问题描述
我正在使用Linux Mint 12.
我想运行一个程序usr/share/application/firefox，然后在任何地方传递一个字符串.我还没有找到适用于Linux的解决方案，但是到目前为止，我发现Windows的理论很多.
size_t ExecuteProcess(std::wstring FullPathToExe, std::wstring Parameters, size_t SecondsToWait)
{
size_t iMyCounter = 0, iReturnVal = 0, iPos = 0;
DWORD dwExitCode = 0;
std::wstring sTempStr = L"";
/* - NOTE - You should check here to see if the exe even exists */
/* Add a space to the beginning of the Parameters */
if (Parameters.size() != 0)
{
if (Parameters[0] != L' ')
{
Parameters.insert(0,L" ");
}
}
/* The first parameter needs to be the exe itself */
sTempStr = FullPathToExe;
iPos = sTempStr.find_last_of(L"\\");
sTempStr.erase(0, iPos +1);
Parameters = sTempStr.append(Parameters);
/* CreateProcessW can modify Parameters thus we allocate needed memory */
wchar_t * pwszParam = new wchar_t[Parameters.size() + 1];
if (pwszParam == 0)
{
return 1;
}
const wchar_t* pchrTemp = Parameters.c_str();
wcscpy_s(pwszParam, Parameters.size() + 1, pchrTemp);
/* CreateProcess API initialization */
STARTUPINFOW siStartupInfo;
PROCESS_INFORMATION piProcessInfo;
memset(&siStartupInfo, 0, sizeof(siStartupInfo));
memset(&piProcessInfo, 0, sizeof(piProcessInfo));
siStartupInfo.cb = sizeof(siStartupInfo);
if (CreateProcessW(const_cast<LPCWSTR>(FullPathToExe.c_str()),
pwszParam, 0, 0, false,
CREATE_DEFAULT_ERROR_MODE, 0, 0,
&siStartupInfo, &piProcessInfo) != false)
{
/* Watch the process. */
dwExitCode = WaitForSingleObject(piProcessInfo.hProcess, (SecondsToWait * 1000));
}
else
{
/* CreateProcess failed */
iReturnVal = GetLastError();
}
/* Free memory */
delete[]pwszParam;
pwszParam = 0;
/* Release handles */
CloseHandle(piProcessInfo.hProcess);
CloseHandle(piProcessInfo.hThread);
return iReturnVal;
}
您可以在此处看到许多理论第一个答案描述了如何获得它在Linux上使用C完成，我想在C ++上完成，我已经搜索了几个小时，并且看到了许多理论.该学科似乎比量子物理学具有更多的理论.
我是一名Python专家，因为我喜欢简单，因此请给出一个简单的代码，该代码将尽可能在32位和64位上运行.
我想做一些类似的事情，如果usr/share/application/firefox可用，运行它，否则运行usr/share/application/googlechrome
您能告诉我为什么在Mac和Windows上不能运行相同的代码吗?
可以使用system来完成此操作，这与在Python或fork中调用os.system以及在execl或popen中调用类似于在Python中调用subprocess.Popen.
一些示例如下所示.它们应该可以在Linux或Mac上运行.
对于Windows，请使用_system和_popen，使用C预处理器的if定义函数.
IFDEF示例
#ifdef __unix__ /* __unix__ is usually defined by compilers targeting Unix systems */
# callto system goes here
#elif defined _WIN32 /* _Win32 is usually defined by compilers targeting 32 or 64 bit Windows systems */
# callto _system goes here
#endif
它们取决于体系结构，尽管firefox二进制文件的位置可能不在各种系统上.
系统
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
system("/usr/share/application/firefox");
printf("Command done!");
return 0;
}
popen
#include <stdio.h>
int main(int argc, char **argv))
{
FILE *fpipe;
char *command="/usr/share/application/firefox";
char line[256];
if ( !(fpipe = (FILE*)popen(command,"r")) )
{ // If fpipe is NULL
perror("Problems with pipe");
exit(1);
}
while ( fgets( line, sizeof line, fpipe))
{
printf("%s", line);
}
pclose(fpipe);
return 0;
}
I'm on Linux mint 12.
I want to run a program usr/share/application/firefox and then pass a string anywhere. I haven't found a solution for Linux but from what I've seen so far, there are many theories for Windows.
size_t ExecuteProcess(std::wstring FullPathToExe, std::wstring Parameters, size_t SecondsToWait)
{
size_t iMyCounter = 0, iReturnVal = 0, iPos = 0;
DWORD dwExitCode = 0;
std::wstring sTempStr = L"";
/* - NOTE - You should check here to see if the exe even exists */
/* Add a space to the beginning of the Parameters */
if (Parameters.size() != 0)
{
if (Parameters[0] != L' ')
{
Parameters.insert(0,L" ");
}
}
/* The first parameter needs to be the exe itself */
sTempStr = FullPathToExe;
iPos = sTempStr.find_last_of(L"\\");
sTempStr.erase(0, iPos +1);
Parameters = sTempStr.append(Parameters);
/* CreateProcessW can modify Parameters thus we allocate needed memory */
wchar_t * pwszParam = new wchar_t[Parameters.size() + 1];
if (pwszParam == 0)
{
return 1;
}
const wchar_t* pchrTemp = Parameters.c_str();
wcscpy_s(pwszParam, Parameters.size() + 1, pchrTemp);
/* CreateProcess API initialization */
STARTUPINFOW siStartupInfo;
PROCESS_INFORMATION piProcessInfo;
memset(&siStartupInfo, 0, sizeof(siStartupInfo));
memset(&piProcessInfo, 0, sizeof(piProcessInfo));
siStartupInfo.cb = sizeof(siStartupInfo);
if (CreateProcessW(const_cast<LPCWSTR>(FullPathToExe.c_str()),
pwszParam, 0, 0, false,
CREATE_DEFAULT_ERROR_MODE, 0, 0,
&siStartupInfo, &piProcessInfo) != false)
{
/* Watch the process. */
dwExitCode = WaitForSingleObject(piProcessInfo.hProcess, (SecondsToWait * 1000));
}
else
{
/* CreateProcess failed */
iReturnVal = GetLastError();
}
/* Free memory */
delete[]pwszParam;
pwszParam = 0;
/* Release handles */
CloseHandle(piProcessInfo.hProcess);
CloseHandle(piProcessInfo.hThread);
return iReturnVal;
}
You can see many theories here the first answer describes how to get it done for Linux with C, I want to do it with C++, I've been googling for hours and i saw many theories. This subject appears to have more theories than quantum physics :)
I am a Python guy, because I like simplicity, so please give a simple code that would work on 32 and 64 bit if possible.
I would like to do something like if usr/share/application/firefox is available, run it, else run usr/share/application/googlechrome
And would you please tell me why can't the same code run on Mac and Windows?
This can be done using either system which is the same as calling os.system in Python or fork and execl or popen which is similar to calling subprocess.Popen in Python.
Some examples are shown below. They should work on Linux or Mac.
For Windows use _system and _popen instead, using if defined function of the C preprocessor.
IFDEF Example
#ifdef __unix__ /* __unix__ is usually defined by compilers targeting Unix systems */
# callto system goes here
#elif defined _WIN32 /* _Win32 is usually defined by compilers targeting 32 or 64 bit Windows systems */
# callto _system goes here
#endif
They are architecture dependent, though the location of the firefox binary may not be on various systems.
system
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
system("/usr/share/application/firefox");
printf("Command done!");
return 0;
}
popen
#include <stdio.h>
int main(int argc, char **argv))
{
FILE *fpipe;
char *command="/usr/share/application/firefox";
char line[256];
if ( !(fpipe = (FILE*)popen(command,"r")) )
{ // If fpipe is NULL
perror("Problems with pipe");
exit(1);
}
while ( fgets( line, sizeof line, fpipe))
{
printf("%s", line);
}
pclose(fpipe);
return 0;
}
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