From c31da9332d2e9005baa70bd35a88826334aea0e1 Mon Sep 17 00:00:00 2001
From: Johannes Löthberg <johannes@kyriasis.com>
Date: Wed, 5 Nov 2014 08:51:07 +0100
Subject: yawa.c: nuke atoi

---
 src/yawa.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/yawa.c b/src/yawa.c
index d6219e6..7d67fac 100644
--- a/src/yawa.c
+++ b/src/yawa.c
@@ -61,7 +61,6 @@ parse_opt (int key, char *arg, struct argp_state *state)
 				fprintf(stderr, "No digits were found\n");
 				exit(-2);
 			}
-
 			break;
 		case 'c':
 			arguments->clear = true;
@@ -92,7 +91,19 @@ parse_opt (int key, char *arg, struct argp_state *state)
 			break;
 		case 'A':
 			arguments->alpha = true;
-			arguments->alpha_amount = atoi(arg);
+			val = strtol(arg, &endptr, 10);
+			arguments->alpha_amount = (int)val;
+
+			if ((errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
+					|| (errno != 0 && val == 0)) {
+				perror("strtol");
+				exit(-2);
+			}
+
+			if (endptr == arg) {
+				fprintf(stderr, "No digits were found\n");
+				exit(-2);
+			}
 			break;
 		default:
 			return ARGP_ERR_UNKNOWN;
-- 
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