git: 11af9a9cf930 - stable/13 - cap_sysctl.3: Fix bugs in the example

[Mark Johnston]

The branch stable/13 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=11af9a9cf930123ba164ffc63976fe1d67ce614e

commit 11af9a9cf930123ba164ffc63976fe1d67ce614e
Author:     Mark Johnston <markj at FreeBSD.org>
AuthorDate: 2021-04-28 14:38:52 +0000
Commit:     Mark Johnston <markj at FreeBSD.org>
CommitDate: 2021-05-05 15:01:56 +0000

    cap_sysctl.3: Fix bugs in the example
    
    - Correct the type of the sysctl value.
    - Initialize the oldsize parameter to cap_sysctlbyname()
    
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit 44bbda649dc6c1cdc5a99641e14c77157967e140)
---
 lib/libcasper/services/cap_sysctl/cap_sysctl.3 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/libcasper/services/cap_sysctl/cap_sysctl.3 b/lib/libcasper/services/cap_sysctl/cap_sysctl.3
index 5d840796515e..0a7d009e1c3c 100644
--- a/lib/libcasper/services/cap_sysctl/cap_sysctl.3
+++ b/lib/libcasper/services/cap_sysctl/cap_sysctl.3
@@ -131,8 +131,8 @@ capability to get the value of
 cap_channel_t *capcas, *capsysctl;
 const char *name = "kern.trap_enotcap";
 void *limit;
-int value;
 size_t size;
+bool value;
 
 /* Open capability to Casper. */
 capcas = cap_init();
@@ -160,6 +160,7 @@ if (cap_sysctl_limit(limit) < 0)
 	err(1, "Unable to set limits");
 
 /* Fetch value. */
+size = sizeof(value);
 if (cap_sysctlbyname(capsysctl, name, &value, &size, NULL, 0) < 0)
 	err(1, "Unable to get value of sysctl");