403 lines
9.8 KiB
C
403 lines
9.8 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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/* $FreeBSD$ */
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.h> /* needed for INT_MAX */
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include <sys/param.h> /* for MAXHOSTNAMELEN */
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#include <sys/time.h> /* for struct timeval, gettimeofday */
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#include "fetch.h"
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static struct fetch_state clean_fetch_state;
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static sigjmp_buf sigbuf;
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static int get(struct fetch_state *volatile fs);
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: fetch [-ADHILMNPRTVablFmnpqrstv] [-o outputfile] "
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"[-S bytes]\n"
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" [-f file -h host [-c dir] | URL]\n");
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exit(EX_USAGE);
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}
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int
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main(int argc, char *const *argv)
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{
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int c;
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char *ep;
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struct fetch_state fs;
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const char *change_to_dir, *file_to_get, *hostname;
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int error, rv;
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unsigned long l;
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init_schemes();
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fs = clean_fetch_state;
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fs.fs_verbose = 1;
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fs.fs_reportsize = 0;
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fs.fs_expectedsize = -1;
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change_to_dir = file_to_get = hostname = 0;
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#define OPT_STRING "Aabc:D:Ff:h:HIlLmMnNo:pPqRrS:stT:vV:"
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while ((c = getopt(argc, argv, OPT_STRING)) != -1) {
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switch (c) {
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case 'A':
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fs.fs_auto_retry = -1;
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break;
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case 'D': case 'H': case 'I': case 'L': case 'N': case 'V':
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break; /* ncftp compatibility */
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case 'F':
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fs.fs_forcerestart = 1;
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break;
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case 'a':
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fs.fs_auto_retry = 1;
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break;
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case 'b':
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fs.fs_linux_bug = 1;
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break;
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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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hostname = optarg;
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break;
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case 'l':
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fs.fs_linkfile = 1;
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break;
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case 'm': case 'M':
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fs.fs_mirror = 1;
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break;
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case 'n':
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fs.fs_newtime = 1;
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break;
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case 'o':
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fs.fs_outputfile = optarg;
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break;
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case 'p': case 'P':
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fs.fs_passive_mode = 1;
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break;
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case 'q':
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fs.fs_verbose = 0;
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break;
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case 'r':
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fs.fs_restart = 1;
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break;
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case 'R':
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fs.fs_precious = 1;
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break;
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case 't':
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fs.fs_use_connect = 1;
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break;
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case 's':
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fs.fs_reportsize = 1;
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break;
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case 'S':
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/* strtol sets errno to ERANGE in the case of overflow */
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errno = 0;
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l = strtoul(optarg, &ep, 0);
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if (!optarg[0] || *ep || errno != 0 || l > INT_MAX)
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errx(EX_USAGE, "invalid size value: `%s'",
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optarg);
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fs.fs_expectedsize = l;
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break;
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case 'T':
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/* strtol sets errno to ERANGE in the case of overflow */
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errno = 0;
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l = strtoul(optarg, &ep, 0);
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if (!optarg[0] || *ep || errno != 0 || l > INT_MAX)
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errx(EX_USAGE, "invalid timeout value: `%s'",
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optarg);
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fs.fs_timeout = l;
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break;
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case 'v':
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if (fs.fs_verbose < 2)
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fs.fs_verbose = 2;
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else
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fs.fs_verbose++;
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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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clean_fetch_state = fs; /* preserve option settings */
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if (argv[optind] && (hostname || change_to_dir || file_to_get)) {
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warnx("cannot use -h, -c, or -f with a URI argument");
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usage();
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}
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if (fs.fs_mirror && fs.fs_restart)
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errx(EX_USAGE, "-m and -r are mutually exclusive.");
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if (argv[optind] == 0) {
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char *uri;
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if (hostname == 0) hostname = "localhost";
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if (change_to_dir == 0) change_to_dir = "";
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if (file_to_get == 0) {
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usage();
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}
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uri = alloca(sizeof("ftp://") + strlen(hostname) +
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strlen(change_to_dir) + 5 + strlen(file_to_get));
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strcpy(uri, "ftp://");
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strcat(uri, hostname);
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strcat(uri, "/");
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if (change_to_dir[0] == '/') {
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strcat(uri, "%2f");
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strcat(uri, change_to_dir+1);
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}
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else strcat(uri, change_to_dir);
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if (file_to_get[0] != '/' && uri[strlen(uri) - 1] != '/')
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strcat(uri, "/");
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strcat(uri, file_to_get);
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error = parse_uri(&fs, uri);
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if (error)
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return error;
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return get(&fs);
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}
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for (rv = 0; argv[optind] != 0; optind++) {
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error = parse_uri(&fs, argv[optind]);
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if (error) {
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rv = error;
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continue;
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}
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error = get(&fs);
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if (error) {
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rv = error;
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}
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fs = clean_fetch_state;
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}
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return rv;
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}
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/*
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* The signal handling is probably more complex than it needs to be,
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* but it doesn't cost a lot, so we'll be extra-careful. Using
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* siglongjmp() to get out of the signal handler allows us to
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* call rm() without having to store the state variable in some global
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* spot where the signal handler can get at it. We also obviate the need
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* for a separate timeout signal handler.
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*/
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static int
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get(struct fetch_state *volatile fs)
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{
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volatile int error;
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struct sigaction oldhup, oldint, oldquit, oldterm;
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struct sigaction catch;
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volatile sigset_t omask;
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sigemptyset(&catch.sa_mask);
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sigaddset(&catch.sa_mask, SIGHUP);
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sigaddset(&catch.sa_mask, SIGINT);
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sigaddset(&catch.sa_mask, SIGQUIT);
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sigaddset(&catch.sa_mask, SIGTERM);
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sigaddset(&catch.sa_mask, SIGALRM);
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catch.sa_handler = catchsig;
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catch.sa_flags = 0;
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sigprocmask(SIG_BLOCK, &catch.sa_mask, (sigset_t *)&omask);
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sigaction(SIGHUP, &catch, &oldhup);
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sigaction(SIGINT, &catch, &oldint);
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sigaction(SIGQUIT, &catch, &oldquit);
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sigaction(SIGTERM, &catch, &oldterm);
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error = sigsetjmp(sigbuf, 0);
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if (error == SIGALRM) {
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rm(fs);
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unsetup_sigalrm();
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fprintf(stderr, "\n"); /* just in case */
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warnx("%s: %s: timed out", fs->fs_outputfile, fs->fs_status);
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goto close;
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} else if (error) {
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rm(fs);
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fprintf(stderr, "\n"); /* just in case */
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warnx("%s: interrupted by signal: %s", fs->fs_status,
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sys_signame[error]);
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sigdelset(&omask, error);
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signal(error, SIG_DFL);
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sigprocmask(SIG_SETMASK, (sigset_t *)&omask, 0);
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raise(error); /* so that it gets reported as such */
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}
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sigprocmask(SIG_SETMASK, (sigset_t *)&omask, 0);
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error = fs->fs_retrieve(fs);
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close:
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sigaction(SIGHUP, &oldhup, 0);
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sigaction(SIGINT, &oldint, 0);
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sigaction(SIGQUIT, &oldquit, 0);
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sigaction(SIGTERM, &oldterm, 0);
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fs->fs_close(fs);
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return error;
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}
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/*
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* Utility functions
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*/
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/*
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* Handle all signals by jumping back into get().
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*/
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void
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catchsig(int sig)
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{
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siglongjmp(sigbuf, sig);
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}
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/*
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* Used to generate the progress display when not in quiet mode.
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* Return != 0 when the file appears to be truncated.
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*/
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int
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display(struct fetch_state *fs, off_t size, ssize_t n)
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{
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static off_t bytes;
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static off_t bytestart;
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static int pr, stdoutatty, 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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int truncated;
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if (size != -1 && n == -1 && bytes != size) {
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truncated = 1;
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} else
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truncated = 0;
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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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stdoutatty = isatty(STDOUT_FILENO);
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if (size > 0)
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asprintf (&s, "Receiving %s (%qd bytes)%s", fs->fs_outputfile,
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(quad_t)size,
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size ? "" : " [appending]");
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else
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asprintf (&s, "Receiving %s", fs->fs_outputfile);
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if (fs->fs_verbose)
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fprintf (stderr, "%s", s);
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bytestart = bytes = n;
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goto out;
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}
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gettimeofday(&t, &tz);
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if (n == -1) {
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if(stdoutatty && fs->fs_verbose) {
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if (size > 0)
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fprintf (stderr, "\r%s: 100%%", s);
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else
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fprintf (stderr, "\r%s: %qd Kbytes", s, (long long)bytes/1024);
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}
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bytes -= bytestart;
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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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if (fs->fs_verbose)
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fprintf (stderr, "\n%qd bytes transferred in %.1f seconds",
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(long long)bytes, d);
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d = bytes/d;
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if (fs->fs_verbose) {
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if (d < 1000)
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fprintf (stderr, " (%.0f bytes/s)\n", d);
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else {
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d /=1024;
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fprintf (stderr, " (%.2f Kbytes/s)\n", d);
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}
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}
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free(s);
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init = 0;
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goto out;
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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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goto out;
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t0 = t;
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pr++;
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if(stdoutatty && fs->fs_verbose) {
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if (size > 1000000)
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fprintf (stderr, "\r%s: %2qd%%", s, (long long)(bytes/(size/100)));
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else if (size > 0)
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fprintf (stderr, "\r%s: %2qd%%", s, (long long)(100*bytes/size));
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else
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fprintf (stderr, "\r%s: %qd Kbytes", s, (long long)(bytes/1024));
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}
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out:
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if (truncated != 0)
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fprintf(stderr, "WARNING: File %s appears to be truncated: "
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"%qd/%qd bytes\n",
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fs->fs_outputfile,
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(quad_t)bytes, (quad_t)size);
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return truncated;
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}
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