From 036b8429a243a42918d27eaa4716f444a44e613f Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Tue, 6 Oct 2020 12:30:39 -0400
Subject: only accept id in range [0, INT_MAX]

---
 ipcrm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ipcrm.c b/ipcrm.c
index dd63c93..f6f0f47 100644
--- a/ipcrm.c
+++ b/ipcrm.c
@@ -58,11 +58,12 @@ static struct ipcrm *ipcrm_q(ipc_type type, const char *id, struct ipcrm *head)
 
 	errno = 0;
 	char *end = NULL;
-	add->id = strtol(id, &end, 0);
-	if ((end && *end) || (add->id == LONG_MAX && errno) || (add->id < 0)) {
+	long l = strtol(id, &end, 0);
+	if ((end && *end) || (l > INT_MAX) || (l < 0)) {
 		fprintf(stderr, "ipcrm: %s: %s\n", id, strerror(EINVAL));
 		return NULL;
 	}
+	add->id = l;
 
 	if (type == MSGKEY) {
 		add->id = msgget(add->id, 0);
-- 
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