Bernhard Reutner-Fischer | 2c99851 | 2006-04-12 18:09:26 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 2 | /* |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 3 | * run as root, but NOT setuid root |
| 4 | * |
| 5 | * Copyright 1994 Matthew Dillon (dillon@apollo.west.oic.com) |
Denis Vlasenko | b9c02dd | 2007-08-18 15:48:00 +0000 | [diff] [blame] | 6 | * (version 2.3.2) |
Mike Frysinger | f284c76 | 2006-04-16 20:38:26 +0000 | [diff] [blame] | 7 | * Vladimir Oleynik <dzo@simtreas.ru> (C) 2002 |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 8 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 10 | */ |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 11 | //config:config CROND |
Denys Vlasenko | 4eed2c6 | 2017-07-18 22:01:24 +0200 | [diff] [blame] | 12 | //config: bool "crond (13 kb)" |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 13 | //config: default y |
| 14 | //config: select FEATURE_SYSLOG |
| 15 | //config: help |
Denys Vlasenko | 72089cf | 2017-07-21 09:50:55 +0200 | [diff] [blame] | 16 | //config: Crond is a background daemon that parses individual crontab |
| 17 | //config: files and executes commands on behalf of the users in question. |
| 18 | //config: This is a port of dcron from slackware. It uses files of the |
| 19 | //config: format /var/spool/cron/crontabs/<username> files, for example: |
| 20 | //config: $ cat /var/spool/cron/crontabs/root |
| 21 | //config: # Run daily cron jobs at 4:40 every day: |
| 22 | //config: 40 4 * * * /etc/cron/daily > /dev/null 2>&1 |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 23 | //config: |
| 24 | //config:config FEATURE_CROND_D |
Denys Vlasenko | 5b3cbe3 | 2017-07-27 14:45:25 +0200 | [diff] [blame] | 25 | //config: bool "Support -d (redirect output to stderr)" |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 26 | //config: depends on CROND |
| 27 | //config: default y |
| 28 | //config: help |
Denys Vlasenko | 72089cf | 2017-07-21 09:50:55 +0200 | [diff] [blame] | 29 | //config: -d N sets loglevel (0:most verbose) and directs all output to stderr. |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 30 | //config: |
| 31 | //config:config FEATURE_CROND_CALL_SENDMAIL |
| 32 | //config: bool "Report command output via email (using sendmail)" |
| 33 | //config: default y |
| 34 | //config: depends on CROND |
| 35 | //config: help |
Denys Vlasenko | 72089cf | 2017-07-21 09:50:55 +0200 | [diff] [blame] | 36 | //config: Command output will be sent to corresponding user via email. |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 37 | //config: |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 38 | //config:config FEATURE_CROND_SPECIAL_TIMES |
| 39 | //config: bool "Support special times (@reboot, @daily, etc) in crontabs" |
| 40 | //config: default y |
| 41 | //config: depends on CROND |
| 42 | //config: help |
Denys Vlasenko | 72089cf | 2017-07-21 09:50:55 +0200 | [diff] [blame] | 43 | //config: string meaning |
| 44 | //config: ------ ------- |
| 45 | //config: @reboot Run once, at startup |
| 46 | //config: @yearly Run once a year: "0 0 1 1 *" |
| 47 | //config: @annually Same as @yearly: "0 0 1 1 *" |
| 48 | //config: @monthly Run once a month: "0 0 1 * *" |
| 49 | //config: @weekly Run once a week: "0 0 * * 0" |
| 50 | //config: @daily Run once a day: "0 0 * * *" |
| 51 | //config: @midnight Same as @daily: "0 0 * * *" |
| 52 | //config: @hourly Run once an hour: "0 * * * *" |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 53 | //config: |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 54 | //config:config FEATURE_CROND_DIR |
| 55 | //config: string "crond spool directory" |
| 56 | //config: default "/var/spool/cron" |
| 57 | //config: depends on CROND || CRONTAB |
| 58 | //config: help |
Denys Vlasenko | 72089cf | 2017-07-21 09:50:55 +0200 | [diff] [blame] | 59 | //config: Location of crond spool. |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 60 | |
| 61 | //applet:IF_CROND(APPLET(crond, BB_DIR_USR_SBIN, BB_SUID_DROP)) |
| 62 | |
| 63 | //kbuild:lib-$(CONFIG_CROND) += crond.o |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 64 | |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 65 | //usage:#define crond_trivial_usage |
| 66 | //usage: "-fbS -l N " IF_FEATURE_CROND_D("-d N ") "-L LOGFILE -c DIR" |
| 67 | //usage:#define crond_full_usage "\n\n" |
| 68 | //usage: " -f Foreground" |
| 69 | //usage: "\n -b Background (default)" |
| 70 | //usage: "\n -S Log to syslog (default)" |
Denys Vlasenko | f3d705f | 2017-01-21 03:46:35 +0100 | [diff] [blame] | 71 | //usage: "\n -l N Set log level. Most verbose 0, default 8" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 72 | //usage: IF_FEATURE_CROND_D( |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 73 | //usage: "\n -d N Set log level, log to stderr" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 74 | //usage: ) |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 75 | //usage: "\n -L FILE Log to FILE" |
| 76 | //usage: "\n -c DIR Cron dir. Default:"CONFIG_FEATURE_CROND_DIR"/crontabs" |
Pere Orga | 5bc8c00 | 2011-04-11 03:29:49 +0200 | [diff] [blame] | 77 | |
Denis Vlasenko | b9c02dd | 2007-08-18 15:48:00 +0000 | [diff] [blame] | 78 | #include "libbb.h" |
Denys Vlasenko | e6a2f4c | 2016-04-21 16:26:30 +0200 | [diff] [blame] | 79 | #include "common_bufsiz.h" |
Bernhard Reutner-Fischer | f470196 | 2008-01-27 12:50:12 +0000 | [diff] [blame] | 80 | #include <syslog.h> |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 81 | |
Denys Vlasenko | bbf17bb | 2017-07-22 02:25:47 +0200 | [diff] [blame] | 82 | #if 0 |
| 83 | /* If libc tracks and reuses setenv()-allocated memory, ok to set this to 0 */ |
| 84 | /* Neither glibc nor uclibc do that! */ |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 85 | # define SETENV_LEAKS 0 |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 86 | #else |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 87 | # define SETENV_LEAKS 1 |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 88 | #endif |
| 89 | |
| 90 | |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 91 | #define CRON_DIR CONFIG_FEATURE_CROND_DIR |
Denis Vlasenko | ded5dfe | 2009-02-03 23:59:41 +0000 | [diff] [blame] | 92 | #define CRONTABS CONFIG_FEATURE_CROND_DIR "/crontabs" |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 93 | #define CRON_REBOOT CONFIG_PID_FILE_PATH "/crond.reboot" |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 94 | #ifndef SENDMAIL |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 95 | # define SENDMAIL "sendmail" |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 96 | #endif |
| 97 | #ifndef SENDMAIL_ARGS |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 98 | # define SENDMAIL_ARGS "-ti" |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 99 | #endif |
| 100 | #ifndef CRONUPDATE |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 101 | # define CRONUPDATE "cron.update" |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 102 | #endif |
| 103 | #ifndef MAXLINES |
Denys Vlasenko | e4dcba1 | 2010-10-28 18:57:19 +0200 | [diff] [blame] | 104 | # define MAXLINES 256 /* max lines in non-root crontabs */ |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 105 | #endif |
| 106 | |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 107 | |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 108 | typedef struct CronFile { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 109 | struct CronFile *cf_next; |
| 110 | struct CronLine *cf_lines; |
| 111 | char *cf_username; |
| 112 | smallint cf_wants_starting; /* bool: one or more jobs ready */ |
| 113 | smallint cf_has_running; /* bool: one or more jobs running */ |
| 114 | smallint cf_deleted; /* marked for deletion (but still has running jobs) */ |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 115 | } CronFile; |
| 116 | |
| 117 | typedef struct CronLine { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 118 | struct CronLine *cl_next; |
| 119 | char *cl_cmd; /* shell command */ |
| 120 | pid_t cl_pid; /* >0:running, <0:needs to be started in this minute, 0:dormant */ |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 121 | #define START_ME_REBOOT -2 |
| 122 | #define START_ME_NORMAL -1 |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 123 | #if ENABLE_FEATURE_CROND_CALL_SENDMAIL |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 124 | int cl_empty_mail_size; /* size of mail header only, 0 if no mailfile */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 125 | char *cl_mailto; /* whom to mail results, may be NULL */ |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 126 | #endif |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 127 | char *cl_shell; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 128 | /* ordered by size, not in natural order. makes code smaller: */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 129 | char cl_Dow[7]; /* 0-6, beginning sunday */ |
| 130 | char cl_Mons[12]; /* 0-11 */ |
| 131 | char cl_Hrs[24]; /* 0-23 */ |
| 132 | char cl_Days[32]; /* 1-31 */ |
| 133 | char cl_Mins[60]; /* 0-59 */ |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 134 | } CronLine; |
| 135 | |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 136 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 137 | #define DAEMON_UID 0 |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 138 | |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 139 | |
| 140 | enum { |
| 141 | OPT_l = (1 << 0), |
| 142 | OPT_L = (1 << 1), |
| 143 | OPT_f = (1 << 2), |
| 144 | OPT_b = (1 << 3), |
| 145 | OPT_S = (1 << 4), |
| 146 | OPT_c = (1 << 5), |
Denis Vlasenko | 35a064b | 2008-11-06 00:49:59 +0000 | [diff] [blame] | 147 | OPT_d = (1 << 6) * ENABLE_FEATURE_CROND_D, |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 148 | }; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 149 | |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 150 | struct globals { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 151 | unsigned log_level; /* = 8; */ |
| 152 | time_t crontab_dir_mtime; |
| 153 | const char *log_filename; |
| 154 | const char *crontab_dir_name; /* = CRONTABS; */ |
| 155 | CronFile *cron_files; |
Denys Vlasenko | c9e7843 | 2017-07-22 01:47:19 +0200 | [diff] [blame] | 156 | char *default_shell; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 157 | #if SETENV_LEAKS |
| 158 | char *env_var_user; |
| 159 | char *env_var_home; |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 160 | char *env_var_shell; |
| 161 | char *env_var_logname; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 162 | #endif |
Denys Vlasenko | 98a4c7c | 2010-02-04 15:00:15 +0100 | [diff] [blame] | 163 | } FIX_ALIASING; |
Denys Vlasenko | e6a2f4c | 2016-04-21 16:26:30 +0200 | [diff] [blame] | 164 | #define G (*(struct globals*)bb_common_bufsiz1) |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 165 | #define INIT_G() do { \ |
Denys Vlasenko | 47cfbf3 | 2016-04-21 18:18:48 +0200 | [diff] [blame] | 166 | setup_common_bufsiz(); \ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 167 | G.log_level = 8; \ |
| 168 | G.crontab_dir_name = CRONTABS; \ |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 169 | } while (0) |
| 170 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 171 | /* Log levels: |
| 172 | * 0 is the most verbose, default 8. |
| 173 | * For some reason, in fact only 5, 7 and 8 are used. |
| 174 | */ |
| 175 | static void crondlog(unsigned level, const char *msg, va_list va) |
| 176 | { |
| 177 | if (level >= G.log_level) { |
| 178 | /* |
| 179 | * We are called only for info meesages. |
| 180 | * Warnings/errors use plain bb_[p]error_msg's, which |
| 181 | * need not touch syslog_level |
| 182 | * (they are ok with LOG_ERR default). |
| 183 | */ |
| 184 | syslog_level = LOG_INFO; |
| 185 | bb_verror_msg(msg, va, /* strerr: */ NULL); |
| 186 | syslog_level = LOG_ERR; |
| 187 | } |
| 188 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 189 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 190 | static void log5(const char *msg, ...) |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 191 | { |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 192 | va_list va; |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 193 | va_start(va, msg); |
| 194 | crondlog(4, msg, va); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 195 | va_end(va); |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 196 | } |
| 197 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 198 | static void log7(const char *msg, ...) |
| 199 | { |
| 200 | va_list va; |
| 201 | va_start(va, msg); |
| 202 | crondlog(7, msg, va); |
| 203 | va_end(va); |
| 204 | } |
| 205 | |
| 206 | static void log8(const char *msg, ...) |
| 207 | { |
| 208 | va_list va; |
| 209 | va_start(va, msg); |
| 210 | crondlog(8, msg, va); |
| 211 | va_end(va); |
| 212 | } |
| 213 | |
| 214 | |
Denis Vlasenko | f9000c5 | 2007-08-19 18:49:21 +0000 | [diff] [blame] | 215 | static const char DowAry[] ALIGN1 = |
| 216 | "sun""mon""tue""wed""thu""fri""sat" |
Denis Vlasenko | f9000c5 | 2007-08-19 18:49:21 +0000 | [diff] [blame] | 217 | ; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 218 | |
Denis Vlasenko | f9000c5 | 2007-08-19 18:49:21 +0000 | [diff] [blame] | 219 | static const char MonAry[] ALIGN1 = |
| 220 | "jan""feb""mar""apr""may""jun""jul""aug""sep""oct""nov""dec" |
Denis Vlasenko | f9000c5 | 2007-08-19 18:49:21 +0000 | [diff] [blame] | 221 | ; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 222 | |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 223 | static void ParseField(char *user, char *ary, int modvalue, int off, |
Denis Vlasenko | f9000c5 | 2007-08-19 18:49:21 +0000 | [diff] [blame] | 224 | const char *names, char *ptr) |
| 225 | /* 'names' is a pointer to a set of 3-char abbreviations */ |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 226 | { |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 227 | char *base = ptr; |
| 228 | int n1 = -1; |
| 229 | int n2 = -1; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 230 | |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 231 | // this can't happen due to config_read() |
| 232 | /*if (base == NULL) |
| 233 | return;*/ |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 234 | |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 235 | while (1) { |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 236 | int skip = 0; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 237 | |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 238 | /* Handle numeric digit or symbol or '*' */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 239 | if (*ptr == '*') { |
Denys Vlasenko | e4dcba1 | 2010-10-28 18:57:19 +0200 | [diff] [blame] | 240 | n1 = 0; /* everything will be filled */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 241 | n2 = modvalue - 1; |
| 242 | skip = 1; |
| 243 | ++ptr; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 244 | } else if (isdigit(*ptr)) { |
Denys Vlasenko | 1f27ab0 | 2009-09-23 17:17:53 +0200 | [diff] [blame] | 245 | char *endp; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 246 | if (n1 < 0) { |
Denys Vlasenko | 1f27ab0 | 2009-09-23 17:17:53 +0200 | [diff] [blame] | 247 | n1 = strtol(ptr, &endp, 10) + off; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 248 | } else { |
Denys Vlasenko | 1f27ab0 | 2009-09-23 17:17:53 +0200 | [diff] [blame] | 249 | n2 = strtol(ptr, &endp, 10) + off; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 250 | } |
Denys Vlasenko | 1f27ab0 | 2009-09-23 17:17:53 +0200 | [diff] [blame] | 251 | ptr = endp; /* gcc likes temp var for &endp */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 252 | skip = 1; |
| 253 | } else if (names) { |
| 254 | int i; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 255 | |
Denis Vlasenko | f9000c5 | 2007-08-19 18:49:21 +0000 | [diff] [blame] | 256 | for (i = 0; names[i]; i += 3) { |
| 257 | /* was using strncmp before... */ |
| 258 | if (strncasecmp(ptr, &names[i], 3) == 0) { |
| 259 | ptr += 3; |
| 260 | if (n1 < 0) { |
| 261 | n1 = i / 3; |
| 262 | } else { |
| 263 | n2 = i / 3; |
| 264 | } |
| 265 | skip = 1; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 266 | break; |
| 267 | } |
| 268 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 269 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 270 | |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 271 | /* handle optional range '-' */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 272 | if (skip == 0) { |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 273 | goto err; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 274 | } |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 275 | if (*ptr == '-' && n2 < 0) { |
| 276 | ++ptr; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 277 | continue; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 278 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 279 | |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 280 | /* |
| 281 | * collapse single-value ranges, handle skipmark, and fill |
| 282 | * in the character array appropriately. |
| 283 | */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 284 | if (n2 < 0) { |
| 285 | n2 = n1; |
| 286 | } |
| 287 | if (*ptr == '/') { |
Denys Vlasenko | 1f27ab0 | 2009-09-23 17:17:53 +0200 | [diff] [blame] | 288 | char *endp; |
| 289 | skip = strtol(ptr + 1, &endp, 10); |
| 290 | ptr = endp; /* gcc likes temp var for &endp */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 291 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 292 | |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 293 | /* |
| 294 | * fill array, using a failsafe is the easiest way to prevent |
| 295 | * an endless loop |
| 296 | */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 297 | { |
| 298 | int s0 = 1; |
| 299 | int failsafe = 1024; |
| 300 | |
| 301 | --n1; |
| 302 | do { |
| 303 | n1 = (n1 + 1) % modvalue; |
| 304 | |
| 305 | if (--s0 == 0) { |
| 306 | ary[n1 % modvalue] = 1; |
| 307 | s0 = skip; |
| 308 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 309 | if (--failsafe == 0) { |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 310 | goto err; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 311 | } |
| 312 | } while (n1 != n2); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 313 | } |
| 314 | if (*ptr != ',') { |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 315 | break; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 316 | } |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 317 | ++ptr; |
| 318 | n1 = -1; |
| 319 | n2 = -1; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 320 | } |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 321 | |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 322 | if (*ptr) { |
| 323 | err: |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 324 | bb_error_msg("user %s: parse error at %s", user, base); |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 325 | return; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 326 | } |
| 327 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 328 | /* can't use log5 (it inserts newlines), open-coding it */ |
| 329 | if (G.log_level <= 5 && logmode != LOGMODE_SYSLOG) { |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 330 | int i; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 331 | for (i = 0; i < modvalue; ++i) |
| 332 | fprintf(stderr, "%d", (unsigned char)ary[i]); |
Denys Vlasenko | 19ced5c | 2010-06-06 21:53:09 +0200 | [diff] [blame] | 333 | bb_putchar_stderr('\n'); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 334 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 335 | } |
| 336 | |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 337 | static void FixDayDow(CronLine *line) |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 338 | { |
Denis Vlasenko | 6b06cb8 | 2008-05-15 21:30:45 +0000 | [diff] [blame] | 339 | unsigned i; |
"Vladimir N. Oleynik" | cd5c15d | 2006-01-30 13:36:03 +0000 | [diff] [blame] | 340 | int weekUsed = 0; |
| 341 | int daysUsed = 0; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 342 | |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 343 | for (i = 0; i < ARRAY_SIZE(line->cl_Dow); ++i) { |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 344 | if (line->cl_Dow[i] == 0) { |
| 345 | weekUsed = 1; |
| 346 | break; |
| 347 | } |
| 348 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 349 | for (i = 0; i < ARRAY_SIZE(line->cl_Days); ++i) { |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 350 | if (line->cl_Days[i] == 0) { |
| 351 | daysUsed = 1; |
| 352 | break; |
| 353 | } |
| 354 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 355 | if (weekUsed != daysUsed) { |
| 356 | if (weekUsed) |
| 357 | memset(line->cl_Days, 0, sizeof(line->cl_Days)); |
| 358 | else /* daysUsed */ |
| 359 | memset(line->cl_Dow, 0, sizeof(line->cl_Dow)); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 360 | } |
| 361 | } |
| 362 | |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 363 | /* |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 364 | * delete_cronfile() - delete user database |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 365 | * |
| 366 | * Note: multiple entries for same user may exist if we were unable to |
| 367 | * completely delete a database due to running processes. |
| 368 | */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 369 | //FIXME: we will start a new job even if the old job is running |
| 370 | //if crontab was reloaded: crond thinks that "new" job is different from "old" |
| 371 | //even if they are in fact completely the same. Example |
| 372 | //Crontab was: |
Denys Vlasenko | 69d69e2 | 2010-07-11 23:20:15 +0200 | [diff] [blame] | 373 | // 0-59 * * * * job1 |
| 374 | // 0-59 * * * * long_running_job2 |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 375 | //User edits crontab to: |
Denys Vlasenko | 69d69e2 | 2010-07-11 23:20:15 +0200 | [diff] [blame] | 376 | // 0-59 * * * * job1_updated |
| 377 | // 0-59 * * * * long_running_job2 |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 378 | //Bug: crond can now start another long_running_job2 even if old one |
| 379 | //is still running. |
Denys Vlasenko | 69d69e2 | 2010-07-11 23:20:15 +0200 | [diff] [blame] | 380 | //OTOH most other versions of cron do not wait for job termination anyway, |
| 381 | //they end up with multiple copies of jobs if they don't terminate soon enough. |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 382 | static void delete_cronfile(const char *userName) |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 383 | { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 384 | CronFile **pfile = &G.cron_files; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 385 | CronFile *file; |
| 386 | |
| 387 | while ((file = *pfile) != NULL) { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 388 | if (strcmp(userName, file->cf_username) == 0) { |
| 389 | CronLine **pline = &file->cf_lines; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 390 | CronLine *line; |
| 391 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 392 | file->cf_has_running = 0; |
| 393 | file->cf_deleted = 1; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 394 | |
| 395 | while ((line = *pline) != NULL) { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 396 | if (line->cl_pid > 0) { |
| 397 | file->cf_has_running = 1; |
| 398 | pline = &line->cl_next; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 399 | } else { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 400 | *pline = line->cl_next; |
| 401 | free(line->cl_cmd); |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 402 | free(line); |
| 403 | } |
| 404 | } |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 405 | if (file->cf_has_running == 0) { |
| 406 | *pfile = file->cf_next; |
| 407 | free(file->cf_username); |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 408 | free(file); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 409 | continue; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 410 | } |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 411 | } |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 412 | pfile = &file->cf_next; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 413 | } |
| 414 | } |
| 415 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 416 | static void load_crontab(const char *fileName) |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 417 | { |
Bernhard Reutner-Fischer | 6792128 | 2008-07-17 11:59:13 +0000 | [diff] [blame] | 418 | struct parser_t *parser; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 419 | struct stat sbuf; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 420 | int maxLines; |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 421 | char *tokens[6]; |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 422 | #if ENABLE_FEATURE_CROND_CALL_SENDMAIL |
| 423 | char *mailTo = NULL; |
| 424 | #endif |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 425 | char *shell = NULL; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 426 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 427 | delete_cronfile(fileName); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 428 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 429 | if (!getpwnam(fileName)) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 430 | log7("ignoring file '%s' (no such user)", fileName); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 431 | return; |
| 432 | } |
| 433 | |
Bernhard Reutner-Fischer | 6792128 | 2008-07-17 11:59:13 +0000 | [diff] [blame] | 434 | parser = config_open(fileName); |
| 435 | if (!parser) |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 436 | return; |
| 437 | |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 438 | maxLines = (strcmp(fileName, "root") == 0) ? 65535 : MAXLINES; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 439 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 440 | if (fstat(fileno(parser->fp), &sbuf) == 0 && sbuf.st_uid == DAEMON_UID) { |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 441 | CronFile *file = xzalloc(sizeof(CronFile)); |
| 442 | CronLine **pline; |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 443 | int n; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 444 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 445 | file->cf_username = xstrdup(fileName); |
| 446 | pline = &file->cf_lines; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 447 | |
Denis Vlasenko | 084266e | 2008-07-26 23:08:31 +0000 | [diff] [blame] | 448 | while (1) { |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 449 | CronLine *line; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 450 | |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 451 | if (!--maxLines) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 452 | bb_error_msg("user %s: too many lines", fileName); |
Denis Vlasenko | 084266e | 2008-07-26 23:08:31 +0000 | [diff] [blame] | 453 | break; |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 454 | } |
| 455 | |
Denis Vlasenko | 084266e | 2008-07-26 23:08:31 +0000 | [diff] [blame] | 456 | n = config_read(parser, tokens, 6, 1, "# \t", PARSE_NORMAL | PARSE_KEEP_COPY); |
| 457 | if (!n) |
| 458 | break; |
| 459 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 460 | log5("user:%s entry:%s", fileName, parser->data); |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 461 | |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 462 | /* check if line is setting MAILTO= */ |
Denys Vlasenko | 8dff01d | 2015-03-12 17:48:34 +0100 | [diff] [blame] | 463 | if (is_prefixed_with(tokens[0], "MAILTO=")) { |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 464 | #if ENABLE_FEATURE_CROND_CALL_SENDMAIL |
| 465 | free(mailTo); |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 466 | mailTo = (tokens[0][7]) ? xstrdup(&tokens[0][7]) : NULL; |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 467 | #endif /* otherwise just ignore such lines */ |
| 468 | continue; |
| 469 | } |
Denys Vlasenko | 8dff01d | 2015-03-12 17:48:34 +0100 | [diff] [blame] | 470 | if (is_prefixed_with(tokens[0], "SHELL=")) { |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 471 | free(shell); |
| 472 | shell = xstrdup(&tokens[0][6]); |
| 473 | continue; |
| 474 | } |
Denys Vlasenko | 0b3b65f | 2017-07-09 00:00:39 +0200 | [diff] [blame] | 475 | //TODO: handle HOME= too? "man crontab" says: |
| 476 | //name = value |
| 477 | // |
| 478 | //where the spaces around the equal-sign (=) are optional, and any subsequent |
| 479 | //non-leading spaces in value will be part of the value assigned to name. |
| 480 | //The value string may be placed in quotes (single or double, but matching) |
| 481 | //to preserve leading or trailing blanks. |
| 482 | // |
| 483 | //Several environment variables are set up automatically by the cron(8) daemon. |
| 484 | //SHELL is set to /bin/sh, and LOGNAME and HOME are set from the /etc/passwd |
| 485 | //line of the crontab's owner. HOME and SHELL may be overridden by settings |
| 486 | //in the crontab; LOGNAME may not. |
| 487 | |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 488 | #if ENABLE_FEATURE_CROND_SPECIAL_TIMES |
| 489 | if (tokens[0][0] == '@') { |
| 490 | /* |
| 491 | * "@daily /a/script/to/run PARAM1 PARAM2..." |
| 492 | */ |
| 493 | typedef struct SpecialEntry { |
| 494 | const char *name; |
| 495 | const char tokens[8]; |
| 496 | } SpecialEntry; |
| 497 | static const SpecialEntry SpecAry[] = { |
| 498 | /* hour day month weekday */ |
| 499 | { "yearly", "0\0" "1\0" "1\0" "*" }, |
| 500 | { "annually", "0\0" "1\0" "1\0" "*" }, |
| 501 | { "monthly", "0\0" "1\0" "*\0" "*" }, |
| 502 | { "weekly", "0\0" "*\0" "*\0" "0" }, |
| 503 | { "daily", "0\0" "*\0" "*\0" "*" }, |
| 504 | { "midnight", "0\0" "*\0" "*\0" "*" }, |
| 505 | { "hourly", "*\0" "*\0" "*\0" "*" }, |
| 506 | { "reboot", "" }, |
| 507 | }; |
| 508 | const SpecialEntry *e = SpecAry; |
| 509 | |
| 510 | if (n < 2) |
| 511 | continue; |
| 512 | for (;;) { |
| 513 | if (strcmp(e->name, tokens[0] + 1) == 0) { |
| 514 | /* |
| 515 | * tokens[1] is only the first word of command, |
Denys Vlasenko | d18b200 | 2017-07-09 00:08:13 +0200 | [diff] [blame] | 516 | * can'r use it. |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 517 | * find the entire command in unmodified string: |
| 518 | */ |
Denys Vlasenko | d18b200 | 2017-07-09 00:08:13 +0200 | [diff] [blame] | 519 | tokens[5] = skip_whitespace( |
| 520 | skip_non_whitespace( |
| 521 | skip_whitespace(parser->data))); |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 522 | if (e->tokens[0]) { |
| 523 | char *et = (char*)e->tokens; |
| 524 | /* minute is "0" for all specials */ |
| 525 | tokens[0] = (char*)"0"; |
| 526 | tokens[1] = et; |
| 527 | tokens[2] = et + 2; |
| 528 | tokens[3] = et + 4; |
| 529 | tokens[4] = et + 6; |
| 530 | } |
| 531 | goto got_it; |
| 532 | } |
| 533 | if (!e->tokens[0]) |
| 534 | break; |
| 535 | e++; |
| 536 | } |
| 537 | continue; /* bad line (unrecognized '@foo') */ |
| 538 | } |
| 539 | #endif |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 540 | /* check if a minimum of tokens is specified */ |
Denis Vlasenko | 2e157dd | 2008-07-19 09:27:19 +0000 | [diff] [blame] | 541 | if (n < 6) |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 542 | continue; |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 543 | IF_FEATURE_CROND_SPECIAL_TIMES( |
| 544 | got_it: |
| 545 | ) |
Denis Vlasenko | 084266e | 2008-07-26 23:08:31 +0000 | [diff] [blame] | 546 | *pline = line = xzalloc(sizeof(*line)); |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 547 | #if ENABLE_FEATURE_CROND_SPECIAL_TIMES |
| 548 | if (tokens[0][0] == '@') { /* "@reboot" line */ |
| 549 | file->cf_wants_starting = 1; |
| 550 | line->cl_pid = START_ME_REBOOT; /* wants to start */ |
| 551 | /* line->cl_Mins/Hrs/etc stay zero: never match any time */ |
| 552 | } else |
| 553 | #endif |
| 554 | { |
| 555 | /* parse date ranges */ |
| 556 | ParseField(file->cf_username, line->cl_Mins, 60, 0, NULL, tokens[0]); |
| 557 | ParseField(file->cf_username, line->cl_Hrs, 24, 0, NULL, tokens[1]); |
| 558 | ParseField(file->cf_username, line->cl_Days, 32, 0, NULL, tokens[2]); |
| 559 | ParseField(file->cf_username, line->cl_Mons, 12, -1, MonAry, tokens[3]); |
| 560 | ParseField(file->cf_username, line->cl_Dow, 7, 0, DowAry, tokens[4]); |
| 561 | /* |
| 562 | * fix days and dow - if one is not "*" and the other |
| 563 | * is "*", the other is set to 0, and vise-versa |
| 564 | */ |
| 565 | FixDayDow(line); |
| 566 | } |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 567 | #if ENABLE_FEATURE_CROND_CALL_SENDMAIL |
| 568 | /* copy mailto (can be NULL) */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 569 | line->cl_mailto = xstrdup(mailTo); |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 570 | #endif |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 571 | line->cl_shell = xstrdup(shell); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 572 | /* copy command */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 573 | line->cl_cmd = xstrdup(tokens[5]); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 574 | pline = &line->cl_next; |
Denis Vlasenko | c01340f | 2008-07-16 22:12:18 +0000 | [diff] [blame] | 575 | //bb_error_msg("M[%s]F[%s][%s][%s][%s][%s][%s]", mailTo, tokens[0], tokens[1], tokens[2], tokens[3], tokens[4], tokens[5]); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 576 | } |
| 577 | *pline = NULL; |
| 578 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 579 | file->cf_next = G.cron_files; |
| 580 | G.cron_files = file; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 581 | } |
Bernhard Reutner-Fischer | 6792128 | 2008-07-17 11:59:13 +0000 | [diff] [blame] | 582 | config_close(parser); |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 583 | #if ENABLE_FEATURE_CROND_CALL_SENDMAIL |
| 584 | free(mailTo); |
| 585 | #endif |
| 586 | free(shell); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 587 | } |
| 588 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 589 | static void process_cron_update_file(void) |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 590 | { |
| 591 | FILE *fi; |
| 592 | char buf[256]; |
| 593 | |
Denis Vlasenko | 5415c85 | 2008-07-21 23:05:26 +0000 | [diff] [blame] | 594 | fi = fopen_for_read(CRONUPDATE); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 595 | if (fi != NULL) { |
Denis Vlasenko | cb448fe | 2008-02-17 14:28:53 +0000 | [diff] [blame] | 596 | unlink(CRONUPDATE); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 597 | while (fgets(buf, sizeof(buf), fi) != NULL) { |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 598 | /* use first word only */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 599 | skip_non_whitespace(buf)[0] = '\0'; |
| 600 | load_crontab(buf); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 601 | } |
| 602 | fclose(fi); |
| 603 | } |
| 604 | } |
| 605 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 606 | static void rescan_crontab_dir(void) |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 607 | { |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 608 | CronFile *file; |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 609 | |
| 610 | /* Delete all files until we only have ones with running jobs (or none) */ |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 611 | again: |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 612 | for (file = G.cron_files; file; file = file->cf_next) { |
| 613 | if (!file->cf_deleted) { |
| 614 | delete_cronfile(file->cf_username); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 615 | goto again; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 616 | } |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 617 | } |
| 618 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 619 | /* Remove cron update file */ |
Denis Vlasenko | cb448fe | 2008-02-17 14:28:53 +0000 | [diff] [blame] | 620 | unlink(CRONUPDATE); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 621 | /* Re-chdir, in case directory was renamed & deleted */ |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 622 | xchdir(G.crontab_dir_name); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 623 | |
| 624 | /* Scan directory and add associated users */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 625 | { |
| 626 | DIR *dir = opendir("."); |
| 627 | struct dirent *den; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 628 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 629 | /* xopendir exists, but "can't open '.'" is not informative */ |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 630 | if (!dir) |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 631 | bb_error_msg_and_die("can't open '%s'", G.crontab_dir_name); |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 632 | while ((den = readdir(dir)) != NULL) { |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 633 | if (strchr(den->d_name, '.') != NULL) { |
| 634 | continue; |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 635 | } |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 636 | load_crontab(den->d_name); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 637 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 638 | closedir(dir); |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 639 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 640 | } |
| 641 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 642 | #if SETENV_LEAKS |
| 643 | /* We set environment *before* vfork (because we want to use vfork), |
| 644 | * so we cannot use setenv() - repeated calls to setenv() may leak memory! |
| 645 | * Using putenv(), and freeing memory after unsetenv() won't leak */ |
| 646 | static void safe_setenv(char **pvar_val, const char *var, const char *val) |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 647 | { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 648 | char *var_val = *pvar_val; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 649 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 650 | if (var_val) { |
| 651 | bb_unsetenv_and_free(var_val); |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 652 | } |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 653 | *pvar_val = xasprintf("%s=%s", var, val); |
| 654 | putenv(*pvar_val); |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 655 | } |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 656 | #endif |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 657 | |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 658 | static void set_env_vars(struct passwd *pas, const char *shell) |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 659 | { |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 660 | /* POSIX requires crond to set up at least HOME, LOGNAME, PATH, SHELL. |
| 661 | * We assume crond inherited suitable PATH. |
| 662 | */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 663 | #if SETENV_LEAKS |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 664 | safe_setenv(&G.env_var_logname, "LOGNAME", pas->pw_name); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 665 | safe_setenv(&G.env_var_user, "USER", pas->pw_name); |
| 666 | safe_setenv(&G.env_var_home, "HOME", pas->pw_dir); |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 667 | safe_setenv(&G.env_var_shell, "SHELL", shell); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 668 | #else |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 669 | xsetenv("LOGNAME", pas->pw_name); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 670 | xsetenv("USER", pas->pw_name); |
| 671 | xsetenv("HOME", pas->pw_dir); |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 672 | xsetenv("SHELL", shell); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 673 | #endif |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 674 | } |
| 675 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 676 | static void change_user(struct passwd *pas) |
| 677 | { |
| 678 | /* careful: we're after vfork! */ |
| 679 | change_identity(pas); /* - initgroups, setgid, setuid */ |
| 680 | if (chdir(pas->pw_dir) < 0) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 681 | bb_error_msg("can't change directory to '%s'", pas->pw_dir); |
| 682 | xchdir(CRON_DIR); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 683 | } |
| 684 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 685 | |
| 686 | // TODO: sendmail should be _run-time_ option, not compile-time! |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 687 | #if ENABLE_FEATURE_CROND_CALL_SENDMAIL |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 688 | |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 689 | static pid_t |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 690 | fork_job(const char *user, int mailFd, CronLine *line, bool run_sendmail) |
| 691 | { |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 692 | struct passwd *pas; |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 693 | const char *shell, *prog; |
| 694 | smallint sv_logmode; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 695 | pid_t pid; |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 696 | |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 697 | /* prepare things before vfork */ |
| 698 | pas = getpwnam(user); |
| 699 | if (!pas) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 700 | bb_error_msg("can't get uid for %s", user); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 701 | goto err; |
| 702 | } |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 703 | |
Denys Vlasenko | c9e7843 | 2017-07-22 01:47:19 +0200 | [diff] [blame] | 704 | shell = line->cl_shell ? line->cl_shell : G.default_shell; |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 705 | prog = run_sendmail ? SENDMAIL : shell; |
| 706 | |
| 707 | set_env_vars(pas, shell); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 708 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 709 | sv_logmode = logmode; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 710 | pid = vfork(); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 711 | if (pid == 0) { |
| 712 | /* CHILD */ |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 713 | /* initgroups, setgid, setuid, and chdir to home or CRON_DIR */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 714 | change_user(pas); |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 715 | log5("child running %s", prog); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 716 | if (mailFd >= 0) { |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 717 | xmove_fd(mailFd, run_sendmail ? 0 : 1); |
Denis Vlasenko | 314820e | 2008-01-24 01:33:12 +0000 | [diff] [blame] | 718 | dup2(1, 2); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 719 | } |
Denis Vlasenko | 3f70b87 | 2008-12-04 13:57:59 +0000 | [diff] [blame] | 720 | /* crond 3.0pl1-100 puts tasks in separate process groups */ |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 721 | bb_setpgrp(); |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 722 | if (!run_sendmail) |
| 723 | execlp(prog, prog, "-c", line->cl_cmd, (char *) NULL); |
| 724 | else |
| 725 | execlp(prog, prog, SENDMAIL_ARGS, (char *) NULL); |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 726 | /* |
| 727 | * I want this error message on stderr too, |
| 728 | * even if other messages go only to syslog: |
| 729 | */ |
| 730 | logmode |= LOGMODE_STDIO; |
| 731 | bb_error_msg_and_die("can't execute '%s' for user %s", prog, user); |
Denis Vlasenko | 314820e | 2008-01-24 01:33:12 +0000 | [diff] [blame] | 732 | } |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 733 | logmode = sv_logmode; |
Denis Vlasenko | 314820e | 2008-01-24 01:33:12 +0000 | [diff] [blame] | 734 | |
| 735 | if (pid < 0) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 736 | bb_perror_msg("vfork"); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 737 | err: |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 738 | pid = 0; |
| 739 | } /* else: PARENT, FORK SUCCESS */ |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 740 | |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 741 | /* |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 742 | * Close the mail file descriptor.. we can't just leave it open in |
| 743 | * a structure, closing it later, because we might run out of descriptors |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 744 | */ |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 745 | if (mailFd >= 0) { |
| 746 | close(mailFd); |
| 747 | } |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 748 | return pid; |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 749 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 750 | |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 751 | static pid_t start_one_job(const char *user, CronLine *line) |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 752 | { |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 753 | char mailFile[128]; |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 754 | int mailFd = -1; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 755 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 756 | line->cl_pid = 0; |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 757 | line->cl_empty_mail_size = 0; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 758 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 759 | if (line->cl_mailto) { |
| 760 | /* Open mail file (owner is root so nobody can screw with it) */ |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 761 | snprintf(mailFile, sizeof(mailFile), "%s/cron.%s.%d", CRON_DIR, user, getpid()); |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 762 | mailFd = open(mailFile, O_CREAT | O_TRUNC | O_WRONLY | O_EXCL | O_APPEND, 0600); |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 763 | |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 764 | if (mailFd >= 0) { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 765 | fdprintf(mailFd, "To: %s\nSubject: cron: %s\n\n", line->cl_mailto, |
| 766 | line->cl_cmd); |
| 767 | line->cl_empty_mail_size = lseek(mailFd, 0, SEEK_CUR); |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 768 | } else { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 769 | bb_error_msg("can't create mail file %s for user %s, " |
Denis Vlasenko | 6fa1ba3 | 2008-04-07 21:02:35 +0000 | [diff] [blame] | 770 | "discarding output", mailFile, user); |
| 771 | } |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 772 | } |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 773 | |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 774 | line->cl_pid = fork_job(user, mailFd, line, /*sendmail?*/ 0); |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 775 | if (mailFd >= 0) { |
| 776 | if (line->cl_pid <= 0) { |
| 777 | unlink(mailFile); |
| 778 | } else { |
| 779 | /* rename mail-file based on pid of process */ |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 780 | char *mailFile2 = xasprintf("%s/cron.%s.%d", CRON_DIR, user, (int)line->cl_pid); |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 781 | rename(mailFile, mailFile2); // TODO: xrename? |
| 782 | free(mailFile2); |
| 783 | } |
| 784 | } |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 785 | |
| 786 | return line->cl_pid; |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | /* |
| 790 | * process_finished_job - called when job terminates and when mail terminates |
| 791 | */ |
| 792 | static void process_finished_job(const char *user, CronLine *line) |
| 793 | { |
| 794 | pid_t pid; |
| 795 | int mailFd; |
| 796 | char mailFile[128]; |
| 797 | struct stat sbuf; |
| 798 | |
| 799 | pid = line->cl_pid; |
| 800 | line->cl_pid = 0; |
| 801 | if (pid <= 0) { |
| 802 | /* No job */ |
| 803 | return; |
| 804 | } |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 805 | if (line->cl_empty_mail_size <= 0) { |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 806 | /* End of job and no mail file, or end of sendmail job */ |
| 807 | return; |
| 808 | } |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 809 | |
| 810 | /* |
| 811 | * End of primary job - check for mail file. |
| 812 | * If size has changed and the file is still valid, we send it. |
| 813 | */ |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 814 | snprintf(mailFile, sizeof(mailFile), "%s/cron.%s.%d", CRON_DIR, user, (int)pid); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 815 | mailFd = open(mailFile, O_RDONLY); |
| 816 | unlink(mailFile); |
| 817 | if (mailFd < 0) { |
| 818 | return; |
| 819 | } |
| 820 | |
| 821 | if (fstat(mailFd, &sbuf) < 0 |
| 822 | || sbuf.st_uid != DAEMON_UID |
| 823 | || sbuf.st_nlink != 0 |
| 824 | || sbuf.st_size == line->cl_empty_mail_size |
| 825 | || !S_ISREG(sbuf.st_mode) |
| 826 | ) { |
| 827 | close(mailFd); |
| 828 | return; |
| 829 | } |
Denys Vlasenko | 1f0ab1d | 2010-07-08 16:12:10 +0200 | [diff] [blame] | 830 | line->cl_empty_mail_size = 0; |
| 831 | /* if (line->cl_mailto) - always true if cl_empty_mail_size was nonzero */ |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 832 | line->cl_pid = fork_job(user, mailFd, line, /*sendmail?*/ 1); |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 833 | } |
| 834 | |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 835 | #else /* !ENABLE_FEATURE_CROND_CALL_SENDMAIL */ |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 836 | |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 837 | static pid_t start_one_job(const char *user, CronLine *line) |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 838 | { |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 839 | const char *shell; |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 840 | struct passwd *pas; |
| 841 | pid_t pid; |
Eric Andersen | 35e643b | 2003-07-28 07:40:39 +0000 | [diff] [blame] | 842 | |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 843 | pas = getpwnam(user); |
| 844 | if (!pas) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 845 | bb_error_msg("can't get uid for %s", user); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 846 | goto err; |
| 847 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 848 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 849 | /* Prepare things before vfork */ |
Denys Vlasenko | c9e7843 | 2017-07-22 01:47:19 +0200 | [diff] [blame] | 850 | shell = line->cl_shell ? line->cl_shell : G.default_shell; |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 851 | set_env_vars(pas, shell); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 852 | |
| 853 | /* Fork as the user in question and run program */ |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 854 | pid = vfork(); |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 855 | if (pid == 0) { |
| 856 | /* CHILD */ |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 857 | /* initgroups, setgid, setuid, and chdir to home or CRON_DIR */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 858 | change_user(pas); |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 859 | log5("child running %s", shell); |
Denis Vlasenko | 3f70b87 | 2008-12-04 13:57:59 +0000 | [diff] [blame] | 860 | /* crond 3.0pl1-100 puts tasks in separate process groups */ |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 861 | bb_setpgrp(); |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 862 | execl(shell, shell, "-c", line->cl_cmd, (char *) NULL); |
| 863 | bb_error_msg_and_die("can't execute '%s' for user %s", shell, user); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 864 | } |
| 865 | if (pid < 0) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 866 | bb_perror_msg("vfork"); |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 867 | err: |
Glenn L McGrath | 9079ad0 | 2004-02-22 04:44:21 +0000 | [diff] [blame] | 868 | pid = 0; |
| 869 | } |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 870 | line->cl_pid = pid; |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 871 | return pid; |
Eric Andersen | f6f7bfb | 2002-10-22 12:24:59 +0000 | [diff] [blame] | 872 | } |
Denis Vlasenko | 4e6c812 | 2008-03-12 22:10:25 +0000 | [diff] [blame] | 873 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 874 | #define process_finished_job(user, line) ((line)->cl_pid = 0) |
| 875 | |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 876 | #endif /* !ENABLE_FEATURE_CROND_CALL_SENDMAIL */ |
| 877 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 878 | /* |
| 879 | * Determine which jobs need to be run. Under normal conditions, the |
| 880 | * period is about a minute (one scan). Worst case it will be one |
| 881 | * hour (60 scans). |
| 882 | */ |
| 883 | static void flag_starting_jobs(time_t t1, time_t t2) |
| 884 | { |
| 885 | time_t t; |
| 886 | |
| 887 | /* Find jobs > t1 and <= t2 */ |
| 888 | |
| 889 | for (t = t1 - t1 % 60; t <= t2; t += 60) { |
| 890 | struct tm *ptm; |
| 891 | CronFile *file; |
| 892 | CronLine *line; |
| 893 | |
| 894 | if (t <= t1) |
| 895 | continue; |
| 896 | |
| 897 | ptm = localtime(&t); |
| 898 | for (file = G.cron_files; file; file = file->cf_next) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 899 | log5("file %s:", file->cf_username); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 900 | if (file->cf_deleted) |
| 901 | continue; |
| 902 | for (line = file->cf_lines; line; line = line->cl_next) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 903 | log5(" line %s", line->cl_cmd); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 904 | if (line->cl_Mins[ptm->tm_min] |
| 905 | && line->cl_Hrs[ptm->tm_hour] |
| 906 | && (line->cl_Days[ptm->tm_mday] || line->cl_Dow[ptm->tm_wday]) |
| 907 | && line->cl_Mons[ptm->tm_mon] |
| 908 | ) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 909 | log5(" job: %d %s", |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 910 | (int)line->cl_pid, line->cl_cmd); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 911 | if (line->cl_pid > 0) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 912 | log8("user %s: process already running: %s", |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 913 | file->cf_username, line->cl_cmd); |
| 914 | } else if (line->cl_pid == 0) { |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 915 | line->cl_pid = START_ME_NORMAL; |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 916 | file->cf_wants_starting = 1; |
| 917 | } |
| 918 | } |
| 919 | } |
| 920 | } |
| 921 | } |
| 922 | } |
| 923 | |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 924 | #if ENABLE_FEATURE_CROND_SPECIAL_TIMES |
| 925 | static int touch_reboot_file(void) |
| 926 | { |
| 927 | int fd = open(CRON_REBOOT, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC, 0000); |
| 928 | if (fd >= 0) { |
| 929 | close(fd); |
| 930 | return 1; |
| 931 | } |
| 932 | /* File (presumably) exists - this is not the first run after reboot */ |
| 933 | return 0; |
| 934 | } |
| 935 | #endif |
| 936 | |
| 937 | static void start_jobs(int wants_start) |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 938 | { |
| 939 | CronFile *file; |
| 940 | CronLine *line; |
| 941 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 942 | for (file = G.cron_files; file; file = file->cf_next) { |
| 943 | if (!file->cf_wants_starting) |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 944 | continue; |
| 945 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 946 | file->cf_wants_starting = 0; |
| 947 | for (line = file->cf_lines; line; line = line->cl_next) { |
| 948 | pid_t pid; |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 949 | if (line->cl_pid != wants_start) |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 950 | continue; |
| 951 | |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 952 | pid = start_one_job(file->cf_username, line); |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 953 | log8("USER %s pid %3d cmd %s", |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 954 | file->cf_username, (int)pid, line->cl_cmd); |
| 955 | if (pid < 0) { |
| 956 | file->cf_wants_starting = 1; |
| 957 | } |
| 958 | if (pid > 0) { |
| 959 | file->cf_has_running = 1; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 960 | } |
| 961 | } |
| 962 | } |
| 963 | } |
| 964 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 965 | /* |
| 966 | * Check for job completion, return number of jobs still running after |
| 967 | * all done. |
| 968 | */ |
| 969 | static int check_completions(void) |
| 970 | { |
| 971 | CronFile *file; |
| 972 | CronLine *line; |
| 973 | int num_still_running = 0; |
| 974 | |
| 975 | for (file = G.cron_files; file; file = file->cf_next) { |
| 976 | if (!file->cf_has_running) |
| 977 | continue; |
| 978 | |
| 979 | file->cf_has_running = 0; |
| 980 | for (line = file->cf_lines; line; line = line->cl_next) { |
| 981 | int r; |
| 982 | |
| 983 | if (line->cl_pid <= 0) |
| 984 | continue; |
| 985 | |
| 986 | r = waitpid(line->cl_pid, NULL, WNOHANG); |
| 987 | if (r < 0 || r == line->cl_pid) { |
| 988 | process_finished_job(file->cf_username, line); |
| 989 | if (line->cl_pid == 0) { |
| 990 | /* sendmail was not started for it */ |
| 991 | continue; |
| 992 | } |
| 993 | /* else: sendmail was started, job is still running, fall thru */ |
| 994 | } |
| 995 | /* else: r == 0: "process is still running" */ |
| 996 | file->cf_has_running = 1; |
| 997 | } |
| 998 | //FIXME: if !file->cf_has_running && file->deleted: delete it! |
| 999 | //otherwise deleted entries will stay forever, right? |
| 1000 | num_still_running += file->cf_has_running; |
| 1001 | } |
| 1002 | return num_still_running; |
| 1003 | } |
| 1004 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 1005 | static void reopen_logfile_to_stderr(void) |
| 1006 | { |
| 1007 | if (G.log_filename) { |
| 1008 | int logfd = open_or_warn(G.log_filename, O_WRONLY | O_CREAT | O_APPEND); |
| 1009 | if (logfd >= 0) |
| 1010 | xmove_fd(logfd, STDERR_FILENO); |
| 1011 | } |
| 1012 | } |
| 1013 | |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1014 | int crond_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 1015 | int crond_main(int argc UNUSED_PARAM, char **argv) |
| 1016 | { |
| 1017 | time_t t2; |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 1018 | unsigned rescan; |
| 1019 | unsigned sleep_time; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1020 | unsigned opts; |
| 1021 | |
| 1022 | INIT_G(); |
| 1023 | |
Denys Vlasenko | 22542ec | 2017-08-08 21:55:02 +0200 | [diff] [blame^] | 1024 | opts = getopt32(argv, "^" |
| 1025 | "l:L:fbSc:" IF_FEATURE_CROND_D("d:") |
| 1026 | "\0" |
| 1027 | /* "-b after -f is ignored", and so on for every pair a-b */ |
| 1028 | "f-b:b-f:S-L:L-S" IF_FEATURE_CROND_D(":d-l") |
Denys Vlasenko | 8c84f75 | 2011-09-07 05:56:09 +0200 | [diff] [blame] | 1029 | /* -l and -d have numeric param */ |
Denys Vlasenko | 22542ec | 2017-08-08 21:55:02 +0200 | [diff] [blame^] | 1030 | ":l+" IF_FEATURE_CROND_D(":d+") |
| 1031 | , |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1032 | &G.log_level, &G.log_filename, &G.crontab_dir_name |
Denys Vlasenko | 22542ec | 2017-08-08 21:55:02 +0200 | [diff] [blame^] | 1033 | IF_FEATURE_CROND_D(,&G.log_level) |
| 1034 | ); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1035 | /* both -d N and -l N set the same variable: G.log_level */ |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1036 | |
| 1037 | if (!(opts & OPT_f)) { |
| 1038 | /* close stdin, stdout, stderr. |
| 1039 | * close unused descriptors - don't need them. */ |
| 1040 | bb_daemonize_or_rexec(DAEMON_CLOSE_EXTRA_FDS, argv); |
| 1041 | } |
| 1042 | |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1043 | if (!(opts & OPT_d) && G.log_filename == NULL) { |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1044 | /* logging to syslog */ |
| 1045 | openlog(applet_name, LOG_CONS | LOG_PID, LOG_CRON); |
| 1046 | logmode = LOGMODE_SYSLOG; |
| 1047 | } |
| 1048 | |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1049 | //signal(SIGHUP, SIG_IGN); /* ? original crond dies on HUP... */ |
Denys Vlasenko | 43b8a1c | 2014-04-30 17:38:27 +0200 | [diff] [blame] | 1050 | |
| 1051 | reopen_logfile_to_stderr(); |
| 1052 | xchdir(G.crontab_dir_name); |
Denys Vlasenko | c9e7843 | 2017-07-22 01:47:19 +0200 | [diff] [blame] | 1053 | /* $SHELL, or current UID's shell, or DEFAULT_SHELL */ |
| 1054 | /* Useful on Android where DEFAULT_SHELL /bin/sh may not exist */ |
| 1055 | G.default_shell = xstrdup(get_shell_name()); |
| 1056 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 1057 | log8("crond (busybox "BB_VER") started, log level %d", G.log_level); |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1058 | rescan_crontab_dir(); |
Anthony G. Basile | 12677ac | 2012-12-10 14:49:39 -0500 | [diff] [blame] | 1059 | write_pidfile(CONFIG_PID_FILE_PATH "/crond.pid"); |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 1060 | #if ENABLE_FEATURE_CROND_SPECIAL_TIMES |
| 1061 | if (touch_reboot_file()) |
| 1062 | start_jobs(START_ME_REBOOT); /* start @reboot entries, if any */ |
| 1063 | #endif |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1064 | |
Denys Vlasenko | dfc870f | 2010-07-08 04:07:54 +0200 | [diff] [blame] | 1065 | /* Main loop */ |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1066 | t2 = time(NULL); |
| 1067 | rescan = 60; |
| 1068 | sleep_time = 60; |
| 1069 | for (;;) { |
Denys Vlasenko | dfc870f | 2010-07-08 04:07:54 +0200 | [diff] [blame] | 1070 | struct stat sbuf; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1071 | time_t t1; |
| 1072 | long dt; |
| 1073 | |
Denys Vlasenko | dfc870f | 2010-07-08 04:07:54 +0200 | [diff] [blame] | 1074 | /* Synchronize to 1 minute, minimum 1 second */ |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 1075 | t1 = t2; |
| 1076 | sleep(sleep_time - (time(NULL) % sleep_time)); |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1077 | t2 = time(NULL); |
| 1078 | dt = (long)t2 - (long)t1; |
| 1079 | |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 1080 | reopen_logfile_to_stderr(); |
| 1081 | |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1082 | /* |
| 1083 | * The file 'cron.update' is checked to determine new cron |
| 1084 | * jobs. The directory is rescanned once an hour to deal |
| 1085 | * with any screwups. |
| 1086 | * |
| 1087 | * Check for time jump. Disparities over an hour either way |
| 1088 | * result in resynchronization. A negative disparity |
| 1089 | * less than an hour causes us to effectively sleep until we |
| 1090 | * match the original time (i.e. no re-execution of jobs that |
| 1091 | * have just been run). A positive disparity less than |
| 1092 | * an hour causes intermediate jobs to be run, but only once |
| 1093 | * in the worst case. |
| 1094 | * |
| 1095 | * When running jobs, the inequality used is greater but not |
| 1096 | * equal to t1, and less then or equal to t2. |
| 1097 | */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1098 | if (stat(G.crontab_dir_name, &sbuf) != 0) |
| 1099 | sbuf.st_mtime = 0; /* force update (once) if dir was deleted */ |
| 1100 | if (G.crontab_dir_mtime != sbuf.st_mtime) { |
| 1101 | G.crontab_dir_mtime = sbuf.st_mtime; |
Denys Vlasenko | dfc870f | 2010-07-08 04:07:54 +0200 | [diff] [blame] | 1102 | rescan = 1; |
| 1103 | } |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1104 | if (--rescan == 0) { |
| 1105 | rescan = 60; |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1106 | rescan_crontab_dir(); |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1107 | } |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1108 | process_cron_update_file(); |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 1109 | log5("wakeup dt=%ld", dt); |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1110 | if (dt < -60 * 60 || dt > 60 * 60) { |
Denys Vlasenko | d5929d6 | 2014-04-30 14:49:52 +0200 | [diff] [blame] | 1111 | bb_error_msg("time disparity of %ld minutes detected", dt / 60); |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1112 | /* and we do not run any jobs in this case */ |
| 1113 | } else if (dt > 0) { |
Denys Vlasenko | dfc870f | 2010-07-08 04:07:54 +0200 | [diff] [blame] | 1114 | /* Usual case: time advances forward, as expected */ |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1115 | flag_starting_jobs(t1, t2); |
Denys Vlasenko | 75fbea3 | 2017-07-08 20:53:11 +0200 | [diff] [blame] | 1116 | start_jobs(START_ME_NORMAL); |
Denys Vlasenko | 01a1a96 | 2014-04-30 14:47:28 +0200 | [diff] [blame] | 1117 | sleep_time = 60; |
Denys Vlasenko | 45963c8 | 2010-07-08 15:37:10 +0200 | [diff] [blame] | 1118 | if (check_completions() > 0) { |
| 1119 | /* some jobs are still running */ |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1120 | sleep_time = 10; |
Denys Vlasenko | 4a09aef | 2010-07-08 04:07:15 +0200 | [diff] [blame] | 1121 | } |
| 1122 | } |
| 1123 | /* else: time jumped back, do not run any jobs */ |
| 1124 | } /* for (;;) */ |
| 1125 | |
| 1126 | return 0; /* not reached */ |
| 1127 | } |