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
|
// SPDX-License-Identifier: GPL-2.0-or-later
#include "execute.hpp"
#include <vector>
#include <cstdlib>
#include <cstring>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
namespace teg
{
namespace
{
// Little RAII helper to not let any dangling pointers hang around
struct ArgsHolder {
ArgsHolder(char const*const* cargs, std::size_t arg_count)
: args{arg_count, nullptr}
{
for(std::size_t i=0; i<arg_count; i++) {
if(nullptr != cargs[i]) {
args[i] = strdup(cargs[i]);
} else {
args[i] = nullptr;
break;
}
}
}
~ArgsHolder()
{
for(char *p: args) {
free(p);
}
}
std::vector<char*> args;
};
}
bool execute_program(const char * const *prog_and_args, std::size_t arg_count)
{
ArgsHolder holder{prog_and_args, arg_count};
auto *const exec_fn = (prog_and_args[0][0] == '/')
? execv
: execvp;
exec_fn(holder.args[0], holder.args.data());
return false;
}
std::filesystem::path binary_path()
{
return std::filesystem::read_symlink("/proc/self/exe");
}
std::filesystem::path program_directory()
{
return binary_path().parent_path();
}
std::filesystem::path installation_directory()
{
return binary_path().parent_path().parent_path();
}
}
|
