File indexing completed on 2024-04-28 16:49:56

 /*
     SPDX-FileCopyrightText: 2007 Manolo Valdes <nolis71cu@gmail.com>
     SPDX-FileCopyrightText: 2010 Alex Hornung <ahornung@gmail.com>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "process.h"
 #include "processes_local_p.h"
 
 #include <KLocalizedString>
 
 #include <QSet>
 
 #include <err.h>
 #include <sched.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <sys/param.h>
 #include <sys/resource.h>
 #include <sys/resourcevar.h>
 #include <sys/sysctl.h>
 #include <sys/types.h>
 #include <sys/user.h>
 #include <unistd.h>
 
 #define PP(pp, field) ((pp)->kp_##field)
 #define LP(pp, field) ((pp)->kp_lwp.kl_##field)
 #define VP(pp, field) ((pp)->kp_vm_##field)
 
 namespace KSysGuard
 {
 class ProcessesLocal::Private
 {
 public:
     Private()
     {
     }
     ~Private()
     {
     }
     inline bool readProc(long pid, struct kinfo_proc *p);
     inline void readProcStatus(struct kinfo_proc *p, Process *process);
     inline void readProcStat(struct kinfo_proc *p, Process *process);
     inline void readProcStatm(struct kinfo_proc *p, Process *process);
     inline bool readProcCmdline(long pid, Process *process);
 };
 
 bool ProcessesLocal::Private::readProc(long pid, struct kinfo_proc *p)
 {
     int mib[4];
     size_t len;
 
     mib[0] = CTL_KERN;
     mib[1] = KERN_PROC;
     mib[2] = KERN_PROC_PID;
     mib[3] = pid;
 
     len = sizeof(struct kinfo_proc);
     if (sysctl(mib, 4, p, &len, NULL, 0) == -1 || !len)
         return false;
     return true;
 }
 
 void ProcessesLocal::Private::readProcStatus(struct kinfo_proc *p, Process *process)
 {
     process->setUid(0);
     process->setGid(0);
     process->setTracerpid(-1);
 
     process->setEuid(PP(p, uid));
     process->setUid(PP(p, ruid));
     process->setEgid(PP(p, svgid));
     process->setGid(PP(p, rgid));
     process->setName(QString(PP(p, comm)));
 }
 
 void ProcessesLocal::Private::readProcStat(struct kinfo_proc *p, Process *ps)
 {
     ps->setUserTime(LP(p, uticks) / 10000);
     ps->setSysTime((LP(p, sticks) + LP(p, iticks)) / 10000);
     ps->setNiceLevel(PP(p, nice));
     ps->setVmSize(VP(p, map_size) / 1024); /* convert to KiB */
     ps->setVmRSS(VP(p, prssize) * getpagesize() / 1024); /* convert to KiB */
 
     // "idle","run","sleep","stop","zombie"
     switch (LP(p, stat)) {
     case LSRUN:
         ps->setStatus(Process::Running);
         break;
     case LSSLEEP:
         ps->setStatus(Process::Sleeping);
         break;
     case LSSTOP:
         ps->setStatus(Process::Stopped);
         break;
     default:
         ps->setStatus(Process::OtherStatus);
         break;
     }
     if (PP(p, stat) == SZOMB)
         ps->setStatus(Process::Zombie);
 }
 
 void ProcessesLocal::Private::readProcStatm(struct kinfo_proc *p, Process *process)
 {
     process->setVmURSS(-1);
 }
 
 bool ProcessesLocal::Private::readProcCmdline(long pid, Process *process)
 {
     int mib[4];
     size_t buflen = 256;
     char buf[256];
 
     mib[0] = CTL_KERN;
     mib[1] = KERN_PROC;
     mib[2] = KERN_PROC_ARGS;
     mib[3] = pid;
 
     if (sysctl(mib, 4, buf, &buflen, NULL, 0) == -1 || (buflen == 0))
         return false;
     QString command = QString(buf);
 
     // cmdline separates parameters with the NULL character
     command.replace('\0', ' ');
     process->setCommand(command.trimmed());
 
     return true;
 }
 
 ProcessesLocal::ProcessesLocal()
     : d(new Private())
 {
 }
 
 long ProcessesLocal::getParentPid(long pid)
 {
     long long ppid = -1;
     struct kinfo_proc p;
 
     if (d->readProc(pid, &p))
         ppid = PP(&p, ppid);
 
     return ppid;
 }
 
 bool ProcessesLocal::updateProcessInfo(long pid, Process *process)
 {
     struct kinfo_proc p;
 
     if (!d->readProc(pid, &p)) {
         return false;
     }
 
     d->readProcStat(&p, process);
     d->readProcStatus(&p, process);
     d->readProcStatm(&p, process);
     if (!d->readProcCmdline(pid, process)) {
         return false;
     }
 
     return true;
 }
 
 QSet<long> ProcessesLocal::getAllPids()
 {
     QSet<long> pids;
     int mib[3];
     size_t len;
     size_t num;
     struct kinfo_proc *p;
 
     mib[0] = CTL_KERN;
     mib[1] = KERN_PROC;
     mib[2] = KERN_PROC_ALL;
     if (sysctl(mib, 3, NULL, &len, NULL, 0) == -1)
         return pids;
     if ((p = (kinfo_proc *)malloc(len)) == NULL)
         return pids;
     if (sysctl(mib, 3, p, &len, NULL, 0) == -1) {
         free(p);
         return pids;
     }
 
     for (num = 0; num < len / sizeof(struct kinfo_proc); num++) {
         long pid = PP((&p[num]), pid);
         long long ppid = PP((&p[num]), ppid);
 
         // skip all process with parent id = 0 but init
         if (ppid <= 0 && pid != 1)
             continue;
         pids.insert(pid);
     }
     free(p);
     return pids;
 }
 
 Processes::Error ProcessesLocal::sendSignal(long pid, int sig)
 {
     if (kill((pid_t)pid, sig)) {
         // Kill failed
         return Processes::Unknown;
     }
     return Processes::NoError;
 }
 
 Processes::Error ProcessesLocal::setNiceness(long pid, int priority)
 {
     if (setpriority(PRIO_PROCESS, pid, priority)) {
         // set niceness failed
         return Processes::Unknown;
     }
     return Processes::NoError;
 }
 
 Processes::Error ProcessesLocal::setScheduler(long pid, int priorityClass, int priority)
 {
     if (priorityClass == KSysGuard::Process::Other || priorityClass == KSysGuard::Process::Batch)
         priority = 0;
     if (pid <= 0)
         return Processes::InvalidPid; // check the parameters
     struct sched_param params;
     params.sched_priority = priority;
     bool success;
     switch (priorityClass) {
     case (KSysGuard::Process::Other):
         success = (sched_setscheduler(pid, SCHED_OTHER, &params) == 0);
         break;
     case (KSysGuard::Process::RoundRobin):
         success = (sched_setscheduler(pid, SCHED_RR, &params) == 0);
         break;
     case (KSysGuard::Process::Fifo):
         success = (sched_setscheduler(pid, SCHED_FIFO, &params) == 0);
         break;
 #ifdef SCHED_BATCH
     case (KSysGuard::Process::Batch):
         success = (sched_setscheduler(pid, SCHED_BATCH, &params) == 0);
         break;
 #endif
     }
     if (success) {
         return Processes::NoError;
     }
     return Processes::Unknown;
 }
 
 Processes::Error ProcessesLocal::setIoNiceness(long pid, int priorityClass, int priority)
 {
     return Processes::NotSupported; // Not yet supported
 }
 
 bool ProcessesLocal::supportsIoNiceness()
 {
     return false;
 }
 
 long long ProcessesLocal::totalPhysicalMemory()
 {
     size_t Total;
     size_t len;
 
     len = sizeof(Total);
     if (sysctlbyname("hw.physmem", &Total, &len, NULL, 0) == -1)
         return 0;
 
     Total *= getpagesize() / 1024;
     return Total;
 }
 
 ProcessesLocal::~ProcessesLocal()
 {
     delete d;
 }
 
 }