/* $NetBSD: util.c,v 1.168 2024/09/25 16:53:58 christos Exp $ */
/*-
* Copyright (c) 1997-2023 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1985, 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: util.c,v 1.168 2024/09/25 16:53:58 christos Exp $");
#endif /* not lint */
/*
* FTP User Program -- Misc support routines
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/ftp.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <glob.h>
#include <signal.h>
#include <libgen.h>
#include <limits.h>
#include <locale.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <tzfile.h>
#include <unistd.h>
#include "ftp_var.h"
/*
* Connect to peer server and auto-login, if possible.
*/
void
setpeer(int argc, char *argv[])
{
char *host;
const char *port;
if (argc == 0)
goto usage;
if (connected) {
fprintf(ttyout, "Already connected to %s, use close first.\n",
hostname);
code = -1;
return;
}
if (argc < 2)
(void)another(&argc, &argv, "to");
if (argc < 2 || argc > 3) {
usage:
UPRINTF("usage: %s host-name [port]\n", argv[0]);
code = -1;
return;
}
if (gatemode)
port = gateport;
else
port = ftpport;
if (argc > 2)
port = argv[2];
if (gatemode) {
if (gateserver == NULL || *gateserver == '\0')
errx(1, "main: gateserver not defined");
host = hookup(gateserver, port);
} else
host = hookup(argv[1], port);
if (host) {
if (gatemode && verbose) {
fprintf(ttyout,
"Connecting via pass-through server %s\n",
gateserver);
}
connected = 1;
/*
* Set up defaults for FTP.
*/
(void)strlcpy(typename, "ascii", sizeof(typename));
type = TYPE_A;
curtype = TYPE_A;
(void)strlcpy(formname, "non-print", sizeof(formname));
form = FORM_N;
(void)strlcpy(modename, "stream", sizeof(modename));
mode = MODE_S;
(void)strlcpy(structname, "file", sizeof(structname));
stru = STRU_F;
(void)strlcpy(bytename, "8", sizeof(bytename));
bytesize = 8;
if (autologin)
(void)ftp_login(argv[1], NULL, NULL);
}
}
static void
parse_feat(const char *fline)
{
/*
* work-around broken ProFTPd servers that can't
* even obey RFC 2389.
*/
while (*fline && isspace((unsigned char)*fline))
fline++;
if (strcasecmp(fline, "MDTM") == 0)
features[FEAT_MDTM] = 1;
else if (strncasecmp(fline, "MLST", sizeof("MLST") - 1) == 0) {
features[FEAT_MLST] = 1;
} else if (strcasecmp(fline, "REST STREAM") == 0)
features[FEAT_REST_STREAM] = 1;
else if (strcasecmp(fline, "SIZE") == 0)
features[FEAT_SIZE] = 1;
else if (strcasecmp(fline, "TVFS") == 0)
features[FEAT_TVFS] = 1;
}
/*
* Determine the remote system type (SYST) and features (FEAT).
* Call after a successful login (i.e, connected = -1)
*/
void
getremoteinfo(void)
{
int overbose, i;
overbose = verbose;
if (ftp_debug == 0)
verbose = -1;
/* determine remote system type */
if (command("SYST") == COMPLETE) {
if (overbose) {
off_t os_len = strcspn(reply_string + 4, " \r\n\t");
if (os_len > 1 && reply_string[4 + os_len - 1] == '.')
os_len--;
fprintf(ttyout, "Remote system type is %.*s.\n",
(int)os_len, reply_string + 4);
}
/*
* Decide whether we should default to binary.
* Traditionally checked for "215 UNIX Type: L8", but
* some printers report "Linux" ! so be more forgiving.
* In reality we probably almost never want text any more.
*/
if (!strncasecmp(reply_string + 4, "unix", 4) ||
!strncasecmp(reply_string + 4, "linux", 5)) {
if (proxy)
unix_proxy = 1;
else
unix_server = 1;
/*
* Set type to 0 (not specified by user),
* meaning binary by default, but don't bother
* telling server. We can use binary
* for text files unless changed by the user.
*/
type = 0;
(void)strlcpy(typename, "binary", sizeof(typename));
if (overbose)
fprintf(ttyout,
"Using %s mode to transfer files.\n",
typename);
} else {
if (proxy)
unix_proxy = 0;
else
unix_server = 0;
if (overbose &&
!strncmp(reply_string, "215 TOPS20", 10))
fputs(
"Remember to set tenex mode when transferring binary files from this machine.\n",
ttyout);
}
}
/* determine features (if any) */
for (i = 0; i < FEAT_max; i++)
features[i] = -1;
reply_callback = parse_feat;
if (command("FEAT") == COMPLETE) {
for (i = 0; i < FEAT_max; i++) {
if (features[i] == -1)
features[i] = 0;
}
features[FEAT_FEAT] = 1;
} else
features[FEAT_FEAT] = 0;
#ifndef NO_DEBUG
if (ftp_debug) {
#define DEBUG_FEAT(x) fprintf(ttyout, "features[" #x "] = %d\n", features[(x)])
DEBUG_FEAT(FEAT_FEAT);
DEBUG_FEAT(FEAT_MDTM);
DEBUG_FEAT(FEAT_MLST);
DEBUG_FEAT(FEAT_REST_STREAM);
DEBUG_FEAT(FEAT_SIZE);
DEBUG_FEAT(FEAT_TVFS);
#undef DEBUG_FEAT
}
#endif
reply_callback = NULL;
verbose = overbose;
}
/*
* Reset the various variables that indicate connection state back to
* disconnected settings.
* The caller is responsible for issuing any commands to the remote server
* to perform a clean shutdown before this is invoked.
*/
void
cleanuppeer(void)
{
if (cout)
(void)fclose(cout);
cout = NULL;
connected = 0;
unix_server = 0;
unix_proxy = 0;
/*
* determine if anonftp was specifically set with -a
* (1), or implicitly set by auto_fetch() (2). in the
* latter case, disable after the current xfer
*/
if (anonftp == 2)
anonftp = 0;
data = -1;
epsv4bad = 0;
epsv6bad = 0;
if (username)
free(username);
username = NULL;
if (!proxy)
macnum = 0;
}
/*
* Top-level signal handler for interrupted commands.
*/
void
intr(int signo __unused)
{
sigint_raised = 1;
alarmtimer(0);
if (fromatty)
write(fileno(ttyout), "\n", 1);
siglongjmp(toplevel, 1);
}
/*
* Signal handler for lost connections; cleanup various elements of
* the connection state, and call cleanuppeer() to finish it off.
* This function is not signal safe, so exit if called by a signal.
*/
void
lostpeer(int signo)
{
int oerrno = errno;
alarmtimer(0);
if (connected) {
if (cout != NULL) {
(void)shutdown(fileno(cout), 1+1);
(void)fclose(cout);
cout = NULL;
}
if (data >= 0) {
(void)shutdown(data, 1+1);
(void)close(data);
data = -1;
}
connected = 0;
}
pswitch(1);
if (connected) {
if (cout != NULL) {
(void)shutdown(fileno(cout), 1+1);
(void)fclose(cout);
cout = NULL;
}
connected = 0;
}
proxflag = 0;
pswitch(0);
cleanuppeer();
if (signo) {
errx(1, "lostpeer due to signal %d", signo);
}
errno = oerrno;
}
/*
* Login to remote host, using given username & password if supplied.
* Return non-zero if successful.
*/
int
ftp_login(const char *host, const char *luser, const char *lpass)
{
char tmp[80];
char *fuser, *pass, *facct, *p;
char emptypass[] = "";
const char *errormsg;
int n, aflag, rval, nlen;
aflag = rval = 0;
fuser = pass = facct = NULL;
if (luser)
fuser = ftp_strdup(luser);
if (lpass)
pass = ftp_strdup(lpass);
DPRINTF("ftp_login: user `%s' pass `%s' host `%s'\n",
STRorNULL(fuser), STRorNULL(pass), STRorNULL(host));
/*
* Set up arguments for an anonymous FTP session, if necessary.
*/
if (anonftp) {
FREEPTR(fuser);
fuser = ftp_strdup("anonymous"); /* as per RFC 1635 */
FREEPTR(pass);
pass = ftp_strdup(getoptionvalue("anonpass"));
}
if (ruserpass(host, &fuser, &pass, &facct) < 0) {
code = -1;
goto cleanup_ftp_login;
}
while (fuser == NULL) {
if (localname)
fprintf(ttyout, "Name (%s:%s): ", host, localname);
else
fprintf(ttyout, "Name (%s): ", host);
errormsg = NULL;
nlen = get_line(stdin, tmp, sizeof(tmp), &errormsg);
if (nlen < 0) {
fprintf(ttyout, "%s; %s aborted.\n", errormsg, "login");
code = -1;
goto cleanup_ftp_login;
} else if (nlen == 0) {
fuser = ftp_strdup(localname);
} else {
fuser = ftp_strdup(tmp);
}
}
if (gatemode) {
char *nuser;
size_t len;
len = strlen(fuser) + 1 + strlen(host) + 1;
nuser = ftp_malloc(len);
(void)strlcpy(nuser, fuser, len);
(void)strlcat(nuser, "@", len);
(void)strlcat(nuser, host, len);
FREEPTR(fuser);
fuser = nuser;
}
n = command("USER %s", fuser);
if (n == CONTINUE) {
if (pass == NULL) {
p = getpass("Password: ");
if (p == NULL)
p = emptypass;
pass = ftp_strdup(p);
memset(p, 0, strlen(p));
}
n = command("PASS %s", pass);
memset(pass, 0, strlen(pass));
}
if (n == CONTINUE) {
aflag++;
if (facct == NULL) {
p = getpass("Account: ");
if (p == NULL)
p = emptypass;
facct = ftp_strdup(p);
memset(p, 0, strlen(p));
}
if (facct[0] == '\0') {
warnx("Login failed");
goto cleanup_ftp_login;
}
n = command("ACCT %s", facct);
memset(facct, 0, strlen(facct));
}
if ((n != COMPLETE) ||
(!aflag && facct != NULL && command("ACCT %s", facct) != COMPLETE)) {
warnx("Login failed");
goto cleanup_ftp_login;
}
rval = 1;
username = ftp_strdup(fuser);
if (proxy)
goto cleanup_ftp_login;
connected = -1;
getremoteinfo();
for (n = 0; n < macnum; ++n) {
if (!strcmp("init", macros[n].mac_name)) {
(void)strlcpy(line, "$init", sizeof(line));
makeargv();
domacro(margc, margv);
break;
}
}
updatelocalcwd();
remotecwd[0] = '\0';
remcwdvalid = 0;
cleanup_ftp_login:
FREEPTR(fuser);
if (pass != NULL)
memset(pass, 0, strlen(pass));
FREEPTR(pass);
if (facct != NULL)
memset(facct, 0, strlen(facct));
FREEPTR(facct);
return (rval);
}
/*
* `another' gets another argument, and stores the new argc and argv.
* It reverts to the top level (via intr()) on EOF/error.
*
* Returns false if no new arguments have been added.
*/
int
another(int *pargc, char ***pargv, const char *aprompt)
{
const char *errormsg;
int ret, nlen;
size_t len;
len = strlen(line);
if (len >= sizeof(line) - 3) {
fputs("Sorry, arguments too long.\n", ttyout);
intr(0);
}
fprintf(ttyout, "(%s) ", aprompt);
line[len++] = ' ';
errormsg = NULL;
nlen = get_line(stdin, line + len, sizeof(line)-len, &errormsg);
if (nlen < 0) {
fprintf(ttyout, "%s; %s aborted.\n", errormsg, "operation");
intr(0);
}
len += nlen;
makeargv();
ret = margc > *pargc;
*pargc = margc;
*pargv = margv;
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(char *argv[], int doswitch, const char **errbuf)
{
static char buf[MAXPATHLEN];
static FILE *ftemp = NULL;
static char **args;
char temp[MAXPATHLEN];
int oldverbose, oldhash, oldprogress, fd;
char *cp;
const char *rmode;
size_t len;
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;
oldprogress = progress;
hash = 0;
progress = 0;
if (doswitch)
pswitch(!proxy);
for (rmode = "w"; *++argv != NULL; rmode = "a")
recvrequest("NLST", temp, *argv, rmode, 0, 0);
if ((code / 100) != COMPLETE) {
if (errbuf != NULL)
*errbuf = reply_string;
}
if (doswitch)
pswitch(!proxy);
verbose = oldverbose;
hash = oldhash;
progress = oldprogress;
ftemp = fopen(temp, "r");
(void)unlink(temp);
if (ftemp == NULL) {
if (errbuf == NULL)
warnx("Can't find list of remote files");
else
*errbuf =
"Can't find list of remote files";
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 responsibility to free(3) when finished with.
*/
char *
globulize(const char *pattern)
{
glob_t gl;
int flags;
char *p;
if (!doglob)
return (ftp_strdup(pattern));
flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
memset(&gl, 0, sizeof(gl));
if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) {
warnx("Glob pattern `%s' not found", pattern);
globfree(&gl);
return (NULL);
}
p = ftp_strdup(gl.gl_pathv[0]);
globfree(&gl);
return (p);
}
/*
* determine size of remote file
*/
off_t
remotesize(const char *file, int noisy)
{
int overbose, r;
off_t size;
overbose = verbose;
size = -1;
if (ftp_debug == 0)
verbose = -1;
if (! features[FEAT_SIZE]) {
if (noisy)
fprintf(ttyout,
"SIZE is not supported by remote server.\n");
goto cleanup_remotesize;
}
r = command("SIZE %s", file);
if (r == COMPLETE) {
char *cp, *ep;
cp = strchr(reply_string, ' ');
if (cp != NULL) {
cp++;
size = STRTOLL(cp, &ep, 10);
if (*ep != '\0' && !isspace((unsigned char)*ep))
size = -1;
}
} else {
if (r == ERROR && code == 500 && features[FEAT_SIZE] == -1)
features[FEAT_SIZE] = 0;
if (noisy && ftp_debug == 0) {
fputs(reply_string, ttyout);
putc('\n', ttyout);
}
}
cleanup_remotesize:
verbose = overbose;
return (size);
}
/*
* determine last modification time (in GMT) of remote file
*/
time_t
remotemodtime(const char *file, int noisy)
{
int overbose, ocode, r;
time_t rtime;
overbose = verbose;
ocode = code;
rtime = -1;
if (ftp_debug == 0)
verbose = -1;
if (! features[FEAT_MDTM]) {
if (noisy)
fprintf(ttyout,
"MDTM is not supported by remote server.\n");
goto cleanup_parse_time;
}
r = command("MDTM %s", file);
if (r == COMPLETE) {
struct tm timebuf;
char *timestr, *frac;
/*
* 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 buggy ftp servers 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);
}
memset(&timebuf, 0, sizeof(timebuf));
if (strlen(timestr) != 14 ||
(strptime(timestr, "%Y%m%d%H%M%S", &timebuf) == NULL)) {
bad_parse_time:
fprintf(ttyout, "Can't parse time `%s'.\n", timestr);
goto cleanup_parse_time;
}
timebuf.tm_isdst = -1;
rtime = timegm(&timebuf);
if (rtime == -1) {
if (noisy || ftp_debug != 0)
goto bad_parse_time;
else
goto cleanup_parse_time;
} else {
DPRINTF("remotemodtime: parsed time `%s' as " LLF
", %s",
timestr, (LLT)rtime,
rfc2822time(localtime(&rtime)));
}
} else {
if (r == ERROR && code == 500 && features[FEAT_MDTM] == -1)
features[FEAT_MDTM] = 0;
if (noisy && ftp_debug == 0) {
fputs(reply_string, ttyout);
putc('\n', ttyout);
}
}
cleanup_parse_time:
verbose = overbose;
if (rtime == -1)
code = ocode;
return (rtime);
}
/*
* Format tm in an RFC 2822 compatible manner, with a trailing \n.
* Returns a pointer to a static string containing the result.
*/
const char *
rfc2822time(const struct tm *tm)
{
static char result[50];
if (strftime(result, sizeof(result),
"%a, %d %b %Y %H:%M:%S %z\n", tm) == 0)
errx(1, "Can't convert RFC 2822 time: buffer too small");
return result;
}
/*
* Parse HTTP-date as per RFC 2616.
* Return a pointer to the next character of the consumed date string,
* or NULL if failed.
*/
const char *
parse_rfc2616time(struct tm *parsed, const char *httpdate)
{
const char *t;
const char *curlocale;
/* The representation of %a depends on the current locale. */
curlocale = setlocale(LC_TIME, NULL);
(void)setlocale(LC_TIME, "C");
/* RFC 1123 */
if ((t = strptime(httpdate, "%a, %d %b %Y %H:%M:%S GMT", parsed)) ||
/* RFC 850 */
(t = strptime(httpdate, "%a, %d-%b-%y %H:%M:%S GMT", parsed)) ||
/* asctime */
(t = strptime(httpdate, "%a, %b %d %H:%M:%S %Y", parsed))) {
; /* do nothing */
}
(void)setlocale(LC_TIME, curlocale);
return t;
}
/*
* Update global `localcwd', which contains the state of the local cwd
*/
void
updatelocalcwd(void)
{
if (getcwd(localcwd, sizeof(localcwd)) == NULL)
localcwd[0] = '\0';
DPRINTF("updatelocalcwd: got `%s'\n", localcwd);
}
/*
* Update global `remotecwd', which contains the state of the remote cwd
*/
void
updateremotecwd(void)
{
int overbose, ocode;
size_t i;
char *cp;
remcwdvalid = 1; /* whether it works or not, we are done */
overbose = verbose;
ocode = code;
if (ftp_debug == 0)
verbose = -1;
if (command("PWD") != COMPLETE)
goto badremotecwd;
cp = strchr(reply_string, ' ');
if (cp == NULL || cp[0] == '\0' || cp[1] != '"')
goto badremotecwd;
cp += 2;
for (i = 0; *cp && i < sizeof(remotecwd) - 1; i++, cp++) {
if (cp[0] == '"') {
if (cp[1] == '"')
cp++;
else
break;
}
remotecwd[i] = *cp;
}
remotecwd[i] = '\0';
DPRINTF("updateremotecwd: got `%s'\n", remotecwd);
goto cleanupremotecwd;
badremotecwd:
remotecwd[0]='\0';
cleanupremotecwd:
verbose = overbose;
code = ocode;
}
/*
* Ensure file is in or under dir.
* Returns 1 if so, 0 if not (or an error occurred).
*/
int
fileindir(const char *file, const char *dir)
{
char parentdirbuf[PATH_MAX+1], *parentdir;
char realdir[PATH_MAX+1];
size_t dirlen;
/* determine parent directory of file */
(void)strlcpy(parentdirbuf, file, sizeof(parentdirbuf));
parentdir = dirname(parentdirbuf);
if (strcmp(parentdir, ".") == 0)
return 1; /* current directory is ok */
/* find the directory */
if (realpath(parentdir, realdir) == NULL) {
warn("Unable to determine real path of `%s'", parentdir);
return 0;
}
if (realdir[0] != '/') /* relative result is ok */
return 1;
dirlen = strlen(dir);
if (strncmp(realdir, dir, dirlen) == 0 &&
(realdir[dirlen] == '/' || realdir[dirlen] == '\0'))
return 1;
return 0;
}
/*
* List words in stringlist, vertically arranged
*/
void
list_vertical(StringList *sl)
{
size_t i, j;
size_t columns, lines;
char *p;
size_t w, width;
width = 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;
}
if (p) {
w = strlen(p);
while (w < width) {
w = (w + 8) &~ 7;
(void)putc('\t', ttyout);
}
}
}
}
}
/*
* Update the global ttywidth value, using TIOCGWINSZ.
*/
void
setttywidth(int a __unused)
{
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(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);
}
}
/*
* Setup or cleanup EditLine structures
*/
#ifndef NO_EDITCOMPLETE
void
controlediting(void)
{
if (editing && el == NULL && hist == NULL) {
HistEvent ev;
int editmode;
el = el_init(getprogname(), 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(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 (int)(val);
}
/*
* Set up socket buffer sizes before a connection is made.
*/
void
setupsockbufsize(int sock)
{
socklen_t slen;
if (0 == rcvbuf_size) {
slen = sizeof(rcvbuf_size);
if (getsockopt(sock, SOL_SOCKET, SO_RCVBUF,
(void *)&rcvbuf_size, &slen) == -1)
err(1, "Unable to determine rcvbuf size");
if (rcvbuf_size <= 0)
rcvbuf_size = 8 * 1024;
if (rcvbuf_size > 8 * 1024 * 1024)
rcvbuf_size = 8 * 1024 * 1024;
DPRINTF("setupsockbufsize: rcvbuf_size determined as %d\n",
rcvbuf_size);
}
if (0 == sndbuf_size) {
slen = sizeof(sndbuf_size);
if (getsockopt(sock, SOL_SOCKET, SO_SNDBUF,
(void *)&sndbuf_size, &slen) == -1)
err(1, "Unable to determine sndbuf size");
if (sndbuf_size <= 0)
sndbuf_size = 8 * 1024;
if (sndbuf_size > 8 * 1024 * 1024)
sndbuf_size = 8 * 1024 * 1024;
DPRINTF("setupsockbufsize: sndbuf_size determined as %d\n",
sndbuf_size);
}
if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
(void *)&sndbuf_size, sizeof(sndbuf_size)) == -1)
warn("Unable to set sndbuf size %d", sndbuf_size);
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
(void *)&rcvbuf_size, sizeof(rcvbuf_size)) == -1)
warn("Unable to set rcvbuf size %d", rcvbuf_size);
}
/*
* Copy characters from src into dst, \ quoting characters that require it
*/
void
ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen)
{
size_t di, si;
di = si = 0;
while (src[si] != '\0' && di < dstlen && si < srclen) {
switch (src[si]) {
case '\\':
case ' ':
case '\t':
case '\r':
case '\n':
case '"':
/*
* Need room for two characters and NUL, avoiding
* incomplete escape sequences at end of dst.
*/
if (di >= dstlen - 3)
break;
dst[di++] = '\\';
/* FALLTHROUGH */
default:
dst[di] = src[si++];
if (di < dstlen)
di++;
}
}
dst[di] = '\0';
}
/*
* Copy src into buf (which is len bytes long), expanding % sequences.
*/
void
formatbuf(char *buf, size_t len, const char *src)
{
const char *p, *p2, *q;
size_t i;
int 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':
if (connected && !remcwdvalid)
updateremotecwd();
p2 = connected ? remotecwd : "";
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 ? 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(const char *addr)
{
int rv = 0;
#ifdef INET6
struct addrinfo hints, *res;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
hints.ai_flags = AI_NUMERICHOST;
if (getaddrinfo(addr, "0", &hints, &res) != 0)
rv = 0;
else {
rv = 1;
freeaddrinfo(res);
}
DPRINTF("isipv6addr: got %d for %s\n", rv, addr);
#endif
return (rv == 1) ? 1 : 0;
}
/*
* Read a line from the FILE stream into buf/buflen using fgets(), so up
* to buflen-1 chars will be read and the result will be NUL terminated.
* If the line has a trailing newline it will be removed.
* If the line is too long, excess characters will be read until
* newline/EOF/error.
* If EOF/error occurs or a too-long line is encountered and errormsg
* isn't NULL, it will be changed to a description of the problem.
* (The EOF message has a leading \n for cosmetic purposes).
* Returns:
* >=0 length of line (excluding trailing newline) if all ok
* -1 error occurred
* -2 EOF encountered
* -3 line was too long
*/
int
get_line(FILE *stream, char *buf, size_t buflen, const char **errormsg)
{
int rv, ch;
size_t len;
if (fgets(buf, (int)buflen, stream) == NULL) {
if (feof(stream)) { /* EOF */
rv = -2;
if (errormsg)
*errormsg = "\nEOF received";
} else { /* error */
rv = -1;
if (errormsg)
*errormsg = "Error encountered";
}
clearerr(stream);
return rv;
}
len = strlen(buf);
if (buf[len-1] == '\n') { /* clear any trailing newline */
buf[--len] = '\0';
} else if (len == buflen-1) { /* line too long */
while ((ch = getchar()) != '\n' && ch != EOF)
continue;
if (errormsg)
*errormsg = "Input line is too long";
clearerr(stream);
return -3;
}
if (errormsg)
*errormsg = NULL;
return (int)len;
}
/*
* Internal version of connect(2); sets socket buffer sizes,
* binds to a specific local address (if set), and
* supports a connection timeout using a non-blocking connect(2) with
* a poll(2).
* Socket fcntl flags are temporarily updated to include O_NONBLOCK;
* these will not be reverted on connection failure.
* Returns 0 on success, or -1 upon failure (with an appropriate
* error message displayed.)
*/
int
ftp_connect(int sock, const struct sockaddr *name, socklen_t namelen, int pe)
{
int flags, rv, timeout, error;
socklen_t slen;
struct timeval endtime, now, td;
struct pollfd pfd[1];
char hname[NI_MAXHOST];
char sname[NI_MAXSERV];
setupsockbufsize(sock);
if (getnameinfo(name, namelen,
hname, sizeof(hname), sname, sizeof(sname),
NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
strlcpy(hname, "?", sizeof(hname));
strlcpy(sname, "?", sizeof(sname));
}
if (bindai != NULL) { /* bind to specific addr */
struct addrinfo *ai;
for (ai = bindai; ai != NULL; ai = ai->ai_next) {
if (ai->ai_family == name->sa_family)
break;
}
if (ai == NULL)
ai = bindai;
if (bind(sock, ai->ai_addr, ai->ai_addrlen) == -1) {
char bname[NI_MAXHOST];
int saveerr;
saveerr = errno;
if (getnameinfo(ai->ai_addr, ai->ai_addrlen,
bname, sizeof(bname), NULL, 0, NI_NUMERICHOST) != 0)
strlcpy(bname, "?", sizeof(bname));
errno = saveerr;
warn("Can't bind to `%s'", bname);
return -1;
}
}
/* save current socket flags */
if ((flags = fcntl(sock, F_GETFL, 0)) == -1) {
warn("Can't %s socket flags for connect to `%s:%s'",
"save", hname, sname);
return -1;
}
/* set non-blocking connect */
if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) {
warn("Can't set socket non-blocking for connect to `%s:%s'",
hname, sname);
return -1;
}
/* NOTE: we now must restore socket flags on successful exit */
pfd[0].fd = sock;
pfd[0].events = POLLIN|POLLOUT;
if (quit_time > 0) { /* want a non default timeout */
(void)gettimeofday(&endtime, NULL);
endtime.tv_sec += quit_time; /* determine end time */
}
rv = connect(sock, name, namelen); /* inititate the connection */
if (rv == -1) { /* connection error */
if (errno != EINPROGRESS) { /* error isn't "please wait" */
if (pe || (errno != EHOSTUNREACH))
connecterror:
warn("Can't connect to `%s:%s'", hname, sname);
return -1;
}
/* connect EINPROGRESS; wait */
do {
if (quit_time > 0) { /* determine timeout */
(void)gettimeofday(&now, NULL);
timersub(&endtime, &now, &td);
timeout = (int)(td.tv_sec * 1000
+ td.tv_usec / 1000);
if (timeout < 0)
timeout = 0;
} else {
timeout = INFTIM;
}
pfd[0].revents = 0;
rv = ftp_poll(pfd, 1, timeout);
/* loop until poll !EINTR && !EAGAIN */
} while (rv == -1 && (errno == EINTR || errno == EAGAIN));
if (rv == 0) { /* poll (connect) timed out */
errno = ETIMEDOUT;
goto connecterror;
}
if (rv == -1) { /* poll error */
goto connecterror;
} else if (pfd[0].revents & (POLLIN|POLLOUT)) {
slen = sizeof(error); /* OK, or pending error */
if (getsockopt(sock, SOL_SOCKET, SO_ERROR,
&error, &slen) == -1) {
/* Solaris pending error */
goto connecterror;
} else if (error != 0) {
errno = error; /* BSD pending error */
goto connecterror;
}
} else {
errno = EBADF; /* this shouldn't happen ... */
goto connecterror;
}
}
if (fcntl(sock, F_SETFL, flags) == -1) {
/* restore socket flags */
warn("Can't %s socket flags for connect to `%s:%s'",
"restore", hname, sname);
return -1;
}
return 0;
}
/*
* Internal version of listen(2); sets socket buffer sizes first.
*/
int
ftp_listen(int sock, int backlog)
{
setupsockbufsize(sock);
return (listen(sock, backlog));
}
/*
* Internal version of poll(2), to allow reimplementation by select(2)
* on platforms without the former.
*/
int
ftp_poll(struct pollfd *fds, int nfds, int timeout)
{
return poll(fds, nfds, timeout);
}
/*
* Evaluate a "boolean" string, accept only "1" as true and "0" as false
* Anything else returns the default value.
* Warn about an invalid value that isn't empty.
*/
int
ftp_truthy(const char *name, const char *str, int defvalue)
{
if (strcmp(str, "1") == 0)
return 1;
else if (strcmp(str, "0") == 0)
return 0;
if (*str)
warn("Option %s must be boolean (1 or 0)\n", name);
return defvalue;
}
#ifndef SMALL
/*
* malloc() with inbuilt error checking
*/
void *
ftp_malloc(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 *
ftp_sl_init(void)
{
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
ftp_sl_add(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 *
ftp_strdup(const char *str)
{
char *s;
if (str == NULL)
errx(1, "ftp_strdup: called with NULL argument");
s = strdup(str);
if (s == NULL)
err(1, "Unable to allocate memory for string copy");
return (s);
}
#endif
