mirror of
https://github.com/tmux/tmux.git
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abf3a5d50e
This moves the client-side loops are pretty much fully over to event-based only (tmux.c and client.c) but server-side (server.c and friends) treats libevent as a sort of clever poll, waking up after every event to run various things. Moving the server stuff over to bufferevents and timers and so on will come later.
127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2009 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 <errno.h>
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#include <fcntl.h>
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#include <paths.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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/*
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* Open pipe to redirect pane output. If already open, close first.
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*/
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int cmd_pipe_pane_exec(struct cmd *, struct cmd_ctx *);
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const struct cmd_entry cmd_pipe_pane_entry = {
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"pipe-pane", "pipep",
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CMD_TARGET_PANE_USAGE "[-o] [command]",
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CMD_ARG01, CMD_CHFLAG('o'),
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cmd_target_init,
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cmd_target_parse,
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cmd_pipe_pane_exec,
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cmd_target_free,
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cmd_target_print
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};
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int
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cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
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{
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struct cmd_target_data *data = self->data;
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struct window_pane *wp;
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int old_fd, pipe_fd[2], null_fd, mode;
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if (cmd_find_pane(ctx, data->target, NULL, &wp) == NULL)
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return (-1);
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/* Destroy the old pipe. */
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old_fd = wp->pipe_fd;
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if (wp->pipe_fd != -1) {
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buffer_destroy(wp->pipe_buf);
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close(wp->pipe_fd);
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wp->pipe_fd = -1;
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}
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/* If no pipe command, that is enough. */
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if (data->arg == NULL || *data->arg == '\0')
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return (0);
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/*
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* With -o, only open the new pipe if there was no previous one. This
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* allows a pipe to be toggled with a single key, for example:
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*
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* bind ^p pipep -o 'cat >>~/output'
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*/
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if (data->chflags & CMD_CHFLAG('o') && old_fd != -1)
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return (0);
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/* Open the new pipe. */
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if (pipe(pipe_fd) != 0) {
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ctx->error(ctx, "pipe error: %s", strerror(errno));
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return (-1);
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}
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/* Fork the child. */
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switch (fork()) {
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case -1:
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ctx->error(ctx, "fork error: %s", strerror(errno));
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return (-1);
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case 0:
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/* Child process. */
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close(pipe_fd[0]);
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server_signal_clear();
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if (dup2(pipe_fd[1], STDIN_FILENO) == -1)
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_exit(1);
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if (pipe_fd[1] != STDIN_FILENO)
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close(pipe_fd[1]);
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null_fd = open(_PATH_DEVNULL, O_WRONLY, 0);
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if (dup2(null_fd, STDOUT_FILENO) == -1)
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_exit(1);
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if (dup2(null_fd, STDERR_FILENO) == -1)
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_exit(1);
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if (null_fd != STDOUT_FILENO && null_fd != STDERR_FILENO)
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close(null_fd);
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execl(_PATH_BSHELL, "sh", "-c", data->arg, (char *) NULL);
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_exit(1);
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default:
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/* Parent process. */
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close(pipe_fd[1]);
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wp->pipe_fd = pipe_fd[0];
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wp->pipe_buf = buffer_create(BUFSIZ);
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wp->pipe_off = BUFFER_USED(wp->in);
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if ((mode = fcntl(wp->pipe_fd, F_GETFL)) == -1)
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fatal("fcntl failed");
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if (fcntl(wp->pipe_fd, F_SETFL, mode|O_NONBLOCK) == -1)
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fatal("fcntl failed");
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if (fcntl(wp->pipe_fd, F_SETFD, FD_CLOEXEC) == -1)
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fatal("fcntl failed");
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return (0);
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}
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return (0);
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}
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