+/* $OpenBSD: scp.c,v 1.165 2009/12/20 07:28:36 guenther Exp $ */
/*
* scp - secure remote copy. This is basically patched BSD rcp which
* uses ssh to do the data transfer (instead of using rcmd).
*/
#include "includes.h"
-RCSID("$OpenBSD: scp.c,v 1.125 2005/07/27 10:39:03 dtucker Exp $");
+
+#include <sys/types.h>
+#include <sys/param.h>
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#else
+# ifdef HAVE_SYS_POLL_H
+# include <sys/poll.h>
+# endif
+#endif
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/wait.h>
+#include <sys/uio.h>
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
+#include <vis.h>
+#endif
#include "xmalloc.h"
#include "atomicio.h"
extern char *__progname;
+#define COPY_BUFLEN 16384
+
+int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout);
+
void bwlimit(int);
/* Struct for addargs */
exit(1);
}
+static int
+do_local_cmd(arglist *a)
+{
+ u_int i;
+ int status;
+ pid_t pid;
+
+ if (a->num == 0)
+ fatal("do_local_cmd: no arguments");
+
+ if (verbose_mode) {
+ fprintf(stderr, "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
*/
int
-do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
+do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
{
int pin[2], pout[2], reserved[2];
* Reserve two descriptors so that the real pipes won't get
* descriptors 0 and 1 because that will screw up dup2 below.
*/
- pipe(reserved);
+ if (pipe(reserved) < 0)
+ fatal("pipe: %s", strerror(errno));
/* Create a socket pair for communicating with ssh. */
if (pipe(pin) < 0)
close(pin[0]);
close(pout[1]);
- args.list[0] = ssh_program;
- if (remuser != NULL)
- addargs(&args, "-l%s", remuser);
+ replacearg(&args, 0, "%s", ssh_program);
+ if (remuser != NULL) {
+ addargs(&args, "-l");
+ addargs(&args, "%s", remuser);
+ }
+ addargs(&args, "--");
addargs(&args, "%s", host);
addargs(&args, "%s", cmd);
BUF *allocbuf(BUF *, int, int);
void lostconn(int);
-void nospace(void);
int okname(char *);
void run_err(const char *,...);
void verifydir(char *);
void source(int, char *[]);
void tolocal(int, char *[]);
void toremote(char *, int, char *[]);
+size_t scpio(ssize_t (*)(int, void *, size_t), int, void *, size_t, off_t *);
void usage(void);
int
main(int argc, char **argv)
{
- int ch, fflag, tflag, status;
+ int ch, fflag, tflag, status, n;
double speed;
- char *targ, *endp;
+ char *targ, *endp, **newargv;
extern char *optarg;
extern int optind;
+ /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
+ sanitise_stdfd();
+
+ /* Copy argv, because we modify it */
+ newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv));
+ for (n = 0; n < argc; n++)
+ newargv[n] = xstrdup(argv[n]);
+ argv = newargv;
+
__progname = ssh_get_progname(argv[0]);
+ memset(&args, '\0', sizeof(args));
args.list = NULL;
- addargs(&args, "ssh"); /* overwritten with ssh_program */
+ addargs(&args, "%s", ssh_program);
addargs(&args, "-x");
addargs(&args, "-oForwardAgent no");
+ addargs(&args, "-oPermitLocalCommand no");
addargs(&args, "-oClearAllForwardings yes");
fflag = tflag = 0;
case 'c':
case 'i':
case 'F':
- addargs(&args, "-%c%s", ch, optarg);
+ addargs(&args, "-%c", ch);
+ addargs(&args, "%s", optarg);
break;
case 'P':
- addargs(&args, "-p%s", optarg);
+ addargs(&args, "-p");
+ addargs(&args, "%s", optarg);
break;
case 'B':
addargs(&args, "-oBatchmode yes");
if ((pwd = getpwuid(userid = getuid())) == NULL)
fatal("unknown user %u", (u_int) userid);
- if (!isatty(STDERR_FILENO))
+ if (!isatty(STDOUT_FILENO))
showprogress = 0;
remin = STDIN_FILENO;
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]);
+ tolocal(argc, argv); /* Dest is local host. */
}
/*
* Finally check the exit status of the ssh process, if one was forked
- * and no error has occured yet
+ * and no error has occurred yet
*/
if (do_cmd_pid != -1 && errs == 0) {
if (remin != -1)
exit(errs != 0);
}
+/*
+ * atomicio-like wrapper that also applies bandwidth limits and updates
+ * the progressmeter counter.
+ */
+size_t
+scpio(ssize_t (*f)(int, void *, size_t), int fd, void *_p, size_t l, off_t *c)
+{
+ u_char *p = (u_char *)_p;
+ size_t offset;
+ ssize_t r;
+ struct pollfd pfd;
+
+ pfd.fd = fd;
+ pfd.events = f == read ? POLLIN : POLLOUT;
+ for (offset = 0; offset < l;) {
+ r = f(fd, p + offset, l - offset);
+ if (r == 0) {
+ errno = EPIPE;
+ return offset;
+ }
+ if (r < 0) {
+ if (errno == EINTR)
+ continue;
+ if (errno == EAGAIN || errno == EWOULDBLOCK) {
+ (void)poll(&pfd, 1, -1); /* Ignore errors */
+ continue;
+ }
+ return offset;
+ }
+ offset += (size_t)r;
+ *c += (off_t)r;
+ if (limit_rate)
+ bwlimit(r);
+ }
+ return offset;
+}
+
void
toremote(char *targ, int argc, char **argv)
{
- int i, len;
char *bp, *host, *src, *suser, *thost, *tuser, *arg;
+ arglist alist;
+ int i;
+
+ memset(&alist, '\0', sizeof(alist));
+ alist.list = NULL;
*targ++ = 0;
if (*targ == 0)
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 */
- static char *ssh_options =
- "-x -o'ClearAllForwardings yes'";
+ 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 = strrchr(argv[i], '@');
- len = strlen(ssh_program) + strlen(argv[i]) +
- strlen(src) + (tuser ? strlen(tuser) : 0) +
- strlen(thost) + strlen(targ) +
- strlen(ssh_options) + CMDNEEDS + 20;
- bp = xmalloc(len);
+
if (host) {
*host++ = 0;
host = cleanhostname(host);
suser = argv[i];
if (*suser == '\0')
suser = pwd->pw_name;
- else if (!okname(suser)) {
- xfree(bp);
+ else if (!okname(suser))
continue;
- }
- if (tuser && !okname(tuser)) {
- xfree(bp);
- continue;
- }
- snprintf(bp, len,
- "%s%s %s -n "
- "-l %s %s %s %s '%s%s%s:%s'",
- ssh_program, verbose_mode ? " -v" : "",
- ssh_options, suser, host, cmd, src,
- tuser ? tuser : "", tuser ? "@" : "",
- thost, targ);
+ addargs(&alist, "-l");
+ addargs(&alist, "%s", suser);
} else {
host = cleanhostname(argv[i]);
- snprintf(bp, len,
- "exec %s%s %s -n %s "
- "%s %s '%s%s%s:%s'",
- ssh_program, verbose_mode ? " -v" : "",
- ssh_options, host, cmd, src,
- tuser ? tuser : "", tuser ? "@" : "",
- thost, targ);
}
- if (verbose_mode)
- fprintf(stderr, "Executing: %s\n", bp);
- if (system(bp) != 0)
+ addargs(&alist, "--");
+ 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;
- (void) xfree(bp);
} else { /* local to remote */
if (remin == -1) {
- len = strlen(targ) + CMDNEEDS + 20;
- bp = xmalloc(len);
- (void) snprintf(bp, len, "%s -t %s", cmd, targ);
+ xasprintf(&bp, "%s -t -- %s", cmd, targ);
host = cleanhostname(thost);
if (do_cmd(host, tuser, bp, &remin,
- &remout, argc) < 0)
+ &remout) < 0)
exit(1);
if (response() < 0)
exit(1);
source(1, argv + i);
}
}
+ xfree(arg);
}
void
tolocal(int argc, char **argv)
{
- int i, len;
char *bp, *host, *src, *suser;
+ arglist alist;
+ int i;
+
+ memset(&alist, '\0', sizeof(alist));
+ alist.list = NULL;
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) snprintf(bp, len, "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))
+ freeargs(&alist);
+ addargs(&alist, "%s", _PATH_CP);
+ if (iamrecursive)
+ addargs(&alist, "-r");
+ if (pflag)
+ addargs(&alist, "-p");
+ addargs(&alist, "--");
+ addargs(&alist, "%s", argv[i]);
+ addargs(&alist, "%s", argv[argc-1]);
+ if (do_local_cmd(&alist))
++errs;
- (void) xfree(bp);
continue;
}
*src++ = 0;
suser = pwd->pw_name;
}
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) {
+ xasprintf(&bp, "%s -f -- %s", cmd, src);
+ if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
(void) xfree(bp);
++errs;
continue;
struct stat stb;
static BUF buffer;
BUF *bp;
- off_t i, amt, statbytes;
- size_t result;
+ off_t i, statbytes;
+ size_t amt;
int fd = -1, haderr, indx;
- char *last, *name, buf[2048];
+ char *last, *name, buf[2048], encname[MAXPATHLEN];
int len;
for (indx = 0; indx < argc; ++indx) {
len = strlen(name);
while (len > 1 && name[len-1] == '/')
name[--len] = '\0';
+ if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0)
+ goto syserr;
if (strchr(name, '\n') != NULL) {
- run_err("%s: skipping, filename contains a newline",
- name);
- goto next;
+ strnvis(encname, name, sizeof(encname), VIS_NL);
+ name = encname;
}
- 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;
}
+ if (stb.st_size < 0) {
+ run_err("%s: %s", name, "Negative file size");
+ goto next;
+ }
+ unset_nonblock(fd);
switch (stb.st_mode & S_IFMT) {
case S_IFREG:
break;
* versions expecting microseconds.
*/
(void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
- (u_long) stb.st_mtime,
- (u_long) stb.st_atime);
+ (u_long) (stb.st_mtime < 0 ? 0 : stb.st_mtime),
+ (u_long) (stb.st_atime < 0 ? 0 : stb.st_atime));
+ if (verbose_mode) {
+ fprintf(stderr, "File mtime %ld atime %ld\n",
+ (long)stb.st_mtime, (long)stb.st_atime);
+ fprintf(stderr, "Sending file timestamps: %s",
+ buf);
+ }
(void) atomicio(vwrite, remout, buf, strlen(buf));
if (response() < 0)
goto next;
#define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
snprintf(buf, sizeof buf, "C%04o %lld %s\n",
(u_int) (stb.st_mode & FILEMODEMASK),
- (int64_t)stb.st_size, last);
+ (long long)stb.st_size, last);
if (verbose_mode) {
fprintf(stderr, "Sending file modes: %s", buf);
}
(void) atomicio(vwrite, remout, buf, strlen(buf));
if (response() < 0)
goto next;
- if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
-next: (void) close(fd);
+ if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
+next: if (fd != -1) {
+ (void) close(fd);
+ fd = -1;
+ }
continue;
}
if (showprogress)
start_progress_meter(curfile, stb.st_size, &statbytes);
- /* Keep writing after an error so that we stay sync'd up. */
+ set_nonblock(remout);
for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
amt = bp->cnt;
- if (i + amt > stb.st_size)
+ if (i + (off_t)amt > stb.st_size)
amt = stb.st_size - i;
if (!haderr) {
- result = atomicio(read, fd, bp->buf, amt);
- if (result != amt)
+ if (atomicio(read, fd, bp->buf, amt) != amt)
haderr = errno;
}
- if (haderr)
- (void) atomicio(vwrite, remout, bp->buf, amt);
- else {
- result = atomicio(vwrite, remout, bp->buf, amt);
- if (result != amt)
- haderr = errno;
- statbytes += result;
+ /* Keep writing after error to retain sync */
+ if (haderr) {
+ (void)atomicio(vwrite, remout, bp->buf, amt);
+ continue;
}
- if (limit_rate)
- bwlimit(amt);
+ if (scpio(vwrite, remout, bp->buf, amt,
+ &statbytes) != amt)
+ haderr = errno;
}
+ unset_nonblock(remout);
if (showprogress)
stop_progress_meter();
- if (close(fd) < 0 && !haderr)
- haderr = errno;
+ if (fd != -1) {
+ if (close(fd) < 0 && !haderr)
+ haderr = errno;
+ fd = -1;
+ }
if (!haderr)
(void) atomicio(vwrite, remout, "", 1);
else
thresh /= 2;
if (thresh < 2048)
thresh = 2048;
- } else if (bwend.tv_usec < 100) {
+ } else if (bwend.tv_usec < 10000) {
thresh *= 2;
- if (thresh > 32768)
- thresh = 32768;
+ if (thresh > COPY_BUFLEN * 4)
+ thresh = COPY_BUFLEN * 4;
}
TIMEVAL_TO_TIMESPEC(&bwend, &ts);
BUF *bp;
off_t i;
size_t j, count;
- int amt, exists, first, mask, mode, ofd, omode;
+ int amt, exists, first, ofd;
+ mode_t mode, omode, mask;
off_t size, statbytes;
int setimes, targisdir, wrerrno = 0;
char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
continue;
}
(void) atomicio(vwrite, remout, "", 1);
- if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
+ if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
(void) close(ofd);
continue;
}
statbytes = 0;
if (showprogress)
start_progress_meter(curfile, size, &statbytes);
- for (count = i = 0; i < size; i += 4096) {
- amt = 4096;
+ set_nonblock(remin);
+ for (count = i = 0; i < size; i += bp->cnt) {
+ amt = bp->cnt;
if (i + amt > size)
amt = size - i;
count += amt;
do {
- j = atomicio(read, remin, cp, amt);
+ j = scpio(read, remin, cp, amt, &statbytes);
if (j == 0) {
- run_err("%s", j ? strerror(errno) :
+ run_err("%s", j != EPIPE ?
+ strerror(errno) :
"dropped connection");
exit(1);
}
amt -= j;
cp += j;
- statbytes += j;
} while (amt > 0);
- if (limit_rate)
- bwlimit(4096);
-
if (count == bp->cnt) {
/* Keep reading so we stay sync'd up. */
if (wrerr == NO) {
cp = bp->buf;
}
}
+ unset_nonblock(remin);
if (showprogress)
stop_progress_meter();
if (count != 0 && wrerr == NO &&
wrerr = YES;
wrerrno = errno;
}
- if (wrerr == NO && ftruncate(ofd, size) != 0) {
+ if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) &&
+ ftruncate(ofd, size) != 0) {
run_err("%s: truncate: %s", np, strerror(errno));
wrerr = DISPLAYED;
}
(void) fprintf(stderr,
"usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
" [-l limit] [-o ssh_option] [-P port] [-S program]\n"
- " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
+ " [[user@]host1:]file1 ... [[user@]host2:]file2\n");
exit(1);
}
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 (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
+ (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);
if (bp->buf == NULL)
bp->buf = xmalloc(size);
else
- bp->buf = xrealloc(bp->buf, size);
+ bp->buf = xrealloc(bp->buf, 1, size);
memset(bp->buf, 0, size);
bp->cnt = size;
return (bp);
andersk / openssh.git / blobdiff