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drop privileges before changing process priority or sending signals

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- replaces uid check from d18e9a4895
This commit is contained in:
Michael Klein
2015-12-07 20:10:09 +01:00
parent 42b08f2233
commit ab3a7c2fa8
2 changed files with 14 additions and 11 deletions
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23
Process.c
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@ -513,16 +513,15 @@ void Process_toggleTag(Process* this) {
}
bool Process_setPriority(Process* this, int priority) {
if ( Process_getuid == 0 || Process_getuid == (int) this->st_uid ) {
int old_prio = getpriority(PRIO_PROCESS, this->pid);
int err = setpriority(PRIO_PROCESS, this->pid, priority);
if (err == 0 && old_prio != getpriority(PRIO_PROCESS, this->pid)) {
this->nice = priority;
}
return (err == 0);
uid_t euid = geteuid();
seteuid(getuid());
int old_prio = getpriority(PRIO_PROCESS, this->pid);
int err = setpriority(PRIO_PROCESS, this->pid, priority);
seteuid(euid);
if (err == 0 && old_prio != getpriority(PRIO_PROCESS, this->pid)) {
this->nice = priority;
}
else
return false;
return (err == 0);
}
bool Process_changePriorityBy(Process* this, size_t delta) {
@ -530,8 +529,10 @@ bool Process_changePriorityBy(Process* this, size_t delta) {
}
void Process_sendSignal(Process* this, size_t sgn) {
if ( Process_getuid == 0 || Process_getuid == (int) this->st_uid )
kill(this->pid, (int) sgn);
uid_t euid = geteuid();
seteuid(getuid());
kill(this->pid, (int) sgn);
seteuid(euid);
}
long Process_pidCompare(const void* v1, const void* v2) {