xfnw/plan9fox
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

rio: copy window labels for menu3

Browse source 
as the menu is displayed, the window might go away or change its
label causing menuhit() to dereference bad memory. just strdup()
the labels before passing to menu3str to prevent accidents.
This commit is contained in:
cinap_lenrek 2012-10-18 18:51:32 +02:00
parent 3730a4df53
commit 0a3eb7d6b1
1 changed files with 8 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
sys/src/cmd/rio/rio.c
View file

@ -709,10 +709,14 @@ button3menu(void)
}
if(n >= nelem(menu3str)-Hidden)
n = nelem(menu3str)-Hidden-1;
for(i=0; i<n; i++)
menu3str[i+Hidden] = hidden[i]->label;
menu3str[i+Hidden] = nil;
for(i=0; i<n; i++){
free(menu3str[i+Hidden]);
menu3str[i+Hidden] = estrdup(hidden[i]->label);
}
for(i+=Hidden; menu3str[i]; i++){
free(menu3str[i]);
menu3str[i] = nil;
}
sweeping = 1;
switch(i = menuhit(3, mousectl, &menu3, wscreen)){
case -1: