X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/utils/blobdiff_plain/acf5ef0b86d1ad68e7a5bada63aeaa118009303b..8f9d00c397a6804953a2bb06e7b226c9d7737aed:/after/after.c

diff --git a/after/after.c b/after/after.c
index af8b3a5..eb74813 100644
--- a/after/after.c
+++ b/after/after.c
@@ -274,7 +274,14 @@ int main(int argc, char **argv)
 		fprintf(stderr, "%s: parameter `%s' unexpected\n", pname, p);
 		return 1;
 	    } else {
-		pid = atoi(p);
+                char *end;
+                errno = 0;
+		pid = strtol(p, &end, 0);
+                if (errno == ERANGE || *end || pid < 0) {
+                    fprintf(stderr, "%s: unable to parse `%s' as a pid\n",
+                            pname, p);
+                    return 1;
+                }
 	    }
 	}
     }