rlimit regression test

diff --git a/src/regression/rlimit-open-files.c b/src/regression/rlimit-open-files.c
new file mode 100644 (file)
index 0000000..b946663
--- /dev/null
+++ b/src/regression/rlimit-open-files.c
@@ -0,0 +1,33 @@
+// rlimit should be able to set file limits
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/resource.h>
+#include "test.h"
+
+int main(void)
+{
+       static const long lim = 42;
+       static const int r = RLIMIT_NOFILE;
+       struct rlimit rl;
+       int fd, maxfd = 0;
+
+       rl.rlim_max = lim;
+       rl.rlim_cur = lim;
+       if (setrlimit(r, &rl))
+               t_error("setrlimit(%d, %ld) failed: %s\n", r, lim, strerror(errno));
+       if (getrlimit(r, &rl))
+               t_error("getrlimit(%d) failed: %s\n", r, strerror(errno));
+       if (lim != rl.rlim_max || lim != rl.rlim_cur)
+               t_error("getrlimit %d says cur=%ld,max=%ld after setting the limit to %ld\n", r, rl.rlim_cur, rl.rlim_max, lim);
+
+       while((fd=dup(1)) != -1)
+               if (fd > maxfd) maxfd = fd;
+       if (errno != EMFILE)
+               t_error("dup(1) failed with %s, wanted EMFILE\n", strerror(errno));
+       if (maxfd+1 != lim)
+               t_error("more fds are open than rlimit allows: fd=%d, limit=%d\n", maxfd, lim);
+
+       return t_status;
+}