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authorrsc <rsc>2007-08-24 20:20:23 +0000
committerrsc <rsc>2007-08-24 20:20:23 +0000
commite0e7d07e5afc1a073b659cbf0b8594071f05a816 (patch)
treeca49d4be6d276c241ef2fff485c34b72090ce0f0 /usertests.c
parent5af5f6aa7f52db85f0f22555ae39395dbe68b731 (diff)
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test that fork fails gracefully
Diffstat (limited to 'usertests.c')
-rw-r--r--usertests.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/usertests.c b/usertests.c
index 3a9cd9a..17c7044 100644
--- a/usertests.c
+++ b/usertests.c
@@ -1189,6 +1189,44 @@ iref(void)
printf(1, "empty file name OK\n");
}
+// test that fork fails gracefully
+// the forktest binary also does this, but it runs out of proc entries first.
+// inside the bigger usertests binary, we run out of memory first.
+void
+forktest(void)
+{
+ int n, pid;
+
+ printf(1, "fork test\n");
+
+ for(n=0; n<1000; n++){
+ pid = fork();
+ if(pid < 0)
+ break;
+ if(pid == 0)
+ exit();
+ }
+
+ if(n == 1000){
+ printf(1, "fork claimed to work 1000 times!\n");
+ exit();
+ }
+
+ for(; n > 0; n--){
+ if(wait() < 0){
+ printf(1, "wait stopped early\n");
+ exit();
+ }
+ }
+
+ if(wait() != -1){
+ printf(1, "wait got too many\n");
+ exit();
+ }
+
+ printf(1, "fork test OK\n");
+}
+
int
main(int argc, char *argv[])
{
@@ -1223,6 +1261,7 @@ main(int argc, char *argv[])
sharedfd();
dirfile();
iref();
+ forktest();
exectest();