scc

 1#include <sys.h>
 2
 3#include <stdio.h>
 4#include <string.h>
 5
 6#include "../syscall.h"
 7
 8#undef tmpnam
 9
10char *
11tmpnam(char *s)
12{
13	static char tmpl[] = _TMPNAME;
14	char *p, *beg;
15
16
17	for (beg = tmpl; *beg < '0' || *beg > '9'; ++beg)
18			;
19
20	do {
21		for (p = beg; *p == '9'; *p++ = '0')
22			;
23		if (*p == '\0')
24			return NULL;
25		++*p;
26	} while (_access(tmpl, F_OK) == 0);
27
28	if (s)
29		strcpy(s, tmpl);
30	return tmpl;
31}