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authorEric Andersen <andersen@codepoet.org>1999-10-06 00:30:51 +0000
committerEric Andersen <andersen@codepoet.org>1999-10-06 00:30:51 +0000
commit4bea32abb5d25e3b83047c22fd3f4e8fae2479cd (patch)
treec8aad7a8b8c573c2421b7fb3e58fdd00a3c1fe9b /util-linux/more.c
parent2b69c40e8060934c115922c012737bd471956f09 (diff)
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Diffstat (limited to '')
-rw-r--r--util-linux/more.c169
1 files changed, 72 insertions, 97 deletions
diff --git a/util-linux/more.c b/util-linux/more.c
index 65409999b..2ea709278 100644
--- a/util-linux/more.c
+++ b/util-linux/more.c
@@ -1,110 +1,85 @@
1/*
2 * Mini more implementation for busybox
3 *
4 * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1#include "internal.h" 22#include "internal.h"
2#include <stdio.h> 23#include <stdio.h>
3#include <sys/types.h> 24#include <signal.h>
4#include <sys/stat.h>
5#include <sys/ioctl.h>
6#include <fcntl.h>
7
8#define BB_MORE_TERM
9
10#ifdef BB_MORE_TERM
11 #include <termios.h>
12 #include <signal.h>
13 25
14 FILE *cin; 26const char more_usage[] = "[file ...]";
15 struct termios initial_settings, new_settings;
16 27
17 void gotsig(int sig) {
18 tcsetattr(fileno(cin), TCSANOW, &initial_settings);
19 exit(0);
20 }
21#endif
22 28
23const char more_usage[] = "more [file]\n"
24"\n"
25"\tDisplays a file, one page at a time.\n"
26"\tIf there are no arguments, the standard input is displayed.\n";
27 29
28extern int 30extern int more_main(int argc, char **argv)
29more_fn(const struct FileInfo * i)
30{ 31{
31 FILE * f = stdin; 32 int c, lines=0;
32 int c; 33 int next_page=0, rows = 24, cols=79;
33 int lines = 0, tlines = 0; 34 struct stat st;
34 int next_page = 0; 35 FILE *file = stdin;
35 int rows = 24, cols = 79;
36#ifdef BB_MORE_TERM
37 long sizeb = 0;
38 struct stat st;
39 struct winsize win;
40#endif
41
42 if ( i ) {
43 if (! (f = fopen(i->source, "r") )) {
44 name_and_error(i->source);
45 return 1;
46 }
47 fstat(fileno(f), &st);
48 sizeb = st.st_size / 100;
49 }
50
51#ifdef BB_MORE_TERM
52 cin = fopen("/dev/tty", "r");
53 tcgetattr(fileno(cin),&initial_settings);
54 new_settings = initial_settings;
55 new_settings.c_lflag &= ~ICANON;
56 new_settings.c_lflag &= ~ECHO;
57 tcsetattr(fileno(cin), TCSANOW, &new_settings);
58
59 (void) signal(SIGINT, gotsig);
60 36
61 ioctl(STDOUT_FILENO, TIOCGWINSZ, &win); 37 if ( strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0 ) {
62 if (win.ws_row > 4) rows = win.ws_row - 2; 38 fprintf(stderr, "Usage: %s %s", *argv, more_usage);
63 if (win.ws_col > 0) cols = win.ws_col - 1; 39 return(FALSE);
40 }
41 argc--;
42 argv++;
64 43
44 while (argc-- > 0) {
45 file = fopen(*argv, "r");
46 if (file == NULL) {
47 perror(*argv);
48 return(FALSE);
49 }
50 fstat(fileno(file), &st);
65 51
52 while ((c = getc(file)) != EOF) {
53 if ( next_page ) {
54 int len=0;
55 next_page = 0;
56 lines=0;
57 len = fprintf(stdout, "--More-- (%d%% of %ld bytes)\n",
58 (int) (100*( (double) ftell(file) / (double) st.st_size )),
59 st.st_size);
60 fflush(stdout);
61 getc( stdin);
62#if 0
63 while(len-- > 0)
64 putc('\b', stdout);
65 while(len++ < cols)
66 putc('8', stdout);
67 while(len-- > 0)
68 putc('\b', stdout);
69 fflush(stdout);
66#endif 70#endif
67 71 }
68 while ( (c = getc(f)) != EOF ) { 72 if ( c == '\n' && ++lines == (rows + 1) )
69 if ( next_page ) { 73 next_page = 1;
70 char garbage; 74 putc(c, stdout);
71 int len;
72 tlines += lines;
73 lines = 0;
74 next_page = 0; //Percentage is based on bytes, not lines.
75 if ( i && i->source ) //It is not very acurate, but still useful.
76 len = printf("%s - %%%2ld - line: %d", i->source, (ftell(f) - sizeb - sizeb) / sizeb, tlines);
77 else
78 len = printf("line: %d", tlines);
79
80 fflush(stdout);
81#ifndef BB_MORE_TERM
82 read(2, &garbage, 1);
83#else
84 do {
85 fread(&garbage, 1, 1, cin);
86 } while ((garbage != ' ') && (garbage != '\n'));
87
88 if (garbage == '\n') {
89 lines = rows;
90 tlines -= rows;
91 }
92 garbage = 0;
93 //clear line, since tabs don't overwrite.
94 while(len-- > 0) putchar('\b');
95 while(len++ < cols) putchar(' ');
96 while(len-- > 0) putchar('\b');
97 fflush(stdout);
98#endif
99 }
100 putchar(c);
101 if ( c == '\n' && ++lines == (rows + 1) )
102 next_page = 1;
103 } 75 }
104 if ( f != stdin ) 76 fclose(file);
105 fclose(f); 77 fflush(stdout);
106#ifdef BB_MORE_TERM 78
107 gotsig(0); 79 argc--;
108#endif 80 argv++;
109 return 0; 81 }
82 return(TRUE);
110} 83}
84
85
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