Adding upstream version 2.39.3.upstream/2.39.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1690 insertions, 0 deletions

diff --git a/text-utils/pg.c b/text-utils/pg.c
new file mode 100644
index 0000000..adb3840
--- /dev/null
+++ b/text-utils/pg.c
@@ -0,0 +1,1690 @@
+/*
+ * pg  - A clone of the System V CRT paging utility.
+ *
+ *	Copyright (c) 2000-2001 Gunnar Ritter. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. [deleted]
+ * 4. Neither the name of Gunnar Ritter nor the names of his contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY GUNNAR RITTER AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL GUNNAR RITTER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* Sccsid @(#)pg.c 1.44 (gritter) 2/8/02 - modified for util-linux */
+
+/*
+ * This command is deprecated.  The utility is in maintenance mode,
+ * meaning we keep them in source tree for backward compatibility
+ * only.  Do not waste time making this command better, unless the
+ * fix is about security or other very critical issue.
+ *
+ * See Documentation/deprecated.txt for more information.
+ */
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#ifndef	TIOCGWINSZ
+# include <sys/ioctl.h>
+#endif
+#include <termios.h>
+#include <fcntl.h>
+#include <regex.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <ctype.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+#include <setjmp.h>
+
+#if defined(HAVE_NCURSESW_NCURSES_H)
+# include <ncursesw/ncurses.h>
+#elif defined(HAVE_NCURSES_NCURSES_H)
+# include <ncurses/ncurses.h>
+#elif defined(HAVE_NCURSES_H)
+# include <ncurses.h>
+#endif
+
+#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 "nls.h"
+#include "xalloc.h"
+#include "widechar.h"
+#include "all-io.h"
+#include "closestream.h"
+#include "strutils.h"
+
+#define	READBUF		LINE_MAX	/* size of input buffer */
+#define CMDBUF		255		/* size of command buffer */
+#define	PG_TABSIZE	8		/* spaces consumed by tab character */
+
+#define	cuc(c)		((c) & 0377)
+
+enum { FORWARD = 1, BACKWARD = 2 };	/* search direction */
+enum { TOP, MIDDLE, BOTTOM };		/* position of matching line */
+
+/* States for syntax-aware command line editor. */
+enum {
+	COUNT,
+	SIGN,
+	CMD_FIN,
+	SEARCH,
+	SEARCH_FIN,
+	ADDON_FIN,
+	STRING,
+	INVALID
+};
+
+/* Current command */
+static struct {
+	char cmdline[CMDBUF];
+	size_t cmdlen;
+	int count;
+	int key;
+	char pattern[CMDBUF];
+	char addon;
+} cmd;
+
+/* Position of file arguments on argv[] to main() */
+static struct {
+	int first;
+	int current;
+	int last;
+} files;
+
+static void (*oldint) (int);		/* old SIGINT handler */
+static void (*oldquit) (int);		/* old SIGQUIT handler */
+static void (*oldterm) (int);		/* old SIGTERM handler */
+static char *tty;			/* result of ttyname(1) */
+static unsigned ontty;			/* whether running on tty device */
+static unsigned exitstatus;		/* exit status */
+static int pagelen = 23;		/* lines on a single screen page */
+static int ttycols = 79;		/* screen columns (starting at 0) */
+static struct termios otio;		/* old termios settings */
+static int tinfostat = -1;		/* terminfo routines initialized */
+static int searchdisplay = TOP;	/* matching line position */
+static regex_t re;			/* regular expression to search for */
+static int remembered;			/* have a remembered search string */
+static int cflag;			/* clear screen before each page */
+static int eflag;			/* suppress (EOF) */
+static int fflag;			/* do not split lines */
+static int nflag;			/* no newline for commands required */
+static int rflag;			/* "restricted" pg */
+static int sflag;			/* use standout mode */
+static const char *pstring = ":";	/* prompt string */
+static char *searchfor;		/* search pattern from argv[] */
+static int havepagelen;		/* page length is manually defined */
+static long startline;			/* start line from argv[] */
+static int nextfile = 1;		/* files to advance */
+static jmp_buf jmpenv;			/* jump from signal handlers */
+static int canjump;			/* jmpenv is valid */
+static wchar_t wbuf[READBUF];		/* used in several widechar routines */
+
+static char *copyright;
+static const char *helpscreen = N_("\
+-------------------------------------------------------\n\
+  h                       this screen\n\
+  q or Q                  quit program\n\
+  <newline>               next page\n\
+  f                       skip a page forward\n\
+  d or ^D                 next halfpage\n\
+  l                       next line\n\
+  $                       last page\n\
+  /regex/                 search forward for regex\n\
+  ?regex? or ^regex^      search backward for regex\n\
+  . or ^L                 redraw screen\n\
+  w or z                  set page size and go to next page\n\
+  s filename              save current file to filename\n\
+  !command                shell escape\n\
+  p                       go to previous file\n\
+  n                       go to next file\n\
+\n\
+Many commands accept preceding numbers, for example:\n\
++1<newline> (next page); -1<newline> (previous page); 1<newline> (first page).\n\
+\n\
+See pg(1) for more information.\n\
+-------------------------------------------------------\n");
+
+#ifndef HAVE_FSEEKO
+static int fseeko(FILE *f, off_t off, int whence)
+{
+	return fseek(f, (long)off, whence);
+}
+
+static off_t ftello(FILE *f)
+{
+	return (off_t) ftell(f);
+}
+#endif
+
+#ifdef USE_SIGSET	/* never defined */
+/* sigset and sigrelse are obsolete - use when POSIX stuff is unavailable */
+# define my_sigset	sigset
+# define my_sigrelse	sigrelse
+#else
+static int my_sigrelse(int sig)
+{
+	sigset_t sigs;
+
+	if (sigemptyset(&sigs) || sigaddset(&sigs, sig))
+		return -1;
+	return sigprocmask(SIG_UNBLOCK, &sigs, NULL);
+}
+
+typedef void (*my_sighandler_t) (int);
+static my_sighandler_t my_sigset(int sig, my_sighandler_t disp)
+{
+	struct sigaction act, oact;
+
+	act.sa_handler = disp;
+	if (sigemptyset(&act.sa_mask))
+		return SIG_ERR;
+	act.sa_flags = 0;
+	if (sigaction(sig, &act, &oact))
+		return SIG_ERR;
+	if (my_sigrelse(sig))
+		return SIG_ERR;
+	return oact.sa_handler;
+}
+#endif	/* USE_SIGSET */
+
+/* Quit pg. */
+static void __attribute__((__noreturn__)) quit(int status)
+{
+	_exit(status < 0100 ? status : 077);
+}
+
+/* Usage message and similar routines. */
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	fprintf(out,
+		_(" %s [options] [+line] [+/pattern/] [files]\n"),
+		program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Browse pagewise through text files.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -number      lines per page\n"), out);
+	fputs(_(" -c           clear screen before displaying\n"), out);
+	fputs(_(" -e           do not pause at end of a file\n"), out);
+	fputs(_(" -f           do not split long lines\n"), out);
+	fputs(_(" -n           terminate command with new line\n"), out);
+	fputs(_(" -p <prompt>  specify prompt\n"), out);
+	fputs(_(" -r           disallow shell escape\n"), out);
+	fputs(_(" -s           print messages to stdout\n"), out);
+	fputs(_(" +number      start at the given line\n"), out);
+	fputs(_(" +/pattern/   start at the line containing pattern\n"), out);
+
+	fputs(USAGE_SEPARATOR, out);
+	printf(USAGE_HELP_OPTIONS(16));
+
+	printf(USAGE_MAN_TAIL("pg(1)"));
+	exit(0);
+}
+
+static void __attribute__((__noreturn__)) needarg(const char *s)
+{
+	warnx(_("option requires an argument -- %s"), s);
+	errtryhelp(2);
+}
+
+static void __attribute__((__noreturn__)) invopt(const char *s)
+{
+	warnx(_("illegal option -- %s"), s);
+	errtryhelp(2);
+}
+
+#ifdef HAVE_WIDECHAR
+/* A mbstowcs()-alike function that transparently handles invalid
+ * sequences. */
+static size_t xmbstowcs(wchar_t * pwcs, const char *s, size_t nwcs)
+{
+	size_t n = nwcs;
+	int c;
+
+	ignore_result(mbtowc(pwcs, NULL, MB_CUR_MAX));	/* reset shift state */
+	while (*s && n) {
+		if ((c = mbtowc(pwcs, s, MB_CUR_MAX)) < 0) {
+			s++;
+			*pwcs = L'?';
+		} else
+			s += c;
+		pwcs++;
+		n--;
+	}
+	if (n)
+		*pwcs = L'\0';
+	ignore_result(mbtowc(pwcs, NULL, MB_CUR_MAX));
+	return nwcs - n;
+}
+#endif
+
+/* Helper function for tputs(). */
+static int outcap(int i)
+{
+	char c = i;
+	return write_all(STDOUT_FILENO, &c, 1) == 0 ? 1 : -1;
+}
+
+/* Write messages to terminal. */
+static void mesg(const char *message)
+{
+	if (ontty == 0)
+		return;
+	if (*message != '\n' && sflag)
+		vidputs(A_STANDOUT, outcap);
+	write_all(STDOUT_FILENO, message, strlen(message));
+	if (*message != '\n' && sflag)
+		vidputs(A_NORMAL, outcap);
+}
+
+/* Get the window size. */
+static void getwinsize(void)
+{
+	static int initialized, envlines, envcols, deflines, defcols;
+#ifdef	TIOCGWINSZ
+	struct winsize winsz;
+	int badioctl;
+#endif
+	if (initialized == 0) {
+		uint32_t tmp = 0;
+
+		if (ul_strtou32(getenv("LINES"), &tmp, 10) == 0)
+			envlines = tmp;
+		if (ul_strtou32(getenv("COLUMNS"), &tmp, 10) == 0)
+			envcols = tmp;
+
+		/* terminfo values. */
+		if (tinfostat != 1 || columns == 0)
+			defcols = 24;
+		else
+			defcols = columns;
+		if (tinfostat != 1 || lines == 0)
+			deflines = 80;
+		else
+			deflines = lines;
+		initialized = 1;
+	}
+#ifdef	TIOCGWINSZ
+	badioctl = ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsz);
+#endif
+	if (envcols)
+		ttycols = envcols - 1;
+#ifdef	TIOCGWINSZ
+	else if (!badioctl)
+		ttycols = winsz.ws_col - 1;
+#endif
+	else
+		ttycols = defcols - 1;
+	if (havepagelen == 0) {
+		if (envlines)
+			pagelen = envlines - 1;
+#ifdef	TIOCGWINSZ
+		else if (!badioctl)
+			pagelen = winsz.ws_row - 1;
+#endif
+		else
+			pagelen = deflines - 1;
+	}
+}
+
+/* Message if skipping parts of files. */
+static void skip(int direction)
+{
+	if (direction > 0)
+		mesg(_("...skipping forward\n"));
+	else
+		mesg(_("...skipping backward\n"));
+}
+
+/* Signal handler while reading from input file. */
+static void sighandler(int signum)
+{
+	if (canjump && (signum == SIGINT || signum == SIGQUIT))
+		longjmp(jmpenv, signum);
+	tcsetattr(STDOUT_FILENO, TCSADRAIN, &otio);
+	quit(exitstatus);
+}
+
+/* Check whether the requested file was specified on the command line. */
+static int checkf(void)
+{
+	if (files.current + nextfile >= files.last) {
+		mesg(_("No next file"));
+		return 1;
+	}
+	if (files.current + nextfile < files.first) {
+		mesg(_("No previous file"));
+		return 1;
+	}
+	return 0;
+}
+
+#ifdef HAVE_WIDECHAR
+/* Return the last character that will fit on the line at col columns in
+ * case MB_CUR_MAX > 1. */
+static char *endline_for_mb(unsigned col, char *s)
+{
+	size_t pos = 0;
+	wchar_t *p = wbuf;
+	wchar_t *end;
+	size_t wl;
+	char *t = s;
+
+	if ((wl = xmbstowcs(wbuf, t, sizeof wbuf - 1)) == (size_t)-1)
+		return s + 1;
+	wbuf[wl] = L'\0';
+	while (*p != L'\0') {
+		switch (*p) {
+			/* Cursor left. */
+		case L'\b':
+			if (pos > 0)
+				pos--;
+			break;
+			/* No cursor movement. */
+		case L'\a':
+			break;
+			/* Special. */
+		case L'\r':
+			pos = 0;
+			break;
+		case L'\n':
+			end = p + 1;
+			goto ended;
+			/* Cursor right. */
+		case L'\t':
+			pos += PG_TABSIZE - (pos % PG_TABSIZE);
+			break;
+		default:
+			if (iswprint(*p))
+				pos += wcwidth(*p);
+			else
+				pos += wcwidth(L'?');
+		}
+		if (pos > col) {
+			if (*p == L'\t')
+				p++;
+			else if (pos > col + 1)
+				/* wcwidth() found a character that has
+				 * multiple columns.  What happens now?
+				 * Assume the terminal will print the
+				 * entire character onto the next row. */
+				p--;
+			if (*++p == L'\n')
+				p++;
+			end = p;
+			goto ended;
+		}
+		p++;
+	}
+	end = p;
+ ended:
+	*end = L'\0';
+	p = wbuf;
+	if ((pos = wcstombs(NULL, p, 0)) == (size_t)-1)
+		return s + 1;
+	return s + pos;
+}
+#endif	/* HAVE_WIDECHAR */
+
+/* Return the last character that will fit on the line at col columns. */
+static char *endline(unsigned col, char *s)
+{
+	unsigned pos = 0;
+	char *t = s;
+
+#ifdef HAVE_WIDECHAR
+	if (MB_CUR_MAX > 1)
+		return endline_for_mb(col, s);
+#endif
+
+	while (*s != '\0') {
+		switch (*s) {
+			/* Cursor left. */
+		case '\b':
+			if (pos > 0)
+				pos--;
+			break;
+			/* No cursor movement. */
+		case '\a':
+			break;
+			/* Special. */
+		case '\r':
+			pos = 0;
+			break;
+		case '\n':
+			t = s + 1;
+			goto cend;
+			/* Cursor right. */
+		case '\t':
+			pos += PG_TABSIZE - (pos % PG_TABSIZE);
+			break;
+		default:
+			pos++;
+		}
+		if (pos > col) {
+			if (*s == '\t')
+				s++;
+			if (*++s == '\n')
+				s++;
+			t = s;
+			goto cend;
+		}
+		s++;
+	}
+	t = s;
+ cend:
+	return t;
+}
+
+/* Clear the current line on the terminal's screen. */
+static void cline(void)
+{
+	char *buf = xmalloc(ttycols + 2);
+	memset(buf, ' ', ttycols + 2);
+	buf[0] = '\r';
+	buf[ttycols + 1] = '\r';
+	write_all(STDOUT_FILENO, buf, ttycols + 2);
+	free(buf);
+}
+
+/* Evaluate a command character's semantics. */
+static int getstate(int c)
+{
+	switch (c) {
+	case '1':
+	case '2':
+	case '3':
+	case '4':
+	case '5':
+	case '6':
+	case '7':
+	case '8':
+	case '9':
+	case '0':
+	case '\0':
+		return COUNT;
+	case '-':
+	case '+':
+		return SIGN;
+	case 'l':
+	case 'd':
+	case '\004':
+	case 'f':
+	case 'z':
+	case '.':
+	case '\014':
+	case '$':
+	case 'n':
+	case 'p':
+	case 'w':
+	case 'h':
+	case 'q':
+	case 'Q':
+		return CMD_FIN;
+	case '/':
+	case '?':
+	case '^':
+		return SEARCH;
+	case 's':
+	case '!':
+		return STRING;
+	case 'm':
+	case 'b':
+	case 't':
+		return ADDON_FIN;
+	default:
+#ifdef PG_BELL
+		if (bell)
+			tputs(bell, STDOUT_FILENO, outcap);
+#endif
+		return INVALID;
+	}
+}
+
+/* Get the count and ignore last character of string. */
+static int getcount(char *cmdstr)
+{
+	char *buf;
+	char *p;
+	int i;
+
+	if (*cmdstr == '\0')
+		return 1;
+	buf = xmalloc(strlen(cmdstr) + 1);
+	strcpy(buf, cmdstr);
+	if (cmd.key != '\0') {
+		if (cmd.key == '/' || cmd.key == '?' || cmd.key == '^') {
+			if ((p = strchr(buf, cmd.key)) != NULL)
+				*p = '\0';
+		} else
+			*(buf + strlen(buf) - 1) = '\0';
+	}
+	if (*buf == '\0') {
+		free(buf);
+		return 1;
+	}
+	if (buf[0] == '-' && buf[1] == '\0') {
+		i = -1;
+	} else if (ul_strtos32(*buf == '+' ? buf + 1 : buf, &i, 10) != 0) {
+		i = -1;
+	}
+	free(buf);
+	return i;
+}
+
+/* Read what the user writes at the prompt. This is tricky because we
+ * check for valid input. */
+static void prompt(long long pageno)
+{
+	struct termios tio;
+	char key;
+	int state = COUNT;
+	int escape = 0;
+	char b[LINE_MAX], *p;
+
+	if (pageno != -1) {
+		if ((p = strstr(pstring, "%d")) == NULL) {
+			mesg(pstring);
+		} else {
+			strcpy(b, pstring);
+			sprintf(b + (p - pstring), "%lld", pageno);
+			strcat(b, p + 2);
+			mesg(b);
+		}
+	}
+	cmd.key = cmd.addon = cmd.cmdline[0] = '\0';
+	cmd.cmdlen = 0;
+	tcgetattr(STDOUT_FILENO, &tio);
+	tio.c_lflag &= ~(ICANON | ECHO);
+	tio.c_cc[VMIN] = 1;
+	tio.c_cc[VTIME] = 0;
+	tcsetattr(STDOUT_FILENO, TCSADRAIN, &tio);
+	tcflush(STDOUT_FILENO, TCIFLUSH);
+	for (;;) {
+		switch (read(STDOUT_FILENO, &key, 1)) {
+		case 0:
+			quit(0);
+			/* NOTREACHED */
+		case -1:
+			quit(1);
+		}
+		if (key == tio.c_cc[VERASE]) {
+			if (cmd.cmdlen) {
+				write_all(STDOUT_FILENO, "\b \b", 3);
+				cmd.cmdline[--cmd.cmdlen] = '\0';
+				switch (state) {
+				case ADDON_FIN:
+					state = SEARCH_FIN;
+					cmd.addon = '\0';
+					break;
+				case CMD_FIN:
+					cmd.key = '\0';
+					state = COUNT;
+					break;
+				case SEARCH_FIN:
+					state = SEARCH;
+					/* fallthrough */
+				case SEARCH:
+					if (cmd.cmdline[cmd.cmdlen - 1] == '\\') {
+						escape = 1;
+						while (cmd.cmdline[cmd.cmdlen
+								   - escape - 1]
+						       == '\\')
+							escape++;
+						escape %= 2;
+					} else {
+						escape = 0;
+						if (strchr(cmd.cmdline, cmd.key)
+						    == NULL) {
+							cmd.key = '\0';
+							state = COUNT;
+						}
+					}
+					break;
+				}
+			}
+			if (cmd.cmdlen == 0) {
+				state = COUNT;
+				cmd.key = '\0';
+			}
+			continue;
+		}
+		if (key == tio.c_cc[VKILL]) {
+			cline();
+			cmd.cmdlen = 0;
+			cmd.cmdline[0] = '\0';
+			state = COUNT;
+			cmd.key = '\0';
+			continue;
+		}
+		if (key == '\n' || (nflag && state == COUNT && key == ' '))
+			break;
+		if (cmd.cmdlen >= CMDBUF - 1)
+			continue;
+		switch (state) {
+		case STRING:
+			break;
+		case SEARCH:
+			if (!escape) {
+				if (key == cmd.key)
+					state = SEARCH_FIN;
+				if (key == '\\')
+					escape = 1;
+			} else
+				escape = 0;
+			break;
+		case SEARCH_FIN:
+			if (getstate(key) != ADDON_FIN)
+				continue;
+			state = ADDON_FIN;
+			cmd.addon = key;
+			switch (key) {
+			case 't':
+				searchdisplay = TOP;
+				break;
+			case 'm':
+				searchdisplay = MIDDLE;
+				break;
+			case 'b':
+				searchdisplay = BOTTOM;
+				break;
+			}
+			break;
+		case CMD_FIN:
+		case ADDON_FIN:
+			continue;
+		default:
+			state = getstate(key);
+			switch (state) {
+			case SIGN:
+				if (cmd.cmdlen != 0) {
+					state = INVALID;
+					continue;
+				}
+				state = COUNT;
+				/* fallthrough */
+			case COUNT:
+				break;
+			case ADDON_FIN:
+			case INVALID:
+				continue;
+			default:
+				cmd.key = key;
+			}
+		}
+		write_all(STDOUT_FILENO, &key, 1);
+		cmd.cmdline[cmd.cmdlen++] = key;
+		cmd.cmdline[cmd.cmdlen] = '\0';
+		if (nflag && state == CMD_FIN)
+			goto endprompt;
+	}
+ endprompt:
+	tcsetattr(STDOUT_FILENO, TCSADRAIN, &otio);
+	cline();
+	cmd.count = getcount(cmd.cmdline);
+}
+
+#ifdef HAVE_WIDECHAR
+/* Remove backspace formatting, for searches in case MB_CUR_MAX > 1. */
+static char *colb_for_mb(char *s)
+{
+	char *p = s;
+	wchar_t *wp, *wq;
+	size_t l = strlen(s), wl;
+	unsigned i;
+
+	if ((wl = xmbstowcs(wbuf, p, sizeof wbuf)) == (size_t)-1)
+		return s;
+	for (wp = wbuf, wq = wbuf, i = 0; *wp != L'\0' && i < wl; wp++, wq++) {
+		if (*wp == L'\b') {
+			if (wq != wbuf)
+				wq -= 2;
+			else
+				wq--;
+		} else
+			*wq = *wp;
+	}
+	*wq = L'\0';
+	wp = wbuf;
+	wcstombs(s, wp, l + 1);
+
+	return s;
+}
+#endif
+
+/* Remove backspace formatting, for searches. */
+static char *colb(char *s)
+{
+	char *p = s, *q;
+
+#ifdef HAVE_WIDECHAR
+	if (MB_CUR_MAX > 1)
+		return colb_for_mb(s);
+#endif
+
+	for (q = s; *p != '\0'; p++, q++) {
+		if (*p == '\b') {
+			if (q != s)
+				q -= 2;
+			else
+				q--;
+		} else
+			*q = *p;
+	}
+	*q = '\0';
+
+	return s;
+}
+
+#ifdef HAVE_WIDECHAR
+/* Convert non-printable characters to spaces in case MB_CUR_MAX > 1.  */
+static void makeprint_for_mb(char *s, size_t l)
+{
+	char *t = s;
+	wchar_t *wp = wbuf;
+	size_t wl;
+
+	if ((wl = xmbstowcs(wbuf, t, sizeof wbuf)) == (size_t)-1)
+		return;
+	while (wl--) {
+		if (!iswprint(*wp) && *wp != L'\n' && *wp != L'\r'
+		    && *wp != L'\b' && *wp != L'\t')
+			*wp = L'?';
+		wp++;
+	}
+	wp = wbuf;
+	wcstombs(s, wp, l);
+}
+#endif
+
+/* Convert non-printable characters to spaces. */
+static void makeprint(char *s, size_t l)
+{
+#ifdef HAVE_WIDECHAR
+	if (MB_CUR_MAX > 1) {
+		makeprint_for_mb(s, l);
+		return;
+	}
+#endif
+
+	while (l--) {
+		if (!isprint(cuc(*s)) && *s != '\n' && *s != '\r'
+		    && *s != '\b' && *s != '\t')
+			*s = '?';
+		s++;
+	}
+}
+
+/* Strip backslash characters from the given string. */
+static void striprs(char *s)
+{
+	char *p = s;
+
+	do {
+		if (*s == '\\') {
+			s++;
+		}
+		*p++ = *s;
+	} while (*s++ != '\0');
+}
+
+/* Extract the search pattern off the command line. */
+static char *makepat(void)
+{
+	char *p;
+
+	if (cmd.addon == '\0')
+		p = cmd.cmdline + strlen(cmd.cmdline) - 1;
+	else
+		p = cmd.cmdline + strlen(cmd.cmdline) - 2;
+	if (*p == cmd.key)
+		*p = '\0';
+	else
+		*(p + 1) = '\0';
+	if ((p = strchr(cmd.cmdline, cmd.key)) != NULL) {
+		p++;
+		striprs(p);
+	}
+	return p;
+}
+
+/* Process errors that occurred in temporary file operations. */
+static void __attribute__((__noreturn__)) tmperr(FILE *f, const char *ftype)
+{
+	if (ferror(f))
+		warn(_("Read error from %s file"), ftype);
+	else if (feof(f))
+		/* Most likely '\0' in input. */
+		warnx(_("Unexpected EOF in %s file"), ftype);
+	else
+		warn(_("Unknown error in %s file"), ftype);
+	quit(++exitstatus);
+}
+
+/* Read the file and respond to user input.  Beware: long and ugly. */
+static void pgfile(FILE *f, const char *name)
+{
+	off_t pos, oldpos, fpos;
+	/* These are the line counters:
+	 *   line	the line desired to display
+	 *   fline	the current line of the input file
+	 *   bline	the current line of the file buffer
+	 *   oldline	the line before a search was started
+	 *   eofline	the last line of the file if it is already reached
+	 *   dline	the line on the display */
+	off_t line = 0, fline = 0, bline = 0, oldline = 0, eofline = 0;
+	int dline = 0;
+	int search = 0;
+	unsigned searchcount = 0;
+	/* Advance to EOF immediately. */
+	int seekeof = 0;
+	/* EOF has been reached by `line'. */
+	int eof = 0;
+	/* f and fbuf refer to the same file. */
+	int nobuf = 0;
+	int sig;
+	int rerror;
+	size_t sz;
+	char b[READBUF + 1];
+	char *p;
+	/*   fbuf	an exact copy of the input file as it gets read
+	 *   find	index table for input, one entry per line
+	 *   save	for the s command, to save to a file */
+	FILE *fbuf, *find, *save;
+
+	if (ontty == 0) {
+		/* Just copy stdin to stdout. */
+		while ((sz = fread(b, sizeof *b, READBUF, f)) != 0)
+			write_all(STDOUT_FILENO, b, sz);
+		if (ferror(f)) {
+			warn("%s", name);
+			exitstatus++;
+		}
+		return;
+	}
+	if ((fpos = fseeko(f, (off_t)0, SEEK_SET)) == -1)
+		fbuf = tmpfile();
+	else {
+		fbuf = f;
+		nobuf = 1;
+	}
+	find = tmpfile();
+	if (fbuf == NULL || find == NULL) {
+		warn(_("Cannot create temporary file"));
+		quit(++exitstatus);
+	}
+	if (searchfor) {
+		search = FORWARD;
+		oldline = 0;
+		searchcount = 1;
+		rerror = regcomp(&re, searchfor, REG_NOSUB | REG_NEWLINE);
+		if (rerror != 0) {
+			mesg(_("RE error: "));
+			regerror(rerror, &re, b, READBUF);
+			mesg(b);
+			goto newcmd;
+		}
+		remembered = 1;
+	}
+
+	for (line = startline;;) {
+		/* Get a line from input file or buffer. */
+		if (line < bline) {
+			fseeko(find, line * sizeof pos, SEEK_SET);
+			if (fread(&pos, sizeof pos, 1, find) == 0)
+				tmperr(find, "index");
+			fseeko(find, (off_t)0, SEEK_END);
+			fseeko(fbuf, pos, SEEK_SET);
+			if (fgets(b, READBUF, fbuf) == NULL)
+				tmperr(fbuf, "buffer");
+		} else if (eofline == 0) {
+			fseeko(find, (off_t)0, SEEK_END);
+			do {
+				if (!nobuf)
+					fseeko(fbuf, (off_t)0, SEEK_END);
+				pos = ftello(fbuf);
+				if ((sig = setjmp(jmpenv)) != 0) {
+					/* We got a signal. */
+					canjump = 0;
+					my_sigrelse(sig);
+					fseeko(fbuf, pos, SEEK_SET);
+					*b = '\0';
+					dline = pagelen;
+					break;
+				}
+
+				if (nobuf)
+					fseeko(f, fpos, SEEK_SET);
+				canjump = 1;
+				p = fgets(b, READBUF, f);
+				if (nobuf)
+					if ((fpos = ftello(f)) == -1)
+						warn("%s", name);
+				canjump = 0;
+
+				if (p == NULL || *b == '\0') {
+					if (ferror(f))
+						warn("%s", name);
+					eofline = fline;
+					eof = 1;
+					break;
+				}
+
+				if (!nobuf)
+					fputs(b, fbuf);
+				fwrite_all(&pos, sizeof pos, 1, find);
+				if (!fflag) {
+					oldpos = pos;
+					p = b;
+					while (*(p = endline(ttycols,
+							     p))
+					       != '\0') {
+						pos = oldpos + (p - b);
+						fwrite_all(&pos,
+							   sizeof pos,
+							   1, find);
+						fline++;
+						bline++;
+					}
+				}
+				fline++;
+			} while (line > bline++);
+		} else {
+			/* eofline != 0 */
+			eof = 1;
+		}
+		if (search == FORWARD && remembered == 1) {
+			if (eof) {
+				line = oldline;
+				search = searchcount = 0;
+				mesg(_("Pattern not found"));
+				eof = 0;
+				goto newcmd;
+			}
+			line++;
+			colb(b);
+			if (regexec(&re, b, 0, NULL, 0) == 0) {
+				searchcount--;
+			}
+			if (searchcount == 0) {
+				search = dline = 0;
+				switch (searchdisplay) {
+				case TOP:
+					line -= 1;
+					break;
+				case MIDDLE:
+					line -= pagelen / 2 + 1;
+					break;
+				case BOTTOM:
+					line -= pagelen;
+					break;
+				}
+				skip(1);
+			}
+			continue;
+		}
+
+		if (eof) {
+			/* We are not searching. */
+			line = bline;
+		} else if (*b != '\0') {
+			if (cflag && clear_screen) {
+				switch (dline) {
+				case 0:
+					tputs(clear_screen, STDOUT_FILENO,
+					      outcap);
+					dline = 0;
+				}
+			}
+			line++;
+			if (eofline && line == eofline)
+				eof = 1;
+			dline++;
+			if ((sig = setjmp(jmpenv)) != 0) {
+				/* We got a signal. */
+				canjump = 0;
+				my_sigrelse(sig);
+				dline = pagelen;
+			} else {
+				p = endline(ttycols, b);
+				sz = p - b;
+				makeprint(b, sz);
+				canjump = 1;
+				write_all(STDOUT_FILENO, b, sz);
+				canjump = 0;
+			}
+		}
+		if (dline >= pagelen || eof) {
+			/* Time for prompting! */
+			if (eof && seekeof) {
+				eof = seekeof = 0;
+				if (line >= pagelen)
+					line -= pagelen;
+				else
+					line = 0;
+				dline = -1;
+				continue;
+			}
+ newcmd:
+			if (eof) {
+				if (fline == 0 || eflag)
+					break;
+				mesg(_("(EOF)"));
+			}
+			prompt((line - 1) / pagelen + 1);
+			switch (cmd.key) {
+			case '/':
+				/* Search forward. */
+				search = FORWARD;
+				oldline = line;
+				searchcount = cmd.count;
+				p = makepat();
+				if (p != NULL && *p) {
+					if (remembered == 1)
+						regfree(&re);
+					rerror = regcomp(&re, p,
+							 REG_NOSUB |
+							 REG_NEWLINE);
+					if (rerror != 0) {
+						mesg(_("RE error: "));
+						sz = regerror(rerror, &re,
+							      b, READBUF);
+						mesg(b);
+						goto newcmd;
+					}
+					remembered = 1;
+				} else if (remembered == 0) {
+					mesg(_("No remembered search string"));
+					goto newcmd;
+				}
+				continue;
+			case '?':
+			case '^':
+				/* Search backward. */
+				search = BACKWARD;
+				oldline = line;
+				searchcount = cmd.count;
+				p = makepat();
+				if (p != NULL && *p) {
+					if (remembered == 1)
+						regfree(&re);
+					rerror = regcomp(&re, p,
+							 REG_NOSUB |
+							 REG_NEWLINE);
+					if (rerror != 0) {
+						mesg(_("RE error: "));
+						regerror(rerror, &re,
+							 b, READBUF);
+						mesg(b);
+						goto newcmd;
+					}
+					remembered = 1;
+				} else if (remembered == 0) {
+					mesg(_("No remembered search string"));
+					goto newcmd;
+				}
+				line -= pagelen;
+				if (line <= 0)
+					goto notfound_bw;
+				while (line) {
+					fseeko(find, --line * sizeof pos,
+					       SEEK_SET);
+					if (fread(&pos, sizeof pos, 1, find) ==
+					    0)
+						tmperr(find, "index");
+					fseeko(find, (off_t)0, SEEK_END);
+					fseeko(fbuf, pos, SEEK_SET);
+					if (fgets(b, READBUF, fbuf) == NULL)
+						tmperr(fbuf, "buffer");
+					colb(b);
+					if (regexec(&re, b, 0, NULL, 0) == 0)
+						searchcount--;
+					if (searchcount == 0)
+						goto found_bw;
+				}
+ notfound_bw:
+				line = oldline;
+				search = searchcount = 0;
+				mesg(_("Pattern not found"));
+				goto newcmd;
+ found_bw:
+				eof = search = dline = 0;
+				skip(-1);
+				switch (searchdisplay) {
+				case TOP:
+					/* line -= 1; */
+					break;
+				case MIDDLE:
+					line -= pagelen / 2;
+					break;
+				case BOTTOM:
+					if (line != 0)
+						dline = -1;
+					line -= pagelen;
+					break;
+				}
+				if (line < 0)
+					line = 0;
+				continue;
+			case 's':
+				/* Save to file. */
+				p = cmd.cmdline;
+				while (*++p == ' ') ;
+				if (*p == '\0')
+					goto newcmd;
+				save = fopen(p, "wb");
+				if (save == NULL) {
+					cmd.count = errno;
+					mesg(_("cannot open "));
+					mesg(p);
+					mesg(": ");
+					mesg(strerror(cmd.count));
+					goto newcmd;
+				}
+				/* Advance to EOF. */
+				fseeko(find, (off_t)0, SEEK_END);
+				for (;;) {
+					if (!nobuf)
+						fseeko(fbuf, (off_t)0,
+						       SEEK_END);
+					pos = ftello(fbuf);
+					if (fgets(b, READBUF, f) == NULL) {
+						eofline = fline;
+						break;
+					}
+					if (!nobuf)
+						fputs(b, fbuf);
+					fwrite_all(&pos, sizeof pos, 1, find);
+					if (!fflag) {
+						oldpos = pos;
+						p = b;
+						while (*(p = endline(ttycols,
+								     p))
+						       != '\0') {
+							pos = oldpos + (p - b);
+							fwrite_all(&pos,
+								   sizeof pos,
+								   1, find);
+							fline++;
+							bline++;
+						}
+					}
+					fline++;
+					bline++;
+				}
+				fseeko(fbuf, (off_t)0, SEEK_SET);
+				while ((sz = fread(b, sizeof *b, READBUF,
+						   fbuf)) != 0) {
+					/* No error check for compat. */
+					fwrite_all(b, sizeof *b, sz, save);
+				}
+				if (close_stream(save) != 0) {
+					cmd.count = errno;
+					mesg(_("write failed"));
+					mesg(": ");
+					mesg(p);
+					mesg(strerror(cmd.count));
+					goto newcmd;
+				}
+				fseeko(fbuf, (off_t)0, SEEK_END);
+				mesg(_("saved"));
+				goto newcmd;
+			case 'l':
+				/* Next line. */
+				if (*cmd.cmdline != 'l')
+					eof = 0;
+				if (cmd.count == 0)
+					cmd.count = 1;	/* compat */
+				if (isdigit(cuc(*cmd.cmdline))) {
+					line = cmd.count - 2;
+					dline = 0;
+				} else {
+					if (cmd.count != 1) {
+						line += cmd.count - 1 - pagelen;
+						dline = -1;
+						skip(cmd.count);
+					}
+					/* Nothing to do if (count == 1) */
+				}
+				break;
+			case 'd':
+				/* Half screen forward. */
+			case '\004':	/* ^D */
+				if (*cmd.cmdline != cmd.key)
+					eof = 0;
+				if (cmd.count == 0)
+					cmd.count = 1;	/* compat */
+				line += (cmd.count * pagelen / 2)
+				    - pagelen - 1;
+				dline = -1;
+				skip(cmd.count);
+				break;
+			case 'f':
+				/* Skip forward. */
+				if (cmd.count <= 0)
+					cmd.count = 1;	/* compat */
+				line += cmd.count * pagelen - 2;
+				if (eof)
+					line += 2;
+				if (*cmd.cmdline != 'f')
+					eof = 0;
+				else if (eof)
+					break;
+				if (eofline && line >= eofline)
+					line -= pagelen;
+				dline = -1;
+				skip(cmd.count);
+				break;
+			case '\0':
+				/* Just a number, or '-', or <newline>. */
+				if (cmd.count == 0)
+					cmd.count = 1;	/* compat */
+				if (isdigit(cuc(*cmd.cmdline)))
+					line = (cmd.count - 1) * pagelen - 2;
+				else
+					line += (cmd.count - 1)
+					    * (pagelen - 1) - 2;
+				if (*cmd.cmdline != '\0')
+					eof = 0;
+				if (cmd.count != 1) {
+					skip(cmd.count);
+					dline = -1;
+				} else {
+					dline = 1;
+					line += 2;
+				}
+				break;
+			case '$':
+				/* Advance to EOF. */
+				if (!eof)
+					skip(1);
+				eof = 0;
+				line = LONG_MAX;
+				seekeof = 1;
+				dline = -1;
+				break;
+			case '.':
+			case '\014':	/* ^L */
+				/* Repaint screen. */
+				eof = 0;
+				if (line >= pagelen)
+					line -= pagelen;
+				else
+					line = 0;
+				dline = 0;
+				break;
+			case '!':
+				/* Shell escape. */
+				if (rflag) {
+					mesg(program_invocation_short_name);
+					mesg(_(": !command not allowed in "
+					       "rflag mode.\n"));
+				} else {
+					pid_t cpid;
+
+					write_all(STDOUT_FILENO, cmd.cmdline,
+						  strlen(cmd.cmdline));
+					write_all(STDOUT_FILENO, "\n", 1);
+					my_sigset(SIGINT, SIG_IGN);
+					my_sigset(SIGQUIT, SIG_IGN);
+					switch (cpid = fork()) {
+					case 0:
+					{
+						const char *sh = getenv("SHELL");
+						if (!sh)
+							sh = "/bin/sh";
+						if (!nobuf)
+							fclose(fbuf);
+						fclose(find);
+						if (isatty(0) == 0) {
+							close(0);
+							open(tty, O_RDONLY);
+						} else {
+							fclose(f);
+						}
+						my_sigset(SIGINT, oldint);
+						my_sigset(SIGQUIT, oldquit);
+						my_sigset(SIGTERM, oldterm);
+						execl(sh, sh, "-c",
+						      cmd.cmdline + 1, (char *)NULL);
+						errexec(sh);
+						break;
+					}
+					case -1:
+						mesg(_("fork() failed, "
+						       "try again later\n"));
+						break;
+					default:
+						while (wait(NULL) != cpid) ;
+					}
+					my_sigset(SIGINT, sighandler);
+					my_sigset(SIGQUIT, sighandler);
+					mesg("!\n");
+				}
+				goto newcmd;
+			case 'h':
+				{
+					/* Help! */
+					const char *help = _(helpscreen);
+					write_all(STDOUT_FILENO, copyright,
+						  strlen(copyright));
+					write_all(STDOUT_FILENO, help,
+						  strlen(help));
+					goto newcmd;
+				}
+			case 'n':
+				/* Next file. */
+				if (cmd.count == 0)
+					cmd.count = 1;
+				nextfile = cmd.count;
+				if (checkf()) {
+					nextfile = 1;
+					goto newcmd;
+				}
+				eof = 1;
+				break;
+			case 'p':
+				/* Previous file. */
+				if (cmd.count == 0)
+					cmd.count = 1;
+				nextfile = 0 - cmd.count;
+				if (checkf()) {
+					nextfile = 1;
+					goto newcmd;
+				}
+				eof = 1;
+				break;
+			case 'q':
+			case 'Q':
+				/* Exit pg. */
+				quit(exitstatus);
+				/* NOTREACHED */
+			case 'w':
+			case 'z':
+				/* Set window size. */
+				if (cmd.count < 0)
+					cmd.count = 0;
+				if (*cmd.cmdline != cmd.key)
+					pagelen = ++cmd.count;
+				dline = 1;
+				break;
+			}
+			if (line <= 0) {
+				line = 0;
+				dline = 0;
+			}
+			if (cflag && dline == 1) {
+				dline = 0;
+				line--;
+			}
+		}
+		if (eof)
+			break;
+	}
+	fclose(find);
+	if (!nobuf)
+		fclose(fbuf);
+}
+
+static int parse_arguments(int arg, int argc, char **argv)
+{
+	FILE *input;
+
+	files.first = arg;
+	files.last = arg + argc - 1;
+	for (; argv[arg]; arg += nextfile) {
+		nextfile = 1;
+		files.current = arg;
+		if (argc > 2) {
+			static int firsttime;
+			firsttime++;
+			if (firsttime > 1) {
+				mesg(_("(Next file: "));
+				mesg(argv[arg]);
+				mesg(")");
+ newfile:
+				if (ontty) {
+					prompt(-1);
+					switch (cmd.key) {
+					case 'n':
+						/* Next file. */
+						if (cmd.count == 0)
+							cmd.count = 1;
+						nextfile = cmd.count;
+						if (checkf()) {
+							nextfile = 1;
+							mesg(":");
+							goto newfile;
+						}
+						continue;
+					case 'p':
+						/* Previous file. */
+						if (cmd.count == 0)
+							cmd.count = 1;
+						nextfile = 0 - cmd.count;
+						if (checkf()) {
+							nextfile = 1;
+							mesg(":");
+							goto newfile;
+						}
+						continue;
+					case 'q':
+					case 'Q':
+						quit(exitstatus);
+					}
+				} else
+					mesg("\n");
+			}
+		}
+		if (strcmp(argv[arg], "-") == 0)
+			input = stdin;
+		else {
+			input = fopen(argv[arg], "r");
+			if (input == NULL) {
+				warn("%s", argv[arg]);
+				exitstatus++;
+				continue;
+			}
+		}
+		if (ontty == 0 && argc > 2) {
+			/* Use the prefix as specified by SUSv2. */
+			write_all(STDOUT_FILENO, "::::::::::::::\n", 15);
+			write_all(STDOUT_FILENO, argv[arg], strlen(argv[arg]));
+			write_all(STDOUT_FILENO, "\n::::::::::::::\n", 16);
+		}
+		pgfile(input, argv[arg]);
+		if (input != stdin)
+			fclose(input);
+	}
+	return exitstatus;
+}
+
+int main(int argc, char **argv)
+{
+	int arg, i;
+	char *p;
+
+	xasprintf(&copyright,
+		  _("%s %s Copyright (c) 2000-2001 Gunnar Ritter. All rights reserved.\n"),
+		  program_invocation_short_name, PACKAGE_VERSION);
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+	close_stdout_atexit();
+
+	if (tcgetattr(STDOUT_FILENO, &otio) == 0) {
+		ontty = 1;
+		oldint = my_sigset(SIGINT, sighandler);
+		oldquit = my_sigset(SIGQUIT, sighandler);
+		oldterm = my_sigset(SIGTERM, sighandler);
+		setlocale(LC_CTYPE, "");
+		setlocale(LC_COLLATE, "");
+		tty = ttyname(STDOUT_FILENO);
+		setupterm(NULL, STDOUT_FILENO, &tinfostat);
+		getwinsize();
+		helpscreen = _(helpscreen);
+	}
+	for (arg = 1; argv[arg]; arg++) {
+		if (*argv[arg] == '+')
+			continue;
+		if (*argv[arg] != '-' || argv[arg][1] == '\0')
+			break;
+		argc--;
+
+		if (!strcmp(argv[arg], "--help")) {
+		    usage();
+		}
+
+		if (!strcmp(argv[arg], "--version")) {
+		    print_version(EXIT_SUCCESS);
+		    return EXIT_SUCCESS;
+		}
+
+		for (i = 1; argv[arg][i]; i++) {
+			switch (argv[arg][i]) {
+			case '-':
+				if (i != 1 || argv[arg][i + 1])
+					invopt(&argv[arg][i]);
+				goto endargs;
+			case '1':
+			case '2':
+			case '3':
+			case '4':
+			case '5':
+			case '6':
+			case '7':
+			case '8':
+			case '9':
+			case '0':
+				pagelen = strtol_or_err(argv[arg] + 1,
+						_("failed to parse number of lines per page"));
+				havepagelen = 1;
+				goto nextarg;
+			case 'c':
+				cflag = 1;
+				break;
+			case 'e':
+				eflag = 1;
+				break;
+			case 'f':
+				fflag = 1;
+				break;
+			case 'n':
+				nflag = 1;
+				break;
+			case 'p':
+				if (argv[arg][i + 1]) {
+					pstring = &argv[arg][i + 1];
+				} else if (argv[++arg]) {
+					--argc;
+					pstring = argv[arg];
+				} else
+					needarg("-p");
+				goto nextarg;
+			case 'r':
+				rflag = 1;
+				break;
+			case 's':
+				sflag = 1;
+				break;
+
+			case 'h':
+				usage();
+			case 'V':
+				print_version(EXIT_SUCCESS);
+			default:
+				invopt(&argv[arg][i]);
+			}
+		}
+ nextarg:
+		;
+	}
+ endargs:
+	for (arg = 1; argv[arg]; arg++) {
+		if (*argv[arg] == '-') {
+			if (argv[arg][1] == '-') {
+				arg++;
+				break;
+			}
+			if (argv[arg][1] == '\0')
+				break;
+			if (argv[arg][1] == 'p' && argv[arg][2] == '\0')
+				arg++;
+			continue;
+		}
+		if (*argv[arg] != '+')
+			break;
+		argc--;
+		switch (*(argv[arg] + 1)) {
+		case '\0':
+			needarg("+");
+			/*NOTREACHED*/
+		case '1':
+		case '2':
+		case '3':
+		case '4':
+		case '5':
+		case '6':
+		case '7':
+		case '8':
+		case '9':
+		case '0':
+			startline = strtol_or_err(argv[arg] + 1,
+					_("failed to parse number of lines per page"));
+			break;
+		case '/':
+			searchfor = argv[arg] + 2;
+			if (*searchfor == '\0')
+				needarg("+/");
+			p = searchfor + strlen(searchfor) - 1;
+			if (*p == '/')
+				*p = '\0';
+			if (*searchfor == '\0')
+				needarg("+/");
+			break;
+		default:
+			invopt(argv[arg]);
+		}
+	}
+	if (argc == 1)
+		pgfile(stdin, "stdin");
+	else
+		exitstatus = parse_arguments(arg, argc, argv);
+
+	quit(exitstatus);
+	/* NOTREACHED */
+	return 0;
+}