cleanup src/linux and src/misc trees, etc.

previously, it was pretty much random which one of these trees a given
function appeared in. they have now been organized into:

src/linux: non-POSIX linux syscalls (possibly shard with other nixen)
src/legacy: various obsolete/legacy functions, mostly wrappers
src/misc: still mostly uncategorized; some misc POSIX, some nonstd
src/crypt: crypt hash functions

further cleanup will be done later.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/legacy/ulimit.c b/src/legacy/ulimit.c
new file mode 100644
index 00000000..1f59e8e6
--- /dev/null
+++ b/src/legacy/ulimit.c
@@ -0,0 +1,19 @@
+#include <sys/resource.h>
+#include <ulimit.h>
+#include <stdarg.h>
+
+long ulimit(int cmd, ...)
+{
+	struct rlimit rl;
+	getrlimit(RLIMIT_FSIZE, &rl);
+	if (cmd == UL_SETFSIZE) {
+		long val;
+		va_list ap;
+		va_start(ap, cmd);
+		val = va_arg(ap, long);
+		va_end(ap);
+		rl.rlim_cur = 512ULL * val;
+		if (setrlimit(RLIMIT_FSIZE, &rl)) return -1;
+	}
+	return rl.rlim_cur / 512;
+}