NAME
cap_syslog
cap_vsyslog cap_openlog
cap_closelog cap_setlogmask
— library for syslog in
capability mode
LIBRARY
library “libcap_syslog”
SYNOPSIS
#include
<libcasper.h>
#include
<casper/cap_syslog.h>
void
cap_syslog(cap_channel_t
*chan, int pri,
const char *fmt,
...);
void
cap_vsyslog(cap_channel_t
*chan, int
priority, const char
*fmt, va_list
ap);
void
cap_openlog(cap_channel_t
*chan, const char
*ident, int logopt,
int facility);
void
cap_closelog(cap_channel_t
*chan);
int
cap_setlogmask(cap_channel_t
*chan, int
maskpri);
DESCRIPTION
The functionscap_syslog()
cap_vsyslog()
cap_openlog()
cap_closelog()
cap_setlogmask()
are respectively equivalent to
syslog(3),
vsyslog(3),
openlog(3),
closelog(3),
setlogmask(3) except that the connection to the
system.syslog service needs to be provided.
EXAMPLES
The following example first opens a capability to casper and then
uses this capability to create the system.syslog
casper service to log messages.
cap_channel_t *capcas, *capsyslog; /* Open capability to Casper. */ capcas = cap_init(); if (capcas == NULL) err(1, "Unable to contact Casper"); /* Enter capability mode sandbox. */ if (cap_enter() < 0 && errno != ENOSYS) err(1, "Unable to enter capability mode"); /* Use Casper capability to create capability to the system.syslog service. */ capsyslog = cap_service_open(capcas, "system.syslog"); if (capsyslog == NULL) err(1, "Unable to open system.syslog service"); /* Close Casper capability, we don't need it anymore. */ cap_close(capcas); /* Let's log something. */ cap_syslog(capsyslog, LOG_NOTICE, "System logs from capability mode.");
SEE ALSO
cap_enter(2), closelog(3), err(3), openlog(3), setlogmask(3) syslog(3), vsyslog(3), capsicum(4), nv(9)
AUTHORS
Mariusz Zaborski <oshogbo@FreeBSD.org>