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mc/vfs/utilvfs.c

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/* Utilities for VFS modules.
Currently includes login and tcp open socket routines.
Copyright (C) 1995, 1996 Miguel de Icaza
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifndef test_get_host_and_username
#include <config.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <pwd.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <malloc.h>
#ifdef USE_TERMNET
#include <termnet.h>
#endif
#include <errno.h>
#ifndef test_get_host_and_username
#include "tcputil.h"
#include "../src/dialog.h" /* for message () */
#include "../src/mem.h" /* for bcopy */
#include "../src/util.h" /* for unix_error_string */
#include "../src/mad.h"
int open_tcp_link (char *host, int *port, int *version, char *caller)
{
struct sockaddr_in server_address;
unsigned long inaddr;
struct hostent *hp;
int my_socket;
if (!*host)
return 0;
bzero ((char *) &server_address, sizeof (server_address));
server_address.sin_family = AF_INET;
/* Try to use the dotted decimal number */
if ((inaddr = inet_addr (host)) != -1)
bcopy ((char *) &inaddr, (char *) &server_address.sin_addr,
sizeof (inaddr));
else {
if ((hp = gethostbyname (host)) == NULL){
message_2s (1, caller, " Can't locate hostname: %s ", host);
return 0;
}
bcopy ((char *) hp->h_addr, (char *) &server_address.sin_addr,
hp->h_length);
}
/* Try to contact a remote portmapper to obtain the listening port */
if (*port == 0){
*port = get_remote_port (&server_address, version);
if (*port < 1)
return 0;
} else
*version = 1;
server_address.sin_port = htons (*port);
if ((my_socket = socket (AF_INET, SOCK_STREAM, 0)) < 0){
message_2s (1, caller, " Can't create socket: %s ",
unix_error_string(errno));
return 0;
}
if (connect (my_socket, (struct sockaddr *) &server_address,
sizeof (server_address)) < 0){
message_2s (1, caller, " Can't connect to server: %s ",
unix_error_string (errno));
close (my_socket);
return 0;
}
return my_socket;
}
#endif
/* Extract the hostname and username from the path */
/* path is in the form: [user@]hostname:port/remote-dir, e.g.:
*
* ftp://sunsite.unc.edu/pub/linux
* ftp://miguel@sphinx.nuclecu.unam.mx/c/nc
* ftp://tsx-11.mit.edu:8192/
* ftp://joe@foo.edu:11321/private
* ftp://joe:password@foo.se
*
* If the user is empty, e.g. ftp://@roxanne/private, then your login name
* is supplied.
*
* returns malloced host, user.
* returns a malloced strings with the pathname relative to the host.
* */
char *get_host_and_username (char *path, char **host, char **user, int *port,
int default_port, int default_is_anon, char **pass)
{
struct passwd *passwd_info;
char *dir, *colon, *inner_colon, *at, *rest;
char *retval;
char *pcopy = strdup (path);
char *pend = pcopy + strlen (pcopy);
*pass = NULL;
*port = default_port;
*user = NULL;
/* locate path component */
for (dir = pcopy; *dir != '/' && *dir; dir++)
;
if (*dir){
retval = strdup (dir);
*dir = 0;
} else
retval = strdup ("/");
/* search for any possible user */
at = strchr (pcopy, '@');
/* We have a username */
if (at){
*at = 0;
inner_colon = strchr (pcopy, ':');
if (inner_colon){
*inner_colon = 0;
inner_colon++;
if (*inner_colon == '@')
*pass = NULL;
else
*pass = strdup (inner_colon);
}
if (*pcopy != 0)
*user = strdup (pcopy);
else
default_is_anon = 0;
if (pend == at+1)
rest = at;
else
rest = at + 1;
} else
rest = pcopy;
if (!*user){
if (default_is_anon)
*user = strdup ("anonymous");
else {
if ((passwd_info = getpwuid (geteuid ())) == NULL)
*user = strdup ("anonymous");
else {
*user = strdup (passwd_info->pw_name);
}
endpwent ();
}
}
/* Check if the host comes with a port spec, if so, chop it */
colon = strchr (rest, ':');
if (colon){
*colon = 0;
if (sscanf(colon+1, "%d", port)==1) {
if (*port <= 0 || *port >= 65536)
*port = default_port;
} else {
while(1) {
colon++;
switch(*colon) {
case 'C': *port = 1;
break;
case 'r': *port = 2;
break;
case 0: goto done;
}
}
}
}
done:
*host = strdup (rest);
free (pcopy);
return retval;
}
#ifdef old_manual_get_host_and_username
char *get_host_and_username (char *path, char **host, char **user, int *port,
int default_port, int default_is_anon,
char **pass)
{
struct passwd *passwd_info;
char *p, *q;
*pass = NULL;
*port = default_port;
for (p = path; ((*p != '/') && (*p != ':')) && *p; p++)
;
q = strchr (path, '@');
if (q != NULL) {
if (q > p) {
*user = (char *) xmalloc (p - path + 1, "get_host_and_username");
strncpy (*user, path, p - path);
(*user) [p - path] = 0;
p++;
*pass = (char *) xmalloc (q - p + 1,"get_host_and_username");
strncpy (*pass, p, q - p);
(*pass) [q - p] = 0;
for (p++; ((*p != '/') && (*p != ':')) && *p; p++);
q++;
*host = (char *) xmalloc (p - q + 1, "get_host_and_username");
strncpy (*host, q, p - q);
(*host) [p-q] = 0;
} else {
if (q == path)
*user = NULL;
else {
*user = (char *) xmalloc (q - path + 1, "get_host_and_username");
strncpy (*user, path, q - path);
(*user) [q - path] = 0;
}
q++;
*host = (char *) xmalloc (p - q + 1, "get_host_and_username");
strncpy (*host, q, p - q);
(*host) [p-q] = 0;
}
} else {
*host = (char *) xmalloc (p - path + 1, "get_host_and_username");
strncpy (*host, path, p - path);
(*host) [p-path] = 0;
*user = NULL;
#ifdef USE_NETRC
if (use_netrc)
if (lookup_netrc (*host, user, pass) < 0) {
if (*user) { free (*user); *user = NULL; }
if (*pass) { free (*pass); *pass = NULL; }
}
#endif
if (*user == NULL && default_is_anon)
*user = strdup ("anonymous");
}
/* If we got a port spec ... */
if (*p == ':'){
q = ++p;
for (;*q != '/' && *q; q++)
;
if (!*q && q == p){
if (!(*user))
*user = strdup ("");
/* on return: *host and *user always malloced, *pass malloced
* or NULL */
return 0;
}
*port = atoi (p);
if (*port <= 0 || *port >= 65536)
*port = 21;
p = q;
}
if (!*user){
if ((passwd_info = getpwuid (geteuid ())) == NULL)
*user = strdup ("anonymous");
else {
*user = strdup (passwd_info->pw_name);
}
endpwent ();
}
if (p && *p)
return strdup (p);
else
return strdup ("/");
}
#endif
#ifdef test_get_host_and_username
struct tt {
char *url;
char *r_host;
char *r_user;
char *r_pass;
char *r_dir;
int r_port;
};
struct tt tests [] = {
{ "host", "host", "anonymous", NULL, "/", 21 },
{ "host/dir", "host", "anonymous", NULL, "/dir", 21 },
{ "host:40/", "host", "anonymous", NULL, "/", 40 },
{ "host:40/dir", "host", "anonymous", NULL, "/dir", 40 },
{ "user@host", "host", "user", NULL, "/", 21 },
{ "user@host/dir", "host", "user", NULL, "/dir", 21 },
{ "user@host:40/", "host", "user", NULL, "/", 40 },
{ "user@host:40/dir", "host", "user", NULL, "/dir", 40 },
{ "user:pass@host", "host", "user", "pass", "/", 21 },
{ "user:pass@host/dir", "host", "user", "pass", "/dir", 21 },
{ "user:pass@host:40", "host", "user", "pass", "/", 40 },
{ "user:pass@host:40/dir", "host", "user", "pass", "/dir", 40 },
{ "host/a@b", "host", "anonymous", NULL, "/a@b", 21 },
{ "host:40/a@b", "host", "anonymous", NULL, "/a@b", 40 },
{ "user@host/a@b", "host", "user", NULL, "/a@b", 21 },
{ "user@host:40/a@b", "host", "user", NULL, "/a@b", 40 },
{ "user:pass@host/a@b", "host", "user", "pass", "/a@b", 21 },
{ "user:pass@host:40/a@b", "host", "user", "pass", "/a@b", 40 },
{ "host/a:b", "host", "anonymous", NULL, "/a:b", 21 },
{ "host:40/a:b", "host", "anonymous", NULL, "/a:b", 40 },
{ "user@host/a:b", "host", "user", NULL, "/a:b", 21 },
{ "user@host:40/a:b", "host", "user", NULL, "/a:b", 40 },
{ "user:pass@host/a:b", "host", "user", "pass", "/a:b", 21 },
{ "user:pass@host:40/a:b", "host", "user", "pass", "/a:b", 40 },
{ "host/a/b", "host", "anonymous", NULL, "/a/b", 21 },
{ "host:40/a/b", "host", "anonymous", NULL, "/a/b", 40 },
{ "user@host/a/b", "host", "user", NULL, "/a/b", 21 },
{ "user@host:40/a/b", "host", "user", NULL, "/a/b", 40 },
{ "user:pass@host/a/b", "host", "user", "pass", "/a/b", 21 },
{ "user:pass@host:40/a/b", "host", "user", "pass", "/a/b", 40 },
{ NULL }
};
/* tests with implicit login name */
struct tt tests2 [] = {
{ "@host", "host", "user", NULL, "/", 21 },
{ "@host/dir", "host", "user", NULL, "/dir", 21 },
{ "@host:40/", "host", "user", NULL, "/", 40 },
{ "@host:40/dir", "host", "user", NULL, "/dir", 40 },
{ ":pass@host", "host", "user", "pass", "/", 21 },
{ ":pass@host/dir", "host", "user", "pass", "/dir", 21 },
{ ":pass@host:40", "host", "user", "pass", "/", 40 },
{ ":pass@host:40/dir", "host", "user", "pass", "/dir", 40 },
{ "@host/a@b", "host", "user", NULL, "/a@b", 21 },
{ "@host:40/a@b", "host", "user", NULL, "/a@b", 40 },
{ ":pass@host/a@b", "host", "user", "pass", "/a@b", 21 },
{ ":pass@host:40/a@b", "host", "user", "pass", "/a@b", 40 },
{ "@host/a:b", "host", "user", NULL, "/a:b", 21 },
{ "@host:40/a:b", "host", "user", NULL, "/a:b", 40 },
{ ":pass@host/a:b", "host", "user", "pass", "/a:b", 21 },
{ ":pass@host:40/a:b", "host", "user", "pass", "/a:b", 40 },
{ "@host/a/b", "host", "user", NULL, "/a/b", 21 },
{ "@host:40/a/b", "host", "user", NULL, "/a/b", 40 },
{ ":pass@host/a/b", "host", "user", "pass", "/a/b", 21 },
{ ":pass@host:40/a/b", "host", "user", "pass", "/a/b", 40 },
{ NULL }
};
main ()
{
int i, port, err;
char *dir, *host, *user, *pass;
struct passwd *passwd_info;
char *current;
if ((passwd_info = getpwuid (geteuid ())) == NULL)
current = strdup ("anonymous");
else {
current= strdup (passwd_info->pw_name);
}
endpwent ();
for (i = 0; tests [i].url; i++){
err = 0;
dir = get_host_and_username (tests [i].url, &host, &user, &port, 21, 1, &pass);
if (strcmp (dir, tests [i].r_dir))
err++, printf ("dir: test %d flunked\n", i);
if (!err && strcmp (host, tests [i].r_host))
err++, printf ("host: test %d flunked\n", i);
if (!err && strcmp (user, tests [i].r_user))
err++, printf ("user: test %d flunked\n", i);
if (!err && tests [i].r_pass)
if (strcmp (dir, tests [i].r_dir))
err++, printf ("pass: test %d flunked\n", i);
if (!err & tests [i].r_port != port)
err++, printf ("port: test %d flunked\n", i);
if (err){
printf ("host=[%s] user=[%s] pass=[%s] port=[%d]\n",
host, user, pass, port);
}
}
printf ("%d tests ok\nExtra tests:", i);
for (i = 0; i < 4; i++){
dir = get_host_and_username (tests [i].url, &host, &user, &port, 21, 0, &pass);
if (strcmp (user, current))
printf ("ntest: flunked %d\n", i);
}
printf ("%d tests ok\nTests with implicit login name\n", i);
for (i = 0; tests2 [i].url; i++){
err = 0;
dir = get_host_and_username (tests2 [i].url, &host, &user, &port, 21, 1, &pass);
if (strcmp (dir, tests2 [i].r_dir))
err++, printf ("dir: test %d flunked\n", i);
if (!err && strcmp (host, tests2 [i].r_host))
err++, printf ("host: test %d flunked\n", i);
if (!err && strcmp (user, current))
err++, printf ("user: test %d flunked\n", i);
if (!err && tests2 [i].r_pass)
if (strcmp (dir, tests2 [i].r_dir))
err++, printf ("pass: test %d flunked\n", i);
if (!err & tests2 [i].r_port != port)
err++, printf ("port: test %d flunked\n", i);
if (err){
printf ("host=[%s] user=[%s] pass=[%s] port=[%d]\n",
host, user, pass, port);
}
}
printf ("%d tests ok\n", i);
}
#endif
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