tmpnam.c - scc - simple c99 compiler
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       ---
       tmpnam.c (403B)
       ---
            1 #include <sys.h>
            2 
            3 #include <stdio.h>
            4 #include <string.h>
            5 
            6 #include "../syscall.h"
            7 
            8 #undef tmpnam
            9 
           10 char *
           11 tmpnam(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 }