/*
Copyright (C) 2013 Rocky Bernstein <rocky@gnu.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* Simple program to show how to set log verbosity and how to write a
custom log handler.
Invoke with an argument level, e.g.
logging debug
or with a number like:
logging 1 # same as debug
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#define __CDIO_CONFIG_H__ 1
#endif
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <cdio/cdio.h>
#include <cdio/cd_types.h>
#include <cdio/logging.h>
/* Here is an example of a custom log handler. */
static void
custom_log_handler (cdio_log_level_t level, const char *message)
{
switch(level) {
case CDIO_LOG_DEBUG:
printf("-- custom debug message: %s\n", message);
return;
case CDIO_LOG_INFO:
printf("-- custom info message: %s\n", message);
return;
case CDIO_LOG_WARN:
printf("-- custom warning message: %s\n", message);
return;
case CDIO_LOG_ERROR:
printf("-- custom error message: %s\n", message);
return;
case CDIO_LOG_ASSERT:
printf("-- custom assertion message: %s\n", message);
return;
default:
printf("custom level %d message: %s\n", level, message);
}
}
static long
parse_loglevel_arg(const char *ps_loglevel) {
long loglevel;
if (strncmp(ps_loglevel, "debug", strlen("debug")) == 0) {
loglevel = CDIO_LOG_DEBUG;
} else if (strncmp(ps_loglevel, "info", strlen("info")) == 0) {
loglevel = CDIO_LOG_INFO;
} else if (strncmp(ps_loglevel, "warn", strlen("warn")) == 0) {
loglevel = CDIO_LOG_WARN;
} else if (strncmp(ps_loglevel, "error", strlen("error")) == 0) {
loglevel = CDIO_LOG_ERROR;
} else if (strncmp(ps_loglevel, "assert", strlen("assert")) == 0) {
loglevel = CDIO_LOG_ASSERT;
} else {
char *endptr;
errno = 0; /* To distinguish success/failure after call */
loglevel = strtol(ps_loglevel, &endptr, 10);
/* Check for various possible errors, in parsing the verbosity
* level. */
if ((errno == ERANGE &&
(loglevel == LONG_MAX || loglevel == LONG_MIN))
|| (errno != 0 && loglevel == 0)) {
perror("strtol conversion error of loglevel");
exit(EXIT_FAILURE);
}
if (endptr == ps_loglevel) {
fprintf(stderr, "No digits were found\n");
exit(EXIT_FAILURE);
}
}
return loglevel;
}
static void
print_drives(void)
{
char **ppsz_cd_drives=NULL, **c;
/* Print out a list of CD-drives with the above set log level. */
ppsz_cd_drives = cdio_get_devices(DRIVER_DEVICE);
if (NULL != ppsz_cd_drives)
for( c = ppsz_cd_drives; *c != NULL; c++ ) {
printf("-- Drive %s\n", *c);
}
cdio_free_device_list(ppsz_cd_drives);
}
int
main(int argc, const char *argv[])
{
/* Set the log level to the warning verbosity. */
cdio_loglevel_default = CDIO_LOG_WARN;
/* Parse command arguemnts */
if (argc > 2) {
printf("Usage:\n%s <verbosity-level>\n"
"Shows drives.\n"
"A verbosity level is a name like 'debug', 'info', 'warn,'\n"
"or a number greater than 0.\n",
argv[0]);
exit(EXIT_FAILURE);
}
if (argc == 2) {
/* Set cdio's verbosity level. */
cdio_loglevel_default = parse_loglevel_arg(argv[1]);
}
print_drives();
/* Do the same thing again but with a custom log handler. */
cdio_log_set_handler (custom_log_handler);
print_drives();
return 0;
}