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libssh2: keep sftp errors as 'unsigned long'
Remove weird work-around for storing the SFTP errors as int instead of
the "unsigned long" that libssh2 actually returns for SFTP errors.

Closes #5534
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bagder committed Jun 8, 2020
1 parent 3186f50 commit 7370b4e39f1390e701f5b68d910c619151daf72b
Showing 1 changed file with 66 additions and 62 deletions.
@@ -93,14 +93,12 @@
#define HAS_STATVFS_SUPPORT 1
#endif

#define sftp_libssh2_last_error(s) curlx_ultosi(libssh2_sftp_last_error(s))

#define sftp_libssh2_realpath(s,p,t,m) \
libssh2_sftp_symlink_ex((s), (p), curlx_uztoui(strlen(p)), \
(t), (m), LIBSSH2_SFTP_REALPATH)
#define sftp_libssh2_realpath(s,p,t,m) \
libssh2_sftp_symlink_ex((s), (p), curlx_uztoui(strlen(p)), \
(t), (m), LIBSSH2_SFTP_REALPATH)

/* Local functions: */
static const char *sftp_libssh2_strerror(int err);
static const char *sftp_libssh2_strerror(unsigned long err);
static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc);
static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc);
static LIBSSH2_FREE_FUNC(my_libssh2_free);
@@ -212,7 +210,7 @@ kbd_callback(const char *name, int name_len, const char *instruction,
(void)abstract;
} /* kbd_callback */

static CURLcode sftp_libssh2_error_to_CURLE(int err)
static CURLcode sftp_libssh2_error_to_CURLE(unsigned long err)
{
switch(err) {
case LIBSSH2_FX_OK:
@@ -795,7 +793,8 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
struct ssh_conn *sshc = &conn->proto.sshc;
curl_socket_t sock = conn->sock[FIRSTSOCKET];
int rc = LIBSSH2_ERROR_NONE;
int err;
int ssherr;
unsigned long sftperr;
int seekerr = CURL_SEEKFUNC_OK;
size_t readdir_len;
*block = 0; /* we're not blocking by default */
@@ -873,12 +872,12 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
state(conn, SSH_AUTH_DONE);
break;
}
err = libssh2_session_last_errno(sshc->ssh_session);
if(err == LIBSSH2_ERROR_EAGAIN)
ssherr = libssh2_session_last_errno(sshc->ssh_session);
if(ssherr == LIBSSH2_ERROR_EAGAIN)
rc = LIBSSH2_ERROR_EAGAIN;
else {
state(conn, SSH_SESSION_FREE);
sshc->actualcode = libssh2_session_error_to_CURLE(err);
sshc->actualcode = libssh2_session_error_to_CURLE(ssherr);
}
break;
}
@@ -1248,16 +1247,16 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
}
else {
/* Return the error type */
err = sftp_libssh2_last_error(sshc->sftp_session);
if(err)
result = sftp_libssh2_error_to_CURLE(err);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
if(sftperr)
result = sftp_libssh2_error_to_CURLE(sftperr);
else
/* in this case, the error wasn't in the SFTP level but for example
a time-out or similar */
result = CURLE_SSH;
sshc->actualcode = result;
DEBUGF(infof(data, "error = %d makes libcurl = %d\n",
err, (int)result));
ssherr, (int)result));

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@gvanem

gvanem Aug 10, 2020

Contributor

From clang-cl, I get:

vssh/libssh2.c(1259,22): warning: variable 'ssherr' may be uninitialized when used here [-Wconditional-uninitialized]
                     ssherr, (int)result));
                     ^~~~~~
./curl_setup_once.h(367,19): note: expanded from macro 'DEBUGF'
#define DEBUGF(x) x
                  ^
vssh/libssh2.c(796,13): note: initialize the variable 'ssherr' to silence this warning
  int ssherr;
            ^
             = 0

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@bagder

bagder Aug 10, 2020

Author Member

Ack, that's supposed to be sftperr there! PR coming up!

state(conn, SSH_STOP);
break;
}
@@ -1532,11 +1531,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) { /* get those attributes */
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
Curl_safefree(sshc->quote_path2);
failf(data, "Attempt to get SFTP stats failed: %s",
sftp_libssh2_strerror(err));
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1603,11 +1602,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) {
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
Curl_safefree(sshc->quote_path2);
failf(data, "Attempt to set SFTP stats failed: %s",
sftp_libssh2_strerror(err));
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1626,11 +1625,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) {
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
Curl_safefree(sshc->quote_path2);
failf(data, "symlink command failed: %s",
sftp_libssh2_strerror(err));
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1647,9 +1646,10 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) {
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
failf(data, "mkdir command failed: %s", sftp_libssh2_strerror(err));
failf(data, "mkdir command failed: %s",
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1671,10 +1671,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) {
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
Curl_safefree(sshc->quote_path2);
failf(data, "rename command failed: %s", sftp_libssh2_strerror(err));
failf(data, "rename command failed: %s",
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1690,9 +1691,10 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) {
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
failf(data, "rmdir command failed: %s", sftp_libssh2_strerror(err));
failf(data, "rmdir command failed: %s",
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1708,9 +1710,9 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) {
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
failf(data, "rm command failed: %s", sftp_libssh2_strerror(err));
failf(data, "rm command failed: %s", sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1731,9 +1733,10 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
if(rc != 0 && !sshc->acceptfail) {
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
Curl_safefree(sshc->quote_path1);
failf(data, "statvfs command failed: %s", sftp_libssh2_strerror(err));
failf(data, "statvfs command failed: %s",
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
sshc->nextstate = SSH_NO_STATE;
sshc->actualcode = CURLE_QUOTE_ERROR;
@@ -1870,21 +1873,21 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
if(LIBSSH2_ERROR_SFTP_PROTOCOL == rc)
/* only when there was an SFTP protocol error can we extract
the sftp error! */
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
else
err = -1; /* not an sftp error at all */
sftperr = LIBSSH2_FX_OK; /* not an sftp error at all */

if(sshc->secondCreateDirs) {
state(conn, SSH_SFTP_CLOSE);
sshc->actualcode = err>= LIBSSH2_FX_OK?
sftp_libssh2_error_to_CURLE(err):CURLE_SSH;
sshc->actualcode = sftperr != LIBSSH2_FX_OK ?
sftp_libssh2_error_to_CURLE(sftperr):CURLE_SSH;
failf(data, "Creating the dir/file failed: %s",
sftp_libssh2_strerror(err));
sftp_libssh2_strerror(sftperr));
break;
}
if(((err == LIBSSH2_FX_NO_SUCH_FILE) ||
(err == LIBSSH2_FX_FAILURE) ||
(err == LIBSSH2_FX_NO_SUCH_PATH)) &&
if(((sftperr == LIBSSH2_FX_NO_SUCH_FILE) ||
(sftperr == LIBSSH2_FX_FAILURE) ||
(sftperr == LIBSSH2_FX_NO_SUCH_PATH)) &&
(data->set.ftp_create_missing_dirs &&
(strlen(sftp_scp->path) > 1))) {
/* try to create the path remotely */
@@ -1894,18 +1897,19 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
state(conn, SSH_SFTP_CLOSE);
sshc->actualcode = err>= LIBSSH2_FX_OK?
sftp_libssh2_error_to_CURLE(err):CURLE_SSH;
sshc->actualcode = sftperr != LIBSSH2_FX_OK ?
sftp_libssh2_error_to_CURLE(sftperr):CURLE_SSH;
if(!sshc->actualcode) {
/* Sometimes, for some reason libssh2_sftp_last_error() returns
zero even though libssh2_sftp_open() failed previously! We need
to work around that! */
/* Sometimes, for some reason libssh2_sftp_last_error() returns zero
even though libssh2_sftp_open() failed previously! We need to
work around that! */
sshc->actualcode = CURLE_SSH;
err = -1;
sftperr = LIBSSH2_FX_OK;
}
failf(data, "Upload failed: %s (%d/%d)",
err>= LIBSSH2_FX_OK?sftp_libssh2_strerror(err):"ssh error",
err, rc);
sftperr != LIBSSH2_FX_OK ?
sftp_libssh2_strerror(sftperr):"ssh error",
sftperr, rc);
break;
}

@@ -2032,11 +2036,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
* permission was denied (creation might succeed further down the
* path) - retry on unspecific FAILURE also
*/
err = sftp_libssh2_last_error(sshc->sftp_session);
if((err != LIBSSH2_FX_FILE_ALREADY_EXISTS) &&
(err != LIBSSH2_FX_FAILURE) &&
(err != LIBSSH2_FX_PERMISSION_DENIED)) {
result = sftp_libssh2_error_to_CURLE(err);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
if((sftperr != LIBSSH2_FX_FILE_ALREADY_EXISTS) &&
(sftperr != LIBSSH2_FX_FAILURE) &&
(sftperr != LIBSSH2_FX_PERMISSION_DENIED)) {
result = sftp_libssh2_error_to_CURLE(sftperr);
state(conn, SSH_SFTP_CLOSE);
sshc->actualcode = result?result:CURLE_SSH;
break;
@@ -2068,11 +2072,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
rc = LIBSSH2_ERROR_EAGAIN;
break;
}
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
failf(data, "Could not open directory for reading: %s",
sftp_libssh2_strerror(err));
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
result = sftp_libssh2_error_to_CURLE(err);
result = sftp_libssh2_error_to_CURLE(sftperr);
sshc->actualcode = result?result:CURLE_SSH;
break;
}
@@ -2159,11 +2163,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
}
else if(rc < 0) {
err = sftp_libssh2_last_error(sshc->sftp_session);
result = sftp_libssh2_error_to_CURLE(err);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
result = sftp_libssh2_error_to_CURLE(sftperr);
sshc->actualcode = result?result:CURLE_SSH;
failf(data, "Could not open remote file for reading: %s :: %d",
sftp_libssh2_strerror(err),
sftp_libssh2_strerror(sftperr),
libssh2_session_last_errno(sshc->ssh_session));
Curl_safefree(sshc->readdir_filename);
Curl_safefree(sshc->readdir_longentry);
@@ -2257,11 +2261,11 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
rc = LIBSSH2_ERROR_EAGAIN;
break;
}
err = sftp_libssh2_last_error(sshc->sftp_session);
sftperr = libssh2_sftp_last_error(sshc->sftp_session);
failf(data, "Could not open remote file for reading: %s",
sftp_libssh2_strerror(err));
sftp_libssh2_strerror(sftperr));
state(conn, SSH_SFTP_CLOSE);
result = sftp_libssh2_error_to_CURLE(err);
result = sftp_libssh2_error_to_CURLE(sftperr);
sshc->actualcode = result?result:CURLE_SSH;
break;
}
@@ -3401,7 +3405,7 @@ static ssize_t sftp_recv(struct connectdata *conn, int sockindex,
return nread;
}

static const char *sftp_libssh2_strerror(int err)
static const char *sftp_libssh2_strerror(unsigned long err)
{
switch(err) {
case LIBSSH2_FX_NO_SUCH_FILE:

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