text: #include <stdio.h>
  #include <fcntl.h>
  #include <errno.h>
  #include <sys/stat.h>
  #include <string.h>
  #include "syscall.h"
  
  #define MAXTRIES 100
  
  char *__randname(char *);
  
  char *tmpnam(char *buf)
  {
  	static char internal[L_tmpnam];
  	char s[] = "/tmp/tmpnam_XXXXXX";
  	int try;
  	int r;
  	for (try=0; try<MAXTRIES; try++) {
  		__randname(s+12);
  #ifdef SYS_lstat
  		r = __syscall(SYS_lstat, s, &(struct stat){0});
  #else
  		r = __syscall(SYS_fstatat, AT_FDCWD, s,
  			&(struct stat){0}, AT_SYMLINK_NOFOLLOW);
  #endif
  		if (r == -ENOENT) return strcpy(buf ? buf : internal, s);
  	}
  	return 0;
  }
  