742 lines
15 KiB
C
742 lines
15 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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 const char copyright[] =
|
|
"@(#) Copyright (c) 1983, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$Id: main.c,v 1.5 1997/08/14 06:47:39 charnier Exp $";
|
|
#endif /* not lint */
|
|
|
|
/* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
|
|
|
|
/*
|
|
* TFTP User Program -- Command Interface.
|
|
*/
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/file.h>
|
|
#include <sys/param.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <arpa/inet.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <netdb.h>
|
|
#include <setjmp.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "extern.h"
|
|
|
|
#define TIMEOUT 5 /* secs between rexmt's */
|
|
|
|
struct sockaddr_in peeraddr;
|
|
int f;
|
|
short port;
|
|
int trace;
|
|
int verbose;
|
|
int connected;
|
|
char mode[32];
|
|
char line[200];
|
|
int margc;
|
|
char *margv[20];
|
|
char *prompt = "tftp";
|
|
jmp_buf toplevel;
|
|
void intr();
|
|
struct servent *sp;
|
|
|
|
void get __P((int, char **));
|
|
void help __P((int, char **));
|
|
void modecmd __P((int, char **));
|
|
void put __P((int, char **));
|
|
void quit __P((int, char **));
|
|
void setascii __P((int, char **));
|
|
void setbinary __P((int, char **));
|
|
void setpeer __P((int, char **));
|
|
void setrexmt __P((int, char **));
|
|
void settimeout __P((int, char **));
|
|
void settrace __P((int, char **));
|
|
void setverbose __P((int, char **));
|
|
void status __P((int, char **));
|
|
|
|
static void command __P((void)) __dead2;
|
|
|
|
static void getusage __P((char *));
|
|
static void makeargv __P((void));
|
|
static void putusage __P((char *));
|
|
static void settftpmode __P((char *));
|
|
|
|
#define HELPINDENT (sizeof("connect"))
|
|
|
|
struct cmd {
|
|
char *name;
|
|
char *help;
|
|
void (*handler) __P((int, char **));
|
|
};
|
|
|
|
char vhelp[] = "toggle verbose mode";
|
|
char thelp[] = "toggle packet tracing";
|
|
char chelp[] = "connect to remote tftp";
|
|
char qhelp[] = "exit tftp";
|
|
char hhelp[] = "print help information";
|
|
char shelp[] = "send file";
|
|
char rhelp[] = "receive file";
|
|
char mhelp[] = "set file transfer mode";
|
|
char sthelp[] = "show current status";
|
|
char xhelp[] = "set per-packet retransmission timeout";
|
|
char ihelp[] = "set total retransmission timeout";
|
|
char ashelp[] = "set mode to netascii";
|
|
char bnhelp[] = "set mode to octet";
|
|
|
|
struct cmd cmdtab[] = {
|
|
{ "connect", chelp, setpeer },
|
|
{ "mode", mhelp, modecmd },
|
|
{ "put", shelp, put },
|
|
{ "get", rhelp, get },
|
|
{ "quit", qhelp, quit },
|
|
{ "verbose", vhelp, setverbose },
|
|
{ "trace", thelp, settrace },
|
|
{ "status", sthelp, status },
|
|
{ "binary", bnhelp, setbinary },
|
|
{ "ascii", ashelp, setascii },
|
|
{ "rexmt", xhelp, setrexmt },
|
|
{ "timeout", ihelp, settimeout },
|
|
{ "?", hhelp, help },
|
|
{ 0 }
|
|
};
|
|
|
|
struct cmd *getcmd();
|
|
char *tail();
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
struct sockaddr_in sin;
|
|
|
|
sp = getservbyname("tftp", "udp");
|
|
if (sp == 0)
|
|
errx(1, "udp/tftp: unknown service");
|
|
f = socket(AF_INET, SOCK_DGRAM, 0);
|
|
if (f < 0)
|
|
err(3, "socket");
|
|
bzero((char *)&sin, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
if (bind(f, (struct sockaddr *)&sin, sizeof(sin)) < 0)
|
|
err(1, "bind");
|
|
strcpy(mode, "netascii");
|
|
signal(SIGINT, intr);
|
|
if (argc > 1) {
|
|
if (setjmp(toplevel) != 0)
|
|
exit(0);
|
|
setpeer(argc, argv);
|
|
}
|
|
if (setjmp(toplevel) != 0)
|
|
(void)putchar('\n');
|
|
command();
|
|
}
|
|
|
|
char hostname[MAXHOSTNAMELEN];
|
|
|
|
void
|
|
setpeer(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
struct hostent *host;
|
|
|
|
if (argc < 2) {
|
|
strcpy(line, "Connect ");
|
|
printf("(to) ");
|
|
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
|
|
makeargv();
|
|
argc = margc;
|
|
argv = margv;
|
|
}
|
|
if (argc > 3) {
|
|
printf("usage: %s host-name [port]\n", argv[0]);
|
|
return;
|
|
}
|
|
host = gethostbyname(argv[1]);
|
|
if (host) {
|
|
peeraddr.sin_family = host->h_addrtype;
|
|
bcopy(host->h_addr, &peeraddr.sin_addr,
|
|
MIN(sizeof(peeraddr.sin_addr), host->h_length));
|
|
strncpy(hostname, host->h_name, sizeof(hostname));
|
|
} else {
|
|
peeraddr.sin_family = AF_INET;
|
|
peeraddr.sin_addr.s_addr = inet_addr(argv[1]);
|
|
if (peeraddr.sin_addr.s_addr == -1) {
|
|
connected = 0;
|
|
printf("%s: unknown host\n", argv[1]);
|
|
return;
|
|
}
|
|
strncpy(hostname, argv[1], sizeof(hostname));
|
|
}
|
|
hostname[sizeof(hostname) - 1] = '\0';
|
|
port = sp->s_port;
|
|
if (argc == 3) {
|
|
port = atoi(argv[2]);
|
|
if (port < 0) {
|
|
printf("%s: bad port number\n", argv[2]);
|
|
connected = 0;
|
|
return;
|
|
}
|
|
port = htons(port);
|
|
}
|
|
connected = 1;
|
|
}
|
|
|
|
struct modes {
|
|
char *m_name;
|
|
char *m_mode;
|
|
} modes[] = {
|
|
{ "ascii", "netascii" },
|
|
{ "netascii", "netascii" },
|
|
{ "binary", "octet" },
|
|
{ "image", "octet" },
|
|
{ "octet", "octet" },
|
|
/* { "mail", "mail" }, */
|
|
{ 0, 0 }
|
|
};
|
|
|
|
void
|
|
modecmd(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
register struct modes *p;
|
|
char *sep;
|
|
|
|
if (argc < 2) {
|
|
printf("Using %s mode to transfer files.\n", mode);
|
|
return;
|
|
}
|
|
if (argc == 2) {
|
|
for (p = modes; p->m_name; p++)
|
|
if (strcmp(argv[1], p->m_name) == 0)
|
|
break;
|
|
if (p->m_name) {
|
|
settftpmode(p->m_mode);
|
|
return;
|
|
}
|
|
printf("%s: unknown mode\n", argv[1]);
|
|
/* drop through and print usage message */
|
|
}
|
|
|
|
printf("usage: %s [", argv[0]);
|
|
sep = " ";
|
|
for (p = modes; p->m_name; p++) {
|
|
printf("%s%s", sep, p->m_name);
|
|
if (*sep == ' ')
|
|
sep = " | ";
|
|
}
|
|
printf(" ]\n");
|
|
return;
|
|
}
|
|
|
|
void
|
|
setbinary(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
|
|
settftpmode("octet");
|
|
}
|
|
|
|
void
|
|
setascii(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
|
|
settftpmode("netascii");
|
|
}
|
|
|
|
static void
|
|
settftpmode(newmode)
|
|
char *newmode;
|
|
{
|
|
strcpy(mode, newmode);
|
|
if (verbose)
|
|
printf("mode set to %s\n", mode);
|
|
}
|
|
|
|
|
|
/*
|
|
* Send file(s).
|
|
*/
|
|
void
|
|
put(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int fd;
|
|
register int n;
|
|
register char *cp, *targ;
|
|
|
|
if (argc < 2) {
|
|
strcpy(line, "send ");
|
|
printf("(file) ");
|
|
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
|
|
makeargv();
|
|
argc = margc;
|
|
argv = margv;
|
|
}
|
|
if (argc < 2) {
|
|
putusage(argv[0]);
|
|
return;
|
|
}
|
|
targ = argv[argc - 1];
|
|
if (index(argv[argc - 1], ':')) {
|
|
char *cp;
|
|
struct hostent *hp;
|
|
|
|
for (n = 1; n < argc - 1; n++)
|
|
if (index(argv[n], ':')) {
|
|
putusage(argv[0]);
|
|
return;
|
|
}
|
|
cp = argv[argc - 1];
|
|
targ = index(cp, ':');
|
|
*targ++ = 0;
|
|
hp = gethostbyname(cp);
|
|
if (hp == NULL) {
|
|
fprintf(stderr, "tftp: %s: ", cp);
|
|
herror((char *)NULL);
|
|
return;
|
|
}
|
|
bcopy(hp->h_addr, (caddr_t)&peeraddr.sin_addr,
|
|
MIN(sizeof(peeraddr.sin_addr), hp->h_length));
|
|
peeraddr.sin_family = hp->h_addrtype;
|
|
connected = 1;
|
|
strncpy(hostname, hp->h_name, sizeof(hostname));
|
|
hostname[sizeof(hostname) - 1] = '\0';
|
|
}
|
|
if (!connected) {
|
|
printf("No target machine specified.\n");
|
|
return;
|
|
}
|
|
if (argc < 4) {
|
|
cp = argc == 2 ? tail(targ) : argv[1];
|
|
fd = open(cp, O_RDONLY);
|
|
if (fd < 0) {
|
|
warn("%s", cp);
|
|
return;
|
|
}
|
|
if (verbose)
|
|
printf("putting %s to %s:%s [%s]\n",
|
|
cp, hostname, targ, mode);
|
|
peeraddr.sin_port = port;
|
|
sendfile(fd, targ, mode);
|
|
return;
|
|
}
|
|
/* this assumes the target is a directory */
|
|
/* on a remote unix system. hmmmm. */
|
|
cp = index(targ, '\0');
|
|
*cp++ = '/';
|
|
for (n = 1; n < argc - 1; n++) {
|
|
strcpy(cp, tail(argv[n]));
|
|
fd = open(argv[n], O_RDONLY);
|
|
if (fd < 0) {
|
|
warn("%s", argv[n]);
|
|
continue;
|
|
}
|
|
if (verbose)
|
|
printf("putting %s to %s:%s [%s]\n",
|
|
argv[n], hostname, targ, mode);
|
|
peeraddr.sin_port = port;
|
|
sendfile(fd, targ, mode);
|
|
}
|
|
}
|
|
|
|
static void
|
|
putusage(s)
|
|
char *s;
|
|
{
|
|
printf("usage: %s file ... host:target, or\n", s);
|
|
printf(" %s file ... target (when already connected)\n", s);
|
|
}
|
|
|
|
/*
|
|
* Receive file(s).
|
|
*/
|
|
void
|
|
get(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int fd;
|
|
register int n;
|
|
register char *cp;
|
|
char *src;
|
|
|
|
if (argc < 2) {
|
|
strcpy(line, "get ");
|
|
printf("(files) ");
|
|
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
|
|
makeargv();
|
|
argc = margc;
|
|
argv = margv;
|
|
}
|
|
if (argc < 2) {
|
|
getusage(argv[0]);
|
|
return;
|
|
}
|
|
if (!connected) {
|
|
for (n = 1; n < argc ; n++)
|
|
if (index(argv[n], ':') == 0) {
|
|
getusage(argv[0]);
|
|
return;
|
|
}
|
|
}
|
|
for (n = 1; n < argc ; n++) {
|
|
src = index(argv[n], ':');
|
|
if (src == NULL)
|
|
src = argv[n];
|
|
else {
|
|
struct hostent *hp;
|
|
|
|
*src++ = 0;
|
|
hp = gethostbyname(argv[n]);
|
|
if (hp == NULL) {
|
|
fprintf(stderr, "tftp: %s: ", argv[n]);
|
|
herror((char *)NULL);
|
|
continue;
|
|
}
|
|
bcopy(hp->h_addr, (caddr_t)&peeraddr.sin_addr,
|
|
MIN(sizeof(peeraddr.sin_addr), hp->h_length));
|
|
peeraddr.sin_family = hp->h_addrtype;
|
|
connected = 1;
|
|
strncpy(hostname, hp->h_name, sizeof(hostname));
|
|
hostname[sizeof(hostname) - 1] = '\0';
|
|
}
|
|
if (argc < 4) {
|
|
cp = argc == 3 ? argv[2] : tail(src);
|
|
fd = creat(cp, 0644);
|
|
if (fd < 0) {
|
|
warn("%s", cp);
|
|
return;
|
|
}
|
|
if (verbose)
|
|
printf("getting from %s:%s to %s [%s]\n",
|
|
hostname, src, cp, mode);
|
|
peeraddr.sin_port = port;
|
|
recvfile(fd, src, mode);
|
|
break;
|
|
}
|
|
cp = tail(src); /* new .. jdg */
|
|
fd = creat(cp, 0644);
|
|
if (fd < 0) {
|
|
warn("%s", cp);
|
|
continue;
|
|
}
|
|
if (verbose)
|
|
printf("getting from %s:%s to %s [%s]\n",
|
|
hostname, src, cp, mode);
|
|
peeraddr.sin_port = port;
|
|
recvfile(fd, src, mode);
|
|
}
|
|
}
|
|
|
|
static void
|
|
getusage(s)
|
|
char *s;
|
|
{
|
|
printf("usage: %s host:file host:file ... file, or\n", s);
|
|
printf(" %s file file ... file if connected\n", s);
|
|
}
|
|
|
|
int rexmtval = TIMEOUT;
|
|
|
|
void
|
|
setrexmt(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int t;
|
|
|
|
if (argc < 2) {
|
|
strcpy(line, "Rexmt-timeout ");
|
|
printf("(value) ");
|
|
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
|
|
makeargv();
|
|
argc = margc;
|
|
argv = margv;
|
|
}
|
|
if (argc != 2) {
|
|
printf("usage: %s value\n", argv[0]);
|
|
return;
|
|
}
|
|
t = atoi(argv[1]);
|
|
if (t < 0)
|
|
printf("%s: bad value\n", argv[1]);
|
|
else
|
|
rexmtval = t;
|
|
}
|
|
|
|
int maxtimeout = 5 * TIMEOUT;
|
|
|
|
void
|
|
settimeout(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int t;
|
|
|
|
if (argc < 2) {
|
|
strcpy(line, "Maximum-timeout ");
|
|
printf("(value) ");
|
|
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
|
|
makeargv();
|
|
argc = margc;
|
|
argv = margv;
|
|
}
|
|
if (argc != 2) {
|
|
printf("usage: %s value\n", argv[0]);
|
|
return;
|
|
}
|
|
t = atoi(argv[1]);
|
|
if (t < 0)
|
|
printf("%s: bad value\n", argv[1]);
|
|
else
|
|
maxtimeout = t;
|
|
}
|
|
|
|
void
|
|
status(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
if (connected)
|
|
printf("Connected to %s.\n", hostname);
|
|
else
|
|
printf("Not connected.\n");
|
|
printf("Mode: %s Verbose: %s Tracing: %s\n", mode,
|
|
verbose ? "on" : "off", trace ? "on" : "off");
|
|
printf("Rexmt-interval: %d seconds, Max-timeout: %d seconds\n",
|
|
rexmtval, maxtimeout);
|
|
}
|
|
|
|
void
|
|
intr()
|
|
{
|
|
|
|
signal(SIGALRM, SIG_IGN);
|
|
alarm(0);
|
|
longjmp(toplevel, -1);
|
|
}
|
|
|
|
char *
|
|
tail(filename)
|
|
char *filename;
|
|
{
|
|
register char *s;
|
|
|
|
while (*filename) {
|
|
s = rindex(filename, '/');
|
|
if (s == NULL)
|
|
break;
|
|
if (s[1])
|
|
return (s + 1);
|
|
*s = '\0';
|
|
}
|
|
return (filename);
|
|
}
|
|
|
|
/*
|
|
* Command parser.
|
|
*/
|
|
static void
|
|
command()
|
|
{
|
|
register struct cmd *c;
|
|
char *cp;
|
|
|
|
for (;;) {
|
|
printf("%s> ", prompt);
|
|
if (fgets(line, sizeof line , stdin) == 0) {
|
|
if (feof(stdin)) {
|
|
exit(0);
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
if ((cp = strchr(line, '\n')))
|
|
*cp = '\0';
|
|
if (line[0] == 0)
|
|
continue;
|
|
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;
|
|
}
|
|
(*c->handler)(margc, margv);
|
|
}
|
|
}
|
|
|
|
struct cmd *
|
|
getcmd(name)
|
|
register char *name;
|
|
{
|
|
register char *p, *q;
|
|
register struct cmd *c, *found;
|
|
register int nmatches, longest;
|
|
|
|
longest = 0;
|
|
nmatches = 0;
|
|
found = 0;
|
|
for (c = cmdtab; (p = 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.
|
|
*/
|
|
static void
|
|
makeargv()
|
|
{
|
|
register char *cp;
|
|
register char **argp = margv;
|
|
|
|
margc = 0;
|
|
if ((cp = strchr(line, '\n')))
|
|
*cp = '\0';
|
|
for (cp = line; *cp;) {
|
|
while (isspace(*cp))
|
|
cp++;
|
|
if (*cp == '\0')
|
|
break;
|
|
*argp++ = cp;
|
|
margc += 1;
|
|
while (*cp != '\0' && !isspace(*cp))
|
|
cp++;
|
|
if (*cp == '\0')
|
|
break;
|
|
*cp++ = '\0';
|
|
}
|
|
*argp++ = 0;
|
|
}
|
|
|
|
void
|
|
quit(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* Help command.
|
|
*/
|
|
void
|
|
help(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
register struct cmd *c;
|
|
|
|
if (argc == 1) {
|
|
printf("Commands may be abbreviated. Commands are:\n\n");
|
|
for (c = cmdtab; c->name; c++)
|
|
printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
|
|
return;
|
|
}
|
|
while (--argc > 0) {
|
|
register 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("%s\n", c->help);
|
|
}
|
|
}
|
|
|
|
void
|
|
settrace(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
trace = !trace;
|
|
printf("Packet tracing %s.\n", trace ? "on" : "off");
|
|
}
|
|
|
|
void
|
|
setverbose(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
verbose = !verbose;
|
|
printf("Verbose mode %s.\n", verbose ? "on" : "off");
|
|
}
|