gno/usr.bin/ftp/main.c

#ifdef __ORCAC__
segment "ftpmain   ";
#endif

char copyright[] =
"@(#) Copyright (c) 1985, 1989 Regents of the University of California.\n\
 All rights reserved.\n";

static char sccsid[] = "@(#)main.c	5.18 (Berkeley) 3/1/91";

/*
 * FTP User Program -- Command Interface.
 */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>

#include <arpa/ftp.h>

#include <gno/gno.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <netdb.h>
#include <pwd.h>

#include "ftp.var.h"
#include "ftp.h"
#include "cmds.h"
#include "domacro.h"
#include "main.h"

extern	char *home;

int
main (int argc, char **argv)
{
char *cp;
int top;
struct passwd *pw = NULL;
static char homedir[MAXPATHLEN];

	sp = getservbyname("ftp", "tcp");
	if (sp == 0) {
		fprintf(stderr, "ftp: ftp/tcp: unknown service\n");
		exit(1);
	}
	doglob = 1;
	interactive = 1;
	autologin = 1;
	argc--, argv++;
	while (argc > 0 && **argv == '-') {
		for (cp = *argv + 1; *cp; cp++)
			switch (*cp) {

			case 'd':
				options |= SO_DEBUG;
				debug++;
				break;
			
			case 'v':
				verbose++;
				break;

			case 't':
				trace++;
				break;

			case 'i':
				interactive = 0;
				break;

			case 'n':
				autologin = 0;
				break;

			case 'g':
				doglob = 0;
				break;

			default:
				fprintf(stdout,
				  "ftp: %c: unknown option\n", *cp);
				exit(1);
			}
		argc--, argv++;
	}
	fromatty = isatty(fileno(stdin));
	if (fromatty)
		verbose++;
	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) {
		home = homedir;
		strcpy(home, pw->pw_dir);
	}
	if (argc > 0) {
		if (setjmp(toplevel))
			exit(0);
		signal(SIGINT, intr);
		signal(SIGPIPE, lostpeer);
		setpeer(argc + 1, argv - 1);
	}
	top = setjmp(toplevel) == 0;
	if (top) {
		signal(SIGINT, intr);
		signal(SIGPIPE, lostpeer);
	}
	for (;;) {
		cmdscanner(top);
		top = 1;
	}
}

#pragma databank 1
void
intr (int sig, int code)
{
	longjmp (toplevel, 1);
}

void
lostpeer (int sig, int code)
{
extern FILE *cout;
extern int data;

	if (connected) {
		if (cout != NULL) {
#ifdef HAVE_SHUTDOWN
			shutdown(fileno(cout), 1+1);
#endif
			fclose(cout);
			cout = NULL;
		}
		if (data >= 0) {
#ifdef HAVE_SHUTDOWN
			shutdown(data, 1+1);
#endif
			close(data);
			data = -1;
		}
		connected = 0;
	}
	pswitch(1);
	if (connected) {
		if (cout != NULL) {
#ifdef HAVE_SHUTDOWN
			shutdown(fileno(cout), 1+1);
#endif
			fclose(cout);
			cout = NULL;
		}
		connected = 0;
	}
	proxflag = 0;
	pswitch(0);
}
#pragma databank 0

/*
 * Command parser.
 */
int
cmdscanner (int top)
{
struct cmd *c;
int l;

	if (!top)
		putchar('\n');
	for (;;) {
		if (fromatty) {
			printf("ftp> ");
			fflush(stdout);
		}
		if (fgets(line, 200, stdin) == NULL)
			quit(0, NULL);
		l = strlen(line);
		if (l == 0)
			break;
		if (line[--l] == '\n') {
			if (l == 0)
				break;
			line[l] = '\0';
		} else if (l == sizeof(line) - 2) {
			printf("sorry, input line too long\n");
			while ((l = getchar()) != '\n' && l != EOF)
				/* void */;
			break;
		} /* else it was a line without a newline */
		makeargv();
		if (margc == 0) {
			continue;
		}
		c = getcmd(margv[0]);
		if (c == (struct cmd *)-1) {
			printf("?Ambiguous command\n");
			continue;
		}
		if (c == 0) {
			printf("?Invalid command\n");
			continue;
		}
		if (c->c_conn && !connected) {
			printf("Not connected.\n");
			continue;
		}
		(*c->c_handler)(margc, margv);
		if (bell && c->c_bell)
			putchar('\007');
		if (c->c_handler != help)
			break;
	}
	signal(SIGINT, intr);
	signal(SIGPIPE, lostpeer);
}

struct cmd *
getcmd (char *name)
{
extern struct cmd cmdtab[];
char *p, *q;
struct cmd *c, *found;
int nmatches, longest;

	longest = 0;
	nmatches = 0;
	found = 0;
	for (c = cmdtab; p = c->c_name; 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;

	margc = 0;
	argp = margv;
	stringbase = line;		/* scan from first of buffer */
	argbase = argbuf;		/* store from first of buffer */
	slrflag = 0;
	while (*argp++ = slurpstring())
		margc++;
}

/*
 * 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++;
				stringbase++;
				return ((*sb == '!') ? "!" : "$");
				/* NOTREACHED */
			case 1:
				slrflag++;
				altarg = stringbase;
				break;
			default:
				break;
		}
	}

S0:
	switch (*sb) {

	case '\0':
		goto OUT;

	case ' ':
	case '\t':
		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 '\\':
		sb++; goto S2;	/* slurp next character */

	case '"':
		sb++; goto S3;	/* slurp quoted string */

	default:
		*ap++ = *sb++;	/* add character to token */
		got_one = 1;
		goto S1;
	}

S2:
	switch (*sb) {

	case '\0':
		goto OUT;

	default:
		*ap++ = *sb++;
		got_one = 1;
		goto S1;
	}

S3:
	switch (*sb) {

	case '\0':
		goto OUT;

	case '"':
		sb++; goto S1;

	default:
		*ap++ = *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)
{
extern struct cmd cmdtab[];
struct cmd *c;

	if (argc == 1) {
		int i, j, w, k;
		int columns, width = 0, lines;
		extern int NCMDS;

		printf("Commands may be abbreviated.  Commands are:\n\n");
		for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
			int len = strlen(c->c_name);

			if (len > width)
				width = len;
		}
		width = (width + 8) &~ 7;
		columns = 80 / width;
		if (columns == 0)
			columns = 1;
		lines = (NCMDS + columns - 1) / columns;
		for (i = 0; i < lines; i++) {
			for (j = 0; j < columns; j++) {
				c = cmdtab + j * lines + i;
				if (c->c_name && (!proxy || c->c_proxy)) {
					printf("%s", c->c_name);
				}
				else if (c->c_name) {
					for (k=0; k < strlen(c->c_name); k++) {
						putchar(' ');
					}
				}
				if (c + lines >= &cmdtab[NCMDS]) {
					printf("\n");
					break;
				}
				w = strlen(c->c_name);
				while (w < width) {
					w = (w + 8) &~ 7;
					putchar('\t');
				}
			}
		}
		return;
	}
	while (--argc > 0) {
		char *arg;
		arg = *++argv;
		c = getcmd(arg);
		if (c == (struct cmd *)-1)
			printf("?Ambiguous help command %s\n", arg);
		else if (c == (struct cmd *)0)
			printf("?Invalid help command %s\n", arg);
		else
			printf("%10s\t%s\n", c->c_name, c->c_help);
	}
}