mirror of git://sourceware.org/git/glibc.git
108 lines
3.6 KiB
C
108 lines
3.6 KiB
C
/* Test getdelim conforming to POSIX specifications.
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Note: Most getdelim use cases are covered by stdio-common/tst-getline.
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Copyright (C) 2023-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/test-driver.h>
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#include <support/xstdio.h>
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#include <support/temp_file.h>
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static int
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do_test (void)
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{
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/* Check that getdelim sets error indicator on error (BZ #29917) */
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clearerr (stdin);
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TEST_VERIFY (getdelim (0, 0, '\n', stdin) == -1);
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TEST_VERIFY (ferror (stdin) != 0);
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TEST_VERIFY (errno == EINVAL);
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/* Test getdelim with NUL as delimiter */
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verbose_printf ("Testing NUL delimiter\n");
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char *lineptr = NULL;
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size_t linelen = 0;
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char membuf[] = "abc\0d\nef\0";
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FILE *memstream = xfmemopen (membuf, sizeof (membuf), "r");
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TEST_VERIFY (getdelim (&lineptr, &linelen, '\0', memstream) != -1);
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TEST_COMPARE_BLOB (lineptr, 4, "abc\0", 4);
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TEST_VERIFY (getdelim (&lineptr, &linelen, '\0', memstream) != -1);
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TEST_COMPARE_BLOB (lineptr, 5, "d\nef\0", 5);
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xfclose (memstream);
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free (lineptr);
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/* Test that we null-terminate the buffer upon allocating it (BZ #28038). */
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lineptr = NULL;
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linelen = 0;
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char *file_name;
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TEST_VERIFY_EXIT (create_temp_file ("tst-getdelim.", &file_name) != -1);
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FILE *fp = fopen (file_name, "w+");
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free (file_name);
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TEST_VERIFY_EXIT (fp != NULL);
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TEST_VERIFY (getdelim (&lineptr, &linelen, '\n', fp) == -1);
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TEST_VERIFY (feof (fp));
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TEST_VERIFY (linelen > 0);
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TEST_VERIFY (lineptr[0] == '\0');
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free (lineptr);
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/* Test that we can read until -1 is returned and then access the last line
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of the file. This behavior was broken by commit
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33eff78c8b28adc4963987880e10d96761f2a167 and later fixed. */
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lineptr = NULL;
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linelen = 0;
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char input[] = "a\nb\nc\n";
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TEST_VERIFY_EXIT (fwrite (input, 1, sizeof input - 1, fp)
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== sizeof input - 1);
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TEST_VERIFY_EXIT (fseeko (fp, 0, SEEK_SET) == 0);
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char expect[] = { 'a' - 1, '\n', '\0' };
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for (int i = 0; i < 3; ++i)
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{
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++expect[0];
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TEST_VERIFY (getdelim (&lineptr, &linelen, '\n', fp) == 2);
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TEST_VERIFY (linelen > 2);
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TEST_VERIFY (strcmp (lineptr, expect) == 0);
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}
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TEST_VERIFY (getdelim (&lineptr, &linelen, '\n', fp) == -1);
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TEST_VERIFY (feof (fp));
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TEST_VERIFY (linelen > 2);
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TEST_VERIFY (strcmp (lineptr, expect) == 0);
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/* Test the same thing without a newline. */
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TEST_VERIFY_EXIT (fwrite ("d", 1, 1, fp) == 1);
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TEST_VERIFY_EXIT (fseeko (fp, -1, SEEK_CUR) == 0);
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TEST_VERIFY (getdelim (&lineptr, &linelen, '\n', fp) == 1);
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TEST_VERIFY (linelen > 2);
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TEST_VERIFY (strcmp (lineptr, "d") == 0);
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TEST_VERIFY (getdelim (&lineptr, &linelen, '\n', fp) == -1);
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TEST_VERIFY (feof (fp));
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TEST_VERIFY (linelen > 2);
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TEST_VERIFY (strcmp (lineptr, "d") == 0);
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fclose (fp);
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free (lineptr);
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return 0;
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}
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#include <support/test-driver.c>
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