1 /* $OpenBSD: scp.c,v 1.139 2006/03/25 13:17:02 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;
97 /* Struct for addargs */
100 /* Bandwidth limit */
101 off_t limit_rate = 0;
103 /* Name of current file being transferred. */
106 /* This is set to non-zero to enable verbose mode. */
107 int verbose_mode = 0;
109 /* This is set to zero if the progressmeter is not desired. */
110 int showprogress = 1;
112 /* This is the program to execute for the secured connection. ("ssh" or -S) */
113 char *ssh_program = _PATH_SSH_PROGRAM;
115 /* This is used to store the pid of ssh_program */
116 pid_t do_cmd_pid = -1;
121 if (do_cmd_pid > 1) {
122 kill(do_cmd_pid, signo ? signo : SIGTERM);
123 waitpid(do_cmd_pid, NULL, 0);
132 do_local_cmd(arglist *a)
139 fatal("do_local_cmd: no arguments");
142 fprintf(stderr, "Executing:");
143 for (i = 0; i < a->num; i++)
144 fprintf(stderr, " %s", a->list[i]);
145 fprintf(stderr, "\n");
147 if ((pid = fork()) == -1)
148 fatal("do_local_cmd: fork: %s", strerror(errno));
151 execvp(a->list[0], a->list);
157 signal(SIGTERM, killchild);
158 signal(SIGINT, killchild);
159 signal(SIGHUP, killchild);
161 while (waitpid(pid, &status, 0) == -1)
163 fatal("do_local_cmd: waitpid: %s", strerror(errno));
167 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
174 * This function executes the given command as the specified user on the
175 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
176 * assigns the input and output file descriptors on success.
180 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
182 int pin[2], pout[2], reserved[2];
186 "Executing: program %s host %s, user %s, command %s\n",
188 remuser ? remuser : "(unspecified)", cmd);
191 * Reserve two descriptors so that the real pipes won't get
192 * descriptors 0 and 1 because that will screw up dup2 below.
196 /* Create a socket pair for communicating with ssh. */
198 fatal("pipe: %s", strerror(errno));
200 fatal("pipe: %s", strerror(errno));
202 /* Free the reserved descriptors. */
206 /* Fork a child to execute the command on the remote host using ssh. */
208 if (do_cmd_pid == 0) {
217 replacearg(&args, 0, "%s", ssh_program);
219 addargs(&args, "-l%s", remuser);
220 addargs(&args, "%s", host);
221 addargs(&args, "%s", cmd);
223 execvp(ssh_program, args.list);
226 } else if (do_cmd_pid == -1) {
227 fatal("fork: %s", strerror(errno));
229 /* Parent. Close the other side, and return the local side. */
234 signal(SIGTERM, killchild);
235 signal(SIGINT, killchild);
236 signal(SIGHUP, killchild);
245 BUF *allocbuf(BUF *, int, int);
249 void run_err(const char *,...);
250 void verifydir(char *);
254 int errs, remin, remout;
255 int pflag, iamremote, iamrecursive, targetshouldbedirectory;
258 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
261 void rsource(char *, struct stat *);
262 void sink(int, char *[]);
263 void source(int, char *[]);
264 void tolocal(int, char *[]);
265 void toremote(char *, int, char *[]);
269 main(int argc, char **argv)
271 int ch, fflag, tflag, status;
277 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
280 __progname = ssh_get_progname(argv[0]);
282 memset(&args, '\0', sizeof(args));
284 addargs(&args, "%s", ssh_program);
285 addargs(&args, "-x");
286 addargs(&args, "-oForwardAgent no");
287 addargs(&args, "-oPermitLocalCommand no");
288 addargs(&args, "-oClearAllForwardings yes");
291 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
293 /* User-visible flags. */
299 addargs(&args, "-%c", ch);
305 addargs(&args, "-%c%s", ch, optarg);
308 addargs(&args, "-p%s", optarg);
311 addargs(&args, "-oBatchmode yes");
314 speed = strtod(optarg, &endp);
315 if (speed <= 0 || *endp != '\0')
317 limit_rate = speed * 1024;
326 ssh_program = xstrdup(optarg);
329 addargs(&args, "-v");
333 addargs(&args, "-q");
337 /* Server options. */
339 targetshouldbedirectory = 1;
341 case 'f': /* "from" */
349 setmode(0, O_BINARY);
358 if ((pwd = getpwuid(userid = getuid())) == NULL)
359 fatal("unknown user %u", (u_int) userid);
361 if (!isatty(STDERR_FILENO))
364 remin = STDIN_FILENO;
365 remout = STDOUT_FILENO;
368 /* Follow "protocol", send data. */
381 targetshouldbedirectory = 1;
385 /* Command to be executed on remote system using "ssh". */
386 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
387 verbose_mode ? " -v" : "",
388 iamrecursive ? " -r" : "", pflag ? " -p" : "",
389 targetshouldbedirectory ? " -d" : "");
391 (void) signal(SIGPIPE, lostconn);
393 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
394 toremote(targ, argc, argv);
396 if (targetshouldbedirectory)
397 verifydir(argv[argc - 1]);
398 tolocal(argc, argv); /* Dest is local host. */
401 * Finally check the exit status of the ssh process, if one was forked
402 * and no error has occured yet
404 if (do_cmd_pid != -1 && errs == 0) {
408 (void) close(remout);
409 if (waitpid(do_cmd_pid, &status, 0) == -1)
412 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
420 toremote(char *targ, int argc, char **argv)
423 char *bp, *host, *src, *suser, *thost, *tuser, *arg;
426 memset(&alist, '\0', sizeof(alist));
433 arg = xstrdup(argv[argc - 1]);
434 if ((thost = strrchr(arg, '@'))) {
445 if (tuser != NULL && !okname(tuser)) {
450 for (i = 0; i < argc - 1; i++) {
451 src = colon(argv[i]);
452 if (src) { /* remote to remote */
454 addargs(&alist, "%s", ssh_program);
456 addargs(&alist, "-v");
457 addargs(&alist, "-x");
458 addargs(&alist, "-oClearAllForwardings yes");
459 addargs(&alist, "-n");
464 host = strrchr(argv[i], '@');
468 host = cleanhostname(host);
471 suser = pwd->pw_name;
472 else if (!okname(suser))
474 addargs(&alist, "-l");
475 addargs(&alist, "%s", suser);
477 host = cleanhostname(argv[i]);
479 addargs(&alist, "%s", host);
480 addargs(&alist, "%s", cmd);
481 addargs(&alist, "%s", src);
482 addargs(&alist, "%s%s%s:%s",
483 tuser ? tuser : "", tuser ? "@" : "",
485 if (do_local_cmd(&alist) != 0)
487 } else { /* local to remote */
489 len = strlen(targ) + CMDNEEDS + 20;
491 (void) snprintf(bp, len, "%s -t %s", cmd, targ);
492 host = cleanhostname(thost);
493 if (do_cmd(host, tuser, bp, &remin,
506 tolocal(int argc, char **argv)
509 char *bp, *host, *src, *suser;
512 memset(&alist, '\0', sizeof(alist));
515 for (i = 0; i < argc - 1; i++) {
516 if (!(src = colon(argv[i]))) { /* Local to local. */
518 addargs(&alist, "%s", _PATH_CP);
520 addargs(&alist, "-r");
522 addargs(&alist, "-p");
523 addargs(&alist, "%s", argv[i]);
524 addargs(&alist, "%s", argv[argc-1]);
525 if (do_local_cmd(&alist))
532 if ((host = strrchr(argv[i], '@')) == NULL) {
539 suser = pwd->pw_name;
541 host = cleanhostname(host);
542 len = strlen(src) + CMDNEEDS + 20;
544 (void) snprintf(bp, len, "%s -f %s", cmd, src);
545 if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
551 sink(1, argv + argc - 1);
558 source(int argc, char **argv)
563 off_t i, amt, statbytes;
565 int fd = -1, haderr, indx;
566 char *last, *name, buf[2048];
569 for (indx = 0; indx < argc; ++indx) {
573 while (len > 1 && name[len-1] == '/')
575 if (strchr(name, '\n') != NULL) {
576 run_err("%s: skipping, filename contains a newline",
580 if ((fd = open(name, O_RDONLY, 0)) < 0)
582 if (fstat(fd, &stb) < 0) {
583 syserr: run_err("%s: %s", name, strerror(errno));
586 switch (stb.st_mode & S_IFMT) {
596 run_err("%s: not a regular file", name);
599 if ((last = strrchr(name, '/')) == NULL)
606 * Make it compatible with possible future
607 * versions expecting microseconds.
609 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
610 (u_long) stb.st_mtime,
611 (u_long) stb.st_atime);
612 (void) atomicio(vwrite, remout, buf, strlen(buf));
616 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
617 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
618 (u_int) (stb.st_mode & FILEMODEMASK),
619 (long long)stb.st_size, last);
621 fprintf(stderr, "Sending file modes: %s", buf);
623 (void) atomicio(vwrite, remout, buf, strlen(buf));
626 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
627 next: if (fd != -1) {
634 start_progress_meter(curfile, stb.st_size, &statbytes);
635 /* Keep writing after an error so that we stay sync'd up. */
636 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
638 if (i + amt > stb.st_size)
639 amt = stb.st_size - i;
641 result = atomicio(read, fd, bp->buf, amt);
646 (void) atomicio(vwrite, remout, bp->buf, amt);
648 result = atomicio(vwrite, remout, bp->buf, amt);
657 stop_progress_meter();
660 if (close(fd) < 0 && !haderr)
665 (void) atomicio(vwrite, remout, "", 1);
667 run_err("%s: %s", name, strerror(haderr));
673 rsource(char *name, struct stat *statp)
677 char *last, *vect[1], path[1100];
679 if (!(dirp = opendir(name))) {
680 run_err("%s: %s", name, strerror(errno));
683 last = strrchr(name, '/');
689 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
690 (u_long) statp->st_mtime,
691 (u_long) statp->st_atime);
692 (void) atomicio(vwrite, remout, path, strlen(path));
693 if (response() < 0) {
698 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
699 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
701 fprintf(stderr, "Entering directory: %s", path);
702 (void) atomicio(vwrite, remout, path, strlen(path));
703 if (response() < 0) {
707 while ((dp = readdir(dirp)) != NULL) {
710 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
712 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
713 run_err("%s/%s: name too long", name, dp->d_name);
716 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
720 (void) closedir(dirp);
721 (void) atomicio(vwrite, remout, "E\n", 2);
728 static struct timeval bwstart, bwend;
729 static int lamt, thresh = 16384;
731 struct timespec ts, rm;
733 if (!timerisset(&bwstart)) {
734 gettimeofday(&bwstart, NULL);
742 gettimeofday(&bwend, NULL);
743 timersub(&bwend, &bwstart, &bwend);
744 if (!timerisset(&bwend))
748 waitlen = (double)1000000L * lamt / limit_rate;
750 bwstart.tv_sec = waitlen / 1000000L;
751 bwstart.tv_usec = waitlen % 1000000L;
753 if (timercmp(&bwstart, &bwend, >)) {
754 timersub(&bwstart, &bwend, &bwend);
756 /* Adjust the wait time */
761 } else if (bwend.tv_usec < 100) {
767 TIMEVAL_TO_TIMESPEC(&bwend, &ts);
768 while (nanosleep(&ts, &rm) == -1) {
776 gettimeofday(&bwstart, NULL);
780 sink(int argc, char **argv)
790 int amt, exists, first, mask, mode, ofd, omode;
791 off_t size, statbytes;
792 int setimes, targisdir, wrerrno = 0;
793 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
794 struct timeval tv[2];
798 #define SCREWUP(str) { why = str; goto screwup; }
800 setimes = targisdir = 0;
805 run_err("ambiguous target");
809 if (targetshouldbedirectory)
812 (void) atomicio(vwrite, remout, "", 1);
813 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
815 for (first = 1;; first = 0) {
817 if (atomicio(read, remin, cp, 1) != 1)
820 SCREWUP("unexpected <newline>");
822 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
823 SCREWUP("lost connection");
825 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
828 fprintf(stderr, "Sink: %s", buf);
830 if (buf[0] == '\01' || buf[0] == '\02') {
832 (void) atomicio(vwrite, STDERR_FILENO,
833 buf + 1, strlen(buf + 1));
840 (void) atomicio(vwrite, remout, "", 1);
850 mtime.tv_sec = strtol(cp, &cp, 10);
851 if (!cp || *cp++ != ' ')
852 SCREWUP("mtime.sec not delimited");
853 mtime.tv_usec = strtol(cp, &cp, 10);
854 if (!cp || *cp++ != ' ')
855 SCREWUP("mtime.usec not delimited");
856 atime.tv_sec = strtol(cp, &cp, 10);
857 if (!cp || *cp++ != ' ')
858 SCREWUP("atime.sec not delimited");
859 atime.tv_usec = strtol(cp, &cp, 10);
860 if (!cp || *cp++ != '\0')
861 SCREWUP("atime.usec not delimited");
862 (void) atomicio(vwrite, remout, "", 1);
865 if (*cp != 'C' && *cp != 'D') {
867 * Check for the case "rcp remote:foo\* local:bar".
868 * In this case, the line "No match." can be returned
869 * by the shell before the rcp command on the remote is
870 * executed so the ^Aerror_message convention isn't
877 SCREWUP("expected control record");
880 for (++cp; cp < buf + 5; cp++) {
881 if (*cp < '0' || *cp > '7')
883 mode = (mode << 3) | (*cp - '0');
886 SCREWUP("mode not delimited");
888 for (size = 0; isdigit(*cp);)
889 size = size * 10 + (*cp++ - '0');
891 SCREWUP("size not delimited");
892 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
893 run_err("error: unexpected filename: %s", cp);
897 static char *namebuf;
898 static size_t cursize;
901 need = strlen(targ) + strlen(cp) + 250;
902 if (need > cursize) {
905 namebuf = xmalloc(need);
908 (void) snprintf(namebuf, need, "%s%s%s", targ,
909 strcmp(targ, "/") ? "/" : "", cp);
914 exists = stat(np, &stb) == 0;
916 int mod_flag = pflag;
918 SCREWUP("received directory without -r");
920 if (!S_ISDIR(stb.st_mode)) {
925 (void) chmod(np, mode);
927 /* Handle copying from a read-only
930 if (mkdir(np, mode | S_IRWXU) < 0)
933 vect[0] = xstrdup(np);
937 if (utimes(vect[0], tv) < 0)
938 run_err("%s: set times: %s",
939 vect[0], strerror(errno));
942 (void) chmod(vect[0], mode);
949 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
950 bad: run_err("%s: %s", np, strerror(errno));
953 (void) atomicio(vwrite, remout, "", 1);
954 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
963 start_progress_meter(curfile, size, &statbytes);
964 for (count = i = 0; i < size; i += 4096) {
970 j = atomicio(read, remin, cp, amt);
972 run_err("%s", j ? strerror(errno) :
973 "dropped connection");
984 if (count == bp->cnt) {
985 /* Keep reading so we stay sync'd up. */
987 if (atomicio(vwrite, ofd, bp->buf,
998 stop_progress_meter();
999 if (count != 0 && wrerr == NO &&
1000 atomicio(vwrite, ofd, bp->buf, count) != count) {
1004 if (wrerr == NO && ftruncate(ofd, size) != 0) {
1005 run_err("%s: truncate: %s", np, strerror(errno));
1009 if (exists || omode != mode)
1011 if (fchmod(ofd, omode)) {
1012 #else /* HAVE_FCHMOD */
1013 if (chmod(np, omode)) {
1014 #endif /* HAVE_FCHMOD */
1015 run_err("%s: set mode: %s",
1016 np, strerror(errno));
1020 if (!exists && omode != mode)
1022 if (fchmod(ofd, omode & ~mask)) {
1023 #else /* HAVE_FCHMOD */
1024 if (chmod(np, omode & ~mask)) {
1025 #endif /* HAVE_FCHMOD */
1026 run_err("%s: set mode: %s",
1027 np, strerror(errno));
1031 if (close(ofd) == -1) {
1036 if (setimes && wrerr == NO) {
1038 if (utimes(np, tv) < 0) {
1039 run_err("%s: set times: %s",
1040 np, strerror(errno));
1046 run_err("%s: %s", np, strerror(wrerrno));
1049 (void) atomicio(vwrite, remout, "", 1);
1056 run_err("protocol error: %s", why);
1063 char ch, *cp, resp, rbuf[2048];
1065 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1075 case 1: /* error, followed by error msg */
1076 case 2: /* fatal error, "" */
1078 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1081 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1084 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1096 (void) fprintf(stderr,
1097 "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1098 " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1099 " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1104 run_err(const char *fmt,...)
1110 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1111 (void) fprintf(fp, "%c", 0x01);
1112 (void) fprintf(fp, "scp: ");
1114 (void) vfprintf(fp, fmt, ap);
1116 (void) fprintf(fp, "\n");
1122 vfprintf(stderr, fmt, ap);
1124 fprintf(stderr, "\n");
1133 if (!stat(cp, &stb)) {
1134 if (S_ISDIR(stb.st_mode))
1138 run_err("%s: %s", cp, strerror(errno));
1153 if (!isalpha(c) && !isdigit(c)) {
1168 bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1173 allocbuf(BUF *bp, int fd, int blksize)
1176 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1179 if (fstat(fd, &stb) < 0) {
1180 run_err("fstat: %s", strerror(errno));
1183 size = roundup(stb.st_blksize, blksize);
1186 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1188 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1189 if (bp->cnt >= size)
1191 if (bp->buf == NULL)
1192 bp->buf = xmalloc(size);
1194 bp->buf = xrealloc(bp->buf, 1, size);
1195 memset(bp->buf, 0, size);
1204 write(STDERR_FILENO, "lost connection\n", 16);