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0c67777396
For example, instead of doing
#include "nix/store-config.hh"
#include "nix/derived-path.hh"
Now do
#include "nix/store/config.hh"
#include "nix/store/derived-path.hh"
This was originally planned in the issue, and also recent requested by
Eelco.
Most of the change is purely mechanical. There is just one small
additional issue. See how, in the example above, we took this
opportunity to also turn `<comp>-config.hh` into `<comp>/config.hh`.
Well, there was already a `nix/util/config.{cc,hh}`. Even though there
is not a public configuration header for libutil (which also would be
called `nix/util/config.{cc,hh}`) that's still confusing, To avoid any
such confusion, we renamed that to `nix/util/configuration.{cc,hh}`.
Finally, note that the libflake headers already did this, so we didn't
need to do anything to them. We wouldn't want to mistakenly get
`nix/flake/flake/flake.hh`!
Progress on #7876
(cherry picked from commit cc24766fa6)
68 lines
2 KiB
C++
68 lines
2 KiB
C++
#include "nix/util/util.hh"
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#include "nix/util/users.hh"
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#include "nix/util/environment-variables.hh"
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#include "nix/util/file-system.hh"
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#include <pwd.h>
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#include <sys/types.h>
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#include <unistd.h>
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namespace nix {
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namespace fs { using namespace std::filesystem; }
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std::string getUserName()
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{
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auto pw = getpwuid(geteuid());
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std::string name = pw ? pw->pw_name : getEnv("USER").value_or("");
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if (name.empty())
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throw Error("cannot figure out user name");
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return name;
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}
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Path getHomeOf(uid_t userId)
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{
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std::vector<char> buf(16384);
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struct passwd pwbuf;
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struct passwd * pw;
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if (getpwuid_r(userId, &pwbuf, buf.data(), buf.size(), &pw) != 0
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|| !pw || !pw->pw_dir || !pw->pw_dir[0])
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throw Error("cannot determine user's home directory");
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return pw->pw_dir;
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}
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Path getHome()
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{
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static Path homeDir = []()
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{
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std::optional<std::string> unownedUserHomeDir = {};
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auto homeDir = getEnv("HOME");
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if (homeDir) {
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// Only use $HOME if doesn't exist or is owned by the current user.
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struct stat st;
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int result = stat(homeDir->c_str(), &st);
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if (result != 0) {
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if (errno != ENOENT) {
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warn("couldn't stat $HOME ('%s') for reason other than not existing ('%d'), falling back to the one defined in the 'passwd' file", *homeDir, errno);
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homeDir.reset();
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}
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} else if (st.st_uid != geteuid()) {
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unownedUserHomeDir.swap(homeDir);
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}
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}
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if (!homeDir) {
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homeDir = getHomeOf(geteuid());
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if (unownedUserHomeDir.has_value() && unownedUserHomeDir != homeDir) {
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warn("$HOME ('%s') is not owned by you, falling back to the one defined in the 'passwd' file ('%s')", *unownedUserHomeDir, *homeDir);
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}
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}
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return *homeDir;
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}();
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return homeDir;
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}
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bool isRootUser() {
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return getuid() == 0;
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}
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}
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