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-rw-r--r--text-utils/more.c2100
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diff --git a/text-utils/more.c b/text-utils/more.c
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--- /dev/null
+++ b/text-utils/more.c
@@ -0,0 +1,2100 @@
+/*
+ * Copyright (C) 1980 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* more.c - General purpose tty output filter and file perusal program
+ *
+ * by Eric Shienbrood, UC Berkeley
+ *
+ * modified by Geoff Peck
+ * UCB to add underlining, single spacing
+ * modified by John Foderaro
+ * UCB to add -c and MORE environment variable
+ * modified by Erik Troan <ewt@redhat.com>
+ * to be more posix and so compile on linux/axp.
+ * modified by Kars de Jong <jongk@cs.utwente.nl>
+ * to use terminfo instead of termcap.
+ * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
+ * added Native Language Support
+ * 1999-03-19 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * more nls translatable strings
+ * 1999-05-09 aeb
+ * applied a RedHat patch (setjmp->sigsetjmp); without it a second
+ * ^Z would fail.
+ * 1999-05-09 aeb
+ * undone Kars' work, so that more works without libcurses (and
+ * hence can be in /bin with libcurses being in
+ * /usr/lib which may not be mounted). However, when termcap is not
+ * present curses can still be used.
+ * 2010-10-21 Davidlohr Bueso <dave@gnu.org>
+ * modified mem allocation handling for util-linux
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/param.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <setjmp.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+#include <regex.h>
+
+#if defined(HAVE_NCURSESW_TERM_H)
+# include <ncursesw/term.h>
+#elif defined(HAVE_NCURSES_TERM_H)
+# include <ncurses/term.h>
+#elif defined(HAVE_TERM_H)
+# include <term.h>
+#endif
+
+#include "strutils.h"
+#include "nls.h"
+#include "xalloc.h"
+#include "widechar.h"
+#include "closestream.h"
+
+#ifdef TEST_PROGRAM
+# define NON_INTERACTIVE_MORE 1
+#endif
+
+#define VI "vi" /* found on the user's path */
+
+#define BS "\b"
+#define BSB "\b \b"
+#define CARAT "^"
+#define RINGBELL '\007'
+
+#define MIN_LINE_SZ 256 /* minimal line_buf buffer size */
+#define ctrl(letter) (letter & 077)
+#define RUBOUT '\177'
+#define ESC '\033'
+#define QUIT '\034'
+#define SCROLL_LEN 11
+#define LINES_PER_PAGE 24
+#define NUM_COLUMNS 80
+#define TERMINAL_BUF 4096
+#define INIT_BUF 80
+#define SHELL_LINE 1000
+#define COMMAND_BUF 200
+#define REGERR_BUF NUM_COLUMNS
+
+#define TERM_AUTO_RIGHT_MARGIN "am"
+#define TERM_CEOL "xhp"
+#define TERM_CLEAR "clear"
+#define TERM_CLEAR_TO_LINE_END "el"
+#define TERM_CLEAR_TO_SCREEN_END "ed"
+#define TERM_COLS "cols"
+#define TERM_CURSOR_ADDRESS "cup"
+#define TERM_EAT_NEW_LINE "xenl"
+#define TERM_ENTER_UNDERLINE "smul"
+#define TERM_EXIT_STANDARD_MODE "rmso"
+#define TERM_EXIT_UNDERLINE "rmul"
+#define TERM_HARD_COPY "hc"
+#define TERM_HOME "home"
+#define TERM_LINE_DOWN "cud1"
+#define TERM_LINES "lines"
+#define TERM_OVER_STRIKE "os"
+#define TERM_PAD_CHAR "pad"
+#define TERM_STANDARD_MODE "smso"
+#define TERM_STD_MODE_GLITCH "xmc"
+#define TERM_UNDERLINE_CHAR "uc"
+#define TERM_UNDERLINE "ul"
+
+struct more_control {
+ struct termios output_tty; /* output terminal */
+ struct termios original_tty; /* original terminal settings */
+ long file_position; /* file position */
+ long file_size; /* file size */
+ int argv_position; /* argv[] position */
+ int lines_per_screen; /* screen size in lines */
+ int d_scroll_len; /* number of lines scrolled by 'd' */
+ int prompt_len; /* message prompt length */
+ int current_line; /* line we are currently at */
+ char **file_names; /* The list of file names */
+ int num_files; /* Number of files left to process */
+ char *shell; /* name of the shell to use */
+ int previous_shell; /* does previous shell command exist */
+ sigjmp_buf destination; /* siglongjmp() destination */
+ char *line_buf; /* line buffer */
+ size_t line_sz; /* size of line_buf buffer */
+ int lines_per_page; /* lines per page */
+ char *clear; /* clear screen */
+ char *erase_line; /* erase line */
+ char *enter_std; /* enter standout mode */
+ char *exit_std; /* exit standout mode */
+ char *enter_underline; /* enter underline mode */
+ char *exit_underline; /* exit underline mode */
+ char *underline_ch; /* underline character */
+ char *backspace_ch; /* backspace character */
+ char *go_home; /* go to home */
+ char *cursor_addr; /* cursor movement */
+ char home_position[40]; /* contains cursor movement to home */
+ char *clear_rest; /* clear rest of screen */
+ int num_columns; /* number of columns */
+ char *previous_search; /* previous search() buf[] item */
+ struct {
+ long row_num; /* row number */
+ long line_num; /* line number */
+ } context,
+ screen_start;
+ int last_key_command; /* previous more key command */
+ int last_key_arg; /* previous key command argument */
+ int last_colon_command; /* is a colon-prefixed key command */
+ char shell_line[SHELL_LINE];
+ unsigned int
+ bad_stdout:1, /* true if overwriting does not turn off standout */
+ catch_suspend:1, /* we should catch the SIGTSTP signal */
+ clear_line_ends:1, /* do not scroll, paint each screen from the top */
+ dumb_tty:1, /* is terminal type known */
+ eat_newline:1, /* is newline ignored after 80 cols */
+ enable_underlining:1, /* underline as best we can */
+ erase_input_ok:1, /* is erase input supported */
+ erase_previous_ok:1, /* is erase previous supported */
+ first_file:1, /* is the input file the first in list */
+ fold_long_lines:1, /* fold long lines */
+ hard_tabs:1, /* print spaces instead of '\t' */
+ hard_tty:1, /* is this hard copy terminal (a printer or such) */
+ is_paused:1, /* is output paused */
+ no_quit_dialog:1, /* suppress quit dialog */
+ no_scroll:1, /* do not scroll, clear the screen and then display text */
+ no_tty_in:1, /* is input in interactive mode */
+ no_tty_out:1, /* is output in interactive mode */
+ report_errors:1, /* is an error reported */
+ run_previous_command:1, /* run previous key command */
+ squeeze_spaces:1, /* suppress white space */
+ starting_up:1, /* is startup completed */
+ stdout_glitch:1, /* terminal has standout mode glitch */
+ stop_after_formfeed:1, /* stop after form feeds */
+ suppress_bell:1, /* suppress bell */
+ underline_glitch:1, /* terminal has underline mode glitch */
+ underline_state:1, /* current UL state */
+ waiting_input:1, /* is waiting user input */
+ within_file:1, /* true if we are within a file, false if we are between files */
+ wrap_margin:1; /* set if automargins */
+};
+
+/* FIXME: global_ctl is used in signal handlers. */
+struct more_control *global_ctl;
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ fputs(USAGE_HEADER, out);
+ fprintf(out, _(" %s [options] <file>...\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("A file perusal filter for CRT viewing.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -d display help instead of ringing bell\n"), out);
+ fputs(_(" -f count logical rather than screen lines\n"), out);
+ fputs(_(" -l suppress pause after form feed\n"), out);
+ fputs(_(" -c do not scroll, display text and clean line ends\n"), out);
+ fputs(_(" -p do not scroll, clean screen and display text\n"), out);
+ fputs(_(" -s squeeze multiple blank lines into one\n"), out);
+ fputs(_(" -u suppress underlining\n"), out);
+ fputs(_(" -<number> the number of lines per screenful\n"), out);
+ fputs(_(" +<number> display file beginning from line number\n"), out);
+ fputs(_(" +/<string> display file beginning from search string match\n"), out);
+
+ fputs(USAGE_SEPARATOR, out);
+ printf( " --help %s\n", USAGE_OPTSTR_HELP);
+ printf( " -V, --version %s\n", USAGE_OPTSTR_VERSION);
+ printf(USAGE_MAN_TAIL("more(1)"));
+ exit(EXIT_SUCCESS);
+}
+
+
+static void arg_parser(struct more_control *ctl, char *s)
+{
+ int seen_num = 0;
+
+ while (*s != '\0') {
+ switch (*s) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ if (!seen_num) {
+ ctl->lines_per_screen = 0;
+ seen_num = 1;
+ }
+ ctl->lines_per_screen = ctl->lines_per_screen * 10 + *s - '0';
+ break;
+ case 'd':
+ ctl->suppress_bell = 1;
+ break;
+ case 'l':
+ ctl->stop_after_formfeed = 0;
+ break;
+ case 'f':
+ ctl->fold_long_lines = 0;
+ break;
+ case 'p':
+ ctl->no_scroll = 1;
+ break;
+ case 'c':
+ ctl->clear_line_ends = 1;
+ break;
+ case 's':
+ ctl->squeeze_spaces = 1;
+ break;
+ case 'u':
+ ctl->enable_underlining = 0;
+ break;
+ case '-':
+ case ' ':
+ case '\t':
+ break;
+ case 'V':
+ printf(UTIL_LINUX_VERSION);
+ exit(EXIT_SUCCESS);
+ break;
+ default:
+ warnx(_("unknown option -%s"), s);
+ errtryhelp(EXIT_FAILURE);
+ break;
+ }
+ s++;
+ }
+}
+
+static void more_fseek(struct more_control *ctl, FILE *stream, long pos)
+{
+ ctl->file_position = pos;
+ fseek(stream, pos, 0);
+}
+
+static int more_getc(struct more_control *ctl, FILE *stream)
+{
+ ctl->file_position++;
+ return getc(stream);
+}
+
+static int more_ungetc(struct more_control *ctl, int c, FILE *stream)
+{
+ ctl->file_position--;
+ return ungetc(c, stream);
+}
+
+/* magic --
+ * check for file magic numbers. This code would best be shared
+ * with the file(1) program or, perhaps, more should not try to be
+ * so smart. */
+static int check_magic(FILE *f, char *fs)
+{
+ signed char twobytes[2];
+
+ /* don't try to look ahead if the input is unseekable */
+ if (fseek(f, 0L, SEEK_SET))
+ return 0;
+
+ if (fread(twobytes, 2, 1, f) == 1) {
+ switch (twobytes[0] + (twobytes[1] << 8)) {
+ case 0407: /* a.out obj */
+ case 0410: /* a.out exec */
+ case 0413: /* a.out demand exec */
+ case 0405:
+ case 0411:
+ case 0177545:
+ case 0x457f: /* simple ELF detection */
+ printf(_("\n******** %s: Not a text file ********\n\n"),
+ fs);
+ return 1;
+ }
+ }
+ fseek(f, 0L, SEEK_SET); /* rewind() not necessary */
+ return 0;
+}
+
+/* Check whether the file named by fs is an ASCII file which the user may
+ * access. If it is, return the opened file. Otherwise return NULL. */
+static FILE *checkf(struct more_control *ctl, char *fs, int *clearfirst)
+{
+ struct stat st;
+ FILE *f;
+ int c;
+
+ if (stat(fs, &st) == -1) {
+ fflush(stdout);
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ warn(_("stat of %s failed"), fs);
+ return NULL;
+ }
+ if ((st.st_mode & S_IFMT) == S_IFDIR) {
+ printf(_("\n*** %s: directory ***\n\n"), fs);
+ return NULL;
+ }
+ ctl->current_line = 0;
+ ctl->file_position = 0;
+ if ((f = fopen(fs, "r")) == NULL) {
+ fflush(stdout);
+ warn(_("cannot open %s"), fs);
+ return NULL;
+ }
+ if (check_magic(f, fs)) {
+ fclose(f);
+ return NULL;
+ }
+ fcntl(fileno(f), F_SETFD, FD_CLOEXEC);
+ c = more_getc(ctl, f);
+ *clearfirst = (c == '\f');
+ more_ungetc(ctl, c, f);
+ if ((ctl->file_size = st.st_size) == 0)
+ ctl->file_size = LONG_MAX;
+ return f;
+}
+
+static void prepare_line_buffer(struct more_control *ctl)
+{
+ size_t sz = ctl->num_columns * 4;
+
+ if (ctl->line_sz >= sz)
+ return;
+
+ if (sz < MIN_LINE_SZ)
+ sz = MIN_LINE_SZ;
+
+ /* alloc sz and extra space for \n\0 */
+ ctl->line_buf = xrealloc(ctl->line_buf, sz + 2);
+ ctl->line_sz = sz;
+}
+
+/* Get a logical line */
+static int get_line(struct more_control *ctl, FILE *f, int *length)
+{
+ int c;
+ char *p;
+ int column;
+ static int column_wrap;
+
+#ifdef HAVE_WIDECHAR
+ size_t i;
+ wchar_t wc;
+ int wc_width;
+ mbstate_t state, state_bak; /* Current status of the stream. */
+ char mbc[MB_LEN_MAX]; /* Buffer for one multibyte char. */
+ size_t mblength; /* Byte length of multibyte char. */
+ size_t mbc_pos = 0; /* Position of the MBC. */
+ int use_mbc_buffer_flag = 0; /* If 1, mbc has data. */
+ int break_flag = 0; /* If 1, exit while(). */
+ long file_position_bak = ctl->file_position;
+
+ memset(&state, '\0', sizeof(mbstate_t));
+#endif
+
+ prepare_line_buffer(ctl);
+
+ p = ctl->line_buf;
+ column = 0;
+ c = more_getc(ctl, f);
+ if (column_wrap && c == '\n') {
+ ctl->current_line++;
+ c = more_getc(ctl, f);
+ }
+ while (p < &ctl->line_buf[ctl->line_sz - 1]) {
+#ifdef HAVE_WIDECHAR
+ if (ctl->fold_long_lines && use_mbc_buffer_flag && MB_CUR_MAX > 1) {
+ use_mbc_buffer_flag = 0;
+ state_bak = state;
+ mbc[mbc_pos++] = c;
+ process_mbc:
+ mblength = mbrtowc(&wc, mbc, mbc_pos, &state);
+
+ switch (mblength) {
+ case (size_t)-2: /* Incomplete multibyte character. */
+ use_mbc_buffer_flag = 1;
+ state = state_bak;
+ break;
+
+ case (size_t)-1: /* Invalid as a multibyte character. */
+ *p++ = mbc[0];
+ state = state_bak;
+ column++;
+ file_position_bak++;
+ if (column >= ctl->num_columns) {
+ more_fseek(ctl, f, file_position_bak);
+ } else {
+ memmove(mbc, mbc + 1, --mbc_pos);
+ if (mbc_pos > 0) {
+ mbc[mbc_pos] = '\0';
+ goto process_mbc;
+ }
+ }
+ break;
+
+ default:
+ wc_width = wcwidth(wc);
+ if (column + wc_width > ctl->num_columns) {
+ more_fseek(ctl, f, file_position_bak);
+ break_flag = 1;
+ } else {
+ for (i = 0; p < &ctl->line_buf[ctl->line_sz - 1] &&
+ i < mbc_pos; i++)
+ *p++ = mbc[i];
+ if (wc_width > 0)
+ column += wc_width;
+ }
+ }
+
+ if (break_flag || column >= ctl->num_columns)
+ break;
+
+ c = more_getc(ctl, f);
+ continue;
+ }
+#endif /* HAVE_WIDECHAR */
+ if (c == EOF) {
+ if (p > ctl->line_buf) {
+ *p = '\0';
+ *length = p - ctl->line_buf;
+ return column;
+ }
+ *length = p - ctl->line_buf;
+ return EOF;
+ }
+ if (c == '\n') {
+ ctl->current_line++;
+ break;
+ }
+
+ *p++ = c;
+ if (c == '\t') {
+ if (!ctl->hard_tabs || (column < ctl->prompt_len && !ctl->hard_tty)) {
+ if (ctl->hard_tabs && ctl->erase_line && !ctl->dumb_tty) {
+ column = 1 + (column | 7);
+ putp(ctl->erase_line);
+ ctl->prompt_len = 0;
+ } else {
+ for (--p; p < &ctl->line_buf[ctl->line_sz - 1];) {
+ *p++ = ' ';
+ if ((++column & 7) == 0)
+ break;
+ }
+ if (column >= ctl->prompt_len)
+ ctl->prompt_len = 0;
+ }
+ } else
+ column = 1 + (column | 7);
+ } else if (c == '\b' && column > 0) {
+ column--;
+ } else if (c == '\r') {
+ int next = more_getc(ctl, f);
+ if (next == '\n') {
+ p--;
+ ctl->current_line++;
+ break;
+ }
+ more_ungetc(ctl, c, f);
+ column = 0;
+ } else if (c == '\f' && ctl->stop_after_formfeed) {
+ p[-1] = '^';
+ *p++ = 'L';
+ column += 2;
+ ctl->is_paused = 1;
+ } else if (c == EOF) {
+ *length = p - ctl->line_buf;
+ return column;
+ } else {
+#ifdef HAVE_WIDECHAR
+ if (ctl->fold_long_lines && MB_CUR_MAX > 1) {
+ memset(mbc, '\0', MB_LEN_MAX);
+ mbc_pos = 0;
+ mbc[mbc_pos++] = c;
+ state_bak = state;
+
+ mblength = mbrtowc(&wc, mbc, mbc_pos, &state);
+ /* The value of mblength is always less than 2 here. */
+ switch (mblength) {
+ case (size_t)-2:
+ p--;
+ file_position_bak = ctl->file_position - 1;
+ state = state_bak;
+ use_mbc_buffer_flag = 1;
+ break;
+
+ case (size_t)-1:
+ state = state_bak;
+ column++;
+ break;
+
+ default:
+ wc_width = wcwidth(wc);
+ if (wc_width > 0)
+ column += wc_width;
+ }
+ } else
+#endif /* HAVE_WIDECHAR */
+ {
+ if (isprint(c))
+ column++;
+ }
+ }
+
+ if (column >= ctl->num_columns && ctl->fold_long_lines)
+ break;
+#ifdef HAVE_WIDECHAR
+ if (use_mbc_buffer_flag == 0 && p >= &ctl->line_buf[ctl->line_sz - 1 - 4])
+ /* don't read another char if there is no space for
+ * whole multibyte sequence */
+ break;
+#endif
+ c = more_getc(ctl, f);
+ }
+ if (column >= ctl->num_columns && ctl->num_columns > 0) {
+ if (!ctl->wrap_margin) {
+ *p++ = '\n';
+ }
+ }
+ column_wrap = column == ctl->num_columns && ctl->fold_long_lines;
+ if (column_wrap && ctl->eat_newline && ctl->wrap_margin) {
+ *p++ = '\n'; /* simulate normal wrap */
+ }
+ *length = p - ctl->line_buf;
+ *p = 0;
+ return column;
+}
+
+/* Erase the rest of the prompt, assuming we are starting at column col. */
+static void erase_prompt(struct more_control *ctl, int col)
+{
+
+ if (ctl->prompt_len == 0)
+ return;
+ if (ctl->hard_tty) {
+ putchar('\n');
+ } else {
+ if (col == 0)
+ putchar('\r');
+ if (!ctl->dumb_tty && ctl->erase_line)
+ putp(ctl->erase_line);
+ else
+ printf("%*s", ctl->prompt_len - col, "");
+ }
+ ctl->prompt_len = 0;
+}
+
+#ifdef HAVE_WIDECHAR
+static UL_ASAN_BLACKLIST size_t xmbrtowc(wchar_t *wc, const char *s, size_t n,
+ mbstate_t *mbstate)
+{
+ const size_t mblength = mbrtowc(wc, s, n, mbstate);
+ if (mblength == (size_t)-2 || mblength == (size_t)-1)
+ return 1;
+ return mblength;
+}
+#endif
+
+static int would_underline(char *s, int n)
+{
+ if (n < 2)
+ return 0;
+ if ((s[0] == '_' && s[1] == '\b') || (s[1] == '\b' && s[2] == '_'))
+ return 1;
+ return 0;
+}
+
+/* Print a buffer of n characters */
+static void print_buf(struct more_control *ctl, char *s, int n)
+{
+ char c; /* next output character */
+ int state; /* next output char's UL state */
+
+ while (--n >= 0)
+ if (!ctl->enable_underlining)
+ putchar(*s++);
+ else {
+ if (*s == ' ' && ctl->underline_state == 0 && ctl->underline_glitch
+ && would_underline(s + 1, n - 1)) {
+ s++;
+ continue;
+ }
+ if ((state = would_underline(s, n)) != 0) {
+ c = (*s == '_') ? s[2] : *s;
+ n -= 2;
+ s += 3;
+ } else
+ c = *s++;
+ if (state != ctl->underline_state) {
+ if (c == ' ' && state == 0 && ctl->underline_glitch
+ && would_underline(s, n - 1))
+ state = 1;
+ else
+ putp(state ? ctl->enter_underline : ctl->exit_underline);
+ }
+ if (c != ' ' || ctl->underline_state == 0 || state != 0
+ || ctl->underline_glitch == 0)
+#ifdef HAVE_WIDECHAR
+ {
+ wchar_t wc;
+ size_t mblength;
+ mbstate_t mbstate;
+ memset(&mbstate, '\0', sizeof(mbstate_t));
+ s--;
+ n++;
+ mblength = xmbrtowc(&wc, s, n, &mbstate);
+ while (mblength--)
+ putchar(*s++);
+ n += mblength;
+ }
+#else
+ putchar(c);
+#endif /* HAVE_WIDECHAR */
+ if (state && *ctl->underline_ch) {
+ fputs(ctl->backspace_ch, stdout);
+ putp(ctl->underline_ch);
+ }
+ ctl->underline_state = state;
+ }
+}
+
+/* Erase the current line entirely */
+static void kill_line(struct more_control *ctl)
+{
+ erase_prompt(ctl, 0);
+ if (!ctl->erase_line || ctl->dumb_tty)
+ putchar('\r');
+}
+
+static void output_prompt(struct more_control *ctl, char *filename)
+{
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ else if (ctl->prompt_len > 0)
+ kill_line(ctl);
+ if (!ctl->hard_tty) {
+ ctl->prompt_len = 0;
+ if (ctl->enter_std && ctl->exit_std) {
+ putp(ctl->enter_std);
+ ctl->prompt_len += (2 * ctl->stdout_glitch);
+ }
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ ctl->prompt_len += printf(_("--More--"));
+ if (filename != NULL) {
+ ctl->prompt_len += printf(_("(Next file: %s)"), filename);
+ } else if (!ctl->no_tty_in) {
+ ctl->prompt_len +=
+ printf("(%d%%)",
+ (int)((ctl->file_position * 100) / ctl->file_size));
+ }
+ if (ctl->suppress_bell) {
+ ctl->prompt_len +=
+ printf(_("[Press space to continue, 'q' to quit.]"));
+ }
+ if (ctl->enter_std && ctl->exit_std)
+ putp(ctl->exit_std);
+ if (ctl->clear_line_ends)
+ putp(ctl->clear_rest);
+ fflush(stdout);
+ } else
+ fputc(RINGBELL, stderr);
+ ctl->waiting_input++;
+}
+
+static void reset_tty(void)
+{
+ if (global_ctl->no_tty_out)
+ return;
+ if (global_ctl->underline_state) {
+ putp(global_ctl->exit_underline);
+ fflush(stdout);
+ global_ctl->underline_state = 0;
+ }
+ global_ctl->output_tty.c_lflag |= ICANON | ECHO;
+ global_ctl->output_tty.c_cc[VMIN] = global_ctl->original_tty.c_cc[VMIN];
+ global_ctl->output_tty.c_cc[VTIME] = global_ctl->original_tty.c_cc[VTIME];
+ tcsetattr(STDERR_FILENO, TCSANOW, &global_ctl->original_tty);
+}
+
+/* Clean up terminal state and exit. Also come here if interrupt signal received */
+static void __attribute__((__noreturn__)) more_exit(int dummy __attribute__((__unused__)))
+{
+ /* May be executed as a signal handler as well as by main process.
+ *
+ * The _exit() may wait for pending I/O for really long time, be sure
+ * that signal handler is not executed in this time to avoid double
+ * de-initialization (free() calls, etc.).
+ */
+ signal(SIGINT, SIG_IGN);
+
+ reset_tty();
+ if (global_ctl->clear_line_ends) {
+ putchar('\r');
+ putp(global_ctl->erase_line);
+ fflush(stdout);
+ } else if (!global_ctl->clear_line_ends && (global_ctl->prompt_len > 0)) {
+ kill_line(global_ctl);
+ fflush(stdout);
+ } else
+ fputc('\n', stderr);
+ free(global_ctl->previous_search);
+ free(global_ctl->line_buf);
+ _exit(EXIT_SUCCESS);
+}
+
+static int read_user_input(struct more_control *ctl)
+{
+ unsigned char c;
+
+ errno = 0;
+ if (read(STDERR_FILENO, &c, 1) <= 0) {
+ if (errno != EINTR)
+ more_exit(0);
+ else
+ c = ctl->output_tty.c_cc[VKILL];
+ }
+ return c;
+}
+
+/* Read a decimal number from the terminal. Set cmd to the non-digit
+ * which terminates the number. */
+static int read_number(struct more_control *ctl, char *cmd)
+{
+ int i;
+ char ch;
+
+ i = 0;
+ ch = ctl->output_tty.c_cc[VKILL];
+ for (;;) {
+ ch = read_user_input(ctl);
+ if (isdigit(ch))
+ i = i * 10 + ch - '0';
+ else if ((cc_t) ch == ctl->output_tty.c_cc[VKILL])
+ i = 0;
+ else {
+ *cmd = ch;
+ break;
+ }
+ }
+ return i;
+}
+
+/* Change displayed file from command line list to next nskip, where nskip
+ * is relative position in argv and can be negative, that is a previous
+ * file. */
+static void change_file(struct more_control *ctl, int nskip)
+{
+ if (nskip == 0)
+ return;
+ if (nskip > 0) {
+ if (ctl->argv_position + nskip > ctl->num_files - 1)
+ nskip = ctl->num_files - ctl->argv_position - 1;
+ } else if (ctl->within_file)
+ ctl->argv_position++;
+ ctl->argv_position += nskip;
+ if (ctl->argv_position < 0)
+ ctl->argv_position = 0;
+ puts(_("\n...Skipping "));
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ if (nskip > 0)
+ fputs(_("...Skipping to file "), stdout);
+ else
+ fputs(_("...Skipping back to file "), stdout);
+ puts(ctl->file_names[ctl->argv_position]);
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ putchar('\n');
+ ctl->argv_position--;
+}
+
+static void show(struct more_control *ctl, char c)
+{
+ if ((c < ' ' && c != '\n' && c != ESC) || c == RUBOUT) {
+ c += (c == RUBOUT) ? -0100 : 0100;
+ fputs(CARAT, stderr);
+ ctl->prompt_len++;
+ }
+ fputc(c, stderr);
+ ctl->prompt_len++;
+}
+
+static void more_error(struct more_control *ctl, char *mess)
+{
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ else
+ kill_line(ctl);
+ ctl->prompt_len += strlen(mess);
+ if (ctl->enter_std && ctl->exit_std) {
+ putp(ctl->enter_std);
+ fputs(mess, stdout);
+ putp(ctl->exit_std);
+ } else
+ fputs(mess, stdout);
+ fflush(stdout);
+ ctl->report_errors++;
+ siglongjmp(ctl->destination, 1);
+}
+
+static void erase_one_column(struct more_control *ctl)
+{
+ if (ctl->erase_previous_ok)
+ fputs(BSB, stderr);
+ else
+ fputs(BS, stderr);
+}
+
+static void ttyin(struct more_control *ctl, char buf[], int nmax, char pchar)
+{
+ char *sp;
+ int c;
+ int slash = 0;
+ int maxlen;
+
+ sp = buf;
+ maxlen = 0;
+ while (sp - buf < nmax) {
+ if (ctl->prompt_len > maxlen)
+ maxlen = ctl->prompt_len;
+ c = read_user_input(ctl);
+ if (c == '\\') {
+ slash++;
+ } else if (((cc_t) c == ctl->output_tty.c_cc[VERASE]) && !slash) {
+ if (sp > buf) {
+#ifdef HAVE_WIDECHAR
+ if (MB_CUR_MAX > 1) {
+ wchar_t wc;
+ size_t pos = 0, mblength;
+ mbstate_t state, state_bak;
+
+ memset(&state, '\0', sizeof(mbstate_t));
+
+ while (1) {
+ state_bak = state;
+ mblength =
+ mbrtowc(&wc, buf + pos,
+ sp - buf, &state);
+
+ state = (mblength == (size_t)-2
+ || mblength ==
+ (size_t)-1) ? state_bak
+ : state;
+ mblength =
+ (mblength == (size_t)-2
+ || mblength == (size_t)-1
+ || mblength ==
+ 0) ? 1 : mblength;
+
+ if (buf + pos + mblength >= sp)
+ break;
+
+ pos += mblength;
+ }
+
+ if (mblength == 1) {
+ erase_one_column(ctl);
+ } else {
+ int wc_width;
+ wc_width = wcwidth(wc);
+ wc_width =
+ (wc_width <
+ 1) ? 1 : wc_width;
+ while (wc_width--) {
+ erase_one_column(ctl);
+ }
+ }
+
+ while (mblength--) {
+ --ctl->prompt_len;
+ --sp;
+ }
+ } else
+#endif /* HAVE_WIDECHAR */
+ {
+ --ctl->prompt_len;
+ erase_one_column(ctl);
+ --sp;
+ }
+
+ if ((*sp < ' ' && *sp != '\n') || *sp == RUBOUT) {
+ --ctl->prompt_len;
+ erase_one_column(ctl);
+ }
+ continue;
+ } else {
+ if (!ctl->erase_line)
+ ctl->prompt_len = maxlen;
+ siglongjmp(ctl->destination, 1);
+ }
+ } else if (((cc_t) c == ctl->output_tty.c_cc[VKILL]) && !slash) {
+ if (ctl->hard_tty) {
+ show(ctl, c);
+ putchar('\n');
+ putchar(pchar);
+ } else {
+ putchar('\r');
+ putchar(pchar);
+ if (ctl->erase_line)
+ erase_prompt(ctl, 1);
+ else if (ctl->erase_input_ok)
+ while (ctl->prompt_len-- > 1)
+ fputs(BSB, stderr);
+ ctl->prompt_len = 1;
+ }
+ sp = buf;
+ fflush(stdout);
+ continue;
+ }
+ if (slash && ((cc_t) c == ctl->output_tty.c_cc[VKILL]
+ || (cc_t) c == ctl->output_tty.c_cc[VERASE])) {
+ erase_one_column(ctl);
+ --sp;
+ }
+ if (c != '\\')
+ slash = 0;
+ *sp++ = c;
+ if ((c < ' ' && c != '\n' && c != ESC) || c == RUBOUT) {
+ c += (c == RUBOUT) ? -0100 : 0100;
+ fputs(CARAT, stderr);
+ ctl->prompt_len++;
+ }
+ if (c != '\n' && c != ESC) {
+ fputc(c, stderr);
+ ctl->prompt_len++;
+ } else
+ break;
+ }
+ *--sp = '\0';
+ if (!ctl->erase_line)
+ ctl->prompt_len = maxlen;
+ if (sp - buf >= nmax - 1)
+ more_error(ctl, _("Line too long"));
+}
+
+static int expand(struct more_control *ctl, char **outbuf, char *inbuf)
+{
+ char *inpstr;
+ char *outstr;
+ char c;
+ char *temp;
+ int changed = 0;
+ int tempsz, xtra, offset;
+
+ xtra = strlen(ctl->file_names[ctl->argv_position]) + strlen(ctl->shell_line) + 1;
+ tempsz = 200 + xtra;
+ temp = xmalloc(tempsz);
+ inpstr = inbuf;
+ outstr = temp;
+ while ((c = *inpstr++) != '\0') {
+ offset = outstr - temp;
+ if (tempsz - offset - 1 < xtra) {
+ tempsz += 200 + xtra;
+ temp = xrealloc(temp, tempsz);
+ outstr = temp + offset;
+ }
+ switch (c) {
+ case '%':
+ if (!ctl->no_tty_in) {
+ strcpy(outstr, ctl->file_names[ctl->argv_position]);
+ outstr += strlen(ctl->file_names[ctl->argv_position]);
+ changed++;
+ } else
+ *outstr++ = c;
+ break;
+ case '!':
+ if (!ctl->previous_shell)
+ more_error(ctl, _
+ ("No previous command to substitute for"));
+ strcpy(outstr, ctl->shell_line);
+ outstr += strlen(ctl->shell_line);
+ changed++;
+ break;
+ case '\\':
+ if (*inpstr == '%' || *inpstr == '!') {
+ *outstr++ = *inpstr++;
+ break;
+ }
+ /* fallthrough */
+ default:
+ *outstr++ = c;
+ }
+ }
+ *outstr++ = '\0';
+ *outbuf = temp;
+ return changed;
+}
+
+static void set_tty(struct more_control *ctl)
+{
+ ctl->output_tty.c_lflag &= ~(ICANON | ECHO);
+ ctl->output_tty.c_cc[VMIN] = 1; /* read at least 1 char */
+ ctl->output_tty.c_cc[VTIME] = 0; /* no timeout */
+ tcsetattr(STDERR_FILENO, TCSANOW, &ctl->output_tty);
+}
+
+/* Come here if a quit signal is received */
+static void sigquit_handler(int dummy __attribute__((__unused__)))
+{
+ signal(SIGQUIT, SIG_IGN);
+ if (!global_ctl->waiting_input) {
+ putchar('\n');
+ if (!global_ctl->starting_up) {
+ signal(SIGQUIT, sigquit_handler);
+ siglongjmp(global_ctl->destination, 1);
+ } else
+ global_ctl->is_paused = 1;
+ } else if (!global_ctl->suppress_bell && global_ctl->no_quit_dialog) {
+ global_ctl->prompt_len += fprintf(stderr, _("[Use q or Q to quit]"));
+ global_ctl->no_quit_dialog = 0;
+ }
+ signal(SIGQUIT, sigquit_handler);
+}
+
+/* Come here when we get a suspend signal from the terminal */
+static void sigtstp_handler(int dummy __attribute__((__unused__)))
+{
+ sigset_t signals, oldmask;
+
+ /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */
+ signal(SIGTTOU, SIG_IGN);
+ reset_tty();
+ fflush(stdout);
+ signal(SIGTTOU, SIG_DFL);
+ /* Send the TSTP signal to suspend our process group */
+ signal(SIGTSTP, SIG_DFL);
+
+ /* unblock SIGTSTP or we won't be able to suspend ourself */
+ sigemptyset(&signals);
+ sigaddset(&signals, SIGTSTP);
+ sigprocmask(SIG_UNBLOCK, &signals, &oldmask);
+
+ kill(0, SIGTSTP);
+ /* Pause for station break */
+
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+
+ /* We're back */
+ signal(SIGTSTP, sigtstp_handler);
+ set_tty(global_ctl);
+ if (global_ctl->waiting_input)
+ siglongjmp(global_ctl->destination, 1);
+}
+
+static void execute(struct more_control *ctl, char *filename, char *cmd, ...)
+{
+ int id;
+ int n;
+ va_list argp;
+ char *arg;
+ char **args;
+ int argcount;
+
+ fflush(stdout);
+ reset_tty();
+ for (n = 10; (id = fork()) < 0 && n > 0; n--)
+ sleep(5);
+ if (id == 0) {
+ int errsv;
+ if (!isatty(STDIN_FILENO)) {
+ close(STDIN_FILENO);
+ open("/dev/tty", 0);
+ }
+
+ va_start(argp, cmd);
+ arg = va_arg(argp, char *);
+ argcount = 0;
+ while (arg) {
+ argcount++;
+ arg = va_arg(argp, char *);
+ }
+ va_end(argp);
+
+ args = alloca(sizeof(char *) * (argcount + 1));
+ args[argcount] = NULL;
+
+ va_start(argp, cmd);
+ arg = va_arg(argp, char *);
+ argcount = 0;
+ while (arg) {
+ args[argcount] = arg;
+ argcount++;
+ arg = va_arg(argp, char *);
+ }
+ va_end(argp);
+
+ execvp(cmd, args);
+ errsv = errno;
+ fputs(_("exec failed\n"), stderr);
+ exit(errsv == ENOENT ? EX_EXEC_ENOENT : EX_EXEC_FAILED);
+ }
+ if (id > 0) {
+ signal(SIGINT, SIG_IGN);
+ signal(SIGQUIT, SIG_IGN);
+ if (ctl->catch_suspend)
+ signal(SIGTSTP, SIG_DFL);
+ while (wait(NULL) > 0)
+ /* nothing */ ;
+ signal(SIGINT, more_exit);
+ signal(SIGQUIT, sigquit_handler);
+ if (ctl->catch_suspend)
+ signal(SIGTSTP, sigtstp_handler);
+ } else
+ fputs(_("can't fork\n"), stderr);
+ set_tty(ctl);
+ puts("------------------------");
+ output_prompt(ctl, filename);
+}
+
+static void run_shell(struct more_control *ctl, char *filename)
+{
+ char cmdbuf[COMMAND_BUF];
+ int rc;
+ char *expanded;
+
+ kill_line(ctl);
+ putchar('!');
+ fflush(stdout);
+ ctl->prompt_len = 1;
+ if (ctl->run_previous_command)
+ fputs(ctl->shell_line, stdout);
+ else {
+ ttyin(ctl, cmdbuf, sizeof(cmdbuf) - 2, '!');
+ expanded = NULL;
+ rc = expand(ctl, &expanded, cmdbuf);
+ if (expanded) {
+ if (strlen(expanded) < sizeof(ctl->shell_line))
+ strcpy(ctl->shell_line, expanded);
+ else
+ rc = -1;
+ free(expanded);
+ }
+ if (rc < 0) {
+ fputs(_(" Overflow\n"), stderr);
+ output_prompt(ctl, filename);
+ return;
+ } else if (rc > 0) {
+ kill_line(ctl);
+ ctl->prompt_len = printf("!%s", ctl->shell_line);
+ }
+ }
+ fflush(stdout);
+ fputc('\n', stderr);
+ ctl->prompt_len = 0;
+ ctl->previous_shell = 1;
+ execute(ctl, filename, ctl->shell, ctl->shell, "-c", ctl->shell_line, 0);
+}
+
+/* Execute a colon-prefixed command. Returns <0 if not a command that
+ * should cause more of the file to be printed. */
+static int colon_command(struct more_control *ctl, char *filename, int cmd, int nlines)
+{
+ char ch;
+
+ if (cmd == 0)
+ ch = read_user_input(ctl);
+ else
+ ch = cmd;
+ ctl->last_colon_command = ch;
+ switch (ch) {
+ case 'f':
+ kill_line(ctl);
+ if (!ctl->no_tty_in)
+ ctl->prompt_len =
+ printf(_("\"%s\" line %d"), ctl->file_names[ctl->argv_position], ctl->current_line);
+ else
+ ctl->prompt_len = printf(_("[Not a file] line %d"), ctl->current_line);
+ fflush(stdout);
+ return -1;
+ case 'n':
+ if (nlines == 0) {
+ if (ctl->argv_position >= ctl->num_files - 1)
+ more_exit(0);
+ nlines++;
+ }
+ putchar('\r');
+ erase_prompt(ctl, 0);
+ change_file(ctl, nlines);
+ return 0;
+ case 'p':
+ if (ctl->no_tty_in) {
+ fputc(RINGBELL, stderr);
+ return -1;
+ }
+ putchar('\r');
+ erase_prompt(ctl, 0);
+ if (nlines == 0)
+ nlines++;
+ change_file(ctl, -nlines);
+ return 0;
+ case '!':
+ run_shell(ctl, filename);
+ return -1;
+ case 'q':
+ case 'Q':
+ more_exit(0);
+ default:
+ fputc(RINGBELL, stderr);
+ return -1;
+ }
+}
+
+/* Skip n lines in the file f */
+static void skip_lines(struct more_control *ctl, int n, FILE *f)
+{
+ int c;
+
+ while (n > 0) {
+ while ((c = more_getc(ctl, f)) != '\n')
+ if (c == EOF)
+ return;
+ n--;
+ ctl->current_line++;
+ }
+}
+
+/* Clear the screen */
+static void more_clear_screen(struct more_control *ctl)
+{
+ if (ctl->clear && !ctl->hard_tty) {
+ putp(ctl->clear);
+ /* Put out carriage return so that system doesn't get
+ * confused by escape sequences when expanding tabs */
+ putchar('\r');
+ ctl->prompt_len = 0;
+ }
+}
+
+static void read_line(struct more_control *ctl, FILE *f)
+{
+ int c;
+ char *p;
+
+ prepare_line_buffer(ctl);
+
+ p = ctl->line_buf;
+ while ((c = more_getc(ctl, f)) != '\n' && c != EOF
+ && (size_t)(p - ctl->line_buf) < ctl->line_sz - 1)
+ *p++ = c;
+ if (c == '\n')
+ ctl->current_line++;
+ *p = '\0';
+}
+
+/* Search for nth occurrence of regular expression contained in buf in
+ * the file */
+static void search(struct more_control *ctl, char buf[], FILE *file, int n)
+{
+ long startline = ctl->file_position;
+ long line1 = startline;
+ long line2 = startline;
+ long line3;
+ int lncount;
+ int saveln, rc;
+ regex_t re;
+
+ ctl->context.line_num = saveln = ctl->current_line;
+ ctl->context.row_num = startline;
+ lncount = 0;
+ if (!buf)
+ goto notfound;
+ if ((rc = regcomp(&re, buf, REG_NOSUB)) != 0) {
+ char s[REGERR_BUF];
+ regerror(rc, &re, s, sizeof s);
+ more_error(ctl, s);
+ }
+ while (!feof(file)) {
+ line3 = line2;
+ line2 = line1;
+ line1 = ctl->file_position;
+ read_line(ctl, file);
+ lncount++;
+ if (regexec(&re, ctl->line_buf, 0, NULL, 0) == 0) {
+ if (--n == 0) {
+ if (lncount > 3 || (lncount > 1 && ctl->no_tty_in)) {
+ putchar('\n');
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ fputs(_("...skipping\n"), stdout);
+ }
+ if (!ctl->no_tty_in) {
+ ctl->current_line -=
+ (lncount >= 3 ? 3 : lncount);
+ more_fseek(ctl, file, line3);
+ if (ctl->no_scroll) {
+ if (ctl->clear_line_ends) {
+ putp(ctl->go_home);
+ putp(ctl->erase_line);
+ } else
+ more_clear_screen(ctl);
+ }
+ } else {
+ kill_line(ctl);
+ if (ctl->no_scroll) {
+ if (ctl->clear_line_ends) {
+ putp(ctl->go_home);
+ putp(ctl->erase_line);
+ } else
+ more_clear_screen(ctl);
+ }
+ puts(ctl->line_buf);
+ }
+ break;
+ }
+ }
+ }
+ regfree(&re);
+ if (feof(file)) {
+ if (!ctl->no_tty_in) {
+ ctl->current_line = saveln;
+ more_fseek(ctl, file, startline);
+ } else {
+ fputs(_("\nPattern not found\n"), stdout);
+ more_exit(0);
+ }
+ free(ctl->previous_search);
+ ctl->previous_search = NULL;
+notfound:
+ more_error(ctl, _("Pattern not found"));
+ }
+}
+
+/* Read a command and do it. A command consists of an optional integer
+ * argument followed by the command character. Return the number of
+ * lines to display in the next screenful. If there is nothing more to
+ * display in the current file, zero is returned. */
+static int more_key_command(struct more_control *ctl, char *filename, FILE *f)
+{
+ int nlines;
+ int retval = 0;
+ int c;
+ char colonch;
+ int done;
+ char comchar, cmdbuf[INIT_BUF];
+
+ done = 0;
+ if (!ctl->report_errors)
+ output_prompt(ctl, filename);
+ else
+ ctl->report_errors = 0;
+ for (;;) {
+ nlines = read_number(ctl, &comchar);
+ ctl->run_previous_command = colonch = 0;
+ if (comchar == '.') { /* Repeat last command */
+ ctl->run_previous_command++;
+ comchar = ctl->last_key_command;
+ nlines = ctl->last_key_arg;
+ if (ctl->last_key_command == ':')
+ colonch = ctl->last_colon_command;
+ }
+ ctl->last_key_command = comchar;
+ ctl->last_key_arg = nlines;
+ if ((cc_t) comchar == ctl->output_tty.c_cc[VERASE]) {
+ kill_line(ctl);
+ output_prompt(ctl, filename);
+ continue;
+ }
+ switch (comchar) {
+ case ':':
+ retval = colon_command(ctl, filename, colonch, nlines);
+ if (retval >= 0)
+ done++;
+ break;
+ case 'b':
+ case ctrl('B'):
+ {
+ int initline;
+
+ if (ctl->no_tty_in) {
+ fputc(RINGBELL, stderr);
+ return -1;
+ }
+
+ if (nlines == 0)
+ nlines++;
+
+ putchar('\r');
+ erase_prompt(ctl, 0);
+ putchar('\n');
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ printf(P_("...back %d page",
+ "...back %d pages", nlines),
+ nlines);
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ putchar('\n');
+
+ initline = ctl->current_line - ctl->lines_per_screen * (nlines + 1);
+ if (!ctl->no_scroll)
+ --initline;
+ if (initline < 0)
+ initline = 0;
+ more_fseek(ctl, f, 0L);
+ ctl->current_line = 0; /* skip_lines() will make current_line correct */
+ skip_lines(ctl, initline, f);
+ if (!ctl->no_scroll) {
+ retval = ctl->lines_per_screen + 1;
+ } else {
+ retval = ctl->lines_per_screen;
+ }
+ done = 1;
+ break;
+ }
+ case ' ':
+ case 'z':
+ if (nlines == 0)
+ nlines = ctl->lines_per_screen;
+ else if (comchar == 'z')
+ ctl->lines_per_screen = nlines;
+ retval = nlines;
+ done = 1;
+ break;
+ case 'd':
+ case ctrl('D'):
+ if (nlines != 0)
+ ctl->d_scroll_len = nlines;
+ retval = ctl->d_scroll_len;
+ done = 1;
+ break;
+ case 'q':
+ case 'Q':
+ more_exit(0);
+ case 's':
+ case 'f':
+ case ctrl('F'):
+ if (nlines == 0)
+ nlines++;
+ if (comchar == 'f')
+ nlines *= ctl->lines_per_screen;
+ putchar('\r');
+ erase_prompt(ctl, 0);
+ putchar('\n');
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ printf(P_("...skipping %d line",
+ "...skipping %d lines", nlines),
+ nlines);
+
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ putchar('\n');
+
+ while (nlines > 0) {
+ while ((c = more_getc(ctl, f)) != '\n')
+ if (c == EOF) {
+ retval = 0;
+ done++;
+ goto endsw;
+ }
+ ctl->current_line++;
+ nlines--;
+ }
+ retval = ctl->lines_per_screen;
+ done = 1;
+ break;
+ case '\n':
+ if (nlines != 0)
+ ctl->lines_per_screen = nlines;
+ else
+ nlines = 1;
+ retval = nlines;
+ done = 1;
+ break;
+ case '\f':
+ if (!ctl->no_tty_in) {
+ more_clear_screen(ctl);
+ more_fseek(ctl, f, ctl->screen_start.row_num);
+ ctl->current_line = ctl->screen_start.line_num;
+ retval = ctl->lines_per_screen;
+ done = 1;
+ break;
+ } else {
+ fputc(RINGBELL, stderr);
+ break;
+ }
+ case '\'':
+ if (!ctl->no_tty_in) {
+ kill_line(ctl);
+ fputs(_("\n***Back***\n\n"), stdout);
+ more_fseek(ctl, f, ctl->context.row_num);
+ ctl->current_line = ctl->context.line_num;
+ retval = ctl->lines_per_screen;
+ done = 1;
+ break;
+ } else {
+ fputc(RINGBELL, stderr);
+ break;
+ }
+ case '=':
+ kill_line(ctl);
+ ctl->prompt_len = printf("%d", ctl->current_line);
+ fflush(stdout);
+ break;
+ case 'n':
+ if (!ctl->previous_search) {
+ more_error(ctl, _("No previous regular expression"));
+ break;
+ }
+ ctl->run_previous_command++;
+ /* fallthrough */
+ case '/':
+ if (nlines == 0)
+ nlines++;
+ kill_line(ctl);
+ putchar('/');
+ ctl->prompt_len = 1;
+ fflush(stdout);
+ if (ctl->run_previous_command) {
+ fputc('\r', stderr);
+ search(ctl, ctl->previous_search, f, nlines);
+ } else {
+ ttyin(ctl, cmdbuf, sizeof(cmdbuf) - 2, '/');
+ fputc('\r', stderr);
+ free(ctl->previous_search);
+ ctl->previous_search = xstrdup(cmdbuf);
+ search(ctl, cmdbuf, f, nlines);
+ }
+ retval = ctl->lines_per_screen - 1;
+ done = 1;
+ break;
+ case '!':
+ run_shell(ctl, filename);
+ break;
+ case '?':
+ case 'h':
+ if (ctl->no_scroll)
+ more_clear_screen(ctl);
+ fputs(_("\n"
+ "Most commands optionally preceded by integer argument k. "
+ "Defaults in brackets.\n"
+ "Star (*) indicates argument becomes new default.\n"), stdout);
+ puts("---------------------------------------"
+ "----------------------------------------");
+ fputs(_
+ ("<space> Display next k lines of text [current screen size]\n"
+ "z Display next k lines of text [current screen size]*\n"
+ "<return> Display next k lines of text [1]*\n"
+ "d or ctrl-D Scroll k lines [current scroll size, initially 11]*\n"
+ "q or Q or <interrupt> Exit from more\n"
+ "s Skip forward k lines of text [1]\n"
+ "f Skip forward k screenfuls of text [1]\n"
+ "b or ctrl-B Skip backwards k screenfuls of text [1]\n"
+ "' Go to place where previous search started\n"
+ "= Display current line number\n"
+ "/<regular expression> Search for kth occurrence of regular expression [1]\n"
+ "n Search for kth occurrence of last r.e [1]\n"
+ "!<cmd> or :!<cmd> Execute <cmd> in a subshell\n"
+ "v Start up /usr/bin/vi at current line\n"
+ "ctrl-L Redraw screen\n"
+ ":n Go to kth next file [1]\n"
+ ":p Go to kth previous file [1]\n"
+ ":f Display current file name and line number\n"
+ ". Repeat previous command\n"), stdout);
+ puts("---------------------------------------"
+ "----------------------------------------");
+ output_prompt(ctl, filename);
+ break;
+ case 'v': /* This case should go right before default */
+ if (!ctl->no_tty_in) {
+ /* Earlier: call vi +n file. This also
+ * works for emacs. POSIX: call vi -c n
+ * file (when editor is vi or ex). */
+ char *editor, *p;
+ int n = (ctl->current_line - ctl->lines_per_screen <= 0 ? 1 :
+ ctl->current_line - (ctl->lines_per_screen + 1) / 2);
+ int split = 0;
+
+ editor = getenv("VISUAL");
+ if (editor == NULL || *editor == '\0')
+ editor = getenv("EDITOR");
+ if (editor == NULL || *editor == '\0')
+ editor = VI;
+
+ p = strrchr(editor, '/');
+ if (p)
+ p++;
+ else
+ p = editor;
+ if (!strcmp(p, "vi") || !strcmp(p, "ex")) {
+ sprintf(cmdbuf, "-c %d", n);
+ split = 1;
+ } else {
+ sprintf(cmdbuf, "+%d", n);
+ }
+
+ kill_line(ctl);
+ printf("%s %s %s", editor, cmdbuf,
+ ctl->file_names[ctl->argv_position]);
+ if (split) {
+ cmdbuf[2] = 0;
+ execute(ctl, filename, editor, editor,
+ cmdbuf, cmdbuf + 3,
+ ctl->file_names[ctl->argv_position], (char *)0);
+ } else
+ execute(ctl, filename, editor, editor,
+ cmdbuf, ctl->file_names[ctl->argv_position],
+ (char *)0);
+ break;
+ }
+ /* fallthrough */
+ default:
+ if (ctl->suppress_bell) {
+ kill_line(ctl);
+ if (ctl->enter_std && ctl->exit_std) {
+ putp(ctl->enter_std);
+ ctl->prompt_len =
+ printf(_
+ ("[Press 'h' for instructions.]"))
+ + 2 * ctl->stdout_glitch;
+ putp(ctl->exit_std);
+ } else
+ ctl->prompt_len =
+ printf(_
+ ("[Press 'h' for instructions.]"));
+ fflush(stdout);
+ } else
+ fputc(RINGBELL, stderr);
+ break;
+ }
+ if (done)
+ break;
+ }
+ putchar('\r');
+ endsw:
+ ctl->waiting_input = 0;
+ ctl->no_quit_dialog = 1;
+ return retval;
+}
+
+/* Print out the contents of the file f, one screenful at a time. */
+static void screen(struct more_control *ctl, FILE *f, int num_lines)
+{
+ int c;
+ int nchars;
+ int length; /* length of current line */
+ static int prev_len = 1; /* length of previous line */
+
+ for (;;) {
+ while (num_lines > 0 && !ctl->is_paused) {
+ if ((nchars = get_line(ctl, f, &length)) == EOF) {
+ if (ctl->clear_line_ends)
+ putp(ctl->clear_rest);
+ return;
+ }
+ if (ctl->squeeze_spaces && length == 0 && prev_len == 0)
+ continue;
+ prev_len = length;
+ if (ctl->bad_stdout
+ || ((ctl->enter_std && *ctl->enter_std == ' ') && (ctl->prompt_len > 0)))
+ erase_prompt(ctl, 0);
+ /* must clear before drawing line since tabs on
+ * some terminals do not erase what they tab
+ * over. */
+ if (ctl->clear_line_ends)
+ putp(ctl->erase_line);
+ print_buf(ctl, ctl->line_buf, length);
+ if (nchars < ctl->prompt_len)
+ erase_prompt(ctl, nchars); /* erase_prompt () sets prompt_len to 0 */
+ else
+ ctl->prompt_len = 0;
+ if (nchars < ctl->num_columns || !ctl->fold_long_lines)
+ print_buf(ctl, "\n", 1); /* will turn off UL if necessary */
+ num_lines--;
+ }
+ if (ctl->underline_state) {
+ putp(ctl->exit_underline);
+ ctl->underline_state = 0;
+ }
+ fflush(stdout);
+ if ((c = more_getc(ctl, f)) == EOF) {
+ if (ctl->clear_line_ends)
+ putp(ctl->clear_rest);
+ return;
+ }
+
+ if (ctl->is_paused && ctl->clear_line_ends)
+ putp(ctl->clear_rest);
+ more_ungetc(ctl, c, f);
+ sigsetjmp(ctl->destination, 1);
+ ctl->is_paused = 0;
+ ctl->starting_up = 0;
+ if ((num_lines = more_key_command(ctl, NULL, f)) == 0)
+ return;
+ if (ctl->hard_tty && ctl->prompt_len > 0)
+ erase_prompt(ctl, 0);
+ if (ctl->no_scroll && num_lines >= ctl->lines_per_screen) {
+ if (ctl->clear_line_ends)
+ putp(ctl->go_home);
+ else
+ more_clear_screen(ctl);
+ }
+ ctl->screen_start.line_num = ctl->current_line;
+ ctl->screen_start.row_num = ctl->file_position;
+ }
+}
+
+/* Come here if a signal for a window size change is received */
+static void sigwinch_handler(int dummy __attribute__((__unused__)))
+{
+ struct winsize win;
+
+ signal(SIGWINCH, SIG_IGN);
+ if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) != -1) {
+ if (win.ws_row != 0) {
+ global_ctl->lines_per_page = win.ws_row;
+ global_ctl->d_scroll_len = global_ctl->lines_per_page / 2 - 1;
+ if (global_ctl->d_scroll_len <= 0)
+ global_ctl->d_scroll_len = 1;
+ global_ctl->lines_per_screen = global_ctl->lines_per_page - 1;
+ }
+ if (win.ws_col != 0)
+ global_ctl->num_columns = win.ws_col;
+ }
+ signal(SIGWINCH, sigwinch_handler);
+}
+
+static void copy_file(FILE *f)
+{
+ char buf[BUFSIZ];
+ size_t sz;
+
+ while ((sz = fread(&buf, sizeof(char), sizeof(buf), f)) > 0)
+ fwrite(&buf, sizeof(char), sz, stdout);
+}
+
+
+static void initterm(struct more_control *ctl)
+{
+ int ret;
+ char *term;
+ struct winsize win;
+
+#ifndef NON_INTERACTIVE_MORE
+ ctl->no_tty_out = tcgetattr(STDOUT_FILENO, &ctl->output_tty);
+#endif
+ if (!ctl->no_tty_out) {
+ ctl->erase_previous_ok = (ctl->output_tty.c_cc[VERASE] != 255);
+ ctl->erase_input_ok = (ctl->output_tty.c_cc[VKILL] != 255);
+ if ((term = getenv("TERM")) == NULL) {
+ ctl->dumb_tty = 1;
+ ctl->enable_underlining = 0;
+ }
+ setupterm(term, 1, &ret);
+ if (ret <= 0) {
+ ctl->dumb_tty = 1;
+ ctl->enable_underlining = 0;
+ } else {
+ if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) < 0) {
+ ctl->lines_per_page = tigetnum(TERM_LINES);
+ ctl->num_columns = tigetnum(TERM_COLS);
+ } else {
+ if ((ctl->lines_per_page = win.ws_row) == 0)
+ ctl->lines_per_page = tigetnum(TERM_LINES);
+ if ((ctl->num_columns = win.ws_col) == 0)
+ ctl->num_columns = tigetnum(TERM_COLS);
+ }
+ if ((ctl->lines_per_page <= 0) || tigetflag(TERM_HARD_COPY)) {
+ ctl->hard_tty = 1;
+ ctl->lines_per_page = LINES_PER_PAGE;
+ }
+
+ if (tigetflag(TERM_EAT_NEW_LINE))
+ /* Eat newline at last column + 1; dec, concept */
+ ctl->eat_newline++;
+ if (ctl->num_columns <= 0)
+ ctl->num_columns = NUM_COLUMNS;
+
+ ctl->wrap_margin = tigetflag(TERM_AUTO_RIGHT_MARGIN);
+ ctl->bad_stdout = tigetflag(TERM_CEOL);
+ ctl->erase_line = tigetstr(TERM_CLEAR_TO_LINE_END);
+ ctl->clear = tigetstr(TERM_CLEAR);
+ ctl->enter_std = tigetstr(TERM_STANDARD_MODE);
+ ctl->exit_std = tigetstr(TERM_EXIT_STANDARD_MODE);
+ if (0 < tigetnum(TERM_STD_MODE_GLITCH))
+ ctl->stdout_glitch = 1;
+
+ /* Set up for underlining: some terminals don't
+ * need it; others have start/stop sequences,
+ * still others have an underline char sequence
+ * which is assumed to move the cursor forward
+ * one character. If underline sequence isn't
+ * available, settle for standout sequence. */
+ if (tigetflag(TERM_UNDERLINE)
+ || tigetflag(TERM_OVER_STRIKE))
+ ctl->enable_underlining = 0;
+ if ((ctl->underline_ch = tigetstr(TERM_UNDERLINE_CHAR)) == NULL)
+ ctl->underline_ch = "";
+ if (((ctl->enter_underline =
+ tigetstr(TERM_ENTER_UNDERLINE)) == NULL
+ || (ctl->exit_underline =
+ tigetstr(TERM_EXIT_UNDERLINE)) == NULL)
+ && !*ctl->underline_ch) {
+ if ((ctl->enter_underline = ctl->enter_std) == NULL
+ || (ctl->exit_underline = ctl->exit_std) == NULL) {
+ ctl->enter_underline = "";
+ ctl->exit_underline = "";
+ } else
+ ctl->underline_glitch = ctl->stdout_glitch;
+ } else {
+ ctl->underline_glitch = 0;
+ }
+ ctl->go_home = tigetstr(TERM_HOME);
+ if (ctl->go_home == NULL || *ctl->go_home == '\0') {
+ if ((ctl->cursor_addr =
+ tigetstr(TERM_CURSOR_ADDRESS)) != NULL) {
+ const char *t =
+ (const char *)tparm(ctl->cursor_addr, 0,
+ 0);
+ xstrncpy(ctl->home_position, t,
+ sizeof(ctl->home_position));
+ ctl->go_home = ctl->home_position;
+ }
+ }
+ ctl->clear_rest = tigetstr(TERM_CLEAR_TO_SCREEN_END);
+ if ((ctl->backspace_ch = tigetstr(TERM_LINE_DOWN)) == NULL)
+ ctl->backspace_ch = BS;
+
+ }
+ if ((ctl->shell = getenv("SHELL")) == NULL)
+ ctl->shell = "/bin/sh";
+ }
+ ctl->no_tty_in = tcgetattr(STDIN_FILENO, &ctl->output_tty);
+ tcgetattr(STDERR_FILENO, &ctl->output_tty);
+ ctl->original_tty = ctl->output_tty;
+ ctl->hard_tabs = (ctl->output_tty.c_oflag & TABDLY) != TAB3;
+ if (!ctl->no_tty_out) {
+ ctl->output_tty.c_lflag &= ~(ICANON | ECHO);
+ ctl->output_tty.c_cc[VMIN] = 1;
+ ctl->output_tty.c_cc[VTIME] = 0;
+ }
+}
+
+int main(int argc, char **argv)
+{
+ FILE *f;
+ char *s;
+ int chr;
+ int left;
+ int print_names = 0;
+ int init = 0;
+ int search_at_start = 0;
+ int skip_file = 0;
+ int start_at_line = 0;
+ char *initbuf = NULL;
+ struct more_control ctl = {
+ .first_file = 1,
+ .fold_long_lines = 1,
+ .no_quit_dialog = 1,
+ .starting_up = 1,
+ .stop_after_formfeed = 1,
+ .enable_underlining = 1,
+ .wrap_margin = 1,
+ .lines_per_page = LINES_PER_PAGE,
+ .num_columns = NUM_COLUMNS,
+ .d_scroll_len = SCROLL_LEN,
+ 0
+ };
+ global_ctl = &ctl;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ atexit(close_stdout);
+
+ if (argc > 1) {
+ /* first arg may be one of our standard longopts */
+ if (!strcmp(argv[1], "--help"))
+ usage();
+ if (!strcmp(argv[1], "--version")) {
+ printf(UTIL_LINUX_VERSION);
+ exit(EXIT_SUCCESS);
+ }
+ }
+
+ ctl.num_files = argc;
+ ctl.file_names = argv;
+ setlocale(LC_ALL, "");
+ initterm(&ctl);
+
+ /* Auto set no scroll on when binary is called page */
+ if (!(strcmp(program_invocation_short_name, "page")))
+ ctl.no_scroll++;
+
+ prepare_line_buffer(&ctl);
+
+ ctl.d_scroll_len = ctl.lines_per_page / 2 - 1;
+ if (ctl.d_scroll_len <= 0)
+ ctl.d_scroll_len = 1;
+
+ if ((s = getenv("MORE")) != NULL)
+ arg_parser(&ctl, s);
+
+ while (--ctl.num_files > 0) {
+ if ((chr = (*++ctl.file_names)[0]) == '-') {
+ arg_parser(&ctl, *ctl.file_names + 1);
+ } else if (chr == '+') {
+ s = *ctl.file_names;
+ if (*++s == '/') {
+ search_at_start++;
+ initbuf = xstrdup(s + 1);
+ } else {
+ init++;
+ for (start_at_line = 0; *s != '\0'; s++)
+ if (isdigit(*s))
+ start_at_line =
+ start_at_line * 10 + *s - '0';
+ --start_at_line;
+ }
+ } else
+ break;
+ }
+ /* allow clear_line_ends only if go_home and erase_line and clear_rest strings are
+ * defined, and in that case, make sure we are in no_scroll mode */
+ if (ctl.clear_line_ends) {
+ if ((ctl.go_home == NULL) || (*ctl.go_home == '\0') ||
+ (ctl.erase_line == NULL) || (*ctl.erase_line == '\0') ||
+ (ctl.clear_rest == NULL) || (*ctl.clear_rest == '\0'))
+ ctl.clear_line_ends = 0;
+ else
+ ctl.no_scroll = 1;
+ }
+ if (ctl.lines_per_screen == 0)
+ ctl.lines_per_screen = ctl.lines_per_page - 1;
+ left = ctl.lines_per_screen;
+ if (ctl.num_files > 1)
+ print_names++;
+ if (!ctl.no_tty_in && ctl.num_files == 0) {
+ warnx(_("bad usage"));
+ errtryhelp(EXIT_FAILURE);
+ } else
+ f = stdin;
+ if (!ctl.no_tty_out) {
+ signal(SIGQUIT, sigquit_handler);
+ signal(SIGINT, more_exit);
+ signal(SIGWINCH, sigwinch_handler);
+ if (signal(SIGTSTP, SIG_IGN) == SIG_DFL) {
+ signal(SIGTSTP, sigtstp_handler);
+ ctl.catch_suspend++;
+ }
+ tcsetattr(STDERR_FILENO, TCSANOW, &ctl.output_tty);
+ }
+ if (ctl.no_tty_in) {
+ if (ctl.no_tty_out)
+ copy_file(stdin);
+ else {
+ if ((chr = getc(f)) == '\f')
+ more_clear_screen(&ctl);
+ else {
+ ungetc(chr, f);
+ if (ctl.no_scroll && (chr != EOF)) {
+ if (ctl.clear_line_ends)
+ putp(ctl.go_home);
+ else
+ more_clear_screen(&ctl);
+ }
+ }
+ if (search_at_start) {
+ free(ctl.previous_search);
+ ctl.previous_search = xstrdup(initbuf);
+ search(&ctl, initbuf, stdin, 1);
+ if (ctl.no_scroll)
+ left--;
+ } else if (init)
+ skip_lines(&ctl, start_at_line, stdin);
+ screen(&ctl, stdin, left);
+ }
+ ctl.no_tty_in = 0;
+ print_names++;
+ ctl.first_file = 0;
+ }
+
+ while (ctl.argv_position < ctl.num_files) {
+ if ((f = checkf(&ctl, ctl.file_names[ctl.argv_position], &skip_file)) != NULL) {
+ ctl.context.line_num = ctl.context.row_num = 0;
+ ctl.current_line = 0;
+ if (ctl.first_file)
+ sigsetjmp(ctl.destination, 1);
+ if (ctl.first_file) {
+ ctl.first_file = 0;
+ if (search_at_start) {
+ free(ctl.previous_search);
+ ctl.previous_search = xstrdup(initbuf);
+ search(&ctl, initbuf, f, 1);
+ if (ctl.no_scroll)
+ left--;
+ } else if (init)
+ skip_lines(&ctl, start_at_line, f);
+ } else if (ctl.argv_position < ctl.num_files && !ctl.no_tty_out) {
+ sigsetjmp(ctl.destination, 1);
+ left = more_key_command(&ctl, ctl.file_names[ctl.argv_position], f);
+ }
+ if (left != 0) {
+ if ((ctl.no_scroll || skip_file)
+ && (ctl.file_size != LONG_MAX)) {
+ if (ctl.clear_line_ends)
+ putp(ctl.go_home);
+ else
+ more_clear_screen(&ctl);
+ }
+ if (print_names) {
+ if (ctl.bad_stdout)
+ erase_prompt(&ctl, 0);
+ if (ctl.clear_line_ends)
+ putp(ctl.erase_line);
+ fputs("::::::::::::::", stdout);
+ if (ctl.prompt_len > 14)
+ erase_prompt(&ctl, 14);
+ putchar('\n');
+ if (ctl.clear_line_ends)
+ putp(ctl.erase_line);
+ puts(ctl.file_names[ctl.argv_position]);
+ if (ctl.clear_line_ends)
+ putp(ctl.erase_line);
+ fputs("::::::::::::::\n", stdout);
+ if (left > ctl.lines_per_page - 4)
+ left = ctl.lines_per_page - 4;
+ }
+ if (ctl.no_tty_out)
+ copy_file(f);
+ else {
+ ctl.within_file = 1;
+ screen(&ctl, f, left);
+ ctl.within_file = 0;
+ }
+ }
+ sigsetjmp(ctl.destination, 1);
+ fflush(stdout);
+ fclose(f);
+ ctl.screen_start.line_num = ctl.screen_start.row_num = 0L;
+ ctl.context.line_num = ctl.context.row_num = 0L;
+ }
+ ctl.argv_position++;
+ ctl.first_file = 0;
+ }
+ free(ctl.previous_search);
+ free(initbuf);
+ free(ctl.line_buf);
+ reset_tty();
+ exit(EXIT_SUCCESS);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 12:54:06 +0000