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Use full path in synopsis. Syslog will add trailing \n.

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This commit is contained in:
Philippe Charnier 1997-12-03 07:19:58 +00:00
parent 5f806c3ccf
commit a8faeabc96
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=31512
2 changed files with 39 additions and 27 deletions
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34
libexec/tftpd/tftpd.8
View File

@ -39,7 +39,7 @@
.Nd
Internet Trivial File Transfer Protocol server
.Sh SYNOPSIS
.Nm tftpd
.Nm /usr/libexec/tftpd
.Op Fl l
.Op Fl n
.Op Fl s Ar directory
@ -65,7 +65,7 @@ The use of
.Xr tftp 1
does not require an account or password on the remote system.
Due to the lack of authentication information,
.Nm tftpd
.Nm
will allow only publicly readable files to be
accessed.
Files containing the string ``/\|\fB.\|.\fP\|/'' or starting with
@ -80,7 +80,7 @@ should be considered before enabling tftp service.
The server should have the user ID with the lowest possible privilege.
.Pp
Access to files may be restricted by invoking
.Nm tftpd
.Nm
with a list of directories by including up to 20 pathnames
as server program arguments in
.Pa /etc/inetd.conf .
@ -90,30 +90,40 @@ The given directories are also treated as a search path for
relative filename requests.
.Pp
The chroot option provides additional security by restricting access
of tftpd to only a chroot'd file system. This is useful when moving
of
.Nm
to only a chroot'd file system. This is useful when moving
from an OS that supported
.Nm -s
.Fl s
as a boot server. Because chroot is restricted to root, you must run
tftpd as root. However, if you chroot, then
.Nm tftpd
.Nm
as root. However, if you chroot, then
.Nm
will set its user id to nobody.
.Pp
The options are:
.Bl -tag -width Ds
.It Fl l
Logs all requests using
Log all requests using
.Xr syslog 3 .
.It Fl n
Suppresses negative acknowledgement of requests for nonexistent
Suppress negative acknowledgement of requests for nonexistent
relative filenames.
.It Fl s Ar directory
Causes tftpd to chroot to
Cause
.Nm
to chroot to
.Pa directory
before accepting commands. In addition, the user id is set to
nobody.
.Pp
If you are not running -s, no user id change will be
attempted. You should not run tftpd as root unless you are using -s.
If you are not running
.Fl s ,
no user id change will be
attempted. You should not run
.Nm
as root unless you are using
.Fl s .
.El
.Sh SEE ALSO
.Xr tftp 1 ,

32
libexec/tftpd/tftpd.c
View File

@ -29,18 +29,20 @@
* 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.
*
* $Id: tftpd.c,v 1.8 1997/03/24 06:04:08 imp Exp $
*/
#ifndef lint
static char copyright[] =
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[] = "@(#)tftpd.c 8.1 (Berkeley) 6/4/93";
#endif
static const char rcsid[] =
"$Id$";
#endif /* not lint */
/*
@ -64,6 +66,7 @@ static char sccsid[] = "@(#)tftpd.c 8.1 (Berkeley) 6/4/93";
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
@ -71,7 +74,6 @@ static char sccsid[] = "@(#)tftpd.c 8.1 (Berkeley) 6/4/93";
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <pwd.h>
#include "tftpsubs.h"
@ -156,14 +158,14 @@ main(argc, argv)
on = 1;
if (ioctl(0, FIONBIO, &on) < 0) {
syslog(LOG_ERR, "ioctl(FIONBIO): %m\n");
syslog(LOG_ERR, "ioctl(FIONBIO): %m");
exit(1);
}
fromlen = sizeof (from);
n = recvfrom(0, buf, sizeof (buf), 0,
(struct sockaddr *)&from, &fromlen);
if (n < 0) {
syslog(LOG_ERR, "recvfrom: %m\n");
syslog(LOG_ERR, "recvfrom: %m");
exit(1);
}
/*
@ -210,7 +212,7 @@ main(argc, argv)
}
}
if (pid < 0) {
syslog(LOG_ERR, "fork: %m\n");
syslog(LOG_ERR, "fork: %m");
exit(1);
} else if (pid != 0) {
exit(0);
@ -242,17 +244,17 @@ main(argc, argv)
close(1);
peer = socket(AF_INET, SOCK_DGRAM, 0);
if (peer < 0) {
syslog(LOG_ERR, "socket: %m\n");
syslog(LOG_ERR, "socket: %m");
exit(1);
}
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
if (bind(peer, (struct sockaddr *)&sin, sizeof (sin)) < 0) {
syslog(LOG_ERR, "bind: %m\n");
syslog(LOG_ERR, "bind: %m");
exit(1);
}
if (connect(peer, (struct sockaddr *)&from, sizeof(from)) < 0) {
syslog(LOG_ERR, "connect: %m\n");
syslog(LOG_ERR, "connect: %m");
exit(1);
}
tp = (struct tftphdr *)buf;
@ -488,7 +490,7 @@ sendfile(pf)
send_data:
if (send(peer, dp, size + 4, 0) != size + 4) {
syslog(LOG_ERR, "tftpd: write: %m\n");
syslog(LOG_ERR, "write: %m");
goto abort;
}
read_ahead(file, pf->f_convert);
@ -497,7 +499,7 @@ sendfile(pf)
n = recv(peer, ackbuf, sizeof (ackbuf), 0);
alarm(0);
if (n < 0) {
syslog(LOG_ERR, "tftpd: read: %m\n");
syslog(LOG_ERR, "read: %m");
goto abort;
}
ap->th_opcode = ntohs((u_short)ap->th_opcode);
@ -553,7 +555,7 @@ recvfile(pf)
(void) setjmp(timeoutbuf);
send_ack:
if (send(peer, ackbuf, 4, 0) != 4) {
syslog(LOG_ERR, "tftpd: write: %m\n");
syslog(LOG_ERR, "write: %m");
goto abort;
}
write_behind(file, pf->f_convert);
@ -562,7 +564,7 @@ recvfile(pf)
n = recv(peer, dp, PKTSIZE, 0);
alarm(0);
if (n < 0) { /* really? */
syslog(LOG_ERR, "tftpd: read: %m\n");
syslog(LOG_ERR, "read: %m");
goto abort;
}
dp->th_opcode = ntohs((u_short)dp->th_opcode);
@ -666,7 +668,7 @@ nak(error)
tp->th_msg[length] = '\0';
length += 5;
if (send(peer, buf, length, 0) != length)
syslog(LOG_ERR, "nak: %m\n");
syslog(LOG_ERR, "nak: %m");
}
static char *