#ifndef _EFAXOS_H#define _EFAXOS_H/* 		efaxos.c - O/S-dependent routines		    Copyright 1995, Ed Casas*//* signals to be caught */#define ANSISIGS  SIGABRT, SIGFPE, SIGILL, SIGINT, SIGSEGV, SIGTERM#define UNIXSIGS  SIGHUP, SIGQUIT, SIGIOT, SIGALRM#define CATCHSIGS ANSISIGS, UNIXSIGS/* Bit order reversal table. */extern unsigned char normalbits [ ] ;typedef enum ttymodes		/* serial port modes:  */{   COMMAND,			/*   19200 8N1, no flow control, DTR high */    DROPDTR,			/*   ", DTR low */    SEND			/*   ", transmit-only XON/XOFF flow control */} ttymodes ;/* OS-specific i/o & delay functions *//* We define new stream i/o macros because it's not possible to   do non-blocking reads/writes with C stream i/o [UNIX select()   gives the status of the file, not the stream buffer].*/#define IBUFSIZE 1024	    /* read up to this many bytes at a time from fax */#define OBUFSIZE 1024	    /* maximum bytes to write at a time to fax */typedef struct tfilestruct {  int fd ;  unsigned char *ip, *iq, *op, *oq ;  unsigned char ibuf [ IBUFSIZE ], obuf[ OBUFSIZE ] ;  unsigned char *ibitorder, *obitorder ;} TFILE ;/* tgetc() is a macro like getc().  It evaluates to the next   character from the fax device or EOF after idle time t. */#define tgetc(f,t) ( (f)->ip >= (f)->iq && tundrflw(f,t) == EOF ? EOF : \		    *(unsigned char*)f->ip++ )/* tgetd() also removes DLE escapes, detects DLE-ETX terminators   and fixes bit order. Evaluates to the next character, EOF on   error/timeout, or -2 on DLE-ETX.  */#define IBUFC(f) ( ((unsigned char*)(f)->ip)[-1] )#define tgetd(f,t) ( tgetc(f,t) < 0 ? EOF : \       IBUFC(f) != DLE ? (f)->ibitorder[ IBUFC(f) ] : \       tgetc(f,t) == ETX ? -2 : \       ( IBUFC(f) == DLE || IBUFC(f) == SUB ) ? (f)->ibitorder [ DLE ] : \       msg ( "W0invalid escape sequence (DLE-%s) in data", \	    cname ( IBUFC(f) ) ) )/* tputc() is a macro like putc().  It evaluates to the character   written or EOF on error. */#define tputc(c,f,t) ( (f)->op >= (f)->oq && tflush(f,t) == EOF ? EOF : \		    (unsigned char) ( *(f)->op++ = (c) ) )/* tobytes() evaluates to the number of bytes in the output   buffer */#define tobytes(f) ( (f)->op - (f)->obuf ) int tundrflw ( TFILE *f, int t ) ;int tflush   ( TFILE *f, int t ) ;int tdata    ( TFILE *f, int t ) ;int ttyopen  ( TFILE *f, char *fname, int reverse ) ;int ttymode  ( TFILE *f, ttymodes mode ) ;void msleep  ( int t ) ;/* POSIX execl */extern int execl ( const char *path, const char *arg , ... ) ;/* UUCP-style device locks */#define HDBLKFLAG '#'	           /* prefix to force HDB (text) lock files */int lockall ( char **lkfiles ) ;   /* lock serial port using named files */int unlockall ( char **lkfiles ) ; /* unlock " */#endif