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add putenv interface

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This commit is contained in:
dockes 2005-11-18 13:52:48 +00:00
parent 6cba3b65c1
commit b83513021d
2 changed files with 44 additions and 8 deletions
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21
src/utils/execmd.cpp
View File

@ -1,5 +1,5 @@
#ifndef lint
static char rcsid[] = "@(#$Id: execmd.cpp,v 1.6 2005-03-17 14:02:05 dockes Exp $ (C) 2004 J.F.Dockes";
static char rcsid[] = "@(#$Id: execmd.cpp,v 1.7 2005-11-18 13:52:48 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
#ifndef TEST_EXECMD
#include <unistd.h>
@ -21,11 +21,15 @@ static char rcsid[] = "@(#$Id: execmd.cpp,v 1.6 2005-03-17 14:02:05 dockes Exp $
using namespace std;
#define MAX(A,B) (A>B?A:B)
int
ExecCmd::doexec(const string &cmd, const list<string>& args,
void ExecCmd::putenv(const string &ea)
{
env.push_back(ea);
}
int ExecCmd::doexec(const string &cmd, const list<string>& args,
const string *input, string *output)
{
{
{ // Debug and logging
string command = cmd + " ";
for (list<string>::const_iterator it = args.begin();it != args.end();
it++) {
@ -186,6 +190,10 @@ ExecCmd::doexec(const string &cmd, const list<string>& args,
while (argv[i]) cerr << argv[i++] << endl;}
#endif
for (it = env.begin(); it != env.end(); it++) {
::putenv(it->c_str());
}
execvp(cmd.c_str(), (char *const*)argv);
// Hu ho
LOGERR(("ExecCmd::doexec: execvp(%s) failed. errno %d\n", cmd.c_str(),
@ -224,7 +232,12 @@ int main(int argc, const char **argv)
input = data;
string *ip = 0;
//ip = &input;
mexec.putenv("TESTVARIABLE1=TESTVALUE1");
mexec.putenv("TESTVARIABLE2=TESTVALUE2");
mexec.putenv("TESTVARIABLE3=TESTVALUE3");
int status = mexec.doexec(cmd, l, ip, &output);
fprintf(stderr, "Status: 0x%x\n", status);
cout << "Output:" << output << endl;
exit (status >> 8);

31
src/utils/execmd.h
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@ -1,17 +1,40 @@
#ifndef _EXECMD_H_INCLUDED_
#define _EXECMD_H_INCLUDED_
/* @(#$Id: execmd.h,v 1.2 2005-03-17 14:02:06 dockes Exp $ (C) 2004 J.F.Dockes */
/* @(#$Id: execmd.h,v 1.3 2005-11-18 13:52:48 dockes Exp $ (C) 2004 J.F.Dockes */
#include <string>
#include <list>
/**
Execute command possibly taking both input and output (will do
asynchronous io as appropriate for things to work).
*/
class ExecCmd {
public:
// ExecCmd() : argv(0) {};
// ~ExeCmd() {delete [] argv;}
int doexec(const std::string &cmd, const std::list<std::string>& a,
/**
* Execute command. Both input and output can be specified, and
* asynchronous io is used to prevent blocking. This wont work if
* input and output need to be synchronized (ie: Q/A), but ok for
* filtering.
* @param cmd the program to execute. This must be an absolute file name
* or exist in the PATH.
* @param args the argument list (NOT including argv[0]).
* @param input Input to send to the command.
* @param output Output from the command.
* @return the exec ouput status (0 if ok).
*/
int doexec(const std::string &cmd, const std::list<std::string>& args,
const std::string *input = 0,
std::string *output = 0);
/**
* Add/replace environment variable before executing command. This should
* be called before doexec of course.
* @param envassign an environment assignment string (name=value)
*/
void putenv(const std::string &envassign);
private:
std::list<std::string> env;
};