copyright : (C) 2001 by Intra2net AG
***************************************************************************/
+#include <errno.h>
#include <stdio.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <unistd.h>
-#include <string>
#include <streambuf>
#include <istream>
#include <ostream>
#include <cstdio>
+#include <boost/foreach.hpp>
+#include <boost/shared_array.hpp>
#include "exception.hxx"
+#include "stringfunc.hxx"
#include "pipestream.hxx"
+/** @brief runs command and returns it's output as string
+ * @param command the full command with all parameters
+ * @param rescode struct containing the return code, if the program exited normally and so on
+ * @returns the output (stdout) of the called program
+ */
+template <typename CmdT>
+std::string capture_exec(CmdT command, ExecResult &rescode)
+{
+ std::string output;
+
+ bool exit_set = false;
+ int exit_status_waitpid;
+
+ // set the results to false until we are sure we have proper values
+ rescode.normal_exit = false;
+ rescode.terminated_by_signal = false;
+
+ try
+ {
+ {
+ inpipestream ips(command);
+
+ ips.store_exit_status(&exit_set, &exit_status_waitpid);
+
+ char buffer[2048];
+ while (ips.good())
+ {
+ ips.read(buffer, sizeof(buffer));
+ output.append(buffer, ips.gcount());
+ }
+ }
+
+ // exit_status_waitpid only valid after destruction of the inpipestream
+
+ if (exit_set)
+ {
+ rescode.normal_exit = WIFEXITED(exit_status_waitpid);
+ if (rescode.normal_exit)
+ rescode.return_code = WEXITSTATUS(exit_status_waitpid);
+
+ rescode.terminated_by_signal = WIFSIGNALED(exit_status_waitpid);
+ if (rescode.terminated_by_signal)
+ rescode.signal = WTERMSIG(exit_status_waitpid);
+ }
+ }
+ catch (pipestream_error &e)
+ {
+ rescode.error_message = e.what();
+ }
+
+ return output;
+}
+
+std::string capture_exec (const std::string &command, ExecResult &res)
+{ return capture_exec<const std::string &>(command, res); }
+
+std::string capture_exec (const char *const *command, ExecResult &res)
+{ return capture_exec<const char *const *>(command, res); }
+
+std::string capture_exec (const std::vector<std::string> &command, ExecResult &res)
+{
+ return capture_exec<const std::vector<std::string> &>(command, res);
+}
+
+#define PIPE_CTOR_FAIL(where) \
+ do { \
+ throw EXCEPTION (pipestream_error, \
+ std::string (where) + ": error " \
+ + I2n::to_string (errno) \
+ + " (" + std::string (strerror (errno)) + ")"); \
+ } while (0)
+
+static boost::shared_array <char *>
+mk_argv (const std::vector<std::string> &command)
+{
+ char **ret = NULL;
+
+ try {
+ ret = new char *[command.size () * sizeof (ret[0]) + 1];
+ } catch (std::bad_alloc &) {
+ return boost::shared_array<char *> ();
+ }
+
+ size_t cur = 0;
+ BOOST_FOREACH(const std::string &arg, command) {
+ /*
+ * Casting away constness is safe since the data is always
+ * kept alive until after exec().
+ */
+ ret [cur++] = const_cast<char *> (arg.c_str ());
+ }
+
+ ret [cur] = NULL;
+
+ return boost::shared_array<char *> (ret);
+}
+
+
+FILE *
+inpipebuf::init_without_shell (const char *const *argv) const
+{
+ FILE *pipeobj = NULL;
+ int pipefd [2];
+
+ errno = 0;
+ if (::pipe (pipefd) == -1) {
+ PIPE_CTOR_FAIL("pipe");
+ }
+
+ errno = 0;
+ pid_t childpid = fork ();
+ switch (childpid) {
+ case -1: {
+ PIPE_CTOR_FAIL("fork");
+ break;
+ }
+ case 0: {
+ close (pipefd [0]);
+
+ if (dup2 (pipefd[1], STDOUT_FILENO) == -1) {
+ PIPE_CTOR_FAIL("dup2");
+ }
+
+ if (dup2 (pipefd[1], STDERR_FILENO) == -1) {
+ PIPE_CTOR_FAIL("dup2");
+ }
+
+ errno = 0;
+ if (execve (argv [0], const_cast <char *const *>(argv), NULL) == -1) {
+ PIPE_CTOR_FAIL("exec");
+ }
+ break;
+ }
+ default: {
+ close (pipefd [1]);
+
+ errno = 0;
+ if ((pipeobj = fdopen (pipefd [0], "r")) == NULL) {
+ PIPE_CTOR_FAIL("fdopen");
+ }
+ break;
+ }
+ }
+
+ return pipeobj;
+}
+
+inpipebuf::inpipebuf(const char *const *command)
+ : pipe (NULL) /* brr: shadowing global ident */
+ , status_set (NULL)
+ , exit_status (NULL)
+{
+ if (command == NULL || command [0] == NULL) {
+ PIPE_CTOR_FAIL("command");
+ }
+
+ this->pipe = this->init_without_shell (command);
+
+ setg (&buffer, &buffer, &buffer);
+}
+
+inpipebuf::inpipebuf(const std::vector<std::string> &command)
+ : pipe (NULL) /* brr: shadowing global ident */
+ , status_set (NULL)
+ , exit_status (NULL)
+{
+ if (command.empty ()) {
+ PIPE_CTOR_FAIL("command");
+ }
+
+ const boost::shared_array <char *> argv = mk_argv (command);
+ if (!argv) {
+ PIPE_CTOR_FAIL("malloc");
+ }
+
+ this->pipe = this->init_without_shell (argv.get ());
+
+ setg (&buffer, &buffer, &buffer);
+}
+
inpipebuf::inpipebuf(const std::string& command)
{
status_set = NULL;
return traits_type::to_int_type(*gptr());
}
-/** @brief runs command and returns it's output as string
- * @param command the full command with all parameters
- * @param exit_status the full exit status, use WEXITSTATUS to get the "regular" return code
- * @returns the output (stderr) of the called program
- */
-std::string pipe_to_string(const std::string& command, std::string *error, int *_exit_status)
-{
- std::string result;
- bool exit_set;
-
- try
- {
- inpipestream ips(command);
-
- ips.store_exit_status(&exit_set, _exit_status);
-
- char buffer[2048];
- while (ips.good())
- {
- ips.read(buffer, sizeof(buffer));
- result.append(buffer, ips.gcount());
- }
- }
- catch (pipestream_error &e)
- {
- if (error)
- *error=e.what();
- return "";
- }
- catch(...)
- {
- throw;
- }
-
- return result;
-}
-
outpipebuf::outpipebuf(const std::string& command)
{
status_set = NULL;
git://developer.intra2net.com / libi2ncommon / blobdiff