1 /* $NetBSD: util.c,v 1.131 2005/06/29 05:00:30 christos Exp $ */
4 * Copyright (c) 1997-2005 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
12 * NASA Ames Research Center.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 * This product includes software developed by the NetBSD
25 * Foundation, Inc. and its contributors.
26 * 4. Neither the name of The NetBSD Foundation nor the names of its
27 * contributors may be used to endorse or promote products derived
28 * from this software without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
44 * Copyright (c) 1985, 1989, 1993, 1994
45 * The Regents of the University of California. All rights reserved.
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
50 * 1. Redistributions of source code must retain the above copyright
51 * notice, this list of conditions and the following disclaimer.
52 * 2. Redistributions in binary form must reproduce the above copyright
53 * notice, this list of conditions and the following disclaimer in the
54 * documentation and/or other materials provided with the distribution.
55 * 3. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 #include <sys/cdefs.h>
74 __RCSID("$NetBSD: util.c,v 1.131 2005/06/29 05:00:30 christos Exp $");
78 * FTP User Program -- Misc support routines
80 #include <sys/param.h>
81 #include <sys/socket.h>
82 #include <sys/ioctl.h>
84 #include <netinet/in.h>
107 * Connect to peer server and auto-login, if possible.
110 setpeer(int argc, char *argv[])
118 fprintf(ttyout, "Already connected to %s, use close first.\n",
124 (void)another(&argc, &argv, "to");
125 if (argc < 2 || argc > 3) {
127 UPRINTF("usage: %s host-name [port]\n", argv[0]);
139 if (gateserver == NULL || *gateserver == '\0')
140 errx(1, "gateserver not defined (shouldn't happen)");
141 host = hookup(gateserver, port);
143 host = hookup(argv[1], port);
146 if (gatemode && verbose) {
148 "Connecting via pass-through server %s\n",
154 * Set up defaults for FTP.
156 (void)strlcpy(typename, "ascii", sizeof(typename));
159 (void)strlcpy(formname, "non-print", sizeof(formname));
161 (void)strlcpy(modename, "stream", sizeof(modename));
163 (void)strlcpy(structname, "file", sizeof(structname));
165 (void)strlcpy(bytename, "8", sizeof(bytename));
168 (void)ftp_login(argv[1], NULL, NULL);
173 parse_feat(const char *line)
177 * work-around broken ProFTPd servers that can't
178 * even obey RFC 2389.
180 while (*line && isspace((int)*line))
183 if (strcasecmp(line, "MDTM") == 0)
184 features[FEAT_MDTM] = 1;
185 else if (strncasecmp(line, "MLST", sizeof("MLST") - 1) == 0) {
186 features[FEAT_MLST] = 1;
187 } else if (strcasecmp(line, "REST STREAM") == 0)
188 features[FEAT_REST_STREAM] = 1;
189 else if (strcasecmp(line, "SIZE") == 0)
190 features[FEAT_SIZE] = 1;
191 else if (strcasecmp(line, "TVFS") == 0)
192 features[FEAT_TVFS] = 1;
196 * Determine the remote system type (SYST) and features (FEAT).
197 * Call after a successful login (i.e, connected = -1)
208 /* determine remote system type */
209 if (command("SYST") == COMPLETE) {
214 cp = strchr(reply_string + 4, ' ');
216 cp = strchr(reply_string + 4, '\r');
224 fprintf(ttyout, "Remote system type is %s.\n",
229 if (!strncmp(reply_string, "215 UNIX Type: L8", 17)) {
235 * Set type to 0 (not specified by user),
236 * meaning binary by default, but don't bother
237 * telling server. We can use binary
238 * for text files unless changed by the user.
241 (void)strlcpy(typename, "binary", sizeof(typename));
244 "Using %s mode to transfer files.\n",
252 !strncmp(reply_string, "215 TOPS20", 10))
254 "Remember to set tenex mode when transferring binary files from this machine.\n",
259 /* determine features (if any) */
260 for (i = 0; i < FEAT_max; i++)
262 reply_callback = parse_feat;
263 if (command("FEAT") == COMPLETE) {
264 for (i = 0; i < FEAT_max; i++) {
265 if (features[i] == -1)
268 features[FEAT_FEAT] = 1;
270 features[FEAT_FEAT] = 0;
273 #define DEBUG_FEAT(x) fprintf(ttyout, "features[" #x "] = %d\n", features[(x)])
274 DEBUG_FEAT(FEAT_FEAT);
275 DEBUG_FEAT(FEAT_MDTM);
276 DEBUG_FEAT(FEAT_MLST);
277 DEBUG_FEAT(FEAT_REST_STREAM);
278 DEBUG_FEAT(FEAT_SIZE);
279 DEBUG_FEAT(FEAT_TVFS);
283 reply_callback = NULL;
289 * Reset the various variables that indicate connection state back to
290 * disconnected settings.
291 * The caller is responsible for issuing any commands to the remote server
292 * to perform a clean shutdown before this is invoked.
305 * determine if anonftp was specifically set with -a
306 * (1), or implicitly set by auto_fetch() (2). in the
307 * latter case, disable after the current xfer
321 * Top-level signal handler for interrupted commands.
330 write(fileno(ttyout), "\n", 1);
331 siglongjmp(toplevel, 1);
335 * Signal handler for lost connections; cleanup various elements of
336 * the connection state, and call cleanuppeer() to finish it off.
346 (void)shutdown(fileno(cout), 1+1);
351 (void)shutdown(data, 1+1);
360 (void)shutdown(fileno(cout), 1+1);
374 * Login to remote host, using given username & password if supplied.
375 * Return non-zero if successful.
378 ftp_login(const char *host, const char *luser, const char *lpass)
381 char *user, *pass, *acct, *p;
382 const char *errormsg;
383 int n, aflag, rval, nlen;
386 user = pass = acct = NULL;
388 user = xstrdup(luser);
390 pass = xstrdup(lpass);
392 DPRINTF("ftp_login: user `%s' pass `%s' host `%s'\n",
393 user ? user : "<null>", pass ? pass : "<null>",
394 host ? host : "<null>");
397 * Set up arguments for an anonymous FTP session, if necessary.
401 user = xstrdup("anonymous"); /* as per RFC 1635 */
403 pass = xstrdup(getoptionvalue("anonpass"));
406 if (ruserpass(host, &user, &pass, &acct) < 0) {
408 goto cleanup_ftp_login;
411 while (user == NULL) {
413 fprintf(ttyout, "Name (%s:%s): ", host, localname);
415 fprintf(ttyout, "Name (%s): ", host);
417 nlen = getline(stdin, tmp, sizeof(tmp), &errormsg);
419 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "login");
421 goto cleanup_ftp_login;
422 } else if (nlen == 0) {
423 user = xstrdup(localname);
433 len = strlen(user) + 1 + strlen(host) + 1;
434 nuser = xmalloc(len);
435 (void)strlcpy(nuser, user, len);
436 (void)strlcat(nuser, "@", len);
437 (void)strlcat(nuser, host, len);
442 n = command("USER %s", user);
445 p = getpass("Password: ");
447 memset(p, 0, strlen(p));
449 n = command("PASS %s", pass);
450 memset(pass, 0, strlen(pass));
455 p = getpass("Account: ");
457 memset(p, 0, strlen(p));
459 if (acct[0] == '\0') {
460 warnx("Login failed.");
461 goto cleanup_ftp_login;
463 n = command("ACCT %s", acct);
464 memset(acct, 0, strlen(acct));
466 if ((n != COMPLETE) ||
467 (!aflag && acct != NULL && command("ACCT %s", acct) != COMPLETE)) {
468 warnx("Login failed.");
469 goto cleanup_ftp_login;
472 username = xstrdup(user);
474 goto cleanup_ftp_login;
478 for (n = 0; n < macnum; ++n) {
479 if (!strcmp("init", macros[n].mac_name)) {
480 (void)strlcpy(line, "$init", sizeof(line));
482 domacro(margc, margv);
492 memset(pass, 0, strlen(pass));
495 memset(acct, 0, strlen(pass));
501 * `another' gets another argument, and stores the new argc and argv.
502 * It reverts to the top level (via intr()) on EOF/error.
504 * Returns false if no new arguments have been added.
507 another(int *pargc, char ***pargv, const char *prompt)
509 const char *errormsg;
514 if (len >= sizeof(line) - 3) {
515 fputs("Sorry, arguments too long.\n", ttyout);
518 fprintf(ttyout, "(%s) ", prompt);
521 nlen = getline(stdin, line + len, sizeof(line)-len, &errormsg);
523 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "operation");
528 ret = margc > *pargc;
535 * glob files given in argv[] from the remote server.
536 * if errbuf isn't NULL, store error messages there instead
537 * of writing to the screen.
540 remglob(char *argv[], int doswitch, const char **errbuf)
542 static char buf[MAXPATHLEN];
543 static FILE *ftemp = NULL;
545 char temp[MAXPATHLEN];
546 int oldverbose, oldhash, oldprogress, fd;
551 if (!mflag || !connected) {
565 if ((cp = *++args) == NULL)
570 len = strlcpy(temp, tmpdir, sizeof(temp));
571 if (temp[len - 1] != '/')
572 (void)strlcat(temp, "/", sizeof(temp));
573 (void)strlcat(temp, TMPFILE, sizeof(temp));
574 if ((fd = mkstemp(temp)) < 0) {
575 warn("unable to create temporary file %s", temp);
579 oldverbose = verbose;
580 verbose = (errbuf != NULL) ? -1 : 0;
582 oldprogress = progress;
587 for (mode = "w"; *++argv != NULL; mode = "a")
588 recvrequest("NLST", temp, *argv, mode, 0, 0);
589 if ((code / 100) != COMPLETE) {
591 *errbuf = reply_string;
595 verbose = oldverbose;
597 progress = oldprogress;
598 ftemp = fopen(temp, "r");
603 "can't find list of remote files, oops.\n",
607 "can't find list of remote files, oops.";
611 if (fgets(buf, sizeof(buf), ftemp) == NULL) {
616 if ((cp = strchr(buf, '\n')) != NULL)
622 * Glob a local file name specification with the expectation of a single
623 * return value. Can't control multiple values being expanded from the
624 * expression, we return only the first.
625 * Returns NULL on error, or a pointer to a buffer containing the filename
626 * that's the caller's responsiblity to free(3) when finished with.
629 globulize(const char *pattern)
636 return (xstrdup(pattern));
638 flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
639 memset(&gl, 0, sizeof(gl));
640 if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) {
641 warnx("%s: not found", pattern);
645 p = xstrdup(gl.gl_pathv[0]);
651 * determine size of remote file
654 remotesize(const char *file, int noisy)
663 if (! features[FEAT_SIZE]) {
666 "SIZE is not supported by remote server.\n");
667 goto cleanup_remotesize;
669 r = command("SIZE %s", file);
673 cp = strchr(reply_string, ' ');
676 size = STRTOLL(cp, &ep, 10);
677 if (*ep != '\0' && !isspace((unsigned char)*ep))
681 if (r == ERROR && code == 500 && features[FEAT_SIZE] == -1)
682 features[FEAT_SIZE] = 0;
683 if (noisy && debug == 0) {
684 fputs(reply_string, ttyout);
694 * determine last modification time (in GMT) of remote file
697 remotemodtime(const char *file, int noisy)
699 int overbose, ocode, r;
707 if (! features[FEAT_MDTM]) {
710 "MDTM is not supported by remote server.\n");
711 goto cleanup_parse_time;
713 r = command("MDTM %s", file);
716 char *timestr, *frac;
717 int yy, mo, day, hour, min, sec;
720 * time-val = 14DIGIT [ "." 1*DIGIT ]
721 * YYYYMMDDHHMMSS[.sss]
722 * mdtm-response = "213" SP time-val CRLF / error-response
724 timestr = reply_string + 4;
728 * XXX: ignored for now
730 frac = strchr(timestr, '\r');
733 frac = strchr(timestr, '.');
736 if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) {
738 * XXX: Workaround for lame ftpd's that return
739 * `19100' instead of `2000'
742 "Y2K warning! Incorrect time-val `%s' received from server.\n",
747 fprintf(ttyout, "Converted to `%s'\n", timestr);
749 if (strlen(timestr) != 14 ||
750 sscanf(timestr, "%04d%02d%02d%02d%02d%02d",
751 &yy, &mo, &day, &hour, &min, &sec) != 6) {
753 fprintf(ttyout, "Can't parse time `%s'.\n", timestr);
754 goto cleanup_parse_time;
756 memset(&timebuf, 0, sizeof(timebuf));
757 timebuf.tm_sec = sec;
758 timebuf.tm_min = min;
759 timebuf.tm_hour = hour;
760 timebuf.tm_mday = day;
761 timebuf.tm_mon = mo - 1;
762 timebuf.tm_year = yy - TM_YEAR_BASE;
763 timebuf.tm_isdst = -1;
764 rtime = timegm(&timebuf);
766 if (noisy || debug != 0)
769 goto cleanup_parse_time;
771 DPRINTF("parsed date as: %s", ctime(&rtime));
773 if (r == ERROR && code == 500 && features[FEAT_MDTM] == -1)
774 features[FEAT_MDTM] = 0;
775 if (noisy && debug == 0) {
776 fputs(reply_string, ttyout);
788 * Update global `localcwd', which contains the state of the local cwd
794 if (getcwd(localcwd, sizeof(localcwd)) == NULL)
796 DPRINTF("got localcwd as `%s'\n", localcwd);
800 * Update global `remotecwd', which contains the state of the remote cwd
803 updateremotecwd(void)
805 int overbose, ocode, i;
812 if (command("PWD") != COMPLETE)
814 cp = strchr(reply_string, ' ');
815 if (cp == NULL || cp[0] == '\0' || cp[1] != '"')
818 for (i = 0; *cp && i < sizeof(remotecwd) - 1; i++, cp++) {
828 DPRINTF("got remotecwd as `%s'\n", remotecwd);
829 goto cleanupremotecwd;
838 * Ensure file is in or under dir.
839 * Returns 1 if so, 0 if not (or an error occurred).
842 fileindir(const char *file, const char *dir)
844 char parentdirbuf[PATH_MAX+1], *parentdir;
845 char realdir[PATH_MAX+1];
848 /* determine parent directory of file */
849 (void)strlcpy(parentdirbuf, file, sizeof(parentdirbuf));
850 parentdir = dirname(parentdirbuf);
851 if (strcmp(parentdir, ".") == 0)
852 return 1; /* current directory is ok */
854 /* find the directory */
855 if (realpath(parentdir, realdir) == NULL) {
856 warn("Unable to determine real path of `%s'", parentdir);
859 if (realdir[0] != '/') /* relative result is ok */
861 dirlen = strlen(dir);
863 printf("file %s parent %s realdir %s dir %s [%d]\n",
864 file, parentdir, realdir, dir, dirlen);
866 if (strncmp(realdir, dir, dirlen) == 0 &&
867 (realdir[dirlen] == '/' || realdir[dirlen] == '\0'))
873 * List words in stringlist, vertically arranged
876 list_vertical(StringList *sl)
885 for (i = 0 ; i < sl->sl_cur ; i++) {
886 w = strlen(sl->sl_str[i]);
890 width = (width + 8) &~ 7;
892 columns = ttywidth / width;
895 lines = (sl->sl_cur + columns - 1) / columns;
896 for (i = 0; i < lines; i++) {
897 for (j = 0; j < columns; j++) {
898 p = sl->sl_str[j * lines + i];
901 if (j * lines + i + lines >= sl->sl_cur) {
908 (void)putc('\t', ttyout);
915 * Update the global ttywidth value, using TIOCGWINSZ.
920 struct winsize winsize;
923 if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 &&
925 ttywidth = winsize.ws_col;
932 * Change the rate limit up (SIGUSR1) or down (SIGUSR2)
941 rate_get += rate_get_incr;
943 rate_put += rate_put_incr;
946 if (rate_get && rate_get > rate_get_incr)
947 rate_get -= rate_get_incr;
948 if (rate_put && rate_put > rate_put_incr)
949 rate_put -= rate_put_incr;
952 err(1, "crankrate invoked with unknown signal: %d", sig);
958 * Setup or cleanup EditLine structures
960 #ifndef NO_EDITCOMPLETE
964 if (editing && el == NULL && hist == NULL) {
968 el = el_init(getprogname(), stdin, ttyout, stderr);
970 hist = history_init(); /* init the builtin history */
971 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */
972 el_set(el, EL_HIST, history, hist); /* use history */
974 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */
975 el_set(el, EL_PROMPT, prompt); /* set the prompt functions */
976 el_set(el, EL_RPROMPT, rprompt);
978 /* add local file completion, bind to TAB */
979 el_set(el, EL_ADDFN, "ftp-complete",
980 "Context sensitive argument completion",
982 el_set(el, EL_BIND, "^I", "ftp-complete", NULL);
983 el_source(el, NULL); /* read ~/.editrc */
984 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0)
985 editing = 0; /* the user doesn't want editing,
986 * so disable, and let statement
989 el_set(el, EL_SIGNAL, 1);
1002 #endif /* !NO_EDITCOMPLETE */
1005 * Convert the string `arg' to an int, which may have an optional SI suffix
1006 * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise.
1009 strsuftoi(const char *arg)
1014 if (!isdigit((unsigned char)arg[0]))
1017 val = strtol(arg, &cp, 10);
1019 if (cp[0] != '\0' && cp[1] != '\0')
1021 switch (tolower((unsigned char)cp[0])) {
1038 if (val < 0 || val > INT_MAX)
1045 * Set up socket buffer sizes before a connection is made.
1048 setupsockbufsize(int sock)
1051 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
1052 (void *)&sndbuf_size, sizeof(sndbuf_size)) == -1)
1053 warn("unable to set sndbuf size %d", sndbuf_size);
1055 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
1056 (void *)&rcvbuf_size, sizeof(rcvbuf_size)) == -1)
1057 warn("unable to set rcvbuf size %d", rcvbuf_size);
1061 * Copy characters from src into dst, \ quoting characters that require it
1064 ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen)
1069 src[si] != '\0' && di < dstlen && si < srclen;
1090 * Copy src into buf (which is len bytes long), expanding % sequences.
1093 formatbuf(char *buf, size_t len, const char *src)
1095 const char *p, *p2, *q;
1096 int i, op, updirs, pdirs;
1098 #define ADDBUF(x) do { \
1105 for (i = 0; *p; p++) {
1117 p2 = connected ? remotecwd : "";
1120 /* option to determine fixed # of dirs from path */
1121 if (op == '.' || op == 'c') {
1125 while (*p2) /* calc # of /'s */
1128 if (p[1] == '0') { /* print <x> or ... */
1132 if (p[1] >= '1' && p[1] <= '9') {
1133 /* calc # to skip */
1140 while (skip-- > 0) {
1141 while ((p2 > q) && (*p2 != '/'))
1146 if (*p2 == '/' && p2 != q)
1150 if (updirs > 0 && pdirs) {
1164 ADDBUF('0' + updirs);
1174 for (p2 = connected && hostname ? hostname : "-";
1176 if (op == 'm' && *p2 == '.')
1183 for (p2 = connected ? username : "-"; *p2 ; p2++)
1191 default: /* display unknown codes literally */
1203 * Parse `port' into a TCP port number, defaulting to `defport' if `port' is
1204 * an unknown service name. If defport != -1, print a warning upon bad parse.
1207 parseport(const char *port, int defport)
1214 nport = strtol(p, &ep, 10);
1215 if (*ep != '\0' && ep == p) {
1216 struct servent *svp;
1218 svp = getservbyname(port, "tcp");
1222 warnx("Unknown port `%s', using port %d",
1226 rv = ntohs(svp->s_port);
1227 } else if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0')
1236 * Determine if given string is an IPv6 address or not.
1237 * Return 1 for yes, 0 for no
1240 isipv6addr(const char *addr)
1244 struct addrinfo hints, *res;
1246 memset(&hints, 0, sizeof(hints));
1247 hints.ai_family = PF_INET6;
1248 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1249 hints.ai_flags = AI_NUMERICHOST;
1250 if (getaddrinfo(addr, "0", &hints, &res) != 0)
1256 DPRINTF("isipv6addr: got %d for %s\n", rv, addr);
1258 return (rv == 1) ? 1 : 0;
1262 * Read a line from the FILE stream into buf/buflen using fgets(), so up
1263 * to buflen-1 chars will be read and the result will be NUL terminated.
1264 * If the line has a trailing newline it will be removed.
1265 * If the line is too long, excess characters will be read until
1266 * newline/EOF/error.
1267 * If EOF/error occurs or a too-long line is encountered and errormsg
1268 * isn't NULL, it will be changed to a description of the problem.
1269 * (The EOF message has a leading \n for cosmetic purposes).
1271 * >=0 length of line (excluding trailing newline) if all ok
1273 * -2 EOF encountered
1274 * -3 line was too long
1277 getline(FILE *stream, char *buf, size_t buflen, const char **errormsg)
1282 if (fgets(buf, buflen, stream) == NULL) {
1283 if (feof(stream)) { /* EOF */
1286 *errormsg = "\nEOF received";
1287 } else { /* error */
1290 *errormsg = "Error encountered";
1296 if (buf[len-1] == '\n') { /* clear any trailing newline */
1298 } else if (len == buflen-1) { /* line too long */
1299 while ((ch = getchar()) != '\n' && ch != EOF)
1302 *errormsg = "Input line is too long";
1313 * Internal version of connect(2); sets socket buffer sizes first and
1314 * supports a connection timeout using a non-blocking connect(2) with
1316 * Socket fcntl flags are temporarily updated to include O_NONBLOCK;
1317 * these will not be reverted on connection failure.
1318 * Returns -1 upon failure (with errno set to the problem), or 0 on success.
1321 xconnect(int sock, const struct sockaddr *name, socklen_t namelen)
1323 int flags, rv, timeout, error;
1325 struct timeval endtime, now, td;
1326 struct pollfd pfd[1];
1328 setupsockbufsize(sock);
1330 if ((flags = fcntl(sock, F_GETFL, 0)) == -1)
1331 return -1; /* get current socket flags */
1332 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
1333 return -1; /* set non-blocking connect */
1335 /* NOTE: we now must restore socket flags on successful exit */
1338 pfd[0].events = POLLIN|POLLOUT;
1340 if (quit_time > 0) { /* want a non default timeout */
1341 (void)gettimeofday(&endtime, NULL);
1342 endtime.tv_sec += quit_time; /* determine end time */
1345 rv = connect(sock, name, namelen); /* inititate the connection */
1346 if (rv == -1) { /* connection error */
1347 if (errno != EINPROGRESS) /* error isn't "please wait" */
1350 /* connect EINPROGRESS; wait */
1352 if (quit_time > 0) { /* determine timeout */
1353 (void)gettimeofday(&now, NULL);
1354 timersub(&endtime, &now, &td);
1355 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1362 rv = xpoll(pfd, 1, timeout);
1363 /* loop until poll ! EINTR */
1364 } while (rv == -1 && errno == EINTR);
1366 if (rv == 0) { /* poll (connect) timed out */
1371 if (rv == -1) { /* poll error */
1373 } else if (pfd[0].revents & (POLLIN|POLLOUT)) {
1374 slen = sizeof(error); /* OK, or pending error */
1375 if (getsockopt(sock, SOL_SOCKET, SO_ERROR,
1376 &error, &slen) == -1)
1377 return -1; /* Solaris pending error */
1379 errno = error; /* BSD pending error */
1383 errno = EBADF; /* this shouldn't happen ... */
1388 if (fcntl(sock, F_SETFL, flags) == -1) /* restore socket flags */
1394 * Internal version of listen(2); sets socket buffer sizes first.
1397 xlisten(int sock, int backlog)
1400 setupsockbufsize(sock);
1401 return (listen(sock, backlog));
1405 * Internal version of poll(2), to allow reimplementation by select(2)
1406 * on platforms without the former.
1409 xpoll(struct pollfd *fds, int nfds, int timeout)
1411 return poll(fds, nfds, timeout);
1415 * malloc() with inbuilt error checking
1418 xmalloc(size_t size)
1424 err(1, "Unable to allocate %ld bytes of memory", (long)size);
1429 * sl_init() with inbuilt error checking
1438 err(1, "Unable to allocate memory for stringlist");
1443 * sl_add() with inbuilt error checking
1446 xsl_add(StringList *sl, char *i)
1449 if (sl_add(sl, i) == -1)
1450 err(1, "Unable to add `%s' to stringlist", i);
1454 * strdup() with inbuilt error checking
1457 xstrdup(const char *str)
1462 errx(1, "xstrdup() called with NULL argument");
1465 err(1, "Unable to allocate memory for string copy");