942 lines
18 KiB
C
942 lines
18 KiB
C
/* $NetBSD: cmds.c,v 1.13 1998/12/19 22:59:21 christos Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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#if 0
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static char sccsid[] = "@(#)cmds.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: cmds.c,v 1.13 1998/12/19 22:59:21 christos Exp $");
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#endif /* not lint */
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#include "tip.h"
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#include "pathnames.h"
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/*
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* tip
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*
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* miscellaneous commands
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*/
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int quant[] = { 60, 60, 24 };
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char null = '\0';
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char *sep[] = { "second", "minute", "hour" };
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static char *argv[10]; /* argument vector for take and put */
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int args __P((char *, char **));
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int anyof __P((char *, char *));
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void execute __P((char *));
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void intcopy __P((int));
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void prtime __P((char *, time_t));
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void stopsnd __P((int));
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void transfer __P((char *, int, char *));
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void transmit __P((FILE *, char *, char *));
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/*
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* FTP - remote ==> local
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* get a file from the remote host
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*/
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void
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getfl(c)
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char c;
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{
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char buf[256], *cp;
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putchar(c);
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/*
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* get the UNIX receiving file's name
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*/
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if (prompt("Local file name? ", copyname, sizeof copyname))
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return;
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cp = expand(copyname);
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if ((sfd = open(cp, O_CREAT, 0666)) < 0) {
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printf("\r\n%s: cannot create\r\n", copyname);
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return;
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}
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/*
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* collect parameters
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*/
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if (prompt("List command for remote system? ", buf,
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sizeof buf)) {
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unlink(copyname);
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return;
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}
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transfer(buf, sfd, value(EOFREAD));
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}
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/*
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* Cu-like take command
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*/
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void
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cu_take(cc)
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char cc;
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{
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int fd, argc;
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char line[BUFSIZ], *cp;
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if (prompt("[take] ", copyname, sizeof copyname))
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return;
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if ((argc = args(copyname, argv)) < 1 || argc > 2) {
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printf("usage: <take> from [to]\r\n");
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return;
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}
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if (argc == 1)
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argv[1] = argv[0];
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cp = expand(argv[1]);
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if ((fd = open(cp, O_CREAT, 0666)) < 0) {
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printf("\r\n%s: cannot create\r\n", argv[1]);
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return;
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}
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(void)snprintf(line, sizeof line, "cat %s;echo \01", argv[0]);
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transfer(line, fd, "\01");
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}
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static jmp_buf intbuf;
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/*
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* Bulk transfer routine --
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* used by getfl(), cu_take(), and pipefile()
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*/
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void
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transfer(buf, fd, eofchars)
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char *buf;
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int fd;
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char *eofchars;
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{
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int ct;
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char c, buffer[BUFSIZ];
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char *p = buffer;
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int cnt, eof;
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time_t start;
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sig_t f;
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char r;
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#if __GNUC__ /* XXX pacify gcc */
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(void)&p;
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#endif
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xpwrite(FD, buf, strlen(buf));
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quit = 0;
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kill(pid, SIGIOT);
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read(repdes[0], (char *)&ccc, 1); /* Wait until read process stops */
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/*
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* finish command
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*/
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r = '\r';
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xpwrite(FD, &r, 1);
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do
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read(FD, &c, 1);
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while ((c&STRIP_PAR) != '\n');
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tcsetattr(0, TCSAFLUSH, &defchars);
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(void) setjmp(intbuf);
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f = signal(SIGINT, intcopy);
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start = time(0);
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for (ct = 0; !quit;) {
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eof = read(FD, &c, 1) <= 0;
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c &= STRIP_PAR;
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if (quit)
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continue;
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if (eof || any(c, eofchars))
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break;
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if (c == 0)
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continue; /* ignore nulls */
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if (c == '\r')
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continue;
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*p++ = c;
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if (c == '\n' && boolean(value(VERBOSE)))
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printf("\r%d", ++ct);
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if ((cnt = (p-buffer)) == number(value(FRAMESIZE))) {
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if (write(fd, buffer, cnt) != cnt) {
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printf("\r\nwrite error\r\n");
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quit = 1;
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}
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p = buffer;
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}
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}
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if ((cnt = (p-buffer)) != 0)
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if (write(fd, buffer, cnt) != cnt)
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printf("\r\nwrite error\r\n");
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if (boolean(value(VERBOSE)))
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prtime(" lines transferred in ", time(0)-start);
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tcsetattr(0, TCSAFLUSH, &term);
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write(fildes[1], (char *)&ccc, 1);
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signal(SIGINT, f);
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close(fd);
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}
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/*
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* FTP - remote ==> local process
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* send remote input to local process via pipe
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*/
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void
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pipefile(dummy)
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char dummy;
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{
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int cpid, pdes[2];
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char buf[256];
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int status, p;
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if (prompt("Local command? ", buf, sizeof buf))
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return;
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if (pipe(pdes)) {
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printf("can't establish pipe\r\n");
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return;
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}
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if ((cpid = fork()) < 0) {
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printf("can't fork!\r\n");
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return;
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} else if (cpid) {
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if (prompt("List command for remote system? ", buf,
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sizeof buf)) {
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close(pdes[0]), close(pdes[1]);
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kill (cpid, SIGKILL);
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} else {
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close(pdes[0]);
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signal(SIGPIPE, intcopy);
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transfer(buf, pdes[1], value(EOFREAD));
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signal(SIGPIPE, SIG_DFL);
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while ((p = wait(&status)) > 0 && p != cpid)
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;
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}
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} else {
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int f;
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dup2(pdes[0], 0);
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close(pdes[0]);
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for (f = 3; f < 20; f++)
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close(f);
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execute(buf);
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printf("can't execl!\r\n");
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exit(0);
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}
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}
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/*
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* Interrupt service routine for FTP
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*/
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void
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stopsnd(dummy)
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int dummy;
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{
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stop = 1;
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signal(SIGINT, SIG_IGN);
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}
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/*
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* FTP - local ==> remote
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* send local file to remote host
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* terminate transmission with pseudo EOF sequence
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*/
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void
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sendfile(cc)
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char cc;
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{
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FILE *fd;
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char *fnamex;
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putchar(cc);
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/*
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* get file name
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*/
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if (prompt("Local file name? ", fname, sizeof fname))
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return;
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/*
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* look up file
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*/
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fnamex = expand(fname);
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if ((fd = fopen(fnamex, "r")) == NULL) {
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printf("%s: cannot open\r\n", fname);
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return;
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}
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transmit(fd, value(EOFWRITE), NULL);
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if (!boolean(value(ECHOCHECK)))
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tcdrain(FD);
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}
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/*
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* Bulk transfer routine to remote host --
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* used by sendfile() and cu_put()
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*/
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void
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transmit(fd, eofchars, command)
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FILE *fd;
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char *eofchars, *command;
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{
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char *pc, lastc;
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int c, ccount, lcount;
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time_t start_t, stop_t;
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sig_t f;
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kill(pid, SIGIOT); /* put TIPOUT into a wait state */
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stop = 0;
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f = signal(SIGINT, stopsnd);
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tcsetattr(0, TCSAFLUSH, &defchars);
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read(repdes[0], (char *)&ccc, 1);
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if (command != NULL) {
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for (pc = command; *pc; pc++)
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send(*pc);
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if (boolean(value(ECHOCHECK)))
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read(FD, (char *)&c, 1); /* trailing \n */
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else {
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tcdrain(FD);
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sleep(5); /* wait for remote stty to take effect */
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}
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}
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lcount = 0;
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lastc = '\0';
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start_t = time(0);
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while (1) {
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ccount = 0;
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do {
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c = getc(fd);
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if (stop)
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goto out;
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if (c == EOF)
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goto out;
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if (c == 0177 && !boolean(value(RAWFTP)))
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continue;
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lastc = c;
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if (c < 040) {
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if (c == '\n') {
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if (!boolean(value(RAWFTP)))
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c = '\r';
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}
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else if (c == '\t') {
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if (!boolean(value(RAWFTP))) {
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if (boolean(value(TABEXPAND))) {
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send(' ');
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while ((++ccount % 8) != 0)
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send(' ');
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continue;
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}
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}
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} else
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if (!boolean(value(RAWFTP)))
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continue;
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}
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send(c);
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} while (c != '\r' && !boolean(value(RAWFTP)));
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if (boolean(value(VERBOSE)))
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printf("\r%d", ++lcount);
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if (boolean(value(ECHOCHECK))) {
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timedout = 0;
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alarm((long)value(ETIMEOUT));
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do { /* wait for prompt */
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read(FD, (char *)&c, 1);
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if (timedout || stop) {
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if (timedout)
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printf(
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"\r\ntimed out at eol\r\n");
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alarm(0);
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goto out;
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}
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} while ((c&STRIP_PAR) != character(value(PROMPT)));
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alarm(0);
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}
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}
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out:
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if (lastc != '\n' && !boolean(value(RAWFTP)))
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send('\r');
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if (eofchars) {
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for (pc = eofchars; *pc; pc++)
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send(*pc);
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}
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stop_t = time(0);
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fclose(fd);
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signal(SIGINT, f);
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if (boolean(value(VERBOSE))) {
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if (boolean(value(RAWFTP)))
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prtime(" chars transferred in ", stop_t-start_t);
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else
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prtime(" lines transferred in ", stop_t-start_t);
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}
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write(fildes[1], (char *)&ccc, 1);
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tcsetattr(0, TCSAFLUSH, &term);
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}
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/*
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* Cu-like put command
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*/
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void
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cu_put(cc)
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char cc;
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{
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FILE *fd;
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char line[BUFSIZ];
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int argc;
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char *copynamex;
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if (prompt("[put] ", copyname, sizeof copyname))
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return;
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if ((argc = args(copyname, argv)) < 1 || argc > 2) {
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printf("usage: <put> from [to]\r\n");
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return;
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}
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if (argc == 1)
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argv[1] = argv[0];
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copynamex = expand(argv[0]);
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if ((fd = fopen(copynamex, "r")) == NULL) {
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printf("%s: cannot open\r\n", copynamex);
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return;
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}
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if (boolean(value(ECHOCHECK)))
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(void)snprintf(line, sizeof line, "cat>%s\r", argv[1]);
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else
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(void)snprintf(line, sizeof line, "stty -echo;cat>%s;stty echo\r", argv[1]);
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transmit(fd, "\04", line);
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}
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/*
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* FTP - send single character
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* wait for echo & handle timeout
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*/
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void
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send(c)
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char c;
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{
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char cc;
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int retry = 0;
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cc = c;
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xpwrite(FD, &cc, 1);
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#ifdef notdef
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if (number(value(CDELAY)) > 0 && c != '\r')
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nap(number(value(CDELAY)));
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#endif
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if (!boolean(value(ECHOCHECK))) {
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#ifdef notdef
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if (number(value(LDELAY)) > 0 && c == '\r')
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nap(number(value(LDELAY)));
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#endif
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return;
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}
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tryagain:
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timedout = 0;
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alarm((long)value(ETIMEOUT));
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read(FD, &cc, 1);
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alarm(0);
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if (timedout) {
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printf("\r\ntimeout error (%s)\r\n", ctrl(c));
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if (retry++ > 3)
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return;
|
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xpwrite(FD, &null, 1); /* poke it */
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goto tryagain;
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}
|
|
}
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|
|
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void
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alrmtimeout(dummy)
|
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int dummy;
|
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{
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|
|
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signal(SIGALRM, alrmtimeout);
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timedout = 1;
|
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}
|
|
|
|
/*
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* Stolen from consh() -- puts a remote file on the output of a local command.
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* Identical to consh() except for where stdout goes.
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*/
|
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void
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pipeout(c)
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char c;
|
|
{
|
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char buf[256];
|
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int cpid, status, p;
|
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time_t start = 0;
|
|
|
|
putchar(c);
|
|
if (prompt("Local command? ", buf, sizeof buf))
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return;
|
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kill(pid, SIGIOT); /* put TIPOUT into a wait state */
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signal(SIGINT, SIG_IGN);
|
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signal(SIGQUIT, SIG_IGN);
|
|
tcsetattr(0, TCSAFLUSH, &defchars);
|
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read(repdes[0], (char *)&ccc, 1);
|
|
/*
|
|
* Set up file descriptors in the child and
|
|
* let it go...
|
|
*/
|
|
if ((cpid = fork()) < 0)
|
|
printf("can't fork!\r\n");
|
|
else if (cpid) {
|
|
start = time(0);
|
|
while ((p = wait(&status)) > 0 && p != cpid)
|
|
;
|
|
} else {
|
|
int i;
|
|
|
|
dup2(FD, 1);
|
|
for (i = 3; i < 20; i++)
|
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close(i);
|
|
signal(SIGINT, SIG_DFL);
|
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signal(SIGQUIT, SIG_DFL);
|
|
execute(buf);
|
|
printf("can't find `%s'\r\n", buf);
|
|
exit(0);
|
|
}
|
|
if (boolean(value(VERBOSE)))
|
|
prtime("away for ", time(0)-start);
|
|
write(fildes[1], (char *)&ccc, 1);
|
|
tcsetattr(0, TCSAFLUSH, &term);
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
}
|
|
|
|
#ifdef CONNECT
|
|
/*
|
|
* Fork a program with:
|
|
* 0 <-> remote tty in
|
|
* 1 <-> remote tty out
|
|
* 2 <-> local tty out
|
|
*/
|
|
void
|
|
consh(c)
|
|
char c;
|
|
{
|
|
char buf[256];
|
|
int cpid, status, p;
|
|
time_t start = 0;
|
|
|
|
putchar(c);
|
|
if (prompt("Local command? ", buf, sizeof buf))
|
|
return;
|
|
kill(pid, SIGIOT); /* put TIPOUT into a wait state */
|
|
signal(SIGINT, SIG_IGN);
|
|
signal(SIGQUIT, SIG_IGN);
|
|
tcsetattr(0, TCSAFLUSH, &defchars);
|
|
read(repdes[0], (char *)&ccc, 1);
|
|
/*
|
|
* Set up file descriptors in the child and
|
|
* let it go...
|
|
*/
|
|
if ((cpid = fork()) < 0)
|
|
printf("can't fork!\r\n");
|
|
else if (cpid) {
|
|
start = time(0);
|
|
while ((p = wait(&status)) > 0 && p != cpid)
|
|
;
|
|
} else {
|
|
int i;
|
|
|
|
dup2(FD, 0);
|
|
dup2(3, 1);
|
|
for (i = 3; i < 20; i++)
|
|
close(i);
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
execute(buf);
|
|
printf("can't find `%s'\r\n", buf);
|
|
exit(0);
|
|
}
|
|
if (boolean(value(VERBOSE)))
|
|
prtime("away for ", time(0)-start);
|
|
write(fildes[1], (char *)&ccc, 1);
|
|
tcsetattr(0, TCSAFLUSH, &term);
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Escape to local shell
|
|
*/
|
|
void
|
|
shell(dummy)
|
|
char dummy;
|
|
{
|
|
int shpid, status;
|
|
char *cp;
|
|
|
|
printf("[sh]\r\n");
|
|
signal(SIGINT, SIG_IGN);
|
|
signal(SIGQUIT, SIG_IGN);
|
|
unraw();
|
|
switch (shpid = fork()) {
|
|
default:
|
|
while (shpid != wait(&status));
|
|
raw();
|
|
printf("\r\n!\r\n");
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
break;
|
|
case 0:
|
|
signal(SIGQUIT, SIG_DFL);
|
|
signal(SIGINT, SIG_DFL);
|
|
if ((cp = strrchr(value(SHELL), '/')) == NULL)
|
|
cp = value(SHELL);
|
|
else
|
|
cp++;
|
|
shell_uid();
|
|
execl(value(SHELL), cp, 0);
|
|
fprintf(stderr, "\r\n");
|
|
err(1, "can't execl");
|
|
/* NOTREACHED */
|
|
case -1:
|
|
fprintf(stderr, "\r\n");
|
|
err(1, "can't fork");
|
|
/* NOTREACHED */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* TIPIN portion of scripting
|
|
* initiate the conversation with TIPOUT
|
|
*/
|
|
void
|
|
setscript()
|
|
{
|
|
char c;
|
|
/*
|
|
* enable TIPOUT side for dialogue
|
|
*/
|
|
kill(pid, SIGEMT);
|
|
if (boolean(value(SCRIPT)) && strlen(value(RECORD)))
|
|
write(fildes[1], value(RECORD), strlen(value(RECORD)));
|
|
write(fildes[1], "\n", 1);
|
|
/*
|
|
* wait for TIPOUT to finish
|
|
*/
|
|
read(repdes[0], &c, 1);
|
|
if (c == 'n')
|
|
printf("can't create %s\r\n", value(RECORD));
|
|
}
|
|
|
|
/*
|
|
* Change current working directory of
|
|
* local portion of tip
|
|
*/
|
|
void
|
|
chdirectory(dummy)
|
|
char dummy;
|
|
{
|
|
char dirname[80];
|
|
char *cp = dirname;
|
|
|
|
if (prompt("[cd] ", dirname, sizeof dirname)) {
|
|
if (stoprompt)
|
|
return;
|
|
cp = value(HOME);
|
|
}
|
|
if (chdir(cp) < 0)
|
|
printf("%s: bad directory\r\n", cp);
|
|
printf("!\r\n");
|
|
}
|
|
|
|
void
|
|
tipabort(msg)
|
|
char *msg;
|
|
{
|
|
|
|
kill(pid, SIGTERM);
|
|
disconnect(msg);
|
|
if (msg != NULL)
|
|
printf("\r\n%s", msg);
|
|
printf("\r\n[EOT]\r\n");
|
|
daemon_uid();
|
|
(void)uu_unlock(uucplock);
|
|
unraw();
|
|
exit(0);
|
|
}
|
|
|
|
void
|
|
finish(dummy)
|
|
char dummy;
|
|
{
|
|
char *dismsg;
|
|
|
|
dismsg = value(DISCONNECT);
|
|
if (dismsg != NULL && dismsg[0] != '\0') {
|
|
write(FD, dismsg, strlen(dismsg));
|
|
sleep(5);
|
|
}
|
|
tipabort(NULL);
|
|
}
|
|
|
|
void
|
|
intcopy(dummy)
|
|
int dummy;
|
|
{
|
|
|
|
raw();
|
|
quit = 1;
|
|
longjmp(intbuf, 1);
|
|
}
|
|
|
|
void
|
|
execute(s)
|
|
char *s;
|
|
{
|
|
char *cp;
|
|
|
|
if ((cp = strrchr(value(SHELL), '/')) == NULL)
|
|
cp = value(SHELL);
|
|
else
|
|
cp++;
|
|
shell_uid();
|
|
execl(value(SHELL), cp, "-c", s, 0);
|
|
}
|
|
|
|
int
|
|
args(buf, a)
|
|
char *buf, *a[];
|
|
{
|
|
char *p = buf, *start;
|
|
char **parg = a;
|
|
int n = 0;
|
|
|
|
do {
|
|
while (*p && (*p == ' ' || *p == '\t'))
|
|
p++;
|
|
start = p;
|
|
if (*p)
|
|
*parg = p;
|
|
while (*p && (*p != ' ' && *p != '\t'))
|
|
p++;
|
|
if (p != start)
|
|
parg++, n++;
|
|
if (*p)
|
|
*p++ = '\0';
|
|
} while (*p);
|
|
|
|
return(n);
|
|
}
|
|
|
|
void
|
|
prtime(s, a)
|
|
char *s;
|
|
time_t a;
|
|
{
|
|
int i;
|
|
int nums[3];
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
nums[i] = (int)(a % quant[i]);
|
|
a /= quant[i];
|
|
}
|
|
printf("%s", s);
|
|
while (--i >= 0)
|
|
if (nums[i] || (i == 0 && nums[1] == 0 && nums[2] == 0))
|
|
printf("%d %s%c ", nums[i], sep[i],
|
|
nums[i] == 1 ? '\0' : 's');
|
|
printf("\r\n!\r\n");
|
|
}
|
|
|
|
void
|
|
variable(dummy)
|
|
char dummy;
|
|
{
|
|
char buf[256];
|
|
|
|
if (prompt("[set] ", buf, sizeof buf))
|
|
return;
|
|
vlex(buf);
|
|
if (vtable[BEAUTIFY].v_access&CHANGED) {
|
|
vtable[BEAUTIFY].v_access &= ~CHANGED;
|
|
kill(pid, SIGSYS);
|
|
}
|
|
if (vtable[SCRIPT].v_access&CHANGED) {
|
|
vtable[SCRIPT].v_access &= ~CHANGED;
|
|
setscript();
|
|
/*
|
|
* So that "set record=blah script" doesn't
|
|
* cause two transactions to occur.
|
|
*/
|
|
if (vtable[RECORD].v_access&CHANGED)
|
|
vtable[RECORD].v_access &= ~CHANGED;
|
|
}
|
|
if (vtable[RECORD].v_access&CHANGED) {
|
|
vtable[RECORD].v_access &= ~CHANGED;
|
|
if (boolean(value(SCRIPT)))
|
|
setscript();
|
|
}
|
|
if (vtable[TAND].v_access&CHANGED) {
|
|
vtable[TAND].v_access &= ~CHANGED;
|
|
if (boolean(value(TAND)))
|
|
tandem("on");
|
|
else
|
|
tandem("off");
|
|
}
|
|
if (vtable[LECHO].v_access&CHANGED) {
|
|
vtable[LECHO].v_access &= ~CHANGED;
|
|
HD = boolean(value(LECHO));
|
|
}
|
|
if (vtable[PARITY].v_access&CHANGED) {
|
|
vtable[PARITY].v_access &= ~CHANGED;
|
|
setparity(NULL); /* XXX what is the correct arg? */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Turn tandem mode on or off for remote tty.
|
|
*/
|
|
void
|
|
tandem(option)
|
|
char *option;
|
|
{
|
|
struct termios rmtty;
|
|
|
|
tcgetattr(FD, &rmtty);
|
|
if (strcmp(option, "on") == 0) {
|
|
rmtty.c_iflag |= IXOFF;
|
|
term.c_iflag |= IXOFF;
|
|
} else {
|
|
rmtty.c_iflag &= ~IXOFF;
|
|
term.c_iflag &= ~IXOFF;
|
|
}
|
|
tcsetattr(FD, TCSADRAIN, &rmtty);
|
|
tcsetattr(0, TCSADRAIN, &term);
|
|
}
|
|
|
|
/*
|
|
* Send a break.
|
|
*/
|
|
void
|
|
genbrk(dummy)
|
|
char dummy;
|
|
{
|
|
|
|
ioctl(FD, TIOCSBRK, NULL);
|
|
sleep(1);
|
|
ioctl(FD, TIOCCBRK, NULL);
|
|
}
|
|
|
|
/*
|
|
* Suspend tip
|
|
*/
|
|
void
|
|
suspend(c)
|
|
char c;
|
|
{
|
|
|
|
unraw();
|
|
kill(c == CTRL('y') ? getpid() : 0, SIGTSTP);
|
|
raw();
|
|
}
|
|
|
|
/*
|
|
* expand a file name if it includes shell meta characters
|
|
*/
|
|
|
|
char *
|
|
expand(name)
|
|
char name[];
|
|
{
|
|
static char xname[BUFSIZ];
|
|
char cmdbuf[BUFSIZ];
|
|
int pid, l;
|
|
char *cp, *Shell;
|
|
int s, pivec[2];
|
|
|
|
if (!anyof(name, "~{[*?$`'\"\\"))
|
|
return(name);
|
|
if (pipe(pivec) < 0) {
|
|
perror("pipe");
|
|
return(name);
|
|
}
|
|
(void)snprintf(cmdbuf, sizeof cmdbuf, "echo %s", name);
|
|
if ((pid = vfork()) == 0) {
|
|
Shell = value(SHELL);
|
|
if (Shell == NULL)
|
|
Shell = _PATH_BSHELL;
|
|
close(pivec[0]);
|
|
close(1);
|
|
dup(pivec[1]);
|
|
close(pivec[1]);
|
|
close(2);
|
|
shell_uid();
|
|
execl(Shell, Shell, "-c", cmdbuf, 0);
|
|
_exit(1);
|
|
}
|
|
if (pid == -1) {
|
|
perror("fork");
|
|
close(pivec[0]);
|
|
close(pivec[1]);
|
|
return(NULL);
|
|
}
|
|
close(pivec[1]);
|
|
l = read(pivec[0], xname, BUFSIZ);
|
|
close(pivec[0]);
|
|
while (wait(&s) != pid);
|
|
;
|
|
s &= 0377;
|
|
if (s != 0 && s != SIGPIPE) {
|
|
fprintf(stderr, "\"Echo\" failed\n");
|
|
return(NULL);
|
|
}
|
|
if (l < 0) {
|
|
perror("read");
|
|
return(NULL);
|
|
}
|
|
if (l == 0) {
|
|
fprintf(stderr, "\"%s\": No match\n", name);
|
|
return(NULL);
|
|
}
|
|
if (l == BUFSIZ) {
|
|
fprintf(stderr, "Buffer overflow expanding \"%s\"\n", name);
|
|
return(NULL);
|
|
}
|
|
xname[l] = 0;
|
|
for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
|
|
;
|
|
*++cp = '\0';
|
|
return(xname);
|
|
}
|
|
|
|
/*
|
|
* Are any of the characters in the two strings the same?
|
|
*/
|
|
|
|
int
|
|
anyof(s1, s2)
|
|
char *s1, *s2;
|
|
{
|
|
int c;
|
|
|
|
while ((c = *s1++))
|
|
if (any(c, s2))
|
|
return(1);
|
|
return(0);
|
|
}
|