#include "apue.h"#include <errno.h>#define	CS_CALL	"/home/sar/calld"	/* well-known name */#define	CL_CALL	"call"#define	MAXSYSNAME	256#define	MAXSPEEDSTR	256/* * Number of structures to alloc/realloc for Client structs * (client.c) and Lock structs (lock.c). */#define	NALLOC	10#define	WHITE		" \t\n"				/* for separating tokens */#define	SYSTEMS		"./Systems"			/* my own copies for now */#define	DEVICES		"./Devices"#define	DIALERS		"./Dialers"extern int    clifd;extern int    Debug;	/* nonzero for dialing debug output */extern char   errmsg[];	/* error message string to return to client */extern char   *speed;	/* speed (actually "class") to use */extern char   *sysname;	/* name of system to call */extern uid_t  uid;      /* client's uid */extern volatile sig_atomic_t  chld_flag;	/* when SIGCHLD occurs */extern enum parity { NONE, EVEN, ODD } parity;	/* specified by client */typedef struct {	/* one Client struct per connected client */  int	fd;			/* fd, or -1 if available */  pid_t	pid;		/* child pid while dialing */  uid_t	uid;		/* client's user ID */  int	childdone;	/* nonzero when SIGCHLD from dialing child recvd:					   1 means exit(0), 2 means exit(1) */  long	sysftell;	/* next line to read in Systems file */  long	foundone;	/* true if we find a matching sysfile entry */  int	Debug;				/* option from client */  enum parity parity;		/* option from client */  char	speed[MAXSPEEDSTR];	/* option from client */  char	sysname[MAXSYSNAME];/* option from client */} Client;/* both manipulated by client_XXX() functions */extern Client *client;     /* ptr to malloc'ed array of Client structs */extern int    client_size; /* # entries in client[] array */typedef struct {	/* everything for one entry in Systems file */  char	*name;		/* system name */  char	*time;		/* (e.g., "Any") time to call (ignored) */  char	*type;		/* (e.g., "ACU") or system name if direct connect */  char	*class;		/* (e.g., "9600") speed */  char	*phone;		/* phone number or "-" if direct connect */  char	*login;		/* uucp login chat (ignored) */} Systems;typedef struct {	/* everything for one entry in Devices file */  char	*type;		/* (e.g., "ACU") matched by type in Systems */  char	*line;		/* (e.g., "cua0") without preceding "/dev/" */  char	*line2;		/* (ignored) */  char	*class;		/* matched by class in Systems */  char	*dialer;	/* name of dialer in Dialers */} Devices;typedef struct {	/* everything for one entry in Dialers file */  char	*dialer;	/* matched by dialer in Devices */  char	*sub;		/* phone number substitution string (ignored) */  char	*expsend;	/* expect/send chat */} Dialers;extern Systems	systems;	/* filled in by sys_next() */extern Devices	devices;	/* filled in by dev_next() */extern Dialers	dialers;	/* filled in by dial_next() */void  child_dial(Client *);					/* childdial.c */int   cli_args(int, char **);				/* cliargs.c */int   client_add(int, uid_t);				/* client.c */void  client_del(int);void  client_sigchld(pid_t, int);void  loop(void);							/* loop.c */char  *ctl_str(unsigned char);				/* ctlstr.c */int   dev_find(Devices *, const Systems *);	/* devfile.c */int   dev_next(Devices *);void  dev_rew(void);int   dial_find(Dialers *, const Devices *); /* dialfile.c */int   dial_next(Dialers *);void  dial_rew(void);int   expect_str(int, char *);				/* expectstr.c */int   request(Client *);					/* request.c */int   send_str(int, char *, char *, int);	/* sendstr.c */void  sig_chld(int);						/* sigchld.c */long  sys_next(Systems *);					/* sysfile.c */void  sys_posn(long);void  sys_rew(void);int   tty_open(char *, char *, enum parity, int);	/* ttyopen.c */int   tty_dial(int, char *, char *, char *, char *);	/* ttydial.c */pid_t is_locked(char *);					/* lock.c */void  lock_set(char *, pid_t);void  lock_rel(pid_t);void  DEBUG(char *, ...);					/* debug.c */void  DEBUG_NONL(char *, ...);