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9ef6541cec
Some of our examples use GNU/Linux extensions functions/variables: 1) domtop.c uses usleep(3), 2) logging.c uses getopt(3). Put _GNU_SOURCE definition at the top of corresponding files so that users can just grab the code and compile it (in contrast with the rest of the code where _GNU_SOURCE is declared in meson-config.h). Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <libvirt/libvirt-admin.h>
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#include <libvirt/virterror.h>
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static void printHelp(const char *argv0)
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{
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fprintf(stderr,
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("Usage:\n"
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" %s [options]\n"
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"\n"
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"Options:\n"
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" -h Print this message.\n"
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" -o [string] Specify new log outputs.\n"
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" -f [string] Specify new log filters.\n"
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"\n"),
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argv0);
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}
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int main(int argc, char **argv)
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{
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int ret, c;
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virAdmConnectPtr conn = NULL;
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char *get_outputs = NULL;
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char *get_filters = NULL;
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const char *set_outputs = NULL;
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const char *set_filters = NULL;
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ret = c = -1;
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opterr = 0;
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while ((c = getopt(argc, argv, ":hpo:f:")) > 0) {
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switch (c) {
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case 'h':
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printHelp(argv[0]);
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exit(EXIT_SUCCESS);
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case 'o':
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set_outputs = optarg;
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break;
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case 'f':
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set_filters = optarg;
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break;
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case ':':
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fprintf(stderr, "Missing argument for option -%c\n", optopt);
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exit(EXIT_FAILURE);
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case '?':
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fprintf(stderr, "Unrecognized option '-%c'\n", optopt);
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exit(EXIT_FAILURE);
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}
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}
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/* first, open a connection to the daemon */
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if (!(conn = virAdmConnectOpen(NULL, 0)))
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goto cleanup;
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/* get the currently defined log outputs and filters */
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if (virAdmConnectGetLoggingOutputs(conn, &get_outputs, 0) < 0 ||
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virAdmConnectGetLoggingFilters(conn, &get_filters, 0) < 0)
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goto cleanup;
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fprintf(stdout,
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"Current settings:\n"
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" outputs: %s\n"
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" filters: %s\n"
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"\n",
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get_outputs, get_filters ? get_filters : "None");
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free(get_outputs);
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free(get_filters);
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/* no arguments were provided */
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if (argc == 1) {
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ret = 0;
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goto cleanup;
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}
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/* now, try to change the current log output and filters */
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if (virAdmConnectSetLoggingOutputs(conn, set_outputs, 0) < 0)
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goto cleanup;
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if (virAdmConnectSetLoggingFilters(conn, set_filters, 0) < 0)
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goto cleanup;
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/* get the currently defined log outputs and filters */
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if (virAdmConnectGetLoggingOutputs(conn, &get_outputs, 0) < 0 ||
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virAdmConnectGetLoggingFilters(conn, &get_filters, 0) < 0)
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goto cleanup;
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fprintf(stdout,
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"New settings:\n"
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" outputs: %s\n"
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" filters: %s\n"
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"\n",
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get_outputs ? get_outputs : "Default",
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get_filters ? get_filters : "None");
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free(get_outputs);
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free(get_filters);
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ret = 0;
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cleanup:
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virAdmConnectClose(conn);
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return ret;
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}
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