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#define _XOPEN_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
int fd;
char *cp;
fd=open("/dev/ptmx",O_NOCTTY|O_RDWR);
cp=ptsname(fd);
if (cp==NULL)
return EXIT_FAILURE;
printf("ptsname %s\n",cp);
return EXIT_SUCCESS;
}
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