/* $OpenBSD: main.c,v 1.58 2004/07/20 03:50:26 deraadt Exp $ */ /* $NetBSD: main.c,v 1.24 1997/08/18 10:20:26 lukem Exp $ */ /* * Copyright (C) 1997 and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1985, 1989, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1985, 1989, 1993, 1994\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #if !defined(lint) && !defined(SMALL) static char rcsid[] = "$OpenBSD: main.c,v 1.58 2004/07/20 03:50:26 deraadt Exp $"; #endif /* not lint and not SMALL */ /* * FTP User Program -- Command Interface. */ #include #include #include #include #include #include #include #include #include #include #include #include "ftp_var.h" int family = PF_UNSPEC; int main(volatile int argc, char *argv[]) { int ch, top, rval; struct passwd *pw = NULL; char *cp, homedir[MAXPATHLEN]; char *outfile = NULL; int dumb_terminal = 0; ftpport = "ftp"; httpport = "http"; gateport = getenv("FTPSERVERPORT"); if (gateport == NULL || *gateport == '\0') gateport = "ftpgate"; doglob = 1; interactive = 1; autologin = 1; passivemode = 1; activefallback = 1; preserve = 1; verbose = 0; progress = 0; gatemode = 0; #ifndef SMALL editing = 0; el = NULL; hist = NULL; #endif mark = HASHBYTES; marg_sl = sl_init(); #ifdef INET6 epsv4 = 1; #else epsv4 = 0; #endif epsv4bad = 0; /* Set default operation mode based on FTPMODE environment variable */ if ((cp = getenv("FTPMODE")) != NULL && *cp != '\0') { if (strcmp(cp, "passive") == 0) { passivemode = 1; activefallback = 0; } else if (strcmp(cp, "active") == 0) { passivemode = 0; activefallback = 0; } else if (strcmp(cp, "gate") == 0) { gatemode = 1; } else if (strcmp(cp, "auto") == 0) { passivemode = 1; activefallback = 1; } else warnx("unknown FTPMODE: %s. Using defaults", cp); } if (strcmp(__progname, "gate-ftp") == 0) gatemode = 1; gateserver = getenv("FTPSERVER"); if (gateserver == NULL || *gateserver == '\0') gateserver = GATE_SERVER; if (gatemode) { if (*gateserver == '\0') { warnx( "Neither $FTPSERVER nor $GATE_SERVER is defined; disabling gate-ftp"); gatemode = 0; } } cp = getenv("TERM"); dumb_terminal = (cp == NULL || *cp == '\0' || !strcmp(cp, "dumb") || !strcmp(cp, "emacs") || !strcmp(cp, "su")); fromatty = isatty(fileno(stdin)); if (fromatty) { verbose = 1; /* verbose if from a tty */ #ifndef SMALL if (!dumb_terminal) editing = 1; /* editing mode on if tty is usable */ #endif } ttyout = stdout; if (isatty(fileno(ttyout)) && !dumb_terminal && foregroundproc()) progress = 1; /* progress bar on if tty is usable */ while ((ch = getopt(argc, argv, "46Aadegimno:pP:r:tvV")) != -1) { switch (ch) { case '4': family = PF_INET; break; case '6': family = PF_INET6; break; case 'A': activefallback = 0; passivemode = 0; break; case 'a': anonftp = 1; break; case 'd': options |= SO_DEBUG; debug++; break; case 'e': #ifndef SMALL editing = 0; #endif break; case 'g': doglob = 0; break; case 'i': interactive = 0; break; case 'm': progress = -1; break; case 'n': autologin = 0; break; case 'o': outfile = optarg; if (strcmp(outfile, "-") == 0) ttyout = stderr; break; case 'p': passivemode = 1; activefallback = 0; break; case 'P': ftpport = optarg; break; case 'r': if (isdigit(*optarg)) retry_connect = atoi(optarg); else errx(1, "-r requires numeric argument"); break; case 't': trace = 1; break; case 'v': verbose = 1; break; case 'V': verbose = 0; break; default: usage(); } } argc -= optind; argv += optind; cpend = 0; /* no pending replies */ proxy = 0; /* proxy not active */ crflag = 1; /* strip c.r. on ascii gets */ sendport = -1; /* not using ports */ /* * Set up the home directory in case we're globbing. */ cp = getlogin(); if (cp != NULL) { pw = getpwnam(cp); } if (pw == NULL) pw = getpwuid(getuid()); if (pw != NULL) { (void)strlcpy(homedir, pw->pw_dir, sizeof homedir); home = homedir; } setttywidth(0); (void)signal(SIGWINCH, setttywidth); if (argc > 0) { if (isurl(argv[0])) { anonftp = 1; /* Handle "automatic" transfers. */ rval = auto_fetch(argc, argv, outfile); if (rval >= 0) /* -1 == connected and cd-ed */ exit(rval); } else { char *xargv[5]; if (setjmp(toplevel)) exit(0); (void)signal(SIGINT, (sig_t)intr); (void)signal(SIGPIPE, (sig_t)lostpeer); xargv[0] = __progname; xargv[1] = argv[0]; xargv[2] = argv[1]; xargv[3] = argv[2]; xargv[4] = NULL; do { setpeer(argc+1, xargv); if (!retry_connect) break; if (!connected) { macnum = 0; fputs("Retrying...\n", ttyout); sleep(retry_connect); } } while (!connected); retry_connect = 0; /* connected, stop hiding msgs */ } } #ifndef SMALL controlediting(); #endif /* !SMALL */ top = setjmp(toplevel) == 0; if (top) { (void)signal(SIGINT, (sig_t)intr); (void)signal(SIGPIPE, (sig_t)lostpeer); } for (;;) { cmdscanner(top); top = 1; } } void intr(void) { alarmtimer(0); longjmp(toplevel, 1); } void lostpeer(void) { int save_errno = errno; alarmtimer(0); if (connected) { if (cout != NULL) { (void)shutdown(fileno(cout), 1+1); (void)fclose(cout); cout = NULL; } if (data >= 0) { (void)shutdown(data, 1+1); (void)close(data); data = -1; } connected = 0; } pswitch(1); if (connected) { if (cout != NULL) { (void)shutdown(fileno(cout), 1+1); (void)fclose(cout); cout = NULL; } connected = 0; } proxflag = 0; pswitch(0); errno = save_errno; } /* * Generate a prompt */ char * prompt(void) { return ("ftp> "); } /* * Command parser. */ void cmdscanner(int top) { struct cmd *c; int num; #ifndef SMALL HistEvent hev; #endif if (!top #ifndef SMALL && !editing #endif /* !SMALL */ ) (void)putc('\n', ttyout); for (;;) { #ifndef SMALL if (!editing) { #endif /* !SMALL */ if (fromatty) { fputs(prompt(), ttyout); (void)fflush(ttyout); } if (fgets(line, sizeof(line), stdin) == NULL) quit(0, 0); num = strlen(line); if (num == 0) break; if (line[--num] == '\n') { if (num == 0) break; line[num] = '\0'; } else if (num == sizeof(line) - 2) { fputs("sorry, input line too long.\n", ttyout); while ((num = getchar()) != '\n' && num != EOF) /* void */; break; } /* else it was a line without a newline */ #ifndef SMALL } else { const char *buf; cursor_pos = NULL; if ((buf = el_gets(el, &num)) == NULL || num == 0) quit(0, 0); if (buf[--num] == '\n') { if (num == 0) break; } if (num >= sizeof(line)) { fputs("sorry, input line too long.\n", ttyout); break; } memcpy(line, buf, (size_t)num); line[num] = '\0'; history(hist, &hev, H_ENTER, buf); } #endif /* !SMALL */ makeargv(); if (margc == 0) continue; c = getcmd(margv[0]); if (c == (struct cmd *)-1) { fputs("?Ambiguous command.\n", ttyout); continue; } if (c == 0) { #ifndef SMALL /* * Give editline(3) a shot at unknown commands. * XXX - bogus commands with a colon in * them will not elicit an error. */ if (editing && el_parse(el, margc, (const char **)margv) != 0) #endif /* !SMALL */ fputs("?Invalid command.\n", ttyout); continue; } if (c->c_conn && !connected) { fputs("Not connected.\n", ttyout); continue; } confirmrest = 0; (*c->c_handler)(margc, margv); if (bell && c->c_bell) (void)putc('\007', ttyout); if (c->c_handler != help) break; } (void)signal(SIGINT, (sig_t)intr); (void)signal(SIGPIPE, (sig_t)lostpeer); } struct cmd * getcmd(const char *name) { const char *p, *q; struct cmd *c, *found; int nmatches, longest; if (name == NULL) return (0); longest = 0; nmatches = 0; found = 0; for (c = cmdtab; (p = c->c_name) != NULL; c++) { for (q = name; *q == *p++; q++) if (*q == 0) /* exact match? */ return (c); if (!*q) { /* the name was a prefix */ if (q - name > longest) { longest = q - name; nmatches = 1; found = c; } else if (q - name == longest) nmatches++; } } if (nmatches > 1) return ((struct cmd *)-1); return (found); } /* * Slice a string up into argc/argv. */ int slrflag; void makeargv(void) { char *argp; stringbase = line; /* scan from first of buffer */ argbase = argbuf; /* store from first of buffer */ slrflag = 0; marg_sl->sl_cur = 0; /* reset to start of marg_sl */ for (margc = 0; ; margc++) { argp = slurpstring(); sl_add(marg_sl, argp); if (argp == NULL) break; } #ifndef SMALL if (cursor_pos == line) { cursor_argc = 0; cursor_argo = 0; } else if (cursor_pos != NULL) { cursor_argc = margc; cursor_argo = strlen(margv[margc-1]); } #endif /* !SMALL */ } #ifdef SMALL #define INC_CHKCURSOR(x) (x)++ #else /* !SMALL */ #define INC_CHKCURSOR(x) { (x)++ ; \ if (x == cursor_pos) { \ cursor_argc = margc; \ cursor_argo = ap-argbase; \ cursor_pos = NULL; \ } } #endif /* !SMALL */ /* * Parse string into argbuf; * implemented with FSM to * handle quoting and strings */ char * slurpstring(void) { int got_one = 0; char *sb = stringbase; char *ap = argbase; char *tmp = argbase; /* will return this if token found */ if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */ switch (slrflag) { /* and $ as token for macro invoke */ case 0: slrflag++; INC_CHKCURSOR(stringbase); return ((*sb == '!') ? "!" : "$"); /* NOTREACHED */ case 1: slrflag++; altarg = stringbase; break; default: break; } } S0: switch (*sb) { case '\0': goto OUT; case ' ': case '\t': INC_CHKCURSOR(sb); goto S0; default: switch (slrflag) { case 0: slrflag++; break; case 1: slrflag++; altarg = sb; break; default: break; } goto S1; } S1: switch (*sb) { case ' ': case '\t': case '\0': goto OUT; /* end of token */ case '\\': INC_CHKCURSOR(sb); goto S2; /* slurp next character */ case '"': INC_CHKCURSOR(sb); goto S3; /* slurp quoted string */ default: *ap = *sb; /* add character to token */ ap++; INC_CHKCURSOR(sb); got_one = 1; goto S1; } S2: switch (*sb) { case '\0': goto OUT; default: *ap = *sb; ap++; INC_CHKCURSOR(sb); got_one = 1; goto S1; } S3: switch (*sb) { case '\0': goto OUT; case '"': INC_CHKCURSOR(sb); goto S1; default: *ap = *sb; ap++; INC_CHKCURSOR(sb); got_one = 1; goto S3; } OUT: if (got_one) *ap++ = '\0'; argbase = ap; /* update storage pointer */ stringbase = sb; /* update scan pointer */ if (got_one) { return (tmp); } switch (slrflag) { case 0: slrflag++; break; case 1: slrflag++; altarg = (char *) 0; break; default: break; } return ((char *)0); } /* * Help command. * Call each command handler with argc == 0 and argv[0] == name. */ void help(int argc, char *argv[]) { struct cmd *c; if (argc == 1) { StringList *buf; buf = sl_init(); fprintf(ttyout, "%sommands may be abbreviated. Commands are:\n\n", proxy ? "Proxy c" : "C"); for (c = cmdtab; c < &cmdtab[NCMDS]; c++) if (c->c_name && (!proxy || c->c_proxy)) sl_add(buf, c->c_name); list_vertical(buf); sl_free(buf, 0); return; } #define HELPINDENT ((int) sizeof("disconnect")) while (--argc > 0) { char *arg; arg = *++argv; c = getcmd(arg); if (c == (struct cmd *)-1) fprintf(ttyout, "?Ambiguous help command %s\n", arg); else if (c == (struct cmd *)0) fprintf(ttyout, "?Invalid help command %s\n", arg); else fprintf(ttyout, "%-*s\t%s\n", HELPINDENT, c->c_name, c->c_help); } } void usage(void) { (void)fprintf(stderr, "usage: %s [-46AadegimnptVv] [-P port] [-r seconds] [host [port]]\n" " %s [-o output] ftp://[user:password@]host[:port]/file[/]\n" " %s [-o output] http://host[:port]/file\n" " %s [-o output] host:[/path/]file[/]\n", __progname, __progname, __progname, __progname); exit(1); }