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authorMounir IDRASSI <mounir.idrassi@idrix.fr>2014-05-31 16:44:53 (GMT)
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2014-11-08 22:18:59 (GMT)
commit7ffce028d04a6b13ef762e2b89c34b688e8ca59d (patch)
treeeefedb6e94de5b26fa963675969490c641c29077 /src/Platform/Unix/Process.cpp
parent97011f179cfd3dcd12446ef4ccb6964c8e52c3db (diff)
downloadVeraCrypt-7ffce028d04a6b13ef762e2b89c34b688e8ca59d.zip
VeraCrypt-7ffce028d04a6b13ef762e2b89c34b688e8ca59d.tar.gz
Add TrueCrypt 7.1a MacOSX/Linux specific source files.
Diffstat (limited to 'src/Platform/Unix/Process.cpp')
-rw-r--r--src/Platform/Unix/Process.cpp202
1 files changed, 202 insertions, 0 deletions
diff --git a/src/Platform/Unix/Process.cpp b/src/Platform/Unix/Process.cpp
new file mode 100644
index 0000000..d99dff8
--- /dev/null
+++ b/src/Platform/Unix/Process.cpp
@@ -0,0 +1,202 @@
+/*
+ Copyright (c) 2008 TrueCrypt Developers Association. All rights reserved.
+
+ Governed by the TrueCrypt License 3.0 the full text of which is contained in
+ the file License.txt included in TrueCrypt binary and source code distribution
+ packages.
+*/
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include "Process.h"
+#include "Platform/Exception.h"
+#include "Platform/FileStream.h"
+#include "Platform/ForEach.h"
+#include "Platform/MemoryStream.h"
+#include "Platform/SystemException.h"
+#include "Platform/StringConverter.h"
+#include "Platform/Unix/Pipe.h"
+#include "Platform/Unix/Poller.h"
+
+namespace TrueCrypt
+{
+ string Process::Execute (const string &processName, const list <string> &arguments, int timeOut, ProcessExecFunctor *execFunctor, const Buffer *inputData)
+ {
+ char *args[32];
+ if (array_capacity (args) <= arguments.size())
+ throw ParameterTooLarge (SRC_POS);
+
+#if 0
+ stringstream dbg;
+ dbg << "exec " << processName;
+ foreach (const string &at, arguments)
+ dbg << " " << at;
+ trace_msg (dbg.str());
+#endif
+
+ Pipe inPipe, outPipe, errPipe, exceptionPipe;
+
+ int forkedPid = fork();
+ throw_sys_if (forkedPid == -1);
+
+ if (forkedPid == 0)
+ {
+ try
+ {
+ try
+ {
+ int argIndex = 0;
+ if (!execFunctor)
+ args[argIndex++] = const_cast <char*> (processName.c_str());
+
+ foreach (const string &arg, arguments)
+ {
+ args[argIndex++] = const_cast <char*> (arg.c_str());
+ }
+ args[argIndex] = nullptr;
+
+ if (inputData)
+ {
+ throw_sys_if (dup2 (inPipe.GetReadFD(), STDIN_FILENO) == -1);
+ }
+ else
+ {
+ inPipe.Close();
+ int nullDev = open ("/dev/null", 0);
+ throw_sys_sub_if (nullDev == -1, "/dev/null");
+ throw_sys_if (dup2 (nullDev, STDIN_FILENO) == -1);
+ }
+
+ throw_sys_if (dup2 (outPipe.GetWriteFD(), STDOUT_FILENO) == -1);
+ throw_sys_if (dup2 (errPipe.GetWriteFD(), STDERR_FILENO) == -1);
+ exceptionPipe.GetWriteFD();
+
+ if (execFunctor)
+ {
+ (*execFunctor)(argIndex, args);
+ }
+ else
+ {
+ execvp (args[0], args);
+ throw SystemException (SRC_POS, args[0]);
+ }
+ }
+ catch (Exception &)
+ {
+ throw;
+ }
+ catch (exception &e)
+ {
+ throw ExternalException (SRC_POS, StringConverter::ToExceptionString (e));
+ }
+ catch (...)
+ {
+ throw UnknownException (SRC_POS);
+ }
+ }
+ catch (Exception &e)
+ {
+ try
+ {
+ shared_ptr <Stream> outputStream (new FileStream (exceptionPipe.GetWriteFD()));
+ e.Serialize (outputStream);
+ }
+ catch (...) { }
+ }
+
+ _exit (1);
+ }
+
+ throw_sys_if (fcntl (outPipe.GetReadFD(), F_SETFL, O_NONBLOCK) == -1);
+ throw_sys_if (fcntl (errPipe.GetReadFD(), F_SETFL, O_NONBLOCK) == -1);
+ throw_sys_if (fcntl (exceptionPipe.GetReadFD(), F_SETFL, O_NONBLOCK) == -1);
+
+ vector <char> buffer (4096), stdOutput (4096), errOutput (4096), exOutput (4096);
+ buffer.clear ();
+ stdOutput.clear ();
+ errOutput.clear ();
+ exOutput.clear ();
+
+ Poller poller (outPipe.GetReadFD(), errPipe.GetReadFD(), exceptionPipe.GetReadFD());
+ int status, waitRes;
+
+ if (inputData)
+ throw_sys_if (write (inPipe.GetWriteFD(), inputData->Ptr(), inputData->Size()) == -1 && errno != EPIPE);
+
+ inPipe.Close();
+
+ int timeTaken = 0;
+ do
+ {
+ const int pollTimeout = 200;
+ try
+ {
+ ssize_t bytesRead = 0;
+ foreach (int fd, poller.WaitForData (pollTimeout))
+ {
+ bytesRead = read (fd, &buffer[0], buffer.capacity());
+ if (bytesRead > 0)
+ {
+ if (fd == outPipe.GetReadFD())
+ stdOutput.insert (stdOutput.end(), buffer.begin(), buffer.begin() + bytesRead);
+ else if (fd == errPipe.GetReadFD())
+ errOutput.insert (errOutput.end(), buffer.begin(), buffer.begin() + bytesRead);
+ else if (fd == exceptionPipe.GetReadFD())
+ exOutput.insert (exOutput.end(), buffer.begin(), buffer.begin() + bytesRead);
+ }
+ }
+
+ if (bytesRead == 0)
+ {
+ waitRes = waitpid (forkedPid, &status, 0);
+ break;
+ }
+ }
+ catch (TimeOut&)
+ {
+ timeTaken += pollTimeout;
+ if (timeOut >= 0 && timeTaken >= timeOut)
+ throw;
+ }
+ } while ((waitRes = waitpid (forkedPid, &status, WNOHANG)) == 0);
+ throw_sys_if (waitRes == -1);
+
+ if (!exOutput.empty())
+ {
+ auto_ptr <Serializable> deserializedObject;
+ Exception *deserializedException = nullptr;
+
+ try
+ {
+ shared_ptr <Stream> stream (new MemoryStream (ConstBufferPtr ((byte *) &exOutput[0], exOutput.size())));
+ deserializedObject.reset (Serializable::DeserializeNew (stream));
+ deserializedException = dynamic_cast <Exception*> (deserializedObject.get());
+ }
+ catch (...) { }
+
+ if (deserializedException)
+ deserializedException->Throw();
+ }
+
+ int exitCode = (WIFEXITED (status) ? WEXITSTATUS (status) : 1);
+ if (exitCode != 0)
+ {
+ string strErrOutput;
+
+ if (!errOutput.empty())
+ strErrOutput.insert (strErrOutput.begin(), errOutput.begin(), errOutput.end());
+
+ throw ExecutedProcessFailed (SRC_POS, processName, exitCode, strErrOutput);
+ }
+
+ string strOutput;
+
+ if (!stdOutput.empty())
+ strOutput.insert (strOutput.begin(), stdOutput.begin(), stdOutput.end());
+
+ return strOutput;
+ }
+}