scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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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 }