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
|
/* BEGIN_COMMON_COPYRIGHT_HEADER
* (c)LGPL2+
*
* LXQt - a lightweight, Qt based, desktop toolset
* https://lxqt.org
*
* Copyright: 2013 Razor team
* Authors:
* Kuzma Shapran <kuzma.shapran@gmail.com>
*
* This program or library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* END_COMMON_COPYRIGHT_HEADER */
#include "pipe_utils.h"
#include <unistd.h>
#include <fcntl.h>
void initBothPipeEnds(int fd[2])
{
fd[STDIN_FILENO] = -1;
fd[STDOUT_FILENO] = -1;
}
error_t createPipe(int fd[2])
{
error_t result = static_cast<error_t>(0);
if (pipe(fd) < 0)
{
result = static_cast<error_t>(errno);
}
if (!result)
{
fcntl(fd[STDIN_FILENO], F_SETFD, FD_CLOEXEC);
fcntl(fd[STDOUT_FILENO], F_SETFD, FD_CLOEXEC);
}
return result;
}
error_t readAll(int fd, void *data, size_t length)
{
while (length)
{
ssize_t bytes_read = read(fd, data, length);
if (bytes_read < 0)
{
return static_cast<error_t>(errno);
}
if (!bytes_read)
{
return static_cast<error_t>(-1);
}
data = reinterpret_cast<char *>(data) + bytes_read;
length -= bytes_read;
}
return static_cast<error_t>(0);
}
error_t writeAll(int fd, const void *data, size_t length)
{
while (length)
{
ssize_t bytes_written = write(fd, data, length);
if (bytes_written < 0)
{
return static_cast<error_t>(errno);
}
if (!bytes_written)
{
return static_cast<error_t>(-1);
}
data = reinterpret_cast<const char *>(data) + bytes_written;
length -= bytes_written;
}
return static_cast<error_t>(0);
}
void closeBothPipeEnds(int fd[2])
{
if (fd[STDIN_FILENO] != -1)
{
close(fd[STDIN_FILENO]);
fd[STDIN_FILENO] = -1;
}
if (fd[STDOUT_FILENO] != -1)
{
close(fd[STDOUT_FILENO]);
fd[STDOUT_FILENO] = -1;
}
}
|
