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Merge branch 'errors-phase-2' of https://github.com/bburdette/nix

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This commit is contained in:
Eelco Dolstra 2020-06-15 11:46:31 +02:00
commit 7a77762961
81 changed files with 1857 additions and 1010 deletions
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92
src/libutil/util.cc
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@ -40,24 +40,6 @@ extern char * * environ;
namespace nix {
const std::string nativeSystem = SYSTEM;
BaseError & BaseError::addPrefix(const FormatOrString & fs)
{
prefix_ = fs.s + prefix_;
return *this;
}
std::string SysError::addErrno(const std::string & s)
{
errNo = errno;
return s + ": " + strerror(errNo);
}
std::optional<std::string> getEnv(const std::string & key)
{
char * value = getenv(key.c_str());
@ -129,7 +111,7 @@ Path canonPath(const Path & path, bool resolveSymlinks)
string s;
if (path[0] != '/')
throw Error(format("not an absolute path: '%1%'") % path);
throw Error("not an absolute path: '%1%'", path);
string::const_iterator i = path.begin(), end = path.end();
string temp;
@ -165,7 +147,7 @@ Path canonPath(const Path & path, bool resolveSymlinks)
the symlink target might contain new symlinks). */
if (resolveSymlinks && isLink(s)) {
if (++followCount >= maxFollow)
throw Error(format("infinite symlink recursion in path '%1%'") % path);
throw Error("infinite symlink recursion in path '%1%'", path);
temp = absPath(readLink(s), dirOf(s))
+ string(i, end);
i = temp.begin(); /* restart */
@ -226,7 +208,7 @@ struct stat lstat(const Path & path)
{
struct stat st;
if (lstat(path.c_str(), &st))
throw SysError(format("getting status of '%1%'") % path);
throw SysError("getting status of '%1%'", path);
return st;
}
@ -238,7 +220,7 @@ bool pathExists(const Path & path)
res = lstat(path.c_str(), &st);
if (!res) return true;
if (errno != ENOENT && errno != ENOTDIR)
throw SysError(format("getting status of %1%") % path);
throw SysError("getting status of %1%", path);
return false;
}
@ -286,7 +268,7 @@ DirEntries readDirectory(DIR *dir, const Path & path)
#endif
);
}
if (errno) throw SysError(format("reading directory '%1%'") % path);
if (errno) throw SysError("reading directory '%1%'", path);
return entries;
}
@ -294,7 +276,7 @@ DirEntries readDirectory(DIR *dir, const Path & path)
DirEntries readDirectory(const Path & path)
{
AutoCloseDir dir(opendir(path.c_str()));
if (!dir) throw SysError(format("opening directory '%1%'") % path);
if (!dir) throw SysError("opening directory '%1%'", path);
return readDirectory(dir.get(), path);
}
@ -324,7 +306,7 @@ string readFile(const Path & path)
{
AutoCloseFD fd = open(path.c_str(), O_RDONLY | O_CLOEXEC);
if (!fd)
throw SysError(format("opening file '%1%'") % path);
throw SysError("opening file '%1%'", path);
return readFile(fd.get());
}
@ -332,7 +314,8 @@ string readFile(const Path & path)
void readFile(const Path & path, Sink & sink)
{
AutoCloseFD fd = open(path.c_str(), O_RDONLY | O_CLOEXEC);
if (!fd) throw SysError("opening file '%s'", path);
if (!fd)
throw SysError("opening file '%s'", path);
drainFD(fd.get(), sink);
}
@ -341,7 +324,7 @@ void writeFile(const Path & path, const string & s, mode_t mode)
{
AutoCloseFD fd = open(path.c_str(), O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, mode);
if (!fd)
throw SysError(format("opening file '%1%'") % path);
throw SysError("opening file '%1%'", path);
writeFull(fd.get(), s);
}
@ -350,7 +333,7 @@ void writeFile(const Path & path, Source & source, mode_t mode)
{
AutoCloseFD fd = open(path.c_str(), O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, mode);
if (!fd)
throw SysError(format("opening file '%1%'") % path);
throw SysError("opening file '%1%'", path);
std::vector<unsigned char> buf(64 * 1024);
@ -400,7 +383,7 @@ static void _deletePath(int parentfd, const Path & path, unsigned long long & by
struct stat st;
if (fstatat(parentfd, name.c_str(), &st, AT_SYMLINK_NOFOLLOW) == -1) {
if (errno == ENOENT) return;
throw SysError(format("getting status of '%1%'") % path);
throw SysError("getting status of '%1%'", path);
}
if (!S_ISDIR(st.st_mode) && st.st_nlink == 1)
@ -411,15 +394,15 @@ static void _deletePath(int parentfd, const Path & path, unsigned long long & by
const auto PERM_MASK = S_IRUSR | S_IWUSR | S_IXUSR;
if ((st.st_mode & PERM_MASK) != PERM_MASK) {
if (fchmodat(parentfd, name.c_str(), st.st_mode | PERM_MASK, 0) == -1)
throw SysError(format("chmod '%1%'") % path);
throw SysError("chmod '%1%'", path);
}
int fd = openat(parentfd, path.c_str(), O_RDONLY);
if (!fd)
throw SysError(format("opening directory '%1%'") % path);
throw SysError("opening directory '%1%'", path);
AutoCloseDir dir(fdopendir(fd));
if (!dir)
throw SysError(format("opening directory '%1%'") % path);
throw SysError("opening directory '%1%'", path);
for (auto & i : readDirectory(dir.get(), path))
_deletePath(dirfd(dir.get()), path + "/" + i.name, bytesFreed);
}
@ -427,7 +410,7 @@ static void _deletePath(int parentfd, const Path & path, unsigned long long & by
int flags = S_ISDIR(st.st_mode) ? AT_REMOVEDIR : 0;
if (unlinkat(parentfd, name.c_str(), flags) == -1) {
if (errno == ENOENT) return;
throw SysError(format("cannot unlink '%1%'") % path);
throw SysError("cannot unlink '%1%'", path);
}
}
@ -443,7 +426,7 @@ static void _deletePath(const Path & path, unsigned long long & bytesFreed)
// for backwards compatibility.
if (errno == ENOENT) return;
throw SysError(format("opening directory '%1%'") % path);
throw SysError("opening directory '%1%'", path);
}
_deletePath(dirfd.get(), path, bytesFreed);
@ -497,12 +480,12 @@ Path createTempDir(const Path & tmpRoot, const Path & prefix,
"wheel", then "tar" will fail to unpack archives that
have the setgid bit set on directories. */
if (chown(tmpDir.c_str(), (uid_t) -1, getegid()) != 0)
throw SysError(format("setting group of directory '%1%'") % tmpDir);
throw SysError("setting group of directory '%1%'", tmpDir);
#endif
return tmpDir;
}
if (errno != EEXIST)
throw SysError(format("creating directory '%1%'") % tmpDir);
throw SysError("creating directory '%1%'", tmpDir);
}
}
@ -584,15 +567,15 @@ Paths createDirs(const Path & path)
if (lstat(path.c_str(), &st) == -1) {
created = createDirs(dirOf(path));
if (mkdir(path.c_str(), 0777) == -1 && errno != EEXIST)
throw SysError(format("creating directory '%1%'") % path);
throw SysError("creating directory '%1%'", path);
st = lstat(path);
created.push_back(path);
}
if (S_ISLNK(st.st_mode) && stat(path.c_str(), &st) == -1)
throw SysError(format("statting symlink '%1%'") % path);
throw SysError("statting symlink '%1%'", path);
if (!S_ISDIR(st.st_mode)) throw Error(format("'%1%' is not a directory") % path);
if (!S_ISDIR(st.st_mode)) throw Error("'%1%' is not a directory", path);
return created;
}
@ -601,7 +584,7 @@ Paths createDirs(const Path & path)
void createSymlink(const Path & target, const Path & link)
{
if (symlink(target.c_str(), link.c_str()))
throw SysError(format("creating symlink from '%1%' to '%2%'") % link % target);
throw SysError("creating symlink from '%1%' to '%2%'", link, target);
}
@ -618,7 +601,7 @@ void replaceSymlink(const Path & target, const Path & link)
}
if (rename(tmp.c_str(), link.c_str()) != 0)
throw SysError(format("renaming '%1%' to '%2%'") % tmp % link);
throw SysError("renaming '%1%' to '%2%'", tmp, link);
break;
}
@ -723,7 +706,7 @@ AutoDelete::~AutoDelete()
deletePath(path);
else {
if (remove(path.c_str()) == -1)
throw SysError(format("cannot unlink '%1%'") % path);
throw SysError("cannot unlink '%1%'", path);
}
}
} catch (...) {
@ -789,7 +772,7 @@ void AutoCloseFD::close()
if (fd != -1) {
if (::close(fd) == -1)
/* This should never happen. */
throw SysError(format("closing file descriptor %1%") % fd);
throw SysError("closing file descriptor %1%", fd);
}
}
@ -862,7 +845,7 @@ int Pid::kill()
{
assert(pid != -1);
debug(format("killing process %1%") % pid);
debug("killing process %1%", pid);
/* Send the requested signal to the child. If it has its own
process group, send the signal to every process in the child
@ -874,7 +857,7 @@ int Pid::kill()
#if __FreeBSD__ || __APPLE__
if (errno != EPERM || ::kill(pid, 0) != 0)
#endif
printError((SysError("killing process %d", pid).msg()));
logError(SysError("killing process %d", pid).info());
}
return wait();
@ -920,7 +903,7 @@ pid_t Pid::release()
void killUser(uid_t uid)
{
debug(format("killing all processes running under uid '%1%'") % uid);
debug("killing all processes running under uid '%1%'", uid);
assert(uid != 0); /* just to be safe... */
@ -949,7 +932,7 @@ void killUser(uid_t uid)
#endif
if (errno == ESRCH) break; /* no more processes */
if (errno != EINTR)
throw SysError(format("cannot kill processes for uid '%1%'") % uid);
throw SysError("cannot kill processes for uid '%1%'", uid);
}
_exit(0);
@ -957,7 +940,7 @@ void killUser(uid_t uid)
int status = pid.wait();
if (status != 0)
throw Error(format("cannot kill processes for uid '%1%': %2%") % uid % statusToString(status));
throw Error("cannot kill processes for uid '%1%': %2%", uid, statusToString(status));
/* !!! We should really do some check to make sure that there are
no processes left running under `uid', but there is no portable
@ -1351,7 +1334,7 @@ void ignoreException()
try {
throw;
} catch (std::exception & e) {
printError(format("error (ignored): %1%") % e.what());
printError("error (ignored): %1%", e.what());
}
}
@ -1464,17 +1447,6 @@ string base64Decode(std::string_view s)
}
void callFailure(const std::function<void(std::exception_ptr exc)> & failure, std::exception_ptr exc)
{
try {
failure(exc);
} catch (std::exception & e) {
printError(format("uncaught exception: %s") % e.what());
abort();
}
}
static Sync<std::pair<unsigned short, unsigned short>> windowSize{{0, 0}};