Annotation of src/usr.bin/tmux/server-msg.c, Revision 1.1
1.1 ! nicm 1: /* $OpenBSD$ */
! 2:
! 3: /*
! 4: * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
! 5: *
! 6: * Permission to use, copy, modify, and distribute this software for any
! 7: * purpose with or without fee is hereby granted, provided that the above
! 8: * copyright notice and this permission notice appear in all copies.
! 9: *
! 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
! 15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
! 16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 17: */
! 18:
! 19: #include <sys/types.h>
! 20:
! 21: #include <errno.h>
! 22: #include <stdlib.h>
! 23: #include <string.h>
! 24: #include <time.h>
! 25: #include <unistd.h>
! 26:
! 27: #include "tmux.h"
! 28:
! 29: int server_msg_fn_command(struct hdr *, struct client *);
! 30: int server_msg_fn_identify(struct hdr *, struct client *);
! 31: int server_msg_fn_resize(struct hdr *, struct client *);
! 32: int server_msg_fn_exiting(struct hdr *, struct client *);
! 33: int server_msg_fn_unlock(struct hdr *, struct client *);
! 34: int server_msg_fn_wakeup(struct hdr *, struct client *);
! 35:
! 36: void printflike2 server_msg_fn_command_error(
! 37: struct cmd_ctx *, const char *, ...);
! 38: void printflike2 server_msg_fn_command_print(
! 39: struct cmd_ctx *, const char *, ...);
! 40: void printflike2 server_msg_fn_command_info(
! 41: struct cmd_ctx *, const char *, ...);
! 42:
! 43: struct server_msg {
! 44: enum hdrtype type;
! 45: int (*fn)(struct hdr *, struct client *);
! 46: };
! 47: const struct server_msg server_msg_table[] = {
! 48: { MSG_IDENTIFY, server_msg_fn_identify },
! 49: { MSG_COMMAND, server_msg_fn_command },
! 50: { MSG_RESIZE, server_msg_fn_resize },
! 51: { MSG_EXITING, server_msg_fn_exiting },
! 52: { MSG_UNLOCK, server_msg_fn_unlock },
! 53: { MSG_WAKEUP, server_msg_fn_wakeup },
! 54: };
! 55:
! 56: int
! 57: server_msg_dispatch(struct client *c)
! 58: {
! 59: struct hdr hdr;
! 60: const struct server_msg *msg;
! 61: u_int i;
! 62: int n;
! 63:
! 64: for (;;) {
! 65: if (BUFFER_USED(c->in) < sizeof hdr)
! 66: return (0);
! 67: memcpy(&hdr, BUFFER_OUT(c->in), sizeof hdr);
! 68: if (BUFFER_USED(c->in) < (sizeof hdr) + hdr.size)
! 69: return (0);
! 70: buffer_remove(c->in, sizeof hdr);
! 71:
! 72: for (i = 0; i < nitems(server_msg_table); i++) {
! 73: msg = server_msg_table + i;
! 74: if (msg->type == hdr.type) {
! 75: if ((n = msg->fn(&hdr, c)) != 0)
! 76: return (n);
! 77: break;
! 78: }
! 79: }
! 80: if (i == nitems(server_msg_table))
! 81: fatalx("unexpected message");
! 82: }
! 83: }
! 84:
! 85: void printflike2
! 86: server_msg_fn_command_error(struct cmd_ctx *ctx, const char *fmt, ...)
! 87: {
! 88: va_list ap;
! 89: char *msg;
! 90:
! 91: va_start(ap, fmt);
! 92: xvasprintf(&msg, fmt, ap);
! 93: va_end(ap);
! 94:
! 95: server_write_client(ctx->cmdclient, MSG_ERROR, msg, strlen(msg));
! 96: xfree(msg);
! 97: }
! 98:
! 99: void printflike2
! 100: server_msg_fn_command_print(struct cmd_ctx *ctx, const char *fmt, ...)
! 101: {
! 102: va_list ap;
! 103: char *msg;
! 104:
! 105: va_start(ap, fmt);
! 106: xvasprintf(&msg, fmt, ap);
! 107: va_end(ap);
! 108:
! 109: server_write_client(ctx->cmdclient, MSG_PRINT, msg, strlen(msg));
! 110: xfree(msg);
! 111: }
! 112:
! 113: void printflike2
! 114: server_msg_fn_command_info(struct cmd_ctx *ctx, const char *fmt, ...)
! 115: {
! 116: va_list ap;
! 117: char *msg;
! 118:
! 119: if (be_quiet)
! 120: return;
! 121:
! 122: va_start(ap, fmt);
! 123: xvasprintf(&msg, fmt, ap);
! 124: va_end(ap);
! 125:
! 126: server_write_client(ctx->cmdclient, MSG_PRINT, msg, strlen(msg));
! 127: xfree(msg);
! 128: }
! 129:
! 130: int
! 131: server_msg_fn_command(struct hdr *hdr, struct client *c)
! 132: {
! 133: struct msg_command_data data;
! 134: struct cmd_ctx ctx;
! 135: struct cmd_list *cmdlist;
! 136: struct cmd *cmd;
! 137:
! 138: if (hdr->size < sizeof data)
! 139: fatalx("bad MSG_COMMAND size");
! 140: buffer_read(c->in, &data, sizeof data);
! 141:
! 142: cmdlist = cmd_list_recv(c->in);
! 143: server_activity = time(NULL);
! 144:
! 145: ctx.error = server_msg_fn_command_error;
! 146: ctx.print = server_msg_fn_command_print;
! 147: ctx.info = server_msg_fn_command_info;
! 148:
! 149: ctx.msgdata = &data;
! 150: ctx.curclient = NULL;
! 151: ctx.cursession = NULL;
! 152:
! 153: ctx.cmdclient = c;
! 154:
! 155: if (data.pid != -1) {
! 156: TAILQ_FOREACH(cmd, cmdlist, qentry) {
! 157: if (cmd->entry->flags & CMD_CANTNEST) {
! 158: server_msg_fn_command_error(&ctx,
! 159: "sessions should be nested with care. "
! 160: "unset $TMUX to force");
! 161: cmd_list_free(cmdlist);
! 162: server_write_client(c, MSG_EXIT, NULL, 0);
! 163: return (0);
! 164: }
! 165: }
! 166: }
! 167:
! 168: if (cmd_list_exec(cmdlist, &ctx) != 1)
! 169: server_write_client(c, MSG_EXIT, NULL, 0);
! 170: cmd_list_free(cmdlist);
! 171: return (0);
! 172: }
! 173:
! 174: int
! 175: server_msg_fn_identify(struct hdr *hdr, struct client *c)
! 176: {
! 177: struct msg_identify_data data;
! 178: char *term;
! 179:
! 180: if (hdr->size < sizeof data)
! 181: fatalx("bad MSG_IDENTIFY size");
! 182: buffer_read(c->in, &data, sizeof data);
! 183: term = cmd_recv_string(c->in);
! 184:
! 185: log_debug("identify msg from client: %u,%u (%d)",
! 186: data.sx, data.sy, data.version);
! 187:
! 188: if (data.version != PROTOCOL_VERSION) {
! 189: #define MSG "protocol version mismatch"
! 190: server_write_client(c, MSG_ERROR, MSG, (sizeof MSG) - 1);
! 191: #undef MSG
! 192: return (0);
! 193: }
! 194:
! 195: c->tty.sx = data.sx;
! 196: c->tty.sy = data.sy;
! 197:
! 198: c->cwd = NULL;
! 199: if (*data.cwd != '\0')
! 200: c->cwd = xstrdup(data.cwd);
! 201:
! 202: data.tty[(sizeof data.tty) - 1] = '\0';
! 203: tty_init(&c->tty, data.tty, term);
! 204: if (data.flags & IDENTIFY_UTF8)
! 205: c->tty.flags |= TTY_UTF8;
! 206: if (data.flags & IDENTIFY_256COLOURS)
! 207: c->tty.term_flags |= TERM_256COLOURS;
! 208: else if (data.flags & IDENTIFY_88COLOURS)
! 209: c->tty.term_flags |= TERM_88COLOURS;
! 210: if (data.flags & IDENTIFY_HASDEFAULTS)
! 211: c->tty.term_flags |= TERM_HASDEFAULTS;
! 212: xfree(term);
! 213:
! 214: c->flags |= CLIENT_TERMINAL;
! 215:
! 216: return (0);
! 217: }
! 218:
! 219: int
! 220: server_msg_fn_resize(struct hdr *hdr, struct client *c)
! 221: {
! 222: struct msg_resize_data data;
! 223:
! 224: if (hdr->size != sizeof data)
! 225: fatalx("bad MSG_RESIZE size");
! 226: buffer_read(c->in, &data, sizeof data);
! 227:
! 228: log_debug("resize msg from client: %u,%u", data.sx, data.sy);
! 229:
! 230: c->tty.sx = data.sx;
! 231: if (c->tty.sx == 0)
! 232: c->tty.sx = 80;
! 233: c->tty.sy = data.sy;
! 234: if (c->tty.sy == 0)
! 235: c->tty.sy = 25;
! 236:
! 237: c->tty.cx = UINT_MAX;
! 238: c->tty.cy = UINT_MAX;
! 239: c->tty.rupper = UINT_MAX;
! 240: c->tty.rlower = UINT_MAX;
! 241:
! 242: recalculate_sizes();
! 243:
! 244: /* Always redraw this client. */
! 245: server_redraw_client(c);
! 246:
! 247: return (0);
! 248: }
! 249:
! 250: int
! 251: server_msg_fn_exiting(struct hdr *hdr, struct client *c)
! 252: {
! 253: if (hdr->size != 0)
! 254: fatalx("bad MSG_EXITING size");
! 255:
! 256: log_debug("exiting msg from client");
! 257:
! 258: c->session = NULL;
! 259:
! 260: tty_close(&c->tty, c->flags & CLIENT_SUSPENDED);
! 261:
! 262: server_write_client(c, MSG_EXITED, NULL, 0);
! 263:
! 264: return (0);
! 265: }
! 266:
! 267: int
! 268: server_msg_fn_unlock(struct hdr *hdr, struct client *c)
! 269: {
! 270: char *pass;
! 271:
! 272: if (hdr->size == 0)
! 273: fatalx("bad MSG_UNLOCK size");
! 274: pass = cmd_recv_string(c->in);
! 275:
! 276: log_debug("unlock msg from client");
! 277:
! 278: if (server_unlock(pass) != 0) {
! 279: #define MSG "bad password"
! 280: server_write_client(c, MSG_ERROR, MSG, (sizeof MSG) - 1);
! 281: server_write_client(c, MSG_EXIT, NULL, 0);
! 282: return (0);
! 283: #undef MSG
! 284: }
! 285:
! 286: server_write_client(c, MSG_EXIT, NULL, 0);
! 287:
! 288: return (0);
! 289: }
! 290:
! 291: int
! 292: server_msg_fn_wakeup(struct hdr *hdr, struct client *c)
! 293: {
! 294: if (hdr->size != 0)
! 295: fatalx("bad MSG_WAKEUP size");
! 296:
! 297: log_debug("wakeup msg from client");
! 298:
! 299: c->flags &= ~CLIENT_SUSPENDED;
! 300: tty_start_tty(&c->tty);
! 301: server_redraw_client(c);
! 302:
! 303: return (0);
! 304: }
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