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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/limits.h>
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char *
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getlogin_r(char *buf, int len)
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{
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	int f, n;
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	f = open("/dev/user", O_RDONLY);
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	if(f < 0)
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		return 0;
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	n = read(f, buf, len);
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	buf[len-1] = 0;
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	close(f);
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	return (n>=0)? buf : 0;
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}
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char *
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getlogin(void)
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{
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	static char buf[NAME_MAX+1];
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	return getlogin_r(buf, sizeof buf);
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}