mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-19 13:17:56 +00:00
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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Copyright (C) 2014 Serval Project Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include "cli.h"
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#include "mem.h"
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#include "net.h"
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#include "str.h"
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#include "fdqueue.h"
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#include "console.h"
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struct command_state{
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struct sched_ent alarm;
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char line_buff[1024];
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size_t line_pos;
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struct cli_schema *cli_commands;
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};
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struct profile_total stdin_profile={
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.name="command_handler",
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};
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static void process_command(char *line, struct cli_schema *cli_commands){
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char *argv[16];
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int argc = parse_argv(line, ' ', argv, 16);
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struct cli_parsed parsed;
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switch (cli_parse(argc, (const char *const*)argv, cli_commands, NULL, &parsed)) {
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case 0:
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cli_invoke(&parsed, NULL);
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break;
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case 1:
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printf("Unknown command, try help\n");
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fflush(stdout);
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break;
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case 2:
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printf("Ambiguous command, try help\n");
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fflush(stdout);
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break;
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default:
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printf("Error\n");
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fflush(stdout);
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break;
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}
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}
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static void read_lines(struct sched_ent *alarm){
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struct command_state *state=(struct command_state *)alarm;
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ssize_t bytes = read(alarm->poll.fd, state->line_buff + state->line_pos, sizeof(state->line_buff) - state->line_pos);
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if (bytes<=0){
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// EOF?
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unwatch(alarm);
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alarm->poll.fd=-1;
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return;
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}
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size_t i = state->line_pos;
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size_t processed=0;
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state->line_pos+=bytes;
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char *line_start=state->line_buff;
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for (;i<state->line_pos;i++){
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if (state->line_buff[i]=='\n'){
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state->line_buff[i]=0;
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if (*line_start)
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process_command(line_start, state->cli_commands);
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processed=i+1;
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line_start = state->line_buff + processed;
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}
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}
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if (processed){
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// squash unprocessed data back to the start of the buffer
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state->line_pos -= processed;
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bcopy(state->line_buff, line_start, state->line_pos);
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}
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}
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struct command_state *command_register(struct cli_schema *commands, int fd){
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struct command_state *ret = emalloc_zero(sizeof(struct command_state));
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if (!ret)
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return NULL;
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ret->alarm.poll.fd=fd;
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ret->alarm.poll.events=POLLIN;
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ret->alarm.function=read_lines;
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ret->alarm.stats=&stdin_profile;
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ret->cli_commands = commands;
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watch(&ret->alarm);
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return ret;
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}
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uint8_t is_command_closed(struct command_state *state){
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return state->alarm.poll.fd==-1;
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}
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void command_close(struct command_state *state){
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if (is_watching(&state->alarm))
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unwatch(&state->alarm);
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state->alarm.poll.fd=-1;
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}
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void command_free(struct command_state *state){
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command_close(state);
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free(state);
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}
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