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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: © 2014 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
/* dmesg.c - barebox logbuffer handling */
#include <common.h>
#include <malloc.h>
#include <command.h>
#include <globalvar.h>
#include <environment.h>
#include <getopt.h>
#include <clock.h>
static int str_to_loglevel(const char *str)
{
int ret;
unsigned long level;
ret = kstrtoul(str, 10, &level);
if (!ret) {
if (level > MSG_VDEBUG)
goto unknown;
return level;
}
if (!strcmp(str, "vdebug"))
return MSG_VDEBUG;
if (!strcmp(str, "debug"))
return MSG_DEBUG;
if (!strcmp(str, "info"))
return MSG_INFO;
if (!strcmp(str, "notice"))
return MSG_NOTICE;
if (!strcmp(str, "warn"))
return MSG_WARNING;
if (!strcmp(str, "err"))
return MSG_ERR;
if (!strcmp(str, "crit"))
return MSG_CRIT;
if (!strcmp(str, "alert"))
return MSG_ALERT;
if (!strcmp(str, "emerg"))
return MSG_EMERG;
unknown:
printf("dmesg: unknown loglevel %s\n", str);
return -EINVAL;
}
static unsigned dmesg_get_levels(const char *__args)
{
char *args = xstrdup(__args);
char *str, *levels = args;
unsigned flags = 0;
while (1) {
int level;
str = strsep(&levels, ",");
if (!str)
break;
level = str_to_loglevel(str);
if (level < 0) {
flags = 0;
break;
}
flags |= BIT(level);
}
free(args);
return flags;
}
static int do_dmesg(int argc, char *argv[])
{
int opt, ret, i;
int delete_buf = 0, emit = 0;
unsigned flags = 0, levels = 0;
char *set = NULL;
while ((opt = getopt(argc, argv, "ctderl:n:")) > 0) {
switch (opt) {
case 'c':
delete_buf = 1;
break;
case 't':
flags |= BAREBOX_LOG_PRINT_TIME;
break;
case 'd':
flags |= BAREBOX_LOG_DIFF_TIME;
break;
case 'e':
emit = 1;
break;
case 'l':
levels = dmesg_get_levels(optarg);
if (!levels)
return COMMAND_ERROR;
break;
case 'r':
flags |= BAREBOX_LOG_PRINT_RAW | BAREBOX_LOG_PRINT_TIME;
break;
case 'n':
set = optarg;
break;
default:
return COMMAND_ERROR_USAGE;
}
}
if (set) {
int level = str_to_loglevel(set);
if (level < 0)
return COMMAND_ERROR;
barebox_loglevel = level;
return 0;
}
if (emit) {
char *buf;
int len = 0;
for (i = optind; i < argc; i++)
len += strlen(argv[i]) + 1;
buf = malloc(len + 2);
if (!buf)
return -ENOMEM;
len = 0;
for (i = optind; i < argc; i++)
len += sprintf(buf + len, "%s ", argv[i]);
*(buf + len) = '\n';
*(buf + len + 1) = 0;
pr_info("%s", buf);
free(buf);
return 0;
}
ret = log_print(flags, levels);
if (ret)
return 1;
if (delete_buf)
log_clean(10);
return 0;
}
BAREBOX_CMD_HELP_START(dmesg)
BAREBOX_CMD_HELP_TEXT("print or control the barebox message buffer")
BAREBOX_CMD_HELP_TEXT("Loglevels can be specified as number (0=emerg, 7=vdebug)")
BAREBOX_CMD_HELP_TEXT("Known debug loglevels are: emerg, alert, crit, err, warn, notice, info, debug,")
BAREBOX_CMD_HELP_TEXT("vdebug")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT ("-c", "Delete messages after printing them")
BAREBOX_CMD_HELP_OPT ("-d", "Show a time delta to the last message")
BAREBOX_CMD_HELP_OPT ("-e <msg>", "Emit a log message")
BAREBOX_CMD_HELP_OPT ("-l <loglevel>", "Restrict output to the given (comma-separated) list of levels")
BAREBOX_CMD_HELP_OPT ("-n <loglevel>", "Set level at which printing of messages is done to the console")
BAREBOX_CMD_HELP_OPT ("-r", "Print timestamp and log-level prefixes.")
BAREBOX_CMD_HELP_OPT ("-t", "Show timestamp informations")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(dmesg)
.cmd = do_dmesg,
BAREBOX_CMD_DESC("Print or control log messages")
BAREBOX_CMD_OPTS("[-cdert]")
BAREBOX_CMD_GROUP(CMD_GRP_INFO)
BAREBOX_CMD_HELP(cmd_dmesg_help)
BAREBOX_CMD_END
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