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f0635717b3
client-server protocol more resilient and make the protocol versioning work properly. In future, the only things requiring a protocol version bump will be changes in the message structs, and (when both client and server have this change) mixing different versions should nicely report an error message. As a side effect this also makes the code tidier, fixes a problem with the way errors reported during server startup were handled, and supports fd passing (which will be used in future). Looked over by eric@, thanks. Please note that mixing a client with this change with an older server or vice versa may cause tmux to crash or hang - tmux should be completely exited before upgrading.
91 lines
2.1 KiB
C
91 lines
2.1 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 <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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void
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client_fill_session(struct msg_command_data *data)
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{
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char *env, *ptr1, *ptr2, buf[256];
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size_t len;
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const char *errstr;
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long long ll;
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data->pid = -1;
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if ((env = getenv("TMUX")) == NULL)
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return;
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if ((ptr2 = strrchr(env, ',')) == NULL || ptr2 == env)
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return;
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for (ptr1 = ptr2 - 1; ptr1 > env && *ptr1 != ','; ptr1--)
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;
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if (*ptr1 != ',')
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return;
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ptr1++;
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ptr2++;
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len = ptr2 - ptr1 - 1;
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if (len > (sizeof buf) - 1)
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return;
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memcpy(buf, ptr1, len);
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buf[len] = '\0';
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ll = strtonum(buf, 0, LONG_MAX, &errstr);
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if (errstr != NULL)
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return;
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data->pid = ll;
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ll = strtonum(ptr2, 0, UINT_MAX, &errstr);
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if (errstr != NULL)
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return;
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data->idx = ll;
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}
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void
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client_write_server(
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struct client_ctx *cctx, enum msgtype type, void *buf, size_t len)
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{
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imsg_compose(&cctx->ibuf, type, PROTOCOL_VERSION, -1, -1, buf, len);
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}
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void
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client_suspend(void)
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{
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struct sigaction act;
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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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}
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