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-rw-r--r--bin/ed/main.c1394
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diff --git a/bin/ed/main.c b/bin/ed/main.c
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--- /dev/null
+++ b/bin/ed/main.c
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+/* $OpenBSD: main.c,v 1.66 2019/06/28 13:34:59 deraadt Exp $ */
+/* $NetBSD: main.c,v 1.3 1995/03/21 09:04:44 cgd Exp $ */
+
+/* main.c: This file contains the main control and user-interface routines
+ for the ed line editor. */
+/*-
+ * Copyright (c) 1993 Andrew Moore, Talke Studio.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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.
+ */
+
+/*
+ * CREDITS
+ *
+ * This program is based on the editor algorithm described in
+ * Brian W. Kernighan and P. J. Plauger's book "Software Tools
+ * in Pascal," Addison-Wesley, 1981.
+ *
+ * The buffering algorithm is attributed to Rodney Ruddock of
+ * the University of Guelph, Guelph, Ontario.
+ *
+ */
+
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <pwd.h>
+#include <regex.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ed.h"
+
+void signal_hup(int);
+void signal_int(int);
+void handle_winch(int);
+
+static int next_addr(void);
+static int check_addr_range(int, int);
+static int get_matching_node_addr(regex_t *, int);
+static char *get_filename(int);
+static int get_shell_command(void);
+static int append_lines(int);
+static int join_lines(int, int);
+static int move_lines(int);
+static int copy_lines(int);
+static int mark_line_node(line_t *, int);
+static int get_marked_node_addr(int);
+static line_t *dup_line_node(line_t *);
+
+sigjmp_buf env;
+
+/* static buffers */
+static char errmsg[PATH_MAX + 40]; /* error message buffer */
+static char *shcmd; /* shell command buffer */
+static int shcmdsz; /* shell command buffer size */
+static int shcmdi; /* shell command buffer index */
+static char old_filename[PATH_MAX]; /* default filename */
+
+/* global buffers */
+char *ibuf; /* ed command-line buffer */
+int ibufsz; /* ed command-line buffer size */
+char *ibufp; /* pointer to ed command-line buffer */
+
+/* global flags */
+int garrulous = 0; /* if set, print all error messages */
+int isbinary; /* if set, buffer contains ASCII NULs */
+int isglobal; /* if set, doing a global command */
+int modified; /* if set, buffer modified since last write */
+int scripted = 0; /* if set, suppress diagnostics */
+int interactive = 0; /* if set, we are in interactive mode */
+
+volatile sig_atomic_t mutex = 0; /* if set, signals set flags */
+volatile sig_atomic_t sighup = 0; /* if set, sighup received while mutex set */
+volatile sig_atomic_t sigint = 0; /* if set, sigint received while mutex set */
+
+/* if set, signal handlers are enabled */
+volatile sig_atomic_t sigactive = 0;
+
+int current_addr; /* current address in editor buffer */
+int addr_last; /* last address in editor buffer */
+int lineno; /* script line number */
+static char *prompt; /* command-line prompt */
+static char *dps = "*"; /* default command-line prompt */
+
+static const char usage[] = "usage: %s [-] [-s] [-p string] [file]\n";
+
+static char *home; /* home directory */
+
+void
+seterrmsg(char *s)
+{
+ strlcpy(errmsg, s, sizeof(errmsg));
+}
+
+/* ed: line editor */
+int
+main(volatile int argc, char ** volatile argv)
+{
+ int c, n;
+ int status = 0;
+
+ if (pledge("stdio rpath wpath cpath proc exec tty", NULL) == -1)
+ err(1, "pledge");
+
+ home = getenv("HOME");
+
+top:
+ while ((c = getopt(argc, argv, "p:sx")) != -1)
+ switch (c) {
+ case 'p': /* set prompt */
+ dps = prompt = optarg;
+ break;
+ case 's': /* run script */
+ scripted = 1;
+ break;
+ case 'x': /* use crypt */
+ fprintf(stderr, "crypt unavailable\n?\n");
+ break;
+ default:
+ fprintf(stderr, usage, argv[0]);
+ exit(1);
+ }
+ argv += optind;
+ argc -= optind;
+ if (argc && **argv == '-') {
+ scripted = 1;
+ if (argc > 1) {
+ optind = 1;
+ goto top;
+ }
+ argv++;
+ argc--;
+ }
+
+ if (!(interactive = isatty(0))) {
+ struct stat sb;
+
+ /* assert: pipes show up as fifo's when fstat'd */
+ if (fstat(STDIN_FILENO, &sb) || !S_ISFIFO(sb.st_mode)) {
+ if (lseek(STDIN_FILENO, 0, SEEK_CUR)) {
+ interactive = 1;
+ setvbuf(stdout, NULL, _IOLBF, 0);
+ }
+ }
+ }
+
+ /* assert: reliable signals! */
+ if (isatty(STDIN_FILENO)) {
+ handle_winch(SIGWINCH);
+ signal(SIGWINCH, handle_winch);
+ }
+ signal(SIGHUP, signal_hup);
+ signal(SIGQUIT, SIG_IGN);
+ signal(SIGINT, signal_int);
+ if (sigsetjmp(env, 1)) {
+ status = -1;
+ fputs("\n?\n", stderr);
+ seterrmsg("interrupt");
+ } else {
+ init_buffers();
+ sigactive = 1; /* enable signal handlers */
+ if (argc && **argv) {
+ if (read_file(*argv, 0) < 0 && !interactive)
+ quit(2);
+ else if (**argv != '!')
+ strlcpy(old_filename, *argv,
+ sizeof old_filename);
+ } else if (argc) {
+ fputs("?\n", stderr);
+ if (**argv == '\0')
+ seterrmsg("invalid filename");
+ if (!interactive)
+ quit(2);
+ }
+ }
+ for (;;) {
+ if (status < 0 && garrulous)
+ fprintf(stderr, "%s\n", errmsg);
+ if (prompt) {
+ fputs(prompt, stdout);
+ fflush(stdout);
+ }
+ if ((n = get_tty_line()) < 0) {
+ status = ERR;
+ continue;
+ } else if (n == 0) {
+ if (modified && !scripted) {
+ fputs("?\n", stderr);
+ seterrmsg("warning: file modified");
+ if (!interactive) {
+ if (garrulous)
+ fprintf(stderr,
+ "script, line %d: %s\n",
+ lineno, errmsg);
+ quit(2);
+ }
+ clearerr(stdin);
+ modified = 0;
+ status = EMOD;
+ continue;
+ } else
+ quit(0);
+ } else if (ibuf[n - 1] != '\n') {
+ /* discard line */
+ seterrmsg("unexpected end-of-file");
+ clearerr(stdin);
+ status = ERR;
+ continue;
+ }
+ isglobal = 0;
+ if ((status = extract_addr_range()) >= 0 &&
+ (status = exec_command()) >= 0)
+ if (!status || (status &&
+ (status = display_lines(current_addr, current_addr,
+ status)) >= 0))
+ continue;
+ switch (status) {
+ case EOF:
+ quit(0);
+ break;
+ case EMOD:
+ modified = 0;
+ fputs("?\n", stderr); /* give warning */
+ seterrmsg("warning: file modified");
+ if (!interactive) {
+ if (garrulous)
+ fprintf(stderr,
+ "script, line %d: %s\n",
+ lineno, errmsg);
+ quit(2);
+ }
+ break;
+ case FATAL:
+ if (!interactive) {
+ if (garrulous)
+ fprintf(stderr,
+ "script, line %d: %s\n",
+ lineno, errmsg);
+ } else if (garrulous)
+ fprintf(stderr, "%s\n", errmsg);
+ quit(3);
+ break;
+ default:
+ fputs("?\n", stderr);
+ if (!interactive) {
+ if (garrulous)
+ fprintf(stderr,
+ "script, line %d: %s\n",
+ lineno, errmsg);
+ quit(2);
+ }
+ break;
+ }
+ }
+ /*NOTREACHED*/
+}
+
+int first_addr, second_addr, addr_cnt;
+
+/* extract_addr_range: get line addresses from the command buffer until an
+ illegal address is seen; return status */
+int
+extract_addr_range(void)
+{
+ int addr;
+
+ addr_cnt = 0;
+ first_addr = second_addr = current_addr;
+ while ((addr = next_addr()) >= 0) {
+ addr_cnt++;
+ first_addr = second_addr;
+ second_addr = addr;
+ if (*ibufp != ',' && *ibufp != ';')
+ break;
+ else if (*ibufp++ == ';')
+ current_addr = addr;
+ }
+ if ((addr_cnt = min(addr_cnt, 2)) == 1 || second_addr != addr)
+ first_addr = second_addr;
+ return (addr == ERR) ? ERR : 0;
+}
+
+
+#define SKIP_BLANKS() \
+ do { \
+ while (isspace((unsigned char)*ibufp) && *ibufp != '\n') \
+ ibufp++; \
+ } while (0)
+
+#define MUST_BE_FIRST() \
+ do { \
+ if (!first) { \
+ seterrmsg("invalid address"); \
+ return ERR; \
+ } \
+ } while (0)
+
+
+/* next_addr: return the next line address in the command buffer */
+static int
+next_addr(void)
+{
+ char *hd;
+ int addr = current_addr;
+ int n;
+ int first = 1;
+ int c;
+
+ SKIP_BLANKS();
+ for (hd = ibufp;; first = 0)
+ switch ((c = (unsigned char)*ibufp)) {
+ case '+':
+ case '\t':
+ case ' ':
+ case '-':
+ case '^':
+ ibufp++;
+ SKIP_BLANKS();
+ if (isdigit((unsigned char)*ibufp)) {
+ STRTOI(n, ibufp);
+ addr += (c == '-' || c == '^') ? -n : n;
+ } else if (!isspace(c))
+ addr += (c == '-' || c == '^') ? -1 : 1;
+ break;
+ case '0': case '1': case '2':
+ case '3': case '4': case '5':
+ case '6': case '7': case '8': case '9':
+ MUST_BE_FIRST();
+ STRTOI(addr, ibufp);
+ break;
+ case '.':
+ case '$':
+ MUST_BE_FIRST();
+ ibufp++;
+ addr = (c == '.') ? current_addr : addr_last;
+ break;
+ case '/':
+ case '?':
+ MUST_BE_FIRST();
+ if ((addr = get_matching_node_addr(
+ get_compiled_pattern(), c == '/')) < 0)
+ return ERR;
+ else if (c == *ibufp)
+ ibufp++;
+ break;
+ case '\'':
+ MUST_BE_FIRST();
+ ibufp++;
+ if ((addr = get_marked_node_addr((unsigned char)*ibufp++)) < 0)
+ return ERR;
+ break;
+ case '%':
+ case ',':
+ case ';':
+ if (first) {
+ ibufp++;
+ addr_cnt++;
+ second_addr = (c == ';') ? current_addr : 1;
+ if ((addr = next_addr()) < 0)
+ addr = addr_last;
+ break;
+ }
+ /* FALLTHROUGH */
+ default:
+ if (ibufp == hd)
+ return EOF;
+ else if (addr < 0 || addr_last < addr) {
+ seterrmsg("invalid address");
+ return ERR;
+ } else
+ return addr;
+ }
+ /* NOTREACHED */
+}
+
+
+/* GET_THIRD_ADDR: get a legal address from the command buffer */
+#define GET_THIRD_ADDR(addr) \
+ do { \
+ int ol1, ol2; \
+ \
+ ol1 = first_addr; \
+ ol2 = second_addr; \
+ if (extract_addr_range() < 0) \
+ return ERR; \
+ else if (addr_cnt == 0) { \
+ seterrmsg("destination expected"); \
+ return ERR; \
+ } else if (second_addr < 0 || addr_last < second_addr) { \
+ seterrmsg("invalid address"); \
+ return ERR; \
+ } \
+ addr = second_addr; \
+ first_addr = ol1; \
+ second_addr = ol2; \
+ } while (0)
+
+
+/* GET_COMMAND_SUFFIX: verify the command suffix in the command buffer */
+#define GET_COMMAND_SUFFIX() \
+ do { \
+ int done = 0; \
+ do { \
+ switch (*ibufp) { \
+ case 'p': \
+ gflag |= GPR; \
+ ibufp++; \
+ break; \
+ case 'l': \
+ gflag |= GLS; \
+ ibufp++; \
+ break; \
+ case 'n': \
+ gflag |= GNP; \
+ ibufp++; \
+ break; \
+ default: \
+ done++; \
+ } \
+ } while (!done); \
+ if (*ibufp++ != '\n') { \
+ seterrmsg("invalid command suffix"); \
+ return ERR; \
+ } \
+ } while (0)
+
+/* sflags */
+#define SGG 001 /* complement previous global substitute suffix */
+#define SGP 002 /* complement previous print suffix */
+#define SGR 004 /* use last regex instead of last pat */
+#define SGF 010 /* repeat last substitution */
+
+int patlock = 0; /* if set, pattern not freed by get_compiled_pattern() */
+
+volatile sig_atomic_t rows = 22; /* scroll length: ws_row - 2 */
+volatile sig_atomic_t cols = 72; /* wrap column */
+
+/* exec_command: execute the next command in command buffer; return print
+ request, if any */
+int
+exec_command(void)
+{
+ extern int u_current_addr;
+ extern int u_addr_last;
+
+ static regex_t *pat = NULL;
+ static int sgflag = 0;
+ static int sgnum = 0;
+
+ regex_t *tpat;
+ char *fnp;
+ int gflag = 0;
+ int sflags = 0;
+ int addr = 0;
+ int n = 0;
+ int c;
+
+ SKIP_BLANKS();
+ switch ((c = (unsigned char)*ibufp++)) {
+ case 'a':
+ GET_COMMAND_SUFFIX();
+ if (!isglobal) clear_undo_stack();
+ if (append_lines(second_addr) < 0)
+ return ERR;
+ break;
+ case 'c':
+ if (check_addr_range(current_addr, current_addr) < 0)
+ return ERR;
+ GET_COMMAND_SUFFIX();
+ if (!isglobal) clear_undo_stack();
+ if (delete_lines(first_addr, second_addr) < 0 ||
+ append_lines(current_addr) < 0)
+ return ERR;
+ break;
+ case 'd':
+ if (check_addr_range(current_addr, current_addr) < 0)
+ return ERR;
+ GET_COMMAND_SUFFIX();
+ if (!isglobal) clear_undo_stack();
+ if (delete_lines(first_addr, second_addr) < 0)
+ return ERR;
+ else if ((addr = INC_MOD(current_addr, addr_last)) != 0)
+ current_addr = addr;
+ break;
+ case 'e':
+ if (modified && !scripted)
+ return EMOD;
+ /* FALLTHROUGH */
+ case 'E':
+ if (addr_cnt > 0) {
+ seterrmsg("unexpected address");
+ return ERR;
+ } else if (!isspace((unsigned char)*ibufp)) {
+ seterrmsg("unexpected command suffix");
+ return ERR;
+ } else if ((fnp = get_filename(1)) == NULL)
+ return ERR;
+ GET_COMMAND_SUFFIX();
+ if (delete_lines(1, addr_last) < 0)
+ return ERR;
+ clear_undo_stack();
+ if (close_sbuf() < 0)
+ return ERR;
+ else if (open_sbuf() < 0)
+ return FATAL;
+ if (read_file(fnp, 0) < 0)
+ return ERR;
+ clear_undo_stack();
+ modified = 0;
+ u_current_addr = u_addr_last = -1;
+ break;
+ case 'f':
+ if (addr_cnt > 0) {
+ seterrmsg("unexpected address");
+ return ERR;
+ } else if (!isspace((unsigned char)*ibufp)) {
+ seterrmsg("unexpected command suffix");
+ return ERR;
+ } else if ((fnp = get_filename(1)) == NULL)
+ return ERR;
+ else if (*fnp == '!') {
+ seterrmsg("invalid redirection");
+ return ERR;
+ }
+ GET_COMMAND_SUFFIX();
+ puts(strip_escapes(fnp));
+ break;
+ case 'g':
+ case 'v':
+ case 'G':
+ case 'V':
+ if (isglobal) {
+ seterrmsg("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')))
+ GET_COMMAND_SUFFIX();
+ isglobal++;
+ if (exec_global(n, gflag) < 0)
+ return ERR;
+ break;
+ case 'h':
+ if (addr_cnt > 0) {
+ seterrmsg("unexpected address");
+ return ERR;
+ }
+ GET_COMMAND_SUFFIX();
+ if (*errmsg) fprintf(stderr, "%s\n", errmsg);
+ break;
+ case 'H':
+ if (addr_cnt > 0) {
+ seterrmsg("unexpected address");
+ return ERR;
+ }
+ GET_COMMAND_SUFFIX();
+ if ((garrulous = 1 - garrulous) && *errmsg)
+ fprintf(stderr, "%s\n", errmsg);
+ break;
+ case 'i':
+ if (second_addr == 0) {
+ second_addr = 1;
+ }
+ 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 = (unsigned char)*ibufp++;
+ if (second_addr == 0) {
+ seterrmsg("invalid address");
+ return ERR;
+ }
+ GET_COMMAND_SUFFIX();
+ if (mark_line_node(get_addressed_line_node(second_addr), 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) {
+ seterrmsg("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) {
+ seterrmsg("unexpected address");
+ return ERR;
+ }
+ GET_COMMAND_SUFFIX();
+ prompt = prompt ? NULL : optarg ? optarg : dps;
+ break;
+ case 'q':
+ case 'Q':
+ if (addr_cnt > 0) {
+ seterrmsg("unexpected address");
+ return ERR;
+ }
+ GET_COMMAND_SUFFIX();
+ gflag = (modified && !scripted && c == 'q') ? EMOD : EOF;
+ break;
+ case 'r':
+ if (!isspace((unsigned char)*ibufp)) {
+ seterrmsg("unexpected command suffix");
+ return ERR;
+ } else if (addr_cnt == 0)
+ second_addr = addr_last;
+ if ((fnp = get_filename(0)) == NULL)
+ return ERR;
+ GET_COMMAND_SUFFIX();
+ if (!isglobal) clear_undo_stack();
+ if ((addr = read_file(fnp, second_addr)) < 0)
+ return ERR;
+ else if (addr)
+ 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':
+ STRTOI(sgnum, ibufp);
+ sflags |= SGF;
+ sgflag &= ~GSG; /* override GSG */
+ break;
+ default:
+ if (sflags) {
+ seterrmsg("invalid command suffix");
+ return ERR;
+ }
+ }
+ } while (sflags && *ibufp != '\n');
+ if (sflags && !pat) {
+ seterrmsg("no previous substitution");
+ return ERR;
+ } else if (sflags & SGG)
+ sgnum = 0; /* override numeric arg */
+ if (*ibufp != '\n' && *(ibufp + 1) == '\n') {
+ seterrmsg("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) {
+ seterrmsg("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)) {
+ seterrmsg("unexpected command suffix");
+ return ERR;
+ } else if ((fnp = get_filename(0)) == 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 ((addr = write_file(fnp, (c == 'W') ? "a" : "w",
+ first_addr, second_addr)) < 0)
+ return ERR;
+ else if (addr == addr_last && *fnp != '!')
+ modified = 0;
+ else if (modified && !scripted && n == 'q')
+ gflag = EMOD;
+ break;
+ case 'x':
+ if (addr_cnt > 0) {
+ seterrmsg("unexpected address");
+ return ERR;
+ }
+ GET_COMMAND_SUFFIX();
+ seterrmsg("crypt unavailable");
+ return ERR;
+ case 'z':
+ first_addr = 1;
+ if (check_addr_range(first_addr, current_addr + 1) < 0)
+ return ERR;
+ else if ('0' < *ibufp && *ibufp <= '9')
+ STRTOI(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("%d\n", addr_cnt ? second_addr : addr_last);
+ break;
+ case '!':
+ if (addr_cnt > 0) {
+ seterrmsg("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':
+ first_addr = 1;
+ if (check_addr_range(first_addr, current_addr + 1) < 0
+ || display_lines(second_addr, second_addr, 0) < 0)
+ return ERR;
+ break;
+ default:
+ seterrmsg("unknown command");
+ return ERR;
+ }
+ return gflag;
+}
+
+
+/* check_addr_range: return status of address range check */
+static int
+check_addr_range(int n, int m)
+{
+ if (addr_cnt == 0) {
+ first_addr = n;
+ second_addr = m;
+ }
+ if (first_addr > second_addr || 1 > first_addr ||
+ second_addr > addr_last) {
+ seterrmsg("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 */
+static int
+get_matching_node_addr(regex_t *pat, int dir)
+{
+ char *s;
+ int n = current_addr;
+ line_t *lp;
+
+ if (!pat) return ERR;
+ do {
+ if ((n = dir ? INC_MOD(n, addr_last) : DEC_MOD(n, addr_last))) {
+ 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);
+ seterrmsg("no match");
+ return ERR;
+}
+
+
+/* get_filename: return pointer to copy of filename in the command buffer */
+static char *
+get_filename(int save)
+{
+ static char filename[PATH_MAX];
+ char *p;
+ int n;
+
+ if (*ibufp != '\n') {
+ SKIP_BLANKS();
+ if (*ibufp == '\n') {
+ seterrmsg("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 >= PATH_MAX - 1) {
+ seterrmsg("filename too long");
+ return NULL;
+ }
+ } else {
+ if (*old_filename == '\0') {
+ seterrmsg("no current filename");
+ return NULL;
+ }
+ return old_filename;
+ }
+
+ p = save ? old_filename : *old_filename ? filename : old_filename;
+ for (n = 0; *ibufp != '\n';)
+ p[n++] = *ibufp++;
+ p[n] = '\0';
+ return p;
+}
+
+
+/* get_shell_command: read a shell command from stdin; return substitution
+ status */
+static 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 ((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++;
+ }
+ else if (shcmd == NULL)
+ {
+ seterrmsg("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') {
+ seterrmsg("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;
+ }
+ if (i == 1) {
+ seterrmsg("no command");
+ return ERR;
+ }
+ 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 */
+static int
+append_lines(int 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 */
+static int
+join_lines(int from, int 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 */
+static int
+move_lines(int addr)
+{
+ line_t *b1, *a1, *b2, *a2;
+ int n = INC_MOD(second_addr, addr_last);
+ int 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 */
+static int
+copy_lines(int addr)
+{
+ line_t *lp, *np = get_addressed_line_node(first_addr);
+ undo_t *up = NULL;
+ int n = second_addr - first_addr + 1;
+ int 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(int from, int 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(int from, int to, int gflag)
+{
+ line_t *bp;
+ line_t *ep;
+ char *s;
+
+ if (!from) {
+ seterrmsg("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 */
+
+static line_t *mark[MAXMARK]; /* line markers */
+static int markno; /* line marker count */
+
+/* mark_line_node: set a line node mark */
+static int
+mark_line_node(line_t *lp, int n)
+{
+ if (!islower(n)) {
+ seterrmsg("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 */
+static int
+get_marked_node_addr(int n)
+{
+ if (!islower(n)) {
+ seterrmsg("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 */
+static line_t *
+dup_line_node(line_t *lp)
+{
+ line_t *np;
+
+ if ((np = malloc(sizeof(line_t))) == NULL) {
+ perror(NULL);
+ seterrmsg("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 PATH_MAX */
+char *
+strip_escapes(char *s)
+{
+ static char *file = NULL;
+ static int filesz = 0;
+
+ int i = 0;
+
+ REALLOC(file, filesz, PATH_MAX, NULL);
+ /* assert: no trailing escape */
+ while ((file[i++] = (*s == '\\') ? *++s : *s) != '\0' &&
+ i < PATH_MAX-1)
+ s++;
+ file[PATH_MAX-1] = '\0';
+ return file;
+}
+
+
+void
+signal_hup(int signo)
+{
+ int save_errno = errno;
+
+ if (mutex)
+ sighup = 1;
+ else
+ handle_hup(signo);
+ errno = save_errno;
+}
+
+
+void
+signal_int(int signo)
+{
+ int save_errno = errno;
+
+ if (mutex)
+ sigint = 1;
+ else
+ handle_int(signo);
+ errno = save_errno;
+}
+
+
+void
+handle_hup(int signo)
+{
+ char hup[PATH_MAX];
+
+ if (!sigactive)
+ quit(1); /* XXX signal race */
+ sighup = 0;
+ /* XXX signal race */
+ if (addr_last && write_file("ed.hup", "w", 1, addr_last) < 0 &&
+ home != NULL && home[0] == '/') {
+ if (strlcpy(hup, home, sizeof(hup)) < sizeof(hup) &&
+ strlcat(hup, "/ed.hup", sizeof(hup)) < sizeof(hup))
+ write_file(hup, "w", 1, addr_last);
+ }
+ _exit(2);
+}
+
+
+void
+handle_int(int signo)
+{
+ if (!sigactive)
+ _exit(1);
+ sigint = 0;
+ siglongjmp(env, -1);
+}
+
+
+void
+handle_winch(int signo)
+{
+ int save_errno = errno;
+ struct winsize ws; /* window size structure */
+
+ if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) {
+ if (ws.ws_row > 2)
+ rows = ws.ws_row - 2;
+ if (ws.ws_col > 8)
+ cols = ws.ws_col - 8;
+ }
+ errno = save_errno;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 05:44:54 +0000