413 lines
10 KiB
C++
413 lines
10 KiB
C++
/*
|
|
* Copyright (c) 1980, 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.
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/* CV 2006-07-04: Tweaked for inclusion into Cygwin. */
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)rexec.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#ifdef __CYGWIN__
|
|
#include "winsup.h"
|
|
#include "sigproc.h"
|
|
#include "cygtls.h"
|
|
#include <wininet.h>
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <netdb.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
extern "C" {
|
|
int cygwin_accept (int, struct sockaddr *, socklen_t *);
|
|
int cygwin_connect (int, const struct sockaddr *, socklen_t);
|
|
int cygwin_gethostname (char *__name, size_t __len);
|
|
int cygwin_getsockname (int, struct sockaddr *, socklen_t *);
|
|
void cygwin_herror (const char *);
|
|
int cygwin_listen (int, int);
|
|
int cygwin_socket (int, int, int);
|
|
}
|
|
|
|
/*
|
|
* Options and other state info.
|
|
*/
|
|
struct macel {
|
|
char mac_name[9]; /* macro name */
|
|
char *mac_start; /* start of macro in macbuf */
|
|
char *mac_end; /* end of macro in macbuf */
|
|
};
|
|
|
|
int macnum; /* number of defined macros */
|
|
struct macel macros[16];
|
|
char macbuf[4096];
|
|
|
|
static FILE *cfile;
|
|
|
|
#define DEFAULT 1
|
|
#define LOGIN 2
|
|
#define PASSWD 3
|
|
#define ACCOUNT 4
|
|
#define MACDEF 5
|
|
#define ID 10
|
|
#define MACH 11
|
|
|
|
static char tokval[100];
|
|
|
|
static struct toktab {
|
|
const char *tokstr;
|
|
int tval;
|
|
} toktab[]= {
|
|
{ "default", DEFAULT },
|
|
{ "login", LOGIN },
|
|
{ "password", PASSWD },
|
|
{ "passwd", PASSWD },
|
|
{ "account", ACCOUNT },
|
|
{ "machine", MACH },
|
|
{ "macdef", MACDEF },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
static int
|
|
token()
|
|
{
|
|
char *cp;
|
|
int c;
|
|
struct toktab *t;
|
|
|
|
if (feof(cfile) || ferror(cfile))
|
|
return (0);
|
|
while ((c = getc(cfile)) != EOF &&
|
|
(c == '\n' || c == '\t' || c == ' ' || c == ','))
|
|
continue;
|
|
if (c == EOF)
|
|
return (0);
|
|
cp = tokval;
|
|
if (c == '"') {
|
|
while ((c = getc(cfile)) != EOF && c != '"') {
|
|
if (c == '\\')
|
|
c = getc(cfile);
|
|
*cp++ = c;
|
|
}
|
|
} else {
|
|
*cp++ = c;
|
|
while ((c = getc(cfile)) != EOF
|
|
&& c != '\n' && c != '\t' && c != ' ' && c != ',') {
|
|
if (c == '\\')
|
|
c = getc(cfile);
|
|
*cp++ = c;
|
|
}
|
|
}
|
|
*cp = 0;
|
|
if (tokval[0] == 0)
|
|
return (0);
|
|
for (t = toktab; t->tokstr; t++)
|
|
if (!strcmp(t->tokstr, tokval))
|
|
return (t->tval);
|
|
return (ID);
|
|
}
|
|
|
|
static int
|
|
ruserpass(const char *host, char **aname, char **apass, char **aacct)
|
|
{
|
|
const char *hdir;
|
|
char buf[BUFSIZ], *tmp;
|
|
char myname[INTERNET_MAX_HOST_NAME_LENGTH + 1];
|
|
const char *mydomain;
|
|
int t, i, c, usedefault = 0;
|
|
struct stat stb;
|
|
|
|
hdir = getenv("HOME");
|
|
if (hdir == NULL)
|
|
hdir = ".";
|
|
if (strlen(hdir) + 8 > sizeof(buf))
|
|
return (0);
|
|
(void) sprintf(buf, "%s/.netrc", hdir);
|
|
cfile = fopen(buf, "r");
|
|
if (cfile == NULL) {
|
|
if (errno != ENOENT)
|
|
warn("%s", buf);
|
|
return (0);
|
|
}
|
|
if (cygwin_gethostname(myname, sizeof(myname)) < 0)
|
|
myname[0] = '\0';
|
|
if ((mydomain = strchr(myname, '.')) == NULL)
|
|
mydomain = "";
|
|
next:
|
|
while ((t = token())) switch(t) {
|
|
|
|
case DEFAULT:
|
|
usedefault = 1;
|
|
fallthrough;
|
|
|
|
case MACH:
|
|
if (!usedefault) {
|
|
if (token() != ID)
|
|
continue;
|
|
/*
|
|
* Allow match either for user's input host name
|
|
* or official hostname. Also allow match of
|
|
* incompletely-specified host in local domain.
|
|
*/
|
|
if (strcasecmp(host, tokval) == 0)
|
|
goto match;
|
|
if ((tmp = strchr(host, '.')) != NULL &&
|
|
strcasecmp(tmp, mydomain) == 0 &&
|
|
strncasecmp(host, tokval, tmp - host) == 0 &&
|
|
tokval[tmp - host] == '\0')
|
|
goto match;
|
|
continue;
|
|
}
|
|
match:
|
|
while ((t = token()) && t != MACH && t != DEFAULT) switch(t) {
|
|
|
|
case LOGIN:
|
|
if (token()) {
|
|
if (*aname == 0) {
|
|
*aname = (char *) malloc((unsigned) strlen(tokval) + 1);
|
|
(void) strcpy(*aname, tokval);
|
|
} else {
|
|
if (strcmp(*aname, tokval))
|
|
goto next;
|
|
}
|
|
}
|
|
break;
|
|
case PASSWD:
|
|
if ((*aname == 0 || strcmp(*aname, "anonymous")) &&
|
|
fstat64(fileno(cfile), &stb) >= 0 &&
|
|
(stb.st_mode & 077) != 0) {
|
|
warnx("Error: .netrc file is readable by others.");
|
|
warnx("Remove password or make file unreadable by others.");
|
|
goto bad;
|
|
}
|
|
if (token() && *apass == 0) {
|
|
*apass = (char *) malloc((unsigned) strlen(tokval) + 1);
|
|
(void) strcpy(*apass, tokval);
|
|
}
|
|
break;
|
|
case ACCOUNT:
|
|
if (fstat64(fileno(cfile), &stb) >= 0
|
|
&& (stb.st_mode & 077) != 0) {
|
|
warnx("Error: .netrc file is readable by others.");
|
|
warnx("Remove account or make file unreadable by others.");
|
|
goto bad;
|
|
}
|
|
if (token() && aacct && *aacct == 0) {
|
|
*aacct = (char *) malloc((unsigned) strlen(tokval) + 1);
|
|
(void) strcpy(*aacct, tokval);
|
|
}
|
|
break;
|
|
case MACDEF:
|
|
while ((c=getc(cfile)) != EOF &&
|
|
(c == ' ' || c == '\t'))
|
|
;
|
|
if (c == EOF || c == '\n') {
|
|
printf("Missing macdef name argument.\n");
|
|
goto bad;
|
|
}
|
|
if (macnum == 16) {
|
|
printf("Limit of 16 macros have already been defined\n");
|
|
goto bad;
|
|
}
|
|
tmp = macros[macnum].mac_name;
|
|
*tmp++ = c;
|
|
for (i=0; i < 8 && (c=getc(cfile)) != EOF &&
|
|
!isspace(c); ++i) {
|
|
*tmp++ = c;
|
|
}
|
|
if (c == EOF) {
|
|
printf("Macro definition missing null line terminator.\n");
|
|
goto bad;
|
|
}
|
|
*tmp = '\0';
|
|
if (c != '\n') {
|
|
while ((c=getc(cfile)) != EOF && c != '\n');
|
|
}
|
|
if (c == EOF) {
|
|
printf("Macro definition missing null line terminator.\n");
|
|
goto bad;
|
|
}
|
|
if (macnum == 0) {
|
|
macros[macnum].mac_start = macbuf;
|
|
}
|
|
else {
|
|
macros[macnum].mac_start = macros[macnum-1].mac_end + 1;
|
|
}
|
|
tmp = macros[macnum].mac_start;
|
|
while (tmp != macbuf + 4096) {
|
|
if ((c=getc(cfile)) == EOF) {
|
|
printf("Macro definition missing null line terminator.\n");
|
|
goto bad;
|
|
}
|
|
*tmp = c;
|
|
if (*tmp == '\n') {
|
|
if (*(tmp-1) == '\0') {
|
|
macros[macnum++].mac_end = tmp - 1;
|
|
break;
|
|
}
|
|
*tmp = '\0';
|
|
}
|
|
tmp++;
|
|
}
|
|
if (tmp == macbuf + 4096) {
|
|
printf("4K macro buffer exceeded\n");
|
|
goto bad;
|
|
}
|
|
break;
|
|
default:
|
|
warnx("Unknown .netrc keyword %s", tokval);
|
|
break;
|
|
}
|
|
goto done;
|
|
}
|
|
done:
|
|
(void) fclose(cfile);
|
|
return (0);
|
|
bad:
|
|
(void) fclose(cfile);
|
|
return (-1);
|
|
}
|
|
|
|
extern "C" int
|
|
cygwin_rexec (char **ahost, unsigned short rport, char *name, char *pass,
|
|
char *cmd, int *fd2p)
|
|
{
|
|
struct sockaddr_in sin, sin2, from;
|
|
struct hostent *hp;
|
|
uint16_t port = 0;
|
|
int s, timo = 1, s3;
|
|
char c;
|
|
static char ahostbuf[INTERNET_MAX_HOST_NAME_LENGTH + 1];
|
|
|
|
__try
|
|
{
|
|
hp = cygwin_gethostbyname(*ahost);
|
|
if (hp == 0) {
|
|
cygwin_herror(*ahost);
|
|
return (-1);
|
|
}
|
|
*ahost = strcpy (ahostbuf, hp->h_name);
|
|
ruserpass(hp->h_name, &name, &pass, NULL);
|
|
if (!name)
|
|
name = getlogin ();
|
|
if (!pass)
|
|
pass = almost_null;
|
|
retry:
|
|
s = cygwin_socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s < 0) {
|
|
perror("rexec: socket");
|
|
return (-1);
|
|
}
|
|
sin.sin_family = hp->h_addrtype;
|
|
sin.sin_port = rport;
|
|
bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
|
|
if (cygwin_connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
|
|
if (errno == ECONNREFUSED && timo <= 16) {
|
|
(void) close(s);
|
|
sleep(timo);
|
|
timo *= 2;
|
|
goto retry;
|
|
}
|
|
perror(hp->h_name);
|
|
return (-1);
|
|
}
|
|
if (fd2p == 0) {
|
|
(void) write(s, "", 1);
|
|
} else {
|
|
char num[8];
|
|
int s2, sin2len;
|
|
|
|
s2 = cygwin_socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s2 < 0) {
|
|
(void) close(s);
|
|
return (-1);
|
|
}
|
|
cygwin_listen(s2, 1);
|
|
sin2len = sizeof (sin2);
|
|
if (cygwin_getsockname(s2, (struct sockaddr *)&sin2, &sin2len) < 0 ||
|
|
sin2len != sizeof (sin2)) {
|
|
perror("getsockname");
|
|
(void) close(s2);
|
|
goto bad;
|
|
}
|
|
port = ntohs((uint16_t)sin2.sin_port);
|
|
(void) sprintf(num, "%u", port);
|
|
(void) write(s, num, strlen(num)+1);
|
|
{ int len = sizeof (from);
|
|
s3 = cygwin_accept(s2, (struct sockaddr *)&from, &len);
|
|
close(s2);
|
|
if (s3 < 0) {
|
|
perror("accept");
|
|
port = 0;
|
|
goto bad;
|
|
}
|
|
}
|
|
*fd2p = s3;
|
|
}
|
|
(void) write(s, name, strlen(name) + 1);
|
|
/* should public key encypt the password here */
|
|
(void) write(s, pass, strlen(pass) + 1);
|
|
(void) write(s, cmd, strlen(cmd) + 1);
|
|
if (read(s, &c, 1) != 1) {
|
|
perror(*ahost);
|
|
goto bad;
|
|
}
|
|
if (c != 0) {
|
|
while (read(s, &c, 1) == 1) {
|
|
(void) write(2, &c, 1);
|
|
if (c == '\n')
|
|
break;
|
|
}
|
|
goto bad;
|
|
}
|
|
return (s);
|
|
bad:
|
|
if (port)
|
|
(void) close(*fd2p);
|
|
(void) close(s);
|
|
}
|
|
__except (EFAULT) {}
|
|
__endtry
|
|
return (-1);
|
|
}
|