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/* Copyright (C) 2017 Jakob Kreuze, All Rights Reserved.
This file is part of Hypodermic.
Hypodermic is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
Hypodermic is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with Hypodermic. If not, see <http://www.gnu.org/licenses/>. */
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <stddef.h>
int attach(int pid) {
if ((ptrace(PTRACE_ATTACH, pid, NULL, NULL)) < 0) {
return -1;
}
waitpid(pid, NULL, WUNTRACED);
return 0;
}
int detach(int pid) {
return ptrace(PTRACE_DETACH, pid, NULL, NULL) < 0;
}
int cont(int pid) {
int s;
if ((ptrace(PTRACE_CONT, pid, NULL, NULL)) < 0) {
return -1;
}
while (!WIFSTOPPED(s)) {
waitpid(pid, &s, WNOHANG);
}
return 0;
}
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