/usr/include/wvstreams/wvsubproc.h is in libwvstreams-dev 4.6.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | /* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 1997-2002 Net Integration Technologies, Inc.
*
* A class for reliably starting/stopping subprocesses.
*
* We want to avoid calling system(), since it uses the shell (and
* thus has strange parsing weirdness, environment variable changes,
* and so on). Plus calling the shell when we need to is just slow.
*
* On the other hand, we want handy features like the ability to wait
* for our child process to die, and the ability to kill it if it
* doesn't (without having to use "killall").
*
* By using setsid(), we also deal with strange situations like
* scripts which launch other programs. stop() and kill() will kill
* them all. (If you don't want that, use stop_primary() and
* kill_primary().)
*/
#ifndef __WVSUBPROC_H
#define __WVSUBPROC_H
#include "wvstringlist.h"
#include <stdarg.h>
#include <signal.h>
#include <time.h>
class WvSubProc
{
public:
DeclareWvList(pid_t);
pid_tList old_pids;
pid_t pid;
bool running;
int estatus;
WvString pidfile, last_cmd, app;
WvStringList last_args, env;
WvSubProc()
{ init(); }
WvSubProc(const char cmd[], const char * const *argv)
{ init(); startv(cmd, argv); }
virtual ~WvSubProc();
private:
void init();
int _startv(const char cmd[], const char * const *argv);
int memlimit;
public:
void prepare(const char cmd[], ...);
void preparev(const char cmd[], va_list ap);
void preparev(const char cmd[], const char * const *argv);
void preparev(const char cmd[], WvStringList &);
// launch a subprocess, which will be owned by this object.
int start(const char cmd[], ...);
int startv(const char cmd[], const char * const *argv);
virtual int start_again();
virtual int fork(int *waitfd);
// stop (kill -TERM or -KILL as necessary) the subprocess and
// all its children.
virtual void stop(time_t msec_delay, bool kill_children = true);
// wait for the subprocess (and all its children) to die.
virtual void wait(time_t msec_delay, bool wait_children = true);
// figure out the pid from the /var/run pidfile
pid_t pidfile_pid();
/// Sets a limit on the number of megabytes of memory the subprocess will
// use
void setMemLimit(int megs) { memlimit = megs; }
// send a signal to the subprocess and all its children.
void kill(int sig);
// send a signal only to the main subprocess.
void kill_primary(int sig);
// suspend the process temporarily, or resume it.
virtual void suspend()
{ kill(SIGSTOP); }
virtual void resume()
{ kill(SIGCONT); }
};
DeclareWvList(WvSubProc);
#endif // __WVSUBPROC_H
|