271 lines
7.5 KiB
C
271 lines
7.5 KiB
C
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/* Copyright 1988,1990,1993 by Paul Vixie
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* All rights reserved
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*
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* Distribute freely, except: don't remove my name from the source or
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* documentation (don't take credit for my work), mark your changes (don't
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* get me blamed for your possible bugs), don't alter or remove this
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* notice. May be sold if buildable source is provided to buyer. No
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* warrantee of any kind, express or implied, is included with this
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* software; use at your own risk, responsibility for damages (if any) to
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* anyone resulting from the use of this software rests entirely with the
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* user.
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*
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* Send bug reports, bug fixes, enhancements, requests, flames, etc., and
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* I'll try to keep a version up to date. I can be reached as follows:
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* Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
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*/
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/* cron.h - header for vixie's cron
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*
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* $Id: cron.h,v 1.1.1.1 1994/01/05 20:40:13 jtc Exp $
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*
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* vix 14nov88 [rest of log is in RCS]
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* vix 14jan87 [0 or 7 can be sunday; thanks, mwm@berkeley]
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* vix 30dec86 [written]
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*/
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/* reorder these #include's at your peril */
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#include <sys/types.h>
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#include <sys/param.h>
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#include "compat.h"
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#include <stdio.h>
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#include <ctype.h>
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#include <bitstring.h>
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#include <sys/wait.h>
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#include "pathnames.h"
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#include "config.h"
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/* these are really immutable, and are
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* defined for symbolic convenience only
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* TRUE, FALSE, and ERR must be distinct
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*/
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#define TRUE 1
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#define FALSE 0
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/* system calls return this on success */
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#define OK 0
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/* or this on error */
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#define ERR (-1)
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/* turn this on to get '-x' code */
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#ifndef DEBUGGING
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#define DEBUGGING FALSE
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#endif
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#define READ_PIPE 0 /* which end of a pipe pair do you read? */
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#define WRITE_PIPE 1 /* or write to? */
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#define STDIN 0 /* what is stdin's file descriptor? */
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#define STDOUT 1 /* stdout's? */
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#define STDERR 2 /* stderr's? */
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#define ERROR_EXIT 1 /* exit() with this will scare the shell */
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#define OK_EXIT 0 /* exit() with this is considered 'normal' */
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#define MAX_FNAME 100 /* max length of internally generated fn */
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#define MAX_COMMAND 1000 /* max length of internally generated cmd */
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#define MAX_ENVSTR 1000 /* max length of envvar=value\0 strings */
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#define MAX_TEMPSTR 100 /* obvious */
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#define MAX_UNAME 20 /* max length of username, should be overkill */
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#define ROOT_UID 0 /* don't change this, it really must be root */
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#define ROOT_USER "root" /* ditto */
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/* NOTE: these correspond to DebugFlagNames,
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* defined below.
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*/
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#define DEXT 0x0001 /* extend flag for other debug masks */
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#define DSCH 0x0002 /* scheduling debug mask */
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#define DPROC 0x0004 /* process control debug mask */
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#define DPARS 0x0008 /* parsing debug mask */
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#define DLOAD 0x0010 /* database loading debug mask */
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#define DMISC 0x0020 /* misc debug mask */
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#define DTEST 0x0040 /* test mode: don't execute any commands */
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#define DBIT 0x0080 /* bit twiddling shown (long) */
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#define CRON_TAB(u) "%s/%s", SPOOL_DIR, u
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#define REG register
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#define PPC_NULL ((char **)NULL)
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 64
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#endif
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#define Skip_Blanks(c, f) \
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while (c == '\t' || c == ' ') \
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c = get_char(f);
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#define Skip_Nonblanks(c, f) \
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while (c!='\t' && c!=' ' && c!='\n' && c != EOF) \
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c = get_char(f);
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#define Skip_Line(c, f) \
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do {c = get_char(f);} while (c != '\n' && c != EOF);
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#if DEBUGGING
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# define Debug(mask, message) \
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if ( (DebugFlags & (mask) ) == (mask) ) \
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printf message;
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#else /* !DEBUGGING */
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# define Debug(mask, message) \
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;
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#endif /* DEBUGGING */
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#define MkLower(ch) (isupper(ch) ? tolower(ch) : ch)
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#define MkUpper(ch) (islower(ch) ? toupper(ch) : ch)
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#define Set_LineNum(ln) {Debug(DPARS|DEXT,("linenum=%d\n",ln)); \
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LineNumber = ln; \
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}
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#define FIRST_MINUTE 0
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#define LAST_MINUTE 59
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#define MINUTE_COUNT (LAST_MINUTE - FIRST_MINUTE + 1)
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#define FIRST_HOUR 0
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#define LAST_HOUR 23
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#define HOUR_COUNT (LAST_HOUR - FIRST_HOUR + 1)
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#define FIRST_DOM 1
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#define LAST_DOM 31
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#define DOM_COUNT (LAST_DOM - FIRST_DOM + 1)
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#define FIRST_MONTH 1
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#define LAST_MONTH 12
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#define MONTH_COUNT (LAST_MONTH - FIRST_MONTH + 1)
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/* note on DOW: 0 and 7 are both Sunday, for compatibility reasons. */
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#define FIRST_DOW 0
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#define LAST_DOW 7
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#define DOW_COUNT (LAST_DOW - FIRST_DOW + 1)
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/* each user's crontab will be held as a list of
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* the following structure.
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*
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* These are the cron commands.
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*/
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typedef struct _entry {
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struct _entry *next;
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char *cmd;
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bitstr_t bit_decl(minute, MINUTE_COUNT);
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bitstr_t bit_decl(hour, HOUR_COUNT);
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bitstr_t bit_decl(dom, DOM_COUNT);
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bitstr_t bit_decl(month, MONTH_COUNT);
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bitstr_t bit_decl(dow, DOW_COUNT);
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int flags;
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#define DOM_STAR 0x1
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#define DOW_STAR 0x2
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#define WHEN_REBOOT 0x4
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uid_t exec_uid; /* 0 = default, else uid */
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} entry;
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/* the crontab database will be a list of the
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* following structure, one element per user.
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*
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* These are the crontabs.
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*/
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typedef struct _user {
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struct _user *next, *prev; /* links */
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uid_t uid; /* uid from passwd file */
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gid_t gid; /* gid from passwd file */
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char **envp; /* environ for commands */
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time_t mtime; /* last modtime of crontab */
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entry *crontab; /* this person's crontab */
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} user;
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typedef struct _cron_db {
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user *head, *tail; /* links */
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time_t mtime; /* last modtime on spooldir */
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} cron_db;
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void set_cron_uid __P((void)),
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set_cron_cwd __P((void)),
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load_database __P((cron_db *)),
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open_logfile __P((void)),
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sigpipe_func __P((void)),
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job_add __P((entry *, user *)),
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do_command __P((entry *, user *)),
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link_user __P((cron_db *, user *)),
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unlink_user __P((cron_db *, user *)),
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free_user __P((user *)),
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unget_char __P((int, FILE *)),
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free_entry __P((entry *)),
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acquire_daemonlock __P((int)),
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skip_comments __P((FILE *)),
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log_it __P((char *, int, char *, char *));
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int job_runqueue __P((void)),
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set_debug_flags __P((char *)),
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get_char __P((FILE *)),
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get_string __P((char *, int, FILE *, char *)),
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swap_uids __P((void)),
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load_env __P((char *, FILE *)),
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cron_pclose __P((FILE *)),
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strcmp_until __P((char *, char *, int)),
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allowed __P((char *)),
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strdtb __P((char *));
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char *env_get __P((char *, char **)),
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*arpadate __P((time_t *)),
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*mkprints __P((unsigned char *, unsigned int)),
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*first_word __P((char *, char *)),
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**env_init __P((void)),
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**env_set __P((char **, char *));
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user *load_user __P((int, char *, int, int, char *, int)),
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*find_user __P((cron_db *, char *));
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entry *load_entry __P((FILE *, void (*)(), int));
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FILE *cron_popen __P((char *, char *));
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/* in the C tradition, we only create
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* variables for the main program, just
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* extern them elsewhere.
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*/
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#ifdef MAIN_PROGRAM
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# if !defined(LINT) && !defined(lint)
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char *copyright[] = {
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"@(#) Copyright 1988, 1989, 1990, 1993 by Paul Vixie",
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"@(#) All rights reserved"
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};
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# endif
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char *MonthNames[] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
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NULL
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};
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char *DowNames[] = {
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun",
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NULL
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};
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char *ProgramName;
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int LineNumber;
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time_t TargetTime;
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# if DEBUGGING
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int DebugFlags;
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char *DebugFlagNames[] = { /* sync with #defines */
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"ext", "sch", "proc", "pars", "load", "misc", "test", "bit",
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NULL /* NULL must be last element */
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};
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# endif /* DEBUGGING */
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#else /*MAIN_PROGRAM*/
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extern char *copyright[],
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*MonthNames[],
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*DowNames[],
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*ProgramName;
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extern int LineNumber;
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extern time_t TargetTime;
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# if DEBUGGING
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extern int DebugFlags;
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extern char *DebugFlagNames[];
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# endif /* DEBUGGING */
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#endif /*MAIN_PROGRAM*/
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