514 lines
9.7 KiB
C
514 lines
9.7 KiB
C
/*
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* Copyright (c) 1985, 1989 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 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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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1985, 1989 Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)main.c 5.18 (Berkeley) 3/1/91";*/
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static char rcsid[] = "$Id: main.c,v 1.2 1993/08/01 18:15:26 mycroft Exp $";
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#endif /* not lint */
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/*
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* FTP User Program -- Command Interface.
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*/
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#include "ftp_var.h"
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <arpa/ftp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <errno.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <pwd.h>
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uid_t getuid();
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void intr(), lostpeer();
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extern char *home;
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char *getlogin();
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main(argc, argv)
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char *argv[];
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{
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register char *cp;
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int top;
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struct passwd *pw = NULL;
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char homedir[MAXPATHLEN];
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sp = getservbyname("ftp", "tcp");
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if (sp == 0) {
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fprintf(stderr, "ftp: ftp/tcp: unknown service\n");
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exit(1);
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}
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doglob = 1;
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interactive = 1;
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autologin = 1;
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argc--, argv++;
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while (argc > 0 && **argv == '-') {
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for (cp = *argv + 1; *cp; cp++)
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switch (*cp) {
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case 'd':
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options |= SO_DEBUG;
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debug++;
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break;
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case 'v':
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verbose++;
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break;
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case 't':
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trace++;
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break;
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case 'i':
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interactive = 0;
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break;
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case 'n':
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autologin = 0;
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break;
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case 'g':
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doglob = 0;
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break;
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default:
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fprintf(stdout,
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"ftp: %c: unknown option\n", *cp);
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exit(1);
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}
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argc--, argv++;
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}
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fromatty = isatty(fileno(stdin));
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if (fromatty)
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verbose++;
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cpend = 0; /* no pending replies */
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proxy = 0; /* proxy not active */
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crflag = 1; /* strip c.r. on ascii gets */
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sendport = -1; /* not using ports */
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/*
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* Set up the home directory in case we're globbing.
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*/
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cp = getlogin();
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if (cp != NULL) {
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pw = getpwnam(cp);
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}
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if (pw == NULL)
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pw = getpwuid(getuid());
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if (pw != NULL) {
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home = homedir;
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(void) strcpy(home, pw->pw_dir);
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}
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if (argc > 0) {
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if (setjmp(toplevel))
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exit(0);
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(void) signal(SIGINT, intr);
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(void) signal(SIGPIPE, lostpeer);
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setpeer(argc + 1, argv - 1);
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}
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top = setjmp(toplevel) == 0;
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if (top) {
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(void) signal(SIGINT, intr);
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(void) signal(SIGPIPE, lostpeer);
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}
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for (;;) {
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cmdscanner(top);
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top = 1;
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}
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}
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void
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intr()
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{
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longjmp(toplevel, 1);
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}
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void
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lostpeer()
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{
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extern FILE *cout;
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extern int data;
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if (connected) {
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if (cout != NULL) {
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(void) shutdown(fileno(cout), 1+1);
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(void) fclose(cout);
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cout = NULL;
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}
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if (data >= 0) {
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(void) shutdown(data, 1+1);
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(void) close(data);
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data = -1;
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}
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connected = 0;
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}
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pswitch(1);
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if (connected) {
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if (cout != NULL) {
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(void) shutdown(fileno(cout), 1+1);
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(void) fclose(cout);
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cout = NULL;
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}
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connected = 0;
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}
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proxflag = 0;
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pswitch(0);
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}
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/*char *
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tail(filename)
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char *filename;
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{
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register char *s;
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while (*filename) {
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s = rindex(filename, '/');
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if (s == NULL)
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break;
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if (s[1])
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return (s + 1);
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*s = '\0';
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}
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return (filename);
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}
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*/
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/*
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* Command parser.
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*/
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cmdscanner(top)
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int top;
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{
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register struct cmd *c;
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register int l;
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struct cmd *getcmd();
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extern int help();
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if (!top)
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(void) putchar('\n');
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for (;;) {
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if (fromatty) {
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printf("ftp> ");
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(void) fflush(stdout);
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}
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if (fgets(line, sizeof line, stdin) == NULL)
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quit();
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l = strlen(line);
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if (l == 0)
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break;
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if (line[--l] == '\n') {
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if (l == 0)
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break;
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line[l] = '\0';
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} else if (l == sizeof(line) - 2) {
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printf("sorry, input line too long\n");
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while ((l = getchar()) != '\n' && l != EOF)
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/* void */;
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break;
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} /* else it was a line without a newline */
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makeargv();
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if (margc == 0) {
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continue;
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}
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c = getcmd(margv[0]);
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if (c == (struct cmd *)-1) {
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printf("?Ambiguous command\n");
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continue;
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}
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if (c == 0) {
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printf("?Invalid command\n");
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continue;
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}
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if (c->c_conn && !connected) {
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printf("Not connected.\n");
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continue;
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}
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(*c->c_handler)(margc, margv);
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if (bell && c->c_bell)
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(void) putchar('\007');
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if (c->c_handler != help)
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break;
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}
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(void) signal(SIGINT, intr);
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(void) signal(SIGPIPE, lostpeer);
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}
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struct cmd *
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getcmd(name)
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register char *name;
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{
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extern struct cmd cmdtab[];
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register char *p, *q;
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register struct cmd *c, *found;
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register int nmatches, longest;
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longest = 0;
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nmatches = 0;
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found = 0;
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for (c = cmdtab; p = c->c_name; c++) {
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for (q = name; *q == *p++; q++)
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if (*q == 0) /* exact match? */
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return (c);
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if (!*q) { /* the name was a prefix */
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if (q - name > longest) {
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longest = q - name;
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nmatches = 1;
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found = c;
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} else if (q - name == longest)
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nmatches++;
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}
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}
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if (nmatches > 1)
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return ((struct cmd *)-1);
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return (found);
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}
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/*
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* Slice a string up into argc/argv.
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*/
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int slrflag;
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makeargv()
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{
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char **argp;
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char *slurpstring();
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margc = 0;
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argp = margv;
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stringbase = line; /* scan from first of buffer */
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argbase = argbuf; /* store from first of buffer */
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slrflag = 0;
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while (*argp++ = slurpstring())
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margc++;
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}
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/*
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* Parse string into argbuf;
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* implemented with FSM to
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* handle quoting and strings
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*/
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char *
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slurpstring()
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{
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int got_one = 0;
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register char *sb = stringbase;
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register char *ap = argbase;
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char *tmp = argbase; /* will return this if token found */
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if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */
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switch (slrflag) { /* and $ as token for macro invoke */
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case 0:
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slrflag++;
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stringbase++;
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return ((*sb == '!') ? "!" : "$");
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/* NOTREACHED */
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case 1:
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slrflag++;
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altarg = stringbase;
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break;
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default:
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break;
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}
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}
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S0:
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switch (*sb) {
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case '\0':
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goto OUT;
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case ' ':
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case '\t':
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sb++; goto S0;
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default:
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switch (slrflag) {
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case 0:
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slrflag++;
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break;
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case 1:
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slrflag++;
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altarg = sb;
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break;
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default:
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break;
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}
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goto S1;
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}
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S1:
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switch (*sb) {
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case ' ':
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case '\t':
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case '\0':
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goto OUT; /* end of token */
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case '\\':
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sb++; goto S2; /* slurp next character */
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case '"':
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sb++; goto S3; /* slurp quoted string */
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default:
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*ap++ = *sb++; /* add character to token */
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got_one = 1;
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goto S1;
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}
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S2:
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switch (*sb) {
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case '\0':
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goto OUT;
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default:
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*ap++ = *sb++;
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got_one = 1;
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goto S1;
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}
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S3:
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switch (*sb) {
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case '\0':
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goto OUT;
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case '"':
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sb++; goto S1;
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default:
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*ap++ = *sb++;
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got_one = 1;
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goto S3;
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}
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OUT:
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if (got_one)
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*ap++ = '\0';
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argbase = ap; /* update storage pointer */
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stringbase = sb; /* update scan pointer */
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if (got_one) {
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return(tmp);
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}
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switch (slrflag) {
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case 0:
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slrflag++;
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break;
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case 1:
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slrflag++;
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altarg = (char *) 0;
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break;
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default:
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break;
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}
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return((char *)0);
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}
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#define HELPINDENT (sizeof ("directory"))
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/*
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* Help command.
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* Call each command handler with argc == 0 and argv[0] == name.
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*/
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help(argc, argv)
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int argc;
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char *argv[];
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{
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extern struct cmd cmdtab[];
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register struct cmd *c;
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if (argc == 1) {
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register int i, j, w, k;
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int columns, width = 0, lines;
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extern int NCMDS;
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printf("Commands may be abbreviated. Commands are:\n\n");
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for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
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int len = strlen(c->c_name);
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if (len > width)
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width = len;
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}
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width = (width + 8) &~ 7;
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columns = 80 / width;
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if (columns == 0)
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columns = 1;
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lines = (NCMDS + columns - 1) / columns;
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for (i = 0; i < lines; i++) {
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for (j = 0; j < columns; j++) {
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c = cmdtab + j * lines + i;
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if (c->c_name && (!proxy || c->c_proxy)) {
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printf("%s", c->c_name);
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}
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else if (c->c_name) {
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for (k=0; k < strlen(c->c_name); k++) {
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(void) putchar(' ');
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}
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}
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if (c + lines >= &cmdtab[NCMDS]) {
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printf("\n");
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break;
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}
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w = strlen(c->c_name);
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while (w < width) {
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w = (w + 8) &~ 7;
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(void) putchar('\t');
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}
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}
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}
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return;
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}
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while (--argc > 0) {
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register char *arg;
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arg = *++argv;
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c = getcmd(arg);
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if (c == (struct cmd *)-1)
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printf("?Ambiguous help command %s\n", arg);
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else if (c == (struct cmd *)0)
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printf("?Invalid help command %s\n", arg);
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else
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printf("%-*s\t%s\n", HELPINDENT,
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c->c_name, c->c_help);
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}
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}
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