static void send_request(int fd, struct strbuf *buf)
{
if (args.stateless_rpc) {
send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
packet_flush(fd);
} else
safe_write(fd, buf->buf, buf->len);
}
static void send_request(struct fetch_pack_args *args,
int fd, struct strbuf *buf)
{
if (args->stateless_rpc) {
send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
packet_flush(fd);
} else
write_or_die(fd, buf->buf, buf->len);
}
static void error_clnt(const char *fmt, ...)
{
struct strbuf buf = STRBUF_INIT;
va_list params;
va_start(params, fmt);
strbuf_vaddf(&buf, fmt, params);
va_end(params);
send_sideband(1, 3, buf.buf, buf.len, LARGE_PACKET_MAX);
die("sent error to the client: %s", buf.buf);
}
static ssize_t process_input(int child_fd, int band)
{
char buf[16384];
ssize_t sz = read(child_fd, buf, sizeof(buf));
if (sz < 0) {
if (errno != EAGAIN && errno != EINTR)
error_clnt("read error: %s\n", strerror(errno));
return sz;
}
send_sideband(1, band, buf, sz, LARGE_PACKET_MAX);
return sz;
}
static void error_clnt(const char *fmt, ...)
{
char buf[1024];
va_list params;
int len;
va_start(params, fmt);
len = vsprintf(buf, fmt, params);
va_end(params);
send_sideband(1, 3, buf, len, LARGE_PACKET_MAX);
die("sent error to the client: %s", buf);
}
static int copy_to_sideband(int in, int out, void *arg)
{
char data[128];
while (1) {
ssize_t sz = xread(in, data, sizeof(data));
if (sz <= 0)
break;
send_sideband(1, 2, data, sz, use_sideband);
}
close(in);
return 0;
}
static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
{
if (use_sideband)
return send_sideband(1, fd, data, sz, use_sideband);
if (fd == 3)
/* emergency quit */
fd = 2;
if (fd == 2) {
/* XXX: are we happy to lose stuff here? */
xwrite(fd, data, sz);
return sz;
}
return safe_write(fd, data, sz);
}
static void send_client_data(int fd, const char *data, ssize_t sz)
{
if (use_sideband) {
send_sideband(1, fd, data, sz, use_sideband);
return;
}
if (fd == 3)
/* emergency quit */
fd = 2;
if (fd == 2) {
/* XXX: are we happy to lose stuff here? */
xwrite(fd, data, sz);
return;
}
write_or_die(fd, data, sz);
}
static void report_message(const char *prefix, const char *err, va_list params)
{
int sz = strlen(prefix);
char msg[4096];
strncpy(msg, prefix, sz);
sz += vsnprintf(msg + sz, sizeof(msg) - sz, err, params);
if (sz > (sizeof(msg) - 1))
sz = sizeof(msg) - 1;
msg[sz++] = '\n';
if (use_sideband)
send_sideband(1, 2, msg, sz, use_sideband);
else
xwrite(2, msg, sz);
}
static void report(struct command *commands, const char *unpack_status)
{
struct command *cmd;
struct strbuf buf = STRBUF_INIT;
packet_buf_write(&buf, "unpack %s\n",
unpack_status ? unpack_status : "ok");
for (cmd = commands; cmd; cmd = cmd->next) {
if (!cmd->error_string)
packet_buf_write(&buf, "ok %s\n",
cmd->ref_name);
else
packet_buf_write(&buf, "ng %s %s\n",
cmd->ref_name, cmd->error_string);
}
packet_buf_flush(&buf);
if (use_sideband)
send_sideband(1, 1, buf.buf, buf.len, use_sideband);
else
safe_write(1, buf.buf, buf.len);
strbuf_release(&buf);
}
/*
* Make a pack stream and spit it out into file descriptor fd
*/
static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args)
{
/*
* The child becomes pack-objects --revs; we feed
* the revision parameters to it via its stdin and
* let its stdout go back to the other end.
*/
const char *argv[] = {
"pack-objects",
"--all-progress-implied",
"--revs",
"--stdout",
NULL,
NULL,
NULL,
NULL,
NULL,
};
struct child_process po;
int i;
i = 4;
if (args->use_thin_pack)
argv[i++] = "--thin";
if (args->use_ofs_delta)
argv[i++] = "--delta-base-offset";
if (args->quiet)
argv[i++] = "-q";
if (args->progress)
argv[i++] = "--progress";
memset(&po, 0, sizeof(po));
po.argv = argv;
po.in = -1;
po.out = args->stateless_rpc ? -1 : fd;
po.git_cmd = 1;
if (start_command(&po))
die_errno("git pack-objects failed");
/*
* We feed the pack-objects we just spawned with revision
* parameters by writing to the pipe.
*/
for (i = 0; i < extra->nr; i++)
if (!feed_object(extra->array[i], po.in, 1))
break;
while (refs) {
if (!is_null_sha1(refs->old_sha1) &&
!feed_object(refs->old_sha1, po.in, 1))
break;
if (!is_null_sha1(refs->new_sha1) &&
!feed_object(refs->new_sha1, po.in, 0))
break;
refs = refs->next;
}
close(po.in);
if (args->stateless_rpc) {
char *buf = xmalloc(LARGE_PACKET_MAX);
while (1) {
ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
if (n <= 0)
break;
send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
}
free(buf);
close(po.out);
po.out = -1;
}
if (finish_command(&po))
return -1;
return 0;
}
int send_pack(struct send_pack_args *args,
int fd[], struct child_process *conn,
struct ref *remote_refs,
struct extra_have_objects *extra_have)
{
int in = fd[0];
int out = fd[1];
struct strbuf req_buf = STRBUF_INIT;
struct ref *ref;
int new_refs;
int allow_deleting_refs = 0;
int status_report = 0;
int use_sideband = 0;
unsigned cmds_sent = 0;
int ret;
struct async demux;
/* Does the other end support the reporting? */
if (server_supports("report-status"))
status_report = 1;
if (server_supports("delete-refs"))
allow_deleting_refs = 1;
if (server_supports("ofs-delta"))
args->use_ofs_delta = 1;
if (server_supports("side-band-64k"))
use_sideband = 1;
if (!remote_refs) {
fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
"Perhaps you should specify a branch such as 'master'.\n");
return 0;
}
/*
* Finally, tell the other end!
*/
new_refs = 0;
for (ref = remote_refs; ref; ref = ref->next) {
if (!ref->peer_ref && !args->send_mirror)
continue;
/* Check for statuses set by set_ref_status_for_push() */
switch (ref->status) {
case REF_STATUS_REJECT_NONFASTFORWARD:
case REF_STATUS_UPTODATE:
continue;
default:
; /* do nothing */
}
if (ref->deletion && !allow_deleting_refs) {
ref->status = REF_STATUS_REJECT_NODELETE;
continue;
}
if (!ref->deletion)
new_refs++;
if (args->dry_run) {
ref->status = REF_STATUS_OK;
} else {
char *old_hex = sha1_to_hex(ref->old_sha1);
char *new_hex = sha1_to_hex(ref->new_sha1);
if (!cmds_sent && (status_report || use_sideband)) {
packet_buf_write(&req_buf, "%s %s %s%c%s%s",
old_hex, new_hex, ref->name, 0,
status_report ? " report-status" : "",
use_sideband ? " side-band-64k" : "");
}
else
packet_buf_write(&req_buf, "%s %s %s",
old_hex, new_hex, ref->name);
ref->status = status_report ?
REF_STATUS_EXPECTING_REPORT :
REF_STATUS_OK;
cmds_sent++;
}
}
if (args->stateless_rpc) {
if (!args->dry_run && cmds_sent) {
packet_buf_flush(&req_buf);
send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
}
} else {
safe_write(out, req_buf.buf, req_buf.len);
packet_flush(out);
}
strbuf_release(&req_buf);
if (use_sideband && cmds_sent) {
memset(&demux, 0, sizeof(demux));
demux.proc = sideband_demux;
demux.data = fd;
demux.out = -1;
if (start_async(&demux))
die("send-pack: unable to fork off sideband demultiplexer");
in = demux.out;
}
if (new_refs && cmds_sent) {
if (pack_objects(out, remote_refs, extra_have, args) < 0) {
for (ref = remote_refs; ref; ref = ref->next)
ref->status = REF_STATUS_NONE;
if (args->stateless_rpc)
close(out);
if (git_connection_is_socket(conn))
shutdown(fd[0], SHUT_WR);
if (use_sideband)
finish_async(&demux);
return -1;
}
}
if (args->stateless_rpc && cmds_sent)
packet_flush(out);
if (status_report && cmds_sent)
ret = receive_status(in, remote_refs);
else
ret = 0;
if (args->stateless_rpc)
packet_flush(out);
if (use_sideband && cmds_sent) {
if (finish_async(&demux)) {
error("error in sideband demultiplexer");
ret = -1;
}
close(demux.out);
}
if (ret < 0)
return ret;
if (args->porcelain)
return 0;
for (ref = remote_refs; ref; ref = ref->next) {
switch (ref->status) {
case REF_STATUS_NONE:
case REF_STATUS_UPTODATE:
case REF_STATUS_OK:
break;
default:
return -1;
}
}
return 0;
}
static int copy_to_sideband(int in, int out, void *arg)
{
char data[128];
int keepalive_active = 0;
if (keepalive_in_sec <= 0)
use_keepalive = KEEPALIVE_NEVER;
if (use_keepalive == KEEPALIVE_ALWAYS)
keepalive_active = 1;
while (1) {
ssize_t sz;
if (keepalive_active) {
struct pollfd pfd;
int ret;
pfd.fd = in;
pfd.events = POLLIN;
ret = poll(&pfd, 1, 1000 * keepalive_in_sec);
if (ret < 0) {
if (errno == EINTR)
continue;
else
break;
} else if (ret == 0) {
/* no data; send a keepalive packet */
static const char buf[] = "0005\1";
write_or_die(1, buf, sizeof(buf) - 1);
continue;
} /* else there is actual data to read */
}
sz = xread(in, data, sizeof(data));
if (sz <= 0)
break;
if (use_keepalive == KEEPALIVE_AFTER_NUL && !keepalive_active) {
const char *p = memchr(data, '\0', sz);
if (p) {
/*
* The NUL tells us to start sending keepalives. Make
* sure we send any other data we read along
* with it.
*/
keepalive_active = 1;
send_sideband(1, 2, data, p - data, use_sideband);
send_sideband(1, 2, p + 1, sz - (p - data + 1), use_sideband);
continue;
}
}
/*
* Either we're not looking for a NUL signal, or we didn't see
* it yet; just pass along the data.
*/
send_sideband(1, 2, data, sz, use_sideband);
}
close(in);
return 0;
}
/*
* Make a pack stream and spit it out into file descriptor fd
*/
static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
{
/*
* The child becomes pack-objects --revs; we feed
* the revision parameters to it via its stdin and
* let its stdout go back to the other end.
*/
const char *argv[] = {
"pack-objects",
"--all-progress-implied",
"--revs",
"--stdout",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
struct child_process po = CHILD_PROCESS_INIT;
FILE *po_in;
int i;
i = 4;
if (args->use_thin_pack)
argv[i++] = "--thin";
if (args->use_ofs_delta)
argv[i++] = "--delta-base-offset";
if (args->quiet || !args->progress)
argv[i++] = "-q";
if (args->progress)
argv[i++] = "--progress";
if (is_repository_shallow())
argv[i++] = "--shallow";
po.argv = argv;
po.in = -1;
po.out = args->stateless_rpc ? -1 : fd;
po.git_cmd = 1;
if (start_command(&po))
die_errno("git pack-objects failed");
/*
* We feed the pack-objects we just spawned with revision
* parameters by writing to the pipe.
*/
po_in = xfdopen(po.in, "w");
for (i = 0; i < extra->nr; i++)
feed_object(extra->sha1[i], po_in, 1);
while (refs) {
if (!is_null_oid(&refs->old_oid))
feed_object(refs->old_oid.hash, po_in, 1);
if (!is_null_oid(&refs->new_oid))
feed_object(refs->new_oid.hash, po_in, 0);
refs = refs->next;
}
fflush(po_in);
if (ferror(po_in))
die_errno("error writing to pack-objects");
fclose(po_in);
if (args->stateless_rpc) {
char *buf = xmalloc(LARGE_PACKET_MAX);
while (1) {
ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
if (n <= 0)
break;
send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
}
free(buf);
close(po.out);
po.out = -1;
}
if (finish_command(&po))
return -1;
return 0;
}
int send_pack(struct send_pack_args *args,
int fd[], struct child_process *conn,
struct ref *remote_refs,
struct sha1_array *extra_have)
{
int in = fd[0];
int out = fd[1];
struct strbuf req_buf = STRBUF_INIT;
struct strbuf cap_buf = STRBUF_INIT;
struct ref *ref;
int need_pack_data = 0;
int allow_deleting_refs = 0;
int status_report = 0;
int use_sideband = 0;
int quiet_supported = 0;
int agent_supported = 0;
int use_atomic = 0;
int atomic_supported = 0;
int use_push_options = 0;
int push_options_supported = 0;
unsigned cmds_sent = 0;
int ret;
struct async demux;
const char *push_cert_nonce = NULL;
git_config(send_pack_config, NULL);
/* Does the other end support the reporting? */
if (server_supports("report-status"))
status_report = 1;
if (server_supports("delete-refs"))
allow_deleting_refs = 1;
if (server_supports("ofs-delta"))
args->use_ofs_delta = 1;
if (config_use_sideband && server_supports("side-band-64k"))
use_sideband = 1;
if (server_supports("quiet"))
quiet_supported = 1;
if (server_supports("agent"))
agent_supported = 1;
if (server_supports("no-thin"))
args->use_thin_pack = 0;
if (server_supports("atomic"))
atomic_supported = 1;
if (server_supports("push-options"))
push_options_supported = 1;
if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) {
int len;
push_cert_nonce = server_feature_value("push-cert", &len);
if (push_cert_nonce) {
reject_invalid_nonce(push_cert_nonce, len);
push_cert_nonce = xmemdupz(push_cert_nonce, len);
} else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) {
die(_("the receiving end does not support --signed push"));
} else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) {
warning(_("not sending a push certificate since the"
" receiving end does not support --signed"
" push"));
}
}
if (!remote_refs) {
fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
"Perhaps you should specify a branch such as 'master'.\n");
return 0;
}
if (args->atomic && !atomic_supported)
die(_("the receiving end does not support --atomic push"));
use_atomic = atomic_supported && args->atomic;
if (args->push_options && !push_options_supported)
die(_("the receiving end does not support push options"));
use_push_options = push_options_supported && args->push_options;
if (status_report)
strbuf_addstr(&cap_buf, " report-status");
if (use_sideband)
strbuf_addstr(&cap_buf, " side-band-64k");
if (quiet_supported && (args->quiet || !args->progress))
strbuf_addstr(&cap_buf, " quiet");
if (use_atomic)
strbuf_addstr(&cap_buf, " atomic");
if (use_push_options)
strbuf_addstr(&cap_buf, " push-options");
if (agent_supported)
strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
/*
* NEEDSWORK: why does delete-refs have to be so specific to
* send-pack machinery that set_ref_status_for_push() cannot
* set this bit for us???
*/
for (ref = remote_refs; ref; ref = ref->next)
if (ref->deletion && !allow_deleting_refs)
ref->status = REF_STATUS_REJECT_NODELETE;
if (!args->dry_run)
advertise_shallow_grafts_buf(&req_buf);
if (!args->dry_run && push_cert_nonce)
cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
cap_buf.buf, push_cert_nonce);
/*
* Clear the status for each ref and see if we need to send
* the pack data.
*/
for (ref = remote_refs; ref; ref = ref->next) {
switch (check_to_send_update(ref, args)) {
case 0: /* no error */
break;
case CHECK_REF_STATUS_REJECTED:
/*
* When we know the server would reject a ref update if
* we were to send it and we're trying to send the refs
* atomically, abort the whole operation.
*/
if (use_atomic)
return atomic_push_failure(args, remote_refs, ref);
/* Fallthrough for non atomic case. */
default:
continue;
}
if (!ref->deletion)
need_pack_data = 1;
if (args->dry_run || !status_report)
ref->status = REF_STATUS_OK;
else
ref->status = REF_STATUS_EXPECTING_REPORT;
}
/*
* Finally, tell the other end!
*/
for (ref = remote_refs; ref; ref = ref->next) {
char *old_hex, *new_hex;
if (args->dry_run || push_cert_nonce)
continue;
if (check_to_send_update(ref, args) < 0)
continue;
old_hex = oid_to_hex(&ref->old_oid);
new_hex = oid_to_hex(&ref->new_oid);
if (!cmds_sent) {
packet_buf_write(&req_buf,
"%s %s %s%c%s",
old_hex, new_hex, ref->name, 0,
cap_buf.buf);
cmds_sent = 1;
} else {
packet_buf_write(&req_buf, "%s %s %s",
old_hex, new_hex, ref->name);
}
}
if (args->stateless_rpc) {
if (!args->dry_run && (cmds_sent || is_repository_shallow())) {
packet_buf_flush(&req_buf);
send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
}
} else {
write_or_die(out, req_buf.buf, req_buf.len);
packet_flush(out);
}
strbuf_release(&req_buf);
strbuf_release(&cap_buf);
if (use_push_options) {
struct string_list_item *item;
struct strbuf sb = STRBUF_INIT;
for_each_string_list_item(item, args->push_options)
packet_buf_write(&sb, "%s", item->string);
write_or_die(out, sb.buf, sb.len);
packet_flush(out);
strbuf_release(&sb);
}
if (use_sideband && cmds_sent) {
memset(&demux, 0, sizeof(demux));
demux.proc = sideband_demux;
demux.data = fd;
demux.out = -1;
demux.isolate_sigpipe = 1;
if (start_async(&demux))
die("send-pack: unable to fork off sideband demultiplexer");
in = demux.out;
}
if (need_pack_data && cmds_sent) {
if (pack_objects(out, remote_refs, extra_have, args) < 0) {
for (ref = remote_refs; ref; ref = ref->next)
ref->status = REF_STATUS_NONE;
if (args->stateless_rpc)
close(out);
if (git_connection_is_socket(conn))
shutdown(fd[0], SHUT_WR);
if (use_sideband) {
close(demux.out);
finish_async(&demux);
}
fd[1] = -1;
return -1;
}
if (!args->stateless_rpc)
/* Closed by pack_objects() via start_command() */
fd[1] = -1;
}
if (args->stateless_rpc && cmds_sent)
packet_flush(out);
if (status_report && cmds_sent)
ret = receive_status(in, remote_refs);
else
ret = 0;
if (args->stateless_rpc)
packet_flush(out);
if (use_sideband && cmds_sent) {
close(demux.out);
if (finish_async(&demux)) {
error("error in sideband demultiplexer");
ret = -1;
}
}
if (ret < 0)
return ret;
if (args->porcelain)
return 0;
for (ref = remote_refs; ref; ref = ref->next) {
switch (ref->status) {
case REF_STATUS_NONE:
case REF_STATUS_UPTODATE:
case REF_STATUS_OK:
break;
default:
return -1;
}
}
return 0;
}
/*
* Make a pack stream and spit it out into file descriptor fd
*/
static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
{
/*
* The child becomes pack-objects --revs; we feed
* the revision parameters to it via its stdin and
* let its stdout go back to the other end.
*/
const char *argv[] = {
"pack-objects",
"--all-progress-implied",
"--revs",
"--stdout",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
struct child_process po = CHILD_PROCESS_INIT;
FILE *po_in;
int i;
int rc;
i = 4;
if (args->use_thin_pack)
argv[i++] = "--thin";
if (args->use_ofs_delta)
argv[i++] = "--delta-base-offset";
if (args->quiet || !args->progress)
argv[i++] = "-q";
if (args->progress)
argv[i++] = "--progress";
if (is_repository_shallow())
argv[i++] = "--shallow";
po.argv = argv;
po.in = -1;
po.out = args->stateless_rpc ? -1 : fd;
po.git_cmd = 1;
if (start_command(&po))
die_errno("git pack-objects failed");
/*
* We feed the pack-objects we just spawned with revision
* parameters by writing to the pipe.
*/
po_in = xfdopen(po.in, "w");
for (i = 0; i < extra->nr; i++)
feed_object(extra->sha1[i], po_in, 1);
while (refs) {
if (!is_null_oid(&refs->old_oid))
feed_object(refs->old_oid.hash, po_in, 1);
if (!is_null_oid(&refs->new_oid))
feed_object(refs->new_oid.hash, po_in, 0);
refs = refs->next;
}
fflush(po_in);
if (ferror(po_in))
die_errno("error writing to pack-objects");
fclose(po_in);
if (args->stateless_rpc) {
char *buf = xmalloc(LARGE_PACKET_MAX);
while (1) {
ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
if (n <= 0)
break;
send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
}
free(buf);
close(po.out);
po.out = -1;
}
rc = finish_command(&po);
if (rc) {
/*
* For a normal non-zero exit, we assume pack-objects wrote
* something useful to stderr. For death by signal, though,
* we should mention it to the user. The exception is SIGPIPE
* (141), because that's a normal occurence if the remote end
* hangs up (and we'll report that by trying to read the unpack
* status).
*/
if (rc > 128 && rc != 141)
error("pack-objects died of signal %d", rc - 128);
return -1;
}
return 0;
}