util.{hh,cc}: Split out current-process.{hh,cc}

Change-Id: I77095b9d37e85310075bada7a076ccd482c28e47

1 files changed, 1 insertions, 86 deletions

diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index 702db2afb..7f9413f8d 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -1,5 +1,6 @@
 #include "util.hh"
 #include "processes.hh"
+#include "current-process.hh"
 
 #include "sync.hh"
 #include "finally.hh"
@@ -148,59 +149,11 @@ Path createNixStateDir()
 }
 
 
-std::optional<Path> getSelfExe()
-{
-    static auto cached = []() -> std::optional<Path>
-    {
-        #if __linux__
-        return readLink("/proc/self/exe");
-        #elif __APPLE__
-        char buf[1024];
-        uint32_t size = sizeof(buf);
-        if (_NSGetExecutablePath(buf, &size) == 0)
-            return buf;
-        else
-            return std::nullopt;
-        #else
-        return std::nullopt;
-        #endif
-    }();
-    return cached;
-}
 
 
 
 //////////////////////////////////////////////////////////////////////
 
-unsigned int getMaxCPU()
-{
-    #if __linux__
-    try {
-        auto cgroupFS = getCgroupFS();
-        if (!cgroupFS) return 0;
-
-        auto cgroups = getCgroups("/proc/self/cgroup");
-        auto cgroup = cgroups[""];
-        if (cgroup == "") return 0;
-
-        auto cpuFile = *cgroupFS + "/" + cgroup + "/cpu.max";
-
-        auto cpuMax = readFile(cpuFile);
-        auto cpuMaxParts = tokenizeString<std::vector<std::string>>(cpuMax, " \n");
-
-        if (cpuMaxParts.size() != 2) {
-            return 0;
-        }
-
-        auto quota = cpuMaxParts[0];
-        auto period = cpuMaxParts[1];
-        if (quota != "max")
-                return std::ceil(std::stoi(quota) / std::stof(period));
-    } catch (Error &) { ignoreException(lvlDebug); }
-    #endif
-
-    return 0;
-}
 
 //////////////////////////////////////////////////////////////////////
 
@@ -454,28 +407,6 @@ std::pair<std::string_view, std::string_view> getLine(std::string_view s)
 //////////////////////////////////////////////////////////////////////
 
 
-rlim_t savedStackSize = 0;
-
-void setStackSize(rlim_t stackSize)
-{
-    struct rlimit limit;
-    if (getrlimit(RLIMIT_STACK, &limit) == 0 && limit.rlim_cur < stackSize) {
-        savedStackSize = limit.rlim_cur;
-        limit.rlim_cur = std::min(stackSize, limit.rlim_max);
-        if (setrlimit(RLIMIT_STACK, &limit) != 0) {
-            logger->log(
-                lvlError,
-                HintFmt(
-                    "Failed to increase stack size from %1% to %2% (maximum allowed stack size: %3%): %4%",
-                    savedStackSize,
-                    stackSize,
-                    limit.rlim_max,
-                    std::strerror(errno)
-                ).str()
-            );
-        }
-    }
-}
 
 #if __linux__
 static AutoCloseFD fdSavedMountNamespace;
@@ -528,22 +459,6 @@ void unshareFilesystem()
 #endif
 }
 
-void restoreProcessContext(bool restoreMounts)
-{
-    restoreSignals();
-    if (restoreMounts) {
-        restoreMountNamespace();
-    }
-
-    if (savedStackSize) {
-        struct rlimit limit;
-        if (getrlimit(RLIMIT_STACK, &limit) == 0) {
-            limit.rlim_cur = savedStackSize;
-            setrlimit(RLIMIT_STACK, &limit);
-        }
-    }
-}
-
 AutoCloseFD createUnixDomainSocket()
 {
     AutoCloseFD fdSocket{socket(PF_UNIX, SOCK_STREAM