1  #define NULL ((void*)0)
       2  typedef __SIZE_TYPE__ size_t;
       3  
       4  extern int errno;
       5  
       6  extern void free (void *);
       7  char *strdup (const char *)
       8    __attribute__((malloc (free)));
       9  
      10  extern size_t strlen (const char *__s)
      11    __attribute__ ((__nothrow__ , __leaf__))
      12    __attribute__ ((__pure__))
      13    __attribute__ ((__nonnull__ (1)));
      14  
      15  extern void error (int __status, int __errnum, const char *__format, ...)
      16       __attribute__ ((__format__ (__printf__, 3, 4)));
      17  
      18  extern void error_at_line (int __status, int __errnum, const char *__fname,
      19  			   unsigned int __lineno, const char *__format, ...)
      20       __attribute__ ((__format__ (__printf__, 5, 6)));
      21  
      22  /* PR analyzer/99196; extract taken from
      23       https://github.com/libguestfs/libguestfs/blob/f19fd566f6387ce7e4d82409528c9dde374d25e0/daemon/tar.c#L108
      24     (which is GPLv2 or later).  */
      25  
      26  extern char *read_whole_file (const char *error_file, size_t *out);
      27  
      28  #define EXIT_FAILURE 1
      29  
      30  char *read_error_file (const char *error_file)
      31  {
      32    size_t len;
      33    char *str;
      34  
      35    str = read_whole_file (error_file, &len);
      36    if (str == NULL) {
      37      str = strdup ("(no error)");
      38      if (str == NULL)
      39        error (EXIT_FAILURE, errno, "strdup");
      40      len = strlen (str); /* { dg-bogus "NULL" } */
      41    }
      42  
      43    /* Remove trailing \n character if any. */
      44    if (len > 0 && str[len-1] == '\n')
      45      str[--len] = '\0';
      46  
      47    return str;                   /* caller frees */
      48  }