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authorRusty Russell <rusty@rustcorp.com.au>2012-03-08 14:14:22 +1030
committerRusty Russell <rusty@rustcorp.com.au>2012-03-08 06:30:48 +0100
commitb442e375256d93637b38f997a78e330ba4774c43 (patch)
treeb7cde6a93748b146c98410edcb5ac4c35ffffd70 /lib/ccan/failtest/test
parent256e2df9dc147b6d98afb4fa2ccdf5f65eaef30c (diff)
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failtest: don't assume FD_SETSIZE is maximum runtime fd.
This breaks when rlimit is less. Unfortunately, valgrind (32 bit x86, 3.7.0.SVN, Ubuntu) fails to set the file limit properly on the test: reducing it to the obvious getrlimit/setrlimit/getrlimit works fine, so leaving diagnostics for another day. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (Imported from CCAN commit a85a809bb17af6b6cf6fa31b300c6622f64ee700) Autobuild-User: Rusty Russell <rusty@rustcorp.com.au> Autobuild-Date: Thu Mar 8 06:30:48 CET 2012 on sn-devel-104
Diffstat (limited to 'lib/ccan/failtest/test')
-rw-r--r--lib/ccan/failtest/test/run-with-fdlimit.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/ccan/failtest/test/run-with-fdlimit.c b/lib/ccan/failtest/test/run-with-fdlimit.c
new file mode 100644
index 0000000000..6b4483f07e
--- /dev/null
+++ b/lib/ccan/failtest/test/run-with-fdlimit.c
@@ -0,0 +1,51 @@
+/* Include the C files directly. */
+#include <ccan/failtest/failtest.c>
+#include <stdlib.h>
+#include <err.h>
+#include <ccan/tap/tap.h>
+
+int main(void)
+{
+ int fd, pfd[2], ecode;
+ struct rlimit lim;
+
+ if (getrlimit(RLIMIT_NOFILE, &lim) != 0)
+ err(1, "getrlimit RLIMIT_NOFILE fail?");
+
+ printf("rlimit = %lu/%lu (inf=%lu)\n",
+ (long)lim.rlim_cur, (long)lim.rlim_max,
+ (long)RLIM_INFINITY);
+ lim.rlim_cur /= 2;
+ if (lim.rlim_cur < 8)
+ errx(1, "getrlimit limit %li too low", (long)lim.rlim_cur);
+ if (setrlimit(RLIMIT_NOFILE, &lim) != 0)
+ err(1, "setrlimit RLIMIT_NOFILE (%li/%li)",
+ (long)lim.rlim_cur, (long)lim.rlim_max);
+
+ plan_tests(2);
+ failtest_init(0, NULL);
+
+ if (pipe(pfd))
+ abort();
+
+ fd = failtest_open("run-with-fdlimit-scratch", "run-with_fdlimit.c", 1,
+ O_RDWR|O_CREAT, 0600);
+ if (fd == -1) {
+ /* We are the child: write error code for parent to check. */
+ ecode = errno;
+ if (write(pfd[1], &ecode, sizeof(ecode)) != sizeof(ecode))
+ abort();
+ failtest_exit(0);
+ }
+
+ /* Check child got correct errno. */
+ ok1(read(pfd[0], &ecode, sizeof(ecode)) == sizeof(ecode));
+ ok1(ecode == EACCES);
+
+ /* Clean up. */
+ failtest_close(fd, "run-open.c", 1);
+ close(pfd[0]);
+ close(pfd[1]);
+
+ return exit_status();
+}