libvirt/examples/admin/logging.c
Erik Skultety 0c169930c0 admin: Add an example demonstrating how to use the logging APIs
Provide a simple C example demonstrating the use of both query APIs as
well as setter APIs.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
2016-12-15 10:36:23 +01:00

109 lines
2.8 KiB
C

#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include "config.h"
#include<unistd.h>
#include<libvirt/libvirt-admin.h>
#include<libvirt/virterror.h>
static void printHelp(const char *argv0)
{
fprintf(stderr,
("Usage:\n"
" %s [options]\n"
"\n"
"Options:\n"
" -h Print this message.\n"
" -o [string] Specify new log outputs.\n"
" -f [string] Specify new log filters.\n"
"\n"),
argv0);
}
int main(int argc, char **argv)
{
int ret, c;
virAdmConnectPtr conn = NULL;
char *get_outputs = NULL;
char *get_filters = NULL;
const char *set_outputs = NULL;
const char *set_filters = NULL;
ret = c = -1;
opterr = 0;
while ((c = getopt(argc, argv, ":hpo:f:")) > 0) {
switch (c) {
case 'h':
printHelp(argv[0]);
exit(EXIT_SUCCESS);
case 'o':
set_outputs = optarg;
break;
case 'f':
set_filters = optarg;
break;
case ':':
fprintf(stderr, "Missing argument for option -%c\n", optopt);
exit(EXIT_FAILURE);
case '?':
fprintf(stderr, "Unrecognized option '-%c'\n", optopt);
exit(EXIT_FAILURE);
}
}
/* first, open a connection to the daemon */
if (!(conn = virAdmConnectOpen(NULL, 0)))
goto cleanup;
/* get the currently defined log outputs and filters */
if (virAdmConnectGetLoggingOutputs(conn, &get_outputs, 0) < 0 ||
virAdmConnectGetLoggingFilters(conn, &get_filters, 0) < 0)
goto cleanup;
fprintf(stdout,
"Current settings:\n"
" outputs: %s\n"
" filters: %s\n"
"\n",
get_outputs, get_filters ? get_filters : "None");
free(get_outputs);
free(get_filters);
/* no arguments were provided */
if (argc == 1) {
ret = 0;
goto cleanup;
}
/* now, try to change the redefine the current log output and filters */
if (virAdmConnectSetLoggingOutputs(conn, set_outputs, 0) < 0)
goto cleanup;
if (virAdmConnectSetLoggingFilters(conn, set_filters, 0) < 0)
goto cleanup;
/* get the currently defined log outputs and filters */
if (virAdmConnectGetLoggingOutputs(conn, &get_outputs, 0) < 0 ||
virAdmConnectGetLoggingFilters(conn, &get_filters, 0) < 0)
goto cleanup;
fprintf(stdout,
"New settings:\n"
" outputs: %s\n"
" filters: %s\n"
"\n",
get_outputs ? get_outputs : "Default",
get_filters ? get_filters : "None");
free(get_outputs);
free(get_filters);
ret = 0;
cleanup:
virAdmConnectClose(conn);
return ret;
}