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Diffstat (limited to 'i/pc104/initrd/conf/busybox/util-linux/more.c')
-rw-r--r--i/pc104/initrd/conf/busybox/util-linux/more.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/util-linux/more.c b/i/pc104/initrd/conf/busybox/util-linux/more.c
new file mode 100644
index 0000000..2a38ef3
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/util-linux/more.c
@@ -0,0 +1,173 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini more implementation for busybox
+ *
+ * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Latest version blended together by Erik Andersen <andersen@codepoet.org>,
+ * based on the original more implementation by Bruce, and code from the
+ * Debian boot-floppies team.
+ *
+ * Termios corrects by Vladimir Oleynik <dzo@simtreas.ru>
+ *
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
+ */
+
+#include "busybox.h"
+
+
+#if ENABLE_FEATURE_USE_TERMIOS
+static int cin_fileno;
+#include <termios.h>
+#define setTermSettings(fd, argp) tcsetattr(fd, TCSANOW, argp)
+#define getTermSettings(fd, argp) tcgetattr(fd, argp);
+
+static struct termios initial_settings, new_settings;
+
+static void set_tty_to_initial_mode(void)
+{
+ setTermSettings(cin_fileno, &initial_settings);
+}
+
+static void gotsig(int sig)
+{
+ putchar('\n');
+ exit(EXIT_FAILURE);
+}
+#endif /* FEATURE_USE_TERMIOS */
+
+
+int more_main(int argc, char **argv);
+int more_main(int argc, char **argv)
+{
+ int c, lines, input = 0;
+ int please_display_more_prompt = 0;
+ struct stat st;
+ FILE *file;
+ FILE *cin;
+ int len, page_height;
+ int terminal_width;
+ int terminal_height;
+
+ argv++;
+ /* Another popular pager, most, detects when stdout
+ * is not a tty and turns into cat. This makes sense. */
+ if (!isatty(STDOUT_FILENO))
+ return bb_cat(argv);
+ cin = fopen(CURRENT_TTY, "r");
+ if (!cin)
+ return bb_cat(argv);
+
+#if ENABLE_FEATURE_USE_TERMIOS
+ cin_fileno = fileno(cin);
+ getTermSettings(cin_fileno, &initial_settings);
+ new_settings = initial_settings;
+ new_settings.c_lflag &= ~ICANON;
+ new_settings.c_lflag &= ~ECHO;
+ new_settings.c_cc[VMIN] = 1;
+ new_settings.c_cc[VTIME] = 0;
+ setTermSettings(cin_fileno, &new_settings);
+ atexit(set_tty_to_initial_mode);
+ signal(SIGINT, gotsig);
+ signal(SIGQUIT, gotsig);
+ signal(SIGTERM, gotsig);
+#endif
+ please_display_more_prompt = 2;
+
+ do {
+ file = stdin;
+ if (*argv) {
+ file = fopen_or_warn(*argv, "r");
+ if (!file)
+ continue;
+ }
+ st.st_size = 0;
+ fstat(fileno(file), &st);
+
+ please_display_more_prompt &= ~1;
+ /* never returns w, h <= 1 */
+ get_terminal_width_height(fileno(cin), &terminal_width, &terminal_height);
+ terminal_width -= 1;
+ terminal_height -= 1;
+
+ len = 0;
+ lines = 0;
+ page_height = terminal_height;
+ while ((c = getc(file)) != EOF) {
+
+ if ((please_display_more_prompt & 3) == 3) {
+ len = printf("--More-- ");
+ if (/*file != stdin &&*/ st.st_size > 0) {
+ len += printf("(%d%% of %"OFF_FMT"d bytes)",
+ (int) (ftello(file)*100 / st.st_size),
+ st.st_size);
+ }
+ fflush(stdout);
+
+ /*
+ * We've just displayed the "--More--" prompt, so now we need
+ * to get input from the user.
+ */
+ input = getc(cin);
+#if !ENABLE_FEATURE_USE_TERMIOS
+ printf("\033[A"); /* up cursor */
+#endif
+ /* Erase the "More" message */
+ printf("\r%*s\r", len, "");
+ len = 0;
+ lines = 0;
+ /* Bottom line on page will become top line
+ * after one page forward. Thus -1: */
+ page_height = terminal_height - 1;
+ please_display_more_prompt &= ~1;
+
+ if (input == 'q')
+ goto end;
+ }
+
+ /*
+ * There are two input streams to worry about here:
+ *
+ * c : the character we are reading from the file being "mored"
+ * input : a character received from the keyboard
+ *
+ * If we hit a newline in the _file_ stream, we want to test and
+ * see if any characters have been hit in the _input_ stream. This
+ * allows the user to quit while in the middle of a file.
+ */
+ if (c == '\n') {
+ /* increment by just one line if we are at
+ * the end of this line */
+ if (input == '\n')
+ please_display_more_prompt |= 1;
+ /* Adjust the terminal height for any overlap, so that
+ * no lines get lost off the top. */
+ if (len >= terminal_width) {
+ int quot, rem;
+ quot = len / terminal_width;
+ rem = len - (quot * terminal_width);
+ page_height -= (quot - 1);
+ if (rem)
+ page_height--;
+ }
+ if (++lines >= page_height) {
+ please_display_more_prompt |= 1;
+ }
+ len = 0;
+ }
+ /*
+ * If we just read a newline from the file being 'mored' and any
+ * key other than a return is hit, scroll by one page
+ */
+ putc(c, stdout);
+ /* My small mind cannot fathom tabs, backspaces,
+ * and UTF-8 */
+ len++;
+ }
+ fclose(file);
+ fflush(stdout);
+ } while (*argv && *++argv);
+ end:
+ return 0;
+}