1 /* $OpenBSD: scp.c,v 1.141 2006/04/01 05:50:29 djm Exp $ */
3 * scp - secure remote copy. This is basically patched BSD rcp which
4 * uses ssh to do the data transfer (instead of using rcmd).
6 * NOTE: This version should NOT be suid root. (This uses ssh to
7 * do the transfer and ssh has the necessary privileges.)
9 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
11 * As far as I am concerned, the code I have written for this software
12 * can be used freely for any purpose. Any derived versions of this
13 * software must be clearly marked as such, and if the derived work is
14 * incompatible with the protocol description in the RFC file, it must be
15 * called by a name other than "ssh" or "Secure Shell".
18 * Copyright (c) 1999 Theo de Raadt. All rights reserved.
19 * Copyright (c) 1999 Aaron Campbell. All rights reserved.
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
33 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
39 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 * Copyright (c) 1983, 1990, 1992, 1993, 1995
46 * The Regents of the University of California. All rights reserved.
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
51 * 1. Redistributions of source code must retain the above copyright
52 * notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 * notice, this list of conditions and the following disclaimer in the
55 * documentation and/or other materials provided with the distribution.
56 * 3. Neither the name of the University nor the names of its contributors
57 * may be used to endorse or promote products derived from this software
58 * without specific prior written permission.
60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
76 #include <sys/types.h>
77 #ifdef HAVE_SYS_STAT_H
78 # include <sys/stat.h>
88 #include "pathnames.h"
91 #include "progressmeter.h"
93 extern char *__progname;
95 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
99 /* Struct for addargs */
102 /* Bandwidth limit */
103 off_t limit_rate = 0;
105 /* Name of current file being transferred. */
108 /* This is set to non-zero to enable verbose mode. */
109 int verbose_mode = 0;
111 /* This is set to zero if the progressmeter is not desired. */
112 int showprogress = 1;
114 /* This is the program to execute for the secured connection. ("ssh" or -S) */
115 char *ssh_program = _PATH_SSH_PROGRAM;
117 /* This is used to store the pid of ssh_program */
118 pid_t do_cmd_pid = -1;
123 if (do_cmd_pid > 1) {
124 kill(do_cmd_pid, signo ? signo : SIGTERM);
125 waitpid(do_cmd_pid, NULL, 0);
134 do_local_cmd(arglist *a)
141 fatal("do_local_cmd: no arguments");
144 fprintf(stderr, "Executing:");
145 for (i = 0; i < a->num; i++)
146 fprintf(stderr, " %s", a->list[i]);
147 fprintf(stderr, "\n");
149 if ((pid = fork()) == -1)
150 fatal("do_local_cmd: fork: %s", strerror(errno));
153 execvp(a->list[0], a->list);
159 signal(SIGTERM, killchild);
160 signal(SIGINT, killchild);
161 signal(SIGHUP, killchild);
163 while (waitpid(pid, &status, 0) == -1)
165 fatal("do_local_cmd: waitpid: %s", strerror(errno));
169 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
176 * This function executes the given command as the specified user on the
177 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
178 * assigns the input and output file descriptors on success.
182 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
184 int pin[2], pout[2], reserved[2];
188 "Executing: program %s host %s, user %s, command %s\n",
190 remuser ? remuser : "(unspecified)", cmd);
193 * Reserve two descriptors so that the real pipes won't get
194 * descriptors 0 and 1 because that will screw up dup2 below.
198 /* Create a socket pair for communicating with ssh. */
200 fatal("pipe: %s", strerror(errno));
202 fatal("pipe: %s", strerror(errno));
204 /* Free the reserved descriptors. */
208 /* Fork a child to execute the command on the remote host using ssh. */
210 if (do_cmd_pid == 0) {
219 replacearg(&args, 0, "%s", ssh_program);
221 addargs(&args, "-l%s", remuser);
222 addargs(&args, "%s", host);
223 addargs(&args, "%s", cmd);
225 execvp(ssh_program, args.list);
228 } else if (do_cmd_pid == -1) {
229 fatal("fork: %s", strerror(errno));
231 /* Parent. Close the other side, and return the local side. */
236 signal(SIGTERM, killchild);
237 signal(SIGINT, killchild);
238 signal(SIGHUP, killchild);
247 BUF *allocbuf(BUF *, int, int);
250 void run_err(const char *,...);
251 void verifydir(char *);
255 int errs, remin, remout;
256 int pflag, iamremote, iamrecursive, targetshouldbedirectory;
259 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
262 void rsource(char *, struct stat *);
263 void sink(int, char *[]);
264 void source(int, char *[]);
265 void tolocal(int, char *[]);
266 void toremote(char *, int, char *[]);
270 main(int argc, char **argv)
272 int ch, fflag, tflag, status;
278 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
281 __progname = ssh_get_progname(argv[0]);
283 memset(&args, '\0', sizeof(args));
285 addargs(&args, "%s", ssh_program);
286 addargs(&args, "-x");
287 addargs(&args, "-oForwardAgent no");
288 addargs(&args, "-oPermitLocalCommand no");
289 addargs(&args, "-oClearAllForwardings yes");
292 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
294 /* User-visible flags. */
300 addargs(&args, "-%c", ch);
306 addargs(&args, "-%c%s", ch, optarg);
309 addargs(&args, "-p%s", optarg);
312 addargs(&args, "-oBatchmode yes");
315 speed = strtod(optarg, &endp);
316 if (speed <= 0 || *endp != '\0')
318 limit_rate = speed * 1024;
327 ssh_program = xstrdup(optarg);
330 addargs(&args, "-v");
334 addargs(&args, "-q");
338 /* Server options. */
340 targetshouldbedirectory = 1;
342 case 'f': /* "from" */
350 setmode(0, O_BINARY);
359 if ((pwd = getpwuid(userid = getuid())) == NULL)
360 fatal("unknown user %u", (u_int) userid);
362 if (!isatty(STDERR_FILENO))
365 remin = STDIN_FILENO;
366 remout = STDOUT_FILENO;
369 /* Follow "protocol", send data. */
382 targetshouldbedirectory = 1;
386 /* Command to be executed on remote system using "ssh". */
387 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
388 verbose_mode ? " -v" : "",
389 iamrecursive ? " -r" : "", pflag ? " -p" : "",
390 targetshouldbedirectory ? " -d" : "");
392 (void) signal(SIGPIPE, lostconn);
394 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
395 toremote(targ, argc, argv);
397 if (targetshouldbedirectory)
398 verifydir(argv[argc - 1]);
399 tolocal(argc, argv); /* Dest is local host. */
402 * Finally check the exit status of the ssh process, if one was forked
403 * and no error has occured yet
405 if (do_cmd_pid != -1 && errs == 0) {
409 (void) close(remout);
410 if (waitpid(do_cmd_pid, &status, 0) == -1)
413 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
421 toremote(char *targ, int argc, char **argv)
423 char *bp, *host, *src, *suser, *thost, *tuser, *arg;
427 memset(&alist, '\0', sizeof(alist));
434 arg = xstrdup(argv[argc - 1]);
435 if ((thost = strrchr(arg, '@'))) {
446 if (tuser != NULL && !okname(tuser)) {
451 for (i = 0; i < argc - 1; i++) {
452 src = colon(argv[i]);
453 if (src) { /* remote to remote */
455 addargs(&alist, "%s", ssh_program);
457 addargs(&alist, "-v");
458 addargs(&alist, "-x");
459 addargs(&alist, "-oClearAllForwardings yes");
460 addargs(&alist, "-n");
465 host = strrchr(argv[i], '@');
469 host = cleanhostname(host);
472 suser = pwd->pw_name;
473 else if (!okname(suser))
475 addargs(&alist, "-l");
476 addargs(&alist, "%s", suser);
478 host = cleanhostname(argv[i]);
480 addargs(&alist, "%s", host);
481 addargs(&alist, "%s", cmd);
482 addargs(&alist, "%s", src);
483 addargs(&alist, "%s%s%s:%s",
484 tuser ? tuser : "", tuser ? "@" : "",
486 if (do_local_cmd(&alist) != 0)
488 } else { /* local to remote */
490 xasprintf(&bp, "%s -t %s", cmd, targ);
491 host = cleanhostname(thost);
492 if (do_cmd(host, tuser, bp, &remin,
505 tolocal(int argc, char **argv)
507 char *bp, *host, *src, *suser;
511 memset(&alist, '\0', sizeof(alist));
514 for (i = 0; i < argc - 1; i++) {
515 if (!(src = colon(argv[i]))) { /* Local to local. */
517 addargs(&alist, "%s", _PATH_CP);
519 addargs(&alist, "-r");
521 addargs(&alist, "-p");
522 addargs(&alist, "%s", argv[i]);
523 addargs(&alist, "%s", argv[argc-1]);
524 if (do_local_cmd(&alist))
531 if ((host = strrchr(argv[i], '@')) == NULL) {
538 suser = pwd->pw_name;
540 host = cleanhostname(host);
541 xasprintf(&bp, "%s -f %s", cmd, src);
542 if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
548 sink(1, argv + argc - 1);
555 source(int argc, char **argv)
560 off_t i, amt, statbytes;
562 int fd = -1, haderr, indx;
563 char *last, *name, buf[2048];
566 for (indx = 0; indx < argc; ++indx) {
570 while (len > 1 && name[len-1] == '/')
572 if (strchr(name, '\n') != NULL) {
573 run_err("%s: skipping, filename contains a newline",
577 if ((fd = open(name, O_RDONLY, 0)) < 0)
579 if (fstat(fd, &stb) < 0) {
580 syserr: run_err("%s: %s", name, strerror(errno));
583 switch (stb.st_mode & S_IFMT) {
593 run_err("%s: not a regular file", name);
596 if ((last = strrchr(name, '/')) == NULL)
603 * Make it compatible with possible future
604 * versions expecting microseconds.
606 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
607 (u_long) stb.st_mtime,
608 (u_long) stb.st_atime);
609 (void) atomicio(vwrite, remout, buf, strlen(buf));
613 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
614 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
615 (u_int) (stb.st_mode & FILEMODEMASK),
616 (long long)stb.st_size, last);
618 fprintf(stderr, "Sending file modes: %s", buf);
620 (void) atomicio(vwrite, remout, buf, strlen(buf));
623 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
624 next: if (fd != -1) {
631 start_progress_meter(curfile, stb.st_size, &statbytes);
632 /* Keep writing after an error so that we stay sync'd up. */
633 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
635 if (i + amt > stb.st_size)
636 amt = stb.st_size - i;
638 result = atomicio(read, fd, bp->buf, amt);
643 (void) atomicio(vwrite, remout, bp->buf, amt);
645 result = atomicio(vwrite, remout, bp->buf, amt);
654 stop_progress_meter();
657 if (close(fd) < 0 && !haderr)
662 (void) atomicio(vwrite, remout, "", 1);
664 run_err("%s: %s", name, strerror(haderr));
670 rsource(char *name, struct stat *statp)
674 char *last, *vect[1], path[1100];
676 if (!(dirp = opendir(name))) {
677 run_err("%s: %s", name, strerror(errno));
680 last = strrchr(name, '/');
686 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
687 (u_long) statp->st_mtime,
688 (u_long) statp->st_atime);
689 (void) atomicio(vwrite, remout, path, strlen(path));
690 if (response() < 0) {
695 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
696 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
698 fprintf(stderr, "Entering directory: %s", path);
699 (void) atomicio(vwrite, remout, path, strlen(path));
700 if (response() < 0) {
704 while ((dp = readdir(dirp)) != NULL) {
707 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
709 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
710 run_err("%s/%s: name too long", name, dp->d_name);
713 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
717 (void) closedir(dirp);
718 (void) atomicio(vwrite, remout, "E\n", 2);
725 static struct timeval bwstart, bwend;
726 static int lamt, thresh = 16384;
728 struct timespec ts, rm;
730 if (!timerisset(&bwstart)) {
731 gettimeofday(&bwstart, NULL);
739 gettimeofday(&bwend, NULL);
740 timersub(&bwend, &bwstart, &bwend);
741 if (!timerisset(&bwend))
745 waitlen = (double)1000000L * lamt / limit_rate;
747 bwstart.tv_sec = waitlen / 1000000L;
748 bwstart.tv_usec = waitlen % 1000000L;
750 if (timercmp(&bwstart, &bwend, >)) {
751 timersub(&bwstart, &bwend, &bwend);
753 /* Adjust the wait time */
758 } else if (bwend.tv_usec < 100) {
764 TIMEVAL_TO_TIMESPEC(&bwend, &ts);
765 while (nanosleep(&ts, &rm) == -1) {
773 gettimeofday(&bwstart, NULL);
777 sink(int argc, char **argv)
787 int amt, exists, first, ofd;
788 mode_t mode, omode, mask;
789 off_t size, statbytes;
790 int setimes, targisdir, wrerrno = 0;
791 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
792 struct timeval tv[2];
796 #define SCREWUP(str) { why = str; goto screwup; }
798 setimes = targisdir = 0;
803 run_err("ambiguous target");
807 if (targetshouldbedirectory)
810 (void) atomicio(vwrite, remout, "", 1);
811 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
813 for (first = 1;; first = 0) {
815 if (atomicio(read, remin, cp, 1) != 1)
818 SCREWUP("unexpected <newline>");
820 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
821 SCREWUP("lost connection");
823 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
826 fprintf(stderr, "Sink: %s", buf);
828 if (buf[0] == '\01' || buf[0] == '\02') {
830 (void) atomicio(vwrite, STDERR_FILENO,
831 buf + 1, strlen(buf + 1));
838 (void) atomicio(vwrite, remout, "", 1);
848 mtime.tv_sec = strtol(cp, &cp, 10);
849 if (!cp || *cp++ != ' ')
850 SCREWUP("mtime.sec not delimited");
851 mtime.tv_usec = strtol(cp, &cp, 10);
852 if (!cp || *cp++ != ' ')
853 SCREWUP("mtime.usec not delimited");
854 atime.tv_sec = strtol(cp, &cp, 10);
855 if (!cp || *cp++ != ' ')
856 SCREWUP("atime.sec not delimited");
857 atime.tv_usec = strtol(cp, &cp, 10);
858 if (!cp || *cp++ != '\0')
859 SCREWUP("atime.usec not delimited");
860 (void) atomicio(vwrite, remout, "", 1);
863 if (*cp != 'C' && *cp != 'D') {
865 * Check for the case "rcp remote:foo\* local:bar".
866 * In this case, the line "No match." can be returned
867 * by the shell before the rcp command on the remote is
868 * executed so the ^Aerror_message convention isn't
875 SCREWUP("expected control record");
878 for (++cp; cp < buf + 5; cp++) {
879 if (*cp < '0' || *cp > '7')
881 mode = (mode << 3) | (*cp - '0');
884 SCREWUP("mode not delimited");
886 for (size = 0; isdigit(*cp);)
887 size = size * 10 + (*cp++ - '0');
889 SCREWUP("size not delimited");
890 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
891 run_err("error: unexpected filename: %s", cp);
895 static char *namebuf;
896 static size_t cursize;
899 need = strlen(targ) + strlen(cp) + 250;
900 if (need > cursize) {
903 namebuf = xmalloc(need);
906 (void) snprintf(namebuf, need, "%s%s%s", targ,
907 strcmp(targ, "/") ? "/" : "", cp);
912 exists = stat(np, &stb) == 0;
914 int mod_flag = pflag;
916 SCREWUP("received directory without -r");
918 if (!S_ISDIR(stb.st_mode)) {
923 (void) chmod(np, mode);
925 /* Handle copying from a read-only
928 if (mkdir(np, mode | S_IRWXU) < 0)
931 vect[0] = xstrdup(np);
935 if (utimes(vect[0], tv) < 0)
936 run_err("%s: set times: %s",
937 vect[0], strerror(errno));
940 (void) chmod(vect[0], mode);
947 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
948 bad: run_err("%s: %s", np, strerror(errno));
951 (void) atomicio(vwrite, remout, "", 1);
952 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
961 start_progress_meter(curfile, size, &statbytes);
962 for (count = i = 0; i < size; i += 4096) {
968 j = atomicio(read, remin, cp, amt);
970 run_err("%s", j ? strerror(errno) :
971 "dropped connection");
982 if (count == bp->cnt) {
983 /* Keep reading so we stay sync'd up. */
985 if (atomicio(vwrite, ofd, bp->buf,
996 stop_progress_meter();
997 if (count != 0 && wrerr == NO &&
998 atomicio(vwrite, ofd, bp->buf, count) != count) {
1002 if (wrerr == NO && ftruncate(ofd, size) != 0) {
1003 run_err("%s: truncate: %s", np, strerror(errno));
1007 if (exists || omode != mode)
1009 if (fchmod(ofd, omode)) {
1010 #else /* HAVE_FCHMOD */
1011 if (chmod(np, omode)) {
1012 #endif /* HAVE_FCHMOD */
1013 run_err("%s: set mode: %s",
1014 np, strerror(errno));
1018 if (!exists && omode != mode)
1020 if (fchmod(ofd, omode & ~mask)) {
1021 #else /* HAVE_FCHMOD */
1022 if (chmod(np, omode & ~mask)) {
1023 #endif /* HAVE_FCHMOD */
1024 run_err("%s: set mode: %s",
1025 np, strerror(errno));
1029 if (close(ofd) == -1) {
1034 if (setimes && wrerr == NO) {
1036 if (utimes(np, tv) < 0) {
1037 run_err("%s: set times: %s",
1038 np, strerror(errno));
1044 run_err("%s: %s", np, strerror(wrerrno));
1047 (void) atomicio(vwrite, remout, "", 1);
1054 run_err("protocol error: %s", why);
1061 char ch, *cp, resp, rbuf[2048];
1063 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1073 case 1: /* error, followed by error msg */
1074 case 2: /* fatal error, "" */
1076 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1079 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1082 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1094 (void) fprintf(stderr,
1095 "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1096 " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1097 " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1102 run_err(const char *fmt,...)
1108 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1109 (void) fprintf(fp, "%c", 0x01);
1110 (void) fprintf(fp, "scp: ");
1112 (void) vfprintf(fp, fmt, ap);
1114 (void) fprintf(fp, "\n");
1120 vfprintf(stderr, fmt, ap);
1122 fprintf(stderr, "\n");
1131 if (!stat(cp, &stb)) {
1132 if (S_ISDIR(stb.st_mode))
1136 run_err("%s: %s", cp, strerror(errno));
1151 if (!isalpha(c) && !isdigit(c)) {
1166 bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1171 allocbuf(BUF *bp, int fd, int blksize)
1174 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1177 if (fstat(fd, &stb) < 0) {
1178 run_err("fstat: %s", strerror(errno));
1181 size = roundup(stb.st_blksize, blksize);
1184 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1186 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1187 if (bp->cnt >= size)
1189 if (bp->buf == NULL)
1190 bp->buf = xmalloc(size);
1192 bp->buf = xrealloc(bp->buf, 1, size);
1193 memset(bp->buf, 0, size);
1202 write(STDERR_FILENO, "lost connection\n", 16);