/* $NetBSD: util.c,v 1.164.2.4 2024/12/02 10:19:39 martin 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 #ifndef lint __RCSID("$NetBSD: util.c,v 1.164.2.4 2024/12/02 10:19:39 martin Exp $"); #endif /* not lint */ /* * FTP User Program -- Misc support routines */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 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