801 lines
16 KiB
C
801 lines
16 KiB
C
/* $NetBSD: ex_script.c,v 1.7 1998/01/09 08:08:01 perry Exp $ */
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/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Brian Hirt.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)ex_script.c 10.29 (Berkeley) 5/12/96";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/queue.h>
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include <sys/stat.h>
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#ifdef HAVE_SYS5_PTY
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#include <sys/stropts.h>
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#endif
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <bitstring.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h> /* XXX: OSF/1 bug: include before <grp.h> */
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#include <grp.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "../common/common.h"
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#include "../vi/vi.h"
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#include "script.h"
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#include "pathnames.h"
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static void sscr_check __P((SCR *));
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static int sscr_getprompt __P((SCR *));
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static int sscr_init __P((SCR *));
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static int sscr_insert __P((SCR *));
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static int sscr_matchprompt __P((SCR *, char *, size_t, size_t *));
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static int sscr_pty __P((int *, int *, char *, struct termios *, void *));
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static int sscr_setprompt __P((SCR *, char *, size_t));
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/*
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* ex_script -- : sc[ript][!] [file]
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* Switch to script mode.
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*
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* PUBLIC: int ex_script __P((SCR *, EXCMD *));
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*/
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int
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ex_script(sp, cmdp)
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SCR *sp;
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EXCMD *cmdp;
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{
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/* Vi only command. */
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if (!F_ISSET(sp, SC_VI)) {
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msgq(sp, M_ERR,
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"150|The script command is only available in vi mode");
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return (1);
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}
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/* Switch to the new file. */
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if (cmdp->argc != 0 && ex_edit(sp, cmdp))
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return (1);
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/* Create the shell, figure out the prompt. */
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if (sscr_init(sp))
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return (1);
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return (0);
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}
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/*
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* sscr_init --
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* Create a pty setup for a shell.
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*/
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static int
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sscr_init(sp)
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SCR *sp;
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{
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SCRIPT *sc;
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char *sh, *sh_path;
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/* We're going to need a shell. */
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if (opts_empty(sp, O_SHELL, 0))
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return (1);
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MALLOC_RET(sp, sc, SCRIPT *, sizeof(SCRIPT));
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sp->script = sc;
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sc->sh_prompt = NULL;
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sc->sh_prompt_len = 0;
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/*
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* There are two different processes running through this code.
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* They are the shell and the parent.
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*/
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sc->sh_master = sc->sh_slave = -1;
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if (tcgetattr(STDIN_FILENO, &sc->sh_term) == -1) {
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msgq(sp, M_SYSERR, "tcgetattr");
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goto err;
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}
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/*
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* Turn off output postprocessing and echo.
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*/
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sc->sh_term.c_oflag &= ~OPOST;
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sc->sh_term.c_cflag &= ~(ECHO|ECHOE|ECHONL|ECHOK);
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#ifdef TIOCGWINSZ
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &sc->sh_win) == -1) {
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msgq(sp, M_SYSERR, "tcgetattr");
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goto err;
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}
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if (sscr_pty(&sc->sh_master,
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&sc->sh_slave, sc->sh_name, &sc->sh_term, &sc->sh_win) == -1) {
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msgq(sp, M_SYSERR, "pty");
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goto err;
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}
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#else
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if (sscr_pty(&sc->sh_master,
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&sc->sh_slave, sc->sh_name, &sc->sh_term, NULL) == -1) {
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msgq(sp, M_SYSERR, "pty");
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goto err;
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}
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#endif
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/*
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* __TK__ huh?
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* Don't use vfork() here, because the signal semantics differ from
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* implementation to implementation.
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*/
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switch (sc->sh_pid = fork()) {
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case -1: /* Error. */
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msgq(sp, M_SYSERR, "fork");
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err: if (sc->sh_master != -1)
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(void)close(sc->sh_master);
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if (sc->sh_slave != -1)
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(void)close(sc->sh_slave);
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return (1);
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case 0: /* Utility. */
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/*
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* XXX
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* So that shells that do command line editing turn it off.
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*/
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(void)setenv("TERM", "emacs", 1);
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(void)setenv("TERMCAP", "emacs:", 1);
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(void)setenv("EMACS", "t", 1);
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(void)setsid();
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#ifdef TIOCSCTTY
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/*
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* 4.4BSD allocates a controlling terminal using the TIOCSCTTY
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* ioctl, not by opening a terminal device file. POSIX 1003.1
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* doesn't define a portable way to do this. If TIOCSCTTY is
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* not available, hope that the open does it.
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*/
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(void)ioctl(sc->sh_slave, TIOCSCTTY, 0);
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#endif
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(void)close(sc->sh_master);
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(void)dup2(sc->sh_slave, STDIN_FILENO);
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(void)dup2(sc->sh_slave, STDOUT_FILENO);
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(void)dup2(sc->sh_slave, STDERR_FILENO);
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(void)close(sc->sh_slave);
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/* Assumes that all shells have -i. */
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sh_path = O_STR(sp, O_SHELL);
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if ((sh = strrchr(sh_path, '/')) == NULL)
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sh = sh_path;
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else
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++sh;
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execl(sh_path, sh, "-i", NULL);
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msgq_str(sp, M_SYSERR, sh_path, "execl: %s");
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_exit(127);
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default: /* Parent. */
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break;
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}
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if (sscr_getprompt(sp))
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return (1);
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F_SET(sp, SC_SCRIPT);
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F_SET(sp->gp, G_SCRIPT);
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return (0);
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}
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/*
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* sscr_getprompt --
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* Eat lines printed by the shell until a line with no trailing
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* carriage return comes; set the prompt from that line.
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*/
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static int
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sscr_getprompt(sp)
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SCR *sp;
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{
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struct timeval tv;
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CHAR_T *endp, *p, *t, buf[1024];
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SCRIPT *sc;
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fd_set fdset;
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recno_t lline;
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size_t llen, len;
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u_int value;
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int nr;
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FD_ZERO(&fdset);
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endp = buf;
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len = sizeof(buf);
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/* Wait up to a second for characters to read. */
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tv.tv_sec = 5;
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tv.tv_usec = 0;
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sc = sp->script;
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FD_SET(sc->sh_master, &fdset);
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switch (select(sc->sh_master + 1, &fdset, NULL, NULL, &tv)) {
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case -1: /* Error or interrupt. */
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msgq(sp, M_SYSERR, "select");
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goto prompterr;
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case 0: /* Timeout */
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msgq(sp, M_ERR, "Error: timed out");
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goto prompterr;
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case 1: /* Characters to read. */
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break;
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}
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/* Read the characters. */
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more: len = sizeof(buf) - (endp - buf);
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switch (nr = read(sc->sh_master, endp, len)) {
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case 0: /* EOF. */
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msgq(sp, M_ERR, "Error: shell: EOF");
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goto prompterr;
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case -1: /* Error or interrupt. */
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msgq(sp, M_SYSERR, "shell");
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goto prompterr;
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default:
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endp += nr;
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break;
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}
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/* If any complete lines, push them into the file. */
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for (p = t = buf; p < endp; ++p) {
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value = KEY_VAL(sp, *p);
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if (value == K_CR || value == K_NL) {
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if (db_last(sp, &lline) ||
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db_append(sp, 0, lline, t, p - t))
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goto prompterr;
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t = p + 1;
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}
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}
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if (p > buf) {
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memmove(buf, t, endp - t);
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endp = buf + (endp - t);
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}
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if (endp == buf)
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goto more;
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/* Wait up 1/10 of a second to make sure that we got it all. */
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tv.tv_sec = 0;
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tv.tv_usec = 100000;
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switch (select(sc->sh_master + 1, &fdset, NULL, NULL, &tv)) {
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case -1: /* Error or interrupt. */
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msgq(sp, M_SYSERR, "select");
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goto prompterr;
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case 0: /* Timeout */
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break;
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case 1: /* Characters to read. */
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goto more;
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}
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/* Timed out, so theoretically we have a prompt. */
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llen = endp - buf;
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endp = buf;
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/* Append the line into the file. */
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if (db_last(sp, &lline) || db_append(sp, 0, lline, buf, llen)) {
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prompterr: sscr_end(sp);
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return (1);
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}
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return (sscr_setprompt(sp, buf, llen));
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}
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/*
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* sscr_exec --
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* Take a line and hand it off to the shell.
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*
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* PUBLIC: int sscr_exec __P((SCR *, recno_t));
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*/
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int
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sscr_exec(sp, lno)
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SCR *sp;
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recno_t lno;
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{
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SCRIPT *sc;
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recno_t last_lno;
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size_t blen, len, last_len, tlen;
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int isempty, matchprompt, nw, rval;
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char *bp, *p;
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/* If there's a prompt on the last line, append the command. */
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if (db_last(sp, &last_lno))
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return (1);
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if (db_get(sp, last_lno, DBG_FATAL, &p, &last_len))
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return (1);
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if (sscr_matchprompt(sp, p, last_len, &tlen) && tlen == 0) {
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matchprompt = 1;
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GET_SPACE_RET(sp, bp, blen, last_len + 128);
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memmove(bp, p, last_len);
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} else
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matchprompt = 0;
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/* Get something to execute. */
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if (db_eget(sp, lno, &p, &len, &isempty)) {
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if (isempty)
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goto empty;
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goto err1;
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}
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/* Empty lines aren't interesting. */
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if (len == 0)
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goto empty;
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/* Delete any prompt. */
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if (sscr_matchprompt(sp, p, len, &tlen)) {
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if (tlen == len) {
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empty: msgq(sp, M_BERR, "151|No command to execute");
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goto err1;
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}
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p += (len - tlen);
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len = tlen;
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}
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/* Push the line to the shell. */
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sc = sp->script;
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if ((nw = write(sc->sh_master, p, len)) != len)
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goto err2;
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rval = 0;
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if (write(sc->sh_master, "\n", 1) != 1) {
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err2: if (nw == 0)
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errno = EIO;
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msgq(sp, M_SYSERR, "shell");
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goto err1;
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}
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if (matchprompt) {
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ADD_SPACE_RET(sp, bp, blen, last_len + len);
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memmove(bp + last_len, p, len);
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if (db_set(sp, last_lno, bp, last_len + len))
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err1: rval = 1;
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}
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if (matchprompt)
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FREE_SPACE(sp, bp, blen);
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return (rval);
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}
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/*
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* sscr_input --
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* Read any waiting shell input.
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*
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* PUBLIC: int sscr_input __P((SCR *));
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*/
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int
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sscr_input(sp)
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SCR *sp;
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{
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GS *gp;
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struct timeval poll;
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fd_set rdfd;
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int maxfd;
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gp = sp->gp;
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loop: maxfd = 0;
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FD_ZERO(&rdfd);
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poll.tv_sec = 0;
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poll.tv_usec = 0;
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/* Set up the input mask. */
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for (sp = gp->dq.cqh_first; sp != (void *)&gp->dq; sp = sp->q.cqe_next)
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if (F_ISSET(sp, SC_SCRIPT)) {
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FD_SET(sp->script->sh_master, &rdfd);
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if (sp->script->sh_master > maxfd)
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maxfd = sp->script->sh_master;
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}
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/* Check for input. */
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switch (select(maxfd + 1, &rdfd, NULL, NULL, &poll)) {
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case -1:
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msgq(sp, M_SYSERR, "select");
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return (1);
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case 0:
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return (0);
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default:
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break;
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}
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/* Read the input. */
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for (sp = gp->dq.cqh_first; sp != (void *)&gp->dq; sp = sp->q.cqe_next)
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if (F_ISSET(sp, SC_SCRIPT) &&
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FD_ISSET(sp->script->sh_master, &rdfd) && sscr_insert(sp))
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return (1);
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goto loop;
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}
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/*
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* sscr_insert --
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* Take a line from the shell and insert it into the file.
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*/
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static int
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sscr_insert(sp)
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SCR *sp;
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{
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struct timeval tv;
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CHAR_T *endp, *p, *t;
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SCRIPT *sc;
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fd_set rdfd;
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recno_t lno;
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size_t blen, len, tlen;
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u_int value;
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int nr, rval;
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char *bp;
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/* Find out where the end of the file is. */
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if (db_last(sp, &lno))
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return (1);
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#define MINREAD 1024
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GET_SPACE_RET(sp, bp, blen, MINREAD);
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endp = bp;
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/* Read the characters. */
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rval = 1;
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sc = sp->script;
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more: switch (nr = read(sc->sh_master, endp, MINREAD)) {
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case 0: /* EOF; shell just exited. */
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sscr_end(sp);
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rval = 0;
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goto ret;
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case -1: /* Error or interrupt. */
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msgq(sp, M_SYSERR, "shell");
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goto ret;
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default:
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endp += nr;
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break;
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}
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/* Append the lines into the file. */
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for (p = t = bp; p < endp; ++p) {
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value = KEY_VAL(sp, *p);
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if (value == K_CR || value == K_NL) {
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len = p - t;
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if (db_append(sp, 1, lno++, t, len))
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goto ret;
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t = p + 1;
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}
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}
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if (p > t) {
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len = p - t;
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/*
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* If the last thing from the shell isn't another prompt, wait
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* up to 1/10 of a second for more stuff to show up, so that
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* we don't break the output into two separate lines. Don't
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* want to hang indefinitely because some program is hanging,
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* confused the shell, or whatever.
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*/
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if (!sscr_matchprompt(sp, t, len, &tlen) || tlen != 0) {
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tv.tv_sec = 0;
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tv.tv_usec = 100000;
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FD_ZERO(&rdfd);
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FD_SET(sc->sh_master, &rdfd);
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if (select(sc->sh_master + 1,
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&rdfd, NULL, NULL, &tv) == 1) {
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memmove(bp, t, len);
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endp = bp + len;
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goto more;
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}
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}
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if (sscr_setprompt(sp, t, len))
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return (1);
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if (db_append(sp, 1, lno++, t, len))
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goto ret;
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}
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/* The cursor moves to EOF. */
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sp->lno = lno;
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sp->cno = len ? len - 1 : 0;
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rval = vs_refresh(sp, 1);
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ret: FREE_SPACE(sp, bp, blen);
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return (rval);
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}
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/*
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* sscr_setprompt --
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*
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* Set the prompt to the last line we got from the shell.
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*
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*/
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static int
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sscr_setprompt(sp, buf, len)
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SCR *sp;
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char *buf;
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size_t len;
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{
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SCRIPT *sc;
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sc = sp->script;
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if (sc->sh_prompt)
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free(sc->sh_prompt);
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MALLOC(sp, sc->sh_prompt, char *, len + 1);
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if (sc->sh_prompt == NULL) {
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sscr_end(sp);
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return (1);
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}
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memmove(sc->sh_prompt, buf, len);
|
|
sc->sh_prompt_len = len;
|
|
sc->sh_prompt[len] = '\0';
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* sscr_matchprompt --
|
|
* Check to see if a line matches the prompt. Nul's indicate
|
|
* parts that can change, in both content and size.
|
|
*/
|
|
static int
|
|
sscr_matchprompt(sp, lp, line_len, lenp)
|
|
SCR *sp;
|
|
char *lp;
|
|
size_t line_len, *lenp;
|
|
{
|
|
SCRIPT *sc;
|
|
size_t prompt_len;
|
|
char *pp;
|
|
|
|
sc = sp->script;
|
|
if (line_len < (prompt_len = sc->sh_prompt_len))
|
|
return (0);
|
|
|
|
for (pp = sc->sh_prompt;
|
|
prompt_len && line_len; --prompt_len, --line_len) {
|
|
if (*pp == '\0') {
|
|
for (; prompt_len && *pp == '\0'; --prompt_len, ++pp);
|
|
if (!prompt_len)
|
|
return (0);
|
|
for (; line_len && *lp != *pp; --line_len, ++lp);
|
|
if (!line_len)
|
|
return (0);
|
|
}
|
|
if (*pp++ != *lp++)
|
|
break;
|
|
}
|
|
|
|
if (prompt_len)
|
|
return (0);
|
|
if (lenp != NULL)
|
|
*lenp = line_len;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* sscr_end --
|
|
* End the pipe to a shell.
|
|
*
|
|
* PUBLIC: int sscr_end __P((SCR *));
|
|
*/
|
|
int
|
|
sscr_end(sp)
|
|
SCR *sp;
|
|
{
|
|
SCRIPT *sc;
|
|
|
|
if ((sc = sp->script) == NULL)
|
|
return (0);
|
|
|
|
/* Turn off the script flags. */
|
|
F_CLR(sp, SC_SCRIPT);
|
|
sscr_check(sp);
|
|
|
|
/* Close down the parent's file descriptors. */
|
|
if (sc->sh_master != -1)
|
|
(void)close(sc->sh_master);
|
|
if (sc->sh_slave != -1)
|
|
(void)close(sc->sh_slave);
|
|
|
|
/* This should have killed the child. */
|
|
(void)proc_wait(sp, (long)sc->sh_pid, "script-shell", 0, 0);
|
|
|
|
/* Free memory. */
|
|
free(sc->sh_prompt);
|
|
free(sc);
|
|
sp->script = NULL;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* sscr_check --
|
|
* Set/clear the global scripting bit.
|
|
*/
|
|
static void
|
|
sscr_check(sp)
|
|
SCR *sp;
|
|
{
|
|
GS *gp;
|
|
|
|
gp = sp->gp;
|
|
for (sp = gp->dq.cqh_first; sp != (void *)&gp->dq; sp = sp->q.cqe_next)
|
|
if (F_ISSET(sp, SC_SCRIPT)) {
|
|
F_SET(gp, G_SCRIPT);
|
|
return;
|
|
}
|
|
F_CLR(gp, G_SCRIPT);
|
|
}
|
|
|
|
#ifdef HAVE_SYS5_PTY
|
|
static int ptys_open __P((int, char *));
|
|
static int ptym_open __P((char *));
|
|
|
|
static int
|
|
sscr_pty(amaster, aslave, name, termp, winp)
|
|
int *amaster, *aslave;
|
|
char *name;
|
|
struct termios *termp;
|
|
void *winp;
|
|
{
|
|
int master, slave, ttygid;
|
|
|
|
/* open master terminal */
|
|
if ((master = ptym_open(name)) < 0) {
|
|
errno = ENOENT; /* out of ptys */
|
|
return (-1);
|
|
}
|
|
|
|
/* open slave terminal */
|
|
if ((slave = ptys_open(master, name)) >= 0) {
|
|
*amaster = master;
|
|
*aslave = slave;
|
|
} else {
|
|
errno = ENOENT; /* out of ptys */
|
|
return (-1);
|
|
}
|
|
|
|
if (termp)
|
|
(void) tcsetattr(slave, TCSAFLUSH, termp);
|
|
#ifdef TIOCSWINSZ
|
|
if (winp != NULL)
|
|
(void) ioctl(slave, TIOCSWINSZ, (struct winsize *)winp);
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* ptym_open --
|
|
* This function opens a master pty and returns the file descriptor
|
|
* to it. pts_name is also returned which is the name of the slave.
|
|
*/
|
|
static int
|
|
ptym_open(pts_name)
|
|
char *pts_name;
|
|
{
|
|
int fdm;
|
|
char *ptr, *ptsname();
|
|
|
|
strcpy(pts_name, _PATH_SYSV_PTY);
|
|
if ((fdm = open(pts_name, O_RDWR)) < 0 )
|
|
return (-1);
|
|
|
|
if (grantpt(fdm) < 0) {
|
|
close(fdm);
|
|
return (-2);
|
|
}
|
|
|
|
if (unlockpt(fdm) < 0) {
|
|
close(fdm);
|
|
return (-3);
|
|
}
|
|
|
|
if (unlockpt(fdm) < 0) {
|
|
close(fdm);
|
|
return (-3);
|
|
}
|
|
|
|
/* get slave's name */
|
|
if ((ptr = ptsname(fdm)) == NULL) {
|
|
close(fdm);
|
|
return (-3);
|
|
}
|
|
strcpy(pts_name, ptr);
|
|
return (fdm);
|
|
}
|
|
|
|
/*
|
|
* ptys_open --
|
|
* This function opens the slave pty.
|
|
*/
|
|
static int
|
|
ptys_open(fdm, pts_name)
|
|
int fdm;
|
|
char *pts_name;
|
|
{
|
|
int fds;
|
|
|
|
if ((fds = open(pts_name, O_RDWR)) < 0) {
|
|
close(fdm);
|
|
return (-5);
|
|
}
|
|
|
|
if (ioctl(fds, I_PUSH, "ptem") < 0) {
|
|
close(fds);
|
|
close(fdm);
|
|
return (-6);
|
|
}
|
|
|
|
if (ioctl(fds, I_PUSH, "ldterm") < 0) {
|
|
close(fds);
|
|
close(fdm);
|
|
return (-7);
|
|
}
|
|
|
|
if (ioctl(fds, I_PUSH, "ttcompat") < 0) {
|
|
close(fds);
|
|
close(fdm);
|
|
return (-8);
|
|
}
|
|
|
|
return (fds);
|
|
}
|
|
|
|
#else /* !HAVE_SYS5_PTY */
|
|
|
|
static int
|
|
sscr_pty(amaster, aslave, name, termp, winp)
|
|
int *amaster, *aslave;
|
|
char *name;
|
|
struct termios *termp;
|
|
void *winp;
|
|
{
|
|
static char line[] = "/dev/ptyXX";
|
|
register char *cp1, *cp2;
|
|
register int master, slave, ttygid;
|
|
struct group *gr;
|
|
|
|
if ((gr = getgrnam("tty")) != NULL)
|
|
ttygid = gr->gr_gid;
|
|
else
|
|
ttygid = -1;
|
|
|
|
for (cp1 = "pqrs"; *cp1; cp1++) {
|
|
line[8] = *cp1;
|
|
for (cp2 = "0123456789abcdef"; *cp2; cp2++) {
|
|
line[5] = 'p';
|
|
line[9] = *cp2;
|
|
if ((master = open(line, O_RDWR, 0)) == -1) {
|
|
if (errno == ENOENT)
|
|
return (-1); /* out of ptys */
|
|
} else {
|
|
line[5] = 't';
|
|
(void) chown(line, getuid(), ttygid);
|
|
(void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
|
|
#ifdef HAVE_REVOKE
|
|
(void) revoke(line);
|
|
#endif
|
|
if ((slave = open(line, O_RDWR, 0)) != -1) {
|
|
*amaster = master;
|
|
*aslave = slave;
|
|
if (name)
|
|
strcpy(name, line);
|
|
if (termp)
|
|
(void) tcsetattr(slave,
|
|
TCSAFLUSH, termp);
|
|
#ifdef TIOCSWINSZ
|
|
if (winp)
|
|
(void) ioctl(slave, TIOCSWINSZ,
|
|
(char *)winp);
|
|
#endif
|
|
return (0);
|
|
}
|
|
(void) close(master);
|
|
}
|
|
}
|
|
}
|
|
errno = ENOENT; /* out of ptys */
|
|
return (-1);
|
|
}
|
|
#endif /* HAVE_SYS5_PTY */
|