/* Copyright 1988,1990,1993,1994 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 uunet!decwrl!vixie!paul */ /* cron.h - header for vixie's cron * * $Id: cron.h,v 1.4 2000/08/21 20:57:53 deraadt Exp $ * * vix 14nov88 [rest of log is in RCS] * vix 14jan87 [0 or 7 can be sunday; thanks, mwm@berkeley] * vix 30dec86 [written] */ /* reorder these #include's at your peril */ #include #include #include "compat.h" #include #include #include #include #include #include "pathnames.h" #include "config.h" #include "externs.h" /* these are really immutable, and are * defined for symbolic convenience only * TRUE, FALSE, and ERR must be distinct * ERR must be < OK. */ #define TRUE 1 #define FALSE 0 /* system calls return this on success */ #define OK 0 /* or this on error */ #define ERR (-1) /* 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 */ #define DBIT 0x0080 /* bit twiddling shown (long) */ #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; \ } typedef int time_min; #define SECONDS_PER_MINUTE 60 #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; uid_t uid; gid_t gid; char **envp; 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 0x01 #define DOW_STAR 0x02 #define WHEN_REBOOT 0x04 #define MIN_STAR 0x08 #define HR_STAR 0x10 } entry; /* the crontab database will be a list of the * following structure, one element per user * plus one for the system. * * These are the crontabs. */ typedef struct _user { struct _user *next, *prev; /* links */ char *name; 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; void set_cron_uid __P((void)), set_cron_cwd __P((void)), load_database __P((cron_db *)), open_logfile __P((void)), sigpipe_func __P((void)), job_add __P((entry *, user *)), do_command __P((entry *, user *)), link_user __P((cron_db *, user *)), unlink_user __P((cron_db *, user *)), free_user __P((user *)), env_free __P((char **)), unget_char __P((int, FILE *)), free_entry __P((entry *)), acquire_daemonlock __P((int)), skip_comments __P((FILE *)), log_it __P((char *, int, char *, char *)), log_close __P((void)); int job_runqueue __P((void)), set_debug_flags __P((char *)), get_char __P((FILE *)), get_string __P((char *, int, FILE *, char *)), swap_uids __P((void)), swap_uids_back __P((void)), load_env __P((char *, FILE *)), cron_pclose __P((FILE *)), strcmp_until __P((char *, char *, int)), allowed __P((char *)), strdtb __P((char *)); char *env_get __P((char *, char **)), *arpadate __P((time_t *)), *mkprints __P((unsigned char *, unsigned int)), *first_word __P((char *, char *)), **env_init __P((void)), **env_copy __P((char **)), **env_set __P((char **, char *)); user *load_user __P((int, struct passwd *, char *)), *find_user __P((cron_db *, char *)); entry *load_entry __P((FILE *, void (*)(), struct passwd *, char **)); FILE *cron_popen __P((char *, char *, entry *)); /* in the C tradition, we only create * variables for the main program, just * extern them elsewhere. */ #ifdef MAIN_PROGRAM # if !defined(LINT) && !defined(lint) char *copyright[] = { "@(#) Copyright 1988,1989,1990,1993,1994 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 StartTime; time_min timeRunning; time_min virtualTime; time_min clockTime; # if DEBUGGING int DebugFlags; char *DebugFlagNames[] = { /* sync with #defines */ "ext", "sch", "proc", "pars", "load", "misc", "test", "bit", NULL /* NULL must be last element */ }; # else #define DebugFlags 0 # endif /* DEBUGGING */ #else /*MAIN_PROGRAM*/ extern char *copyright[], *MonthNames[], *DowNames[], *ProgramName; extern int LineNumber; extern time_t StartTime; extern time_min timeRunning; extern time_min virtualTime; extern time_min clockTime; # if DEBUGGING extern int DebugFlags; extern char *DebugFlagNames[]; # endif /* DEBUGGING */ #endif /*MAIN_PROGRAM*/