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crm_error.c
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crm_error.c
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/*
* Copyright 2012-2021 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU General Public License version 2
* or later (GPLv2+) WITHOUT ANY WARRANTY.
*/
#include <crm_internal.h>
#include <crm/common/cmdline_internal.h>
#include <crm/common/output_internal.h>
#include <crm/common/strings_internal.h>
#include <crm/crm.h>
#define SUMMARY "crm_error - display name or description of a Pacemaker error code"
struct {
gboolean as_exit_code;
gboolean as_rc;
gboolean with_name;
gboolean do_list;
} options;
static GOptionEntry entries[] = {
{ "name", 'n', 0, G_OPTION_ARG_NONE, &options.with_name,
"Show error's name with its description (useful for looking for sources "
"of the error in source code)",
NULL },
{ "list", 'l', 0, G_OPTION_ARG_NONE, &options.do_list,
"Show all known errors",
NULL },
{ "exit", 'X', 0, G_OPTION_ARG_NONE, &options.as_exit_code,
"Interpret as exit code rather than legacy function return value",
NULL },
{ "rc", 'r', 0, G_OPTION_ARG_NONE, &options.as_rc,
"Interpret as return code rather than legacy function return value",
NULL },
{ NULL }
};
static void
get_strings(int rc, const char **name, const char **str)
{
if (options.as_exit_code) {
*str = crm_exit_str((crm_exit_t) rc);
*name = crm_exit_name(rc);
} else if (options.as_rc) {
*str = pcmk_rc_str(rc);
*name = pcmk_rc_name(rc);
} else {
*str = pcmk_strerror(rc);
*name = pcmk_errorname(rc);
}
}
static GOptionContext *
build_arg_context(pcmk__common_args_t *args, GOptionGroup **group) {
GOptionContext *context = NULL;
context = pcmk__build_arg_context(args, NULL, group, "-- <rc> [...]");
pcmk__add_main_args(context, entries);
return context;
}
int
main(int argc, char **argv)
{
crm_exit_t exit_code = CRM_EX_OK;
int rc = pcmk_rc_ok;
int lpc;
const char *name = NULL;
const char *desc = NULL;
GError *error = NULL;
GOptionGroup *output_group = NULL;
pcmk__common_args_t *args = pcmk__new_common_args(SUMMARY);
gchar **processed_args = pcmk__cmdline_preproc(argv, NULL);
GOptionContext *context = build_arg_context(args, &output_group);
if (!g_option_context_parse_strv(context, &processed_args, &error)) {
exit_code = CRM_EX_USAGE;
goto done;
}
pcmk__cli_init_logging("crm_error", args->verbosity);
if (args->version) {
g_strfreev(processed_args);
pcmk__free_arg_context(context);
/* FIXME: When crm_error is converted to use formatted output, this can go. */
pcmk__cli_help('v', CRM_EX_USAGE);
}
if (options.do_list) {
int start, end, width;
// 256 is a hacky magic number that "should" be enough
if (options.as_rc) {
start = pcmk_rc_error - 256;
end = PCMK_CUSTOM_OFFSET;
width = 4;
} else {
start = 0;
end = 256;
width = 3;
}
for (rc = start; rc < end; rc++) {
if (rc == (pcmk_rc_error + 1)) {
// Values in between are reserved for callers, no use iterating
rc = pcmk_rc_ok;
}
get_strings(rc, &name, &desc);
if (pcmk__str_eq(name, "Unknown", pcmk__str_null_matches) || !strcmp(name, "CRM_EX_UNKNOWN")) {
// Undefined
} else if(options.with_name) {
printf("% .*d: %-26s %s\n", width, rc, name, desc);
} else {
printf("% .*d: %s\n", width, rc, desc);
}
}
} else {
if (g_strv_length(processed_args) < 2) {
char *help = g_option_context_get_help(context, TRUE, NULL);
fprintf(stderr, "%s", help);
g_free(help);
exit_code = CRM_EX_USAGE;
goto done;
}
/* Skip #1 because that's the program name. */
for (lpc = 1; processed_args[lpc] != NULL; lpc++) {
pcmk__scan_min_int(processed_args[lpc], &rc, INT_MIN);
get_strings(rc, &name, &desc);
if (options.with_name) {
printf("%s - %s\n", name, desc);
} else {
printf("%s\n", desc);
}
}
}
done:
g_strfreev(processed_args);
pcmk__free_arg_context(context);
pcmk__output_and_clear_error(error, NULL);
return exit_code;
}

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