libc/stdio: Fix tmpnam() - scc - simple c99 compiler
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       ---
   DIR commit d681ea0ce2e1903f5047140fb3bcb6da1dc0e673
   DIR parent 6c5c5ab6a9adc01a81abbc1cc6e2b26d0b9a53fb
  HTML Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
       Date:   Tue, 12 May 2026 12:15:06 +0200
       
       libc/stdio: Fix tmpnam()
       
       The logic to find the digits to increment was wrong and
       it returned FALSE always.
       
       Diffstat:
         M src/libc/stdio/tmpnam.c             |      14 ++++++++------
       
       1 file changed, 8 insertions(+), 6 deletions(-)
       ---
   DIR diff --git a/src/libc/stdio/tmpnam.c b/src/libc/stdio/tmpnam.c
       @@ -11,18 +11,20 @@ char *
        tmpnam(char *s)
        {
                static char tmpl[] = _TMPNAME;
       -        char *p;
       +        char *p, *beg;
        
       -        for (;;) {
       -                for (p = tmpl; *p && *p != '9'; ++p)
       +
       +        for (beg = tmpl; *beg < '0' || *beg > '9'; ++beg)
       +                        ;
       +
       +        do {
       +                for (p = beg; *p == '9'; *p++ = '0')
                                ;
                        if (*p == '\0')
                                return NULL;
                        ++*p;
       +        } while (_access(tmpl, F_OK) == 0);
        
       -                if (_access(tmpl, F_OK) != 0)
       -                        break;
       -        }
                if (s)
                        strcpy(s, tmpl);
                return tmpl;