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htop
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Fix crashes when process list is empty

This commit is contained in:
Hisham Muhammad 2012-03-05 11:18:27 +00:00
parent 368cb1fe20
commit bca656c79e
3 changed files with 30 additions and 11 deletions
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5
ChangeLog
View File

@ -1,4 +1,9 @@
What's new in version 1.0.2
* Avoid deleting .htoprc if it is a symlink
* BUGFIX: Fix crashes when process list is empty
What's new in version 1.0.1
* Move .htoprc to XDG-compliant path ~/.config/htop/htoprc,

6
Panel.c
View File

@ -199,8 +199,10 @@ Object* Panel_remove(Panel* this, int i) {
Object* Panel_getSelected(Panel* this) {
assert (this != NULL);
return Vector_get(this->items, this->selected);
if (Vector_size(this->items) > 0)
return Vector_get(this->items, this->selected);
else
return NULL;
}
void Panel_moveSelectedUp(Panel* this) {

30
htop.c
View File

@ -189,7 +189,7 @@ static bool changePriority(Panel* panel, int delta) {
}
if (!anyTagged) {
Process* p = (Process*) Panel_getSelected(panel);
ok = Process_setPriority(p, p->nice + delta) && ok;
if (p) ok = Process_setPriority(p, p->nice + delta) && ok;
}
if (!ok)
beep();
@ -440,7 +440,8 @@ int main(int argc, char** argv) {
gettimeofday(&tv, NULL);
newTime = ((double)tv.tv_sec * 10) + ((double)tv.tv_usec / 100000);
recalculate = (newTime - oldTime > CRT_delay);
int following = follow ? ((Process*)Panel_getSelected(panel))->pid : -1;
Process* p = (Process*)Panel_getSelected(panel);
int following = (follow && p) ? p->pid : -1;
if (recalculate)
oldTime = newTime;
if (doRefresh) {
@ -481,6 +482,7 @@ int main(int argc, char** argv) {
doRefresh = false;
int size = Panel_size(panel);
if (ch == KEY_F(3)) {
if (Panel_size(panel) == 0) continue;
int here = Panel_getSelectedIndex(panel);
int i = here+1;
while (i != here) {
@ -541,11 +543,12 @@ int main(int argc, char** argv) {
continue;
}
if (isdigit((char)ch)) {
if (Panel_size(panel) == 0) continue;
pid_t pid = ch-48 + acc;
for (int i = 0; i < ProcessList_size(pl) && ((Process*) Panel_getSelected(panel))->pid != pid; i++)
Panel_setSelected(panel, i);
acc = pid * 10;
if (acc > 100000)
if (acc > 10000000)
acc = 0;
continue;
} else {
@ -644,13 +647,16 @@ int main(int argc, char** argv) {
case ' ':
{
Process* p = (Process*) Panel_getSelected(panel);
if (!p) break;
Process_toggleTag(p);
Panel_onKey(panel, KEY_DOWN);
break;
}
case 's':
{
TraceScreen* ts = TraceScreen_new((Process*) Panel_getSelected(panel));
Process* p = (Process*) Panel_getSelected(panel);
if (!p) break;
TraceScreen* ts = TraceScreen_new(p);
TraceScreen_run(ts);
TraceScreen_delete(ts);
clear();
@ -661,7 +667,9 @@ int main(int argc, char** argv) {
}
case 'l':
{
OpenFilesScreen* ts = OpenFilesScreen_new((Process*) Panel_getSelected(panel));
Process* p = (Process*) Panel_getSelected(panel);
if (!p) break;
OpenFilesScreen* ts = OpenFilesScreen_new(p);
OpenFilesScreen_run(ts);
OpenFilesScreen_delete(ts);
clear();
@ -714,6 +722,7 @@ int main(int argc, char** argv) {
case '-':
{
Process* p = (Process*) Panel_getSelected(panel);
if (!p) break;
p->showChildren = !p->showChildren;
refreshTimeout = 0;
doRecalculate = true;
@ -726,7 +735,7 @@ int main(int argc, char** argv) {
killPanel = (Panel*) SignalsPanel_new(0, 0, 0, 0);
}
bool anyTagged = false;
pid_t selectedPid;
pid_t selectedPid = 0;
for (int i = 0; i < Panel_size(panel); i++) {
Process* p = (Process*) Panel_get(panel, i);
if (p->tag) {
@ -736,8 +745,9 @@ int main(int argc, char** argv) {
}
if (!anyTagged) {
Process* p = (Process*) Panel_getSelected(panel);
selectedPid = p->pid;
if (p) selectedPid = p->pid;
}
if (selectedPid == 0) break;
SignalsPanel_reset((SignalsPanel*) killPanel);
const char* fuFunctions[] = {"Send ", "Cancel ", NULL};
ListItem* sgn = (ListItem*) pickFromVector(panel, killPanel, 15, headerHeight, fuFunctions, defaultBar, header);
@ -772,7 +782,9 @@ int main(int argc, char** argv) {
if (pl->cpuCount == 1)
break;
Affinity* affinity = Process_getAffinity((Process*) Panel_getSelected(panel));
Process* p = (Process*) Panel_getSelected(panel);
if (!p) break;
Affinity* affinity = Process_getAffinity(p);
if (!affinity) break;
Panel* affinityPanel = AffinityPanel_new(pl, affinity);
Affinity_delete(affinity);
@ -792,7 +804,7 @@ int main(int argc, char** argv) {
}
if (!anyTagged) {
Process* p = (Process*) Panel_getSelected(panel);
ok = Process_setAffinity(p, affinity) && ok;
if (p) ok = Process_setAffinity(p, affinity) && ok;
}
if (!ok)
beep();