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Add support/ code for checking file contents

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For use in freopen tests, add various support/ helper interfaces for
use in checking file contents.

Tested for x86_64.
This commit is contained in:
Joseph Myers 2024-09-03 13:53:01 +00:00
parent 1927f718fc
commit 96d0bf98ca
6 changed files with 202 additions and 0 deletions
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4
support/Makefile
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@ -49,6 +49,8 @@ libsupport-routines = \
support_check_stat_fd \
support_check_stat_path \
support_chroot \
support_compare_file_bytes \
support_compare_file_string \
support_copy_file \
support_copy_file_range \
support_create_timer \
@ -65,6 +67,8 @@ libsupport-routines = \
support_isolate_in_subprocess \
support_mutex_pi_monotonic \
support_need_proc \
support_open_and_compare_file_bytes \
support_open_and_compare_file_string \
support_openpty \
support_path_support_time64 \
support_paths \

63
support/file_contents.h Normal file
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@ -0,0 +1,63 @@
/* Functionality for checking file contents.
Copyright (C) 2024 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/>. */
#ifndef SUPPORT_FILE_CONTENTS_H
#define SUPPORT_FILE_CONTENTS_H
#include <support/check.h>
#include <stdio.h>
__BEGIN_DECLS
/* Check that an already-open file has exactly the given bytes,
starting at the current location in the file. The file position
indicator is updated to point after the bytes compared. Return 0
if equal, 1 otherwise or on read error. */
int support_compare_file_bytes (FILE *fp, const char *contents, size_t length);
/* Check that an already-open file has exactly the given string as
contents, starting at the current offset. The file position
indicator is updated to point after the bytes compared. Return 0
if equal, 1 otherwise or on read error. */
int support_compare_file_string (FILE *fp, const char *contents);
/* Check that a not-currently-open file has exactly the given bytes.
Return 0 if equal, 1 otherwise or on read error. */
int support_open_and_compare_file_bytes (const char *file,
const char *contents,
size_t length);
/* Check that a not-currently-open file has exactly the given string
as contents, starting at the current offset. Return 0 if equal, 1
otherwise or on read error. */
int support_open_and_compare_file_string (const char *file,
const char *contents);
/* Compare bytes read from an open file with the given string. The
file position indicator is updated to point after the bytes
compared. */
#define TEST_COMPARE_FILE_STRING(FP, CONTENTS) \
TEST_COMPARE (support_compare_file_string (FP, CONTENTS), 0)
/* Read a file and compare bytes read from it with the given string. */
#define TEST_OPEN_AND_COMPARE_FILE_STRING(FILE, CONTENTS) \
TEST_COMPARE (support_open_and_compare_file_string (FILE, CONTENTS), 0)
__END_DECLS
#endif /* SUPPORT_FILE_CONTENTS_H */

42
support/support_compare_file_bytes.c Normal file
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@ -0,0 +1,42 @@
/* Compare bytes from an open file.
Copyright (C) 2024 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 <stdio.h>
#include <support/file_contents.h>
/* Check that an already-open file has exactly the given bytes,
starting at the current offset. */
int
support_compare_file_bytes (FILE *fp, const char *contents, size_t length)
{
int c;
while (length > 0)
{
c = getc (fp);
if (c == EOF || (unsigned char) c != (unsigned char) contents[0])
return 1;
contents++;
length--;
}
c = getc (fp);
if (c != EOF || ferror (fp))
return 1;
return 0;
}

28
support/support_compare_file_string.c Normal file
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@ -0,0 +1,28 @@
/* Compare string from an open file.
Copyright (C) 2024 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 <stdio.h>
#include <string.h>
#include <support/file_contents.h>
int
support_compare_file_string (FILE *fp, const char *contents)
{
return support_compare_file_bytes (fp, contents, strlen (contents));
}

33
support/support_open_and_compare_file_bytes.c Normal file
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@ -0,0 +1,33 @@
/* Compare bytes from a file.
Copyright (C) 2024 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/file_contents.h>
#include <support/xstdio.h>
/* Check that a not-currently-open file has exactly the given
bytes. */
int
support_open_and_compare_file_bytes (const char *file, const char *contents,
size_t length)
{
FILE *fp = xfopen (file, "r");
int ret = support_compare_file_bytes (fp, contents, length);
xfclose (fp);
return ret;
}

32
support/support_open_and_compare_file_string.c Normal file
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@ -0,0 +1,32 @@
/* Compare string from a file.
Copyright (C) 2024 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 <string.h>
#include <support/file_contents.h>
#include <support/xstdio.h>
/* Check that a not-currently-open file has exactly the given string
as contents, starting at the current offset. */
int
support_open_and_compare_file_string (const char *file, const char *contents)
{
return support_open_and_compare_file_bytes (file, contents,
strlen (contents));
}