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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* vi: set sw=4 ts=4: */
/*
* Mini more implementation for busybox
*
*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
*
* Latest version blended together by Erik Andersen <andersen@lineo.com>,
* based on the original more implementation by Bruce, and code from the
* Debian boot-floppies team.
*
* 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 02111-1307 USA
*
*/
#include "internal.h"
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/ioctl.h>
static const char more_usage[] = "more [file ...]\n";
/* ED: sparc termios is broken: revert back to old termio handling. */
#ifdef BB_FEATURE_USE_TERMIOS
#if #cpu(sparc)
# include <termio.h>
# define termios termio
# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
#else
# include <termios.h>
# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
# define getTermSettings(fd,argp) tcgetattr(fd, argp);
#endif
FILE *cin;
struct termios initial_settings, new_settings;
void gotsig(int sig)
{
setTermSettings(fileno(cin), &initial_settings);
fprintf(stdout, "\n");
exit(TRUE);
}
#endif
#define TERMINAL_WIDTH 79 /* not 80 in case terminal has linefold bug */
#define TERMINAL_HEIGHT 24
#if defined BB_FEATURE_AUTOWIDTH
#ifdef BB_FEATURE_USE_TERMIOS
static int terminal_width = 0;
#endif
static int terminal_height = 0;
#else
#define terminal_width TERMINAL_WIDTH
#define terminal_height TERMINAL_HEIGHT
#endif
extern int more_main(int argc, char **argv)
{
int c, lines = 0, input = 0;
int next_page = 0;
struct stat st;
FILE *file;
#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
struct winsize win = { 0, 0 };
#endif
argc--;
argv++;
if (argc > 0
&& (strcmp(*argv, "--help") == 0 || strcmp(*argv, "-h") == 0)) {
usage(more_usage);
}
do {
if (argc == 0) {
file = stdin;
} else
file = fopen(*argv, "r");
if (file == NULL) {
perror(*argv);
exit(FALSE);
}
fstat(fileno(file), &st);
#ifdef BB_FEATURE_USE_TERMIOS
cin = fopen("/dev/tty", "r");
if (!cin)
cin = fopen("/dev/console", "r");
getTermSettings(fileno(cin), &initial_settings);
new_settings = initial_settings;
new_settings.c_cc[VMIN] = 1;
new_settings.c_cc[VTIME] = 0;
new_settings.c_lflag &= ~ICANON;
new_settings.c_lflag &= ~ECHO;
setTermSettings(fileno(cin), &new_settings);
#ifdef BB_FEATURE_AUTOWIDTH
ioctl(fileno(stdout), TIOCGWINSZ, &win);
if (win.ws_row > 4)
terminal_height = win.ws_row - 2;
if (win.ws_col > 0)
terminal_width = win.ws_col - 1;
#endif
(void) signal(SIGINT, gotsig);
(void) signal(SIGQUIT, gotsig);
(void) signal(SIGTERM, gotsig);
#endif
while ((c = getc(file)) != EOF) {
if (next_page) {
int len = 0;
next_page = 0;
lines = 0;
len = fprintf(stdout, "--More-- ");
if (file != stdin) {
len += fprintf(stdout, "(%d%% of %ld bytes)",
(int) (100 *
((double) ftell(file) /
(double) st.st_size)),
st.st_size);
}
len += fprintf(stdout, "%s",
#ifdef BB_FEATURE_USE_TERMIOS
""
#else
"\n"
#endif
);
fflush(stdout);
#ifdef BB_FEATURE_USE_TERMIOS
input = getc(cin);
#else
input = getc(stdin);
#endif
#ifdef BB_FEATURE_USE_TERMIOS
/* Erase the "More" message */
while (--len >= 0)
putc('\b', stdout);
while (++len <= terminal_width)
putc(' ', stdout);
while (--len >= 0)
putc('\b', stdout);
fflush(stdout);
#endif
}
if (c == '\n') {
switch (input) {
case 'q':
goto end;
case '\n':
/* increment by just one line if we are at
* the end of this line*/
next_page = 1;
break;
}
if (++lines == terminal_height)
next_page = 1;
}
putc(c, stdout);
}
fclose(file);
fflush(stdout);
argv++;
} while (--argc > 0);
end:
#ifdef BB_FEATURE_USE_TERMIOS
gotsig(0);
#endif
exit(TRUE);
}
|
