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cap_sysctl.3: Fix bugs in the example

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- Correct the type of the sysctl value.
- Initialize the oldsize parameter to cap_sysctlbyname()

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Mark Johnston 2021-04-28 10:38:52 -04:00
parent 48be5b976e
commit 44bbda649d
1 changed files with 2 additions and 1 deletions
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3
lib/libcasper/services/cap_sysctl/cap_sysctl.3
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@ -131,8 +131,8 @@ capability to get the value of
cap_channel_t *capcas, *capsysctl; cap_channel_t *capcas, *capsysctl;
const char *name = "kern.trap_enotcap"; const char *name = "kern.trap_enotcap";
void *limit; void *limit;
int value;
size_t size; size_t size;
bool value;
/* Open capability to Casper. */ /* Open capability to Casper. */
capcas = cap_init(); capcas = cap_init();
@ -160,6 +160,7 @@ if (cap_sysctl_limit(limit) < 0)
err(1, "Unable to set limits"); err(1, "Unable to set limits");
/* Fetch value. */ /* Fetch value. */
size = sizeof(value);
if (cap_sysctlbyname(capsysctl, name, &value, &size, NULL, 0) < 0) if (cap_sysctlbyname(capsysctl, name, &value, &size, NULL, 0) < 0)
err(1, "Unable to get value of sysctl"); err(1, "Unable to get value of sysctl");