Grab the lock before reading uid/gid related structure, this will

[ipfw.git] / ipfw / expand_number.c

diff --git a/ipfw/expand_number.c b/ipfw/expand_number.c
new file mode 100644 (file)
index 0000000..d557111
--- /dev/null
+++ b/ipfw/expand_number.c
@@ -0,0 +1,100 @@
+/*-
+ * Copyright (c) 2007 Eric Anderson <anderson@FreeBSD.org>
+ * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+// #include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libutil/expand_number.c,v 1.2.4.2 2009/06/10 14:52:34 des Exp $");
+
+#include <sys/types.h>
+#include <ctype.h>
+#include <errno.h>
+#include <inttypes.h>
+//#include <libutil.h>
+#include <stdint.h>
+
+/*
+ * Convert an expression of the following forms to a int64_t.
+ *     1) A positive decimal number.
+ *     2) A positive decimal number followed by a 'b' or 'B' (mult by 1).
+ *     3) A positive decimal number followed by a 'k' or 'K' (mult by 1 << 10).
+ *     4) A positive decimal number followed by a 'm' or 'M' (mult by 1 << 20).
+ *     5) A positive decimal number followed by a 'g' or 'G' (mult by 1 << 30).
+ *     6) A positive decimal number followed by a 't' or 'T' (mult by 1 << 40).
+ *     7) A positive decimal number followed by a 'p' or 'P' (mult by 1 << 50).
+ *     8) A positive decimal number followed by a 'e' or 'E' (mult by 1 << 60).
+ */
+int
+expand_number(const char *buf, int64_t *num)
+{
+       static const char unit[] = "bkmgtpe";
+       char *endptr, s;
+       int64_t number;
+       int i;
+
+       number = strtoimax(buf, &endptr, 0);
+
+       if (endptr == buf) {
+               /* No valid digits. */
+               errno = EINVAL;
+               return (-1);
+       }
+
+       if (*endptr == '\0') {
+               /* No unit. */
+               *num = number;
+               return (0);
+       }
+
+       s = tolower(*endptr);
+       switch (s) {
+       case 'b':
+       case 'k':
+       case 'm':
+       case 'g':
+       case 't':
+       case 'p':
+       case 'e':
+               break;
+       default:
+               /* Unrecognized unit. */
+               errno = EINVAL;
+               return (-1);
+       }
+
+       for (i = 0; unit[i] != '\0'; i++) {
+               if (s == unit[i])
+                       break;
+               if ((number < 0 && (number << 10) > number) ||
+                   (number >= 0 && (number << 10) < number)) {
+                       errno = ERANGE;
+                       return (-1);
+               }
+               number <<= 10;
+       }
+
+       *num = number;
+       return (0);
+}