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scp.c
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scp.c
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/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* scp - secure remote copy. This is basically patched BSD rcp which
* uses ssh to do the data transfer (instead of using rcmd).
*
* NOTE: This version should NOT be suid root. (This uses ssh to
* do the transfer and ssh has the necessary privileges.)
*
* 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
*
* As far as I am concerned, the code I have written for this software
* can be used freely for any purpose. Any derived versions of this
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
*/
/*
* Copyright (c) 1999 Theo de Raadt. All rights reserved.
* Copyright (c) 1999 Aaron Campbell. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Parts from:
*
* Copyright (c) 1983, 1990, 1992, 1993, 1995
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 "includes.h"
RCSID("$OpenBSD: scp.c,v 1.91 2002/06/19 00:27:55 deraadt Exp $");
#include "xmalloc.h"
#include "atomicio.h"
#include "pathnames.h"
#include "log.h"
#include "misc.h"
#ifdef HAVE___PROGNAME
extern char *__progname;
#else
char *__progname;
#endif
/* For progressmeter() -- number of seconds before xfer considered "stalled" */
#define STALLTIME 5
/* alarm() interval for updating progress meter */
#define PROGRESSTIME 1
/* Visual statistics about files as they are transferred. */
void progressmeter(int);
/* Returns width of the terminal (for progress meter calculations). */
int getttywidth(void);
int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout,
int argc);
/* Struct for addargs */
arglist args;
/* Time a transfer started. */
static struct timeval start;
/* Number of bytes of current file transferred so far. */
volatile off_t statbytes;
/* Total size of current file. */
off_t totalbytes = 0;
/* Name of current file being transferred. */
char *curfile;
/* This is set to non-zero to enable verbose mode. */
int verbose_mode = 0;
/* This is set to zero if the progressmeter is not desired. */
int showprogress = 1;
/* This is the program to execute for the secured connection. ("ssh" or -S) */
char *ssh_program = _PATH_SSH_PROGRAM;
/* This is used to store the pid of ssh_program */
static pid_t do_cmd_pid = -1;
static void
killchild(int signo)
{
if (do_cmd_pid > 1) {
kill(do_cmd_pid, signo ? signo : SIGTERM);
waitpid(do_cmd_pid, NULL, 0);
}
if (signo)
_exit(1);
exit(1);
}
/*
* Run a command via fork(2)/exec(2). This can be a local-to-local copy via
* cp(1) or one side of a remote-to-remote copy. We must not use system(3) here
* because we don't want filenames to go through a command expansion in the
* underlying shell. Note that the user can create a filename that is a piece of
* shell code itself and this must not be executed.
*/
static int
do_local_cmd(arglist *a)
{
uint_t i;
int status;
pid_t pid;
if (a->num == 0)
fatal("do_local_cmd: no arguments");
if (verbose_mode) {
fprintf(stderr, gettext("Executing:"));
for (i = 0; i < a->num; i++)
fprintf(stderr, " %s", a->list[i]);
fprintf(stderr, "\n");
}
if ((pid = fork()) == -1)
fatal("do_local_cmd: fork: %s", strerror(errno));
if (pid == 0) {
execvp(a->list[0], a->list);
perror(a->list[0]);
exit(1);
}
do_cmd_pid = pid;
signal(SIGTERM, killchild);
signal(SIGINT, killchild);
signal(SIGHUP, killchild);
while (waitpid(pid, &status, 0) == -1)
if (errno != EINTR)
fatal("do_local_cmd: waitpid: %s", strerror(errno));
do_cmd_pid = -1;
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
return (-1);
return (0);
}
/*
* This function executes the given command as the specified user on the
* given host. This returns < 0 if execution fails, and >= 0 otherwise. This
* assigns the input and output file descriptors on success.
*/
int
do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
{
int pin[2], pout[2], reserved[2];
if (verbose_mode)
fprintf(stderr,
gettext("Executing: program %s host %s, "
"user %s, command %s\n"),
ssh_program, host,
remuser ? remuser : gettext("(unspecified)"), cmd);
/*
* Reserve two descriptors so that the real pipes won't get
* descriptors 0 and 1 because that will screw up dup2 below.
*/
pipe(reserved);
/* Create a socket pair for communicating with ssh. */
if (pipe(pin) < 0)
fatal("pipe: %s", strerror(errno));
if (pipe(pout) < 0)
fatal("pipe: %s", strerror(errno));
/* Free the reserved descriptors. */
close(reserved[0]);
close(reserved[1]);
/* For a child to execute the command on the remote host using ssh. */
if ((do_cmd_pid = fork()) == 0) {
/* Child. */
close(pin[1]);
close(pout[0]);
dup2(pin[0], 0);
dup2(pout[1], 1);
close(pin[0]);
close(pout[1]);
args.list[0] = ssh_program;
if (remuser != NULL)
addargs(&args, "-l%s", remuser);
addargs(&args, "%s", host);
addargs(&args, "%s", cmd);
execvp(ssh_program, args.list);
perror(ssh_program);
exit(1);
} else if (do_cmd_pid == (pid_t)-1) {
/* fork() failed */
fatal("fork: %s", strerror(errno));
}
/* Parent. Close the other side, and return the local side. */
close(pin[0]);
*fdout = pin[1];
close(pout[1]);
*fdin = pout[0];
return (0);
}
typedef struct {
int cnt;
char *buf;
} BUF;
BUF *allocbuf(BUF *, int, int);
void lostconn(int);
void nospace(void);
int okname(char *);
void run_err(const char *, ...);
void verifydir(char *);
struct passwd *pwd;
uid_t userid;
int errs, remin, remout;
int pflag, iamremote, iamrecursive, targetshouldbedirectory;
#define CMDNEEDS 64
char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
int response(void);
void rsource(char *, struct stat *);
void sink(int, char *[]);
void source(int, char *[]);
void tolocal(int, char *[]);
void toremote(char *, int, char *[]);
void usage(void);
int
main(argc, argv)
int argc;
char *argv[];
{
int ch, fflag, tflag, status;
char *targ;
extern char *optarg;
extern int optind;
__progname = get_progname(argv[0]);
g11n_setlocale(LC_ALL, "");
args.list = NULL;
addargs(&args, "ssh"); /* overwritten with ssh_program */
addargs(&args, "-x");
addargs(&args, "-oForwardAgent no");
addargs(&args, "-oClearAllForwardings yes");
fflag = tflag = 0;
while ((ch = getopt(argc, argv, "dfprtvBCc:i:P:q46S:o:F:")) != -1)
switch (ch) {
/* User-visible flags. */
case '4':
case '6':
case 'C':
addargs(&args, "-%c", ch);
break;
case 'o':
case 'c':
case 'i':
case 'F':
addargs(&args, "-%c%s", ch, optarg);
break;
case 'P':
addargs(&args, "-p%s", optarg);
break;
case 'B':
addargs(&args, "-oBatchmode yes");
break;
case 'p':
pflag = 1;
break;
case 'r':
iamrecursive = 1;
break;
case 'S':
ssh_program = xstrdup(optarg);
break;
case 'v':
addargs(&args, "-v");
verbose_mode = 1;
break;
case 'q':
showprogress = 0;
break;
/* Server options. */
case 'd':
targetshouldbedirectory = 1;
break;
case 'f': /* "from" */
iamremote = 1;
fflag = 1;
break;
case 't': /* "to" */
iamremote = 1;
tflag = 1;
#ifdef HAVE_CYGWIN
setmode(0, O_BINARY);
#endif
break;
default:
usage();
}
argc -= optind;
argv += optind;
if ((pwd = getpwuid(userid = getuid())) == NULL)
fatal("unknown user %d", (int)userid);
if (!isatty(STDERR_FILENO))
showprogress = 0;
remin = STDIN_FILENO;
remout = STDOUT_FILENO;
if (fflag) {
/* Follow "protocol", send data. */
(void) response();
source(argc, argv);
exit(errs != 0);
}
if (tflag) {
/* Receive data. */
sink(argc, argv);
exit(errs != 0);
}
if (argc < 2)
usage();
if (argc > 2)
targetshouldbedirectory = 1;
remin = remout = -1;
do_cmd_pid = (pid_t)-1;
/* Command to be executed on remote system using "ssh". */
(void) snprintf(cmd, sizeof (cmd), "scp%s%s%s%s",
verbose_mode ? " -v" : "",
iamrecursive ? " -r" : "", pflag ? " -p" : "",
targetshouldbedirectory ? " -d" : "");
(void) signal(SIGPIPE, lostconn);
if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
toremote(targ, argc, argv);
else {
if (targetshouldbedirectory)
verifydir(argv[argc - 1]);
tolocal(argc, argv); /* Dest is local host. */
}
/*
* Finally check the exit status of the ssh process, if one was forked
* and no error has occurred yet
*/
if (do_cmd_pid != (pid_t)-1 && errs == 0) {
if (remin != -1) {
(void) close(remin);
}
if (remout != -1) {
(void) close(remout);
}
if (waitpid(do_cmd_pid, &status, 0) == -1) {
errs = 1;
} else if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
errs = 1;
}
}
return (errs != 0);
}
void
toremote(targ, argc, argv)
char *targ, *argv[];
int argc;
{
int i, len;
char *bp, *host, *src, *suser, *thost, *tuser, *arg;
arglist alist;
memset(&alist, '\0', sizeof (alist));
alist.list = NULL;
*targ++ = 0;
if (*targ == 0)
targ = ".";
arg = xstrdup(argv[argc - 1]);
if ((thost = strchr(arg, '@'))) {
/* user@host */
*thost++ = 0;
tuser = arg;
if (*tuser == '\0')
tuser = NULL;
else if (!okname(tuser))
exit(1);
} else {
thost = arg;
tuser = NULL;
}
if (tuser != NULL && !okname(tuser)) {
xfree(arg);
return;
}
for (i = 0; i < argc - 1; i++) {
src = colon(argv[i]);
if (src) { /* remote to remote */
freeargs(&alist);
addargs(&alist, "%s", ssh_program);
if (verbose_mode)
addargs(&alist, "-v");
addargs(&alist, "-x");
addargs(&alist, "-oClearAllForwardings yes");
addargs(&alist, "-n");
*src++ = 0;
if (*src == 0)
src = ".";
host = strchr(argv[i], '@');
if (host) {
*host++ = 0;
host = cleanhostname(host);
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
else if (!okname(suser))
continue;
addargs(&alist, "-l");
addargs(&alist, "%s", suser);
} else {
host = cleanhostname(argv[i]);
}
addargs(&alist, "%s", host);
addargs(&alist, "%s", cmd);
addargs(&alist, "%s", src);
addargs(&alist, "%s%s%s:%s",
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
if (do_local_cmd(&alist) != 0)
errs = 1;
} else { /* local to remote */
if (remin == -1) {
len = strlen(targ) + CMDNEEDS + 20;
bp = xmalloc(len);
(void) snprintf(bp, len, "%s -t %s", cmd, targ);
host = cleanhostname(thost);
if (do_cmd(host, tuser, bp, &remin,
&remout, argc) < 0)
exit(1);
if (response() < 0)
exit(1);
(void) xfree(bp);
}
source(1, argv + i);
}
}
}
void
tolocal(argc, argv)
int argc;
char *argv[];
{
int i, len;
char *bp, *host, *src, *suser;
arglist alist;
memset(&alist, '\0', sizeof (alist));
alist.list = NULL;
for (i = 0; i < argc - 1; i++) {
if (!(src = colon(argv[i]))) { /* Local to local. */
freeargs(&alist);
addargs(&alist, "%s", _PATH_CP);
if (iamrecursive)
addargs(&alist, "-r");
if (pflag)
addargs(&alist, "-p");
addargs(&alist, "%s", argv[i]);
addargs(&alist, "%s", argv[argc-1]);
if (do_local_cmd(&alist))
++errs;
continue;
}
*src++ = 0;
if (*src == 0)
src = ".";
if ((host = strchr(argv[i], '@')) == NULL) {
host = argv[i];
suser = NULL;
} else {
*host++ = 0;
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
else if (!okname(suser))
continue;
}
host = cleanhostname(host);
len = strlen(src) + CMDNEEDS + 20;
bp = xmalloc(len);
(void) snprintf(bp, len, "%s -f %s", cmd, src);
if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
(void) xfree(bp);
++errs;
continue;
}
xfree(bp);
sink(1, argv + argc - 1);
(void) close(remin);
remin = remout = -1;
}
}
void
source(argc, argv)
int argc;
char *argv[];
{
struct stat stb;
static BUF buffer;
BUF *bp;
off_t i, amt, result;
int fd, haderr, indx;
char *last, *name, buf[2048];
int len;
for (indx = 0; indx < argc; ++indx) {
name = argv[indx];
statbytes = 0;
len = strlen(name);
while (len > 1 && name[len-1] == '/')
name[--len] = '\0';
if (strchr(name, '\n') != NULL) {
run_err("%s: skipping, filename contains a newline",
name);
goto next;
}
if ((fd = open(name, O_RDONLY, 0)) < 0)
goto syserr;
if (fstat(fd, &stb) < 0) {
syserr: run_err("%s: %s", name, strerror(errno));
goto next;
}
switch (stb.st_mode & S_IFMT) {
case S_IFREG:
break;
case S_IFDIR:
if (iamrecursive) {
rsource(name, &stb);
goto next;
}
/* FALLTHROUGH */
default:
run_err("%s: not a regular file", name);
goto next;
}
if ((last = strrchr(name, '/')) == NULL)
last = name;
else
++last;
curfile = last;
if (pflag) {
/*
* Make it compatible with possible future
* versions expecting microseconds.
*/
(void) snprintf(buf, sizeof (buf), "T%lu 0 %lu 0\n",
(ulong_t)stb.st_mtime,
(ulong_t)stb.st_atime);
(void) atomicio(write, remout, buf, strlen(buf));
if (response() < 0)
goto next;
}
#define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
#ifdef HAVE_LONG_LONG_INT
snprintf(buf, sizeof (buf), "C%04o %lld %s\n",
(uint_t)(stb.st_mode & FILEMODEMASK),
(long long)stb.st_size, last);
#else
/* XXX: Handle integer overflow? */
snprintf(buf, sizeof (buf), "C%04o %lu %s\n",
(uint_t)(stb.st_mode & FILEMODEMASK),
(ulong_t)stb.st_size, last);
#endif
if (verbose_mode) {
fprintf(stderr, gettext("Sending file modes: %s"), buf);
fflush(stderr);
}
(void) atomicio(write, remout, buf, strlen(buf));
if (response() < 0)
goto next;
if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
next: (void) close(fd);
continue;
}
if (showprogress) {
totalbytes = stb.st_size;
progressmeter(-1);
}
/* Keep writing after an error so that we stay sync'd up. */
for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
amt = bp->cnt;
if (i + amt > stb.st_size)
amt = stb.st_size - i;
if (!haderr) {
result = atomicio(read, fd, bp->buf, amt);
if (result != amt)
haderr = result >= 0 ? EIO : errno;
}
if (haderr)
(void) atomicio(write, remout, bp->buf, amt);
else {
result = atomicio(write, remout, bp->buf, amt);
if (result != amt)
haderr = result >= 0 ? EIO : errno;
statbytes += result;
}
}
if (showprogress)
progressmeter(1);
if (close(fd) < 0 && !haderr)
haderr = errno;
if (!haderr)
(void) atomicio(write, remout, "", 1);
else
run_err("%s: %s", name, strerror(haderr));
(void) response();
}
}
void
rsource(name, statp)
char *name;
struct stat *statp;
{
DIR *dirp;
struct dirent *dp;
char *last, *vect[1], path[1100];
if (!(dirp = opendir(name))) {
run_err("%s: %s", name, strerror(errno));
return;
}
last = strrchr(name, '/');
if (last == 0)
last = name;
else
last++;
if (pflag) {
(void) snprintf(path, sizeof (path), "T%lu 0 %lu 0\n",
(ulong_t)statp->st_mtime,
(ulong_t)statp->st_atime);
(void) atomicio(write, remout, path, strlen(path));
if (response() < 0) {
closedir(dirp);
return;
}
}
(void) snprintf(path, sizeof (path), "D%04o %d %.1024s\n",
(uint_t)(statp->st_mode & FILEMODEMASK), 0, last);
if (verbose_mode)
fprintf(stderr, gettext("Entering directory: %s"), path);
(void) atomicio(write, remout, path, strlen(path));
if (response() < 0) {
closedir(dirp);
return;
}
while ((dp = readdir(dirp)) != NULL) {
if (dp->d_ino == 0)
continue;
if ((strcmp(dp->d_name, ".") == 0) ||
(strcmp(dp->d_name, "..") == 0))
continue;
if (strlen(name) + 1 + strlen(dp->d_name) >=
sizeof (path) - 1) {
run_err("%s/%s: name too long", name, dp->d_name);
continue;
}
(void) snprintf(path, sizeof (path), "%s/%s", name, dp->d_name);
vect[0] = path;
source(1, vect);
}
(void) closedir(dirp);
(void) atomicio(write, remout, "E\n", 2);
(void) response();
}
void
sink(argc, argv)
int argc;
char *argv[];
{
static BUF buffer;
struct stat stb;
enum {
YES, NO, DISPLAYED
} wrerr;
BUF *bp;
off_t i, j;
int amt, count, exists, first, mask, mode, ofd, omode;
off_t size;
int setimes, targisdir, wrerrno = 0;
char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
struct timeval tv[2];
#define atime tv[0]
#define mtime tv[1]
#define SCREWUP(str) { why = str; goto screwup; }
setimes = targisdir = 0;
mask = umask(0);
if (!pflag)
(void) umask(mask);
if (argc != 1) {
run_err("ambiguous target");
exit(1);
}
targ = *argv;
if (targetshouldbedirectory)
verifydir(targ);
(void) atomicio(write, remout, "", 1);
if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
targisdir = 1;
for (first = 1; ; first = 0) {
cp = buf;
if (atomicio(read, remin, cp, 1) <= 0)
return;
if (*cp++ == '\n')
SCREWUP("unexpected <newline>")
do {
if (atomicio(read, remin, &ch, sizeof (ch)) !=
sizeof (ch))
SCREWUP("lost connection")
*cp++ = ch;
} while (cp < &buf[sizeof (buf) - 1] && ch != '\n');
*cp = 0;
if (buf[0] == '\01' || buf[0] == '\02') {
if (iamremote == 0)
(void) atomicio(write, STDERR_FILENO,
buf + 1, strlen(buf + 1));
if (buf[0] == '\02')
exit(1);
++errs;
continue;
}
if (buf[0] == 'E') {
(void) atomicio(write, remout, "", 1);
return;
}
if (ch == '\n')
*--cp = 0;
cp = buf;
if (*cp == 'T') {
setimes++;
cp++;
mtime.tv_sec = strtol(cp, &cp, 10);
if (!cp || *cp++ != ' ')
SCREWUP("mtime.sec not delimited")
mtime.tv_usec = strtol(cp, &cp, 10);
if (!cp || *cp++ != ' ')
SCREWUP("mtime.usec not delimited")
atime.tv_sec = strtol(cp, &cp, 10);
if (!cp || *cp++ != ' ')
SCREWUP("atime.sec not delimited")
atime.tv_usec = strtol(cp, &cp, 10);
if (!cp || *cp++ != '\0')
SCREWUP("atime.usec not delimited")
(void) atomicio(write, remout, "", 1);
continue;
}
if (*cp != 'C' && *cp != 'D') {
/*
* Check for the case "rcp remote:foo\* local:bar".
* In this case, the line "No match." can be returned
* by the shell before the rcp command on the remote is
* executed so the ^Aerror_message convention isn't
* followed.
*/
if (first) {
run_err("%s", cp);
exit(1);
}
SCREWUP("expected control record")
}
mode = 0;
for (++cp; cp < buf + 5; cp++) {
if (*cp < '0' || *cp > '7')
SCREWUP("bad mode")
mode = (mode << 3) | (*cp - '0');
}
if (*cp++ != ' ')
SCREWUP("mode not delimited")
for (size = 0; isdigit(*cp); )
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
SCREWUP("size not delimited")
if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
run_err("error: unexpected filename: %s", cp);
exit(1);
}
if (targisdir) {
static char *namebuf;
static int cursize;
size_t need;
need = strlen(targ) + strlen(cp) + 250;
if (need > cursize) {
if (namebuf)
xfree(namebuf);
namebuf = xmalloc(need);
cursize = need;
}
(void) snprintf(namebuf, need, "%s%s%s", targ,
strcmp(targ, "/") ? "/" : "", cp);
np = namebuf;
} else
np = targ;
curfile = cp;
exists = stat(np, &stb) == 0;
if (buf[0] == 'D') {
int mod_flag = pflag;
if (!iamrecursive)
SCREWUP("received directory without -r");
if (exists) {
if (!S_ISDIR(stb.st_mode)) {
errno = ENOTDIR;
goto bad;
}
if (pflag)
(void) chmod(np, mode);
} else {
/*
* Handle copying from a read-only
* directory
*/
mod_flag = 1;
if (mkdir(np, mode | S_IRWXU) < 0)
goto bad;
}
vect[0] = xstrdup(np);
sink(1, vect);
if (setimes) {
setimes = 0;
if (utimes(vect[0], tv) < 0)
run_err("%s: set times: %s",
vect[0], strerror(errno));
}
if (mod_flag)
(void) chmod(vect[0], mode);
if (vect[0])
xfree(vect[0]);
continue;
}
omode = mode;
mode |= S_IWRITE;
if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
bad: run_err("%s: %s", np, strerror(errno));
continue;
}
(void) atomicio(write, remout, "", 1);
if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
(void) close(ofd);
continue;
}
wrerr = NO;
if (showprogress) {
totalbytes = size;
progressmeter(-1);
}
statbytes = 0;
for (i = 0; i < size; i += bp->cnt) {
amt = bp->cnt;
cp = bp->buf;
if (i + amt > size)
amt = size - i;
count = amt;
do {
j = read(remin, cp, amt);
if (j == -1 && (errno == EINTR ||
errno == EAGAIN)) {
continue;
} else if (j <= 0) {
run_err("%s", j ? strerror(errno) :
"dropped connection");
exit(1);
}
amt -= j;
cp += j;
statbytes += j;
} while (amt > 0);
/* Keep reading so we stay sync'd up. */
if (wrerr == NO) {
j = atomicio(write, ofd, bp->buf,
count);
if (j != count) {
wrerr = YES;
wrerrno = j >= 0 ? EIO : errno;
}
}
}
if (showprogress)
progressmeter(1);
if (ftruncate(ofd, size)) {
run_err("%s: truncate: %s", np, strerror(errno));
wrerr = DISPLAYED;
}
if (pflag) {
if (exists || omode != mode)
#ifdef HAVE_FCHMOD
if (fchmod(ofd, omode)) {
#else /* HAVE_FCHMOD */
if (chmod(np, omode)) {
#endif /* HAVE_FCHMOD */
run_err("%s: set mode: %s",
np, strerror(errno));
wrerr = DISPLAYED;
}
} else {
if (!exists && omode != mode)
#ifdef HAVE_FCHMOD
if (fchmod(ofd, omode & ~mask)) {
#else /* HAVE_FCHMOD */
if (chmod(np, omode & ~mask)) {
#endif /* HAVE_FCHMOD */
run_err("%s: set mode: %s",
np, strerror(errno));
wrerr = DISPLAYED;