1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
#include "shell_manager.hh"
#include "debug.hh"
#include <cstring>
#include <sys/types.h>
#include <sys/wait.h>
namespace Kakoune
{
String env_var_regex(R"(\$\{kak_(\w+)[^}]*\}|\$kak_(\w+))");
ShellManager::ShellManager()
: m_regex(env_var_regex.begin(), env_var_regex.end())
{
}
String ShellManager::eval(const String& cmdline, const Context& context,
const memoryview<String>& params,
const EnvVarMap& env_vars)
{
return pipe("", cmdline, context, params, env_vars);
}
String ShellManager::pipe(const String& input,
const String& cmdline, const Context& context,
const memoryview<String>& params,
const EnvVarMap& env_vars)
{
int write_pipe[2]; // child stdin
int read_pipe[2]; // child stdout
int error_pipe[2]; // child stderr
::pipe(write_pipe);
::pipe(read_pipe);
::pipe(error_pipe);
String output;
if (pid_t pid = fork())
{
close(write_pipe[0]);
close(read_pipe[1]);
close(error_pipe[1]);
memoryview<char> data = input.data();
write(write_pipe[1], data.pointer(), data.size());
close(write_pipe[1]);
char buffer[1024];
while (size_t size = read(read_pipe[0], buffer, 1024))
{
if (size == -1)
break;
output += String(buffer, buffer+size);
}
close(read_pipe[0]);
String errorout;
while (size_t size = read(error_pipe[0], buffer, 1024))
{
if (size == -1)
break;
errorout += String(buffer, buffer+size);
}
close(error_pipe[0]);
if (not errorout.empty())
{
write_debug("\nshell stderr: <<<\n" + errorout + ">>>\n");
}
waitpid(pid, NULL, 0);
}
else try
{
close(write_pipe[1]);
close(read_pipe[0]);
close(error_pipe[0]);
dup2(read_pipe[1], 1); close(read_pipe[1]);
dup2(error_pipe[1], 2); close(error_pipe[1]);
dup2(write_pipe[0], 0); close(write_pipe[0]);
boost::regex_iterator<String::iterator> it(cmdline.begin(), cmdline.end(), m_regex);
boost::regex_iterator<String::iterator> end;
while (it != end)
{
auto& match = *it;
String name;
if (match[1].matched)
name = String(match[1].first, match[1].second);
else if (match[2].matched)
name = String(match[2].first, match[2].second);
else
assert(false);
assert(name.length() > 0);
auto local_var = env_vars.find(name);
if (local_var != env_vars.end())
setenv(("kak_" + name).c_str(), local_var->second.c_str(), 1);
else
{
auto env_var = std::find_if(
m_env_vars.begin(), m_env_vars.end(),
[&](const std::pair<Regex, EnvVarRetriever>& pair)
{ return boost::regex_match(name.begin(), name.end(),
pair.first); });
if (env_var != m_env_vars.end())
{
String value = env_var->second(name, context);
setenv(("kak_" + name).c_str(), value.c_str(), 1);
}
}
++it;
}
std::vector<const char*> execparams = { "sh", "-c", cmdline.c_str() };
if (not params.empty())
execparams.push_back("sh");
for (auto& param : params)
execparams.push_back(param.c_str());
execparams.push_back(NULL);
execvp("sh", (char* const*)execparams.data());
exit(-1);
}
catch (...) { exit(-1); }
return output;
}
void ShellManager::register_env_var(const String& regex,
EnvVarRetriever retriever)
{
m_env_vars.push_back({ Regex(regex.begin(), regex.end()), std::move(retriever) });
}
}
|
