support/xgetline.c


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/* fopen with error checking.
   Copyright (C) 2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <support/xstdio.h>
#include <support/check.h>
#include <errno.h>

ssize_t
xgetline (char **lineptr, size_t *n, FILE *stream)
{
  int old_errno = errno;
  errno = 0;
  size_t ret = getline (lineptr, n, stream);
  if (!feof (stream) && ferror (stream))
    FAIL_EXIT1 ("getline failed: %m");
  errno = old_errno;
  return ret;
}