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1 | /* |
2 | The software in this package is distributed under the GNU General | |
3 | Public License version 2 (with a special exception described below). | |
4 | ||
5 | A copy of GNU General Public License (GPL) is included in this distribution, | |
6 | in the file COPYING.GPL. | |
7 | ||
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. | |
13 | ||
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. | |
16 | ||
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. | |
19 | */ | |
20 | /*************************************************************************** | |
21 | inpipestream.cpp - C++ streambuffer wrapper | |
22 | ------------------- | |
23 | begin : Thu Dec 27 2001 | |
24 | copyright : (C) 2001 by Intra2net AG | |
25 | ***************************************************************************/ | |
26 | ||
27 | #include <stdio.h> | |
28 | ||
29 | #include <string> | |
30 | #include <streambuf> | |
31 | #include <istream> | |
32 | #include <ostream> | |
33 | #include <cstdio> | |
34 | ||
35 | #include "exception.hxx" | |
36 | #include "pipestream.hxx" | |
37 | ||
38 | inpipebuf::inpipebuf(const std::string& command) | |
39 | { | |
40 | status_set = NULL; | |
41 | exit_status = NULL; | |
42 | ||
43 | pipe = popen (command.c_str(), "r"); | |
44 | if (pipe == NULL) | |
45 | throw EXCEPTION (pipestream_error, "can't open program or permission denied"); | |
46 | ||
47 | // force underflow | |
48 | setg (&buffer, &buffer, &buffer); | |
49 | } | |
50 | ||
51 | inpipebuf::~inpipebuf() | |
52 | { | |
53 | if (pipe != NULL) { | |
54 | int pclose_exit = pclose (pipe); | |
55 | ||
d00589a0 GE |
56 | if (exit_status && pclose_exit != -1) |
57 | { | |
58 | if (status_set) | |
59 | *status_set = true; | |
7e606af5 GE |
60 | *exit_status = pclose_exit; |
61 | } | |
62 | ||
63 | pipe = NULL; | |
64 | } | |
65 | } | |
66 | ||
67 | /** note: exit status only available after destruction */ | |
68 | void inpipebuf::store_exit_status(bool *_status_set, int *_exit_status) | |
69 | { | |
70 | status_set = _status_set; | |
71 | exit_status = _exit_status; | |
72 | } | |
73 | ||
74 | inpipebuf::int_type inpipebuf::underflow() | |
75 | { | |
76 | if (gptr() < egptr()) | |
77 | return traits_type::to_int_type(*gptr()); | |
78 | ||
79 | buffer = fgetc (pipe); | |
80 | if (feof (pipe)) | |
81 | { | |
82 | // ERROR or EOF | |
83 | return EOF; | |
84 | } | |
85 | ||
86 | setg (&buffer, &buffer, &buffer+sizeof(char)); | |
87 | ||
88 | return traits_type::to_int_type(*gptr()); | |
89 | } | |
90 | ||
91 | /** @brief runs command and returns it's output as string | |
92 | * @param command the full command with all parameters | |
93 | * @param exit_status the full exit status, use WEXITSTATUS to get the "regular" return code | |
94 | * @returns the output (stderr) of the called program | |
95 | */ | |
96 | std::string pipe_to_string(const std::string& command, std::string *error, int *_exit_status) | |
97 | { | |
98 | std::string result; | |
99 | bool exit_set; | |
100 | ||
101 | try | |
102 | { | |
103 | inpipestream ips(command); | |
104 | ||
105 | ips.store_exit_status(&exit_set, _exit_status); | |
106 | ||
107 | char buffer[2048]; | |
108 | while (ips.good()) | |
109 | { | |
110 | ips.read(buffer, sizeof(buffer)); | |
111 | result.append(buffer, ips.gcount()); | |
112 | } | |
113 | } | |
114 | catch (pipestream_error &e) | |
115 | { | |
116 | if (error) | |
117 | *error=e.what(); | |
118 | return ""; | |
119 | } | |
120 | catch(...) | |
121 | { | |
122 | throw; | |
123 | } | |
124 | ||
125 | return result; | |
126 | } | |
127 | ||
128 | outpipebuf::outpipebuf(const std::string& command) | |
129 | { | |
130 | status_set = NULL; | |
131 | exit_status = NULL; | |
132 | ||
133 | pipe = popen (command.c_str(), "w"); | |
134 | if (pipe == NULL) | |
135 | throw EXCEPTION (pipestream_error, "can't open program or permission denied"); | |
136 | } | |
137 | ||
138 | outpipebuf::~outpipebuf() | |
139 | { | |
140 | if (pipe != NULL) { | |
141 | int pclose_exit = pclose (pipe); | |
142 | ||
d00589a0 GE |
143 | if (exit_status && pclose_exit != -1) |
144 | { | |
145 | if (status_set) | |
146 | *status_set = true; | |
7e606af5 GE |
147 | *exit_status = pclose_exit; |
148 | } | |
149 | ||
150 | pipe = NULL; | |
151 | } | |
152 | } | |
153 | ||
154 | /** note: exit status only available after destruction */ | |
155 | void outpipebuf::store_exit_status(bool *_status_set, int *_exit_status) | |
156 | { | |
157 | status_set = _status_set; | |
158 | exit_status = _exit_status; | |
159 | } | |
160 | ||
161 | outpipebuf::int_type outpipebuf::overflow(int_type c) | |
162 | { | |
163 | if (c != EOF) | |
164 | { | |
165 | if (fputc(c,pipe)==EOF) | |
166 | return EOF; | |
167 | } | |
168 | return c; | |
169 | } | |
170 | ||
171 | std::streamsize outpipebuf::xsputn(const char* s, std::streamsize num) | |
172 | { | |
173 | return fwrite(s,num,1,pipe); | |
174 | } |