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|
/* $NetBSD: ftpio.c,v 1.26 2008/01/29 15:39:31 hubertf Exp $ */
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <nbcompat.h>
#if HAVE_SYS_CDEFS_H
#include <sys/cdefs.h>
#endif
#ifndef lint
__RCSID("$NetBSD: ftpio.c,v 1.26 2008/01/29 15:39:31 hubertf Exp $");
#endif
/*-
* Copyright (c) 1999-2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Hubert Feyrer <hubert@feyrer.de> and Thomas Klausner.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_POLL_H
#include <sys/poll.h>
#endif
#if HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#if HAVE_SIGNAL_H
#include <signal.h>
#endif
#if HAVE_ASSERT_H
#include <assert.h>
#endif
#if HAVE_CTYPE_H
#include <ctype.h>
#endif
#if HAVE_ERR_H
#include <err.h>
#endif
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_NETDB_H
#include <netdb.h>
#endif
#if HAVE_REGEX_H
#include <regex.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_STDIO_H
#include <stdio.h>
#endif
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_TERMCAP_H
#include <termcap.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "../lib/lib.h"
/*
* Names of environment variables used to pass things to
* subprocesses, for connection caching.
*/
#define PKG_FTPIO_COMMAND "PKG_FTPIO_COMMAND"
#define PKG_FTPIO_ANSWER "PKG_FTPIO_ANSWER"
#define PKG_FTPIO_CNT "PKG_FTPIO_CNT"
#define PKG_FTPIO_CURRENTHOST "PKG_FTPIO_CURRENTHOST"
#define PKG_FTPIO_CURRENTDIR "PKG_FTPIO_CURRENTDIR"
#undef STANDALONE /* define for standalone debugging */
/* File descriptors */
typedef struct {
int command;
int answer;
} fds;
static int needclose=0;
static int ftp_started=0;
static fds ftpio;
static int ftp_pid;
static char term[1024];
static char bold_on[1024];
static char bold_off[1024];
static char *ftp_expand_URL(const char *, char *);
static int hexvalue(char);
static char *http_expand_URL(const char *, char *);
static int http_extract_fn(char *, char *, size_t);
static void URL_decode(char *);
/*
* expect "str" (a regular expression) on file descriptor "fd", storing
* the FTP return code of the command in the integer "ftprc". The "str"
* string is expected to match some FTP return codes after a '\n', e.g.
* "\n(550|226).*\n"
*/
static int
expect(int fd, const char *str, int *ftprc)
{
int rc;
char buf[256];
regex_t rstr;
int done;
struct pollfd set[1];
int retval;
regmatch_t match;
int verbose_expect=0;
if (regcomp(&rstr, str, REG_EXTENDED) != 0)
err(EXIT_FAILURE, "expect: regcomp() failed");
memset(buf, '\n', sizeof(buf));
done=0;
retval=0;
set[0].fd = fd;
set[0].events = POLLIN;
while(!done) {
rc = poll(set, 1, 60*60*1000); /* seconds until next message from tar */
switch (rc) {
case -1:
if (errno == EINTR)
break;
warn("expect: poll() failed (probably ftp died because of bad args)");
done = 1;
retval = -1;
break;
case 0:
warnx("expect: poll() timeout");
/* need to send ftp coprocess SIGINT to make it stop
* downloading into dir that we'll blow away in a second */
kill(ftp_pid, SIGINT);
/* Wait until ftp coprocess is responsive again
* XXX Entering recursion here!
*/
rc = ftp_cmd("cd .\n", "\n(550|250).*\n");
if (rc != 250) {
/* now we have a really good reason to bail out ;) */
}
/* ftp is at command prompt again, and will wait for our
* next command. If we were downloading, we can now safely
* continue and remove the dir that the tar command was
* expanding to */
done = 1; /* hope that's ok */
retval = -1;
break;
default:
if (set[0].revents & POLLHUP) {
done = 1;
retval = -1;
break;
}
rc = read(fd, &buf[sizeof(buf) - 1], 1);
if (rc <= 0) {
done = 1;
retval = -1;
break;
}
if (verbose_expect)
putchar(buf[sizeof(buf)-1]);
if (regexec(&rstr, buf, 1, &match, 0) == 0) {
if (ftprc && isdigit((unsigned char)buf[match.rm_so+1]))
*ftprc = atoi(buf+match.rm_so+1);
done=1;
retval=0;
}
memmove(buf, buf+1, sizeof(buf)-1); /* yes, this is non-performant */
break;
}
}
return retval;
}
/*
* send a certain ftp-command "cmd" to our FTP coprocess, and wait for
* "expectstr" to be returned. Return numeric FTP return code or -1
* in case of an error (usually expect() timeout)
*/
int
ftp_cmd(const char *cmd, const char *expectstr)
{
int rc=0, verbose_ftp=0;
int len;
if (Verbose)
verbose_ftp=1;
if (verbose_ftp)
fprintf(stderr, "\n%sftp> %s%s", bold_on, cmd, bold_off);
fflush(stdout);
len = write(ftpio.command, cmd, strlen(cmd));
if (len == strlen(cmd)) {
if (expectstr) {
/* set "rc" to the FTP error code: */
if (expect(ftpio.answer, expectstr, &rc) == -1)
rc = -1; /* some error occurred */
}
} else {
if (Verbose)
warn("short write");
}
return rc;
}
/*
* Really fire up FTP coprocess
*/
static int
setupCoproc(const char *base)
{
int command_pipe[2];
int answer_pipe[2];
int rc1, rc2;
char buf[20];
char *argv0 = (char *)strrchr(FTP_CMD, '/');
if (argv0 == NULL)
argv0 = FTP_CMD;
else
argv0++;
rc1 = pipe(command_pipe);
rc2 = pipe(answer_pipe);
if(rc1==-1 || rc2==-1) {
warn("setupCoproc: pipe() failed");
return -1;
}
if (command_pipe[0] == -1 || command_pipe[1] == -1 ||
answer_pipe[0] == -1 || answer_pipe[1] == -1 ) {
warn("setupCoproc: pipe() returned bogus descriptor");
return -1;
}
rc1 = fork();
switch (rc1) {
case -1:
/* Error */
warn("setupCoproc: fork() failed");
return -1;
break;
case 0:
/* Child */
(void) close(command_pipe[1]);
rc1 = dup2(command_pipe[0], 0);
if (rc1 == -1) {
err(EXIT_FAILURE, "setupCoproc: dup2 failed (command_pipe[0])");
}
(void) close(command_pipe[0]);
(void) close(answer_pipe[0]);
rc1 = dup2(answer_pipe[1], 1);
if (rc1 == -1) {
err(EXIT_FAILURE, "setupCoproc: dup2 failed (answer_pipe[1])");
}
(void) close(answer_pipe[1]);
setbuf(stdout, NULL);
if (Verbose)
fprintf(stderr, "%sftp -detv %s%s\n", bold_on, base, bold_off);
rc1 = execlp(FTP_CMD, argv0, "-detv", base, NULL);
warn("setupCoproc: execlp() failed");
exit(1);
break;
default:
/* Parent */
(void) close(command_pipe[0]);
(void) close(answer_pipe[1]);
(void) snprintf(buf, sizeof(buf), "%d", command_pipe[1]);
setenv(PKG_FTPIO_COMMAND, buf, 1);
(void) snprintf(buf, sizeof(buf), "%d", answer_pipe[0]);
setenv(PKG_FTPIO_ANSWER, buf, 1);
ftpio.command = command_pipe[1];
ftpio.answer = answer_pipe[0];
ftp_pid = rc1; /* to ^C transfers */
fcntl(ftpio.command, F_SETFL, O_NONBLOCK);
fcntl(ftpio.answer , F_SETFL, O_NONBLOCK);
break;
}
return 0;
}
/*
* Dummy signal handler to detect if the ftp(1) coprocess or
* and of the processes of the tar/gzip pipeline dies.
*/
static void
sigchld_handler (int n)
{
/* Make poll(2) return EINTR */
}
/*
* SIGPIPE only happens when there's something wrong with the FTP
* coprocess. In that case, set mark to not try to close shut down
* the coprocess.
*/
static void
sigpipe_handler(int n)
{
/* aparently our ftp companion died */
if (Verbose)
fprintf(stderr, "SIGPIPE!\n");
needclose = 0;
}
/*
* Close the FTP coprocess' current connection, but
* keep the process itself alive.
*/
void
ftp_stop(void)
{
#if defined(__svr4__) && defined(__sun__)
char env[BUFSIZ];
#endif
const char *tmp1, *tmp2;
if (!ftp_started)
return;
tmp1=getenv(PKG_FTPIO_COMMAND);
tmp2=getenv(PKG_FTPIO_ANSWER);
/* (Only) the last one closes the link */
if (tmp1 != NULL && tmp2 != NULL) {
if (needclose)
ftp_cmd("close\n", "\n(221 .*|Not connected.)\n");
(void) close(ftpio.command);
(void) close(ftpio.answer);
}
#if defined(__svr4__) && defined(__sun__)
(void) snprintf(env, sizeof(env), "%s=", PKG_FTPIO_COMMAND);
putenv(env);
(void) snprintf(env, sizeof(env), "%s=", PKG_FTPIO_ANSWER);
putenv(env);
#else
unsetenv(PKG_FTPIO_COMMAND);
unsetenv(PKG_FTPIO_ANSWER);
#endif
}
/*
* (Start and re-)Connect the FTP coprocess to some host/dir.
* If the requested host/dir is different than the one that the
* coprocess is currently at, close first.
*/
int
ftp_start(const char *base)
{
const char *tmp1, *tmp2;
char *p;
int rc;
char newHost[MAXHOSTNAMELEN];
const char *newDir;
const char *currentHost=getenv(PKG_FTPIO_CURRENTHOST);
const char *currentDir=getenv(PKG_FTPIO_CURRENTDIR);
int urllen;
/* talk to termcap for bold on/off escape sequences */
if (getenv("TERM") != NULL && tgetent(term, getenv("TERM")) > 0) {
p = bold_on; tgetstr("md", &p);
p = bold_off; tgetstr("me", &p);
} else {
bold_on[0] = '\0';
bold_off[0] = '\0';
}
fileURLHost(base, newHost, sizeof(newHost));
urllen = URLlength(base);
if (urllen < 0 || !(newDir = strchr(base + URLlength(base), '/')))
errx(EXIT_FAILURE, "ftp_start: bad URL '%s'", base);
newDir++;
if (currentHost
&& currentDir
&& ( strcmp(newHost, currentHost) != 0
|| strcmp(newDir, currentDir) != 0)) { /* could handle new dir case better here, w/o reconnect */
if (Verbose) {
printf("ftp_start: new host or dir, stopping previous connect...\n");
printf("currentHost='%s', newHost='%s'\n", currentHost, newHost);
printf("currentDir='%s', newDir='%s'\n", currentDir, newDir);
}
ftp_stop();
if (Verbose)
printf("ftp stopped\n");
}
setenv(PKG_FTPIO_CURRENTHOST, newHost, 1); /* need to update this in the environment */
setenv(PKG_FTPIO_CURRENTDIR, newDir, 1); /* for subprocesses to have this available */
tmp1=getenv(PKG_FTPIO_COMMAND);
tmp2=getenv(PKG_FTPIO_ANSWER);
if(tmp1==NULL || tmp2==NULL || *tmp1=='\0' || *tmp2=='\0') {
/* no FTP coprocess running yet */
if (Verbose)
printf("Spawning FTP coprocess\n");
rc = setupCoproc(base);
if (rc == -1) {
warnx("setupCoproc() failed");
return -1;
}
needclose=1;
signal(SIGPIPE, sigpipe_handler);
signal(SIGCHLD, sigchld_handler);
if ((expect(ftpio.answer, "\n(221|250|221|550).*\n", &rc) != 0)
|| rc != 250) {
warnx("expect1 failed, rc=%d", rc);
return -1;
}
/* nbftp now issues a CWD for each part of the path
* and will return a code for each of them. No idea how to
* deal with that other than to issue a 'prompt off' to
* get something that we can wait for and that does NOT
* look like a CWD command's output */
rc = ftp_cmd("prompt off\n", "\n(Interactive mode off|221).*\n");
if ((rc == 221) || (rc == -1)) {
/* something is wrong */
ftp_started=1; /* not really, but for ftp_stop() */
ftp_stop();
warnx("prompt failed - wrong dir?");
return -1;
}
ftp_started=1;
} else {
/* get FDs of our coprocess */
ftpio.command = dup(atoi(tmp1));
if (ftpio.command == -1 ) {
warnx("command dup() failed, increase 'descriptors' limit");
return -1;
}
ftpio.answer = dup(atoi(tmp2));
if (ftpio.answer == -1 ) {
warnx("answer dup() failed, increase 'descriptors' limit");
return -1;
}
if (Verbose)
printf("Reusing FDs %s/%s for communication to FTP coprocess\n", tmp1, tmp2);
fcntl(ftpio.command, F_SETFL, O_NONBLOCK);
fcntl(ftpio.answer , F_SETFL, O_NONBLOCK);
}
return 0;
}
/*
* Expand the given wildcard URL "wildcardurl" if possible, and store the
* expanded value into "expandedurl". return 0 if successful, -1 else.
*/
int
expandURL(char *expandedurl, const char *wildcardurl)
{
char *pattern;
char *bestmatch;
char base[MaxPathSize];
pattern=strrchr(wildcardurl, '/');
if (pattern == NULL){
warnx("expandURL: no '/' in URL %s?!", wildcardurl);
return -1;
}
if (pattern-strchr(wildcardurl, '/') < 2) {
/* only one or two slashes in total */
warnx("expandURL: not enough '/' in URL %s", wildcardurl);
return -1;
}
(void) snprintf(base, sizeof(base), "%.*s/",
(int)(pattern-wildcardurl), wildcardurl);
pattern++;
if (strncmp(wildcardurl, "ftp://", 6) == 0)
bestmatch=ftp_expand_URL(base, pattern);
else if (strncmp(wildcardurl, "http://", 7) == 0)
bestmatch=http_expand_URL(base, pattern);
else {
warnx("expandURL: unknown protocol in URL `%s'", wildcardurl);
return -1;
}
/* no match found */
if (bestmatch == NULL)
return -1;
snprintf(expandedurl, MaxPathSize, "%s%s", base, bestmatch);
if (Verbose)
printf("best match: '%s'\n", expandedurl);
return 0;
}
/* for a given wildcard ftp:// URL, find the best matching pkg */
static char *
ftp_expand_URL(const char *base, char *pattern)
{
char *s, buf[MaxPathSize];
char tmpname[MaxPathSize];
char best[MaxPathSize];
char s_best[MaxPathSize];
int rc, got_list, tfd, retry_tbz;
retry_tbz = 0;
best[0]='\0';
s_best[0]='\0';
rc = ftp_start(base);
if (rc == -1) {
warnx("ftp_start() failed");
return NULL;
}
strlcpy(tmpname, "/var/tmp/pkg.XXXXXX", sizeof(tmpname));
tfd=mkstemp(tmpname);
if (tfd == -1) {
warnx("Cannot generate temp file for ftp(1)'s nlist output");
return NULL;
}
close(tfd); /* We don't need the file descriptor, but will use
the file in a second */
s=strpbrk(pattern, "<>[]?*{"); /* Could leave out "[]?*" here;
* ftp(1) is not that stupid */
if (!s) {
/* This should only happen when getting here with (only) a package
* name specified to pkg_add, and PKG_PATH containing some URL.
*/
(void) snprintf(buf, sizeof(buf), "nlist %s %s\n", pattern, tmpname);
} else {
/* replace possible version(wildcard) given with "-*".
* we can't use the pkg wildcards here as dewey compare
* and alternates won't be handled by ftp(1); sort
* out later, using pkg_match() */
if (retry_tbz) {
retry_with_tbz:
(void) snprintf(buf, sizeof(buf), "nlist %.*s*.tbz %s\n",
(int)(s-pattern), pattern, tmpname);
retry_tbz = 0;
} else {
(void) snprintf(buf, sizeof(buf), "nlist %.*s*.tgz %s\n",
(int)(s-pattern), pattern, tmpname);
retry_tbz = 1;
}
}
rc = ftp_cmd(buf, "\n(550|450|226).*\n"); /* catch errors */
if (rc != 226)
got_list = 0;
else
got_list = 1;
/* Sync - don't remove */
rc = ftp_cmd("cd .\n", "\n(550|250|257).*\n");
if (rc != 250) {
warnx("chdir failed!");
unlink(tmpname); /* remove clutter */
return NULL;
}
if (got_list == 1 && access(tmpname, R_OK)==0) {
FILE *f;
char filename[MaxPathSize];
f=fopen(tmpname, "r");
if (f == NULL) {
warn("fopen");
unlink(tmpname); /* remove clutter */
return NULL;
}
/* The following loop is basically the same as the readdir() loop
* in findmatchingname() */
while (fgets(filename, sizeof(filename), f)) {
/*
* We need to strip off any .t[bg]z etc.
* suffix here
*/
char s_filename[MaxPathSize];
char s_pattern[MaxPathSize];
filename[strlen(filename)-1] = '\0';
strip_txz(s_filename, NULL, filename);
strip_txz(s_pattern, NULL, pattern);
if (pkg_order(s_pattern, s_filename,
s_best[0] != '\0' ? s_best : NULL) == 1) {
strlcpy(s_best, s_filename, sizeof(s_best));
strlcpy(best, filename, sizeof(best));
}
}
(void) fclose(f);
}
if (retry_tbz)
goto retry_with_tbz;
if (best[0] == '\0' && Verbose)
warnx("nothing appropriate found");
unlink(tmpname);
if (best[0] == '\0')
return NULL;
return strdup(best);
}
/* for a given wildcard http:// URL, find the best matching pkg */
static char *
http_expand_URL(const char *base, char *pattern)
{
char best[MaxPathSize];
char s_best[MaxPathSize];
char line[BUFSIZ];
char filename[MaxPathSize];
FILE *fp;
int pipefds[2];
int state;
pid_t pid;
*best = '\0';
*s_best = '\0';
/* Set up a pipe for getting the file list */
if (pipe(pipefds) == -1) {
warnx("cannot create pipe");
return NULL;
}
if ((pid = fork()) == -1) {
warnx("cannot fork ftp process");
return NULL;
}
if (pid == 0) { /* The child */
if (dup2(pipefds[1], STDOUT_FILENO) == -1) {
warnx("dup2 failed before starting ftp");
_exit(2);
}
close(pipefds[0]);
close(pipefds[1]);
/* get URL contents to stdout and thus to parent,
* silently */
execlp("ftp", "ftp", "-V", "-o", "-", base, NULL);
warnx("failed to execute ftp");
_exit(2);
}
/* parent */
close(pipefds[1]);
if ((fp=fdopen(pipefds[0], "r")) == NULL)
warn("can't fdopen pipe end");
else {
char s_pattern[MaxPathSize];
int len, offset;
/* strip of .t[bg]z for comparison */
strip_txz(s_pattern, NULL, pattern);
/* initialize http_extract_fn internal state */
http_extract_fn(NULL, NULL, 0);
/* read line from HTTP output and extract filenames */
while (fgets(line, sizeof(line), fp) != NULL) {
len = offset = 0;
while ((len=http_extract_fn(line+offset, filename,
sizeof(filename))) > 0) {
char s_filename[MaxPathSize];
offset += len;
strip_txz(s_filename, NULL, filename);
if (pkg_order(s_pattern, s_filename,
*s_best != '\0' ? s_best : NULL) == 1) {
strlcpy(best, filename, sizeof(best));
strlcpy(s_best, s_filename, sizeof(best));
}
}
}
}
fclose(fp);
/* wait for child to exit */
if (waitpid(pid, &state, 0) < 0) {
/* error has been reported by child */
return NULL;
}
if (best[0] == '\0') {
if (Verbose)
warnx("nothing appropriate found");
return NULL;
}
return strdup(best);
}
enum http_states {
ST_NONE,
ST_LT, ST_LTA, ST_TAGA, ST_H, ST_R, ST_E, ST_F, ST_HREF,
ST_TAG, ST_TAGAX
};
/* return any hrefs found */
static int
http_extract_fn(char *input, char *outbuf, size_t outbuflen)
{
/* partial copied hrefs from previous calls are saved here */
static char tempbuf[MaxPathSize];
/* fill state of tempbuf */
static int tempbuffill = 0;
/* parsing state information */
static enum http_states state;
/* currently in double quotes (in parsing) */
static int dqflag;
char p;
int offset, found;
if (outbuf == NULL) {
/* init */
dqflag = tempbuffill = 0;
state = ST_NONE;
return 0;
}
offset = 0;
found = 0;
while ((p=input[offset++]) != '\0') {
/* handle anything that's inside double quotes */
if (dqflag) {
/* incomplete href */
if (state == ST_HREF) {
/* check if space left in output
* buffer */
if (tempbuffill >= sizeof(tempbuf)) {
warnx("href starting with `%.*s'"
" too long", 60, tempbuf);
/* ignore remainder */
tempbuffill = 0;
/* need space before "href"
* can start again (invalidly,
* of course, but we don't
* care) */
state = ST_TAGAX;
}
/* href complete */
if (p == '\"') {
/* complete */
dqflag = 0;
tempbuf[tempbuffill++] = '\0';
/* need space before "href"
* can start again (invalidly,
* of course, but we don't
* care) */
state = ST_TAGAX;
found = 1;
break;
} else {
/* copy one more char */
tempbuf[tempbuffill++] = p;
}
} else {
/* leaving double quotes */
if (p == '\"')
dqflag = 0;
}
continue;
}
/*
* entering double quotes? (only relevant inside a tag)
*/
if (state != ST_NONE && p == '\"') {
dqflag = 1;
continue;
}
/* other cases */
switch (state) {
case ST_NONE:
/* plain text, not in markup */
if (p == '<')
state = ST_LT;
break;
case ST_LT:
/* in tag -- "<" already found */
if (p == '>')
state = ST_NONE;
else if (p == 'a' || p == 'A')
state = ST_LTA;
else if (!isspace((unsigned char)p))
state = ST_TAG;
break;
case ST_LTA:
/* in tag -- "<a" already found */
if (p == '>')
state = ST_NONE;
else if (isspace((unsigned char)p))
state = ST_TAGA;
else
state = ST_TAG;
break;
case ST_TAG:
/* in tag, but not "<a" -- disregard */
if (p == '>')
state = ST_NONE;
break;
case ST_TAGA:
/* in a-tag -- "<a " already found */
if (p == '>')
state = ST_NONE;
else if (p == 'h' || p == 'H')
state = ST_H;
else if (!isspace((unsigned char)p))
state = ST_TAGAX;
break;
case ST_TAGAX:
/* in unknown keyword in a-tag */
if (p == '>')
state = ST_NONE;
else if (isspace((unsigned char)p))
state = ST_TAGA;
break;
case ST_H:
/* in a-tag -- "<a h" already found */
if (p == '>')
state = ST_NONE;
else if (p == 'r' || p == 'R')
state = ST_R;
else if (isspace((unsigned char)p))
state = ST_TAGA;
else
state = ST_TAGAX;
break;
case ST_R:
/* in a-tag -- "<a hr" already found */
if (p == '>')
state = ST_NONE;
else if (p == 'e' || p == 'E')
state = ST_E;
else if (isspace((unsigned char)p))
state = ST_TAGA;
else
state = ST_TAGAX;
break;
case ST_E:
/* in a-tag -- "<a hre" already found */
if (p == '>')
state = ST_NONE;
else if (p == 'f' || p == 'F')
state = ST_F;
else if (isspace((unsigned char)p))
state = ST_TAGA;
else
state = ST_TAGAX;
break;
case ST_F:
/* in a-tag -- "<a href" already found */
if (p == '>')
state = ST_NONE;
else if (p == '=')
state = ST_HREF;
else if (!isspace((unsigned char)p))
state = ST_TAGAX;
break;
case ST_HREF:
/* in a-tag -- "<a href=" already found */
/* XXX: handle missing double quotes? */
if (p == '>')
state = ST_NONE;
/* skip spaces before URL */
else if (!isspace((unsigned char)p))
state = ST_TAGA;
break;
/* no default case by purpose */
}
}
if (p == '\0')
return -1;
if (found) {
char *q;
URL_decode(tempbuf);
/* strip path (XXX) */
if ((q=strrchr(tempbuf, '/')) == NULL)
q = tempbuf;
(void)strlcpy(outbuf, q, outbuflen);
tempbuffill = 0;
}
return offset;
}
static int
hexvalue(char p)
{
if (p >= '0' && p <= '9')
return (p-'0');
else if (p >= 'a' && p <= 'f')
return (p-'a'+10);
else if (p >= 'A' && p <= 'F')
return (p-'A'+10);
else
return -1;
}
/* fetch and extract URL url into directory path */
static int
http_fetch(const char *url, const char *path)
{
int pipefds[2];
int stateftp, state;
pid_t pidftp, pid;
/* Set up a pipe for passing the fetched contents. */
if (pipe(pipefds) == -1) {
warn("cannot create pipe");
return -1;
}
/* fork ftp child */
if ((pidftp = fork()) == -1) {
warn("cannot fork process for ftp");
return -1;
}
if (pidftp == 0) {
/* child */
if (dup2(pipefds[1], STDOUT_FILENO) == -1) {
warn("dup2 failed before executing ftp");
_exit(2);
}
close(pipefds[0]);
close(pipefds[1]);
execlp(FTP_CMD, FTP_CMD, "-o", "-", url, NULL);
warnx("failed to execute ftp");
_exit(2);
}
/* fork unpack child */
if ((pid = fork()) == -1) {
warn("cannot fork unpack process");
return -1;
}
if (pid == 0) {
/* child */
if (dup2(pipefds[0], STDIN_FILENO) == -1) {
warn("dup2 failed before unpack");
_exit(2);
}
close(pipefds[0]);
close(pipefds[1]);
if ((path != NULL) && (chdir(path) < 0))
_exit(127);
if (unpack("-", NULL) != 0) {
warnx("unpack failed");
_exit(2);
}
_exit(0);
}
close(pipefds[0]);
close(pipefds[1]);
/* wait for unpack to exit */
while (waitpid(pid, &state, 0) < 0) {
if (errno != EINTR) {
(void)waitpid(pidftp, &stateftp, 0);
return -1;
}
}
while (waitpid(pidftp, &stateftp, 0) < 0) {
if (errno != EINTR) {
return -1;
}
}
if (!WIFEXITED(state) || !WIFEXITED(stateftp))
return -1;
if (WEXITSTATUS(state) != 0 || WEXITSTATUS(stateftp) != 0)
return -1;
return 0;
}
static void
URL_decode(char *URL)
{
char *in, *out;
in = out = URL;
while (*in != '\0') {
if (in[0] == '%' && in[1] != '\0' && in[2] != '\0') {
/* URL-decode character */
if (hexvalue(in[1]) != -1 && hexvalue(in[2]) != -1) {
*out++ = hexvalue(in[1])*16+hexvalue(in[2]);
}
/* skip invalid encoded signs too */
in += 3;
}
else
*out++ = *in++;
}
*out = '\0';
return;
}
/*
* extract the given (expanded) URL "url" to the given directory "dir"
* return -1 on error, 0 else;
*/
int
unpackURL(const char *url, const char *dir)
{
char *pkg;
int rc;
char base[MaxPathSize];
char pkg_path[MaxPathSize];
{
/* Verify if the URL is really ok */
char expnd[MaxPathSize];
rc=expandURL(expnd, url);
if (rc == -1) {
warnx("unpackURL: verification expandURL failed");
return -1;
}
if (strcmp(expnd, url) != 0) {
warnx("unpackURL: verification expandURL failed, '%s'!='%s'",
expnd, url);
return -1;
}
}
pkg=strrchr(url, '/');
if (pkg == NULL){
warnx("unpackURL: no '/' in URL %s?!", url);
return -1;
}
(void) snprintf(base, sizeof(base), "%.*s/", (int)(pkg-url), url);
(void) snprintf(pkg_path, sizeof(pkg_path), "%.*s",
(int)(pkg-url), url); /* no trailing '/' */
pkg++;
/* Leave a hint for any depending pkgs that may need it */
if (getenv("PKG_PATH") == NULL) {
setenv("PKG_PATH", pkg_path, 1);
#if 0
path_create(pkg_path); /* XXX */
#endif
if (Verbose)
printf("setenv PKG_PATH='%s'\n", pkg_path);
}
if (strncmp(url, "http://", 7) == 0)
return http_fetch(url, dir);
rc = ftp_start(base);
if (rc == -1) {
warnx("ftp_start() failed");
return -1; /* error */
}
{
char cmd[1024];
const char *decompress_cmd = NULL;
const char *suf;
if (Verbose)
printf("unpackURL '%s' to '%s'\n", url, dir);
suf = suffix_of(pkg);
if (!strcmp(suf, "tbz") || !strcmp(suf, "bz2"))
decompress_cmd = BZIP2_CMD;
else if (!strcmp(suf, "tgz") || !strcmp(suf, "gz"))
decompress_cmd = GZIP_CMD;
else if (!strcmp(suf, "tar"))
; /* do nothing */
else
errx(EXIT_FAILURE, "don't know how to decompress %s, sorry", pkg);
/* yes, this is gross, but needed for borken ftp(1) */
(void) snprintf(cmd, sizeof(cmd), "get %s \"| ( cd %s; " TAR_CMD " %s %s -vvxp -f - | tee %s )\"\n",
pkg, dir,
decompress_cmd != NULL ? "--use-compress-program" : "",
decompress_cmd != NULL ? decompress_cmd : "",
Verbose ? "/dev/stderr" : "/dev/null");
rc = ftp_cmd(cmd, "\n(226|550).*\n");
if (rc != 226) {
warnx("Cannot fetch file (%d!=226)!", rc);
return -1;
}
}
return 0;
}
#ifdef STANDALONE
static void
usage(void)
{
errx(EXIT_FAILURE, "Usage: foo [-v] ftp://-pattern");
}
int
main(int argc, char *argv[])
{
int rc, ch;
char *argv0 = argv[0];
while ((ch = getopt(argc, argv, "v")) != -1) {
switch (ch) {
case 'v':
Verbose=1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc<1)
usage();
while(argv[0] != NULL) {
char newurl[MaxPathSize];
printf("Expand %s:\n", argv[0]);
rc = expandURL(newurl, argv[0]);
if (rc==-1)
warnx("Cannot expand %s", argv[0]);
else
printf("Expanded URL: %s\n", newurl);
/* test out connection caching */
if (1) {
char *s, buf[MaxPathSize];
if ((s=getenv(PKG_FTPIO_CNT)) && atoi(s)>0){
(void) snprintf(buf, sizeof(buf),"%d", atoi(s)-1);
setenv(PKG_FTPIO_CNT, buf, 1);
printf("%s>>> %s -v %s\n", s, argv0, argv[0]);
fexec(argv0, "-v", argv[0], NULL);
}
}
printf("\n\n\n");
argv++;
}
ftp_stop();
return 0;
}
void
cleanup(int i)
{
}
#endif /* STANDALONE */
|