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
|
/*
* tardy - a tar post-processor
* Copyright (C) 1998, 1999, 2002 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate file input normals
*/
#include <ac/unistd.h>
#include <ac/fcntl.h>
#include <file/input/normal.h>
file_input_normal::~file_input_normal()
{
if (fd >= 0 && ::close(fd))
nfatal("close");
}
file_input_normal::file_input_normal()
: fn(), fd(-1)
{
fatal("default constructor is private (bug)");
}
file_input_normal::file_input_normal(const char *arg)
: fn(arg), fd(-1)
{
fd = ::open(arg, O_RDONLY);
if (fd < 0)
nfatal("cannot open");
}
file_input_normal::file_input_normal(const file_input_normal &arg)
: fn(arg.fn), fd(-1)
{
fd = dup(arg.fd);
if (fd < 0)
arg.nfatal("dup");
}
file_input_normal &
file_input_normal::operator = (const file_input_normal &arg)
{
if (fd >= 0 && close(fd))
nfatal("close");
fn = arg.fn;
fd = dup(arg.fd);
if (fd < 0)
arg.nfatal("dup");
return *this;
}
int
file_input_normal::read(void *buffer, int maximum_length)
const
{
int nbytes = ::read(fd, buffer, maximum_length);
if (nbytes < 0)
nfatal("read");
return nbytes;
}
const char *
file_input_normal::filename()
const
{
return fn;
}
|
