#include "config.h"
#ifndef lint
static char rcsid[] ATTR_UNUSED = "$Id$";
#endif

/*
 * $Log$
 * Revision 1.5  1999/07/19 10:02:51  short
 * Removed '\xXY' chars for compatibility with Digital UNIX vendor "cc".
 *
 * Revision 1.4  1999/07/14 01:01:11  short
 * Termios made compatible with Digital UNIX 4.0, cfset[io]speed() missing.
 *
 * Revision 1.3  1999/06/03 11:46:41  short
 * Logging (--log) implemented.
 *
 * Revision 1.2  1999/06/03 10:38:52  short
 * Implemented remaining communication timeouts and maximum retry count.
 *
 * Revision 1.1.1.1  1999/05/26 13:06:26  short
 * First alpha release.
 *
 */

#include "setup.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <stdarg.h>
#include <limits.h>
#include <ctype.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <time.h>

#ifdef HAVE_GETOPT_LONG
#include <getopt.h>
#else
#include "getopt.h"
#endif

#if 0
char *strdup(const char *s);
int kill(pid_t pid,int sig);
int snprintf(char *str,size_t n,const char *format,...);
int vsnprintf(char *str,size_t n,const char *format,va_list ap);
void usleep(unsigned long usec);
#endif

#define NELEM(x) (sizeof((x))/sizeof(*(x)))

#ifndef DEBUG
#define dbg(cmd)
#else
#define dbg(cmd) cmd
#endif
/* ANSI C does not allow macro with variable arguments */
#define dO stderr
#define dB(a) dbg(fprintf a)

#define d1(n1)          dB((dO,n1         ))
#define d2(n1,n2)       dB((dO,n1,n2      ))
#define d3(n1,n2,n3)    dB((dO,n1,n2,n3   ))
#define d4(n1,n2,n3,n4) dB((dO,n1,n2,n3,n4))

static const char version[]="This is MobilDock SMS sender (" PACKAGE " " VERSION ")\n";

static int verbose
#ifdef DEBUG
	=0xFFFF
#endif
	;
static char *pname;
static int dis_cleanup=0,devfd=-1;

static char *phone,*body,*device,*logname,*lockfile,*smsc,*maxretry,*readtime,*chartime,*cmdtime;
static int readbody;
static long maxretryn=DEF_MAXRETRY,readtimen=DEF_READTIME,chartimen=DEF_CHARTIME,cmdtimen=DEF_CMDTIME;
static size_t bodylen;

static char *devicename; /* path stripped */
static char lockreal[512],locked;

static struct termios restios,tios;
static char restios_yes;
static FILE *logf;

static void vlogmsg(
#ifndef PRINTF_WORKS_PM
		char outerr,
#endif
		const char *fmt,va_list ap)
{
time_t stamp;
char *ctm,*s;
pid_t mypid=-1;
char host[LINE_MAX];

	if (!logf) return;
	if (mypid==-1) {
		mypid=getpid();
		if (gethostname(host,sizeof(host))) strcpy(host,"<ERROR>");
		}
	time(&stamp);
	ctm=ctime(&stamp);
	if ((s=strchr(ctm,'\n'))) *s='\0';
	fprintf(logf,"%s %s %s[%d]: ",ctm,host,pname,mypid);
	vfprintf(logf,fmt,ap);
#ifndef PRINTF_WORKS_PM
	if (outerr) fputs(strerror(errno),logf);
#endif
	fputc('\n',logf);
	fflush(logf);
}

static void logmsg(const char *fmt,...)
{
va_list ap;
	va_start(ap,fmt);
	vlogmsg(
#ifndef PRINTF_WORKS_PM
		0,
#endif
		fmt,ap);
	va_end(ap);
}

static void error(const char *fmt,...)
{
va_list ap;
char fatal=*fmt;
#ifndef PRINTF_WORKS_PM
char pm,*nfmt;
size_t fmtl;
#endif

	if (fatal=='!' || fatal=='.' || fatal=='\n') fmt++;
	else fatal=0;

#ifndef PRINTF_WORKS_PM
	if (!(nfmt=strdup(fmt))) return;
	fmtl=strlen(fmt);
	if ((pm=(fmtl>=2 && !strcmp(fmt+fmtl-2,"%m")))) nfmt[fmtl-2]='\0';
#endif

	fprintf(stderr,"%s: ",pname);
	va_start(ap,fmt);
	vfprintf(stderr,
#ifdef PRINTF_WORKS_PM
		fmt
#else
		nfmt
#endif
		,ap);
	if (fatal=='!') vlogmsg(
#ifdef PRINTF_WORKS_PM
		fmt
#else
		pm,nfmt
#endif
		,ap);
	va_end(ap);

#ifndef PRINTF_WORKS_PM
	if (pm) {
		fputs(strerror(errno),stderr);
		free(nfmt);
		}
#endif

	if (fatal!='\n') fputc((fatal=='.'?'.':'!'),stderr);
	fputc('\n',stderr);
	if (fatal=='!') exit(EXIT_FAILURE);
}

static void chk(void *p)
{
	if (p) return;
	error("!Virtual memory exhausted");
}

static void cleanup(void)
{
	d1("cleanup()\n");
	if (dis_cleanup) return;
	if (restios_yes) {
		if (tcsetattr(devfd,TCSANOW,&restios))
			error("Error restoring termios for device: %m");
		restios_yes=0;
		}
	if (locked && *lockreal) {
		d2("Removing lockfile \"%s\"\n",lockreal);
		if (unlink(lockreal))
			error("Error removing my device lockfile \"%s\": %m",lockreal);
		locked=0;
		}
	dis_cleanup=1;
	exit(EXIT_FAILURE);
}

static void usage(void)
{
	fprintf(stderr,"\
\n\
%s\
\n\
Usage: " PACKAGE " [-c|--config <cfgfile>] [-d|--device <device>]\n\
             [-L|--log <file>]\n\
             [-l|--lockfile <lock>] [-s|--smsc <smsc #>] [-m|--maxretry <#>]\n\
             [-r|--readtime <sec>] [-t|--chartime <msec>] [-T|--cmdtime <msec>]\n\
             [-f|--file] [-v|--verbose] [-h|--help] [-V|--version]\n\
             <dest. phone> <msg text|msg filename>\n\
\n\
 -c, --config\tRead this additional config file\n\
\t\t(def. \"" CONFIG_MAIN "\" and \"$HOME" CONFIG_HOME "\")\n\
 -d, --device\tMobilDock on this serial device (def. \"" DEF_DEVICE "\")\n\
 -L, --log\tLog all important messages to this file (def. \"" DEF_LOGNAME "\")\n\
 -l, --lockfile\tLock serial port by this file, \"%%s\" is basename of device\n\
\t\t(def. \"%s\")\n\
 -s, --smsc\tUse this SMS Center number (def. query from Siemens A1)\n\
 -m, --maxretry\tMaximum retries of any command before giving up (def. %d)\n\
 -r, --readtime\tSeconds for maximum wait time for response (def. %ds)\n\
 -t, --chartime\tMilliseconds between each char on baud 19200 (def. %dms)\n\
 -T, --cmdtime\tMilliseconds before each whole AT command (def. %dms)\n\
 -f, --file\tRead contents of message from file instead\n\
 -v, --verbose\tIncrease verbosity level, more \"-v\"s give more messages\n\
 -h, --help\tPrint a summary of the options\n\
 -V, --version\tPrint the version number\n\
\n",version,DEF_LOCKFILE,DEF_MAXRETRY,DEF_READTIME,DEF_CHARTIME,DEF_CMDTIME);
	exit(EXIT_FAILURE);
}

static const struct option longopts[]={
{"config"  ,1,0,'c'},
{"device"  ,1,0,'d'},
{"log"     ,1,0,'l'},
{"lockfile",1,0,'l'},
{"smsc"    ,1,0,'s'},
{"maxretry",1,0,'m'},
{"readtime",1,0,'r'},
{"chartime",1,0,'t'},
{"cmdtime" ,1,0,'T'},
{"file"    ,0,0,'f'},
{"verbose" ,0,0,'v'},
{"help"    ,0,0,'h'},
{"version" ,0,0,'V'}};

static void processargs(int argp,char **args,const char *from);

static char *cfgstack[MAXCFGLOOP];
static unsigned cfgstacki=0;

static void chkfclose(FILE *f,const char *fname)
{
	if (fclose(f))
		error("Error closing \"%s\": %m",fname);
}

static void readfile(const char *fname,char quiet)
{
FILE *f;
size_t got;
char *args[MAXCFGARGS],*d,*s,blank,quote;
unsigned argp;
char *buf;
long size;
static unsigned tot=0;

	if (tot++>=MAXCFGNUM) {
		if (tot==MAXCFGNUM+1) error("Too many config files to read, max is %d, break-out",MAXCFGNUM);
		return;
		}
	if (!(f=fopen(fname,"rt"))) {
		if (!quiet) error("Can't open config file \"%s\" for r/o: %m",fname);
		return;
		}
	if (verbose>=2) error(".Reading config file \"%s\"",fname);
	if (fseek(f,0,SEEK_END))
		error("Error seeking to end of \"s\": %m",fname);
	if ((size=ftell(f))<0)
		size=0,error("Error measuring \"%s\": %m",fname);
	if (size>MAXCONFIG) 
		error("File \"%s\" is too long, read only %ld bytes",fname,MAXCONFIG);
	chk(buf=malloc((size?size:MAXCONFIG)+1));
	rewind(f);
	got=fread(buf,1,(size?size:MAXCONFIG),f);
	if (size && got!=size)
		error("File \"%s\" read error, got only %u bytes of %ld",fname,got,size);
	chkfclose(f,fname);
	buf[got]='\0';
	args[0]=pname;
	for (argp=1,d=s=buf,blank=1,quote=0;s<buf+got;s++) {
char c=*s;

		if (!quote && isspace(c)) {
			if (!blank) {
				*d='\0';
				blank=1;
				if (verbose>=2) error("\nConfig \"%s\": arg#%d: %s",fname,argp-1,args[argp-1]);
				}
			continue;
			}
		if (blank) {
			if (argp>=NELEM(args)-1) {
				error("Too many arguments in \"%s\", from offset %d ignored",fname,s-buf);
				break;
				}
			args[argp++]=s;
			d=s;
			blank=0;
			}
		if (c=='\\') { *d++=*++s; continue; }
		if (c=='"' || c=='\'') {
			if (!quote   ) { quote=c; continue; }
			if ( quote==c) { quote=0; continue; }
			/* FALLTHRU */
			}
		*d++=c;
		}
	args[argp]=NULL;
	processargs(argp,args,fname);
	free(buf);
}

static struct {
	const char c;
	char **const var;
	unsigned stamp;
	} optset[]={
		{ 'd',&device   },
		{ 'L',&logname  },
		{ 'l',&lockfile },
		{ 's',&smsc     },
		{ 'm',&maxretry },
		{ 'r',&readtime },
		{ 't',&chartime },
		{ 'T',&cmdtime  },
	};

static void processargs(int argp,char **args,const char *from)
{
int optc;
static unsigned seq=0;
int i;

	seq++;
	optarg=NULL; optind=0; /* FIXME: Possible portability problem. */
	while ((optc=getopt_long(argp,args,"c:d:L:l:s:m:r:t:T:fvhV",longopts,NULL))!=EOF) switch (optc) {
		case 'c':
			if (cfgstacki>=NELEM(cfgstack)) {
				error("Looping (%d) during attempt to read config file \"%s\", break-out",NELEM(cfgstack),optind);
				break;
				}
			chk(cfgstack[cfgstacki++]=strdup(optarg));
			break;
		case 'd': case 'L': case 'l': case 's': case 'm': case 'r': case 't': case 'T':
			for (i=0;i<NELEM(optset);i++)
				if (optset[i].c==optc) {
					if (optset[i].stamp && optset[i].stamp!=seq) {
						assert(!!*optset[i].var);
						break;
						}
					free(*optset[i].var);
					chk(*optset[i].var=strdup(optarg));
					optset[i].stamp=seq;
					break;
					}
			assert(i<NELEM(optset));
			break;
		case 'f':
			readbody++;
			break;
		case 'v':
			verbose++;
			break;
		case 'V':
			fprintf(stderr,version);
			exit(EXIT_FAILURE);
		default:
			if (optc!='h')
				error("\nLast getopt(3) error occured during parsing option %d from \"%s\"! Follows help:",optind-1,from);
			usage();
			break;
		}
	if (!phone && optind<argp)
		chk(phone=strdup(args[optind++]));
	if (!body && optind<argp) {
char *d;
int i;

		for (i=optind,bodylen=argp-optind;i<argp;i++)
			bodylen+=strlen(args[i]);
		chk(body=malloc(bodylen));
		for (d=body,i=optind;i<argp;i++) {
size_t l=strlen(args[i]);
			memcpy(d,args[i],l);
			d+=l;
			*d++=' ';
			assert(d<=body+bodylen);
			}
		assert(d==body+bodylen);
		d[-1]='\0';
		bodylen--;
		}
	while (cfgstacki) {
char *s=cfgstack[--cfgstacki];

		assert(cfgstacki>=0);
		readfile(s,0);
		free(s);
		assert(cfgstacki>=0 && cfgstacki<NELEM(cfgstack));
		}
}

static const struct {
	char **var;
	const char *name;
	} nullcheck[]={
		{&phone,"destination phone number"},
#if 0
		{&body ,"body text"},
		{&device,"device for communication"},
#endif
	};
static char **emptycheck[]={&logname,&smsc,&body};

static void lockclose(int fd)
{
	if (close(fd))
		error("Error closing lockfile \"%s\"",lockreal);
}

static inline void lockdevice(void)
{
int fd=-1;
char buf[64];
ssize_t got;
int delay=0;
char empty=0;
pid_t pid;

	for (;;) {
		if (fd!=-1) lockclose(fd);
recheck:
		if (delay) sleep(delay);
		delay=DEVLOCK_PERIOD;
		if (verbose>=3) error(".Checking the lockfile \"%s\"..",lockreal);
		if ((fd=open(lockreal,O_RDONLY))==-1) break;
		if ((got=read(fd,buf,sizeof(buf)-1))<=0) {
isempty:
			if (empty>=DEVLOCK_MAXEMPTY) {
				error(".Lockfile \"%s\" is still not valid, removing it",lockreal);
				goto remove;
				}
			empty++;
			continue;
			}
		assert(got<sizeof(buf));
		buf[got]='\0';
		if (sscanf(buf,"%d",&pid)!=1) goto isempty;
		empty=0;
		errno=0;
		if (kill(pid,0) && errno!=ESRCH && errno!=EPERM)
			error("Error during checking consciousness of PID %d: %m",pid);
		if (errno!=ESRCH) continue;
		error(".Lockfile \"%s\" is stale (PID %d), removing it",lockreal,pid);
remove:
		lockclose(fd);
		if (unlink(lockreal))
			error("Error removing foreign lockfile \"%s\": %m",lockreal);
		break;
		}
	errno=0;
	if ((fd=open(lockreal,O_WRONLY|O_CREAT|O_EXCL,0644))==-1) {
		if (errno==EEXIST) goto recheck;
		error("!Error creating lockfile \"%s\": %m",lockreal);
		}
	locked=1;
	got=VARPRINTF(buf,"%010d\n",getpid()); assert(got==11);
	if (write(fd,buf,got)!=got)
		error("!Error writing data to lockfile \"%s\": %m",lockreal);
	lockclose(fd);
}

static char wasalarm=0;
static void sigalarm(int signo)
{
	signal(SIGALRM,(RETSIGTYPE (*)(int))sigalarm);
	wasalarm=1;
	if (verbose>=1) error("Timed out");
}

static void blocking(char yes)
{
static char state=-1;
	if (state==yes) return;
	if (fcntl(devfd,F_SETFL,(yes?0:O_NONBLOCK)))
		error("!fcntl() on device for %sblocking mode: %m",(yes?"":"non-"));
	state=yes;
}

static const char *record;
static char *catchdata;
static size_t catchdatal,catchdatasiz;

static void catched(const char *end)
{
size_t len;
void *p;

	if (!record) return;
	assert(end>=record);
	if ((p=memchr(record,'\n',end-record))) end=p;
	if ((len=end-record)) {
		if (catchdatal+len>catchdatasiz)
			chk(catchdata=realloc(catchdata,
				(catchdatasiz=MAX(LINE_MAX,(catchdatal+len)*2))));
		memcpy(catchdata+catchdatal,record,len);
		catchdatal+=len;
		}
	record=(p?NULL:end);
	assert(catchdatal<=catchdatasiz);
}

static int retrycnt=0;
static void retrying(void)
{
	if (++retrycnt>maxretryn) error("!Maximum command retry count (%d) exceeded",maxretryn);
	if (verbose>=2) error(".Retrying phase, %d out of %d..",retrycnt,maxretryn);
}

static char *devcmd(const char *term,const char *catch,const char *send,...)
{
size_t l,bufl,terml,catchl,fragl,offs;
char buf[LINE_MAX];
ssize_t got;
char *hit,*s;
va_list ap;
char errout;

	if (!term) term="\nOK\n";
	if ((errout=(*send=='!'))) send++;
	if (0) {
err:
		alarm(0);
		if (errout) return(NULL);
		retrying();
		}
	catchdatal=0;
	va_start(ap,send);
	l=VARVPRINTF(buf,send,ap); bufl=l+1;
	va_end(ap);
	if (bufl>=sizeof(buf)-1) error("!Command too big (%d>%d)",bufl,sizeof(buf)-1);
	if (verbose>=2) error(".devcmd(send=\"%s\",term=\"%s\",catch=\"%s\")",buf,term,catch);
	buf[l]='\r'; buf[l+1]='\n';
	for (offs=0,got=0;offs<bufl;offs++) {
		alarm(MAXSENDTIME);
		usleep((offs?chartimen:cmdtimen)*1000);
		if (!offs && tcflush(devfd,TCIOFLUSH))
			error("Error flushing I/O queue of device: %m");
		if (write(devfd,buf+offs,1)!=1) break;
		got++;
		if (tcdrain(devfd))
			error("Error forcing output of char %d of cmd \"%s\": %m",offs,buf);
		}
	alarm(0);
	if (got!=bufl) {
		error("Wrote only %d of %d bytes of command: %m",got,bufl);
		goto err;
		}

	if (!(terml=strlen(term))) {
		assert(!catch);
		return(NULL);
		}
	if (catch) {
		catchl=strlen(catch);
		fragl=MAX(terml,catchl);
		}
	else fragl=terml;
	fragl=MAX(fragl,MAX(strlen(ERROR_SUBSTR1),strlen(ERROR_SUBSTR2)));
	bufl=0;
	record=NULL;
	wasalarm=0;
	alarm(readtimen);
	for (;;) {
		blocking(0);
		errno=0;
		got=read(devfd,buf+bufl,sizeof(buf)-1-bufl);
		if (got==-1 && errno==EAGAIN) {
			blocking(1);
			errno=0;
			got=read(devfd,buf+bufl,1);
			}
		if (got<=0) {
			if (wasalarm) error("!Maximum response timeout (%ds) exceeded",readtimen);
			error("Couldn't read device data (ret=%d): %m",got);
			goto err;
			}
		s=buf+bufl;
		bufl+=got;
		/* FIXME: '\0' conversion */
		while (buf+bufl>s && (s=memchr(s,'\r',buf+bufl-s))) *s='\n';
		catched(buf+bufl); assert(!record || record==buf+bufl);
		assert(bufl<sizeof(buf));
		if (bufl>=fragl) {
			buf[bufl]='\0';
			assert(strlen(buf)==bufl);
			/* d3(">%s|%s<\n",buf,term); */
			if (strstr(buf,ERROR_SUBSTR1) || strstr(buf,ERROR_SUBSTR2)) {
				error("Found ERROR response on command \"%s\"",send);
				goto err;
				}
			if (catch && bufl>=catchl && (hit=strstr(buf,catch))) {
				record=hit+catchl;
				catched(buf+bufl); assert(!record || record==buf+bufl);
				}
			if (         bufl>= terml && (hit=strstr(buf,term))) break;
			memmove(buf,buf+bufl-(fragl-1),fragl-1);
			bufl=fragl-1;
			if (record) record=buf+bufl;
			}
		}
	alarm(0);
	if (!catchdatal) {
		if (!catch) return(NULL);
		error("Data requested on command \"%s\" but no found after term \"%s\"",send,term);
		goto err;
		}
	assert(!!catch);
	record=buf;
	buf[0]='\0';
	catched(buf+1);
	if (verbose>=2) error(".Returning data \"%s\" for cmd \"%s\"",catchdata,send);
	return(catchdata);
}

static int prepaddr(unsigned char *d,const char *addr)
{
int tot=0;
char flip=0,plus;
unsigned char n;

	if ((plus=(*addr=='+'))) addr++;
	*++d=(plus?ADDR_INT:ADDR_NAT);
	while (*addr) {
		if (*addr<'0' || *addr>'9')
			error("!Error during conversion of number at: %s",addr);
		tot++;
		n=(*addr++)-'0';
		if ((flip=!flip)) *++d=0xF0|n;
		else *d=(*d&0x0F)|(n<<4U);
		}
	return(tot);
}

static char *finalsmsc;
#define SMSCBINSIZE (1+1+(MAXNUMLEN+1)/2)
static char pdusmsc[SMSCBINSIZE*2+1];

static inline char tohex(unsigned char x)
{
	x&=0x0F;
	if (x<10) return(x   +'0');
	          return(x-10+'A');
}

static void textconv(char *d,unsigned char *s,size_t len)
{
	while (len--) {
		*d++=tohex(*s>>4U);
		*d++=tohex(*s    );
		s++;
		}
	*d='\0';
}

static inline void smscset(void)
{
char *s,*t,*e,*serr;
long l;
unsigned char bin[2+(MAXNUMLEN+1)/2];

	if (smsc) devcmd(NULL,NULL,"\r\nAT+CSCA=\"%s\"",smsc);
	s=devcmd(NULL,"\n+CSCA:","\r\nAT+CSCA?");
	while (isspace(*s)) s++;
	if (!*s || !strcmp(s,"EMPTY"))
		error("!No SMS set in A1 found");
	if (verbose>=1) error("\nFound default SMSC in A1: %s",s);
	if (*s!='"') error("!No left-quote found in: %s",s);
	if (!(t=strrchr(s+1,'"'))) error("!No right-quote found in: %s",s);
	e=t++;
	while (isspace(*t)) t++;
	if (*t++!=',') error("!No comma found after quotes in: %s",s);
	while (isspace(*t)) t++;
	l=strtol(t,&serr,10);
	if ((l!=ADDR_NAT && l!=ADDR_INT) || (serr && *serr))
		error("!Type parse error in: %s",s);
	if (l==ADDR_NAT || s[1]=='+') s++;
	else *s='+';
	*e='\0';
	chk(finalsmsc=strdup(s));
	if (verbose>=2) error("\nDecoded SMSC address: %s",finalsmsc);
	bin[0]=1+(prepaddr(bin,finalsmsc)+1)/2;
	textconv(pdusmsc,bin,bin[0]+1);
}

static char *pdudata;

static inline unsigned char charconv(char c,size_t offs)
{
	if ((c>='A' && c<='Z') || (c>='a' && c<='z') || (c>='0' && c<='9')) return(c);
	switch (c) {
		case '@': return(0);
		case '$': return(2);
		case '"': return(96);
		case ' ':
			return(c);
		case 0: assert(0);
		}
	error("Can't convert character '%c' (0x%02X) at offs %d (0-based), substituted '?'",
		c,(unsigned char)c,offs);
	return('?');
}

static inline void genpdu(void)
{
static unsigned char pdu[64+MAXNUMLEN/2+(MAXBODYLEN*7)/8];
unsigned char *d=pdu;
int i;
char inb=0,outb=0,xb;
unsigned char inreg;
size_t offs=0;

	*d++=PDU_TYPE;
	*d++=PDU_MR;
	i=prepaddr(d,phone);
	*d=i; d+=1+1+(i+1)/2;
	*d++=PDU_PID;
	*d++=PDU_DCS;
	*d++=PDU_VP;
	if (bodylen>MAXBODYLEN) {
		error("Body too large (%d>%d), cut",bodylen,MAXBODYLEN);
		bodylen=MAXBODYLEN;
		}
	*d=bodylen;
	assert(d<pdu+sizeof(pdu));
	while (bodylen || inb) {
		if (!inb) {
			assert(bodylen>0); assert(!!*body);
			inreg=charconv(*body++,offs++);
			bodylen--;
			inb=7;
			}
		if (!outb) {
			*++d=0x00;
			outb=8;
			}
		xb=MIN(inb,outb);
		d4("inb=%d,outb=%d,xb=%d\n",inb,outb,xb);
		*d|=((inreg>>(unsigned)(7-inb))&((1<<xb)-1))<<(unsigned)(8-outb);
		inb-=xb; outb-=xb;
		}
	d++;
	assert(d<pdu+sizeof(pdu));
	pdudata=malloc(2*(d-pdu)+1);
	textconv(pdudata,pdu,d-pdu);
}

static struct {
	char **sp;
	long *ip;
	const char *const msg;
	} numarg[]={
		{ &maxretry,&maxretryn,"maxretry" },
		{ &readtime,&readtimen,"readtime" },
		{ &chartime,&chartimen,"chartime" },
		{ &cmdtime ,&cmdtimen ,"cmdtime"  },
	};

int main(int argc,char **argv)
{
char *s,*finame;
FILE *fin;
int i;
unsigned fatal=0;

	if ((s=strrchr((pname=*argv),'/'))) pname=s+1;
	atexit(cleanup);
	signal(SIGTERM,(RETSIGTYPE (*)(int))cleanup);
	signal(SIGQUIT,(RETSIGTYPE (*)(int))cleanup);
	signal(SIGINT ,(RETSIGTYPE (*)(int))cleanup);
	signal(SIGHUP ,(RETSIGTYPE (*)(int))cleanup);
	processargs(argc,argv,"<command-line>");
	if ((s=getenv("HOME"))) {
size_t l=strlen(s);
char *buf=malloc(l+50);

		memcpy(buf,s,l);
		strcpy(buf+l,CONFIG_HOME);
		readfile(buf,1);
		free(buf);
		}
	readfile(CONFIG_MAIN,1);

	for (i=0;i<NELEM(nullcheck);i++)
		if (!*nullcheck[i].var) {
			error("Missing parameter \"%s\"",nullcheck[i].name);
			fatal++;
			}
	if (fatal) error("!Previous error%s considered unrecoverable",(fatal==1?"":"s"));
	for (i=0;i<NELEM(emptycheck);i++)
		if (*emptycheck[i] && !**emptycheck[i]) {
			free(*emptycheck[i]);
			     *emptycheck[i]=NULL;
			}
	if (!logname) logname=DEF_LOGNAME;
	if (!lockfile) lockfile=DEF_LOCKFILE;
	if (!device) device=DEF_DEVICE;
	if (body && readbody) {
		finame=body;
		body=NULL;
		}
	else fin=stdin;
	if (!body) {
		readbody=0;
		if (verbose>=1)
			error("\nPlease enter the SMS text body, end with EOF (ctrl-D):");
		chk(body=malloc(BODYLOAD));
		bodylen=fread(body,1,BODYLOAD,fin);
		if (bodylen==-1)
			error("!Error reading stream \"%s\": %m",(finame?finame:"<stdin>"));
		}
	if (fin!=stdin) {
		chkfclose(fin,finame);
		free(finame);
		}

	for (i=0;i<NELEM(numarg);i++) {
char *serr;
		if (!*numarg[i].sp) continue;
		*numarg[i].ip=strtol(*numarg[i].sp,&serr,0);
		if (*numarg[i].ip<0 || *numarg[i].ip>=LONG_MAX || !serr || *serr)
			error("!Number parse error for parameter \"%s\" of \"%s\" at: %s",
				numarg[i].msg,*numarg[i].sp,serr);
		}

	if (!strchr(device,'/')) {
size_t l=strlen(device);
		chk(s=malloc(5+l+1));
		strcpy(s,"/dev/");
		strcpy(s+5,device);
		free(device);
		device=s;
		}
	devicename=strrchr(device,'/')+1; assert(!!(devicename-1));
	for (i=0,s=lockfile;*s;s++) {
		if (*s!='%') continue;
		s++;
		if (*s=='%') continue;
		if (*s=='s') {
			if (i) error("!Only one \"%%s\" permitted in lockfile format-string");
			i=1; continue;
			}
		error("!Invalid format-character '%c' in lockfile format-string, only \"%%s\" allowed",*s);
		}
	
	if (*logname) {
		if (!(logf=fopen(logname,"a")))
			error("!Error opening log \"%s\" for append: %m",logname);
		logmsg("Starting up: " PACKAGE " " VERSION);
		}
	genpdu();
		
	if (lockfile && *lockfile && VARPRINTF(lockreal,lockfile,devicename)>0) {
time_t start,end;
		if (verbose>=1) error(".Locking device \"%s\" by \"%s\"..",device,lockreal);
		time(&start);
		lockdevice();
		time(&end);
		if ((end-=start)>LOCKREPORT)
			logmsg("Device lock succeeded after %d seconds",end);
		}
	if (verbose>=1) error(".Opening device \"%s\"..",device);
	if ((devfd=open(device,O_RDWR|O_NDELAY))<0)
		error("!Cannot open device \"%s\" for rw-access: %m",device);
	
	if (tcgetattr(devfd,&restios))
		error("Unable to get termios settings: %m");
	else {
		restios.c_cflag=(restios.c_cflag&~(CBAUD|CBAUDEX))|B0|HUPCL;
		restios_yes=1;
		}
	tios.c_iflag=IGNBRK|IGNPAR|IXON|IXOFF;
	tios.c_oflag=0;
	tios.c_cflag=CS8|CREAD|CLOCAL|B19200|HUPCL;
	tios.c_lflag=IEXTEN|NOFLSH;
	memset(tios.c_cc,_POSIX_VDISABLE,sizeof(tios.c_cc));
	tios.c_cc[VTIME]=0;
	tios.c_cc[VMIN ]=1;
	    cfsetispeed(&tios,B19200);
	if (cfsetospeed(&tios,B19200)|cfsetispeed(&tios,B19200))
		error("Error setting termios baudrate on device: %m");
	if (tcflush(devfd,TCIOFLUSH))
		error("Error flushing termios (TCIOFLUSH) on device: %m");
	if (tcsetattr(devfd,TCSANOW,&tios))
		error("!Unable to set initial termios device settings: %m");

	signal(SIGALRM,(RETSIGTYPE (*)(int))sigalarm);
	do {
		devcmd("",NULL,"\r\nAT\032");
		devcmd(NULL,NULL,"\r\nAT");
		smscset();
		devcmd(NULL,NULL,"\r\nAT+CMGF=0");
		devcmd("\n> ",NULL,"\r\nAT+CMGS=%d",(strlen(pdusmsc)+strlen(pdudata))/2);
		if (!(s=devcmd(NULL,"\n+CMGS:","!%s%s\032",pdusmsc,pdudata))) retrying();
		} while (!s);
	while (isspace(*s)) s++;
	if (verbose>=1) error("\nMessage successfuly sent with MR: %s",s);
	devcmd(NULL,NULL,"\r\nAT");

	logmsg("SMS sent (after %d retries), message reference: %s",retrycnt,s);
	return(EXIT_SUCCESS);
}