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#include "stddef.h"
#include "sys/types.h"
#include <unistd.h>
#include "stdio.h"
#include "stdio/_stdio.h"
#include "string.h"
char * ctermid(char * s)
{
/* TODO: return the empty string if there is no controlling terminal */
if (s == NULL) {
s = __stdio.ctermid;
} else {
strcpy(s, __stdio.ctermid);
}
return s;
}
/*
POSIX(1)
*/
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