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Mitigated race condition of SYSTEM,EXEC child processes

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This commit is contained in:
Gerhard Rieger 2020-12-28 11:10:03 +01:00
parent 2e0b0a0eff
commit f34e8a4dc1
5 changed files with 45 additions and 55 deletions

4
xiosigchld.c
View file

@ -11,6 +11,7 @@
/*!! with socat, at most 4 exec children exist */
pid_t diedunknown[NUMUNKNOWN]; /* children that died before they were registered */
int statunknown[NUMUNKNOWN]; /* exit state of unknown dead child */
size_t nextunknown;
@ -120,7 +121,8 @@ void childdied(int signum) {
if (nextunknown == NUMUNKNOWN) {
nextunknown = 0;
}
diedunknown[nextunknown++] = pid;
diedunknown[nextunknown] = pid;
statunknown[nextunknown++] = WEXITSTATUS(status);
Debug1("saving pid in diedunknown"F_Zu,
nextunknown/*sic, for compatibility*/);
}