89fc51f330
all the time if we want to use "link" behavior for file URLs (and not have fetch whine at us when they're not).
774 lines
16 KiB
C
774 lines
16 KiB
C
/*-
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* Copyright (c) 1996
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* Jean-Marc Zucconi
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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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* 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 THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, 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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/* $Id: main.c,v 1.18 1996/08/22 23:25:24 jkh Exp $ */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <pwd.h>
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#include <unistd.h>
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#include <sys/types.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 <netdb.h>
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#include <sys/time.h>
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#include <regex.h>
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#include <signal.h>
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#include <sys/stat.h>
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#include <sys/errno.h>
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#include <err.h>
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#include <stdarg.h>
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#include <ftpio.h>
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#define BUFFER_SIZE 1024
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#define HTTP_TIMEOUT 60 /* seconds */
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#define FTP_TIMEOUT 300 /* seconds */
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char buffer[BUFFER_SIZE];
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char *progname;
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int verbose = 1;
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int linkfile = 0;
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char *outputfile = 0;
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char *change_to_dir = 0;
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char *host = 0;
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int passive_mode = 0;
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char *file_to_get = 0;
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int ftp = 0;
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int http_proxy = 0;
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int http = 0;
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int http_port = 80;
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int mirror = 0;
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int newtime = 0;
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int restart = 0;
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time_t modtime;
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FILE *file = 0;
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int timeout_ival = 0;
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void usage(void), die(int), rm(void), timeout(int), ftpget(void),
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httpget(void), fileget(void),
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display(int, int), parse(char *), output_file_name(void),
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f_size(char *, int *, time_t *), ftperr(FILE* ftp, char *, ...),
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filter(unsigned char *, int),
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setup_http_proxy(void);
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int match(char *, char *), http_open(void);
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void
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usage()
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{
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fprintf(stderr, "usage: %s [-DHINPMTVLqlmnpr] [-o outputfile] <-f file -h host [-c dir]| URL>\n", progname);
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exit(1);
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}
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void
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die(int sig)
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{
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int e = errno;
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rm();
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if (!sig)
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fprintf (stderr, "%s: %s\n", progname, sys_errlist[e]);
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else
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fprintf (stderr, "%s: Interrupted by signal %d\n", progname, sig);
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exit(1);
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}
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void
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adjmodtime()
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{
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struct timeval tv[2];
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if (!newtime) {
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tv[0].tv_usec = tv[1].tv_usec = 0;
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tv[0].tv_sec = time(0);
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tv[1].tv_sec = modtime;
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utimes (outputfile, tv);
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}
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}
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void
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rm()
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{
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if (file) {
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fclose(file);
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if (file != stdout) {
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if (!restart && !mirror)
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remove(outputfile);
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adjmodtime();
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}
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}
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}
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int
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main(int argc, char **argv)
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{
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int c;
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char *s = strrchr (argv[0], '/');
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progname = s ? s+1 : argv[0];
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while ((c = getopt (argc, argv, "D:HINPMT:V:Lqc:f:h:o:plmnr")) != EOF) {
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switch (c) {
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case 'D': case 'H': case 'I': case 'N': case 'L': case 'V':
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break; /* ncftp compatibility */
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case 'q':
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verbose = 0;
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case 'c':
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change_to_dir = optarg;
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break;
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case 'f':
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file_to_get = optarg;
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break;
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case 'h':
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host = optarg;
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break;
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case 'l':
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linkfile = 1;
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break;
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case 'o':
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outputfile = optarg;
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break;
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case 'p': case 'P':
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passive_mode = 1;
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break;
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case 'm': case 'M':
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mirror = 1;
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break;
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case 'n':
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newtime = 1;
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break;
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case 'r':
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restart = 1;
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break;
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case 'T':
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timeout_ival = atoi(optarg);
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break;
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default:
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case '?':
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argv[0]) {
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if (host || change_to_dir || file_to_get)
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usage();
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parse(argv[0]);
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} else {
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if (!host || !file_to_get)
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usage();
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}
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if (mirror && restart)
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errx(1, "-m and -r are mutually exclusive.");
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output_file_name();
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signal(SIGHUP, die);
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signal(SIGINT, die);
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signal(SIGQUIT, die);
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signal(SIGTERM, die);
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setup_http_proxy();
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if (http)
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httpget();
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else if (ftp)
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ftpget();
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else
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fileget();
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exit(0);
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}
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void
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timeout(int sig)
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{
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fprintf(stderr, "\n%s: Timeout\n", progname);
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rm();
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exit(1);
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}
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void
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fileget()
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{
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char *basename;
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if (access(file_to_get, R_OK)) {
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fprintf(stderr, "unable to access local file `%s'\n", file_to_get);
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exit(1);
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}
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basename = strrchr(file_to_get, '/');
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if (!basename) {
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fprintf(stderr, "malformed filename `%s' - expected full path.\n",
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file_to_get);
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exit(1);
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}
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++basename; /* move over the / */
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if (!access(basename, F_OK)) {
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fprintf(stderr, "%s: file already exists.\n", basename);
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exit(1);
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}
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if (linkfile) {
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if (symlink(file_to_get, basename) == -1) {
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perror("symlink");
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exit(1);
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}
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}
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else {
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char *buf = alloca(strlen(file_to_get) + strlen(basename) + 15);
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sprintf(buf, "/bin/cp -p %s %s", file_to_get, basename);
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if (system(buf)) {
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fprintf(stderr, "failed to copy %s successfully.", file_to_get);
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exit(1);
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}
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}
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}
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void
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ftpget()
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{
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FILE *ftp, *fp;
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char *cp, *lp;
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int status, n;
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ssize_t size, size0, seekloc;
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char ftp_pw[200];
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time_t t;
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struct itimerval timer;
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if ((cp = getenv("FTP_PASSWORD")) != NULL)
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strcpy(ftp_pw, cp);
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else {
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sprintf (ftp_pw, "%s@", getpwuid (getuid ())->pw_name);
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n = strlen (ftp_pw);
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gethostname (ftp_pw + n, 200 - n);
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}
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if ((lp = getenv("FTP_LOGIN")) == NULL)
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lp = "anonymous";
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ftp = ftpLogin(host, lp, ftp_pw, 0, verbose);
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if (!ftp)
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err(1, "couldn't open FTP connection or login to %s.", host);
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ftpVerbose (ftp, 0);
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/* Time to set our defaults */
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ftpBinary (ftp);
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ftpPassive (ftp, passive_mode);
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if (change_to_dir) {
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status = ftpChdir (ftp, change_to_dir);
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if (status)
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ftperr (ftp, "couldn't cd to %s: ", change_to_dir);
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}
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size = ftpGetSize (ftp, file_to_get);
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modtime = ftpGetModtime (ftp, file_to_get);
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if (modtime < -1) {
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warnx ("Couldn't get file time for %s - using current time", file_to_get);
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modtime = (time_t) -1;
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}
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if (!strcmp (outputfile, "-"))
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restart = 0;
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if (restart || mirror) {
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f_size (outputfile, &size0, &t);
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if (mirror && size0 == size && modtime <= t) {
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fclose(ftp);
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return;
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}
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else if (restart) {
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if (size0 && size0 < size && modtime == t)
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seekloc = size0;
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else
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seekloc = size0 = 0;
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}
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}
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else if (!restart)
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seekloc = size0 = 0;
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fp = ftpGet (ftp, file_to_get, &seekloc);
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if (fp == NULL)
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if (ftpErrno(ftp))
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ftperr (ftp, NULL);
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else
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die(0);
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if (size0 && !seekloc)
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size0 = 0;
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if (strcmp (outputfile, "-")) {
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file = fopen (outputfile, size0 ? "a" : "w");
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if (!file)
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err (1, "could not open output file %s.", outputfile);
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} else
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file = stdout;
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signal (SIGALRM, timeout);
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if (timeout_ival)
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timer.it_interval.tv_sec = timer.it_value.tv_sec = timeout_ival;
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else if ((cp = getenv("FTP_TIMEOUT")) != NULL)
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timer.it_interval.tv_sec = timer.it_value.tv_sec = atoi(cp);
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else
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timer.it_interval.tv_sec = timer.it_value.tv_sec = FTP_TIMEOUT;
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timer.it_interval.tv_usec = timer.it_value.tv_usec = 0;
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setitimer(ITIMER_REAL, &timer, 0);
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display (size, size0);
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while (1) {
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n = status = fread (buffer, 1, BUFFER_SIZE, fp);
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if (status <= 0)
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break;
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display (size, n);
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status = fwrite (buffer, 1, n, file);
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if (status != n)
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break;
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timer.it_interval.tv_sec = timer.it_value.tv_sec = FTP_TIMEOUT;
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timer.it_interval.tv_usec = timer.it_value.tv_usec = 0;
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setitimer(ITIMER_REAL, &timer, 0);
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}
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if (status < 0)
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die(0);
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fclose(fp);
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fclose(file);
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display (size, -1);
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if (file != stdout)
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adjmodtime();
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exit (0);
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}
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void
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display (int size, int n)
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{
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static int bytes, pr, init = 0;
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static struct timeval t0, t_start;
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static char *s;
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struct timezone tz;
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struct timeval t;
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float d;
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if (!verbose)
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return;
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if (init == 0) {
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init = 1;
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gettimeofday(&t0, &tz);
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t_start = t0;
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bytes = pr = 0;
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s = (char *) malloc (strlen(outputfile) + 50);
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if (size > 0)
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sprintf (s, "Receiving %s (%d bytes)%s", outputfile, size,
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size ? "" : " [appending]");
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else
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sprintf (s, "Receiving %s", outputfile);
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printf ("%s", s);
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fflush (stdout);
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bytes = n;
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return;
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}
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gettimeofday(&t, &tz);
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if (n == -1) {
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if (size > 0)
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printf ("\r%s: 100%%", s);
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else
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printf ("\r%s: %d Kbytes", s, bytes/1024);
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d = t.tv_sec + t.tv_usec/1.e6 - t_start.tv_sec - t_start.tv_usec/1.e6;
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printf ("\n%d bytes transfered in %.1f seconds", bytes, d);
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d = bytes/d;
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if (d < 1000)
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printf (" (%d Bytes/s)\n", (int)d);
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else {
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d /=1024;
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printf (" (%.2f K/s)\n", d);
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}
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return;
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}
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bytes += n;
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d = t.tv_sec + t.tv_usec/1.e6 - t0.tv_sec - t0.tv_usec/1.e6;
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if (d < 5) /* display every 5 sec. */
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return;
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t0 = t;
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pr++;
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if (size > 0)
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printf ("\r%s: %2d%%", s, 100*bytes/size);
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else
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printf ("\r%s: %d Kbytes", s, bytes/1024);
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fflush (stdout);
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}
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void
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parse (char *s)
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{
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char *p;
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if (strncasecmp (s, "file:", 5) == 0) {
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/* file:filename */
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s += 4;
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*s++ = '\0';
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host = NULL;
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ftp = http = 0;
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file_to_get = s;
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return;
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}
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else if (strncasecmp (s, "ftp://", 6) == 0) {
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/* ftp://host.name/file/name */
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s += 6;
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p = strchr(s, '/');
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if (!p) {
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fprintf(stderr, "%s: no filename??\n", progname);
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usage();
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}
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ftp = 1;
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}
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else if (strncasecmp (s, "http://", 7) == 0) {
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/* http://host.name/file/name */
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char *q;
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s += 7;
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p = strchr(s, '/');
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if (!p) {
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fprintf (stderr, "%s: no filename??\n", progname);
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usage ();
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}
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*p++ = 0;
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q = strchr (s, ':');
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if (q && q < p) {
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*q++ = 0;
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http_port = atoi (q);
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}
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host = s;
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file_to_get = p;
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http = 1;
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return;
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}
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else {
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/* assume /host.name:/file/name */
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p = strchr (s, ':');
|
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if (!p) {
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fprintf (stderr, "%s: no filename??\n", progname);
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usage ();
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}
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}
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*p++ = 0;
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host = s;
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s = strrchr (p, '/');
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if (s) {
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*s++ = 0;
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change_to_dir = p;
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file_to_get = s;
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} else {
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change_to_dir = 0;
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file_to_get = p;
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}
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}
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|
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void
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output_file_name ()
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{
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char *p;
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|
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if (!outputfile) {
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p = strrchr (file_to_get, '/');
|
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if (!p || (!ftp && !http))
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p = file_to_get;
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else
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p++;
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outputfile = strdup (p);
|
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}
|
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}
|
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|
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void
|
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f_size (char *name, int *size, time_t *time)
|
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{
|
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struct stat s;
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|
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*size = 0;
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|
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if (stat (name, &s))
|
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return;
|
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*size = s.st_size;
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*time = s.st_mtime;
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}
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|
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void
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ftperr (FILE* ftp, char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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|
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if (fmt)
|
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vfprintf(stderr, fmt, ap);
|
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if(ftp) {
|
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const char *str = ftpErrString(ftpErrno(ftp));
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|
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if (str)
|
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fprintf(stderr, "%s\n", str);
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}
|
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rm ();
|
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exit (1);
|
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}
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|
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void
|
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httpget ()
|
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{
|
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char *cp, str[1000];
|
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struct timeval tout;
|
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fd_set fdset;
|
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int i, s;
|
||
|
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restart = 0;
|
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|
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s = http_open ();
|
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sprintf (str, "GET %s%s HTTP/1.0\r\n\r\n",
|
||
http_proxy? "" : "/", file_to_get);
|
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i = strlen (str);
|
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if (i != write (s, str, i))
|
||
err (1, "could not send GET command to HTTP server.");
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|
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FD_ZERO (&fdset);
|
||
FD_SET (s, &fdset);
|
||
if ((cp = getenv("HTTP_TIMEOUT")) != NULL)
|
||
tout.tv_sec = atoi(cp);
|
||
else
|
||
tout.tv_sec = HTTP_TIMEOUT;
|
||
tout.tv_usec = 0;
|
||
|
||
if (strcmp (outputfile, "-")) {
|
||
file = fopen (outputfile, "w");
|
||
if (!file)
|
||
err (1, "could not open output file %s.", outputfile);
|
||
} else {
|
||
file = stdout;
|
||
verbose = 0;
|
||
}
|
||
|
||
while (1) {
|
||
i = select (s+1, &fdset, 0, 0, &tout);
|
||
switch (i) {
|
||
case 0:
|
||
fprintf (stderr, "%s: Timeout\n", progname);
|
||
rm ();
|
||
exit (1);
|
||
case 1:
|
||
i = read (s, buffer, sizeof (buffer));
|
||
filter (buffer, i);
|
||
if (i == 0)
|
||
exit (0);
|
||
break;
|
||
default:
|
||
err (1, "communication error with HTTP server.");
|
||
}
|
||
}
|
||
}
|
||
|
||
int
|
||
match (char *pat, char *s)
|
||
{
|
||
regex_t preg;
|
||
regmatch_t pmatch[2];
|
||
|
||
regcomp (&preg, pat, REG_EXTENDED|REG_ICASE);
|
||
if (regexec(&preg, s, 2, pmatch, 0))
|
||
return 0;
|
||
return pmatch[1].rm_so ? pmatch[1].rm_so : -1;
|
||
}
|
||
|
||
void
|
||
filter (unsigned char *p, int len)
|
||
{
|
||
#define S 512
|
||
static unsigned char s[S+2];
|
||
static int header_len = 0, size = -1, n;
|
||
int i = len;
|
||
unsigned char *q = p;
|
||
|
||
if (header_len < S) {
|
||
while (header_len < S && i--)
|
||
s[header_len++] = *q++;
|
||
s[header_len] = 0;
|
||
if (len && (header_len < S))
|
||
return;
|
||
if (match ("^HTTP/[0-9]+\\.[0-9]+[ \t]+200[^0-9]", s) == 0) {
|
||
/* maybe not found, or document w/o header */
|
||
if (match ("^HTTP/[0-9]+\\.[0-9]+[ \t]+[0-9]+", s)) {
|
||
fprintf (stderr, "%s fetching failed, header so far:\n%s\n", file_to_get, s);
|
||
rm ();
|
||
exit (1);
|
||
}
|
||
/* assume no header */
|
||
/* write s */
|
||
display (size, 0);
|
||
i = fwrite (s, 1, header_len, file);
|
||
if (i != header_len)
|
||
die(0);
|
||
display (size, header_len);
|
||
/* then p */
|
||
if (p+len > q) {
|
||
i = fwrite (q, 1, p+len-q, file);
|
||
if (i != p+len-q)
|
||
die(0);
|
||
display (size, i);
|
||
}
|
||
} else {
|
||
unsigned char *t;
|
||
/* document begins with a success line. try to get size */
|
||
i = match ("content-length:[ \t]*([0-9]+)", s);
|
||
if (i > 0)
|
||
size = atoi (s+i);
|
||
/* assume that the file to get begins after an empty line */
|
||
i = match ("(\n\n|\r\n\r\n)", s);
|
||
if (i > 0) {
|
||
if (s[i] == '\r')
|
||
t = s+i+4;
|
||
else
|
||
t = s+i+2;
|
||
} else {
|
||
fprintf (stderr, "Can't decode the header!\n");
|
||
rm ();
|
||
exit (1);
|
||
}
|
||
display (size, 0);
|
||
n = (s-t)+header_len;
|
||
i = fwrite (t, 1, n, file);
|
||
if (i != n)
|
||
die(0);
|
||
display (size, n);
|
||
if (p+len > q) {
|
||
n = p+len-q;
|
||
i = fwrite (q, 1, n, file);
|
||
if (i != n)
|
||
die(0);
|
||
display (size, n);
|
||
}
|
||
}
|
||
} else {
|
||
i = fwrite (p, 1, len, file);
|
||
if (i != len)
|
||
die(0);
|
||
if (len)
|
||
display (size, i);
|
||
}
|
||
if (len == 0)
|
||
display (size, -1);
|
||
}
|
||
|
||
int
|
||
http_open()
|
||
{
|
||
unsigned long a;
|
||
struct sockaddr_in sin, sin2;
|
||
struct hostent *h;
|
||
int s;
|
||
|
||
a = inet_addr (host);
|
||
if (a != INADDR_NONE) {
|
||
sin.sin_family = AF_INET;
|
||
sin.sin_addr.s_addr = a;
|
||
} else {
|
||
h = gethostbyname (host);
|
||
if (!h)
|
||
err (1, "could not lookup host %s.", host);
|
||
sin.sin_family = h->h_addrtype;
|
||
bcopy(h->h_addr, (char *)&sin.sin_addr, h->h_length);
|
||
}
|
||
sin.sin_port = htons (http_port);
|
||
if ((s = socket (sin.sin_family, SOCK_STREAM, 0)) < 0)
|
||
err (1, 0);
|
||
bzero ((char *)&sin2, sizeof (sin2));
|
||
sin2.sin_family = AF_INET;
|
||
sin2.sin_port = 0;
|
||
sin2.sin_addr.s_addr = htonl (INADDR_ANY);
|
||
if (bind (s, (struct sockaddr *)&sin2, sizeof (sin2)))
|
||
err (1, "could not bind to socket.");
|
||
|
||
if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0)
|
||
err (1, "connection failed.");
|
||
return s;
|
||
}
|
||
|
||
int
|
||
isDebug ()
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
void msgDebug (char *p)
|
||
{
|
||
printf ("%s", p);
|
||
}
|
||
|
||
void
|
||
setup_http_proxy()
|
||
{
|
||
char *e;
|
||
char *p;
|
||
char *url;
|
||
unsigned short port;
|
||
|
||
if (!(e = getenv("HTTP_PROXY"))
|
||
|| !(p = strchr(e, ':'))
|
||
|| (port = atoi(p+1)) == 0)
|
||
return;
|
||
|
||
if (!(url = (char *) malloc (strlen(file_to_get)
|
||
+ strlen(host)
|
||
+ (change_to_dir ? strlen(change_to_dir) : 0)
|
||
+ 50)))
|
||
return;
|
||
|
||
if (http) {
|
||
sprintf(url, "http://%s:%d/%s",
|
||
host, http_port, file_to_get);
|
||
} else {
|
||
if (change_to_dir) {
|
||
sprintf(url, "ftp://%s/%s/%s",
|
||
host, change_to_dir, file_to_get);
|
||
} else {
|
||
sprintf(url, "ftp://%s/%s", host, file_to_get);
|
||
}
|
||
}
|
||
file_to_get = url;
|
||
|
||
*p = 0;
|
||
host = strdup(e);
|
||
http_port = port;
|
||
http = 1;
|
||
http_proxy = 1;
|
||
}
|
||
|