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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include "modem.h"
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int vflag;
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void
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verbose(char *fmt, ...)
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{
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	va_list arg;
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	char buf[512];
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	if(vflag){
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		va_start(arg, fmt);
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		vseprint(buf, buf+sizeof(buf), fmt, arg);
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		va_end(arg);
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		syslog(0, "fax", buf);
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	}
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}
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void
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error(char *fmt, ...)
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{
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	va_list arg;
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	char buf[512];
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	int n;
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	n = sprint(buf, "%s: ", argv0);
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	va_start(arg, fmt);
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	vseprint(buf+n, buf+sizeof(buf)-n, fmt, arg);
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	va_end(arg);
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	fprint(2, buf);
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	if(vflag)
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		print(buf+n);
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	exits("error");
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}
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static char *errors[] = {
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	[Eok]		"no error",
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	[Eattn]		"can't get modem's attention",
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	[Enoanswer]	"Retry, no answer or busy",
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	[Enoresponse]	"Retry, no response from modem",
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	[Eincompatible]	"Retry, incompatible",
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	[Esys]		"Retry, system call error",
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	[Eproto]	"Retry, fax protocol botch",
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};
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int
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seterror(Modem *m, int error)
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{
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	if(error == Esys)
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		sprint(m->error, "%s: %r", errors[Esys]);
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	else
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		strcpy(m->error, errors[error]);
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	verbose("seterror: %s", m->error);
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	return error;
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}
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void
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faxrlog(Modem *m, int ok)
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{
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	char buf[1024];
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	int n;
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	n = sprint(buf, "receive %lud %c %d", m->time, ok == Eok ? 'Y': 'N', m->pageno-1);
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	if(ok == Eok && (m->valid & Vftsi))
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		sprint(buf+n, " %s", m->ftsi);
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	syslog(0, "fax", buf);
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}