[src/trunk]: src/sbin/raidctl Better sanity check numbers given to raidctl(8)

[manu <manu%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0c862bb08cc6
branches:  trunk
changeset: 808630:0c862bb08cc6
user:      manu <manu%NetBSD.org@localhost>
date:      Wed May 27 15:31:15 2015 +0000

description:
Better sanity check numbers given to raidctl(8)

Replace atoi(3) by strtol(3), and check that numbers are valid,
positive, and in int32_t range. The previous lack of check could
silently lead to the same serial being set to all RAID volumes
for instance because given numbers were bigger than INT_MAX. The
consequence is in an awful mess when RAIDframe would mix volumes...

diffstat:

 sbin/raidctl/raidctl.c |  34 +++++++++++++++++++++++++++++-----
 1 files changed, 29 insertions(+), 5 deletions(-)

diffs (76 lines):

diff -r 23ae8488bd33 -r 0c862bb08cc6 sbin/raidctl/raidctl.c
--- a/sbin/raidctl/raidctl.c    Wed May 27 15:18:29 2015 +0000
+++ b/sbin/raidctl/raidctl.c    Wed May 27 15:31:15 2015 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: raidctl.c,v 1.57 2014/04/03 18:54:10 christos Exp $   */
+/*      $NetBSD: raidctl.c,v 1.58 2015/05/27 15:31:15 manu Exp $   */
 
 /*-
  * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@@ -39,7 +39,7 @@
 #include <sys/cdefs.h>
 
 #ifndef lint
-__RCSID("$NetBSD: raidctl.c,v 1.57 2014/04/03 18:54:10 christos Exp $");
+__RCSID("$NetBSD: raidctl.c,v 1.58 2015/05/27 15:31:15 manu Exp $");
 #endif
 
 
@@ -85,6 +85,7 @@
 static  void get_time_string(char *, int);
 static  void rf_output_pmstat(int, int);
 static  void rf_pm_configure(int, int, char *, int[]);
+static  unsigned int _strtoud(char *);
 
 int verbose;
 
@@ -183,7 +184,7 @@
                        break;
                case 'I':
                        action = RAIDFRAME_INIT_LABELS;
-                       serial_number = atoi(optarg);
+                       serial_number = _strtoud(optarg);
                        num_options++;
                        break;
                case 'm':
@@ -195,11 +196,11 @@
                        action = RAIDFRAME_PARITYMAP_SET_DISABLE;
                        parityconf = strdup(optarg);
                        num_options++;
-                       /* XXXjld: should rf_pm_configure do the atoi()s? */
+                       /* XXXjld: should rf_pm_configure do the strtol()s? */
                        i = 0;
                        while (i < 3 && optind < argc &&
                            isdigit((int)argv[optind][0]))
-                               parityparams[i++] = atoi(argv[optind++]);
+                               parityparams[i++] = _strtoud(argv[optind++]);
                        while (i < 3)
                                parityparams[i++] = 0;
                        break;
@@ -1158,3 +1159,26 @@
        exit(1);
        /* NOTREACHED */
 }
+
+static unsigned int
+_strtoud(char *str)
+{
+       long num;
+       char *ep;
+
+       errno = 0;
+       num = strtol(str, &ep, 10);
+       if (str[0] == '\0' || *ep != '\0')
+               errx(1, "Not a number: %s", str);
+
+       if (errno)
+               err(1, "Inavlid number %s", str);
+
+       if (num < 0)
+               errx(1, "Negative number: %s", str);
+
+       if (num > INT_MAX)
+               errx(1, "Number too large: %s", str);
+
+       return (unsigned int)num;
+}