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Add support/ code for checking file contents
For use in freopen tests, add various support/ helper interfaces for use in checking file contents. Tested for x86_64.
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@ -49,6 +49,8 @@ libsupport-routines = \
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support_check_stat_fd \
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support_check_stat_path \
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support_chroot \
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support_compare_file_bytes \
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support_compare_file_string \
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support_copy_file \
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support_copy_file_range \
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support_create_timer \
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@ -65,6 +67,8 @@ libsupport-routines = \
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support_isolate_in_subprocess \
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support_mutex_pi_monotonic \
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support_need_proc \
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support_open_and_compare_file_bytes \
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support_open_and_compare_file_string \
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support_openpty \
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support_path_support_time64 \
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support_paths \
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63
support/file_contents.h
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63
support/file_contents.h
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@ -0,0 +1,63 @@
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/* Functionality for checking file contents.
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Copyright (C) 2024 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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#ifndef SUPPORT_FILE_CONTENTS_H
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#define SUPPORT_FILE_CONTENTS_H
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#include <support/check.h>
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#include <stdio.h>
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__BEGIN_DECLS
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/* Check that an already-open file has exactly the given bytes,
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starting at the current location in the file. The file position
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indicator is updated to point after the bytes compared. Return 0
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if equal, 1 otherwise or on read error. */
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int support_compare_file_bytes (FILE *fp, const char *contents, size_t length);
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/* Check that an already-open file has exactly the given string as
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contents, starting at the current offset. The file position
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indicator is updated to point after the bytes compared. Return 0
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if equal, 1 otherwise or on read error. */
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int support_compare_file_string (FILE *fp, const char *contents);
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/* Check that a not-currently-open file has exactly the given bytes.
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Return 0 if equal, 1 otherwise or on read error. */
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int support_open_and_compare_file_bytes (const char *file,
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const char *contents,
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size_t length);
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/* Check that a not-currently-open file has exactly the given string
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as contents, starting at the current offset. Return 0 if equal, 1
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otherwise or on read error. */
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int support_open_and_compare_file_string (const char *file,
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const char *contents);
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/* Compare bytes read from an open file with the given string. The
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file position indicator is updated to point after the bytes
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compared. */
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#define TEST_COMPARE_FILE_STRING(FP, CONTENTS) \
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TEST_COMPARE (support_compare_file_string (FP, CONTENTS), 0)
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/* Read a file and compare bytes read from it with the given string. */
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#define TEST_OPEN_AND_COMPARE_FILE_STRING(FILE, CONTENTS) \
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TEST_COMPARE (support_open_and_compare_file_string (FILE, CONTENTS), 0)
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__END_DECLS
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#endif /* SUPPORT_FILE_CONTENTS_H */
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42
support/support_compare_file_bytes.c
Normal file
42
support/support_compare_file_bytes.c
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@ -0,0 +1,42 @@
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/* Compare bytes from an open file.
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Copyright (C) 2024 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 <support/file_contents.h>
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/* Check that an already-open file has exactly the given bytes,
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starting at the current offset. */
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int
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support_compare_file_bytes (FILE *fp, const char *contents, size_t length)
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{
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int c;
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while (length > 0)
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{
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c = getc (fp);
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if (c == EOF || (unsigned char) c != (unsigned char) contents[0])
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return 1;
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contents++;
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length--;
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}
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c = getc (fp);
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if (c != EOF || ferror (fp))
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return 1;
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return 0;
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}
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28
support/support_compare_file_string.c
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28
support/support_compare_file_string.c
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@ -0,0 +1,28 @@
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/* Compare string from an open file.
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Copyright (C) 2024 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 <string.h>
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#include <support/file_contents.h>
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int
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support_compare_file_string (FILE *fp, const char *contents)
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{
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return support_compare_file_bytes (fp, contents, strlen (contents));
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}
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33
support/support_open_and_compare_file_bytes.c
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33
support/support_open_and_compare_file_bytes.c
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@ -0,0 +1,33 @@
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/* Compare bytes from a file.
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Copyright (C) 2024 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 <support/file_contents.h>
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#include <support/xstdio.h>
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/* Check that a not-currently-open file has exactly the given
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bytes. */
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int
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support_open_and_compare_file_bytes (const char *file, const char *contents,
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size_t length)
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{
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FILE *fp = xfopen (file, "r");
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int ret = support_compare_file_bytes (fp, contents, length);
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xfclose (fp);
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return ret;
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}
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32
support/support_open_and_compare_file_string.c
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32
support/support_open_and_compare_file_string.c
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@ -0,0 +1,32 @@
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/* Compare string from a file.
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Copyright (C) 2024 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 <string.h>
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#include <support/file_contents.h>
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#include <support/xstdio.h>
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/* Check that a not-currently-open file has exactly the given string
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as contents, starting at the current offset. */
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int
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support_open_and_compare_file_string (const char *file, const char *contents)
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{
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return support_open_and_compare_file_bytes (file, contents,
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strlen (contents));
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}
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