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According to the official documentation for autoconf[1], the correct names for these variables are abs_top_{src,build}dir rather than abs_top{src,build}dir; in fact, we're already using the correct names in various places, so let's just make everything nice and consistent. [1] https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Preset-Output-Variables.html Signed-off-by: Andrea Bolognani <abologna@redhat.com> Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
349 lines
8.3 KiB
C
349 lines
8.3 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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#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 <sys/stat.h>
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#include <sys/socket.h>
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#ifdef HAVE_SYS_UN_H
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# include <sys/un.h>
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#endif
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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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/* stat can be a macro as follows:
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*
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* #define stat stat64
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*
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* This wouldn't fly with our mock. Make sure that the macro (and
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* all its friends) are undefined. We don't want anybody mangling
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* our code. */
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#undef stat
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#undef stat64
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#undef __xstat
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#undef __xstat64
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#undef lstat
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#undef lstat64
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#undef __lxstat
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#undef __lxstat64
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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_stat64)(const char *path, void *sb);
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static int (*real___xstat)(int ver, const char *path, struct stat *sb);
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static int (*real___xstat64)(int ver, const char *path, void *sb);
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static int (*real_lstat)(const char *path, struct stat *sb);
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static int (*real_lstat64)(const char *path, void *sb);
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static int (*real___lxstat)(int ver, const char *path, struct stat *sb);
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static int (*real___lxstat64)(int ver, const char *path, void *sb);
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static int (*real_connect)(int fd, const struct sockaddr *addr, socklen_t addrlen);
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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(stat64, __xstat64);
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VIR_MOCK_REAL_INIT_ALT(lstat, __lxstat);
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VIR_MOCK_REAL_INIT_ALT(lstat64, __lxstat64);
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VIR_MOCK_REAL_INIT(connect);
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}
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static void
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printFile(const char *file,
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const char *func)
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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: $func: $testname */
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fprintf(fp, "%s: %s: %s", file, func, 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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#define CHECK_PATH(path) \
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checkPath(path, __FUNCTION__)
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static void
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checkPath(const char *path,
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const char *func)
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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. virFileCanonicalizePath() expects @path to exist, otherwise
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* it will return an error. So if we are called over an non-existent
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* file, this could return an error. In that case do our best and hope
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* we will catch possible errors. */
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if ((fullPath = virFileCanonicalizePath(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 = virFileCanonicalizePath(crippledPath)))
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path = fullPath;
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}
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if (!STRPREFIX(path, abs_top_srcdir) &&
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!STRPREFIX(path, abs_top_builddir)) {
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printFile(path, func);
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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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CHECK_PATH(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 = (mode_t) va_arg(ap, int);
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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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CHECK_PATH(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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CHECK_PATH(path);
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return real_access(path, mode);
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}
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/* Okay, the following ifdef rain forest may look messy at a
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* first glance. But here's the thing: during run time linking of
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* a binary, stat() may not be actually needing symbol stat. It
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* might as well not had been stat() in the first place (see the
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* reasoning at the beginning of this file). However, if we would
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* expose stat symbol here, we will poison the well and trick
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* dynamic linker into thinking we are some old binary that still
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* uses the symbol. So whenever code from upper layers calls
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* stat(), the control would get here, but real_stat can actually
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* be a NULL pointer because newer glibc have __xstat instead.
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* Worse, it can have __xstat64 instead __xstat.
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*
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* Anyway, these ifdefs are there to implement the following
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* preference function:
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*
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* stat < stat64 < __xstat < __xstat64
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*
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* It's the same story with lstat.
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* Also, I feel sorry for you that you had to read this.
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*/
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#if defined(HAVE_STAT) && !defined(HAVE___XSTAT)
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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, "stat");
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return real_stat(path, sb);
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}
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#endif
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#if defined(HAVE_STAT64) && !defined(HAVE___XSTAT64)
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int stat64(const char *path, struct stat64 *sb)
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{
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init_syms();
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checkPath(path, "stat");
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return real_stat64(path, sb);
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}
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#endif
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#if defined(HAVE___XSTAT) && !defined(HAVE___XSTAT64)
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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, "stat");
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return real___xstat(ver, path, sb);
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}
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#endif
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#if defined(HAVE___XSTAT64)
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int
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__xstat64(int ver, const char *path, struct stat64 *sb)
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{
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init_syms();
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checkPath(path, "stat");
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return real___xstat64(ver, path, sb);
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}
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#endif
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#if defined(HAVE_LSTAT) && !defined(HAVE___LXSTAT)
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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, "lstat");
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return real_lstat(path, sb);
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}
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#endif
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#if defined(HAVE_LSTAT64) && !defined(HAVE___LXSTAT64)
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int
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lstat64(const char *path, struct stat64 *sb)
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{
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init_syms();
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checkPath(path, "lstat");
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return real_lstat64(path, sb);
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}
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#endif
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#if defined(HAVE___LXSTAT) && !defined(HAVE___LXSTAT64)
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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, "lstat");
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return real___lxstat(ver, path, sb);
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}
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#endif
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#if defined(HAVE___LXSTAT64)
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int
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__lxstat64(int ver, const char *path, struct stat64 *sb)
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{
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init_syms();
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checkPath(path, "lstat");
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return real___lxstat64(ver, path, sb);
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}
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#endif
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int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
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{
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init_syms();
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#ifdef HAVE_SYS_UN_H
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if (addrlen == sizeof(struct sockaddr_un)) {
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struct sockaddr_un *tmp = (struct sockaddr_un *) addr;
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if (tmp->sun_family == AF_UNIX)
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CHECK_PATH(tmp->sun_path);
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}
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#endif
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return real_connect(sockfd, addr, addrlen);
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}
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