#include <stdio.h>
+#include <cstring>
#include <string>
#include <streambuf>
#include <istream>
#include <ostream>
-#include <cstdio>
+#include <vector>
-#include "exception.hxx"
+#include <stringfunc.hxx>
-// ATTENTION: A lot of mysterious STL bugs occured
-// with a "real" buffer (buffer larger than 1 byte and up to 100 bytes)
-// -> Keep it slow and working!
+struct ExecResult
+{
+ /** if the program exited normally and returned a return code */
+ bool normal_exit;
+
+ /** the real return code of the program, only set when normal_exit true */
+ char return_code;
+
+ /** if the program was terminated by a signal */
+ bool terminated_by_signal;
+
+ /** number of the signal that terminated the program, only valid when terminated_by_signal true */
+ int signal;
+
+ /** errormessage if we have one */
+ std::string error_message;
+
+ inline std::string format (void) const
+ {
+ return std::string ("(")
+ + "(normal_exit " + (this->normal_exit ? "T" : "F") + ") "
+ "(return_code '" + I2n::to_string ((int)this->return_code) + "') "
+ "(signal " + (this->terminated_by_signal
+ ? strsignal (this->signal)
+ : "<nil>") + "))"
+ ;
+ };
+};
+typedef struct ExecResult ExecResult;
+
+std::string capture_exec(const std::string& command, ExecResult &rescode);
+std::string capture_exec(const char *const *command, ExecResult &rescode,
+ const bool out=true, const bool err=false,
+ const bool path=false, const bool env=false);
+std::string capture_exec(const std::vector<std::string>& command, ExecResult &rescode,
+ const bool out=true, const bool err=false,
+ const bool path=false, const bool env=false);
+
+inline std::string capture_exec (const std::string &command)
+{
+ ExecResult r;
+ return capture_exec(command,r);
+}
+
+inline std::string capture_exec(const char *const *command)
+{
+ ExecResult r;
+ return capture_exec(command,r);
+}
+inline std::string capture_exec(const std::vector<std::string>& command)
+{
+ ExecResult r;
+ return capture_exec(command,r);
+}
+
+/** @brief runs command and provides buffered input for it through pipe
+ *
+ * opens pipe to command using popen; exit status available after destruction
+ * (use WEXITSTATUS to get the "regular" return code (lowest byte))
+ *
+ * ATTENTION: A lot of mysterious STL bugs occured
+ * with a "real" buffer (buffer larger than 1 byte and up to 100 bytes)
+ * -> Keep it slow and working!
+ */
class inpipebuf : public std::streambuf
{
protected:
char buffer;
+
FILE *pipe;
+ pid_t pid;
// "callback" variables for destructor to store exit status
bool *status_set;
int *exit_status;
public:
- inpipebuf(const std::string& command)
- {
- status_set = NULL;
- exit_status = NULL;
-
- pipe = popen (command.c_str(), "r");
- if (pipe == NULL)
- throw EXCEPTION (pipestream_error, "can't open program or permission denied");
-
- // force underflow
- setg (&buffer, &buffer, &buffer);
- }
-
- ~inpipebuf()
- {
- if (pipe != NULL) {
- int pclose_exit = pclose (pipe);
+ inpipebuf(const std::string& command,
+ const bool out, const bool err, const bool path, const bool env);
+ inpipebuf(const char *const *command,
+ const bool out, const bool err, const bool path, const bool env);
+ inpipebuf(const std::vector<std::string> &command,
+ const bool out, const bool err, const bool path, const bool env);
- if (exit_status && pclose_exit != -1) {
- *status_set = true;
- *exit_status = pclose_exit;
- }
+ ~inpipebuf();
- pipe = NULL;
- }
- }
-
- void store_exit_status(bool *_status_set, int *_exit_status)
- { status_set = _status_set; exit_status = _exit_status; }
+ void store_exit_status(bool *_status_set, int *_exit_status);
protected:
- virtual int_type underflow()
- {
- if (gptr() < egptr())
- return traits_type::to_int_type(*gptr());
-
- buffer = fgetc (pipe);
- if (feof (pipe))
- {
- // ERROR or EOF
- return EOF;
- }
-
- setg (&buffer, &buffer, &buffer+sizeof(char));
+ virtual int_type underflow();
- return traits_type::to_int_type(*gptr());
- }
+private:
+ std::pair <pid_t, FILE *>
+ init_without_shell (const char *const *argv,
+ const bool out, const bool err,
+ const bool path, const bool env) const;
};
+/** @brief stream around inpipebuf -- see comment there */
class inpipestream : public std::istream
{
protected:
inpipebuf buf;
public:
- inpipestream(const std::string& command)
- : std::istream(&buf), buf(command)
+ inpipestream(const std::string& command,
+ const bool out=true, const bool err=false,
+ const bool path=false, const bool env=false)
+ : std::istream(&buf), buf(command, out, err, path, env)
+ {}
+
+ inpipestream(const char *const command[],
+ const bool out=true, const bool err=false,
+ const bool path=false, const bool env=false)
+ : std::istream(&buf), buf(command, out, err, path, env)
+ {}
+
+ inpipestream(const std::vector<std::string> &command,
+ const bool out=true, const bool err=false,
+ const bool path=false, const bool env=false)
+ : std::istream(&buf), buf(command, out, err, path, env)
{}
void store_exit_status(bool *_status_set, int *_exit_status)
{ buf.store_exit_status(_status_set, _exit_status); }
};
+/** @brief runs command and provides buffered ouptput from it through pipe
+ *
+ * opens pipe to command using popen; exit status available after destruction
+ * (use WEXITSTATUS to get the "regular" return code (lowest byte))
+ */
class outpipebuf : public std::streambuf
{
protected:
int *exit_status;
public:
- outpipebuf(const std::string& command)
- {
- status_set = NULL;
- exit_status = NULL;
+ outpipebuf(const std::string& command);
- pipe = popen (command.c_str(), "w");
- if (pipe == NULL)
- throw EXCEPTION (pipestream_error, "can't open program or permission denied");
- }
+ ~outpipebuf();
- ~outpipebuf()
- {
- if (pipe != NULL) {
- int pclose_exit = pclose (pipe);
-
- if (exit_status && pclose_exit != -1) {
- *status_set = true;
- *exit_status = pclose_exit;
- }
-
- pipe = NULL;
- }
- }
-
- void store_exit_status(bool *_status_set, int *_exit_status)
- { status_set = _status_set; exit_status = _exit_status; }
+ /** note: exit status only available after destruction */
+ void store_exit_status(bool *_status_set, int *_exit_status);
protected:
- virtual int_type overflow(int_type c)
- {
- if (c != EOF)
- {
- if (fputc(c,pipe)==EOF)
- return EOF;
- }
- return c;
- }
-
- virtual std::streamsize xsputn(const char* s, std::streamsize num)
- {
- return fwrite(s,num,1,pipe);
- }
+ virtual int_type overflow(int_type c);
+
+ virtual std::streamsize xsputn(const char* s, std::streamsize num);
};
+
+/** @brief stream around outpipebuf -- see comment there */
class outpipestream : public std::ostream
{
protected:
git://developer.intra2net.com / libi2ncommon / blobdiff