Initial version

1 files changed, 51 insertions, 0 deletions

diff --git a/src/misc/setrlimit.c b/src/misc/setrlimit.c
new file mode 100644
index 0000000..edb413f
--- /dev/null
+++ b/src/misc/setrlimit.c
@@ -0,0 +1,51 @@
+#include <sys/resource.h>
+#include <errno.h>
+#include "syscall.h"
+#include "libc.h"
+
+#define MIN(a, b) ((a)<(b) ? (a) : (b))
+#define FIX(x) do{ if ((x)>=SYSCALL_RLIM_INFINITY) (x)=RLIM_INFINITY; }while(0)
+
+struct ctx {
+	unsigned long lim[2];
+	int res;
+	int err;
+};
+
+#ifdef SYS_setrlimit
+static void do_setrlimit(void *p)
+{
+	struct ctx *c = p;
+	if (c->err>0) return;
+	c->err = -__syscall(SYS_setrlimit, c->res, c->lim);
+}
+#endif
+
+int setrlimit(int resource, const struct rlimit *rlim)
+{
+	struct rlimit tmp;
+	if (SYSCALL_RLIM_INFINITY != RLIM_INFINITY) {
+		tmp = *rlim;
+		FIX(tmp.rlim_cur);
+		FIX(tmp.rlim_max);
+		rlim = &tmp;
+	}
+	int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
+#ifdef SYS_setrlimit
+	if (ret != -ENOSYS) return __syscall_ret(ret);
+
+	struct ctx c = {
+		.lim[0] = MIN(rlim->rlim_cur, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
+		.lim[1] = MIN(rlim->rlim_max, MIN(-1UL, SYSCALL_RLIM_INFINITY)),
+		.res = resource, .err = -1
+	};
+	__synccall(do_setrlimit, &c);
+	if (c.err) {
+		if (c.err>0) errno = c.err;
+		return -1;
+	}
+	return 0;
+#else
+	return __syscall_ret(ret);
+#endif
+}