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/*
* syslog - Syslog loggin service for Tcl
* A Tcl interface to the POSIX syslog service.
*
* Copyright (C) 2026 Massimo Manghi <mxmanghi@apache.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/>.
*/
#include <string.h>
#include <syslog.h>
#include "syslog.h"
#include "params.h"
extern SyslogGlobalStatus *g_status;
extern char* g_default_format;
extern int opt_class[];
extern int opt_code[];
extern const char* options[];
static void missing_option_value (Tcl_Interp* interp,char* cmd,Tcl_Obj* option)
{
Tcl_Obj* error_code_list = Tcl_NewObj();
Tcl_IncrRefCount(error_code_list);
Tcl_ListObjAppendElement(interp, error_code_list, Tcl_NewStringObj("missing_argument_value", -1));
Tcl_ListObjAppendElement(interp, error_code_list, option);
Tcl_SetObjErrorCode(interp, error_code_list);
Tcl_Obj* error_message = Tcl_NewStringObj("Missing option value for option '",-1);
Tcl_IncrRefCount(error_message);
Tcl_AppendObjToObj(error_message,option);
Tcl_AppendStringsToObj(error_message,"' in ",cmd,NULL);
Tcl_SetObjResult(interp,error_message);
Tcl_DecrRefCount(error_message);
Tcl_Obj* info_message = Tcl_NewStringObj("\n (missing option value condition detected while parsing command ",-1);
Tcl_IncrRefCount(info_message);
Tcl_AppendStringsToObj(info_message,cmd,")",NULL);
Tcl_AppendObjToErrorInfo(interp, info_message);
Tcl_DecrRefCount(info_message);
Tcl_DecrRefCount(error_code_list);
}
/*
* parse_options
*
*/
int parse_options (Tcl_Interp *interp, int objc, Tcl_Obj *CONST86 objv[],ParseArgsOptions* pao)
{
int index = 1;
int fchanged = 0;
int option_idx;
char* tcl_command = Tcl_GetString(objv[0]);
pao->status->facility = -1;
if (pao->status->format != g_default_format) {
Tcl_Free(pao->status->format);
pao->status->format = (char *) g_default_format;
}
while (index < objc) {
/* Read the docs! Tcl_GetIndexFromObj stores an
* error in the interpreter if the search
* string is not found in the string array.
* Setting it to NULL avoids this
*/
if (Tcl_GetIndexFromObj(NULL,objv[index],options,"option",TCL_EXACT,&option_idx) == TCL_ERROR) {
const char* argument = Tcl_GetString(objv[index]);
if (strcmp(argument,"--") == 0) {
/* end of options seqeunce, we proceed with the follwing opt */
if (index == objc-1) {
missing_option_value(interp,tcl_command,objv[index]);
return ERROR;
}
return fchanged;
} else if (argument[0] == '-') {
pao->unhandled_opt_index = index;
return INVALID_OPTION;
} else {
/* we hit a log message or log facility argument */
return fchanged;
}
}
if ((opt_class[option_idx] != UNDEFINED_OPTION_CLASS) && (opt_class[option_idx] & pao->option_class) == 0) {
pao->unhandled_opt_index = index;
return INVALID_OPTION_CLASS;
}
pao->modified_opt_class |= opt_class[option_idx];
switch (option_idx) {
case ident_idx:
{
if (index == objc-1) {
missing_option_value(interp,tcl_command,objv[index]);
return ERROR;
}
const char* ident = Tcl_GetString(objv[++index]);
size_t len = strlen(ident);
char *copy = (char *) Tcl_Alloc(len + 1);
memcpy(copy,ident,len + 1);
if (g_status->ident != NULL) {
Tcl_Free(g_status->ident);
}
g_status->ident = copy;
fchanged++;
pao->last_option_index = index;
break;
}
case log_ndelay_idx:
{
g_status->options = g_status->options | LOG_NDELAY;
fchanged++;
pao->last_option_index = index;
break;
}
case log_console_idx:
{
g_status->options = g_status->options | LOG_CONS;
fchanged++;
pao->last_option_index = index;
break;
}
case log_pid_idx:
{
g_status->options = g_status->options | LOG_PID;
fchanged++;
pao->last_option_index = index;
break;
}
case log_perror_idx:
{
g_status->options = g_status->options | LOG_PERROR;
fchanged++;
pao->last_option_index = index;
break;
}
case priority_idx:
case level_idx:
{
if (index == objc-1) {
missing_option_value(interp,tcl_command,objv[index]);
return ERROR;
}
const char *level_s = Tcl_GetString(objv[++index]);
int p = level_cli_to_code(interp,level_s);
if (p == ERROR) {
Tcl_SetObjResult(interp,Tcl_NewStringObj("Unknown level specified.",-1));
return ERROR;
}
pao->status->level = p;
fchanged++;
pao->last_option_index = index;
break;
}
case facility_idx:
{
if (index == objc-1) {
missing_option_value(interp,tcl_command,objv[index]);
return ERROR;
}
const char *facility_s = Tcl_GetString(objv[++index]);
int f = facility_cli_to_code(interp,facility_s);
if (f == ERROR) {
Tcl_SetObjResult(interp,Tcl_NewStringObj("Unknown facility specified.",-1));
return ERROR;
}
if (pao->facility_is_private) {
pao->modified_opt_class |= PER_THREAD_OPTION_CLASS;
pao->status->facility = f;
} else {
pao->modified_opt_class |= GLOBAL_OPTION_CLASS;
g_status->facility = f;
}
fchanged++;
pao->last_option_index = index;
break;
}
case format_idx:
{
if (index == objc-1) {
missing_option_value(interp,tcl_command,objv[index]);
return ERROR;
}
const char *format_s = Tcl_GetString(objv[++index]);
size_t len = strlen(format_s);
char *copy = (char *) Tcl_Alloc(len + 1);
memcpy(copy,format_s,len + 1);
if ((pao->status->format != NULL) && (pao->status->format != g_default_format)) {
Tcl_Free(pao->status->format);
}
pao->status->format = copy;
fchanged++;
pao->last_option_index = index;
break;
}
}
index++;
}
return fchanged;
}
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