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SFTP: support '*' prefix for quote operations

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prefixing a command with '*' means it is allowed to fail without
aborting the chain actions
This commit is contained in:
Jonas Schnelli
2011-11-18 15:55:09 +01:00
committed by Daniel Stenberg
parent 10ecdf5078
commit f64812ca63
4 changed files with 60 additions and 27 deletions
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80
lib/ssh.c
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@@ -1063,7 +1063,20 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
/*
* Support some of the "FTP" commands
*/
if(curl_strequal("pwd", sshc->quote_item->data)) {
char *cmd = sshc->quote_item->data;
sshc->acceptfail = FALSE;
/* if a command starts with an asterisk, which a legal SFTP command never
can, the command will be allowed to fail without it causing any
aborts or cancels etc. It will cause libcurl to act as if the command
is successful, whatever the server reponds. */
if(cmd[0] == '*') {
cmd++;
sshc->acceptfail = TRUE;
}
if(curl_strequal("pwd", cmd)) {
/* output debug output if that is requested */
char *tmp = aprintf("257 \"%s\" is current directory.\n",
sftp_scp->path);
@@ -1085,12 +1098,12 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
state(conn, SSH_SFTP_NEXT_QUOTE);
break;
}
else if(sshc->quote_item->data) {
else if(cmd) {
/*
* the arguments following the command must be separated from the
* command with a space so we can check for it unconditionally
*/
cp = strchr(sshc->quote_item->data, ' ');
cp = strchr(cmd, ' ');
if(cp == NULL) {
failf(data, "Syntax error in SFTP command. Supply parameter(s)!");
state(conn, SSH_SFTP_CLOSE);
@@ -1121,9 +1134,9 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
* OpenSSH's sftp program and call the appropriate libssh2
* functions.
*/
if(curl_strnequal(sshc->quote_item->data, "chgrp ", 6) ||
curl_strnequal(sshc->quote_item->data, "chmod ", 6) ||
curl_strnequal(sshc->quote_item->data, "chown ", 6) ) {
if(curl_strnequal(cmd, "chgrp ", 6) ||
curl_strnequal(cmd, "chmod ", 6) ||
curl_strnequal(cmd, "chown ", 6) ) {
/* attribute change */
/* sshc->quote_path1 contains the mode to set */
@@ -1146,8 +1159,8 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
state(conn, SSH_SFTP_QUOTE_STAT);
break;
}
else if(curl_strnequal(sshc->quote_item->data, "ln ", 3) ||
curl_strnequal(sshc->quote_item->data, "symlink ", 8)) {
else if(curl_strnequal(cmd, "ln ", 3) ||
curl_strnequal(cmd, "symlink ", 8)) {
/* symbolic linking */
/* sshc->quote_path1 is the source */
/* get the destination */
@@ -1168,12 +1181,12 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
state(conn, SSH_SFTP_QUOTE_SYMLINK);
break;
}
else if(curl_strnequal(sshc->quote_item->data, "mkdir ", 6)) {
else if(curl_strnequal(cmd, "mkdir ", 6)) {
/* create dir */
state(conn, SSH_SFTP_QUOTE_MKDIR);
break;
}
else if(curl_strnequal(sshc->quote_item->data, "rename ", 7)) {
else if(curl_strnequal(cmd, "rename ", 7)) {
/* rename file */
/* first param is the source path */
/* second param is the dest. path */
@@ -1193,12 +1206,12 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
state(conn, SSH_SFTP_QUOTE_RENAME);
break;
}
else if(curl_strnequal(sshc->quote_item->data, "rmdir ", 6)) {
else if(curl_strnequal(cmd, "rmdir ", 6)) {
/* delete dir */
state(conn, SSH_SFTP_QUOTE_RMDIR);
break;
}
else if(curl_strnequal(sshc->quote_item->data, "rm ", 3)) {
else if(curl_strnequal(cmd, "rm ", 3)) {
state(conn, SSH_SFTP_QUOTE_UNLINK);
break;
}
@@ -1246,7 +1259,21 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
case SSH_SFTP_QUOTE_STAT:
if(!curl_strnequal(sshc->quote_item->data, "chmod", 5)) {
{
char *cmd = sshc->quote_item->data;
sshc->acceptfail = FALSE;
/* if a command starts with an asterisk, which a legal SFTP command never
can, the command will be allowed to fail without it causing any
aborts or cancels etc. It will cause libcurl to act as if the command
is successful, whatever the server reponds. */
if(cmd[0] == '*') {
cmd++;
sshc->acceptfail = TRUE;
}
if(!curl_strnequal(cmd, "chmod", 5)) {
/* Since chown and chgrp only set owner OR group but libssh2 wants to
* set them both at once, we need to obtain the current ownership
* first. This takes an extra protocol round trip.
@@ -1258,7 +1285,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(rc == LIBSSH2_ERROR_EAGAIN) {
break;
}
else if(rc != 0) { /* get those attributes */
else if(rc != 0 && !sshc->acceptfail) { /* get those attributes */
err = (int)(libssh2_sftp_last_error(sshc->sftp_session));
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
@@ -1274,10 +1301,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
}
/* Now set the new attributes... */
if(curl_strnequal(sshc->quote_item->data, "chgrp", 5)) {
if(curl_strnequal(cmd, "chgrp", 5)) {
sshc->quote_attrs.gid = strtoul(sshc->quote_path1, NULL, 10);
sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
if(sshc->quote_attrs.gid == 0 && !ISDIGIT(sshc->quote_path1[0])) {
if(sshc->quote_attrs.gid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
!sshc->acceptfail) {
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
Curl_safefree(sshc->quote_path2);
@@ -1289,7 +1317,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
}
else if(curl_strnequal(sshc->quote_item->data, "chmod", 5)) {
else if(curl_strnequal(cmd, "chmod", 5)) {
sshc->quote_attrs.permissions = strtoul(sshc->quote_path1, NULL, 8);
sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_PERMISSIONS;
/* permissions are octal */
@@ -1306,10 +1334,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
}
else if(curl_strnequal(sshc->quote_item->data, "chown", 5)) {
else if(curl_strnequal(cmd, "chown", 5)) {
sshc->quote_attrs.uid = strtoul(sshc->quote_path1, NULL, 10);
sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
if(sshc->quote_attrs.uid == 0 && !ISDIGIT(sshc->quote_path1[0])) {
if(sshc->quote_attrs.uid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
!sshc->acceptfail) {
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
Curl_safefree(sshc->quote_path2);
@@ -1325,6 +1354,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
/* Now send the completed structure... */
state(conn, SSH_SFTP_QUOTE_SETSTAT);
break;
}
case SSH_SFTP_QUOTE_SETSTAT:
rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshc->quote_path2,
@@ -1334,7 +1364,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(rc == LIBSSH2_ERROR_EAGAIN) {
break;
}
else if(rc != 0) {
else if(rc != 0 && !sshc->acceptfail) {
err = (int)(libssh2_sftp_last_error(sshc->sftp_session));
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
@@ -1359,7 +1389,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(rc == LIBSSH2_ERROR_EAGAIN) {
break;
}
else if(rc != 0) {
else if(rc != 0 && !sshc->acceptfail) {
err = (int)(libssh2_sftp_last_error(sshc->sftp_session));
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
@@ -1382,7 +1412,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(rc == LIBSSH2_ERROR_EAGAIN) {
break;
}
else if(rc != 0) {
else if(rc != 0 && !sshc->acceptfail) {
err = (int)(libssh2_sftp_last_error(sshc->sftp_session));
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
@@ -1407,7 +1437,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(rc == LIBSSH2_ERROR_EAGAIN) {
break;
}
else if(rc != 0) {
else if(rc != 0 && !sshc->acceptfail) {
err = (int)(libssh2_sftp_last_error(sshc->sftp_session));
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
@@ -1428,7 +1458,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(rc == LIBSSH2_ERROR_EAGAIN) {
break;
}
else if(rc != 0) {
else if(rc != 0 && !sshc->acceptfail) {
err = (int)(libssh2_sftp_last_error(sshc->sftp_session));
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;
@@ -1447,7 +1477,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(rc == LIBSSH2_ERROR_EAGAIN) {
break;
}
else if(rc != 0) {
else if(rc != 0 && !sshc->acceptfail) {
err = (int)(libssh2_sftp_last_error(sshc->sftp_session));
Curl_safefree(sshc->quote_path1);
sshc->quote_path1 = NULL;