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/*
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* lftp - file transfer program
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*
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* Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <errno.h>
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#include "SysCmdJob.h"
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#include "SignalHook.h"
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#include "misc.h"
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#define super Job
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SysCmdJob::SysCmdJob(const char *c)
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: cmd(c)
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{
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}
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void SysCmdJob::PrepareToDie()
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{
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Bg();
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AcceptSig(SIGTERM);
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if(w)
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w.borrow()->Auto();
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super::PrepareToDie();
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}
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SysCmdJob::~SysCmdJob() {}
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int SysCmdJob::Do()
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{
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int m=STALL;
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if(w)
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return m;
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const char *shell=getenv("SHELL");
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if(!shell)
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shell="/bin/sh";
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ProcWait::Signal(false);
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pid_t pid;
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fflush(stderr);
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switch(pid=fork())
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{
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case(0): /* child */
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setpgid(0,0);
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kill(getpid(),SIGSTOP);
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SignalHook::RestoreAll();
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if(cmd)
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execlp(shell,basename_ptr(shell),"-c",cmd.get(),NULL);
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else
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execlp(shell,basename_ptr(shell),NULL);
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fprintf(stderr,_("execlp(%s) failed: %s\n"),shell,strerror(errno));
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fflush(stderr);
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_exit(1);
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case(-1): /* error */
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TimeoutS(1); // wait a second and retry
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goto out;
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}
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/* parent */
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int info;
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waitpid(pid,&info,WUNTRACED); // wait until the process stops
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w=new ProcWait(pid);
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fg_data=new FgData(pid,fg);
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m=MOVED;
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out:
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ProcWait::Signal(true);
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return m;
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}
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int SysCmdJob::AcceptSig(int sig)
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{
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if(!w)
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{
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if(sig==SIGINT)
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return WANTDIE;
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return STALL;
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}
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w->Kill(sig);
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if(sig!=SIGCONT)
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AcceptSig(SIGCONT); // for the case of stopped process
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return MOVED;
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}
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