1426 lines
32 KiB
C
1426 lines
32 KiB
C
/* $NetBSD: main.c,v 1.25 2011/08/21 08:40:31 christos Exp $ */
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/* main.c: This file contains the main control and user-interface routines
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for the ed line editor. */
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/*-
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* Copyright (c) 1993 Andrew Moore, Talke Studio.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT(
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"@(#) Copyright (c) 1993 Andrew Moore, Talke Studio.\
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All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char *rcsid = "@(#)main.c,v 1.1 1994/02/01 00:34:42 alm Exp";
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#else
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__RCSID("$NetBSD: main.c,v 1.25 2011/08/21 08:40:31 christos Exp $");
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#endif
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#endif /* not lint */
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/*
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* CREDITS
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*
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* This program is based on the editor algorithm described in
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* Brian W. Kernighan and P. J. Plauger's book "Software Tools
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* in Pascal," Addison-Wesley, 1981.
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*
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* The buffering algorithm is attributed to Rodney Ruddock of
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* the University of Guelph, Guelph, Ontario.
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*
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* The cbc.c encryption code is adapted from
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* the bdes program by Matt Bishop of Dartmouth College,
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* Hanover, NH.
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*
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*/
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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#include <termios.h>
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#include <ctype.h>
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#include <setjmp.h>
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#include <pwd.h>
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#include "ed.h"
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#ifdef _POSIX_SOURCE
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sigjmp_buf env;
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#else
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jmp_buf env;
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#endif
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/* static buffers */
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char stdinbuf[1]; /* stdin buffer */
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char *shcmd; /* shell command buffer */
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int shcmdsz; /* shell command buffer size */
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int shcmdi; /* shell command buffer index */
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char *ibuf; /* ed command-line buffer */
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int ibufsz; /* ed command-line buffer size */
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char *ibufp; /* pointer to ed command-line buffer */
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/* global flags */
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int des = 0; /* if set, use crypt(3) for i/o */
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int garrulous = 0; /* if set, print all error messages */
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int isbinary; /* if set, buffer contains ASCII NULs */
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int isglobal; /* if set, doing a global command */
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int modified; /* if set, buffer modified since last write */
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int mutex = 0; /* if set, signals set "sigflags" */
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int red = 0; /* if set, restrict shell/directory access */
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int ere = 0; /* if set, use extended regexes */
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int scripted = 0; /* if set, suppress diagnostics */
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int sigflags = 0; /* if set, signals received while mutex set */
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int sigactive = 0; /* if set, signal handlers are enabled */
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char old_filename[MAXPATHLEN + 1] = ""; /* default filename */
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long current_addr; /* current address in editor buffer */
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long addr_last; /* last address in editor buffer */
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int lineno; /* script line number */
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const char *prompt; /* command-line prompt */
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const char *dps = "*"; /* default command-line prompt */
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static const char usage[] = "Usage: %s [-] [-sxE] [-p string] [name]\n";
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/* ed: line editor */
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int
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main(int ac, char *av[])
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{
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int c, n;
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long status = 0;
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volatile int argc = ac;
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char ** volatile argv = av;
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red = (n = strlen(argv[0])) > 2 && argv[0][n - 3] == 'r';
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top:
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while ((c = getopt(argc, argv, "p:sxE")) != -1)
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switch(c) {
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case 'p': /* set prompt */
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prompt = optarg;
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break;
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case 's': /* run script */
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scripted = 1;
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break;
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case 'x': /* use crypt */
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#ifdef DES
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des = get_keyword();
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#else
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fprintf(stderr, "crypt unavailable\n?\n");
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#endif
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break;
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case 'E':
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ere = REG_EXTENDED;
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break;
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default:
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fprintf(stderr, usage, getprogname());
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exit(1);
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/* NOTREACHED */
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}
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argv += optind;
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argc -= optind;
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if (argc && **argv == '-') {
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scripted = 1;
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if (argc > 1) {
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optind = 1;
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goto top;
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}
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argv++;
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argc--;
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}
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/* assert: reliable signals! */
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#ifdef SIGWINCH
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handle_winch(SIGWINCH);
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if (isatty(0)) signal(SIGWINCH, handle_winch);
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#endif
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signal(SIGHUP, signal_hup);
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signal(SIGQUIT, SIG_IGN);
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signal(SIGINT, signal_int);
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#ifdef _POSIX_SOURCE
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if ((status = sigsetjmp(env, 1)) != 0)
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#else
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if ((status = setjmp(env)) != 0)
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#endif
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{
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fputs("\n?\n", stderr);
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sprintf(errmsg, "interrupt");
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} else {
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init_buffers();
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sigactive = 1; /* enable signal handlers */
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if (argc && **argv && is_legal_filename(*argv)) {
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if (read_file(*argv, 0) < 0 && !isatty(0))
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quit(2);
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else if (**argv != '!')
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strlcpy(old_filename, *argv,
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sizeof(old_filename) - 2);
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} else if (argc) {
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fputs("?\n", stderr);
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if (**argv == '\0')
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sprintf(errmsg, "invalid filename");
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if (!isatty(0))
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quit(2);
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}
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}
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for (;;) {
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if (status < 0 && garrulous)
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fprintf(stderr, "%s\n", errmsg);
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if (prompt) {
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printf("%s", prompt);
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fflush(stdout);
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}
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if ((n = get_tty_line()) < 0) {
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status = ERR;
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continue;
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} else if (n == 0) {
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if (modified && !scripted) {
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fputs("?\n", stderr);
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sprintf(errmsg, "warning: file modified");
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if (!isatty(0)) {
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if (garrulous) {
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fprintf(stderr,
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"script, line %d: %s\n",
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lineno, errmsg);
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}
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quit(2);
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}
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clearerr(stdin);
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modified = 0;
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status = EMOD;
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continue;
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} else
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quit(0);
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} else if (ibuf[n - 1] != '\n') {
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/* discard line */
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sprintf(errmsg, "unexpected end-of-file");
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clearerr(stdin);
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status = ERR;
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continue;
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}
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isglobal = 0;
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if ((status = extract_addr_range()) >= 0 &&
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(status = exec_command()) >= 0)
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if (!status || (status &&
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(status = display_lines(current_addr, current_addr,
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status))) >= 0)
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continue;
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switch (status) {
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case EOF:
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quit(0);
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case EMOD:
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modified = 0;
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fputs("?\n", stderr); /* give warning */
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sprintf(errmsg, "warning: file modified");
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if (!isatty(0)) {
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if (garrulous) {
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fprintf(stderr,
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"script, line %d: %s\n",
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lineno, errmsg);
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}
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quit(2);
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}
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break;
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case FATAL:
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if (garrulous) {
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if (!isatty(0)) {
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fprintf(stderr,
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"script, line %d: %s\n",
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lineno, errmsg);
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} else {
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fprintf(stderr, "%s\n", errmsg);
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}
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}
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quit(3);
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default:
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fputs("?\n", stderr);
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if (!isatty(0)) {
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if (garrulous) {
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fprintf(stderr, "script, line %d: %s\n",
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lineno, errmsg);
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}
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quit(2);
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}
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break;
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}
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}
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/* NOTREACHED */
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}
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long first_addr, second_addr, addr_cnt;
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/* extract_addr_range: get line addresses from the command buffer until an
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illegal address is seen; return status */
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int
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extract_addr_range(void)
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{
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long addr;
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addr_cnt = 0;
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first_addr = second_addr = current_addr;
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while ((addr = next_addr()) >= 0) {
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addr_cnt++;
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first_addr = second_addr;
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second_addr = addr;
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if (*ibufp != ',' && *ibufp != ';')
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break;
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else if (*ibufp++ == ';')
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current_addr = addr;
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}
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if ((addr_cnt = min(addr_cnt, 2)) == 1 || second_addr != addr)
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first_addr = second_addr;
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return (addr == ERR) ? ERR : 0;
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}
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#define SKIP_BLANKS() while (isspace((unsigned char)*ibufp) && *ibufp != '\n') \
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ibufp++
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#define MUST_BE_FIRST() \
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if (!first) { sprintf(errmsg, "invalid address"); return ERR; }
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/* next_addr: return the next line address in the command buffer */
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long
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next_addr(void)
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{
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char *hd;
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long addr = current_addr;
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long n;
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int first = 1;
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int c;
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SKIP_BLANKS();
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for (hd = ibufp;; first = 0)
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switch (c = *ibufp) {
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case '+':
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case '\t':
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case ' ':
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case '-':
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case '^':
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ibufp++;
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SKIP_BLANKS();
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if (isdigit((unsigned char)*ibufp)) {
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STRTOL(n, ibufp);
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addr += (c == '-' || c == '^') ? -n : n;
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} else if (!isspace((unsigned char)c))
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addr += (c == '-' || c == '^') ? -1 : 1;
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break;
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case '0': case '1': case '2':
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case '3': case '4': case '5':
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case '6': case '7': case '8': case '9':
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MUST_BE_FIRST();
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STRTOL(addr, ibufp);
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break;
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case '.':
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case '$':
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MUST_BE_FIRST();
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ibufp++;
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addr = (c == '.') ? current_addr : addr_last;
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break;
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case '/':
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case '?':
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MUST_BE_FIRST();
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if ((addr = get_matching_node_addr(
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get_compiled_pattern(), c == '/')) < 0)
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return ERR;
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else if (c == *ibufp)
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ibufp++;
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break;
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case '\'':
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MUST_BE_FIRST();
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ibufp++;
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if ((addr = get_marked_node_addr((unsigned char)*ibufp++)) < 0)
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return ERR;
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break;
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case '%':
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case ',':
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case ';':
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if (first) {
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ibufp++;
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addr_cnt++;
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second_addr = (c == ';') ? current_addr : 1;
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addr = addr_last;
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break;
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}
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/* FALL THROUGH */
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default:
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if (ibufp == hd)
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return EOF;
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else if (addr < 0 || addr_last < addr) {
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sprintf(errmsg, "invalid address");
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return ERR;
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} else
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return addr;
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}
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/* NOTREACHED */
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}
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#ifdef BACKWARDS
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/* GET_THIRD_ADDR: get a legal address from the command buffer */
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#define GET_THIRD_ADDR(addr) \
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{ \
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long ol1, ol2; \
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\
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ol1 = first_addr, ol2 = second_addr; \
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if (extract_addr_range() < 0) \
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return ERR; \
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else if (addr_cnt == 0) { \
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sprintf(errmsg, "destination expected"); \
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return ERR; \
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} else if (second_addr < 0 || addr_last < second_addr) { \
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sprintf(errmsg, "invalid address"); \
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return ERR; \
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} \
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addr = second_addr; \
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first_addr = ol1, second_addr = ol2; \
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}
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#else /* BACKWARDS */
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/* GET_THIRD_ADDR: get a legal address from the command buffer */
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#define GET_THIRD_ADDR(addr) \
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{ \
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long ol1, ol2; \
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\
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ol1 = first_addr, ol2 = second_addr; \
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if (extract_addr_range() < 0) \
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return ERR; \
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if (second_addr < 0 || addr_last < second_addr) { \
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sprintf(errmsg, "invalid address"); \
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return ERR; \
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} \
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addr = second_addr; \
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first_addr = ol1, second_addr = ol2; \
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}
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#endif
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/* GET_COMMAND_SUFFIX: verify the command suffix in the command buffer */
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#define GET_COMMAND_SUFFIX() { \
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int done = 0; \
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do { \
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switch(*ibufp) { \
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case 'p': \
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gflag |= GPR, ibufp++; \
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break; \
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case 'l': \
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gflag |= GLS, ibufp++; \
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break; \
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case 'n': \
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gflag |= GNP, ibufp++; \
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break; \
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default: \
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done++; \
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} \
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} while (!done); \
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if (*ibufp++ != '\n') { \
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sprintf(errmsg, "invalid command suffix"); \
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return ERR; \
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} \
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}
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/* sflags */
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#define SGG 001 /* complement previous global substitute suffix */
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#define SGP 002 /* complement previous print suffix */
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#define SGR 004 /* use last regex instead of last pat */
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#define SGF 010 /* repeat last substitution */
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int patlock = 0; /* if set, pattern not freed by get_compiled_pattern() */
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long rows = 22; /* scroll length: ws_row - 2 */
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/* exec_command: execute the next command in command buffer; return print
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request, if any */
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int
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exec_command(void)
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{
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static pattern_t *pat = NULL;
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static int sgflag = 0;
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static long sgnum = 0;
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pattern_t *tpat;
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char *fnp;
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int gflag = 0;
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int sflags = 0;
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long addr = 0;
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int n = 0;
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int c;
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SKIP_BLANKS();
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switch(c = *ibufp++) {
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case 'a':
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GET_COMMAND_SUFFIX();
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if (!isglobal) clear_undo_stack();
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if (append_lines(second_addr) < 0)
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return ERR;
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break;
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case 'c':
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if (check_addr_range(current_addr, current_addr) < 0)
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return ERR;
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GET_COMMAND_SUFFIX();
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if (!isglobal) clear_undo_stack();
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if (delete_lines(first_addr, second_addr) < 0 ||
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append_lines(current_addr) < 0)
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return ERR;
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break;
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case 'd':
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if (check_addr_range(current_addr, current_addr) < 0)
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return ERR;
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GET_COMMAND_SUFFIX();
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if (!isglobal) clear_undo_stack();
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if (delete_lines(first_addr, second_addr) < 0)
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return ERR;
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else if ((addr = INC_MOD(current_addr, addr_last)) != 0)
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current_addr = addr;
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break;
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case 'e':
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if (modified && !scripted)
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return EMOD;
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/* fall through */
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case 'E':
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if (addr_cnt > 0) {
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sprintf(errmsg, "unexpected address");
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return ERR;
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} else if (!isspace((unsigned char)*ibufp)) {
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sprintf(errmsg, "unexpected command suffix");
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return ERR;
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} else if ((fnp = get_filename()) == NULL)
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return ERR;
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GET_COMMAND_SUFFIX();
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if (delete_lines(1, addr_last) < 0)
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return ERR;
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clear_undo_stack();
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if (close_sbuf() < 0)
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return ERR;
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else if (open_sbuf() < 0)
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return FATAL;
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if (*fnp && *fnp != '!') strlcpy(old_filename, fnp,
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sizeof(old_filename) - 2);
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#ifdef BACKWARDS
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if (*fnp == '\0' && *old_filename == '\0') {
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sprintf(errmsg, "no current filename");
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return ERR;
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}
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#endif
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if (read_file(*fnp ? fnp : old_filename, 0) < 0)
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return ERR;
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clear_undo_stack();
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modified = 0;
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u_current_addr = u_addr_last = -1;
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break;
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case 'f':
|
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if (addr_cnt > 0) {
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sprintf(errmsg, "unexpected address");
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|
return ERR;
|
|
} else if (!isspace((unsigned char)*ibufp)) {
|
|
sprintf(errmsg, "unexpected command suffix");
|
|
return ERR;
|
|
} else if ((fnp = get_filename()) == NULL)
|
|
return ERR;
|
|
else if (*fnp == '!') {
|
|
sprintf(errmsg, "invalid redirection");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
if (*fnp) strlcpy(old_filename, fnp, sizeof(old_filename) - 2);
|
|
printf("%s\n", strip_escapes(old_filename));
|
|
break;
|
|
case 'g':
|
|
case 'v':
|
|
case 'G':
|
|
case 'V':
|
|
if (isglobal) {
|
|
sprintf(errmsg, "cannot nest global commands");
|
|
return ERR;
|
|
} else if (check_addr_range(1, addr_last) < 0)
|
|
return ERR;
|
|
else if (build_active_list(c == 'g' || c == 'G') < 0)
|
|
return ERR;
|
|
else if ((n = (c == 'G' || c == 'V')) != 0)
|
|
GET_COMMAND_SUFFIX();
|
|
isglobal++;
|
|
if (exec_global(n, gflag) < 0)
|
|
return ERR;
|
|
break;
|
|
case 'h':
|
|
if (addr_cnt > 0) {
|
|
sprintf(errmsg, "unexpected address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
if (*errmsg) fprintf(stderr, "%s\n", errmsg);
|
|
break;
|
|
case 'H':
|
|
if (addr_cnt > 0) {
|
|
sprintf(errmsg, "unexpected address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
if ((garrulous = 1 - garrulous) && *errmsg)
|
|
fprintf(stderr, "%s\n", errmsg);
|
|
break;
|
|
case 'i':
|
|
if (second_addr == 0) {
|
|
sprintf(errmsg, "invalid address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
if (!isglobal) clear_undo_stack();
|
|
if (append_lines(second_addr - 1) < 0)
|
|
return ERR;
|
|
break;
|
|
case 'j':
|
|
if (check_addr_range(current_addr, current_addr + 1) < 0)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (!isglobal) clear_undo_stack();
|
|
if (first_addr != second_addr &&
|
|
join_lines(first_addr, second_addr) < 0)
|
|
return ERR;
|
|
break;
|
|
case 'k':
|
|
c = *ibufp++;
|
|
if (second_addr == 0) {
|
|
sprintf(errmsg, "invalid address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
if (mark_line_node(get_addressed_line_node(second_addr), (unsigned char)c) < 0)
|
|
return ERR;
|
|
break;
|
|
case 'l':
|
|
if (check_addr_range(current_addr, current_addr) < 0)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (display_lines(first_addr, second_addr, gflag | GLS) < 0)
|
|
return ERR;
|
|
gflag = 0;
|
|
break;
|
|
case 'm':
|
|
if (check_addr_range(current_addr, current_addr) < 0)
|
|
return ERR;
|
|
GET_THIRD_ADDR(addr);
|
|
if (first_addr <= addr && addr < second_addr) {
|
|
sprintf(errmsg, "invalid destination");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
if (!isglobal) clear_undo_stack();
|
|
if (move_lines(addr) < 0)
|
|
return ERR;
|
|
break;
|
|
case 'n':
|
|
if (check_addr_range(current_addr, current_addr) < 0)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (display_lines(first_addr, second_addr, gflag | GNP) < 0)
|
|
return ERR;
|
|
gflag = 0;
|
|
break;
|
|
case 'p':
|
|
if (check_addr_range(current_addr, current_addr) < 0)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (display_lines(first_addr, second_addr, gflag | GPR) < 0)
|
|
return ERR;
|
|
gflag = 0;
|
|
break;
|
|
case 'P':
|
|
if (addr_cnt > 0) {
|
|
sprintf(errmsg, "unexpected address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
prompt = prompt ? NULL : optarg ? optarg : dps;
|
|
break;
|
|
case 'q':
|
|
case 'Q':
|
|
if (addr_cnt > 0) {
|
|
sprintf(errmsg, "unexpected address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
gflag = (modified && !scripted && c == 'q') ? EMOD : EOF;
|
|
break;
|
|
case 'r':
|
|
if (!isspace((unsigned char)*ibufp)) {
|
|
sprintf(errmsg, "unexpected command suffix");
|
|
return ERR;
|
|
} else if (addr_cnt == 0)
|
|
second_addr = addr_last;
|
|
if ((fnp = get_filename()) == NULL)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (!isglobal) clear_undo_stack();
|
|
if (*old_filename == '\0' && *fnp != '!')
|
|
strlcpy(old_filename, fnp, sizeof(old_filename) - 2);
|
|
#ifdef BACKWARDS
|
|
if (*fnp == '\0' && *old_filename == '\0') {
|
|
sprintf(errmsg, "no current filename");
|
|
return ERR;
|
|
}
|
|
#endif
|
|
if ((addr = read_file(*fnp ? fnp : old_filename, second_addr)) < 0)
|
|
return ERR;
|
|
else if (addr && addr != addr_last)
|
|
modified = 1;
|
|
break;
|
|
case 's':
|
|
do {
|
|
switch(*ibufp) {
|
|
case '\n':
|
|
sflags |=SGF;
|
|
break;
|
|
case 'g':
|
|
sflags |= SGG;
|
|
ibufp++;
|
|
break;
|
|
case 'p':
|
|
sflags |= SGP;
|
|
ibufp++;
|
|
break;
|
|
case 'r':
|
|
sflags |= SGR;
|
|
ibufp++;
|
|
break;
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
STRTOL(sgnum, ibufp);
|
|
sflags |= SGF;
|
|
sgflag &= ~GSG; /* override GSG */
|
|
break;
|
|
default:
|
|
if (sflags) {
|
|
sprintf(errmsg, "invalid command suffix");
|
|
return ERR;
|
|
}
|
|
}
|
|
} while (sflags && *ibufp != '\n');
|
|
if (sflags && !pat) {
|
|
sprintf(errmsg, "no previous substitution");
|
|
return ERR;
|
|
} else if (sflags & SGG)
|
|
sgnum = 0; /* override numeric arg */
|
|
if (*ibufp != '\n' && *(ibufp + 1) == '\n') {
|
|
sprintf(errmsg, "invalid pattern delimiter");
|
|
return ERR;
|
|
}
|
|
tpat = pat;
|
|
SPL1();
|
|
if ((!sflags || (sflags & SGR)) &&
|
|
(tpat = get_compiled_pattern()) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
} else if (tpat != pat) {
|
|
if (pat) {
|
|
regfree(pat);
|
|
free(pat);
|
|
}
|
|
pat = tpat;
|
|
patlock = 1; /* reserve pattern */
|
|
}
|
|
SPL0();
|
|
if (!sflags && extract_subst_tail(&sgflag, &sgnum) < 0)
|
|
return ERR;
|
|
else if (isglobal)
|
|
sgflag |= GLB;
|
|
else
|
|
sgflag &= ~GLB;
|
|
if (sflags & SGG)
|
|
sgflag ^= GSG;
|
|
if (sflags & SGP)
|
|
sgflag ^= GPR, sgflag &= ~(GLS | GNP);
|
|
do {
|
|
switch(*ibufp) {
|
|
case 'p':
|
|
sgflag |= GPR, ibufp++;
|
|
break;
|
|
case 'l':
|
|
sgflag |= GLS, ibufp++;
|
|
break;
|
|
case 'n':
|
|
sgflag |= GNP, ibufp++;
|
|
break;
|
|
default:
|
|
n++;
|
|
}
|
|
} while (!n);
|
|
if (check_addr_range(current_addr, current_addr) < 0)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (!isglobal) clear_undo_stack();
|
|
if (search_and_replace(pat, sgflag, sgnum) < 0)
|
|
return ERR;
|
|
break;
|
|
case 't':
|
|
if (check_addr_range(current_addr, current_addr) < 0)
|
|
return ERR;
|
|
GET_THIRD_ADDR(addr);
|
|
GET_COMMAND_SUFFIX();
|
|
if (!isglobal) clear_undo_stack();
|
|
if (copy_lines(addr) < 0)
|
|
return ERR;
|
|
break;
|
|
case 'u':
|
|
if (addr_cnt > 0) {
|
|
sprintf(errmsg, "unexpected address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
if (pop_undo_stack() < 0)
|
|
return ERR;
|
|
break;
|
|
case 'w':
|
|
case 'W':
|
|
if ((n = *ibufp) == 'q' || n == 'Q') {
|
|
gflag = EOF;
|
|
ibufp++;
|
|
}
|
|
if (!isspace((unsigned char)*ibufp)) {
|
|
sprintf(errmsg, "unexpected command suffix");
|
|
return ERR;
|
|
} else if ((fnp = get_filename()) == NULL)
|
|
return ERR;
|
|
if (addr_cnt == 0 && !addr_last)
|
|
first_addr = second_addr = 0;
|
|
else if (check_addr_range(1, addr_last) < 0)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (*old_filename == '\0' && *fnp != '!')
|
|
strlcpy(old_filename, fnp, sizeof(old_filename) - 2);
|
|
#ifdef BACKWARDS
|
|
if (*fnp == '\0' && *old_filename == '\0') {
|
|
sprintf(errmsg, "no current filename");
|
|
return ERR;
|
|
}
|
|
#endif
|
|
if ((addr = write_file(*fnp ? fnp : old_filename,
|
|
(c == 'W') ? "a" : "w", first_addr, second_addr)) < 0)
|
|
return ERR;
|
|
else if (addr == addr_last)
|
|
modified = 0;
|
|
else if (modified && !scripted && n == 'q')
|
|
gflag = EMOD;
|
|
break;
|
|
case 'x':
|
|
if (addr_cnt > 0) {
|
|
sprintf(errmsg, "unexpected address");
|
|
return ERR;
|
|
}
|
|
GET_COMMAND_SUFFIX();
|
|
#ifdef DES
|
|
des = get_keyword();
|
|
#else
|
|
sprintf(errmsg, "crypt unavailable");
|
|
return ERR;
|
|
#endif
|
|
break;
|
|
case 'z':
|
|
#ifdef BACKWARDS
|
|
if (check_addr_range(first_addr = 1, current_addr + 1) < 0)
|
|
#else
|
|
if (check_addr_range(first_addr = 1, current_addr + !isglobal) < 0)
|
|
#endif
|
|
return ERR;
|
|
else if ('0' < *ibufp && *ibufp <= '9')
|
|
STRTOL(rows, ibufp);
|
|
GET_COMMAND_SUFFIX();
|
|
if (display_lines(second_addr, min(addr_last,
|
|
second_addr + rows), gflag) < 0)
|
|
return ERR;
|
|
gflag = 0;
|
|
break;
|
|
case '=':
|
|
GET_COMMAND_SUFFIX();
|
|
printf("%ld\n", addr_cnt ? second_addr : addr_last);
|
|
break;
|
|
case '!':
|
|
if (addr_cnt > 0) {
|
|
sprintf(errmsg, "unexpected address");
|
|
return ERR;
|
|
} else if ((sflags = get_shell_command()) < 0)
|
|
return ERR;
|
|
GET_COMMAND_SUFFIX();
|
|
if (sflags) printf("%s\n", shcmd + 1);
|
|
system(shcmd + 1);
|
|
if (!scripted) printf("!\n");
|
|
break;
|
|
case '\n':
|
|
#ifdef BACKWARDS
|
|
if (check_addr_range(first_addr = 1, current_addr + 1) < 0
|
|
#else
|
|
if (check_addr_range(first_addr = 1, current_addr + !isglobal) < 0
|
|
#endif
|
|
|| display_lines(second_addr, second_addr, 0) < 0)
|
|
return ERR;
|
|
break;
|
|
default:
|
|
sprintf(errmsg, "unknown command");
|
|
return ERR;
|
|
}
|
|
return gflag;
|
|
}
|
|
|
|
|
|
/* check_addr_range: return status of address range check */
|
|
int
|
|
check_addr_range(long n, long m)
|
|
{
|
|
if (addr_cnt == 0) {
|
|
first_addr = n;
|
|
second_addr = m;
|
|
}
|
|
if (first_addr > second_addr || 1 > first_addr ||
|
|
second_addr > addr_last) {
|
|
sprintf(errmsg, "invalid address");
|
|
return ERR;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* get_matching_node_addr: return the address of the next line matching a
|
|
pattern in a given direction. wrap around begin/end of editor buffer if
|
|
necessary */
|
|
long
|
|
get_matching_node_addr(pattern_t *pat, int dir)
|
|
{
|
|
char *s;
|
|
long n = current_addr;
|
|
line_t *lp;
|
|
|
|
if (!pat) return ERR;
|
|
do {
|
|
if ((n = dir ? INC_MOD(n, addr_last) :
|
|
DEC_MOD(n, addr_last)) != 0) {
|
|
lp = get_addressed_line_node(n);
|
|
if ((s = get_sbuf_line(lp)) == NULL)
|
|
return ERR;
|
|
if (isbinary)
|
|
NUL_TO_NEWLINE(s, lp->len);
|
|
if (!regexec(pat, s, 0, NULL, 0))
|
|
return n;
|
|
}
|
|
} while (n != current_addr);
|
|
sprintf(errmsg, "no match");
|
|
return ERR;
|
|
}
|
|
|
|
|
|
/* get_filename: return pointer to copy of filename in the command buffer */
|
|
char *
|
|
get_filename(void)
|
|
{
|
|
static char *file = NULL;
|
|
static int filesz = 0;
|
|
|
|
int n;
|
|
|
|
if (*ibufp != '\n') {
|
|
SKIP_BLANKS();
|
|
if (*ibufp == '\n') {
|
|
sprintf(errmsg, "invalid filename");
|
|
return NULL;
|
|
} else if ((ibufp = get_extended_line(&n, 1)) == NULL)
|
|
return NULL;
|
|
else if (*ibufp == '!') {
|
|
ibufp++;
|
|
if ((n = get_shell_command()) < 0)
|
|
return NULL;
|
|
if (n) printf("%s\n", shcmd + 1);
|
|
return shcmd;
|
|
} else if (n - 1 > MAXPATHLEN) {
|
|
sprintf(errmsg, "filename too long");
|
|
return NULL;
|
|
}
|
|
}
|
|
#ifndef BACKWARDS
|
|
else if (*old_filename == '\0') {
|
|
sprintf(errmsg, "no current filename");
|
|
return NULL;
|
|
}
|
|
#endif
|
|
REALLOC(file, filesz, MAXPATHLEN + 1, NULL);
|
|
for (n = 0; *ibufp != '\n';)
|
|
file[n++] = *ibufp++;
|
|
file[n] = '\0';
|
|
return is_legal_filename(file) ? file : NULL;
|
|
}
|
|
|
|
|
|
/* get_shell_command: read a shell command from stdin; return substitution
|
|
status */
|
|
int
|
|
get_shell_command(void)
|
|
{
|
|
static char *buf = NULL;
|
|
static int n = 0;
|
|
|
|
char *s; /* substitution char pointer */
|
|
int i = 0;
|
|
int j = 0;
|
|
|
|
if (red) {
|
|
sprintf(errmsg, "shell access restricted");
|
|
return ERR;
|
|
} else if ((s = ibufp = get_extended_line(&j, 1)) == NULL)
|
|
return ERR;
|
|
REALLOC(buf, n, j + 1, ERR);
|
|
buf[i++] = '!'; /* prefix command w/ bang */
|
|
while (*ibufp != '\n')
|
|
switch (*ibufp) {
|
|
default:
|
|
REALLOC(buf, n, i + 2, ERR);
|
|
buf[i++] = *ibufp;
|
|
if (*ibufp++ == '\\')
|
|
buf[i++] = *ibufp++;
|
|
break;
|
|
case '!':
|
|
if (s != ibufp) {
|
|
REALLOC(buf, n, i + 1, ERR);
|
|
buf[i++] = *ibufp++;
|
|
}
|
|
#ifdef BACKWARDS
|
|
else if (shcmd == NULL || *(shcmd + 1) == '\0')
|
|
#else
|
|
else if (shcmd == NULL)
|
|
#endif
|
|
{
|
|
sprintf(errmsg, "no previous command");
|
|
return ERR;
|
|
} else {
|
|
REALLOC(buf, n, i + shcmdi, ERR);
|
|
for (s = shcmd + 1; s < shcmd + shcmdi;)
|
|
buf[i++] = *s++;
|
|
s = ibufp++;
|
|
}
|
|
break;
|
|
case '%':
|
|
if (*old_filename == '\0') {
|
|
sprintf(errmsg, "no current filename");
|
|
return ERR;
|
|
}
|
|
j = strlen(s = strip_escapes(old_filename));
|
|
REALLOC(buf, n, i + j, ERR);
|
|
while (j--)
|
|
buf[i++] = *s++;
|
|
s = ibufp++;
|
|
break;
|
|
}
|
|
REALLOC(shcmd, shcmdsz, i + 1, ERR);
|
|
memcpy(shcmd, buf, i);
|
|
shcmd[shcmdi = i] = '\0';
|
|
return *s == '!' || *s == '%';
|
|
}
|
|
|
|
|
|
/* append_lines: insert text from stdin to after line n; stop when either a
|
|
single period is read or EOF; return status */
|
|
int
|
|
append_lines(long n)
|
|
{
|
|
int l;
|
|
char *lp = ibuf;
|
|
char *eot;
|
|
undo_t *up = NULL;
|
|
|
|
for (current_addr = n;;) {
|
|
if (!isglobal) {
|
|
if ((l = get_tty_line()) < 0)
|
|
return ERR;
|
|
else if (l == 0 || ibuf[l - 1] != '\n') {
|
|
clearerr(stdin);
|
|
return l ? EOF : 0;
|
|
}
|
|
lp = ibuf;
|
|
} else if (*(lp = ibufp) == '\0')
|
|
return 0;
|
|
else {
|
|
while (*ibufp++ != '\n')
|
|
;
|
|
l = ibufp - lp;
|
|
}
|
|
if (l == 2 && lp[0] == '.' && lp[1] == '\n') {
|
|
return 0;
|
|
}
|
|
eot = lp + l;
|
|
SPL1();
|
|
do {
|
|
if ((lp = put_sbuf_line(lp)) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
} else if (up)
|
|
up->t = get_addressed_line_node(current_addr);
|
|
else if ((up = push_undo_stack(UADD, current_addr,
|
|
current_addr)) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
}
|
|
} while (lp != eot);
|
|
modified = 1;
|
|
SPL0();
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
|
|
/* join_lines: replace a range of lines with the joined text of those lines */
|
|
int
|
|
join_lines(long from, long to)
|
|
{
|
|
static char *buf = NULL;
|
|
static int n;
|
|
|
|
char *s;
|
|
int size = 0;
|
|
line_t *bp, *ep;
|
|
|
|
ep = get_addressed_line_node(INC_MOD(to, addr_last));
|
|
bp = get_addressed_line_node(from);
|
|
for (; bp != ep; bp = bp->q_forw) {
|
|
if ((s = get_sbuf_line(bp)) == NULL)
|
|
return ERR;
|
|
REALLOC(buf, n, size + bp->len, ERR);
|
|
memcpy(buf + size, s, bp->len);
|
|
size += bp->len;
|
|
}
|
|
REALLOC(buf, n, size + 2, ERR);
|
|
memcpy(buf + size, "\n", 2);
|
|
if (delete_lines(from, to) < 0)
|
|
return ERR;
|
|
current_addr = from - 1;
|
|
SPL1();
|
|
if (put_sbuf_line(buf) == NULL ||
|
|
push_undo_stack(UADD, current_addr, current_addr) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
}
|
|
modified = 1;
|
|
SPL0();
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* move_lines: move a range of lines */
|
|
int
|
|
move_lines(long addr)
|
|
{
|
|
line_t *b1, *a1, *b2, *a2;
|
|
long n = INC_MOD(second_addr, addr_last);
|
|
long p = first_addr - 1;
|
|
int done = (addr == first_addr - 1 || addr == second_addr);
|
|
|
|
SPL1();
|
|
if (done) {
|
|
a2 = get_addressed_line_node(n);
|
|
b2 = get_addressed_line_node(p);
|
|
current_addr = second_addr;
|
|
} else if (push_undo_stack(UMOV, p, n) == NULL ||
|
|
push_undo_stack(UMOV, addr, INC_MOD(addr, addr_last)) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
} else {
|
|
a1 = get_addressed_line_node(n);
|
|
if (addr < first_addr) {
|
|
b1 = get_addressed_line_node(p);
|
|
b2 = get_addressed_line_node(addr);
|
|
/* this get_addressed_line_node last! */
|
|
} else {
|
|
b2 = get_addressed_line_node(addr);
|
|
b1 = get_addressed_line_node(p);
|
|
/* this get_addressed_line_node last! */
|
|
}
|
|
a2 = b2->q_forw;
|
|
REQUE(b2, b1->q_forw);
|
|
REQUE(a1->q_back, a2);
|
|
REQUE(b1, a1);
|
|
current_addr = addr + ((addr < first_addr) ?
|
|
second_addr - first_addr + 1 : 0);
|
|
}
|
|
if (isglobal)
|
|
unset_active_nodes(b2->q_forw, a2);
|
|
modified = 1;
|
|
SPL0();
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* copy_lines: copy a range of lines; return status */
|
|
int
|
|
copy_lines(long addr)
|
|
{
|
|
line_t *lp, *np = get_addressed_line_node(first_addr);
|
|
undo_t *up = NULL;
|
|
long n = second_addr - first_addr + 1;
|
|
long m = 0;
|
|
|
|
current_addr = addr;
|
|
if (first_addr <= addr && addr < second_addr) {
|
|
n = addr - first_addr + 1;
|
|
m = second_addr - addr;
|
|
}
|
|
for (; n > 0; n=m, m=0, np = get_addressed_line_node(current_addr + 1))
|
|
for (; n-- > 0; np = np->q_forw) {
|
|
SPL1();
|
|
if ((lp = dup_line_node(np)) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
}
|
|
add_line_node(lp);
|
|
if (up)
|
|
up->t = lp;
|
|
else if ((up = push_undo_stack(UADD, current_addr,
|
|
current_addr)) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
}
|
|
modified = 1;
|
|
SPL0();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* delete_lines: delete a range of lines */
|
|
int
|
|
delete_lines(long from, long to)
|
|
{
|
|
line_t *n, *p;
|
|
|
|
SPL1();
|
|
if (push_undo_stack(UDEL, from, to) == NULL) {
|
|
SPL0();
|
|
return ERR;
|
|
}
|
|
n = get_addressed_line_node(INC_MOD(to, addr_last));
|
|
p = get_addressed_line_node(from - 1);
|
|
/* this get_addressed_line_node last! */
|
|
if (isglobal)
|
|
unset_active_nodes(p->q_forw, n);
|
|
REQUE(p, n);
|
|
addr_last -= to - from + 1;
|
|
current_addr = from - 1;
|
|
modified = 1;
|
|
SPL0();
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* display_lines: print a range of lines to stdout */
|
|
int
|
|
display_lines(long from, long to, int gflag)
|
|
{
|
|
line_t *bp;
|
|
line_t *ep;
|
|
char *s;
|
|
|
|
if (!from) {
|
|
sprintf(errmsg, "invalid address");
|
|
return ERR;
|
|
}
|
|
ep = get_addressed_line_node(INC_MOD(to, addr_last));
|
|
bp = get_addressed_line_node(from);
|
|
for (; bp != ep; bp = bp->q_forw) {
|
|
if ((s = get_sbuf_line(bp)) == NULL)
|
|
return ERR;
|
|
if (put_tty_line(s, bp->len, current_addr = from++, gflag) < 0)
|
|
return ERR;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
#define MAXMARK 26 /* max number of marks */
|
|
|
|
line_t *mark[MAXMARK]; /* line markers */
|
|
int markno; /* line marker count */
|
|
|
|
/* mark_line_node: set a line node mark */
|
|
int
|
|
mark_line_node(line_t *lp, int n)
|
|
{
|
|
if (!islower(n)) {
|
|
sprintf(errmsg, "invalid mark character");
|
|
return ERR;
|
|
} else if (mark[n - 'a'] == NULL)
|
|
markno++;
|
|
mark[n - 'a'] = lp;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* get_marked_node_addr: return address of a marked line */
|
|
long
|
|
get_marked_node_addr(int n)
|
|
{
|
|
if (!islower(n)) {
|
|
sprintf(errmsg, "invalid mark character");
|
|
return ERR;
|
|
}
|
|
return get_line_node_addr(mark[n - 'a']);
|
|
}
|
|
|
|
|
|
/* unmark_line_node: clear line node mark */
|
|
void
|
|
unmark_line_node(line_t *lp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; markno && i < MAXMARK; i++)
|
|
if (mark[i] == lp) {
|
|
mark[i] = NULL;
|
|
markno--;
|
|
}
|
|
}
|
|
|
|
|
|
/* dup_line_node: return a pointer to a copy of a line node */
|
|
line_t *
|
|
dup_line_node(line_t *lp)
|
|
{
|
|
line_t *np;
|
|
|
|
if ((np = (line_t *) malloc(sizeof(line_t))) == NULL) {
|
|
fprintf(stderr, "%s\n", strerror(errno));
|
|
sprintf(errmsg, "out of memory");
|
|
return NULL;
|
|
}
|
|
np->seek = lp->seek;
|
|
np->len = lp->len;
|
|
return np;
|
|
}
|
|
|
|
|
|
/* has_trailing_escape: return the parity of escapes preceding a character
|
|
in a string */
|
|
int
|
|
has_trailing_escape(char *s, char *t)
|
|
{
|
|
return (s == t || *(t - 1) != '\\') ? 0 : !has_trailing_escape(s, t - 1);
|
|
}
|
|
|
|
|
|
/* strip_escapes: return copy of escaped string of at most length MAXPATHLEN */
|
|
char *
|
|
strip_escapes(const char *s)
|
|
{
|
|
static char *file = NULL;
|
|
static int filesz = 0;
|
|
|
|
int i = 0;
|
|
|
|
REALLOC(file, filesz, MAXPATHLEN + 1, NULL);
|
|
while ((i < (filesz - 1)) &&
|
|
(file[i++] = (*s == '\\') != '\0' ? *++s : *s))
|
|
s++;
|
|
file[filesz - 1] = '\0';
|
|
return file;
|
|
}
|
|
|
|
|
|
void
|
|
signal_hup(int signo)
|
|
{
|
|
if (mutex)
|
|
sigflags |= (1 << (signo - 1));
|
|
else handle_hup(signo);
|
|
}
|
|
|
|
|
|
void
|
|
signal_int(int signo)
|
|
{
|
|
if (mutex)
|
|
sigflags |= (1 << (signo - 1));
|
|
else handle_int(signo);
|
|
}
|
|
|
|
|
|
void
|
|
handle_hup(int signo)
|
|
{
|
|
char *hup = NULL; /* hup filename */
|
|
char *s;
|
|
int n;
|
|
|
|
if (!sigactive)
|
|
quit(1);
|
|
sigflags &= ~(1 << (signo - 1));
|
|
if (addr_last && write_file("ed.hup", "w", 1, addr_last) < 0 &&
|
|
(s = getenv("HOME")) != NULL &&
|
|
(n = strlen(s)) + 8 <= MAXPATHLEN && /* "ed.hup" + '/' */
|
|
(hup = (char *) malloc(n + 10)) != NULL) {
|
|
strcpy(hup, s);
|
|
if (hup[n - 1] != '/')
|
|
hup[n] = '/', hup[n+1] = '\0';
|
|
strcat(hup, "ed.hup");
|
|
write_file(hup, "w", 1, addr_last);
|
|
}
|
|
quit(2);
|
|
}
|
|
|
|
|
|
void
|
|
handle_int(int signo)
|
|
{
|
|
if (!sigactive)
|
|
quit(1);
|
|
sigflags &= ~(1 << (signo - 1));
|
|
#ifdef _POSIX_SOURCE
|
|
siglongjmp(env, -1);
|
|
#else
|
|
longjmp(env, -1);
|
|
#endif
|
|
}
|
|
|
|
|
|
int cols = 72; /* wrap column */
|
|
|
|
void
|
|
handle_winch(int signo)
|
|
{
|
|
struct winsize ws; /* window size structure */
|
|
|
|
sigflags &= ~(1 << (signo - 1));
|
|
if (ioctl(0, TIOCGWINSZ, (char *) &ws) >= 0) {
|
|
if (ws.ws_row > 2) rows = ws.ws_row - 2;
|
|
if (ws.ws_col > 8) cols = ws.ws_col - 8;
|
|
}
|
|
}
|
|
|
|
|
|
/* is_legal_filename: return a legal filename */
|
|
int
|
|
is_legal_filename(char *s)
|
|
{
|
|
if (red && (*s == '!' || !strcmp(s, "..") || strchr(s, '/'))) {
|
|
sprintf(errmsg, "shell access restricted");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|