1 /* $OpenBSD: scp.c,v 1.144 2006/07/09 15:15:10 stevesk 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>
90 #include "pathnames.h"
93 #include "progressmeter.h"
95 extern char *__progname;
97 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
101 /* Struct for addargs */
104 /* Bandwidth limit */
105 off_t limit_rate = 0;
107 /* Name of current file being transferred. */
110 /* This is set to non-zero to enable verbose mode. */
111 int verbose_mode = 0;
113 /* This is set to zero if the progressmeter is not desired. */
114 int showprogress = 1;
116 /* This is the program to execute for the secured connection. ("ssh" or -S) */
117 char *ssh_program = _PATH_SSH_PROGRAM;
119 /* This is used to store the pid of ssh_program */
120 pid_t do_cmd_pid = -1;
125 if (do_cmd_pid > 1) {
126 kill(do_cmd_pid, signo ? signo : SIGTERM);
127 waitpid(do_cmd_pid, NULL, 0);
136 do_local_cmd(arglist *a)
143 fatal("do_local_cmd: no arguments");
146 fprintf(stderr, "Executing:");
147 for (i = 0; i < a->num; i++)
148 fprintf(stderr, " %s", a->list[i]);
149 fprintf(stderr, "\n");
151 if ((pid = fork()) == -1)
152 fatal("do_local_cmd: fork: %s", strerror(errno));
155 execvp(a->list[0], a->list);
161 signal(SIGTERM, killchild);
162 signal(SIGINT, killchild);
163 signal(SIGHUP, killchild);
165 while (waitpid(pid, &status, 0) == -1)
167 fatal("do_local_cmd: waitpid: %s", strerror(errno));
171 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
178 * This function executes the given command as the specified user on the
179 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This
180 * assigns the input and output file descriptors on success.
184 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
186 int pin[2], pout[2], reserved[2];
190 "Executing: program %s host %s, user %s, command %s\n",
192 remuser ? remuser : "(unspecified)", cmd);
195 * Reserve two descriptors so that the real pipes won't get
196 * descriptors 0 and 1 because that will screw up dup2 below.
198 if (pipe(reserved) < 0)
199 fatal("pipe: %s", strerror(errno));
201 /* Create a socket pair for communicating with ssh. */
203 fatal("pipe: %s", strerror(errno));
205 fatal("pipe: %s", strerror(errno));
207 /* Free the reserved descriptors. */
211 /* Fork a child to execute the command on the remote host using ssh. */
213 if (do_cmd_pid == 0) {
222 replacearg(&args, 0, "%s", ssh_program);
224 addargs(&args, "-l%s", remuser);
225 addargs(&args, "%s", host);
226 addargs(&args, "%s", cmd);
228 execvp(ssh_program, args.list);
231 } else if (do_cmd_pid == -1) {
232 fatal("fork: %s", strerror(errno));
234 /* Parent. Close the other side, and return the local side. */
239 signal(SIGTERM, killchild);
240 signal(SIGINT, killchild);
241 signal(SIGHUP, killchild);
250 BUF *allocbuf(BUF *, int, int);
253 void run_err(const char *,...);
254 void verifydir(char *);
258 int errs, remin, remout;
259 int pflag, iamremote, iamrecursive, targetshouldbedirectory;
262 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
265 void rsource(char *, struct stat *);
266 void sink(int, char *[]);
267 void source(int, char *[]);
268 void tolocal(int, char *[]);
269 void toremote(char *, int, char *[]);
273 main(int argc, char **argv)
275 int ch, fflag, tflag, status;
281 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
284 __progname = ssh_get_progname(argv[0]);
286 memset(&args, '\0', sizeof(args));
288 addargs(&args, "%s", ssh_program);
289 addargs(&args, "-x");
290 addargs(&args, "-oForwardAgent no");
291 addargs(&args, "-oPermitLocalCommand no");
292 addargs(&args, "-oClearAllForwardings yes");
295 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
297 /* User-visible flags. */
303 addargs(&args, "-%c", ch);
309 addargs(&args, "-%c%s", ch, optarg);
312 addargs(&args, "-p%s", optarg);
315 addargs(&args, "-oBatchmode yes");
318 speed = strtod(optarg, &endp);
319 if (speed <= 0 || *endp != '\0')
321 limit_rate = speed * 1024;
330 ssh_program = xstrdup(optarg);
333 addargs(&args, "-v");
337 addargs(&args, "-q");
341 /* Server options. */
343 targetshouldbedirectory = 1;
345 case 'f': /* "from" */
353 setmode(0, O_BINARY);
362 if ((pwd = getpwuid(userid = getuid())) == NULL)
363 fatal("unknown user %u", (u_int) userid);
365 if (!isatty(STDERR_FILENO))
368 remin = STDIN_FILENO;
369 remout = STDOUT_FILENO;
372 /* Follow "protocol", send data. */
385 targetshouldbedirectory = 1;
389 /* Command to be executed on remote system using "ssh". */
390 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
391 verbose_mode ? " -v" : "",
392 iamrecursive ? " -r" : "", pflag ? " -p" : "",
393 targetshouldbedirectory ? " -d" : "");
395 (void) signal(SIGPIPE, lostconn);
397 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
398 toremote(targ, argc, argv);
400 if (targetshouldbedirectory)
401 verifydir(argv[argc - 1]);
402 tolocal(argc, argv); /* Dest is local host. */
405 * Finally check the exit status of the ssh process, if one was forked
406 * and no error has occured yet
408 if (do_cmd_pid != -1 && errs == 0) {
412 (void) close(remout);
413 if (waitpid(do_cmd_pid, &status, 0) == -1)
416 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
424 toremote(char *targ, int argc, char **argv)
426 char *bp, *host, *src, *suser, *thost, *tuser, *arg;
430 memset(&alist, '\0', sizeof(alist));
437 arg = xstrdup(argv[argc - 1]);
438 if ((thost = strrchr(arg, '@'))) {
449 if (tuser != NULL && !okname(tuser)) {
454 for (i = 0; i < argc - 1; i++) {
455 src = colon(argv[i]);
456 if (src) { /* remote to remote */
458 addargs(&alist, "%s", ssh_program);
460 addargs(&alist, "-v");
461 addargs(&alist, "-x");
462 addargs(&alist, "-oClearAllForwardings yes");
463 addargs(&alist, "-n");
468 host = strrchr(argv[i], '@');
472 host = cleanhostname(host);
475 suser = pwd->pw_name;
476 else if (!okname(suser))
478 addargs(&alist, "-l");
479 addargs(&alist, "%s", suser);
481 host = cleanhostname(argv[i]);
483 addargs(&alist, "%s", host);
484 addargs(&alist, "%s", cmd);
485 addargs(&alist, "%s", src);
486 addargs(&alist, "%s%s%s:%s",
487 tuser ? tuser : "", tuser ? "@" : "",
489 if (do_local_cmd(&alist) != 0)
491 } else { /* local to remote */
493 xasprintf(&bp, "%s -t %s", cmd, targ);
494 host = cleanhostname(thost);
495 if (do_cmd(host, tuser, bp, &remin,
509 tolocal(int argc, char **argv)
511 char *bp, *host, *src, *suser;
515 memset(&alist, '\0', sizeof(alist));
518 for (i = 0; i < argc - 1; i++) {
519 if (!(src = colon(argv[i]))) { /* Local to local. */
521 addargs(&alist, "%s", _PATH_CP);
523 addargs(&alist, "-r");
525 addargs(&alist, "-p");
526 addargs(&alist, "%s", argv[i]);
527 addargs(&alist, "%s", argv[argc-1]);
528 if (do_local_cmd(&alist))
535 if ((host = strrchr(argv[i], '@')) == NULL) {
542 suser = pwd->pw_name;
544 host = cleanhostname(host);
545 xasprintf(&bp, "%s -f %s", cmd, src);
546 if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
552 sink(1, argv + argc - 1);
559 source(int argc, char **argv)
564 off_t i, amt, statbytes;
566 int fd = -1, haderr, indx;
567 char *last, *name, buf[2048];
570 for (indx = 0; indx < argc; ++indx) {
574 while (len > 1 && name[len-1] == '/')
576 if (strchr(name, '\n') != NULL) {
577 run_err("%s: skipping, filename contains a newline",
581 if ((fd = open(name, O_RDONLY, 0)) < 0)
583 if (fstat(fd, &stb) < 0) {
584 syserr: run_err("%s: %s", name, strerror(errno));
587 switch (stb.st_mode & S_IFMT) {
597 run_err("%s: not a regular file", name);
600 if ((last = strrchr(name, '/')) == NULL)
607 * Make it compatible with possible future
608 * versions expecting microseconds.
610 (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
611 (u_long) stb.st_mtime,
612 (u_long) stb.st_atime);
613 (void) atomicio(vwrite, remout, buf, strlen(buf));
617 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
618 snprintf(buf, sizeof buf, "C%04o %lld %s\n",
619 (u_int) (stb.st_mode & FILEMODEMASK),
620 (long long)stb.st_size, last);
622 fprintf(stderr, "Sending file modes: %s", buf);
624 (void) atomicio(vwrite, remout, buf, strlen(buf));
627 if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
628 next: if (fd != -1) {
635 start_progress_meter(curfile, stb.st_size, &statbytes);
636 /* Keep writing after an error so that we stay sync'd up. */
637 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
639 if (i + amt > stb.st_size)
640 amt = stb.st_size - i;
642 result = atomicio(read, fd, bp->buf, amt);
647 (void) atomicio(vwrite, remout, bp->buf, amt);
649 result = atomicio(vwrite, remout, bp->buf, amt);
658 stop_progress_meter();
661 if (close(fd) < 0 && !haderr)
666 (void) atomicio(vwrite, remout, "", 1);
668 run_err("%s: %s", name, strerror(haderr));
674 rsource(char *name, struct stat *statp)
678 char *last, *vect[1], path[1100];
680 if (!(dirp = opendir(name))) {
681 run_err("%s: %s", name, strerror(errno));
684 last = strrchr(name, '/');
690 (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
691 (u_long) statp->st_mtime,
692 (u_long) statp->st_atime);
693 (void) atomicio(vwrite, remout, path, strlen(path));
694 if (response() < 0) {
699 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
700 (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
702 fprintf(stderr, "Entering directory: %s", path);
703 (void) atomicio(vwrite, remout, path, strlen(path));
704 if (response() < 0) {
708 while ((dp = readdir(dirp)) != NULL) {
711 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
713 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) {
714 run_err("%s/%s: name too long", name, dp->d_name);
717 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
721 (void) closedir(dirp);
722 (void) atomicio(vwrite, remout, "E\n", 2);
729 static struct timeval bwstart, bwend;
730 static int lamt, thresh = 16384;
732 struct timespec ts, rm;
734 if (!timerisset(&bwstart)) {
735 gettimeofday(&bwstart, NULL);
743 gettimeofday(&bwend, NULL);
744 timersub(&bwend, &bwstart, &bwend);
745 if (!timerisset(&bwend))
749 waitlen = (double)1000000L * lamt / limit_rate;
751 bwstart.tv_sec = waitlen / 1000000L;
752 bwstart.tv_usec = waitlen % 1000000L;
754 if (timercmp(&bwstart, &bwend, >)) {
755 timersub(&bwstart, &bwend, &bwend);
757 /* Adjust the wait time */
762 } else if (bwend.tv_usec < 100) {
768 TIMEVAL_TO_TIMESPEC(&bwend, &ts);
769 while (nanosleep(&ts, &rm) == -1) {
777 gettimeofday(&bwstart, NULL);
781 sink(int argc, char **argv)
791 int amt, exists, first, ofd;
792 mode_t mode, omode, mask;
793 off_t size, statbytes;
794 int setimes, targisdir, wrerrno = 0;
795 char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
796 struct timeval tv[2];
800 #define SCREWUP(str) { why = str; goto screwup; }
802 setimes = targisdir = 0;
807 run_err("ambiguous target");
811 if (targetshouldbedirectory)
814 (void) atomicio(vwrite, remout, "", 1);
815 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
817 for (first = 1;; first = 0) {
819 if (atomicio(read, remin, cp, 1) != 1)
822 SCREWUP("unexpected <newline>");
824 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
825 SCREWUP("lost connection");
827 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
830 fprintf(stderr, "Sink: %s", buf);
832 if (buf[0] == '\01' || buf[0] == '\02') {
834 (void) atomicio(vwrite, STDERR_FILENO,
835 buf + 1, strlen(buf + 1));
842 (void) atomicio(vwrite, remout, "", 1);
852 mtime.tv_sec = strtol(cp, &cp, 10);
853 if (!cp || *cp++ != ' ')
854 SCREWUP("mtime.sec not delimited");
855 mtime.tv_usec = strtol(cp, &cp, 10);
856 if (!cp || *cp++ != ' ')
857 SCREWUP("mtime.usec not delimited");
858 atime.tv_sec = strtol(cp, &cp, 10);
859 if (!cp || *cp++ != ' ')
860 SCREWUP("atime.sec not delimited");
861 atime.tv_usec = strtol(cp, &cp, 10);
862 if (!cp || *cp++ != '\0')
863 SCREWUP("atime.usec not delimited");
864 (void) atomicio(vwrite, remout, "", 1);
867 if (*cp != 'C' && *cp != 'D') {
869 * Check for the case "rcp remote:foo\* local:bar".
870 * In this case, the line "No match." can be returned
871 * by the shell before the rcp command on the remote is
872 * executed so the ^Aerror_message convention isn't
879 SCREWUP("expected control record");
882 for (++cp; cp < buf + 5; cp++) {
883 if (*cp < '0' || *cp > '7')
885 mode = (mode << 3) | (*cp - '0');
888 SCREWUP("mode not delimited");
890 for (size = 0; isdigit(*cp);)
891 size = size * 10 + (*cp++ - '0');
893 SCREWUP("size not delimited");
894 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
895 run_err("error: unexpected filename: %s", cp);
899 static char *namebuf;
900 static size_t cursize;
903 need = strlen(targ) + strlen(cp) + 250;
904 if (need > cursize) {
907 namebuf = xmalloc(need);
910 (void) snprintf(namebuf, need, "%s%s%s", targ,
911 strcmp(targ, "/") ? "/" : "", cp);
916 exists = stat(np, &stb) == 0;
918 int mod_flag = pflag;
920 SCREWUP("received directory without -r");
922 if (!S_ISDIR(stb.st_mode)) {
927 (void) chmod(np, mode);
929 /* Handle copying from a read-only
932 if (mkdir(np, mode | S_IRWXU) < 0)
935 vect[0] = xstrdup(np);
939 if (utimes(vect[0], tv) < 0)
940 run_err("%s: set times: %s",
941 vect[0], strerror(errno));
944 (void) chmod(vect[0], mode);
951 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
952 bad: run_err("%s: %s", np, strerror(errno));
955 (void) atomicio(vwrite, remout, "", 1);
956 if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
965 start_progress_meter(curfile, size, &statbytes);
966 for (count = i = 0; i < size; i += 4096) {
972 j = atomicio(read, remin, cp, amt);
974 run_err("%s", j ? strerror(errno) :
975 "dropped connection");
986 if (count == bp->cnt) {
987 /* Keep reading so we stay sync'd up. */
989 if (atomicio(vwrite, ofd, bp->buf,
1000 stop_progress_meter();
1001 if (count != 0 && wrerr == NO &&
1002 atomicio(vwrite, ofd, bp->buf, count) != count) {
1006 if (wrerr == NO && ftruncate(ofd, size) != 0) {
1007 run_err("%s: truncate: %s", np, strerror(errno));
1011 if (exists || omode != mode)
1013 if (fchmod(ofd, omode)) {
1014 #else /* HAVE_FCHMOD */
1015 if (chmod(np, omode)) {
1016 #endif /* HAVE_FCHMOD */
1017 run_err("%s: set mode: %s",
1018 np, strerror(errno));
1022 if (!exists && omode != mode)
1024 if (fchmod(ofd, omode & ~mask)) {
1025 #else /* HAVE_FCHMOD */
1026 if (chmod(np, omode & ~mask)) {
1027 #endif /* HAVE_FCHMOD */
1028 run_err("%s: set mode: %s",
1029 np, strerror(errno));
1033 if (close(ofd) == -1) {
1038 if (setimes && wrerr == NO) {
1040 if (utimes(np, tv) < 0) {
1041 run_err("%s: set times: %s",
1042 np, strerror(errno));
1048 run_err("%s: %s", np, strerror(wrerrno));
1051 (void) atomicio(vwrite, remout, "", 1);
1058 run_err("protocol error: %s", why);
1065 char ch, *cp, resp, rbuf[2048];
1067 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
1077 case 1: /* error, followed by error msg */
1078 case 2: /* fatal error, "" */
1080 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
1083 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
1086 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
1098 (void) fprintf(stderr,
1099 "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
1100 " [-l limit] [-o ssh_option] [-P port] [-S program]\n"
1101 " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
1106 run_err(const char *fmt,...)
1112 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
1113 (void) fprintf(fp, "%c", 0x01);
1114 (void) fprintf(fp, "scp: ");
1116 (void) vfprintf(fp, fmt, ap);
1118 (void) fprintf(fp, "\n");
1124 vfprintf(stderr, fmt, ap);
1126 fprintf(stderr, "\n");
1135 if (!stat(cp, &stb)) {
1136 if (S_ISDIR(stb.st_mode))
1140 run_err("%s: %s", cp, strerror(errno));
1155 if (!isalpha(c) && !isdigit(c)) {
1170 bad: fprintf(stderr, "%s: invalid user name\n", cp0);
1175 allocbuf(BUF *bp, int fd, int blksize)
1178 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
1181 if (fstat(fd, &stb) < 0) {
1182 run_err("fstat: %s", strerror(errno));
1185 size = roundup(stb.st_blksize, blksize);
1188 #else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1190 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
1191 if (bp->cnt >= size)
1193 if (bp->buf == NULL)
1194 bp->buf = xmalloc(size);
1196 bp->buf = xrealloc(bp->buf, 1, size);
1197 memset(bp->buf, 0, size);
1206 write(STDERR_FILENO, "lost connection\n", 16);