT_SOURCES += $(common_nodist)
src_crond_LDADD = $(LIBSELINUX) $(LIBPAM) $(LIBAUDIT)
src_crontab_LDADD = $(LIBSELINUX) $(LIBPAM) $(LIBAUDIT)
## if DEBUG
## noinst_PROGRAMS = debug
@ -31,7 +59,7 @@ LDADD = $(LIBSELINUX) $(LIBPAM) $(LIBAUDIT)
# If they are configurable, they are declared in configure script.
# Depends on this Makefile, because it uses make variables.
# CCD 2010/09/10 added CRON_HOSTNAME for clustered-cron.
CLEANFILES = cron-paths.h
CLEANFILES += cron-paths.h
cron-paths.h: Makefile
@echo 'creating $@'
@sed >$@ 's/ *\\$$//' <<\END #\

13
src/cron.c
View File

@ -68,8 +68,9 @@ find_jobs(int, cron_db *, int, int, long),
set_time(int),
cron_sleep(int, cron_db *),
sigchld_handler(int),
sighup_handler(int),
sigchld_reaper(void), sigintterm_handler(int), parse_args(int c, char *v[]);
sighup_handler(int ATTRIBUTE_UNUSED),
sigchld_reaper(void),
sigintterm_handler(int ATTRIBUTE_UNUSED), parse_args(int c, char *v[]);
static volatile sig_atomic_t got_sighup, got_sigchld, got_sigintterm;
static int timeRunning, virtualTime, clockTime;
@ -261,7 +262,7 @@ int main(int argc, char *argv[]) {
*/
setlocale(LC_ALL, ""); /* set locale to system defaults or to
* that specified by any LC_* env vars */
if ((cs = nl_langinfo(CODESET)) != 0L)
if ((cs = nl_langinfo(CODESET)) != NULL)
strncpy(cron_default_mail_charset, cs, MAX_ENVSTR-1);
else
strcpy(cron_default_mail_charset, "US-ASCII");
@ -651,15 +652,15 @@ static void cron_sleep(int target, cron_db * db) {
}
}
static void sighup_handler(int x) {
static void sighup_handler(int x ATTRIBUTE_UNUSED) {
got_sighup = 1;
}
static void sigchld_handler(int x) {
static void sigchld_handler(int x ATTRIBUTE_UNUSED) {
got_sigchld = 1;
}
static void sigintterm_handler(int x) {
static void sigintterm_handler(int x ATTRIBUTE_UNUSED) {
got_sigintterm = 1;
}

37
src/cronnext.c
View File

@ -25,6 +25,8 @@
#define MAIN_PROGRAM
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <string.h>
#include <pwd.h>
@ -81,7 +83,7 @@ const char *flagname[]= {
};
void printflags(char *indent, int flags) {
int f;
size_t f;
int first = 1;
printf("%s flagnames:", indent);
@ -197,11 +199,11 @@ time_t nextmatch(entry *e, time_t start, time_t end) {
/*
* match a user against a list
*/
int matchuser(char *user, char *list) {
int matchuser(char *user_name, char *list) {
char *pos;
size_t l = strlen(user);
size_t l = strlen(user_name);
for (pos = list; (pos = strstr(pos, user)) != NULL; pos += l) {
for (pos = list; (pos = strstr(pos, user_name)) != NULL; pos += l) {
if ((pos != list) && (*(pos - 1) != ','))
continue;
if ((pos[l] != '\0') && (pos[l] != ','))
@ -216,7 +218,7 @@ int matchuser(char *user, char *list) {
*/
time_t cronnext(cron_db database,
time_t start, time_t end,
char *include, char *exclude, int flags) {
char *include, char *exclude, char *command, int flags) {
time_t closest, next;
user *u;
entry *e;
@ -242,7 +244,9 @@ time_t cronnext(cron_db database,
if (flags & CRONTABS)
printcrontab(u);
for (e = u->crontab; e; e = e->next)
for (e = u->crontab; e; e = e->next) {
if (command && strstr(e->cmd, command) == NULL)
continue;
for (next = nextmatch(e, start, end);
next <= end;
next = nextmatch(e, next + 60, end)) {
@ -255,6 +259,7 @@ time_t cronnext(cron_db database,
if (! (flags & ALLJOBS))
break;
}
}
}
return closest;
@ -267,6 +272,7 @@ cron_db database(int installed, char **additional) {
cron_db db = {NULL, NULL, (time_t) 0};
struct passwd pw;
int fd;
struct stat ss;
user *u;
if (installed)
@ -278,6 +284,12 @@ cron_db database(int installed, char **additional) {
perror(*additional);
continue;
}
fstat(fd, &ss);
if (S_ISDIR(ss.st_mode)) {
fprintf(stderr, "%s is a directory - skipping\n", *additional);
close(fd);
continue;
}
memset(&pw, 0, sizeof(pw));
pw.pw_name = *additional;
pw.pw_passwd = "";
@ -305,6 +317,7 @@ void usage() {
fprintf(stderr, " -a examine installed crontabs even if files are given\n");
fprintf(stderr, " -t time start from this time (seconds since epoch)\n");
fprintf(stderr, " -q time end check at this time (seconds since epoch)\n");
fprintf(stderr, " -j cmd only check jobs that contain cmd as a substring\n");
fprintf(stderr, " -l print next jobs to be executed\n");
fprintf(stderr, " -c print next execution of each job\n");
fprintf(stderr, " -f print all jobs executed in the given interval\n");
@ -317,7 +330,7 @@ void usage() {
*/
int main(int argn, char *argv[]) {
int opt;
char *include, *exclude;
char *include, *exclude, *command;
int flags;
time_t start, next, end = 0;
int endtime, printjobs;
@ -326,12 +339,13 @@ int main(int argn, char *argv[]) {
include = NULL;
exclude = NULL;
command = NULL;
flags = SYSTEM;
endtime = 0;
printjobs = 0;
start = time(NULL) / 60 * 60;
while (-1 != (opt = getopt(argn, argv, "i:e:ast:q:lcfhV"))) {
while (-1 != (opt = getopt(argn, argv, "i:e:ast:q:j:lcfhV"))) {
switch (opt) {
case 'i':
include = optarg;
@ -352,6 +366,9 @@ int main(int argn, char *argv[]) {
end = atoi(optarg) / 60 * 60;
endtime = 1;
break;
case 'j':
command = optarg;
break;
case 'l':
printjobs = 1;
break;
@ -399,7 +416,7 @@ int main(int argn, char *argv[]) {
db = database(installed || argv[optind] == NULL, argv + optind);
/* find time of next scheduled command */
next = cronnext(db, start, end, include, exclude, flags);
next = cronnext(db, start, end, include, exclude, command, flags);
/* print time */
if (next == -1)
@ -410,7 +427,7 @@ int main(int argn, char *argv[]) {
/* print next jobs */
if (printjobs) {
printf("nextjobs:\n");
cronnext(db, next, next, include, exclude, (flags & SYSTEM) | ENTRIES);
cronnext(db, next, next, include, exclude, command, (flags & SYSTEM) | ENTRIES);
}
return EXIT_SUCCESS;

32
src/crontab.c
View File

@ -66,6 +66,9 @@
#define NHEADER_LINES 0
#define COMMENT_COLOR "\x1B[34m"
#define RESET_COLOR "\033[0m"
enum opt_t {opt_unknown, opt_list, opt_delete, opt_edit, opt_replace, opt_hostset, opt_hostget};
#if DEBUGGING
@ -392,6 +395,8 @@ static void list_cmd(void) {
char n[MAX_FNAME];
FILE *f;
int ch;
const int is_tty = isatty(STDOUT);
int new_line = 1;
log_it(RealUser, Pid, "LIST", User, 0);
if (!glue_strings(n, sizeof n, SPOOL_DIR, User, '/')) {
@ -409,8 +414,18 @@ static void list_cmd(void) {
/* file is open. copy to stdout, close.
*/
Set_LineNum(1)
while (EOF != (ch = get_char(f)))
while (EOF != (ch = get_char(f))) {
if (is_tty && new_line) {
if (ch == '#') {
fputs(COMMENT_COLOR, stdout);
}
else {
fputs(RESET_COLOR, stdout);
}
}
putchar(ch);
new_line = ch == '\n';
}
fclose(f);
}
@ -419,7 +434,7 @@ static void delete_cmd(void) {
if (PromptOnDelete == 1) {
printf("crontab: really delete %s's crontab? ", User);
fflush(stdout);
if ((fgets(n, MAX_FNAME - 1, stdin) == 0L)
if ((fgets(n, MAX_FNAME - 1, stdin) == NULL)
|| ((n[0] != 'Y') && (n[0] != 'y'))
)
exit(0);
@ -700,7 +715,7 @@ static void edit_cmd(void) {
perror("swapping uids back");
exit(ERROR_EXIT);
}
if (NewCrontab == 0L) {
if (NewCrontab == NULL) {
perror("fopen");
goto fatal;
}
@ -709,10 +724,10 @@ static void edit_cmd(void) {
break;
case -1:
for (;;) {
printf("Do you want to retry the same edit? ");
printf("Do you want to retry the same edit? (Y/N) ");
fflush(stdout);
q[0] = '\0';
if (fgets(q, sizeof q, stdin) == 0L)
if (fgets(q, sizeof q, stdin) == NULL)
continue;
switch (q[0]) {
case 'y':
@ -803,15 +818,14 @@ static int replace_cmd(void) {
error = -2;
goto done;
}
fflush(tmp);
rewind(tmp);
if (ferror(tmp)) {
if (ferror(tmp) || fflush(tmp) || fsync(fileno(tmp))) {
fprintf(stderr, "%s: error while writing new crontab to %s\n",
ProgramName, TempFilename);
fclose(tmp);
error = -2;
goto done;
}
rewind(tmp);
/* check the syntax of the file being installed.
*/
@ -1041,7 +1055,7 @@ static void poke_daemon(void) {
}
}
static void die(int x) {
static void die(int x ATTRIBUTE_UNUSED) {
if (TempFilename[0])
(void) unlink(TempFilename);
_exit(ERROR_EXIT);

3
src/database.c
View File

@ -48,9 +48,6 @@
#include "globals.h"
#include "pathnames.h"
#define TMAX(a,b) ((a)>(b)?(a):(b))
#define TMIN(a,b) ((a)<(b)?(a):(b))
/* size of the event structure, not counting name */
#define EVENT_SIZE (sizeof (struct inotify_event))

24
src/do_command.c
View File

@ -46,7 +46,7 @@ static int safe_p(const char *, const char *);
void do_command(entry * e, user * u) {
pid_t pid = getpid();
int ev;
char **jobenv = 0L;
char **jobenv = NULL;
Debug(DPROC, ("[%ld] do_command(%s, (%s,%ld,%ld))\n",
(long) pid, e->cmd, u->name,
@ -238,7 +238,7 @@ static int child_process(entry * e, char **jobenv) {
*/
{
char *shell = env_get("SHELL", jobenv);
int fd, fdmax = getdtablesize();
int fd, fdmax = TMIN(getdtablesize(), MAX_CLOSE_FD);
/* close all unwanted open file descriptors */
for(fd = STDERR + 1; fd < fdmax; fd++) {
@ -427,8 +427,14 @@ static int child_process(entry * e, char **jobenv) {
gethostname(hostname, MAXHOSTNAMELEN);
if (MailCmd[0] == '\0') {
if (snprintf(mailcmd, sizeof mailcmd, MAILFMT, MAILARG, mailfrom)
>= sizeof mailcmd) {
int len;
len = snprintf(mailcmd, sizeof mailcmd, MAILFMT, MAILARG, mailfrom);
if (len < 0) {
fprintf(stderr, "mailcmd snprintf failed\n");
(void) _exit(ERROR_EXIT);
}
if (sizeof mailcmd <= (size_t) len) {
fprintf(stderr, "mailcmd too long\n");
(void) _exit(ERROR_EXIT);
}
@ -450,7 +456,7 @@ static int child_process(entry * e, char **jobenv) {
fprintf(mail, "Date: %s\n", arpadate(&StartTime));
#endif /*MAIL_DATE */
fprintf(mail, "MIME-Version: 1.0\n");
if (content_type == 0L) {
if (content_type == NULL) {
fprintf(mail, "Content-Type: text/plain; charset=%s\n",
cron_default_mail_charset);
}
@ -461,17 +467,17 @@ static int child_process(entry * e, char **jobenv) {
char *nl = content_type;
size_t ctlen = strlen(content_type);
while ((*nl != '\0')
&& ((nl = strchr(nl, '\n')) != 0L)
&& ((nl = strchr(nl, '\n')) != NULL)
&& (nl < (content_type + ctlen))
)
*nl = ' ';
fprintf(mail, "Content-Type: %s\n", content_type);
}
if (content_transfer_encoding != 0L) {
if (content_transfer_encoding != NULL) {
char *nl = content_transfer_encoding;
size_t ctlen = strlen(content_transfer_encoding);
while ((*nl != '\0')
&& ((nl = strchr(nl, '\n')) != 0L)
&& ((nl = strchr(nl, '\n')) != NULL)
&& (nl < (content_transfer_encoding + ctlen))
)
*nl = ' ';
@ -500,6 +506,8 @@ static int child_process(entry * e, char **jobenv) {
*/
while (EOF != (ch = getc(in))) {
if (ch == '\r')
continue;
bytes++;
if (mail)
putc(ch, mail);

7
src/entry.c
View File

@ -548,6 +548,13 @@ get_range(bitstr_t * bits, int low, int high, const char *names[],
num3 = 1;
}
/* num1 (through i) will be validated by set_element() below, but num2
* and num3 are merely used as loop condition and increment, and must
* be validated separately.
*/
if (num2 < low || num2 > high || num3 > high)
return (EOF);
/* range. set all elements from num1 to num2, stepping
* by num3. (the step is a downward-compatible extension
* proposed conceptually by bob@acornrc, syntactically

3
src/env.c
View File

@ -23,6 +23,7 @@
#include <ctype.h>
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
@ -281,7 +282,7 @@ char *env_get(const char *name, char **envp) {
while ((p = *envp++) != NULL) {
if (!(q = strchr(p, '=')))
continue;
if ((q - p) == len && !strncmp(p, name, len))
if ((size_t)(q - p) == len && !strncmp(p, name, len))
return (q + 1);
}
return (NULL);

4
src/macros.h
View File

@ -61,6 +61,7 @@
#define MAX_USER_ENVS 1000 /* maximum environment variables in user's crontab */
#define MAX_USER_ENTRIES 1000 /* maximum crontab entries in user's crontab */
#define MAX_GARBAGE 32768 /* max num of chars of comments and whitespaces between entries */
#define MAX_CLOSE_FD 10000 /* max fd num to close when spawning a child process */
/* NOTE: these correspond to DebugFlagNames,
* defined below.
@ -129,6 +130,9 @@
#define LAST_DOW 7
#define DOW_COUNT (LAST_DOW - FIRST_DOW + 1)
#define TMAX(a,b) ((a)>(b)?(a):(b))
#define TMIN(a,b) ((a)<(b)?(a):(b))
/*
* Because crontab/at files may be owned by their respective users we
* take extreme care in opening them. If the OS lacks the O_NOFOLLOW

73
src/misc.c
View File

@ -315,9 +315,6 @@ void acquire_daemonlock(int closeflag) {
return;
}
if (NoFork == 1)
return; //move along, nothing to do here...
if (fd == -1) {
pidfile = _PATH_CRON_PID;
/* Initial mode is 0600 to prevent flock() race/DoS. */
@ -460,76 +457,6 @@ int skip_comments(FILE * file) {
return TRUE;
}
/* int in_file(const char *string, FILE *file, int error)
* return TRUE if one of the lines in file matches string exactly,
* FALSE if no lines match, and error on error.
*/
static int in_file(const char *string, FILE * file, int error) {
char line[MAX_TEMPSTR];
char *endp;
if (fseek(file, 0L, SEEK_SET))
return (error);
while (fgets(line, MAX_TEMPSTR, file)) {
if (line[0] != '\0') {
endp = &line[strlen(line) - 1];
if (*endp != '\n')
return (error);
*endp = '\0';
if (0 == strcmp(line, string))
return (TRUE);
}
}
if (ferror(file))
return (error);
return (FALSE);
}
/* int allowed(const char *username, const char *allow_file, const char *deny_file)
* returns TRUE if (allow_file exists and user is listed)
* or (deny_file exists and user is NOT listed).
* root is always allowed.
*/
int allowed(const char *username, const char *allow_file,
const char *deny_file) {
FILE *fp;
int isallowed;
char buf[128];
if (getuid() == 0)
return TRUE;
isallowed = FALSE;
if ((fp = fopen(allow_file, "r")) != NULL) {
isallowed = in_file(username, fp, FALSE);
fclose(fp);
if ((getuid() == 0) && (!isallowed)) {
snprintf(buf, sizeof (buf),
"root used -u for user %s not in cron.allow", username);
log_it("crontab", getpid(), "warning", buf, 0);
isallowed = TRUE;
}
}
else if ((fp = fopen(deny_file, "r")) != NULL) {
isallowed = !in_file(username, fp, FALSE);
fclose(fp);
if ((getuid() == 0) && (!isallowed)) {
snprintf(buf, sizeof (buf),
"root used -u for user %s in cron.deny", username);
log_it("crontab", getpid(), "warning", buf, 0);
isallowed = TRUE;
}
}
#ifdef WITH_AUDIT
if (isallowed == FALSE) {
int audit_fd = audit_open();
audit_log_user_message(audit_fd, AUDIT_USER_START, "cron deny",
NULL, NULL, NULL, 0);
close(audit_fd);
}
#endif
return (isallowed);
}
void log_it(const char *username, PID_T xpid, const char *event,
const char *detail, int err) {
#if defined(LOG_FILE) || DEBUGGING

14
src/popen.c
View File

@ -81,12 +81,19 @@ FILE *cron_popen(char *program, const char *type, struct passwd *pw, char **jobe
if (!pids) {
if ((fds = getdtablesize()) <= 0)
return (NULL);
if (fds > MAX_CLOSE_FD)
fds = MAX_CLOSE_FD; /* avoid allocating too much memory */
if (!(pids = (PID_T *) malloc((u_int) ((size_t)fds * sizeof (PID_T)))))
return (NULL);
memset((char *) pids, 0, (size_t)fds * sizeof (PID_T));
}
if (pipe(pdes) < 0)
return (NULL);
if (pdes[0] >= fds || pdes[1] >= fds) {
(void) close(pdes[0]);
(void) close(pdes[1]);
return NULL;
}
/* break up string into pieces */
for (argc = 0, cp = program; argc < MAX_ARGS; cp = NULL)
@ -145,14 +152,16 @@ FILE *cron_popen(char *program, const char *type, struct passwd *pw, char **jobe
}
/* parent; assume fdopen can't fail... */
if (*type == 'r') {
fd = pdes[0];
iop = fdopen(pdes[0], type);
(void) close(pdes[1]);
}
else {
fd = pdes[1];
iop = fdopen(pdes[1], type);
(void) close(pdes[0]);
}
pids[fileno(iop)] = pid;
pids[fd] = pid;
pfree:
return (iop);
@ -168,7 +177,8 @@ int cron_pclose(FILE * iop) {
* pclose returns -1 if stream is not associated with a
* `popened' command, or, if already `pclosed'.
*/
if (pids == 0 || pids[fdes = fileno(iop)] == 0)
fdes = fileno(iop);
if (pids == NULL || fdes >= fds || pids[fdes] == 0L)
return (-1);
(void) fclose(iop);

85
src/security.c
View File

@ -120,7 +120,7 @@ int cron_set_job_security_context(entry *e, user *u ATTRIBUTE_UNUSED,
/* "minute-ly" job: Every minute for given hour/dow/month/dom.
* Ensure that these jobs never run in the same minute:
*/
minutely_time = time(0);
minutely_time = time(NULL);
Debug(DSCH, ("Minute-ly job. Recording time %lu\n", minutely_time));
}
@ -169,7 +169,7 @@ int cron_set_job_security_context(entry *e, user *u ATTRIBUTE_UNUSED,
*jobenv = build_env(e->envp);
time_t job_run_time = time(0L);
time_t job_run_time = time(NULL);
if ((minutely_time > 0) && ((job_run_time / 60) != (minutely_time / 60))) {
/* if a per-minute job is delayed into the next minute
@ -350,12 +350,12 @@ cron_get_job_range(user * u, security_context_t * ucontextp, char **jobenv) {
if (is_selinux_enabled() <= 0)
return 0;
if (ucontextp == 0L)
if (ucontextp == NULL)
return -1;
*ucontextp = 0L;
*ucontextp = NULL;
if ((range = env_get("MLS_LEVEL", jobenv)) != 0L) {
if ((range = env_get("MLS_LEVEL", jobenv)) != NULL) {
context_t ccon;
if (!(ccon = context_new(u->scontext))) {
log_it(u->name, getpid(), "context_new FAILED for MLS_LEVEL",
@ -404,7 +404,7 @@ static int cron_change_selinux_range(user * u, security_context_t ucontext) {
if (is_selinux_enabled() <= 0)
return 0;
if (u->scontext == 0L) {
if (u->scontext == NULL) {
if (security_getenforce() > 0) {
log_it(u->name, getpid(), "NULL security context for user", "", 0);
return -1;
@ -592,7 +592,7 @@ get_security_context(const char *name, int crontab_fd,
void free_security_context(security_context_t * scontext) {
if (*scontext != NULL) {
freecon(*scontext);
*scontext = 0L;
*scontext = NULL;
}
}
#endif
@ -675,3 +675,74 @@ static char **build_env(char **cronenv) {
return jobenv;
#endif
}
/* int in_file(const char *string, FILE *file, int error)
* return TRUE if one of the lines in file matches string exactly,
* FALSE if no lines match, and error on error.
*/
static int in_file(const char *string, FILE * file, int error) {
char line[MAX_TEMPSTR];
char *endp;
if (fseek(file, 0L, SEEK_SET))
return (error);
while (fgets(line, MAX_TEMPSTR, file)) {
if (line[0] != '\0') {
endp = &line[strlen(line) - 1];
if (*endp != '\n')
return (error);
*endp = '\0';
if (0 == strcmp(line, string))
return (TRUE);
}
}
if (ferror(file))
return (error);
return (FALSE);
}
/* int allowed(const char *username, const char *allow_file, const char *deny_file)
* returns TRUE if (allow_file exists and user is listed)
* or (deny_file exists and user is NOT listed).
* root is always allowed.
*/
int allowed(const char *username, const char *allow_file,
const char *deny_file) {
FILE *fp;
int isallowed;
char buf[128];
if (getuid() == 0)
return TRUE;
isallowed = FALSE;
if ((fp = fopen(allow_file, "r")) != NULL) {
isallowed = in_file(username, fp, FALSE);
fclose(fp);
if ((getuid() == 0) && (!isallowed)) {
snprintf(buf, sizeof (buf),
"root used -u for user %s not in cron.allow", username);
log_it("crontab", getpid(), "warning", buf, 0);
isallowed = TRUE;
}
}
else if ((fp = fopen(deny_file, "r")) != NULL) {
isallowed = !in_file(username, fp, FALSE);
fclose(fp);
if ((getuid() == 0) && (!isallowed)) {
snprintf(buf, sizeof (buf),
"root used -u for user %s in cron.deny", username);
log_it("crontab", getpid(), "warning", buf, 0);
isallowed = TRUE;
}
}
#ifdef WITH_AUDIT
if (isallowed == FALSE) {
int audit_fd = audit_open();
audit_log_user_message(audit_fd, AUDIT_USER_START, "cron deny",
NULL, NULL, NULL, 0);
close(audit_fd);
}
#endif
return (isallowed);
}

10
src/user.c
View File

@ -124,6 +124,16 @@ load_user (int crontab_fd, struct passwd *pw, const char *uname,
}
status = load_env (envstr, file);
switch (status) {
case ERR:
/* If envstr has content, we reached EOF
* without a newline, and the line will be
* ignored.
*/
if (envstr[0] != '\0') {
FileName = tabname;
log_error("missing newline before EOF");
}
break;
case FALSE:
++entries;
if (!u->system && entries > MAX_USER_ENTRIES) {