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upstream: scp: do not spawn ssh with two -s flags for

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remote-to-remote copies

Do not add another "-s" to the argument vector every time an SFTP
connection is initiated.  Instead, introduce a subsystem flag to
do_cmd() and add "-s" when the flag is set.

ok djm@

OpenBSD-Commit-ID: 25df69759f323661d31b2e1e790faa22e27966c1
This commit is contained in:
naddy@openbsd.org 2021-08-11 14:05:19 +00:00 committed by Damien Miller
parent 2a2cd00783
commit 49f46f6d77
1 changed files with 13 additions and 14 deletions
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27
scp.c
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@ -1,4 +1,4 @@
/* $OpenBSD: scp.c,v 1.230 2021/08/10 03:33:34 djm Exp $ */
/* $OpenBSD: scp.c,v 1.231 2021/08/11 14:05:19 naddy Exp $ */
/*
* scp - secure remote copy. This is basically patched BSD rcp which
* uses ssh to do the data transfer (instead of using rcmd).
@ -138,10 +138,8 @@ extern char *__progname;
#define COPY_BUFLEN 16384
int do_cmd(char *program, char *host, char *remuser, int port, char *cmd,
int *fdin, int *fdout, pid_t *pidp);
int do_cmd2(char *host, char *remuser, int port, char *cmd,
int fdin, int fdout);
int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *);
int do_cmd2(char *, char *, int, char *, int, int);
/* Struct for addargs */
arglist args;
@ -270,8 +268,8 @@ do_local_cmd(arglist *a)
*/
int
do_cmd(char *program, char *host, char *remuser, int port, char *cmd,
int *fdin, int *fdout, pid_t *pid)
do_cmd(char *program, char *host, char *remuser, int port, int subsystem,
char *cmd, int *fdin, int *fdout, pid_t *pid)
{
int pin[2], pout[2], reserved[2];
@ -325,6 +323,8 @@ do_cmd(char *program, char *host, char *remuser, int port, char *cmd,
addargs(&args, "-l");
addargs(&args, "%s", remuser);
}
if (subsystem)
addargs(&args, "-s");
addargs(&args, "--");
addargs(&args, "%s", host);
addargs(&args, "%s", cmd);
@ -962,15 +962,14 @@ do_sftp_connect(char *host, char *user, int port, char *sftp_direct,
int *reminp, int *remoutp, int *pidp)
{
if (sftp_direct == NULL) {
addargs(&args, "-s");
if (do_cmd(ssh_program, host, user, port, "sftp",
if (do_cmd(ssh_program, host, user, port, 1, "sftp",
reminp, remoutp, pidp) < 0)
return NULL;
} else {
args.list = NULL;
addargs(&args, "sftp-server");
if (do_cmd(sftp_direct, host, NULL, -1, "sftp",
if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp",
reminp, remoutp, pidp) < 0)
return NULL;
}
@ -1069,7 +1068,7 @@ toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
} else {
xasprintf(&bp, "%s -f %s%s", cmd,
*src == '-' ? "-- " : "", src);
if (do_cmd(ssh_program, host, suser, sport,
if (do_cmd(ssh_program, host, suser, sport, 0,
bp, &remin, &remout, &do_cmd_pid) < 0)
exit(1);
free(bp);
@ -1147,8 +1146,8 @@ toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
if (remin == -1) {
xasprintf(&bp, "%s -t %s%s", cmd,
*targ == '-' ? "-- " : "", targ);
if (do_cmd(ssh_program, thost, tuser, tport, bp,
&remin, &remout, &do_cmd_pid) < 0)
if (do_cmd(ssh_program, thost, tuser, tport, 0,
bp, &remin, &remout, &do_cmd_pid) < 0)
exit(1);
if (response() < 0)
exit(1);
@ -1232,7 +1231,7 @@ tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct)
/* SCP */
xasprintf(&bp, "%s -f %s%s",
cmd, *src == '-' ? "-- " : "", src);
if (do_cmd(ssh_program, host, suser, sport, bp,
if (do_cmd(ssh_program, host, suser, sport, 0, bp,
&remin, &remout, &do_cmd_pid) < 0) {
free(bp);
++errs;