* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config CROND
-//config: bool "crond"
+//config: bool "crond (13 kb)"
//config: default y
//config: select FEATURE_SYSLOG
//config: help
-//config: Crond is a background daemon that parses individual crontab
-//config: files and executes commands on behalf of the users in question.
-//config: This is a port of dcron from slackware. It uses files of the
-//config: format /var/spool/cron/crontabs/<username> files, for example:
-//config: $ cat /var/spool/cron/crontabs/root
-//config: # Run daily cron jobs at 4:40 every day:
-//config: 40 4 * * * /etc/cron/daily > /dev/null 2>&1
+//config: Crond is a background daemon that parses individual crontab
+//config: files and executes commands on behalf of the users in question.
+//config: This is a port of dcron from slackware. It uses files of the
+//config: format /var/spool/cron/crontabs/<username> files, for example:
+//config: $ cat /var/spool/cron/crontabs/root
+//config: # Run daily cron jobs at 4:40 every day:
+//config: 40 4 * * * /etc/cron/daily > /dev/null 2>&1
//config:
//config:config FEATURE_CROND_D
-//config: bool "Support option -d to redirect output to stderr"
+//config: bool "Support -d (redirect output to stderr)"
//config: depends on CROND
//config: default y
//config: help
-//config: -d N sets loglevel (0:most verbose) and directs all output to stderr.
+//config: -d N sets loglevel (0:most verbose) and directs all output to stderr.
//config:
//config:config FEATURE_CROND_CALL_SENDMAIL
//config: bool "Report command output via email (using sendmail)"
//config: default y
//config: depends on CROND
//config: help
-//config: Command output will be sent to corresponding user via email.
+//config: Command output will be sent to corresponding user via email.
//config:
//config:config FEATURE_CROND_SPECIAL_TIMES
//config: bool "Support special times (@reboot, @daily, etc) in crontabs"
//config: default y
//config: depends on CROND
//config: help
-//config: string meaning
-//config: ------ -------
-//config: @reboot Run once, at startup
-//config: @yearly Run once a year: "0 0 1 1 *"
-//config: @annually Same as @yearly: "0 0 1 1 *"
-//config: @monthly Run once a month: "0 0 1 * *"
-//config: @weekly Run once a week: "0 0 * * 0"
-//config: @daily Run once a day: "0 0 * * *"
-//config: @midnight Same as @daily: "0 0 * * *"
-//config: @hourly Run once an hour: "0 * * * *"
+//config: string meaning
+//config: ------ -------
+//config: @reboot Run once, at startup
+//config: @yearly Run once a year: "0 0 1 1 *"
+//config: @annually Same as @yearly: "0 0 1 1 *"
+//config: @monthly Run once a month: "0 0 1 * *"
+//config: @weekly Run once a week: "0 0 * * 0"
+//config: @daily Run once a day: "0 0 * * *"
+//config: @midnight Same as @daily: "0 0 * * *"
+//config: @hourly Run once an hour: "0 * * * *"
//config:
//config:config FEATURE_CROND_DIR
//config: string "crond spool directory"
//config: default "/var/spool/cron"
//config: depends on CROND || CRONTAB
//config: help
-//config: Location of crond spool.
+//config: Location of crond spool.
//applet:IF_CROND(APPLET(crond, BB_DIR_USR_SBIN, BB_SUID_DROP))
#include "common_bufsiz.h"
#include <syslog.h>
-/* glibc frees previous setenv'ed value when we do next setenv()
- * of the same variable. uclibc does not do this! */
-#if (defined(__GLIBC__) && !defined(__UCLIBC__)) /* || OTHER_SAFE_LIBC... */
+#if 0
+/* If libc tracks and reuses setenv()-allocated memory, ok to set this to 0 */
+/* Neither glibc nor uclibc do that! */
# define SETENV_LEAKS 0
#else
# define SETENV_LEAKS 1
const char *log_filename;
const char *crontab_dir_name; /* = CRONTABS; */
CronFile *cron_files;
+ char *default_shell;
#if SETENV_LEAKS
char *env_var_user;
char *env_var_home;
shell = xstrdup(&tokens[0][6]);
continue;
}
+//TODO: handle HOME= too? "man crontab" says:
+//name = value
+//
+//where the spaces around the equal-sign (=) are optional, and any subsequent
+//non-leading spaces in value will be part of the value assigned to name.
+//The value string may be placed in quotes (single or double, but matching)
+//to preserve leading or trailing blanks.
+//
+//Several environment variables are set up automatically by the cron(8) daemon.
+//SHELL is set to /bin/sh, and LOGNAME and HOME are set from the /etc/passwd
+//line of the crontab's owner. HOME and SHELL may be overridden by settings
+//in the crontab; LOGNAME may not.
+
#if ENABLE_FEATURE_CROND_SPECIAL_TIMES
if (tokens[0][0] == '@') {
/*
if (strcmp(e->name, tokens[0] + 1) == 0) {
/*
* tokens[1] is only the first word of command,
+ * can'r use it.
* find the entire command in unmodified string:
*/
- tokens[5] = strstr(
- skip_non_whitespace(skip_whitespace(parser->data)),
- /* ^^^^ avoids mishandling e.g. "@daily aily PARAM" */
- tokens[1]
- );
+ tokens[5] = skip_whitespace(
+ skip_non_whitespace(
+ skip_whitespace(parser->data)));
if (e->tokens[0]) {
char *et = (char*)e->tokens;
/* minute is "0" for all specials */
continue; /* bad line (unrecognized '@foo') */
}
#endif
-//TODO: handle HOME= too? "man crontab" says:
-//name = value
-//
-//where the spaces around the equal-sign (=) are optional, and any subsequent
-//non-leading spaces in value will be part of the value assigned to name.
-//The value string may be placed in quotes (single or double, but matching)
-//to preserve leading or trailing blanks.
-//
-//Several environment variables are set up automatically by the cron(8) daemon.
-//SHELL is set to /bin/sh, and LOGNAME and HOME are set from the /etc/passwd
-//line of the crontab's owner. HOME and SHELL may be overridden by settings
-//in the crontab; LOGNAME may not.
-
/* check if a minimum of tokens is specified */
if (n < 6)
continue;
goto err;
}
- shell = line->cl_shell ? line->cl_shell : DEFAULT_SHELL;
+ shell = line->cl_shell ? line->cl_shell : G.default_shell;
prog = run_sendmail ? SENDMAIL : shell;
set_env_vars(pas, shell);
}
/* Prepare things before vfork */
- shell = line->cl_shell ? line->cl_shell : DEFAULT_SHELL;
+ shell = line->cl_shell ? line->cl_shell : G.default_shell;
set_env_vars(pas, shell);
/* Fork as the user in question and run program */
INIT_G();
- /* "-b after -f is ignored", and so on for every pair a-b */
- opt_complementary = "f-b:b-f:S-L:L-S" IF_FEATURE_CROND_D(":d-l")
+ opts = getopt32(argv, "^"
+ "l:L:fbSc:" IF_FEATURE_CROND_D("d:")
+ "\0"
+ /* "-b after -f is ignored", and so on for every pair a-b */
+ "f-b:b-f:S-L:L-S" IF_FEATURE_CROND_D(":d-l")
/* -l and -d have numeric param */
- ":l+" IF_FEATURE_CROND_D(":d+");
- opts = getopt32(argv, "l:L:fbSc:" IF_FEATURE_CROND_D("d:"),
+ ":l+" IF_FEATURE_CROND_D(":d+")
+ ,
&G.log_level, &G.log_filename, &G.crontab_dir_name
- IF_FEATURE_CROND_D(,&G.log_level));
+ IF_FEATURE_CROND_D(,&G.log_level)
+ );
/* both -d N and -l N set the same variable: G.log_level */
if (!(opts & OPT_f)) {
reopen_logfile_to_stderr();
xchdir(G.crontab_dir_name);
+ /* $SHELL, or current UID's shell, or DEFAULT_SHELL */
+ /* Useful on Android where DEFAULT_SHELL /bin/sh may not exist */
+ G.default_shell = xstrdup(get_shell_name());
+
log8("crond (busybox "BB_VER") started, log level %d", G.log_level);
rescan_crontab_dir();
write_pidfile(CONFIG_PID_FILE_PATH "/crond.pid");
projects / oweals / busybox.git / blobdiff