Mercurial > hg > toybox

annotate toys/pending/more.c @ 1215:4eaac3e63fa7 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Cleanup freeramdisk: tabs to 2 spaces, square brackets for option name, do optional cleanup under if (CFG_TOYBOX_FREE) guard.
author Rob Landley <rob@landley.net>
date Sun, 09 Mar 2014 14:38:51 -0500
parents 972d4fc0c8a2
children 0ecfaa7022e8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1163
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
1 /* more.c - View FILE (or stdin) one screenful at a time.
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
2 *
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
3 * Copyright 2013 Bilal Qureshi <bilal.jmi@gmail.com>
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
4 *
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
5 * No Standard
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
6
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
7 USE_MORE(NEWTOY(more, NULL, TOYFLAG_USR|TOYFLAG_BIN))
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
8
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
9 config MORE
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
10 bool "more"
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
11 default n
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
12 help
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
13 Usage: more [FILE]...
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
14
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
15 View FILE (or stdin) one screenful at a time.
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
16 */
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
17
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
18 #define FOR_more
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
19 #include "toys.h"
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
20 #include <signal.h>
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
21
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
22 GLOBALS(
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
23 struct termios inf;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
24 int cin_fd;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
25 )
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
26
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
27 static void signal_handler(int sig)
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
28 {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
29 tcsetattr(TT.cin_fd, TCSANOW, &TT.inf);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
30 xputc('\n');
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
31 signal(sig, SIG_DFL);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
32 raise(sig);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
33 _exit(sig | 128);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
34 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
35
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
36 static void do_cat_operation(int fd, char *name)
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
37 {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
38 char *buf = NULL;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
39
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
40 if(toys.optc > 1) printf(":::::::::::::::::::::::\n"
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
41 "%s\n:::::::::::::::::::::::\n",name);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
42 for (; (buf = get_line(fd)); free(buf)) printf("%s\n", buf);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
43 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
44
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
45 void more_main()
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
46 {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
47 int ch, lines, input_key = 0, disp_more, more_msg_len;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
48 unsigned rows = 24, cols = 80;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
49 struct stat st;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
50 struct termios newf;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
51 FILE *fp, *cin;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
52
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
53 if (!isatty(STDOUT_FILENO) || !(cin = fopen("/dev/tty", "r"))) {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
54 loopfiles(toys.optargs, do_cat_operation);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
55 toys.exitval = 0;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
56 return;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
57 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
58
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
59 TT.cin_fd = fileno(cin);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
60 tcgetattr(TT.cin_fd,&TT.inf);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
61 //Prepare terminal for input
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
62 memcpy(&newf, &TT.inf, sizeof(struct termios));
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
63 newf.c_lflag &= ~(ICANON | ECHO);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
64 newf.c_cc[VMIN] = 1;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
65 newf.c_cc[VTIME] = 0;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
66 tcsetattr(TT.cin_fd, TCSANOW, &newf);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
67
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
68 sigatexit(signal_handler);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
69
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
70 do {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
71 fp = stdin;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
72 if (*toys.optargs && !(fp = fopen(*toys.optargs, "r"))) {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
73 perror_msg("'%s'", *toys.optargs);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
74 continue;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
75 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
76 st.st_size = disp_more = more_msg_len = lines = 0;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
77 fstat(fileno(fp), &st);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
78 terminal_size(&cols, &rows);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
79 rows--;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
80 if(toys.optc > 1) {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
81 printf(":::::::::::::::::::::::\n"
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
82 "%s\n:::::::::::::::::::::::\n",*toys.optargs);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
83 rows -= 3;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
84 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
85
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
86 while ((ch = getc(fp)) != EOF) {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
87 if (input_key != 'r' && disp_more) {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
88 more_msg_len = printf("--More-- ");
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
89 if (st.st_size)
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
90 more_msg_len += printf("(%d%% of %lld bytes)",
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
91 (int) (100 * ( (double) ftell(fp) / (double) st.st_size)),
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
92 st.st_size);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
93 fflush(NULL);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
94
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
95 while (1) {
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
96 input_key = getc(cin);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
97 input_key = tolower(input_key);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
98 printf("\r%*s\r", more_msg_len, ""); // Remove previous msg
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
99 if (input_key == ' ' || input_key == '\n' || input_key == 'q'
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
100 || input_key == 'r') break;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
101 more_msg_len = printf("(Enter:Next line Space:Next page Q:Quit R:Show the rest)");
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
102 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
103 more_msg_len = lines = disp_more = 0;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
104 if (input_key == 'q') goto stop;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
105 terminal_size(&cols, &rows);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
106 rows--;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
107 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
108
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
109 if (ch == '\n')
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
110 if (++lines >= rows || input_key == '\n') disp_more = 1;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
111 putchar(ch);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
112 }
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
113 fclose(fp);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
114 fflush(NULL);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
115 } while (*toys.optargs && *++toys.optargs);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
116
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
117 stop:
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
118 tcsetattr(TT.cin_fd, TCSANOW, &TT.inf);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
119 fclose(cin);
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
120 toys.exitval = 0;
972d4fc0c8a2 Two more commands (last and more) submitted by Ashwini Sharma.
Rob Landley <rob@landley.net>
parents:
diff changeset
121 }