support/xgetline.c

   1 /* fopen with error checking.
   2    Copyright (C) 2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <support/xstdio.h>
  20 #include <support/check.h>
  21 #include <errno.h>
  22
  23 ssize_t
  24 xgetline (char **lineptr, size_t *n, FILE *stream)
  25 {
  26   int old_errno = errno;
  27   errno = 0;
  28   size_t ret = getline (lineptr, n, stream);
  29   if (!feof (stream) && ferror (stream))
  30     FAIL_EXIT1 ("getline failed: %m");
  31   errno = old_errno;
  32   return ret;
  33 }