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openssh/scp.c

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/*
*
* 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>
*
*/
/*
* 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("$Id: scp.c,v 1.22 2000/05/07 02:03:17 damien Exp $");
#include "ssh.h"
#include "xmalloc.h"
#include <utime.h>
#define _PATH_CP "cp"
/* For progressmeter() -- number of seconds before xfer considered "stalled" */
#define STALLTIME 5
/* Visual statistics about files as they are transferred. */
void progressmeter(int);
/* Returns width of the terminal (for progress meter calculations). */
int getttywidth(void);
/* Time a transfer started. */
static struct timeval start;
/* Number of bytes of current file transferred so far. */
volatile unsigned long statbytes;
/* Total size of current file. */
off_t totalbytes = 0;
/* Name of current file being transferred. */
char *curfile;
/* This is set to non-zero if IPv4 is desired. */
int IPv4 = 0;
/* This is set to non-zero if IPv6 is desired. */
int IPv6 = 0;
/* This is set to non-zero to enable verbose mode. */
int verbose_mode = 0;
/* This is set to non-zero if compression is desired. */
int compress_flag = 0;
/* This is set to zero if the progressmeter is not desired. */
int showprogress = 1;
/* This is set to non-zero if running in batch mode (that is, password
and passphrase queries are not allowed). */
int batchmode = 0;
/* This is set to the cipher type string if given on the command line. */
char *cipher = NULL;
/* This is set to the RSA authentication identity file name if given on
the command line. */
char *identity = NULL;
/* This is the port to use in contacting the remote site (is non-NULL). */
char *port = NULL;
/*
* 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 pin[2], pout[2], reserved[2];
if (verbose_mode)
fprintf(stderr, "Executing: host %s, user %s, command %s\n",
host, remuser ? remuser : "(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 (fork() == 0) {
char *args[100];
unsigned int i;
/* Child. */
close(pin[1]);
close(pout[0]);
dup2(pin[0], 0);
dup2(pout[1], 1);
close(pin[0]);
close(pout[1]);
i = 0;
args[i++] = SSH_PROGRAM;
args[i++] = "-x";
args[i++] = "-oFallBackToRsh no";
if (IPv4)
args[i++] = "-4";
if (IPv6)
args[i++] = "-6";
args[i++] = "-oFallBackToRsh no";
if (verbose_mode)
args[i++] = "-v";
if (compress_flag)
args[i++] = "-C";
if (batchmode)
args[i++] = "-oBatchMode yes";
if (cipher != NULL) {
args[i++] = "-c";
args[i++] = cipher;
}
if (identity != NULL) {
args[i++] = "-i";
args[i++] = identity;
}
if (port != NULL) {
args[i++] = "-p";
args[i++] = port;
}
if (remuser != NULL) {
args[i++] = "-l";
args[i++] = remuser;
}
args[i++] = host;
args[i++] = cmd;
args[i++] = NULL;
execvp(SSH_PROGRAM, args);
perror(SSH_PROGRAM);
exit(1);
}
/* Parent. Close the other side, and return the local side. */
close(pin[0]);
*fdout = pin[1];
close(pout[1]);
*fdin = pout[0];
return 0;
}
void
fatal(const char *fmt,...)
{
va_list ap;
char buf[1024];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
fprintf(stderr, "%s\n", buf);
exit(255);
}
/* This stuff used to be in BSD rcp extern.h. */
typedef struct {
int cnt;
char *buf;
} BUF;
extern int iamremote;
BUF *allocbuf(BUF *, int, int);
char *colon(char *);
void lostconn(int);
void nospace(void);
int okname(char *);
void run_err(const char *,...);
void verifydir(char *);
/* Stuff from BSD rcp.c continues. */
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;
char *targ;
extern char *optarg;
extern int optind;
fflag = tflag = 0;
while ((ch = getopt(argc, argv, "dfprtvBCc:i:P:q46")) != EOF)
switch (ch) {
/* User-visible flags. */
case '4':
IPv4 = 1;
break;
case '6':
IPv6 = 1;
break;
case 'p':
pflag = 1;
break;
case 'P':
port = optarg;
break;
case 'r':
iamrecursive = 1;
break;
/* Server options. */
case 'd':
targetshouldbedirectory = 1;
break;
case 'f': /* "from" */
iamremote = 1;
fflag = 1;
break;
case 't': /* "to" */
iamremote = 1;
tflag = 1;
break;
case 'c':
cipher = optarg;
break;
case 'i':
identity = optarg;
break;
case 'v':
verbose_mode = 1;
break;
case 'B':
batchmode = 1;
break;
case 'C':
compress_flag = 1;
break;
case 'q':
showprogress = 0;
break;
case '?':
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;
/* Command to be executed on remote system using "ssh". */
(void) sprintf(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 {
tolocal(argc, argv); /* Dest is local host. */
if (targetshouldbedirectory)
verifydir(argv[argc - 1]);
}
exit(errs != 0);
}
char *
cleanhostname(host)
char *host;
{
if (*host == '[' && host[strlen(host) - 1] == ']') {
host[strlen(host) - 1] = '\0';
return (host + 1);
} else
return host;
}
void
toremote(targ, argc, argv)
char *targ, *argv[];
int argc;
{
int i, len;
char *bp, *host, *src, *suser, *thost, *tuser;
*targ++ = 0;
if (*targ == 0)
targ = ".";
if ((thost = strchr(argv[argc - 1], '@'))) {
/* user@host */
*thost++ = 0;
tuser = argv[argc - 1];
if (*tuser == '\0')
tuser = NULL;
else if (!okname(tuser))
exit(1);
} else {
thost = argv[argc - 1];
tuser = NULL;
}
for (i = 0; i < argc - 1; i++) {
src = colon(argv[i]);
if (src) { /* remote to remote */
*src++ = 0;
if (*src == 0)
src = ".";
host = strchr(argv[i], '@');
len = strlen(SSH_PROGRAM) + strlen(argv[i]) +
strlen(src) + (tuser ? strlen(tuser) : 0) +
strlen(thost) + strlen(targ) + CMDNEEDS + 32;
bp = xmalloc(len);
if (host) {
*host++ = 0;
host = cleanhostname(host);
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
else if (!okname(suser))
continue;
(void) sprintf(bp,
"%s%s -x -o'FallBackToRsh no' -n -l %s %s %s %s '%s%s%s:%s'",
SSH_PROGRAM, verbose_mode ? " -v" : "",
suser, host, cmd, src,
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
} else {
host = cleanhostname(argv[i]);
(void) sprintf(bp,
"exec %s%s -x -o'FallBackToRsh no' -n %s %s %s '%s%s%s:%s'",
SSH_PROGRAM, verbose_mode ? " -v" : "",
host, cmd, src,
tuser ? tuser : "", tuser ? "@" : "",
thost, targ);
}
if (verbose_mode)
fprintf(stderr, "Executing: %s\n", bp);
(void) system(bp);
(void) xfree(bp);
} else { /* local to remote */
if (remin == -1) {
len = strlen(targ) + CMDNEEDS + 20;
bp = xmalloc(len);
(void) sprintf(bp, "%s -t %s", cmd, targ);
host = cleanhostname(thost);
if (do_cmd(host, tuser,
bp, &remin, &remout) < 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;
for (i = 0; i < argc - 1; i++) {
if (!(src = colon(argv[i]))) { /* Local to local. */
len = strlen(_PATH_CP) + strlen(argv[i]) +
strlen(argv[argc - 1]) + 20;
bp = xmalloc(len);
(void) sprintf(bp, "exec %s%s%s %s %s", _PATH_CP,
iamrecursive ? " -r" : "", pflag ? " -p" : "",
argv[i], argv[argc - 1]);
if (verbose_mode)
fprintf(stderr, "Executing: %s\n", bp);
if (system(bp))
++errs;
(void) xfree(bp);
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) sprintf(bp, "%s -f %s", cmd, src);
if (do_cmd(host, suser, bp, &remin, &remout) < 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;
int amt, fd, haderr, indx, result;
char *last, *name, buf[2048];
for (indx = 0; indx < argc; ++indx) {
name = argv[indx];
statbytes = 0;
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) sprintf(buf, "T%lu 0 %lu 0\n",
(unsigned long) stb.st_mtime,
(unsigned long) 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)
(void) sprintf(buf, "C%04o %lu %s\n",
(unsigned int) (stb.st_mode & FILEMODEMASK),
(unsigned long) stb.st_size,
last);
if (verbose_mode) {
fprintf(stderr, "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) sprintf(path, "T%lu 0 %lu 0\n",
(unsigned long) statp->st_mtime,
(unsigned long) statp->st_atime);
(void) atomicio(write, remout, path, strlen(path));
if (response() < 0) {
closedir(dirp);
return;
}
}
(void) sprintf(path, "D%04o %d %.1024s\n",
(unsigned int) (statp->st_mode & FILEMODEMASK),
0, last);
if (verbose_mode)
fprintf(stderr, "Entering directory: %s", path);
(void) atomicio(write, remout, path, strlen(path));
if (response() < 0) {
closedir(dirp);
return;
}
while ((dp = readdir(dirp))) {
if (dp->d_ino == 0)
continue;
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
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) sprintf(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;
int setimes, size, targisdir, wrerrno = 0;
char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
struct utimbuf ut;
int dummy_usec;
#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;
#define getnum(t) (t) = 0; \
while (*cp >= '0' && *cp <= '9') (t) = (t) * 10 + (*cp++ - '0');
cp = buf;
if (*cp == 'T') {
setimes++;
cp++;
getnum(ut.modtime);
if (*cp++ != ' ')
SCREWUP("mtime.sec not delimited");
getnum(dummy_usec);
if (*cp++ != ' ')
SCREWUP("mtime.usec not delimited");
getnum(ut.actime);
if (*cp++ != ' ')
SCREWUP("atime.sec not delimited");
getnum(dummy_usec);
if (*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; *cp >= '0' && *cp <= '9';)
size = size * 10 + (*cp++ - '0');
if (*cp++ != ' ')
SCREWUP("size not delimited");
if (targisdir) {
static char *namebuf;
static int cursize;
size_t need;
need = strlen(targ) + strlen(cp) + 250;
if (need > cursize)
namebuf = xmalloc(need);
(void) sprintf(namebuf, "%s%s%s", targ,
*targ ? "/" : "", cp);
np = namebuf;
} else
np = targ;
curfile = cp;
exists = stat(np, &stb) == 0;
if (buf[0] == 'D') {
int mod_flag = pflag;
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] = np;
sink(1, vect);
if (setimes) {
setimes = 0;
if (utime(np, &ut) < 0)
run_err("%s: set times: %s",
np, strerror(errno));
}
if (mod_flag)
(void) chmod(np, mode);
continue;
}
omode = mode;
mode |= S_IWRITE;
if ((ofd = open(np, O_WRONLY | O_CREAT | O_TRUNC, 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;
}
cp = bp->buf;
wrerr = NO;
if (showprogress) {
totalbytes = size;
progressmeter(-1);
}
statbytes = 0;
for (count = i = 0; i < size; i += 4096) {
amt = 4096;
if (i + amt > size)
amt = size - i;
count += amt;
do {
j = atomicio(read, remin, cp, amt);
if (j <= 0) {
run_err("%s", j ? strerror(errno) :
"dropped connection");
exit(1);
}
amt -= j;
cp += j;
statbytes += j;
} while (amt > 0);
if (count == bp->cnt) {
/* 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;
}
}
count = 0;
cp = bp->buf;
}
}
if (showprogress)
progressmeter(1);
if (count != 0 && wrerr == NO &&
(j = atomicio(write, ofd, bp->buf, count)) != count) {
wrerr = YES;
wrerrno = j >= 0 ? EIO : errno;
}
#if 0
if (ftruncate(ofd, size)) {
run_err("%s: truncate: %s", np, strerror(errno));
wrerr = DISPLAYED;
}
#endif
if (pflag) {
if (exists || omode != mode)
if (fchmod(ofd, omode))
run_err("%s: set mode: %s",
np, strerror(errno));
} else {
if (!exists && omode != mode)
if (fchmod(ofd, omode & ~mask))
run_err("%s: set mode: %s",
np, strerror(errno));
}
(void) close(ofd);
(void) response();
if (setimes && wrerr == NO) {
setimes = 0;
if (utime(np, &ut) < 0) {
run_err("%s: set times: %s",
np, strerror(errno));
wrerr = DISPLAYED;
}
}
switch (wrerr) {
case YES:
run_err("%s: %s", np, strerror(wrerrno));
break;
case NO:
(void) atomicio(write, remout, "", 1);
break;
case DISPLAYED:
break;
}
}
screwup:
run_err("protocol error: %s", why);
exit(1);
}
int
response()
{
char ch, *cp, resp, rbuf[2048];
if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp))
lostconn(0);
cp = rbuf;
switch (resp) {
case 0: /* ok */
return (0);
default:
*cp++ = resp;
/* FALLTHROUGH */
case 1: /* error, followed by error msg */
case 2: /* fatal error, "" */
do {
if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
lostconn(0);
*cp++ = ch;
} while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
if (!iamremote)
(void) atomicio(write, STDERR_FILENO, rbuf, cp - rbuf);
++errs;
if (resp == 1)
return (-1);
exit(1);
}
/* NOTREACHED */
}
void
usage()
{
(void) fprintf(stderr,
"usage: scp [-pqrvC46] [-P port] [-c cipher] [-i identity] f1 f2; or:\n scp [options] f1 ... fn directory\n");
exit(1);
}
void
run_err(const char *fmt,...)
{
static FILE *fp;
va_list ap;
++errs;
if (fp == NULL && !(fp = fdopen(remout, "w")))
return;
(void) fprintf(fp, "%c", 0x01);
(void) fprintf(fp, "scp: ");
va_start(ap, fmt);
(void) vfprintf(fp, fmt, ap);
va_end(ap);
(void) fprintf(fp, "\n");
(void) fflush(fp);
if (!iamremote) {
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
}
}
/* Stuff below is from BSD rcp util.c. */
/*-
* Copyright (c) 1992, 1993
* 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.
*
* $Id: scp.c,v 1.22 2000/05/07 02:03:17 damien Exp $
*/
char *
colon(cp)
char *cp;
{
int flag = 0;
if (*cp == ':') /* Leading colon is part of file name. */
return (0);
if (*cp == '[')
flag = 1;
for (; *cp; ++cp) {
if (*cp == '@' && *(cp+1) == '[')
flag = 1;
if (*cp == ']' && *(cp+1) == ':' && flag)
return (cp+1);
if (*cp == ':' && !flag)
return (cp);
if (*cp == '/')
return (0);
}
return (0);
}
void
verifydir(cp)
char *cp;
{
struct stat stb;
if (!stat(cp, &stb)) {
if (S_ISDIR(stb.st_mode))
return;
errno = ENOTDIR;
}
run_err("%s: %s", cp, strerror(errno));
exit(1);
}
int
okname(cp0)
char *cp0;
{
int c;
char *cp;
cp = cp0;
do {
c = *cp;
if (c & 0200)
goto bad;
if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
goto bad;
} while (*++cp);
return (1);
bad: fprintf(stderr, "%s: invalid user name\n", cp0);
return (0);
}
BUF *
allocbuf(bp, fd, blksize)
BUF *bp;
int fd, blksize;
{
size_t size;
struct stat stb;
if (fstat(fd, &stb) < 0) {
run_err("fstat: %s", strerror(errno));
return (0);
}
if (stb.st_blksize == 0)
size = blksize;
else
size = blksize + (stb.st_blksize - blksize % stb.st_blksize) %
stb.st_blksize;
if (bp->cnt >= size)
return (bp);
if (bp->buf == NULL)
bp->buf = xmalloc(size);
else
bp->buf = xrealloc(bp->buf, size);
bp->cnt = size;
return (bp);
}
void
lostconn(signo)
int signo;
{
if (!iamremote)
fprintf(stderr, "lost connection\n");
exit(1);
}
void
alarmtimer(int wait)
{
struct itimerval itv;
itv.it_value.tv_sec = wait;
itv.it_value.tv_usec = 0;
itv.it_interval = itv.it_value;
setitimer(ITIMER_REAL, &itv, NULL);
}
void
updateprogressmeter(int ignore)
{
int save_errno = errno;
progressmeter(0);
errno = save_errno;
}
int
foregroundproc()
{
static pid_t pgrp = -1;
int ctty_pgrp;
if (pgrp == -1)
pgrp = getpgrp();
return ((ioctl(STDOUT_FILENO, TIOCGPGRP, &ctty_pgrp) != -1 &&
ctty_pgrp == pgrp));
}
void
progressmeter(int flag)
{
static const char prefixes[] = " KMGTP";
static struct timeval lastupdate;
static off_t lastsize;
struct timeval now, td, wait;
off_t cursize, abbrevsize;
double elapsed;
int ratio, barlength, i, remaining;
char buf[256];
if (flag == -1) {
(void) gettimeofday(&start, (struct timezone *) 0);
lastupdate = start;
lastsize = 0;
}
if (foregroundproc() == 0)
return;
(void) gettimeofday(&now, (struct timezone *) 0);
cursize = statbytes;
if (totalbytes != 0) {
ratio = 100.0 * cursize / totalbytes;
ratio = MAX(ratio, 0);
ratio = MIN(ratio, 100);
} else
ratio = 100;
snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
barlength = getttywidth() - 51;
if (barlength > 0) {
i = barlength * ratio / 100;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
"|%.*s%*s|", i,
"*****************************************************************************"
"*****************************************************************************",
barlength - i, "");
}
i = 0;
abbrevsize = cursize;
while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
i++;
abbrevsize >>= 10;
}
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
(int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
'B');
timersub(&now, &lastupdate, &wait);
if (cursize > lastsize) {
lastupdate = now;
lastsize = cursize;
if (wait.tv_sec >= STALLTIME) {
start.tv_sec += wait.tv_sec;
start.tv_usec += wait.tv_usec;
}
wait.tv_sec = 0;
}
timersub(&now, &start, &td);
elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalbytes) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
" --:-- ETA");
} else if (wait.tv_sec >= STALLTIME) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
" - stalled -");
} else {
if (flag != 1)
remaining =
(int)(totalbytes / (statbytes / elapsed) - elapsed);
else
remaining = elapsed;
i = remaining / 3600;
if (i)
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
"%2d:", i);
else
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
" ");
i = remaining % 3600;
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
"%02d:%02d%s", i / 60, i % 60,
(flag != 1) ? " ETA" : " ");
}
atomicio(write, fileno(stdout), buf, strlen(buf));
if (flag == -1) {
struct sigaction sa;
sa.sa_handler = updateprogressmeter;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(SIGALRM, &sa, NULL);
alarmtimer(1);
} else if (flag == 1) {
alarmtimer(0);
atomicio(write, fileno(stdout), "\n", 1);
statbytes = 0;
}
}
int
getttywidth(void)
{
struct winsize winsize;
if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
return (winsize.ws_col ? winsize.ws_col : 80);
else
return (80);
}
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