lib/dprintf.c

   1 /* Formatted output to a file descriptor.
   2    Copyright (C) 2009-2025 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation, either version 3 of the
   7    License, or (at your option) any later version.
   8
   9    This file is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #ifdef HAVE_CONFIG_H
  18 # include <config.h>
  19 #endif
  20
  21 /* Specification.  */
  22 #include <stdio.h>
  23
  24 #include <errno.h>
  25 #include <limits.h>
  26 #include <stdarg.h>
  27
  28 #include "intprops.h"
  29
  30 int
  31 dprintf (int fd, const char *format, ...)
  32 {
  33   va_list args;
  34   off64_t ret;
  35
  36   va_start (args, format);
  37   ret = vdzprintf (fd, format, args);
  38   va_end (args);
  39
  40   if (TYPE_MAXIMUM (off64_t) > INT_MAX && ret > INT_MAX)
  41     {
  42       errno = EOVERFLOW;
  43       return -1;
  44     }
  45
  46   return ret;
  47 }