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Make Process do prctl(PR_SET_PDEATHSIG) 

This means that nanosm managed process will also predictably die if nanosm is killed.
This commit is contained in:
Lily Tsuru 2024-02-02 20:37:34 -05:00
parent bc530fe8a2
commit 0a0ab0703a
1 changed files with 7 additions and 0 deletions
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7
src/Process.cpp
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@ -3,6 +3,7 @@
#include <linux/sched.h> #include <linux/sched.h>
#include <sched.h> #include <sched.h>
#include <signal.h> #include <signal.h>
#include <sys/prctl.h>
#include <sys/types.h> #include <sys/types.h>
#include "WordExp.hpp" #include "WordExp.hpp"
@ -49,6 +50,12 @@ namespace nanosm {
for(usize i = 0; i < exp.words.size(); ++i) for(usize i = 0; i < exp.words.size(); ++i)
argv[i] = exp.words[i].data(); argv[i] = exp.words[i].data();
// Ensure that if nanosm (the parent) dies, we die along with it
if(prctl(PR_SET_PDEATHSIG, SIGTERM) == -1) {
perror("Process pre-exec: prctl(PR_SET_PDEATHSIG)");
exit(1);
}
exit(execvp(exp.words[0].data(), argv.data())); exit(execvp(exp.words[0].data(), argv.data()));
} else { } else {
// Parent: monitor the pidfd by adding ourselves to the event loop now // Parent: monitor the pidfd by adding ourselves to the event loop now