unistd: Improve fortify with clang
[glibc.git] / support / xgetline.c
blobad828a9afcf4a5c8e58e7e6832f64813179dd62a
1 /* fopen with error checking.
2 Copyright (C) 2020-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
19 #include <support/xstdio.h>
20 #include <support/check.h>
22 size_t
23 xgetline (char **lineptr, size_t *n, FILE *stream)
25 TEST_VERIFY (!ferror (stream));
26 ssize_t ret = getline (lineptr, n, stream);
27 if (ferror (stream))
29 TEST_VERIFY (ret < 0);
30 FAIL_EXIT1 ("getline: %m");
32 if (feof (stream))
34 TEST_VERIFY (ret <= 0);
35 return 0;
37 TEST_VERIFY (ret > 0);
38 return ret;