/* cron.h - header for vixie's cron * * Copyright 1988,1990,1993 by Paul Vixie * All rights reserved * * Distribute freely, except: don't remove my name from the source or * documentation (don't take credit for my work), mark your changes (don't * get me blamed for your possible bugs), don't alter or remove this * notice. May be sold if buildable source is provided to buyer. No * warrantee of any kind, express or implied, is included with this * software; use at your own risk, responsibility for damages (if any) to * anyone resulting from the use of this software rests entirely with the * user. * * Send bug reports, bug fixes, enhancements, requests, flames, etc., and * I'll try to keep a version up to date. I can be reached as follows: * Paul Vixie, 329 Noe Street, San Francisco, CA, 94114, (415) 864-7013, * paul@vixie.sf.ca.us || {hoptoad,pacbell,decwrl,crash}!vixie!paul */ #ifndef _CRON_FLAG #define _CRON_FLAG #include #include #include #include #include #include "config.h" /* these are really immutable, and are * defined for symbolic convenience only * TRUE, FALSE, and ERR must be distinct */ #define TRUE 1 #define FALSE 0 /* system calls return this on success */ #define OK 0 /* or this on error */ #define ERR (-1) /* meaningless cookie for smart compilers that will pick their * own register variables; this makes the code neater. */ #define local /**/ /* turn this on to get '-x' code */ #ifndef DEBUGGING #define DEBUGGING FALSE #endif #define READ_PIPE 0 /* which end of a pipe pair do you read? */ #define WRITE_PIPE 1 /* or write to? */ #define STDIN 0 /* what is stdin's file descriptor? */ #define STDOUT 1 /* stdout's? */ #define STDERR 2 /* stderr's? */ #define ERROR_EXIT 1 /* exit() with this will scare the shell */ #define OK_EXIT 0 /* exit() with this is considered 'normal' */ #define MAX_FNAME 100 /* max length of internally generated fn */ #define MAX_COMMAND 1000 /* max length of internally generated cmd */ #define MAX_ENVSTR 1000 /* max length of envvar=value\0 strings */ #define MAX_TEMPSTR 100 /* obvious */ #define MAX_UNAME 20 /* max length of username, should be overkill */ #define ROOT_UID 0 /* don't change this, it really must be root */ #define ROOT_USER "root" /* ditto */ /* NOTE: these correspond to DebugFlagNames, * defined below. */ #define DEXT 0x0001 /* extend flag for other debug masks */ #define DSCH 0x0002 /* scheduling debug mask */ #define DPROC 0x0004 /* process control debug mask */ #define DPARS 0x0008 /* parsing debug mask */ #define DLOAD 0x0010 /* database loading debug mask */ #define DMISC 0x0020 /* misc debug mask */ #define DTEST 0x0040 /* test mode: don't execute any commands */ /* the code does not depend on any of vfork's * side-effects; it just uses it as a quick * fork-and-exec. */ #if defined(BSD) # define VFORK vfork #endif #if defined(ATT) # define VFORK fork #endif #define CRON_TAB(u) "%s/%s", SPOOL_DIR, u #define REG register #define PPC_NULL ((char **)NULL) #ifndef MAXHOSTNAMELEN #define MAXHOSTNAMELEN 64 #endif #define Skip_Blanks(c, f) \ while (c == '\t' || c == ' ') \ c = get_char(f); #define Skip_Nonblanks(c, f) \ while (c!='\t' && c!=' ' && c!='\n' && c != EOF) \ c = get_char(f); #define Skip_Line(c, f) \ do {c = get_char(f);} while (c != '\n' && c != EOF); #if DEBUGGING # define Debug(mask, message) \ if ( (DebugFlags & (mask) ) == (mask) ) \ printf message; #else /* !DEBUGGING */ # define Debug(mask, message) \ ; #endif /* DEBUGGING */ #define MkLower(ch) (isupper(ch) ? tolower(ch) : ch) #define MkUpper(ch) (islower(ch) ? toupper(ch) : ch) #define Set_LineNum(ln) {Debug(DPARS|DEXT,("linenum=%d\n",ln)); \ LineNumber = ln; \ } #define FIRST_MINUTE 0 #define LAST_MINUTE 59 #define MINUTE_COUNT (LAST_MINUTE - FIRST_MINUTE + 1) #define FIRST_HOUR 0 #define LAST_HOUR 23 #define HOUR_COUNT (LAST_HOUR - FIRST_HOUR + 1) #define FIRST_DOM 1 #define LAST_DOM 31 #define DOM_COUNT (LAST_DOM - FIRST_DOM + 1) #define FIRST_MONTH 1 #define LAST_MONTH 12 #define MONTH_COUNT (LAST_MONTH - FIRST_MONTH + 1) /* note on DOW: 0 and 7 are both Sunday, for compatibility reasons. */ #define FIRST_DOW 0 #define LAST_DOW 7 #define DOW_COUNT (LAST_DOW - FIRST_DOW + 1) /* each user's crontab will be held as a list of * the following structure. * * These are the cron commands. */ typedef struct _entry { struct _entry *next; char *cmd; bitstr_t bit_decl(minute, MINUTE_COUNT); bitstr_t bit_decl(hour, HOUR_COUNT); bitstr_t bit_decl(dom, DOM_COUNT); bitstr_t bit_decl(month, MONTH_COUNT); bitstr_t bit_decl(dow, DOW_COUNT); int flags; # define DOM_STAR 0x1 # define DOW_STAR 0x2 # define WHEN_REBOOT 0x4 } entry; /* the crontab database will be a list of the * following structure, one element per user. * * These are the crontabs. */ typedef struct _user { struct _user *next, *prev; /* links */ uid_t uid; /* uid from passwd file */ gid_t gid; /* gid from passwd file */ char **envp; /* environ for commands */ time_t mtime; /* last modtime of crontab */ entry *crontab; /* this person's crontab */ } user; typedef struct _cron_db { user *head, *tail; /* links */ time_t mtime; /* last modtime on spooldir */ } cron_db; /* in the C tradition, we only create * variables for the main program, just * extern them elsewhere. */ #ifdef MAIN_PROGRAM # if !defined(LINT) && !defined(lint) static char *copyright[] = { "@(#) Copyright (C) 1988, 1989, 1990 by Paul Vixie", "@(#) All rights reserved" }; # endif char *MonthNames[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", NULL}; char *DowNames[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun", NULL}; char *ProgramName; int LineNumber; time_t TargetTime; # if DEBUGGING int DebugFlags; char *DebugFlagNames[] = { /* sync with #defines */ "ext", "sch", "proc", "pars", "load", "misc", "test", NULL}; /* NULL must be last element */ # endif /* DEBUGGING */ #else /* !MAIN_PROGRAM */ extern char *MonthNames[]; extern char *DowNames[]; extern char *ProgramName; extern int LineNumber; extern time_t TargetTime; # if DEBUGGING extern int DebugFlags; extern char *DebugFlagNames[]; # endif /* DEBUGGING */ #endif /* MAIN_PROGRAM */ #endif /* _CRON_FLAG */