---
 sys-utils/ipcs.c |   30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

--- util-linux-ng-2.17.2.orig/sys-utils/ipcs.c
+++ util-linux-ng-2.17.2/sys-utils/ipcs.c
@@ -239,6 +239,26 @@ print_perms (int id, struct ipc_perm *ip
 		printf(" %-10d\n", ipcp->gid);
 }
 
+static unsigned long long
+shminfo_from_proc(const char *name, unsigned long def)
+{
+	char path[256];
+	char buf[64];
+	FILE *f;
+	unsigned long long res = def;
+
+	if (!name)
+		return res;
+
+	snprintf(path, sizeof(path), "/proc/sys/kernel/%s", name);
+
+	if (!(f = fopen(path, "r")))
+		return res;
+	if (fgets(buf, sizeof(buf), f))
+		res = atoll(buf);
+	fclose(f);
+	return res;
+}
 
 void do_shm (char format)
 {
@@ -262,12 +282,12 @@ void do_shm (char format)
 			return;
 		/* glibc 2.1.3 and all earlier libc's have ints as fields
 		   of struct shminfo; glibc 2.1.91 has unsigned long; ach */
-		printf (_("max number of segments = %lu\n"),
-			(unsigned long) shminfo.shmmni);
-		printf (_("max seg size (kbytes) = %lu\n"),
-			(unsigned long) (shminfo.shmmax >> 10));
+		printf (_("max number of segments = %llu\n"),
+			shminfo_from_proc("shmmni", shminfo.shmmni));
+		printf (_("max seg size (kbytes) = %llu\n"),
+			(shminfo_from_proc("shmmax", shminfo.shmmax) >> 10));
 		printf (_("max total shared memory (kbytes) = %llu\n"),
-			getpagesize() / 1024 * (unsigned long long) shminfo.shmall);
+			getpagesize() / 1024 * shminfo_from_proc("shmall", shminfo.shmall));
 		printf (_("min seg size (bytes) = %lu\n"),
 			(unsigned long) shminfo.shmmin);
 		return;