mirror of https://github.com/tmux/tmux.git
160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "tmux.h"
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int client_msg_fn_detach(struct hdr *, struct client_ctx *, char **);
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int client_msg_fn_error(struct hdr *, struct client_ctx *, char **);
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int client_msg_fn_shutdown(struct hdr *, struct client_ctx *, char **);
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int client_msg_fn_exit(struct hdr *, struct client_ctx *, char **);
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int client_msg_fn_exited(struct hdr *, struct client_ctx *, char **);
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int client_msg_fn_suspend(struct hdr *, struct client_ctx *, char **);
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struct client_msg {
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enum hdrtype type;
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int (*fn)(struct hdr *, struct client_ctx *, char **);
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};
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struct client_msg client_msg_table[] = {
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{ MSG_DETACH, client_msg_fn_detach },
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{ MSG_ERROR, client_msg_fn_error },
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{ MSG_EXIT, client_msg_fn_exit },
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{ MSG_EXITED, client_msg_fn_exited },
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{ MSG_SHUTDOWN, client_msg_fn_shutdown },
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{ MSG_SUSPEND, client_msg_fn_suspend },
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};
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int
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client_msg_dispatch(struct client_ctx *cctx, char **error)
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{
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struct hdr hdr;
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struct client_msg *msg;
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u_int i;
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if (BUFFER_USED(cctx->srv_in) < sizeof hdr)
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return (1);
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memcpy(&hdr, BUFFER_OUT(cctx->srv_in), sizeof hdr);
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if (BUFFER_USED(cctx->srv_in) < (sizeof hdr) + hdr.size)
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return (1);
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buffer_remove(cctx->srv_in, sizeof hdr);
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for (i = 0; i < nitems(client_msg_table); i++) {
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msg = client_msg_table + i;
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if (msg->type == hdr.type) {
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if (msg->fn(&hdr, cctx, error) != 0)
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return (-1);
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return (0);
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}
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}
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fatalx("unexpected message");
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}
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int
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client_msg_fn_error(struct hdr *hdr, struct client_ctx *cctx, char **error)
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{
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if (hdr->size == SIZE_MAX)
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fatalx("bad MSG_ERROR size");
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*error = xmalloc(hdr->size + 1);
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buffer_read(cctx->srv_in, *error, hdr->size);
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(*error)[hdr->size] = '\0';
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return (-1);
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}
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int
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client_msg_fn_detach(
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struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
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{
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if (hdr->size != 0)
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fatalx("bad MSG_DETACH size");
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client_write_server(cctx, MSG_EXITING, NULL, 0);
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cctx->flags |= CCTX_DETACH;
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return (0);
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}
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int
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client_msg_fn_shutdown(
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struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
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{
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if (hdr->size != 0)
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fatalx("bad MSG_SHUTDOWN size");
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client_write_server(cctx, MSG_EXITING, NULL, 0);
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cctx->flags |= CCTX_SHUTDOWN;
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return (0);
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}
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int
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client_msg_fn_exit(
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struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
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{
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if (hdr->size != 0)
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fatalx("bad MSG_EXIT size");
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client_write_server(cctx, MSG_EXITING, NULL, 0);
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cctx->flags |= CCTX_EXIT;
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return (0);
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}
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int
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client_msg_fn_exited(
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struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
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{
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if (hdr->size != 0)
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fatalx("bad MSG_EXITED size");
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return (-1);
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}
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int
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client_msg_fn_suspend(
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struct hdr *hdr, unused struct client_ctx *cctx, unused char **error)
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{
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struct sigaction act;
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if (hdr->size != 0)
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fatalx("bad MSG_SUSPEND size");
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memset(&act, 0, sizeof act);
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sigemptyset(&act.sa_mask);
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act.sa_flags = SA_RESTART;
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act.sa_handler = SIG_DFL;
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if (sigaction(SIGTSTP, &act, NULL) != 0)
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fatal("sigaction failed");
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act.sa_handler = sighandler;
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if (sigaction(SIGCONT, &act, NULL) != 0)
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fatal("sigaction failed");
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kill(getpid(), SIGTSTP);
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return (0);
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}
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