2 The software in this package is distributed under the GNU General
3 Public License version 2 (with a special exception described below).
5 A copy of GNU General Public License (GPL) is included in this distribution,
6 in the file COPYING.GPL.
8 As a special exception, if other files instantiate templates or use macros
9 or inline functions from this file, or you compile this file and link it
10 with other works to produce a work based on this file, this file
11 does not by itself cause the resulting work to be covered
12 by the GNU General Public License.
14 However the source code for this file must still be made available
15 in accordance with section (3) of the GNU General Public License.
17 This exception does not invalidate any other reasons why a work based
18 on this file might be covered by the GNU General Public License.
20 /***************************************************************************
21 inpipestream.hxx - C++ streambuffer wrapper
23 begin : Thu Dec 27 2001
24 copyright : (C) 2001 by Intra2net AG
25 ***************************************************************************/
39 #include <stringfunc.hxx>
43 /** if the program exited normally and returned a return code */
46 /** the real return code of the program, only set when normal_exit true */
49 /** if the program was terminated by a signal */
50 bool terminated_by_signal;
52 /** number of the signal that terminated the program, only valid when terminated_by_signal true */
55 /** errormessage if we have one */
56 std::string error_message;
58 inline std::string format (void) const
60 return std::string ("(")
61 + "(normal_exit " + (this->normal_exit ? "T" : "F") + ") "
62 "(return_code '" + I2n::to_string ((int)this->return_code) + "') "
63 "(signal " + (this->terminated_by_signal
64 ? strsignal (this->signal)
69 typedef struct ExecResult ExecResult;
71 namespace capture_flag {
73 static const int none = 0;
74 static const int collect_out = 1 << 0;
75 static const int collect_err = 1 << 1;
76 static const int search_path = 1 << 2;
77 static const int env_passthru = 1 << 3;
79 static const int dflt = collect_out;
80 static const int collect_any = collect_out | collect_err;
82 } /* [namespace capture_flag] */
84 std::string capture_exec(const std::string& command, ExecResult &rescode);
85 std::string capture_exec(const char *const *command, ExecResult &rescode,
86 const int flags=capture_flag::dflt);
87 std::string capture_exec(const std::vector<std::string>& command, ExecResult &rescode,
88 const int flags=capture_flag::dflt);
90 inline std::string capture_exec (const std::string &command)
93 return capture_exec(command,r);
96 inline std::string capture_exec(const char *const *command)
99 return capture_exec(command,r);
102 inline std::string capture_exec(const std::vector<std::string>& command)
105 return capture_exec(command,r);
108 /** @brief runs command and provides buffered input for it through pipe
110 * opens pipe to command using popen; exit status available after destruction
111 * (use WEXITSTATUS to get the "regular" return code (lowest byte))
113 * ATTENTION: A lot of mysterious STL bugs occured
114 * with a "real" buffer (buffer larger than 1 byte and up to 100 bytes)
115 * -> Keep it slow and working!
117 class inpipebuf : public std::streambuf
125 // "callback" variables for destructor to store exit status
130 inpipebuf(const std::string& command, const int flags);
131 inpipebuf(const char *const *command, const int flags);
132 inpipebuf(const std::vector<std::string> &command, const int flags);
136 void store_exit_status(bool *_status_set, int *_exit_status);
139 virtual int_type underflow();
142 std::pair <pid_t, FILE *>
143 init_without_shell (const char *const *argv, const int flags) const;
146 /** @brief stream around inpipebuf -- see comment there */
147 class inpipestream : public std::istream
153 inpipestream(const std::string& command,
154 const int flags=capture_flag::dflt)
155 : std::istream(&buf), buf(command, flags)
158 inpipestream(const char *const command[],
159 const int flags=capture_flag::dflt)
160 : std::istream(&buf), buf(command, flags)
163 inpipestream(const std::vector<std::string> &command,
164 const int flags=capture_flag::dflt)
165 : std::istream(&buf), buf(command, flags)
168 void store_exit_status(bool *_status_set, int *_exit_status)
169 { buf.store_exit_status(_status_set, _exit_status); }
172 /** @brief runs command and provides buffered ouptput from it through pipe
174 * opens pipe to command using popen; exit status available after destruction
175 * (use WEXITSTATUS to get the "regular" return code (lowest byte))
177 class outpipebuf : public std::streambuf
182 // "callback" variables for destructor to store exit status
187 outpipebuf(const std::string& command);
191 /** note: exit status only available after destruction */
192 void store_exit_status(bool *_status_set, int *_exit_status);
195 virtual int_type overflow(int_type c);
197 virtual std::streamsize xsputn(const char* s, std::streamsize num);
201 /** @brief stream around outpipebuf -- see comment there */
202 class outpipestream : public std::ostream
207 outpipestream(const std::string& command)
208 : std::ostream(&buf), buf(command)
211 void store_exit_status(bool *_status_set, int *_exit_status)
212 { buf.store_exit_status(_status_set, _exit_status); }