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