X-Git-Url: https://gapil.gnulinux.it/gitweb/?a=blobdiff_plain;f=listati%2Ferrcode_mess.c;fp=listati%2Ferrcode_mess.c;h=61321bc8725f6ea04488b4a8f8caac16227d5860;hb=cf60963212306540ce7485ed7c86405e143a3352;hp=0000000000000000000000000000000000000000;hpb=6377acba6d39c62ceff07a420e0028bf6e03408c;p=gapil.git

diff --git a/listati/errcode_mess.c b/listati/errcode_mess.c
new file mode 100644
index 0000000..61321bc
--- /dev/null
+++ b/listati/errcode_mess.c
@@ -0,0 +1,17 @@
+    /* convert string to number */
+    err = strtol(argv[optind], NULL, 10);
+    /* testing error condition on conversion */
+    if (err==LONG_MIN) {
+        perror("Underflow on error code");
+        return 1;
+    } else if (err==LONG_MIN) {
+        perror("Overflow on error code");
+        return 1;
+    }
+    /* conversion is fine */
+    if (message) {
+        printf("Error message for %d is %s\n", err, strerror(err));
+    }
+    if (label) {
+        printf("Error label for %d is %s\n", err, err_code[err]);
+    }