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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdio.h>
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char*
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mktemp(char *template)
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{
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	int n;
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	long x;
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	char *p;
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	int c;
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	struct stat stbuf;
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	n = strlen(template);
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	p = template+n-6;
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	if (n < 6 || strcmp(p, "XXXXXX") != 0) {
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		*template = 0;
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	} else {
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		x = getpid() % 100000;
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		sprintf(p, "%05d", x);
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		p += 5;
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		for(c = 'a'; c <= 'z'; c++) {
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			*p = c;
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			if (stat(template, &stbuf) < 0)
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				return template;
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		}
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		*template = 0;
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	}
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	return template;
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}