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#pragma once
#include "acconfig.h"
#ifdef HAVE_SYS_PRCTL_H
#include <iostream>
#include <sys/prctl.h>
#include "common/errno.h"
class PrCtl {
int saved_state = -1;
static int get_dumpable() {
int r = prctl(PR_GET_DUMPABLE);
if (r == -1) {
r = errno;
std::cerr << "warning: unable to get dumpable flag: " << cpp_strerror(r)
<< std::endl;
}
return r;
}
static int set_dumpable(bool new_state) {
int r = prctl(PR_SET_DUMPABLE, new_state);
if (r) {
r = -errno;
std::cerr << "warning: unable to " << (new_state ? "set" : "unset")
<< " dumpable flag: " << cpp_strerror(r)
<< std::endl;
}
return r;
}
public:
PrCtl(int new_state = 0) {
int r = get_dumpable();
if (r == -1) {
return;
}
if (r != new_state) {
if (!set_dumpable(new_state)) {
saved_state = r;
}
}
}
~PrCtl() {
if (saved_state < 0) {
return;
}
set_dumpable(saved_state);
}
};
#else
#ifdef RLIMIT_CORE
#include <sys/resource.h>
#include <iostream>
#include <sys/resource.h>
#include "common/errno.h"
class PrCtl {
rlimit saved_lim;
static int get_dumpable(rlimit* saved) {
int r = getrlimit(RLIMIT_CORE, saved);
if (r) {
r = errno;
std::cerr << "warning: unable to getrlimit(): " << cpp_strerror(r)
<< std::endl;
}
return r;
}
static void set_dumpable(const rlimit& rlim) {
int r = setrlimit(RLIMIT_CORE, &rlim);
if (r) {
r = -errno;
std::cerr << "warning: unable to setrlimit(): " << cpp_strerror(r)
<< std::endl;
}
}
public:
PrCtl(int new_state = 0) {
int r = get_dumpable(&saved_lim);
if (r == -1) {
return;
}
rlimit new_lim;
if (new_state) {
new_lim.rlim_cur = saved_lim.rlim_max;
} else {
new_lim.rlim_cur = new_lim.rlim_max = 0;
}
if (new_lim.rlim_cur == saved_lim.rlim_cur) {
return;
}
set_dumpable(new_lim);
}
~PrCtl() {
set_dumpable(saved_lim);
}
};
#else
struct PrCtl {
// to silence the Wunused-variable warning
PrCtl() {}
};
#endif // RLIMIT_CORE
#endif
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