1585 lines
35 KiB
C
1585 lines
35 KiB
C
/* $NetBSD: util.c,v 1.91 2000/01/31 22:01:05 lukem Exp $ */
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/*-
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* Copyright (c) 1997-1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Luke Mewburn.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1985, 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
|
|
* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, 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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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: util.c,v 1.91 2000/01/31 22:01:05 lukem Exp $");
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#endif /* not lint */
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/*
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* FTP User Program -- Misc support routines
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <arpa/ftp.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <glob.h>
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#include <signal.h>
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#include <limits.h>
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#include <pwd.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 <termios.h>
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#include <time.h>
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#include <tzfile.h>
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#include <unistd.h>
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#include "ftp_var.h"
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/*
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* Connect to peer server and
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* auto-login, if possible.
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*/
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void
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setpeer(argc, argv)
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int argc;
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char *argv[];
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{
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char *host;
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char *port;
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if (argc == 0)
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goto usage;
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if (connected) {
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fprintf(ttyout, "Already connected to %s, use close first.\n",
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hostname);
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code = -1;
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return;
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}
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if (argc < 2)
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(void)another(&argc, &argv, "to");
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if (argc < 2 || argc > 3) {
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usage:
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fprintf(ttyout, "usage: %s host-name [port]\n", argv[0]);
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code = -1;
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return;
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}
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if (gatemode)
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port = gateport;
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else
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port = ftpport;
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if (argc > 2)
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port = argv[2];
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if (gatemode) {
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if (gateserver == NULL || *gateserver == '\0')
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errx(1, "gateserver not defined (shouldn't happen)");
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host = hookup(gateserver, port);
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} else
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host = hookup(argv[1], port);
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if (host) {
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int overbose;
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if (gatemode && verbose) {
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fprintf(ttyout,
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"Connecting via pass-through server %s\n",
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gateserver);
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}
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connected = 1;
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/*
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* Set up defaults for FTP.
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*/
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(void)strlcpy(typename, "ascii", sizeof(typename));
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type = TYPE_A;
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curtype = TYPE_A;
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(void)strlcpy(formname, "non-print", sizeof(formname));
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form = FORM_N;
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(void)strlcpy(modename, "stream", sizeof(modename));
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mode = MODE_S;
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(void)strlcpy(structname, "file", sizeof(structname));
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stru = STRU_F;
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(void)strlcpy(bytename, "8", sizeof(bytename));
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bytesize = 8;
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if (autologin)
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(void)ftp_login(argv[1], NULL, NULL);
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overbose = verbose;
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if (debug == 0)
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verbose = -1;
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if (command("SYST") == COMPLETE && overbose) {
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char *cp, c;
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c = 0;
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cp = strchr(reply_string + 4, ' ');
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if (cp == NULL)
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cp = strchr(reply_string + 4, '\r');
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if (cp) {
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if (cp[-1] == '.')
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cp--;
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c = *cp;
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*cp = '\0';
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}
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fprintf(ttyout, "Remote system type is %s.\n",
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reply_string + 4);
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if (cp)
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*cp = c;
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}
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if (!strncmp(reply_string, "215 UNIX Type: L8", 17)) {
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if (proxy)
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unix_proxy = 1;
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else
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unix_server = 1;
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/*
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* Set type to 0 (not specified by user),
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* meaning binary by default, but don't bother
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* telling server. We can use binary
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* for text files unless changed by the user.
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*/
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type = 0;
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(void)strlcpy(typename, "binary", sizeof(typename));
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if (overbose)
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fprintf(ttyout,
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"Using %s mode to transfer files.\n",
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typename);
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} else {
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if (proxy)
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unix_proxy = 0;
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else
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unix_server = 0;
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if (overbose &&
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!strncmp(reply_string, "215 TOPS20", 10))
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fputs(
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"Remember to set tenex mode when transferring binary files from this machine.\n",
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ttyout);
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}
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verbose = overbose;
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}
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}
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/*
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* Reset the various variables that indicate connection state back to
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* disconnected settings.
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* The caller is responsible for issuing any commands to the remote server
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* to perform a clean shutdown before this is invoked.
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*/
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void
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cleanuppeer()
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{
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if (cout)
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(void)fclose(cout);
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cout = NULL;
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connected = 0;
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/*
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* determine if anonftp was specifically set with -a
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* (1), or implicitly set by auto_fetch() (2). in the
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* latter case, disable after the current xfer
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*/
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if (anonftp == 2)
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anonftp = 0;
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data = -1;
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epsv4bad = 0;
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if (username)
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free(username);
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username = NULL;
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if (!proxy)
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macnum = 0;
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}
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/*
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* Top-level signal handler for interrupted commands.
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*/
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void
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intr(dummy)
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int dummy;
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{
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alarmtimer(0);
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if (fromatty)
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write(fileno(ttyout), "\n", 1);
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siglongjmp(toplevel, 1);
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}
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/*
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* Signal handler for lost connections; cleanup various elements of
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* the connection state, and call cleanuppeer() to finish it off.
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*/
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void
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lostpeer(dummy)
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int dummy;
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{
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int oerrno = errno;
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alarmtimer(0);
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if (connected) {
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if (cout != NULL) {
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(void)shutdown(fileno(cout), 1+1);
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(void)fclose(cout);
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cout = NULL;
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}
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if (data >= 0) {
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(void)shutdown(data, 1+1);
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(void)close(data);
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data = -1;
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}
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connected = 0;
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}
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pswitch(1);
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if (connected) {
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if (cout != NULL) {
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(void)shutdown(fileno(cout), 1+1);
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(void)fclose(cout);
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cout = NULL;
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}
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connected = 0;
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}
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proxflag = 0;
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pswitch(0);
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cleanuppeer();
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errno = oerrno;
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}
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/*
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* login to remote host, using given username & password if supplied
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*/
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int
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ftp_login(host, user, pass)
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const char *host;
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const char *user, *pass;
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{
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char tmp[80];
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const char *acct;
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struct passwd *pw;
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int n, aflag, rval, freeuser, freepass, freeacct;
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acct = NULL;
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aflag = rval = freeuser = freepass = freeacct = 0;
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if (debug)
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fprintf(ttyout, "ftp_login: user `%s' pass `%s' host `%s'\n",
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user ? user : "<null>", pass ? pass : "<null>",
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host ? host : "<null>");
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/*
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* Set up arguments for an anonymous FTP session, if necessary.
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*/
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if (anonftp) {
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user = "anonymous"; /* as per RFC 1635 */
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pass = getoptionvalue("anonpass");
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}
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if (user == NULL)
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freeuser = 1;
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if (pass == NULL)
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freepass = 1;
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freeacct = 1;
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if (ruserpass(host, &user, &pass, &acct) < 0) {
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code = -1;
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goto cleanup_ftp_login;
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}
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while (user == NULL) {
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const char *myname = getlogin();
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if (myname == NULL && (pw = getpwuid(getuid())) != NULL)
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myname = pw->pw_name;
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if (myname)
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fprintf(ttyout, "Name (%s:%s): ", host, myname);
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else
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fprintf(ttyout, "Name (%s): ", host);
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*tmp = '\0';
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if (fgets(tmp, sizeof(tmp) - 1, stdin) == NULL) {
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fprintf(ttyout, "\nEOF received; login aborted.\n");
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clearerr(stdin);
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code = -1;
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goto cleanup_ftp_login;
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}
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tmp[strlen(tmp) - 1] = '\0';
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freeuser = 0;
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if (*tmp == '\0')
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user = myname;
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else
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user = tmp;
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}
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if (gatemode) {
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char *nuser;
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int len;
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len = strlen(user) + 1 + strlen(host) + 1;
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nuser = xmalloc(len);
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(void)strlcpy(nuser, user, len);
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(void)strlcat(nuser, "@", len);
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(void)strlcat(nuser, host, len);
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freeuser = 1;
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user = nuser;
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}
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n = command("USER %s", user);
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if (n == CONTINUE) {
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if (pass == NULL) {
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freepass = 0;
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pass = getpass("Password:");
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}
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n = command("PASS %s", pass);
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}
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if (n == CONTINUE) {
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aflag++;
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if (acct == NULL) {
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freeacct = 0;
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acct = getpass("Account:");
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}
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if (acct[0] == '\0') {
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warnx("Login failed.");
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goto cleanup_ftp_login;
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}
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n = command("ACCT %s", acct);
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}
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if ((n != COMPLETE) ||
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(!aflag && acct != NULL && command("ACCT %s", acct) != COMPLETE)) {
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warnx("Login failed.");
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goto cleanup_ftp_login;
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}
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rval = 1;
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username = xstrdup(user);
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if (proxy)
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goto cleanup_ftp_login;
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connected = -1;
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for (n = 0; n < macnum; ++n) {
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if (!strcmp("init", macros[n].mac_name)) {
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(void)strlcpy(line, "$init", sizeof(line));
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makeargv();
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domacro(margc, margv);
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break;
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}
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}
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updateremotepwd();
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|
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cleanup_ftp_login:
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if (user != NULL && freeuser)
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free((char *)user);
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if (pass != NULL && freepass)
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free((char *)pass);
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if (acct != NULL && freeacct)
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free((char *)acct);
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return (rval);
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}
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|
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/*
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* `another' gets another argument, and stores the new argc and argv.
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* It reverts to the top level (via intr()) on EOF/error.
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*
|
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* Returns false if no new arguments have been added.
|
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*/
|
|
int
|
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another(pargc, pargv, prompt)
|
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int *pargc;
|
|
char ***pargv;
|
|
const char *prompt;
|
|
{
|
|
int len = strlen(line), ret;
|
|
|
|
if (len >= sizeof(line) - 3) {
|
|
fputs("sorry, arguments too long.\n", ttyout);
|
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intr(0);
|
|
}
|
|
fprintf(ttyout, "(%s) ", prompt);
|
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line[len++] = ' ';
|
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if (fgets(&line[len], sizeof(line) - len, stdin) == NULL) {
|
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clearerr(stdin);
|
|
intr(0);
|
|
}
|
|
len += strlen(&line[len]);
|
|
if (len > 0 && line[len - 1] == '\n')
|
|
line[len - 1] = '\0';
|
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makeargv();
|
|
ret = margc > *pargc;
|
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*pargc = margc;
|
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*pargv = margv;
|
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return (ret);
|
|
}
|
|
|
|
/*
|
|
* glob files given in argv[] from the remote server.
|
|
* if errbuf isn't NULL, store error messages there instead
|
|
* of writing to the screen.
|
|
*/
|
|
char *
|
|
remglob(argv, doswitch, errbuf)
|
|
char *argv[];
|
|
int doswitch;
|
|
char **errbuf;
|
|
{
|
|
char temp[MAXPATHLEN];
|
|
static char buf[MAXPATHLEN];
|
|
static FILE *ftemp = NULL;
|
|
static char **args;
|
|
int oldverbose, oldhash, fd, len;
|
|
char *cp, *mode;
|
|
|
|
if (!mflag || !connected) {
|
|
if (!doglob)
|
|
args = NULL;
|
|
else {
|
|
if (ftemp) {
|
|
(void)fclose(ftemp);
|
|
ftemp = NULL;
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
if (!doglob) {
|
|
if (args == NULL)
|
|
args = argv;
|
|
if ((cp = *++args) == NULL)
|
|
args = NULL;
|
|
return (cp);
|
|
}
|
|
if (ftemp == NULL) {
|
|
len = strlcpy(temp, tmpdir, sizeof(temp));
|
|
if (temp[len - 1] != '/')
|
|
(void)strlcat(temp, "/", sizeof(temp));
|
|
(void)strlcat(temp, TMPFILE, sizeof(temp));
|
|
if ((fd = mkstemp(temp)) < 0) {
|
|
warn("unable to create temporary file %s", temp);
|
|
return (NULL);
|
|
}
|
|
close(fd);
|
|
oldverbose = verbose;
|
|
verbose = (errbuf != NULL) ? -1 : 0;
|
|
oldhash = hash;
|
|
hash = 0;
|
|
if (doswitch)
|
|
pswitch(!proxy);
|
|
for (mode = "w"; *++argv != NULL; mode = "a")
|
|
recvrequest("NLST", temp, *argv, mode, 0, 0);
|
|
if ((code / 100) != COMPLETE) {
|
|
if (errbuf != NULL)
|
|
*errbuf = reply_string;
|
|
}
|
|
if (doswitch)
|
|
pswitch(!proxy);
|
|
verbose = oldverbose;
|
|
hash = oldhash;
|
|
ftemp = fopen(temp, "r");
|
|
(void)unlink(temp);
|
|
if (ftemp == NULL) {
|
|
if (errbuf == NULL)
|
|
fputs(
|
|
"can't find list of remote files, oops.\n",
|
|
ttyout);
|
|
else
|
|
*errbuf =
|
|
"can't find list of remote files, oops.";
|
|
return (NULL);
|
|
}
|
|
}
|
|
if (fgets(buf, sizeof(buf), ftemp) == NULL) {
|
|
(void)fclose(ftemp);
|
|
ftemp = NULL;
|
|
return (NULL);
|
|
}
|
|
if ((cp = strchr(buf, '\n')) != NULL)
|
|
*cp = '\0';
|
|
return (buf);
|
|
}
|
|
|
|
/*
|
|
* Glob a local file name specification with the expectation of a single
|
|
* return value. Can't control multiple values being expanded from the
|
|
* expression, we return only the first.
|
|
* Returns NULL on error, or a pointer to a buffer containing the filename
|
|
* that's the caller's responsiblity to free(3) when finished with.
|
|
*/
|
|
char *
|
|
globulize(pattern)
|
|
const char *pattern;
|
|
{
|
|
glob_t gl;
|
|
int flags;
|
|
char *p;
|
|
|
|
if (!doglob)
|
|
return (xstrdup(pattern));
|
|
|
|
flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
|
|
memset(&gl, 0, sizeof(gl));
|
|
if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) {
|
|
warnx("%s: not found", pattern);
|
|
globfree(&gl);
|
|
return (NULL);
|
|
}
|
|
p = xstrdup(gl.gl_pathv[0]);
|
|
globfree(&gl);
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* determine size of remote file
|
|
*/
|
|
off_t
|
|
remotesize(file, noisy)
|
|
const char *file;
|
|
int noisy;
|
|
{
|
|
int overbose;
|
|
off_t size;
|
|
|
|
overbose = verbose;
|
|
size = -1;
|
|
if (debug == 0)
|
|
verbose = -1;
|
|
if (command("SIZE %s", file) == COMPLETE) {
|
|
char *cp, *ep;
|
|
|
|
cp = strchr(reply_string, ' ');
|
|
if (cp != NULL) {
|
|
cp++;
|
|
#ifndef NO_QUAD
|
|
size = strtoq(cp, &ep, 10);
|
|
#else
|
|
size = strtol(cp, &ep, 10);
|
|
#endif
|
|
if (*ep != '\0' && !isspace((unsigned char)*ep))
|
|
size = -1;
|
|
}
|
|
} else if (noisy && debug == 0) {
|
|
fputs(reply_string, ttyout);
|
|
putc('\n', ttyout);
|
|
}
|
|
verbose = overbose;
|
|
return (size);
|
|
}
|
|
|
|
/*
|
|
* determine last modification time (in GMT) of remote file
|
|
*/
|
|
time_t
|
|
remotemodtime(file, noisy)
|
|
const char *file;
|
|
int noisy;
|
|
{
|
|
int overbose;
|
|
time_t rtime;
|
|
int ocode;
|
|
|
|
overbose = verbose;
|
|
ocode = code;
|
|
rtime = -1;
|
|
if (debug == 0)
|
|
verbose = -1;
|
|
if (command("MDTM %s", file) == COMPLETE) {
|
|
struct tm timebuf;
|
|
char *timestr, *frac;
|
|
int yy, mo, day, hour, min, sec;
|
|
|
|
/*
|
|
* time-val = 14DIGIT [ "." 1*DIGIT ]
|
|
* YYYYMMDDHHMMSS[.sss]
|
|
* mdtm-response = "213" SP time-val CRLF / error-response
|
|
*/
|
|
timestr = reply_string + 4;
|
|
|
|
/*
|
|
* parse fraction.
|
|
* XXX: ignored for now
|
|
*/
|
|
frac = strchr(timestr, '\r');
|
|
if (frac != NULL)
|
|
*frac = '\0';
|
|
frac = strchr(timestr, '.');
|
|
if (frac != NULL)
|
|
*frac++ = '\0';
|
|
if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) {
|
|
/*
|
|
* XXX: Workaround for lame ftpd's that return
|
|
* `19100' instead of `2000'
|
|
*/
|
|
fprintf(ttyout,
|
|
"Y2K warning! Incorrect time-val `%s' received from server.\n",
|
|
timestr);
|
|
timestr++;
|
|
timestr[0] = '2';
|
|
timestr[1] = '0';
|
|
fprintf(ttyout, "Converted to `%s'\n", timestr);
|
|
}
|
|
if (strlen(timestr) != 14 ||
|
|
sscanf(timestr, "%04d%02d%02d%02d%02d%02d",
|
|
&yy, &mo, &day, &hour, &min, &sec) != 6) {
|
|
bad_parse_time:
|
|
fprintf(ttyout, "Can't parse time `%s'.\n", timestr);
|
|
goto cleanup_parse_time;
|
|
}
|
|
memset(&timebuf, 0, sizeof(timebuf));
|
|
timebuf.tm_sec = sec;
|
|
timebuf.tm_min = min;
|
|
timebuf.tm_hour = hour;
|
|
timebuf.tm_mday = day;
|
|
timebuf.tm_mon = mo - 1;
|
|
timebuf.tm_year = yy - TM_YEAR_BASE;
|
|
timebuf.tm_isdst = -1;
|
|
rtime = timegm(&timebuf);
|
|
if (rtime == -1) {
|
|
if (noisy || debug != 0)
|
|
goto bad_parse_time;
|
|
else
|
|
goto cleanup_parse_time;
|
|
} else if (debug)
|
|
fprintf(ttyout, "parsed date as: %s", ctime(&rtime));
|
|
} else if (noisy && debug == 0) {
|
|
fputs(reply_string, ttyout);
|
|
putc('\n', ttyout);
|
|
}
|
|
cleanup_parse_time:
|
|
verbose = overbose;
|
|
if (rtime == -1)
|
|
code = ocode;
|
|
return (rtime);
|
|
}
|
|
|
|
/*
|
|
* update global `remotepwd', which contains the state of the remote cwd
|
|
*/
|
|
void
|
|
updateremotepwd()
|
|
{
|
|
int overbose, ocode, i;
|
|
char *cp;
|
|
|
|
overbose = verbose;
|
|
ocode = code;
|
|
if (debug == 0)
|
|
verbose = -1;
|
|
if (command("PWD") != COMPLETE)
|
|
goto badremotepwd;
|
|
cp = strchr(reply_string, ' ');
|
|
if (cp == NULL || cp[0] == '\0' || cp[1] != '"')
|
|
goto badremotepwd;
|
|
cp += 2;
|
|
for (i = 0; *cp && i < sizeof(remotepwd) - 1; i++, cp++) {
|
|
if (cp[0] == '"') {
|
|
if (cp[1] == '"')
|
|
cp++;
|
|
else
|
|
break;
|
|
}
|
|
remotepwd[i] = *cp;
|
|
}
|
|
remotepwd[i] = '\0';
|
|
if (debug)
|
|
fprintf(ttyout, "got remotepwd as `%s'\n", remotepwd);
|
|
goto cleanupremotepwd;
|
|
badremotepwd:
|
|
remotepwd[0]='\0';
|
|
cleanupremotepwd:
|
|
verbose = overbose;
|
|
code = ocode;
|
|
}
|
|
|
|
#ifndef NO_PROGRESS
|
|
|
|
/*
|
|
* return non-zero if we're the current foreground process
|
|
*/
|
|
int
|
|
foregroundproc()
|
|
{
|
|
static pid_t pgrp = -1;
|
|
|
|
if (pgrp == -1)
|
|
pgrp = getpgrp();
|
|
|
|
return (tcgetpgrp(fileno(ttyout)) == pgrp);
|
|
}
|
|
|
|
|
|
static void updateprogressmeter __P((int));
|
|
|
|
/*
|
|
* SIGALRM handler to update the progress meter
|
|
*/
|
|
static void
|
|
updateprogressmeter(dummy)
|
|
int dummy;
|
|
{
|
|
int oerrno = errno;
|
|
|
|
progressmeter(0);
|
|
errno = oerrno;
|
|
}
|
|
#endif /* NO_PROGRESS */
|
|
|
|
|
|
/*
|
|
* List of order of magnitude prefixes.
|
|
* The last is `P', as 2^64 = 16384 Petabytes
|
|
*/
|
|
static const char prefixes[] = " KMGTP";
|
|
|
|
/*
|
|
* Display a transfer progress bar if progress is non-zero.
|
|
* SIGALRM is hijacked for use by this function.
|
|
* - Before the transfer, set filesize to size of file (or -1 if unknown),
|
|
* and call with flag = -1. This starts the once per second timer,
|
|
* and a call to updateprogressmeter() upon SIGALRM.
|
|
* - During the transfer, updateprogressmeter will call progressmeter
|
|
* with flag = 0
|
|
* - After the transfer, call with flag = 1
|
|
*/
|
|
static struct timeval start;
|
|
static struct timeval lastupdate;
|
|
|
|
#define BUFLEFT (sizeof(buf) - len)
|
|
|
|
void
|
|
progressmeter(flag)
|
|
int flag;
|
|
{
|
|
static off_t lastsize;
|
|
#ifndef NO_PROGRESS
|
|
struct timeval now, td, wait;
|
|
off_t cursize, abbrevsize, bytespersec;
|
|
double elapsed;
|
|
int ratio, barlength, i, len, remaining;
|
|
|
|
/*
|
|
* Work variables for progress bar.
|
|
*
|
|
* XXX: if the format of the progress bar changes
|
|
* (especially the number of characters in the
|
|
* `static' portion of it), be sure to update
|
|
* these appropriately.
|
|
*/
|
|
char buf[256]; /* workspace for progress bar */
|
|
#define BAROVERHEAD 43 /* non `*' portion of progress bar */
|
|
/*
|
|
* stars should contain at least
|
|
* sizeof(buf) - BAROVERHEAD entries
|
|
*/
|
|
const char stars[] =
|
|
"*****************************************************************************"
|
|
"*****************************************************************************"
|
|
"*****************************************************************************";
|
|
|
|
#endif
|
|
|
|
if (flag == -1) {
|
|
(void)gettimeofday(&start, NULL);
|
|
lastupdate = start;
|
|
lastsize = restart_point;
|
|
}
|
|
#ifndef NO_PROGRESS
|
|
len = 0;
|
|
if (!progress || filesize <= 0)
|
|
return;
|
|
|
|
(void)gettimeofday(&now, NULL);
|
|
cursize = bytes + restart_point;
|
|
timersub(&now, &lastupdate, &wait);
|
|
if (cursize > lastsize) {
|
|
lastupdate = now;
|
|
lastsize = cursize;
|
|
wait.tv_sec = 0;
|
|
}
|
|
|
|
/*
|
|
* print progress bar only if we are foreground process.
|
|
*/
|
|
if (! foregroundproc())
|
|
return;
|
|
|
|
ratio = (int)((double)cursize * 100.0 / (double)filesize);
|
|
ratio = MAX(ratio, 0);
|
|
ratio = MIN(ratio, 100);
|
|
len += snprintf(buf + len, BUFLEFT, "\r%3d%% ", ratio);
|
|
|
|
/*
|
|
* calculate the length of the `*' bar, ensuring that
|
|
* the number of stars won't exceed the buffer size
|
|
*/
|
|
barlength = MIN(sizeof(buf) - 1, ttywidth) - BAROVERHEAD;
|
|
if (barlength > 0) {
|
|
i = barlength * ratio / 100;
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
"|%.*s%*s|", i, stars, barlength - i, "");
|
|
}
|
|
|
|
abbrevsize = cursize;
|
|
for (i = 0; abbrevsize >= 100000 && i < sizeof(prefixes); i++)
|
|
abbrevsize >>= 10;
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
#ifndef NO_QUAD
|
|
" %5lld %c%c ", (long long)abbrevsize,
|
|
#else
|
|
" %5ld %c%c ", (long)abbrevsize,
|
|
#endif
|
|
prefixes[i],
|
|
i == 0 ? ' ' : 'B');
|
|
|
|
timersub(&now, &start, &td);
|
|
elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
|
|
|
|
bytespersec = 0;
|
|
if (bytes > 0) {
|
|
bytespersec = bytes;
|
|
if (elapsed > 0.0)
|
|
bytespersec /= elapsed;
|
|
}
|
|
for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++)
|
|
bytespersec >>= 10;
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
#ifndef NO_QUAD
|
|
" %3lld.%02d %cB/s ", (long long)bytespersec / 1024,
|
|
#else
|
|
" %3ld.%02d %cB/s ", (long)bytespersec / 1024,
|
|
#endif
|
|
(int)((bytespersec % 1024) * 100 / 1024),
|
|
prefixes[i]);
|
|
|
|
if (bytes <= 0 || elapsed <= 0.0 || cursize > filesize) {
|
|
len += snprintf(buf + len, BUFLEFT, " --:-- ETA");
|
|
} else if (wait.tv_sec >= STALLTIME) {
|
|
len += snprintf(buf + len, BUFLEFT, " - stalled -");
|
|
} else {
|
|
remaining = (int)
|
|
((filesize - restart_point) / (bytes / elapsed) - elapsed);
|
|
if (remaining >= 100 * SECSPERHOUR)
|
|
len += snprintf(buf + len, BUFLEFT, " --:-- ETA");
|
|
else {
|
|
i = remaining / SECSPERHOUR;
|
|
if (i)
|
|
len += snprintf(buf + len, BUFLEFT, "%2d:", i);
|
|
else
|
|
len += snprintf(buf + len, BUFLEFT, " ");
|
|
i = remaining % SECSPERHOUR;
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
"%02d:%02d ETA", i / 60, i % 60);
|
|
}
|
|
}
|
|
if (flag == 1)
|
|
len += snprintf(buf + len, BUFLEFT, "\n");
|
|
(void)write(fileno(ttyout), buf, len);
|
|
|
|
if (flag == -1) {
|
|
(void)xsignal_restart(SIGALRM, updateprogressmeter, 1);
|
|
alarmtimer(1); /* set alarm timer for 1 Hz */
|
|
} else if (flag == 1) {
|
|
(void)xsignal(SIGALRM, SIG_DFL);
|
|
alarmtimer(0);
|
|
}
|
|
#endif /* !NO_PROGRESS */
|
|
}
|
|
|
|
/*
|
|
* Display transfer statistics.
|
|
* Requires start to be initialised by progressmeter(-1),
|
|
* direction to be defined by xfer routines, and filesize and bytes
|
|
* to be updated by xfer routines
|
|
* If siginfo is nonzero, an ETA is displayed, and the output goes to stderr
|
|
* instead of ttyout.
|
|
*/
|
|
void
|
|
ptransfer(siginfo)
|
|
int siginfo;
|
|
{
|
|
struct timeval now, td, wait;
|
|
double elapsed;
|
|
off_t bytespersec;
|
|
int remaining, hh, i, len;
|
|
|
|
char buf[256]; /* Work variable for transfer status. */
|
|
|
|
if (!verbose && !progress && !siginfo)
|
|
return;
|
|
|
|
(void)gettimeofday(&now, NULL);
|
|
timersub(&now, &start, &td);
|
|
elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
|
|
bytespersec = 0;
|
|
if (bytes > 0) {
|
|
bytespersec = bytes;
|
|
if (elapsed > 0.0)
|
|
bytespersec /= elapsed;
|
|
}
|
|
len = 0;
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
#ifndef NO_QUAD
|
|
"%lld byte%s %s in ", (long long)bytes,
|
|
#else
|
|
"%ld byte%s %s in ", (long)bytes,
|
|
#endif
|
|
bytes == 1 ? "" : "s", direction);
|
|
remaining = (int)elapsed;
|
|
if (remaining > SECSPERDAY) {
|
|
int days;
|
|
|
|
days = remaining / SECSPERDAY;
|
|
remaining %= SECSPERDAY;
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
"%d day%s ", days, days == 1 ? "" : "s");
|
|
}
|
|
hh = remaining / SECSPERHOUR;
|
|
remaining %= SECSPERHOUR;
|
|
if (hh)
|
|
len += snprintf(buf + len, BUFLEFT, "%2d:", hh);
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
"%02d:%02d ", remaining / 60, remaining % 60);
|
|
|
|
for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++)
|
|
bytespersec >>= 10;
|
|
len += snprintf(buf + len, BUFLEFT,
|
|
#ifndef NO_QUAD
|
|
"(%lld.%02d %cB/s)", (long long)bytespersec / 1024,
|
|
#else
|
|
"(%ld.%02d %cB/s)", (long)bytespersec / 1024,
|
|
#endif
|
|
(int)((bytespersec % 1024) * 100 / 1024),
|
|
prefixes[i]);
|
|
|
|
if (siginfo && bytes > 0 && elapsed > 0.0 && filesize >= 0
|
|
&& bytes + restart_point <= filesize) {
|
|
remaining = (int)((filesize - restart_point) /
|
|
(bytes / elapsed) - elapsed);
|
|
hh = remaining / SECSPERHOUR;
|
|
remaining %= SECSPERHOUR;
|
|
len += snprintf(buf + len, BUFLEFT, " ETA: ");
|
|
if (hh)
|
|
len += snprintf(buf + len, BUFLEFT, "%2d:", hh);
|
|
len += snprintf(buf + len, BUFLEFT, "%02d:%02d",
|
|
remaining / 60, remaining % 60);
|
|
timersub(&now, &lastupdate, &wait);
|
|
if (wait.tv_sec >= STALLTIME)
|
|
len += snprintf(buf + len, BUFLEFT, " (stalled)");
|
|
}
|
|
len += snprintf(buf + len, BUFLEFT, "\n");
|
|
(void)write(siginfo ? STDERR_FILENO : fileno(ttyout), buf, len);
|
|
}
|
|
|
|
/*
|
|
* SIG{INFO,QUIT} handler to print transfer stats if a transfer is in progress
|
|
*/
|
|
void
|
|
psummary(notused)
|
|
int notused;
|
|
{
|
|
int oerrno = errno;
|
|
|
|
if (bytes > 0) {
|
|
if (fromatty)
|
|
write(fileno(ttyout), "\n", 1);
|
|
ptransfer(1);
|
|
}
|
|
errno = oerrno;
|
|
}
|
|
|
|
/*
|
|
* List words in stringlist, vertically arranged
|
|
*/
|
|
void
|
|
list_vertical(sl)
|
|
StringList *sl;
|
|
{
|
|
int i, j, w;
|
|
int columns, width, lines, items;
|
|
char *p;
|
|
|
|
width = items = 0;
|
|
|
|
for (i = 0 ; i < sl->sl_cur ; i++) {
|
|
w = strlen(sl->sl_str[i]);
|
|
if (w > width)
|
|
width = w;
|
|
}
|
|
width = (width + 8) &~ 7;
|
|
|
|
columns = ttywidth / width;
|
|
if (columns == 0)
|
|
columns = 1;
|
|
lines = (sl->sl_cur + columns - 1) / columns;
|
|
for (i = 0; i < lines; i++) {
|
|
for (j = 0; j < columns; j++) {
|
|
p = sl->sl_str[j * lines + i];
|
|
if (p)
|
|
fputs(p, ttyout);
|
|
if (j * lines + i + lines >= sl->sl_cur) {
|
|
putc('\n', ttyout);
|
|
break;
|
|
}
|
|
w = strlen(p);
|
|
while (w < width) {
|
|
w = (w + 8) &~ 7;
|
|
(void)putc('\t', ttyout);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Update the global ttywidth value, using TIOCGWINSZ.
|
|
*/
|
|
void
|
|
setttywidth(a)
|
|
int a;
|
|
{
|
|
struct winsize winsize;
|
|
int oerrno = errno;
|
|
|
|
if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 &&
|
|
winsize.ws_col != 0)
|
|
ttywidth = winsize.ws_col;
|
|
else
|
|
ttywidth = 80;
|
|
errno = oerrno;
|
|
}
|
|
|
|
/*
|
|
* Change the rate limit up (SIGUSR1) or down (SIGUSR2)
|
|
*/
|
|
void
|
|
crankrate(sig)
|
|
int sig;
|
|
{
|
|
|
|
switch (sig) {
|
|
case SIGUSR1:
|
|
if (rate_get)
|
|
rate_get += rate_get_incr;
|
|
if (rate_put)
|
|
rate_put += rate_put_incr;
|
|
break;
|
|
case SIGUSR2:
|
|
if (rate_get && rate_get > rate_get_incr)
|
|
rate_get -= rate_get_incr;
|
|
if (rate_put && rate_put > rate_put_incr)
|
|
rate_put -= rate_put_incr;
|
|
break;
|
|
default:
|
|
err(1, "crankrate invoked with unknown signal: %d", sig);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Set the SIGALRM interval timer for wait seconds, 0 to disable.
|
|
*/
|
|
void
|
|
alarmtimer(wait)
|
|
int wait;
|
|
{
|
|
struct itimerval itv;
|
|
|
|
itv.it_value.tv_sec = wait;
|
|
itv.it_value.tv_usec = 0;
|
|
itv.it_interval = itv.it_value;
|
|
setitimer(ITIMER_REAL, &itv, NULL);
|
|
}
|
|
|
|
/*
|
|
* Setup or cleanup EditLine structures
|
|
*/
|
|
#ifndef NO_EDITCOMPLETE
|
|
void
|
|
controlediting()
|
|
{
|
|
if (editing && el == NULL && hist == NULL) {
|
|
HistEvent ev;
|
|
int editmode;
|
|
|
|
el = el_init(__progname, stdin, ttyout, stderr);
|
|
/* init editline */
|
|
hist = history_init(); /* init the builtin history */
|
|
history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */
|
|
el_set(el, EL_HIST, history, hist); /* use history */
|
|
|
|
el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */
|
|
el_set(el, EL_PROMPT, prompt); /* set the prompt functions */
|
|
el_set(el, EL_RPROMPT, rprompt);
|
|
|
|
/* add local file completion, bind to TAB */
|
|
el_set(el, EL_ADDFN, "ftp-complete",
|
|
"Context sensitive argument completion",
|
|
complete);
|
|
el_set(el, EL_BIND, "^I", "ftp-complete", NULL);
|
|
el_source(el, NULL); /* read ~/.editrc */
|
|
if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0)
|
|
editing = 0; /* the user doesn't want editing,
|
|
* so disable, and let statement
|
|
* below cleanup */
|
|
else
|
|
el_set(el, EL_SIGNAL, 1);
|
|
}
|
|
if (!editing) {
|
|
if (hist) {
|
|
history_end(hist);
|
|
hist = NULL;
|
|
}
|
|
if (el) {
|
|
el_end(el);
|
|
el = NULL;
|
|
}
|
|
}
|
|
}
|
|
#endif /* !NO_EDITCOMPLETE */
|
|
|
|
/*
|
|
* Convert the string `arg' to an int, which may have an optional SI suffix
|
|
* (`b', `k', `m', `g'). Returns the number for success, -1 otherwise.
|
|
*/
|
|
int
|
|
strsuftoi(arg)
|
|
const char *arg;
|
|
{
|
|
char *cp;
|
|
long val;
|
|
|
|
if (!isdigit((unsigned char)arg[0]))
|
|
return (-1);
|
|
|
|
val = strtol(arg, &cp, 10);
|
|
if (cp != NULL) {
|
|
if (cp[0] != '\0' && cp[1] != '\0')
|
|
return (-1);
|
|
switch (tolower((unsigned char)cp[0])) {
|
|
case '\0':
|
|
case 'b':
|
|
break;
|
|
case 'k':
|
|
val <<= 10;
|
|
break;
|
|
case 'm':
|
|
val <<= 20;
|
|
break;
|
|
case 'g':
|
|
val <<= 30;
|
|
break;
|
|
default:
|
|
return (-1);
|
|
}
|
|
}
|
|
if (val < 0 || val > INT_MAX)
|
|
return (-1);
|
|
|
|
return (val);
|
|
}
|
|
|
|
/*
|
|
* Set up socket buffer sizes before a connection is made.
|
|
*/
|
|
void
|
|
setupsockbufsize(sock)
|
|
int sock;
|
|
{
|
|
|
|
if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void *) &sndbuf_size,
|
|
sizeof(rcvbuf_size)) < 0)
|
|
warn("unable to set sndbuf size %d", sndbuf_size);
|
|
|
|
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *) &rcvbuf_size,
|
|
sizeof(rcvbuf_size)) < 0)
|
|
warn("unable to set rcvbuf size %d", rcvbuf_size);
|
|
}
|
|
|
|
/*
|
|
* Copy characters from src into dst, \ quoting characters that require it
|
|
*/
|
|
void
|
|
ftpvis(dst, dstlen, src, srclen)
|
|
char *dst;
|
|
size_t dstlen;
|
|
const char *src;
|
|
size_t srclen;
|
|
{
|
|
int di, si;
|
|
|
|
for (di = si = 0;
|
|
src[si] != '\0' && di < dstlen && si < srclen;
|
|
di++, si++) {
|
|
switch (src[si]) {
|
|
case '\\':
|
|
case ' ':
|
|
case '\t':
|
|
case '\r':
|
|
case '\n':
|
|
case '"':
|
|
dst[di++] = '\\';
|
|
if (di >= dstlen)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
dst[di] = src[si];
|
|
}
|
|
}
|
|
dst[di] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Copy src into buf (which is len bytes long), expanding % sequences.
|
|
*/
|
|
void
|
|
formatbuf(buf, len, src)
|
|
char *buf;
|
|
size_t len;
|
|
const char *src;
|
|
{
|
|
const char *p;
|
|
char *p2, *q;
|
|
int i, op, updirs, pdirs;
|
|
|
|
#define ADDBUF(x) do { \
|
|
if (i >= len - 1) \
|
|
goto endbuf; \
|
|
buf[i++] = (x); \
|
|
} while (0)
|
|
|
|
p = src;
|
|
for (i = 0; *p; p++) {
|
|
if (*p != '%') {
|
|
ADDBUF(*p);
|
|
continue;
|
|
}
|
|
p++;
|
|
|
|
switch (op = *p) {
|
|
|
|
case '/':
|
|
case '.':
|
|
case 'c':
|
|
p2 = connected ? remotepwd : "";
|
|
updirs = pdirs = 0;
|
|
|
|
/* option to determine fixed # of dirs from path */
|
|
if (op == '.' || op == 'c') {
|
|
int skip;
|
|
|
|
q = p2;
|
|
while (*p2) /* calc # of /'s */
|
|
if (*p2++ == '/')
|
|
updirs++;
|
|
if (p[1] == '0') { /* print <x> or ... */
|
|
pdirs = 1;
|
|
p++;
|
|
}
|
|
if (p[1] >= '1' && p[1] <= '9') {
|
|
/* calc # to skip */
|
|
skip = p[1] - '0';
|
|
p++;
|
|
} else
|
|
skip = 1;
|
|
|
|
updirs -= skip;
|
|
while (skip-- > 0) {
|
|
while ((p2 > q) && (*p2 != '/'))
|
|
p2--; /* back up */
|
|
if (skip && p2 > q)
|
|
p2--;
|
|
}
|
|
if (*p2 == '/' && p2 != q)
|
|
p2++;
|
|
}
|
|
|
|
if (updirs > 0 && pdirs) {
|
|
if (i >= len - 5)
|
|
break;
|
|
if (op == '.') {
|
|
ADDBUF('.');
|
|
ADDBUF('.');
|
|
ADDBUF('.');
|
|
} else {
|
|
ADDBUF('/');
|
|
ADDBUF('<');
|
|
if (updirs > 9) {
|
|
ADDBUF('9');
|
|
ADDBUF('+');
|
|
} else
|
|
ADDBUF('0' + updirs);
|
|
ADDBUF('>');
|
|
}
|
|
}
|
|
for (; *p2; p2++)
|
|
ADDBUF(*p2);
|
|
break;
|
|
|
|
case 'M':
|
|
case 'm':
|
|
for (p2 = connected ? hostname : "-"; *p2; p2++) {
|
|
if (op == 'm' && *p2 == '.')
|
|
break;
|
|
ADDBUF(*p2);
|
|
}
|
|
break;
|
|
|
|
case 'n':
|
|
for (p2 = connected ? username : "-"; *p2 ; p2++)
|
|
ADDBUF(*p2);
|
|
break;
|
|
|
|
case '%':
|
|
ADDBUF('%');
|
|
break;
|
|
|
|
default: /* display unknown codes literally */
|
|
ADDBUF('%');
|
|
ADDBUF(op);
|
|
break;
|
|
|
|
}
|
|
}
|
|
endbuf:
|
|
buf[i] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Determine if given string is an IPv6 address or not.
|
|
* Return 1 for yes, 0 for no
|
|
*/
|
|
int
|
|
isipv6addr(addr)
|
|
const char *addr;
|
|
{
|
|
int rv = 0;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 su_sin6;
|
|
|
|
rv = inet_pton(AF_INET6, addr, &su_sin6.sin6_addr);
|
|
if (debug)
|
|
fprintf(ttyout, "isipv6addr: got %d for %s\n", rv, addr);
|
|
#endif
|
|
return (rv == 1) ? 1 : 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Internal version of connect(2); sets socket buffer sizes first.
|
|
*/
|
|
int
|
|
xconnect(sock, name, namelen)
|
|
int sock;
|
|
const struct sockaddr *name;
|
|
int namelen;
|
|
{
|
|
|
|
setupsockbufsize(sock);
|
|
return (connect(sock, name, namelen));
|
|
}
|
|
|
|
/*
|
|
* Internal version of listen(2); sets socket buffer sizes first.
|
|
*/
|
|
int
|
|
xlisten(sock, backlog)
|
|
int sock, backlog;
|
|
{
|
|
|
|
setupsockbufsize(sock);
|
|
return (listen(sock, backlog));
|
|
}
|
|
|
|
/*
|
|
* malloc() with inbuilt error checking
|
|
*/
|
|
void *
|
|
xmalloc(size)
|
|
size_t size;
|
|
{
|
|
void *p;
|
|
|
|
p = malloc(size);
|
|
if (p == NULL)
|
|
err(1, "Unable to allocate %ld bytes of memory", (long)size);
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* sl_init() with inbuilt error checking
|
|
*/
|
|
StringList *
|
|
xsl_init()
|
|
{
|
|
StringList *p;
|
|
|
|
p = sl_init();
|
|
if (p == NULL)
|
|
err(1, "Unable to allocate memory for stringlist");
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* sl_add() with inbuilt error checking
|
|
*/
|
|
void
|
|
xsl_add(sl, i)
|
|
StringList *sl;
|
|
char *i;
|
|
{
|
|
|
|
if (sl_add(sl, i) == -1)
|
|
err(1, "Unable to add `%s' to stringlist", i);
|
|
}
|
|
|
|
/*
|
|
* strdup() with inbuilt error checking
|
|
*/
|
|
char *
|
|
xstrdup(str)
|
|
const char *str;
|
|
{
|
|
char *s;
|
|
|
|
if (str == NULL)
|
|
errx(1, "xstrdup() called with NULL argument");
|
|
s = strdup(str);
|
|
if (s == NULL)
|
|
err(1, "Unable to allocate memory for string copy");
|
|
return (s);
|
|
}
|
|
|
|
/*
|
|
* Install a POSIX signal handler, allowing the invoker to set whether
|
|
* the signal should be restartable or not
|
|
*/
|
|
sigfunc
|
|
xsignal_restart(sig, func, restartable)
|
|
int sig;
|
|
sigfunc func;
|
|
int restartable;
|
|
{
|
|
struct sigaction act, oact;
|
|
act.sa_handler = func;
|
|
|
|
sigemptyset(&act.sa_mask);
|
|
#if defined(SA_RESTART) /* 4.4BSD, Posix(?), SVR4 */
|
|
act.sa_flags = restartable ? SA_RESTART : 0;
|
|
#elif defined(SA_INTERRUPT) /* SunOS 4.x */
|
|
act.sa_flags = restartable ? 0 : SA_INTERRUPT;
|
|
#else
|
|
#error "system must have SA_RESTART or SA_INTERRUPT"
|
|
#endif
|
|
if (sigaction(sig, &act, &oact) < 0)
|
|
return (SIG_ERR);
|
|
return (oact.sa_handler);
|
|
}
|
|
|
|
/*
|
|
* Install a signal handler with the `restartable' flag set dependent upon
|
|
* which signal is being set. (This is a wrapper to xsignal_restart())
|
|
*/
|
|
sigfunc
|
|
xsignal(sig, func)
|
|
int sig;
|
|
sigfunc func;
|
|
{
|
|
int restartable;
|
|
|
|
/*
|
|
* Some signals print output or change the state of the process.
|
|
* There should be restartable, so that reads and writes are
|
|
* not affected. Some signals should cause program flow to change;
|
|
* these signals should not be restartable, so that the system call
|
|
* will return with EINTR, and the program will go do something
|
|
* different. If the signal handler calls longjmp() or siglongjmp(),
|
|
* it doesn't matter if it's restartable.
|
|
*/
|
|
|
|
switch(sig) {
|
|
#ifdef SIGINFO
|
|
case SIGINFO:
|
|
#endif
|
|
case SIGQUIT:
|
|
case SIGUSR1:
|
|
case SIGUSR2:
|
|
case SIGWINCH:
|
|
restartable = 1;
|
|
break;
|
|
|
|
case SIGALRM:
|
|
case SIGINT:
|
|
case SIGPIPE:
|
|
restartable = 0;
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* This is unpleasant, but I don't know what would be better.
|
|
* Right now, this "can't happen"
|
|
*/
|
|
errx(1, "xsignal_restart called with signal %d", sig);
|
|
}
|
|
|
|
return(xsignal_restart(sig, func, restartable));
|
|
}
|