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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
#include "globals.hh"
#include "util.hh"
#include "archive.hh"
#include "args.hh"
#include <algorithm>
#include <map>
#include <thread>
#include <dlfcn.h>
namespace nix {
/* The default location of the daemon socket, relative to nixStateDir.
The socket is in a directory to allow you to control access to the
Nix daemon by setting the mode/ownership of the directory
appropriately. (This wouldn't work on the socket itself since it
must be deleted and recreated on startup.) */
#define DEFAULT_SOCKET_PATH "/daemon-socket/socket"
/* chroot-like behavior from Apple's sandbox */
#if __APPLE__
#define DEFAULT_ALLOWED_IMPURE_PREFIXES "/System/Library /usr/lib /dev /bin/sh"
#else
#define DEFAULT_ALLOWED_IMPURE_PREFIXES ""
#endif
Settings settings;
Settings::Settings()
: Config({})
, nixPrefix(NIX_PREFIX)
, nixStore(canonPath(getEnv("NIX_STORE_DIR", getEnv("NIX_STORE", NIX_STORE_DIR))))
, nixDataDir(canonPath(getEnv("NIX_DATA_DIR", NIX_DATA_DIR)))
, nixLogDir(canonPath(getEnv("NIX_LOG_DIR", NIX_LOG_DIR)))
, nixStateDir(canonPath(getEnv("NIX_STATE_DIR", NIX_STATE_DIR)))
, nixConfDir(canonPath(getEnv("NIX_CONF_DIR", NIX_CONF_DIR)))
, nixLibexecDir(canonPath(getEnv("NIX_LIBEXEC_DIR", NIX_LIBEXEC_DIR)))
, nixBinDir(canonPath(getEnv("NIX_BIN_DIR", NIX_BIN_DIR)))
, nixDaemonSocketFile(canonPath(nixStateDir + DEFAULT_SOCKET_PATH))
{
buildUsersGroup = getuid() == 0 ? "nixbld" : "";
lockCPU = getEnv("NIX_AFFINITY_HACK", "1") == "1";
caFile = getEnv("NIX_SSL_CERT_FILE", getEnv("SSL_CERT_FILE", ""));
if (caFile == "") {
for (auto & fn : {"/etc/ssl/certs/ca-certificates.crt", "/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt"})
if (pathExists(fn)) {
caFile = fn;
break;
}
}
/* Backwards compatibility. */
auto s = getEnv("NIX_REMOTE_SYSTEMS");
if (s != "") {
Strings ss;
for (auto & p : tokenizeString<Strings>(s, ":"))
ss.push_back("@" + p);
builders = concatStringsSep(" ", ss);
}
#if defined(__linux__) && defined(SANDBOX_SHELL)
sandboxPaths = tokenizeString<StringSet>("/bin/sh=" SANDBOX_SHELL);
#endif
allowedImpureHostPrefixes = tokenizeString<StringSet>(DEFAULT_ALLOWED_IMPURE_PREFIXES);
}
void Settings::loadConfFile()
{
applyConfigFile(nixConfDir + "/nix.conf");
/* We only want to send overrides to the daemon, i.e. stuff from
~/.nix/nix.conf or the command line. */
resetOverriden();
applyConfigFile(getConfigDir() + "/nix/nix.conf");
}
void Settings::set(const string & name, const string & value)
{
Config::set(name, value);
}
unsigned int Settings::getDefaultCores()
{
return std::max(1U, std::thread::hardware_concurrency());
}
const string nixVersion = PACKAGE_VERSION;
template<> void BaseSetting<SandboxMode>::set(const std::string & str)
{
if (str == "true") value = smEnabled;
else if (str == "relaxed") value = smRelaxed;
else if (str == "false") value = smDisabled;
else throw UsageError("option '%s' has invalid value '%s'", name, str);
}
template<> std::string BaseSetting<SandboxMode>::to_string()
{
if (value == smEnabled) return "true";
else if (value == smRelaxed) return "relaxed";
else if (value == smDisabled) return "false";
else abort();
}
template<> void BaseSetting<SandboxMode>::toJSON(JSONPlaceholder & out)
{
AbstractSetting::toJSON(out);
}
template<> void BaseSetting<SandboxMode>::convertToArg(Args & args, const std::string & category)
{
args.mkFlag()
.longName(name)
.description("Enable sandboxing.")
.handler([=](std::vector<std::string> ss) { override(smEnabled); })
.category(category);
args.mkFlag()
.longName("no-" + name)
.description("Disable sandboxing.")
.handler([=](std::vector<std::string> ss) { override(smDisabled); })
.category(category);
args.mkFlag()
.longName("relaxed-" + name)
.description("Enable sandboxing, but allow builds to disable it.")
.handler([=](std::vector<std::string> ss) { override(smRelaxed); })
.category(category);
}
void MaxBuildJobsSetting::set(const std::string & str)
{
if (str == "auto") value = std::max(1U, std::thread::hardware_concurrency());
else if (!string2Int(str, value))
throw UsageError("configuration setting '%s' should be 'auto' or an integer", name);
}
void initPlugins()
{
for (const auto & pluginFile : settings.pluginFiles.get()) {
/* handle is purposefully leaked as there may be state in the
DSO needed by the action of the plugin. */
void *handle =
dlopen(pluginFile.c_str(), RTLD_LAZY | RTLD_LOCAL);
if (!handle)
throw Error(format("could not dynamically open plugin file '%1%': %2%") % pluginFile % dlerror());
}
}
}
|
