1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/* $Id: cmd-pipe-pane.c,v 1.13 2010-06-15 20:25:40 tcunha Exp $ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
/*
* Open pipe to redirect pane output. If already open, close first.
*/
int cmd_pipe_pane_exec(struct cmd *, struct cmd_ctx *);
void cmd_pipe_pane_error_callback(struct bufferevent *, short, void *);
const struct cmd_entry cmd_pipe_pane_entry = {
"pipe-pane", "pipep",
CMD_TARGET_PANE_USAGE "[-o] [command]",
CMD_ARG01, "o",
cmd_target_init,
cmd_target_parse,
cmd_pipe_pane_exec,
cmd_target_free,
cmd_target_print
};
int
cmd_pipe_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
{
struct cmd_target_data *data = self->data;
struct client *c;
struct window_pane *wp;
char *command;
int old_fd, pipe_fd[2], null_fd, mode;
if ((c = cmd_find_client(ctx, NULL)) == NULL)
return (-1);
if (cmd_find_pane(ctx, data->target, NULL, &wp) == NULL)
return (-1);
/* Destroy the old pipe. */
old_fd = wp->pipe_fd;
if (wp->pipe_fd != -1) {
bufferevent_free(wp->pipe_event);
close(wp->pipe_fd);
wp->pipe_fd = -1;
}
/* If no pipe command, that is enough. */
if (data->arg == NULL || *data->arg == '\0')
return (0);
/*
* With -o, only open the new pipe if there was no previous one. This
* allows a pipe to be toggled with a single key, for example:
*
* bind ^p pipep -o 'cat >>~/output'
*/
if (cmd_check_flag(data->chflags, 'o') && old_fd != -1)
return (0);
/* Open the new pipe. */
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_fd) != 0) {
ctx->error(ctx, "socketpair error: %s", strerror(errno));
return (-1);
}
/* Fork the child. */
switch (fork()) {
case -1:
ctx->error(ctx, "fork error: %s", strerror(errno));
return (-1);
case 0:
/* Child process. */
close(pipe_fd[0]);
clear_signals();
if (dup2(pipe_fd[1], STDIN_FILENO) == -1)
_exit(1);
if (pipe_fd[1] != STDIN_FILENO)
close(pipe_fd[1]);
null_fd = open(_PATH_DEVNULL, O_WRONLY, 0);
if (dup2(null_fd, STDOUT_FILENO) == -1)
_exit(1);
if (dup2(null_fd, STDERR_FILENO) == -1)
_exit(1);
if (null_fd != STDOUT_FILENO && null_fd != STDERR_FILENO)
close(null_fd);
command = status_replace(c, NULL, data->arg, time(NULL), 0);
execl(_PATH_BSHELL, "sh", "-c", command, (char *) NULL);
_exit(1);
default:
/* Parent process. */
close(pipe_fd[1]);
wp->pipe_fd = pipe_fd[0];
wp->pipe_off = EVBUFFER_LENGTH(wp->event->input);
wp->pipe_event = bufferevent_new(wp->pipe_fd,
NULL, NULL, cmd_pipe_pane_error_callback, wp);
bufferevent_enable(wp->pipe_event, EV_WRITE);
if ((mode = fcntl(wp->pipe_fd, F_GETFL)) == -1)
fatal("fcntl failed");
if (fcntl(wp->pipe_fd, F_SETFL, mode|O_NONBLOCK) == -1)
fatal("fcntl failed");
if (fcntl(wp->pipe_fd, F_SETFD, FD_CLOEXEC) == -1)
fatal("fcntl failed");
return (0);
}
}
/* ARGSUSED */
void
cmd_pipe_pane_error_callback(
unused struct bufferevent *bufev, unused short what, void *data)
{
struct window_pane *wp = data;
bufferevent_free(wp->pipe_event);
close(wp->pipe_fd);
wp->pipe_fd = -1;
}
|
