13704ca508
names suggest, they perform methods on Device's. In addition, they check that the pointer passed to them is valid; if it isn't, they pretend that the action failed. This fixes some crashes due to NULL dereferences (e.g., PR 26509). Approved by: jkh (some time ago)
283 lines
8.0 KiB
C
283 lines
8.0 KiB
C
/*
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* The new sysinstall program.
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*
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* This is probably the last attempt in the `sysinstall' line, the next
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* generation being slated to essentially a complete rewrite.
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*
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* $FreeBSD$
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*
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* Copyright (c) 1995
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* Jordan Hubbard. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* verbatim and that no modifications are made prior to this
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* point in the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JORDAN HUBBARD OR HIS PETS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "sysinstall.h"
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/param.h>
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#include <sys/wait.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <ftpio.h>
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Boolean ftpInitted = FALSE;
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static FILE *OpenConn;
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int FtpPort;
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/* List of sub directories to look for under a given FTP server. */
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const char *ftp_dirs[] = { ".", "releases/"MACHINE, "snapshots/"MACHINE,
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"pub/FreeBSD", "pub/FreeBSD/releases/"MACHINE,
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"pub/FreeBSD/snapshots/"MACHINE, NULL };
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/* Brings up attached network device, if any - takes FTP device as arg */
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static Boolean
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netUp(Device *dev)
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{
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Device *netdev = (Device *)dev->private;
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if (netdev)
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return DEVICE_INIT(netdev);
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else
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return TRUE; /* No net == happy net */
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}
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/* Brings down attached network device, if any - takes FTP device as arg */
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static void
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netDown(Device *dev)
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{
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Device *netdev = (Device *)dev->private;
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if (netdev)
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DEVICE_SHUTDOWN(netdev);
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}
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Boolean
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mediaInitFTP(Device *dev)
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{
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int i, code, af, fdir;
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char *cp, *rel, *hostname, *dir;
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char *user, *login_name, password[80];
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if (ftpInitted)
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return TRUE;
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if (OpenConn) {
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fclose(OpenConn);
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OpenConn = NULL;
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}
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/* If we can't initialize the network, bag it! */
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if (!netUp(dev))
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return FALSE;
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try:
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cp = variable_get(VAR_FTP_PATH);
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if (!cp) {
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if (DITEM_STATUS(mediaSetFTP(NULL)) == DITEM_FAILURE || (cp = variable_get(VAR_FTP_PATH)) == NULL) {
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msgConfirm("Unable to get proper FTP path. FTP media not initialized.");
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netDown(dev);
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return FALSE;
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}
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}
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hostname = variable_get(VAR_FTP_HOST);
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dir = variable_get(VAR_FTP_DIR);
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if (!hostname || !dir) {
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msgConfirm("Missing FTP host or directory specification. FTP media not initialized,");
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netDown(dev);
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return FALSE;
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}
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user = variable_get(VAR_FTP_USER);
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login_name = (!user || !*user) ? "anonymous" : user;
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if (variable_get(VAR_FTP_PASS))
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SAFE_STRCPY(password, variable_get(VAR_FTP_PASS));
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else if (RunningAsInit)
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sprintf(password, "installer@%s", variable_get(VAR_HOSTNAME));
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else {
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struct passwd *pw;
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char *user;
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pw = getpwuid(getuid());
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user = pw ? pw->pw_name : "ftp";
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sprintf(password, "%s@%s", user, variable_get(VAR_HOSTNAME));
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}
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af = variable_cmp(VAR_IPV6_ENABLE, "YES") ? AF_INET : AF_UNSPEC;
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msgNotify("Logging in to %s@%s..", login_name, hostname);
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if ((OpenConn = ftpLoginAf(hostname, af, login_name, password, FtpPort, isDebug(), &code)) == NULL) {
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msgConfirm("Couldn't open FTP connection to %s:\n %s.", hostname, ftpErrString(code));
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goto punt;
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}
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ftpPassive(OpenConn, !strcmp(variable_get(VAR_FTP_STATE), "passive"));
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ftpBinary(OpenConn);
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if (dir && *dir != '\0') {
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if ((i = ftpChdir(OpenConn, dir)) != 0) {
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if (i == 550)
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msgConfirm("No such directory ftp://%s/%s\n"
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"please check your URL and try again.", hostname, dir);
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else
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msgConfirm("FTP chdir to ftp://%s/%s returned error status:\n %s.", hostname, dir, ftpErrString(i));
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goto punt;
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}
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}
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/*
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* Now that we've verified that the path we're given is ok, let's try to
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* be a bit intelligent in locating the release we are looking for. First
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* off, if the release is specified as "__RELEASE" or "any", then just
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* assume that the current directory is the one we want and give up.
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*/
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rel = variable_get(VAR_RELNAME);
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if (strcmp(rel, "__RELEASE") && strcmp(rel, "any")) {
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/*
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* Ok, since we have a release variable, let's walk through the list
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* of directories looking for a release directory. The first one to
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* match wins. For each case, we chdir to ftp_dirs[fdir] first. If
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* that fails, we skip to the next one. Otherwise, we try to chdir to
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* rel. If it succeeds we break out. If it fails, then we go back to
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* the base directory and try again. Lots of chdirs, but oh well. :)
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*/
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for (fdir = 0; ftp_dirs[fdir]; fdir++) {
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/* Avoid sending CWD . commands which confuse some ftp servers */
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if (strcmp(ftp_dirs[fdir], ".") &&
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(ftpChdir(OpenConn, (char *)ftp_dirs[fdir]) != 0))
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continue;
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if (ftpChdir(OpenConn, rel) == 0) {
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ftpInitted = TRUE;
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return TRUE;
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}
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else /* reset to "root" dir for a fresh try */
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ftpChdir(OpenConn, "/");
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}
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/*
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* If we get here, then all of the directories we tried failed, so
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* print out the error message and ask the user if they want to try
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* again.
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*/
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if (!msgYesNo("Warning: Can't find the `%s' distribution on this\n"
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"FTP server. You may need to visit a different server for\n"
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"the release you are trying to fetch or go to the Options\n"
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"menu and to set the release name to explicitly match what's\n"
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"available on %s (or set to \"any\").\n\n"
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"Would you like to select another FTP server?",
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rel, hostname)) {
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variable_unset(VAR_FTP_PATH);
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if (DITEM_STATUS(mediaSetFTP(NULL)) != DITEM_FAILURE)
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goto try;
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}
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} else {
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ftpInitted = TRUE;
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return TRUE;
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}
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punt:
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ftpInitted = FALSE;
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if (OpenConn != NULL) {
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fclose(OpenConn);
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OpenConn = NULL;
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}
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netDown(dev);
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variable_unset(VAR_FTP_PATH);
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return FALSE;
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}
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FILE *
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mediaGetFTP(Device *dev, char *file, Boolean probe)
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{
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int nretries = 1;
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FILE *fp;
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char *try, buf[PATH_MAX];
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if (!OpenConn) {
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msgDebug("No FTP connection open, can't get file %s\n", file);
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return NULL;
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}
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try = file;
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while ((fp = ftpGet(OpenConn, try, 0)) == NULL) {
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int ftperr = ftpErrno(OpenConn);
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/* If a hard fail, try to "bounce" the ftp server to clear it */
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if (ftperr != 550) {
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if (ftperr != 421) /* Timeout? */
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variable_unset(VAR_FTP_PATH);
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/* If we can't re-initialize, just forget it */
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DEVICE_SHUTDOWN(dev);
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if (!DEVICE_INIT(dev)) {
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netDown(dev);
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if (OpenConn) {
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fclose(OpenConn);
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OpenConn = NULL;
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}
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variable_unset(VAR_FTP_PATH);
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return NULL;
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}
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}
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else if (probe)
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return NULL;
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else {
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/* Try some alternatives */
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switch (nretries++) {
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case 1:
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sprintf(buf, "releases/%s", file);
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try = buf;
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break;
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case 2:
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sprintf(buf, "%s/%s", variable_get(VAR_RELNAME), file);
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try = buf;
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break;
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case 3:
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sprintf(buf, "%s/releases/%s", variable_get(VAR_RELNAME), file);
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try = buf;
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break;
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case 4:
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try = file;
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break;
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}
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}
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}
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return fp;
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}
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void
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mediaShutdownFTP(Device *dev)
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{
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if (!ftpInitted)
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return;
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if (OpenConn != NULL) {
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fclose(OpenConn);
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OpenConn = NULL;
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}
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ftpInitted = FALSE;
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}
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