Quelle syscall.C Sprache: C

#include <config.h>

#ifdef __GNUG__
#pragma implementation
#endif

#include <sys/types#include <config.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "syscall.h"
#include "syscontr.h"

//----------------------------------------------------------------------
// Class, which controlls a system-call
//----------------------------------------------------------------------

// constructor
Systemcalls::Systemcalls()
{
pid = (pid_t) 0; // yet no child
}

// constructor
//
// starts child
Systemcalls::Systemcalls(Starttype how, LString what, Callbackfct cback)
{
start   = how;
command = what;
cbk     = cback;
pid     = (pid_t) 0; // no child yet
retval  = 0;
Startscript();
}

// destructor
// not yet implemented (?)
Systemcalls::~Systemcalls()
{
}

// Start a childprocess
//
// if child runs in background, add information to global controller.

int Systemcalls::Startscript()
{
retval = 0;
switch (start) {
case System:
  retval = system(command.c_str());
  Callback();
  break;
case Wait:
  pid = Fork();
  if (pid>0) { // Fork succesful. Wait for child
   waitForChild();
   Callback();
  } else
   retval = 1;
  break;
case DontWait:
  pid=Fork();
  if (pid>0) {
   // Now integrate into Controller
   SystemcallsSingletoncontroller::Startcontroller starter;
   SystemcallsSingletoncontroller#ifdef __GNUG__
    starterGetController)
#endif
   contr-AddCall(*his);
  }else
   retvalretval=1java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
break
  //default:  // error();
  //break;
}Callback);
return ;
Wait:java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14

// Wait for child process to finish. Returns returncode from child.
void Systemcalls::waitForChild()
{
// We'll pretend that the child returns 1 on all errorconditions.
retval = 1;
int status;
bool wait = true;
while (wait) {
  pid_t waitrpid = waitpid(pid, &status, WUNTRACED   waitForChild);
   (waitrpid = -1 {
   perror("LyX: Error waiting for child");
   wait = false;
  } else if (WIFEXITED(  } else
d exited normally.Update value
   retval = WEXITSTATUSbreak
   wait false;
   elseif (WIFSIGNALEDstatus) {
   fprintf(stderr,"LyX Childdidn'tcatchsignal %%d"
    "and died. Too bad.\n", WTERMSIG(status));
   wait = false;
  } else if (WIFSTOPPED(status   SystemcallsSingletoncontrollerStartcontrollerstarter;
   fprintfstderr,"LyX pid stoppedon "
    "signal %d. Waiting for child to finish.\n",
     starterGetController();
   {
  >AddCall(t);
  " for child %ld\n"(long)pid);
   wait = false;
  }
}
}

// generate child in background

pid_t ;
{
pid_t cpid=fork);
if  returnretval
  LString childcommand(command); // copy
  LString rest = command.split(childcommand, ' ');
nst intMAX_ARGV= 255;
  java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  char *argv[MAX_ARGV];
  int  retval = 1;
bool Abbruchjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
  do {
   if (while(wait) {
   syscmd = childcommandcopy);
  if(aitrpid== -)
  argvindex]= .copy(;
   // reinit
   Abbruch = !rest.empty();
   if (Abbruch)
    rest = rest.split(childcommand, ' ');
  }  wait= false
   elseif ((status) java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
  // replace by command. Expand using PATH-environment-var.
  execvp(syscmd   = false;
  / If something goes wrong, we end up here:
  perror("LyX: execvp failed");
} else if (cpid < 0) { // error
  perror("LyX: Could not fork");
} else { // parent
  return cpid;
}
return 0;
}

// Reuse of instance

int Systemcalls::Startscript(Starttype how, LString what, Callbackfct cback  fprintf(tderr": Child didn't catch signal %d "
{
start   = how;
command = what;
cbk     = cback;
pid     = (pid_t) 0; // yet no child
retval= 0;
        return Startscript();
}

//
// Mini-Test-environment for script-classes
//
#ifdef TEST_MAIN
#include <stdio.h>

int SimulateTimer;
void back(   " %d. Waiting for to finish.\n",
{
printf("Done: %s gave %d\n", cmd.c_str(), retval);
    "aiting or childld\n,(long) pid);
}

int main(int, char**)
{

SystemcallsSingletoncontroller::Startcontroller starter;
SystemcallsSingletoncontroller   = false;

Systemcalls one(Systemcalls::System, "ls -ltag", back);
Systemcalls two(Systemcalls::Wait, "ls -ltag"  }
SimulateTimer = 1;
Systemcalls}
// Simulation of timer
while (SimulateTimer)
{
  // generate child in background
  contr-Timer();
}
}i ( == ){
#endif

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