/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2019, Google Inc. * * process_test.cpp - Process test */ #include #include #include #include #include #include #include #include "libcamera/internal/process.h" #include "test.h" using namespace std; using namespace libcamera; class ProcessTestChild { public: int run(int status) { usleep(50000); return status; } }; class ProcessTest : public Test { public: ProcessTest() : exitStatus_(Process::NotExited), exitCode_(-1) { } protected: int run() { EventDispatcher *dispatcher = Thread::current()->eventDispatcher(); Timer timeout; int exitCode = 42; vector args; args.push_back(to_string(exitCode)); proc_.finished.connect(this, &ProcessTest::procFinished); /* Test that kill() on an unstarted process is safe. */ proc_.kill(); /* Test starting the process and retrieving the exit code. */ int ret = proc_.start("/proc/self/exe", args); if (ret) { cerr << "failed to start process" << endl; return TestFail; } timeout.start(2000); while (timeout.isRunning() && exitStatus_ == Process::NotExited) dispatcher->processEvents(); if (exitStatus_ != Process::NormalExit) { cerr << "process did not exit normally" << endl; return TestFail; } if (exitCode != exitCode_) { cerr << "exit code should be " << exitCode << ", actual is " << exitCode_ << endl; return TestFail; } return TestPass; } private: void procFinished([[maybe_unused]] Process *proc, enum Process::ExitStatus exitStatus, int exitCode) { exitStatus_ = exitStatus; exitCode_ = exitCode; } ProcessManager processManager_; Process proc_; enum Process::ExitStatus exitStatus_; int exitCode_; }; /* * Can't use TEST_REGISTER() as single binary needs to act as both * parent and child processes. */ int main(int argc, char **argv) { if (argc == 2) { int status = std::stoi(argv[1]); ProcessTestChild child; return child.run(status); } return ProcessTest().execute(); } ype='submit' value='search'/>
path: root/src/libcamera/utils.cpp
blob: fbadf350908abca5f08c06e1299f4dad68d8ee14 (plain) 
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * utils.cpp - Miscellaneous utility functions
 */

#include "utils.h"

#include <dlfcn.h>
#include <elf.h>
#include <iomanip>
#include <limits.h>
#include <link.h>
#include <sstream>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

/**
 * \file utils.h
 * \brief Miscellaneous utility functions
 */

/* musl doesn't declare _DYNAMIC in link.h, declare it manually. */
extern ElfW(Dyn) _DYNAMIC[];

namespace libcamera {

namespace utils {

/**
 * \def ARRAY_SIZE(array)
 * \brief Determine the number of elements in the static array.
 */

/**
 * \brief Strip the directory prefix from the path
 * \param[in] path The path to process
 *
 * basename is implemented differently across different C libraries. This
 * implementation matches the one provided by the GNU libc, and does not
 * modify its input parameter.
 *
 * \return A pointer within the given path without any leading directory
 * components.
 */
const char *basename(const char *path)
{
       const char *base = strrchr(path, '/');
       return base ? base + 1 : path;
}

/**
 * \brief Get an environment variable
 * \param[in] name The name of the variable to return
 *
 * The environment list is searched to find the variable 'name', and the
 * corresponding string is returned.
 *
 * If 'secure execution' is required then this function always returns NULL to
 * avoid vulnerabilities that could occur if set-user-ID or set-group-ID
 * programs accidentally trust the environment.
 *
 * \return A pointer to the value in the environment or NULL if the requested
 * environment variable doesn't exist or if secure execution is required.
 */
char *secure_getenv(const char *name)
{
#if HAVE_SECURE_GETENV
	return ::secure_getenv(name);
#else
	if (issetugid())
		return NULL;

	return getenv(name);
#endif
}

/**
 * \brief Identify the dirname portion of a path
 * \param[in] path The full path to parse
 *
 * This function conforms with the behaviour of the %dirname() function as
 * defined by POSIX.
 *
 * \return A string of the directory component of the path
 */
std::string dirname(const std::string &path)
{
	if (path.empty())
		return ".";

	/*
	 * Skip all trailing slashes. If the path is only made of slashes,
	 * return "/".
	 */
	size_t pos = path.size() - 1;
	while (path[pos] == '/') {