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All the accesses to files outside our build or source directories are now identified and appended into a file for later processing. The location of the file that contains all the records can be controlled via VIR_TEST_FILE_ACCESS env variable and defaults to abs_builddir "/test_file_access.txt". The script that will process the access file is to be added in next commit. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
227 lines
5.1 KiB
C
227 lines
5.1 KiB
C
/*
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* Copyright (C) 2016 Red Hat, Inc.
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*
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* This 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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*
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* This 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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Michal Privoznik <mprivozn@redhat.com>
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*/
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#include <config.h>
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#include "virmock.h"
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#include <unistd.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <execinfo.h>
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#include <sys/file.h>
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#include "internal.h"
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#include "configmake.h"
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#include "virstring.h"
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#include "viralloc.h"
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#include "virfile.h"
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static int (*real_open)(const char *path, int flags, ...);
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static FILE *(*real_fopen)(const char *path, const char *mode);
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static int (*real_access)(const char *path, int mode);
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static int (*real_stat)(const char *path, struct stat *sb);
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static int (*real___xstat)(int ver, const char *path, struct stat *sb);
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static int (*real_lstat)(const char *path, struct stat *sb);
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static int (*real___lxstat)(int ver, const char *path, struct stat *sb);
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static const char *progname;
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const char *output;
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#define VIR_FILE_ACCESS_DEFAULT abs_builddir "/test_file_access.txt"
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static void init_syms(void)
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{
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if (real_open)
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return;
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VIR_MOCK_REAL_INIT(open);
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VIR_MOCK_REAL_INIT(fopen);
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VIR_MOCK_REAL_INIT(access);
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VIR_MOCK_REAL_INIT_ALT(stat, __xstat);
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VIR_MOCK_REAL_INIT_ALT(lstat, __lxstat);
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}
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static void
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printFile(const char *file)
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{
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FILE *fp;
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const char *testname = getenv("VIR_TEST_MOCK_TESTNAME");
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if (!progname) {
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progname = getenv("VIR_TEST_MOCK_PROGNAME");
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if (!progname)
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return;
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output = getenv("VIR_TEST_FILE_ACCESS_OUTPUT");
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if (!output)
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output = VIR_FILE_ACCESS_DEFAULT;
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}
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if (!(fp = real_fopen(output, "a"))) {
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fprintf(stderr, "Unable to open %s: %s\n", output, strerror(errno));
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abort();
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}
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if (flock(fileno(fp), LOCK_EX) < 0) {
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fprintf(stderr, "Unable to lock %s: %s\n", output, strerror(errno));
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fclose(fp);
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abort();
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}
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/* Now append the following line into the output file:
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* $file: $progname $testname */
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fprintf(fp, "%s: %s", file, progname);
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if (testname)
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fprintf(fp, ": %s", testname);
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fputc('\n', fp);
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flock(fileno(fp), LOCK_UN);
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fclose(fp);
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}
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static void
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checkPath(const char *path)
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{
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char *fullPath = NULL;
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char *relPath = NULL;
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char *crippledPath = NULL;
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if (path[0] != '/' &&
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virAsprintfQuiet(&relPath, "./%s", path) < 0)
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goto error;
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/* Le sigh. Both canonicalize_file_name() and realpath()
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* expect @path to exist otherwise they return an error. So
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* if we are called over an non-existent file, this could
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* return an error. In that case do our best and hope we will
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* catch possible error. */
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if ((fullPath = canonicalize_file_name(relPath ? relPath : path))) {
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path = fullPath;
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} else {
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/* Yeah, our worst nightmares just became true. Path does
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* not exist. Cut off the last component and retry. */
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if (VIR_STRDUP_QUIET(crippledPath, relPath ? relPath : path) < 0)
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goto error;
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virFileRemoveLastComponent(crippledPath);
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if ((fullPath = canonicalize_file_name(crippledPath)))
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path = fullPath;
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}
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if (!STRPREFIX(path, abs_topsrcdir) &&
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!STRPREFIX(path, abs_topbuilddir)) {
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printFile(path);
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}
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VIR_FREE(crippledPath);
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VIR_FREE(relPath);
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VIR_FREE(fullPath);
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return;
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error:
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fprintf(stderr, "Out of memory\n");
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abort();
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}
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int open(const char *path, int flags, ...)
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{
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int ret;
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init_syms();
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checkPath(path);
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if (flags & O_CREAT) {
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va_list ap;
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mode_t mode;
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va_start(ap, flags);
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mode = va_arg(ap, mode_t);
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va_end(ap);
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ret = real_open(path, flags, mode);
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} else {
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ret = real_open(path, flags);
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}
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return ret;
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}
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FILE *fopen(const char *path, const char *mode)
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{
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init_syms();
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checkPath(path);
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return real_fopen(path, mode);
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}
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int access(const char *path, int mode)
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{
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init_syms();
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checkPath(path);
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return real_access(path, mode);
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}
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int stat(const char *path, struct stat *sb)
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{
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init_syms();
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checkPath(path);
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return VIR_MOCK_CALL_STAT(_STAT_VER, path, sb);
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}
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int
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__xstat(int ver, const char *path, struct stat *sb)
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{
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init_syms();
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checkPath(path);
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return VIR_MOCK_CALL_STAT(ver, path, sb);
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}
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int
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lstat(const char *path, struct stat *sb)
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{
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init_syms();
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checkPath(path);
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return VIR_MOCK_CALL_LSTAT(_STAT_VER, path, sb);
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}
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int
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__lxstat(int ver, const char *path, struct stat *sb)
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{
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init_syms();
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checkPath(path);
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return VIR_MOCK_CALL_LSTAT(ver, path, sb);
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}
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