/*
* User defined low-level merge driver support.
*/
static int ll_ext_merge(const struct ll_merge_driver *fn,
mmbuffer_t *result,
const char *path,
mmfile_t *orig, const char *orig_name,
mmfile_t *src1, const char *name1,
mmfile_t *src2, const char *name2,
const struct ll_merge_options *opts,
int marker_size)
{
char temp[4][50];
struct strbuf cmd = STRBUF_INIT;
struct strbuf_expand_dict_entry dict[6];
struct strbuf path_sq = STRBUF_INIT;
const char *args[] = { NULL, NULL };
int status, fd, i;
struct stat st;
assert(opts);
sq_quote_buf(&path_sq, path);
dict[0].placeholder = "O"; dict[0].value = temp[0];
dict[1].placeholder = "A"; dict[1].value = temp[1];
dict[2].placeholder = "B"; dict[2].value = temp[2];
dict[3].placeholder = "L"; dict[3].value = temp[3];
dict[4].placeholder = "P"; dict[4].value = path_sq.buf;
dict[5].placeholder = NULL; dict[5].value = NULL;
if (fn->cmdline == NULL)
die("custom merge driver %s lacks command line.", fn->name);
result->ptr = NULL;
result->size = 0;
create_temp(orig, temp[0], sizeof(temp[0]));
create_temp(src1, temp[1], sizeof(temp[1]));
create_temp(src2, temp[2], sizeof(temp[2]));
xsnprintf(temp[3], sizeof(temp[3]), "%d", marker_size);
strbuf_expand(&cmd, fn->cmdline, strbuf_expand_dict_cb, &dict);
args[0] = cmd.buf;
status = run_command_v_opt(args, RUN_USING_SHELL);
fd = open(temp[1], O_RDONLY);
if (fd < 0)
goto bad;
if (fstat(fd, &st))
goto close_bad;
result->size = st.st_size;
result->ptr = xmallocz(result->size);
if (read_in_full(fd, result->ptr, result->size) != result->size) {
FREE_AND_NULL(result->ptr);
result->size = 0;
}
close_bad:
close(fd);
bad:
for (i = 0; i < 3; i++)
unlink_or_warn(temp[i]);
strbuf_release(&cmd);
strbuf_release(&path_sq);
return status;
}
void sq_quote_argv(struct strbuf *dst, const char **argv)
{
int i;
/* Copy into destination buffer. */
strbuf_grow(dst, 255);
for (i = 0; argv[i]; ++i) {
strbuf_addch(dst, ' ');
sq_quote_buf(dst, argv[i]);
}
}
void sq_quotef(struct strbuf *dst, const char *fmt, ...)
{
struct strbuf src = STRBUF_INIT;
va_list ap;
va_start(ap, fmt);
strbuf_vaddf(&src, fmt, ap);
va_end(ap);
sq_quote_buf(dst, src.buf);
strbuf_release(&src);
}
void git_config_push_parameter(const char *text)
{
struct strbuf env = STRBUF_INIT;
const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
if (old) {
strbuf_addstr(&env, old);
strbuf_addch(&env, ' ');
}
sq_quote_buf(&env, text);
setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
strbuf_release(&env);
}
void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
{
int i;
/* Copy into destination buffer. */
strbuf_grow(dst, 255);
for (i = 0; argv[i]; ++i) {
strbuf_addch(dst, ' ');
sq_quote_buf(dst, argv[i]);
if (maxlen && dst->len > maxlen)
die("Too many or long arguments");
}
}
static int parseopt_dump(const struct option *o, const char *arg, int unset)
{
struct strbuf *parsed = o->value;
if (unset)
strbuf_addf(parsed, " --no-%s", o->long_name);
else if (o->short_name)
strbuf_addf(parsed, " -%c", o->short_name);
else
strbuf_addf(parsed, " --%s", o->long_name);
if (arg) {
strbuf_addch(parsed, ' ');
sq_quote_buf(parsed, arg);
}
return 0;
}
void sq_quote_buf_pretty(struct strbuf *dst, const char *src)
{
static const char ok_punct[] = "+,-./:=@_^";
const char *p;
for (p = src; *p; p++) {
if (!isalpha(*p) && !isdigit(*p) && !strchr(ok_punct, *p)) {
sq_quote_buf(dst, src);
return;
}
}
/* if we get here, we did not need quoting */
strbuf_addstr(dst, src);
}
int sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
{
int i, ret;
/* Copy into destination buffer. */
ret = strbuf_grow(dst, 255);
for (i = 0; !ret && argv[i]; ++i) {
ret = strbuf_addch(dst, ' ');
if (ret)
break;
ret = sq_quote_buf(dst, argv[i]);
if (maxlen && dst->len > maxlen)
return -ENOSPC;
}
return ret;
}
static int sanitize_submodule_config(const char *var, const char *value, void *data)
{
struct strbuf *out = data;
if (submodule_config_ok(var)) {
if (out->len)
strbuf_addch(out, ' ');
if (value)
sq_quotef(out, "%s=%s", var, value);
else
sq_quote_buf(out, var);
}
return 0;
}
/*
* Append a string to a string buffer, with or without shell quoting.
* Return true if the buffer overflowed.
*/
static int add_to_string(char **ptrp, int *sizep, const char *str, int quote)
{
char *p = *ptrp;
int size = *sizep;
int oc;
int err = 0;
if ( quote ) {
oc = sq_quote_buf(p, size, str);
} else {
oc = strlen(str);
memcpy(p, str, (oc >= size) ? size-1 : oc);
}
if ( oc >= size ) {
err = 1;
oc = size-1;
}
*ptrp += oc;
**ptrp = '\0';
*sizep -= oc;
return err;
}
/*
* This returns a dummy child_process if the transport protocol does not
* need fork(2), or a struct child_process object if it does. Once done,
* finish the connection with finish_connect() with the value returned from
* this function (it is safe to call finish_connect() with NULL to support
* the former case).
*
* If it returns, the connect is successful; it just dies on errors (this
* will hopefully be changed in a libification effort, to return NULL when
* the connection failed).
*/
struct child_process *git_connect(int fd[2], const char *url_orig,
const char *prog, int flags)
{
char *url = xstrdup(url_orig);
char *host, *path;
char *end;
int c;
struct child_process *conn;
enum protocol protocol = PROTO_LOCAL;
int free_path = 0;
char *port = NULL;
const char **arg;
struct strbuf cmd;
/* Without this we cannot rely on waitpid() to tell
* what happened to our children.
*/
signal(SIGCHLD, SIG_DFL);
host = strstr(url, "://");
if (host) {
*host = '\0';
protocol = get_protocol(url);
host += 3;
c = '/';
} else {
host = url;
c = ':';
}
/*
* Don't do destructive transforms with git:// as that
* protocol code does '[]' unwrapping of its own.
*/
if (host[0] == '[') {
end = strchr(host + 1, ']');
if (end) {
if (protocol != PROTO_GIT) {
*end = 0;
host++;
}
end++;
} else
end = host;
} else
end = host;
path = strchr(end, c);
if (path && !has_dos_drive_prefix(end)) {
if (c == ':') {
protocol = PROTO_SSH;
*path++ = '\0';
}
} else
path = end;
if (!path || !*path)
die("No path specified. See 'man git-pull' for valid url syntax");
/*
* null-terminate hostname and point path to ~ for URL's like this:
* ssh://host.xz/~user/repo
*/
if (protocol != PROTO_LOCAL && host != url) {
char *ptr = path;
if (path[1] == '~')
path++;
else {
path = xstrdup(ptr);
free_path = 1;
}
*ptr = '\0';
}
/*
* Add support for ssh port: ssh://host.xy:<port>/...
*/
if (protocol == PROTO_SSH && host != url)
port = get_port(host);
if (protocol == PROTO_GIT) {
/* These underlying connection commands die() if they
* cannot connect.
*/
char *target_host = xstrdup(host);
if (git_use_proxy(host))
git_proxy_connect(fd, host);
else
git_tcp_connect(fd, host, flags);
/*
* Separate original protocol components prog and path
* from extended host header with a NUL byte.
*
* Note: Do not add any other headers here! Doing so
* will cause older git-daemon servers to crash.
*/
packet_write(fd[1],
"%s %s%chost=%s%c",
prog, path, 0,
target_host, 0);
free(target_host);
free(url);
if (free_path)
free(path);
return &no_fork;
}
conn = xcalloc(1, sizeof(*conn));
strbuf_init(&cmd, MAX_CMD_LEN);
strbuf_addstr(&cmd, prog);
strbuf_addch(&cmd, ' ');
sq_quote_buf(&cmd, path);
if (cmd.len >= MAX_CMD_LEN)
die("command line too long");
conn->in = conn->out = -1;
conn->argv = arg = xcalloc(7, sizeof(*arg));
if (protocol == PROTO_SSH) {
const char *ssh = getenv("GIT_SSH");
int putty = ssh && strcasestr(ssh, "plink");
if (!ssh) ssh = "ssh";
*arg++ = ssh;
if (putty && !strcasestr(ssh, "tortoiseplink"))
*arg++ = "-batch";
if (port) {
/* P is for PuTTY, p is for OpenSSH */
*arg++ = putty ? "-P" : "-p";
*arg++ = port;
}
*arg++ = host;
}
else {
/* remove these from the environment */
const char *env[] = {
ALTERNATE_DB_ENVIRONMENT,
DB_ENVIRONMENT,
GIT_DIR_ENVIRONMENT,
GIT_WORK_TREE_ENVIRONMENT,
GRAFT_ENVIRONMENT,
INDEX_ENVIRONMENT,
NO_REPLACE_OBJECTS_ENVIRONMENT,
NULL
};
conn->env = env;
conn->use_shell = 1;
}
*arg++ = cmd.buf;
*arg = NULL;
if (start_command(conn))
die("unable to fork");
fd[0] = conn->out; /* read from child's stdout */
fd[1] = conn->in; /* write to child's stdin */
strbuf_release(&cmd);
free(url);
if (free_path)
free(path);
return conn;
}
/*
* This returns a dummy child_process if the transport protocol does not
* need fork(2), or a struct child_process object if it does. Once done,
* finish the connection with finish_connect() with the value returned from
* this function (it is safe to call finish_connect() with NULL to support
* the former case).
*
* If it returns, the connect is successful; it just dies on errors (this
* will hopefully be changed in a libification effort, to return NULL when
* the connection failed).
*/
struct child_process *git_connect(int fd[2], const char *url,
const char *prog, int flags)
{
char *hostandport, *path;
struct child_process *conn = &no_fork;
enum protocol protocol;
struct strbuf cmd = STRBUF_INIT;
/* Without this we cannot rely on waitpid() to tell
* what happened to our children.
*/
signal(SIGCHLD, SIG_DFL);
protocol = parse_connect_url(url, &hostandport, &path);
if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) {
printf("Diag: url=%s\n", url ? url : "NULL");
printf("Diag: protocol=%s\n", prot_name(protocol));
printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL");
printf("Diag: path=%s\n", path ? path : "NULL");
conn = NULL;
} else if (protocol == PROTO_GIT) {
/*
* Set up virtual host information based on where we will
* connect, unless the user has overridden us in
* the environment.
*/
char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST");
if (target_host)
target_host = xstrdup(target_host);
else
target_host = xstrdup(hostandport);
transport_check_allowed("git");
/* These underlying connection commands die() if they
* cannot connect.
*/
if (git_use_proxy(hostandport))
conn = git_proxy_connect(fd, hostandport);
else
git_tcp_connect(fd, hostandport, flags);
/*
* Separate original protocol components prog and path
* from extended host header with a NUL byte.
*
* Note: Do not add any other headers here! Doing so
* will cause older git-daemon servers to crash.
*/
packet_write(fd[1],
"%s %s%chost=%s%c",
prog, path, 0,
target_host, 0);
free(target_host);
} else {
conn = xmalloc(sizeof(*conn));
child_process_init(conn);
strbuf_addstr(&cmd, prog);
strbuf_addch(&cmd, ' ');
sq_quote_buf(&cmd, path);
conn->in = conn->out = -1;
if (protocol == PROTO_SSH) {
const char *ssh;
int putty, tortoiseplink = 0;
char *ssh_host = hostandport;
const char *port = NULL;
transport_check_allowed("ssh");
get_host_and_port(&ssh_host, &port);
if (!port)
port = get_port(ssh_host);
if (flags & CONNECT_DIAG_URL) {
printf("Diag: url=%s\n", url ? url : "NULL");
printf("Diag: protocol=%s\n", prot_name(protocol));
printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL");
printf("Diag: port=%s\n", port ? port : "NONE");
printf("Diag: path=%s\n", path ? path : "NULL");
free(hostandport);
free(path);
free(conn);
return NULL;
}
ssh = getenv("GIT_SSH_COMMAND");
if (ssh) {
conn->use_shell = 1;
putty = 0;
} else {
const char *base;
char *ssh_dup;
ssh = getenv("GIT_SSH");
if (!ssh)
ssh = "ssh";
ssh_dup = xstrdup(ssh);
base = basename(ssh_dup);
tortoiseplink = !strcasecmp(base, "tortoiseplink") ||
!strcasecmp(base, "tortoiseplink.exe");
putty = !strcasecmp(base, "plink") ||
!strcasecmp(base, "plink.exe") || tortoiseplink;
free(ssh_dup);
}
argv_array_push(&conn->args, ssh);
if (tortoiseplink)
argv_array_push(&conn->args, "-batch");
if (port) {
/* P is for PuTTY, p is for OpenSSH */
argv_array_push(&conn->args, putty ? "-P" : "-p");
argv_array_push(&conn->args, port);
}
argv_array_push(&conn->args, ssh_host);
} else {
/* remove repo-local variables from the environment */
conn->env = local_repo_env;
conn->use_shell = 1;
transport_check_allowed("file");
}
argv_array_push(&conn->args, cmd.buf);
if (start_command(conn))
die("unable to fork");
fd[0] = conn->out; /* read from child's stdout */
fd[1] = conn->in; /* write to child's stdin */
strbuf_release(&cmd);
}
free(hostandport);
free(path);
return conn;
}
/*
* This returns the dummy child_process `no_fork` if the transport protocol
* does not need fork(2), or a struct child_process object if it does. Once
* done, finish the connection with finish_connect() with the value returned
* from this function (it is safe to call finish_connect() with NULL to
* support the former case).
*
* If it returns, the connect is successful; it just dies on errors (this
* will hopefully be changed in a libification effort, to return NULL when
* the connection failed).
*/
struct child_process *git_connect(int fd[2], const char *url,
const char *prog, int flags)
{
char *hostandport, *path;
struct child_process *conn;
enum protocol protocol;
/* Without this we cannot rely on waitpid() to tell
* what happened to our children.
*/
signal(SIGCHLD, SIG_DFL);
protocol = parse_connect_url(url, &hostandport, &path);
if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) {
printf("Diag: url=%s\n", url ? url : "NULL");
printf("Diag: protocol=%s\n", prot_name(protocol));
printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL");
printf("Diag: path=%s\n", path ? path : "NULL");
conn = NULL;
} else if (protocol == PROTO_GIT) {
conn = git_connect_git(fd, hostandport, path, prog, flags);
} else {
struct strbuf cmd = STRBUF_INIT;
const char *const *var;
conn = xmalloc(sizeof(*conn));
child_process_init(conn);
if (looks_like_command_line_option(path))
die("strange pathname '%s' blocked", path);
strbuf_addstr(&cmd, prog);
strbuf_addch(&cmd, ' ');
sq_quote_buf(&cmd, path);
/* remove repo-local variables from the environment */
for (var = local_repo_env; *var; var++)
argv_array_push(&conn->env_array, *var);
conn->use_shell = 1;
conn->in = conn->out = -1;
if (protocol == PROTO_SSH) {
char *ssh_host = hostandport;
const char *port = NULL;
transport_check_allowed("ssh");
get_host_and_port(&ssh_host, &port);
if (!port)
port = get_port(ssh_host);
if (flags & CONNECT_DIAG_URL) {
printf("Diag: url=%s\n", url ? url : "NULL");
printf("Diag: protocol=%s\n", prot_name(protocol));
printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL");
printf("Diag: port=%s\n", port ? port : "NONE");
printf("Diag: path=%s\n", path ? path : "NULL");
free(hostandport);
free(path);
free(conn);
strbuf_release(&cmd);
return NULL;
}
fill_ssh_args(conn, ssh_host, port, flags);
} else {
transport_check_allowed("file");
if (get_protocol_version_config() > 0) {
argv_array_pushf(&conn->env_array, GIT_PROTOCOL_ENVIRONMENT "=version=%d",
get_protocol_version_config());
}
}
argv_array_push(&conn->args, cmd.buf);
if (start_command(conn))
die("unable to fork");
fd[0] = conn->out; /* read from child's stdout */
fd[1] = conn->in; /* write to child's stdin */
strbuf_release(&cmd);
}
free(hostandport);
free(path);
return conn;
}
static void create_pack_file(void)
{
struct child_process pack_objects = CHILD_PROCESS_INIT;
char data[8193], progress[128];
char abort_msg[] = "aborting due to possible repository "
"corruption on the remote side.";
int buffered = -1;
ssize_t sz;
int i;
FILE *pipe_fd;
if (!pack_objects_hook)
pack_objects.git_cmd = 1;
else {
argv_array_push(&pack_objects.args, pack_objects_hook);
argv_array_push(&pack_objects.args, "git");
pack_objects.use_shell = 1;
}
if (shallow_nr) {
argv_array_push(&pack_objects.args, "--shallow-file");
argv_array_push(&pack_objects.args, "");
}
argv_array_push(&pack_objects.args, "pack-objects");
argv_array_push(&pack_objects.args, "--revs");
if (use_thin_pack)
argv_array_push(&pack_objects.args, "--thin");
argv_array_push(&pack_objects.args, "--stdout");
if (shallow_nr)
argv_array_push(&pack_objects.args, "--shallow");
if (!no_progress)
argv_array_push(&pack_objects.args, "--progress");
if (use_ofs_delta)
argv_array_push(&pack_objects.args, "--delta-base-offset");
if (use_include_tag)
argv_array_push(&pack_objects.args, "--include-tag");
if (filter_options.filter_spec) {
if (pack_objects.use_shell) {
struct strbuf buf = STRBUF_INIT;
sq_quote_buf(&buf, filter_options.filter_spec);
argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
strbuf_release(&buf);
} else {
argv_array_pushf(&pack_objects.args, "--filter=%s",
filter_options.filter_spec);
}
}
pack_objects.in = -1;
pack_objects.out = -1;
pack_objects.err = -1;
if (start_command(&pack_objects))
die("git upload-pack: unable to fork git-pack-objects");
pipe_fd = xfdopen(pack_objects.in, "w");
if (shallow_nr)
for_each_commit_graft(write_one_shallow, pipe_fd);
for (i = 0; i < want_obj.nr; i++)
fprintf(pipe_fd, "%s\n",
oid_to_hex(&want_obj.objects[i].item->oid));
fprintf(pipe_fd, "--not\n");
for (i = 0; i < have_obj.nr; i++)
fprintf(pipe_fd, "%s\n",
oid_to_hex(&have_obj.objects[i].item->oid));
for (i = 0; i < extra_edge_obj.nr; i++)
fprintf(pipe_fd, "%s\n",
oid_to_hex(&extra_edge_obj.objects[i].item->oid));
fprintf(pipe_fd, "\n");
fflush(pipe_fd);
fclose(pipe_fd);
/* We read from pack_objects.err to capture stderr output for
* progress bar, and pack_objects.out to capture the pack data.
*/
while (1) {
struct pollfd pfd[2];
int pe, pu, pollsize;
int ret;
reset_timeout();
pollsize = 0;
pe = pu = -1;
if (0 <= pack_objects.out) {
pfd[pollsize].fd = pack_objects.out;
pfd[pollsize].events = POLLIN;
pu = pollsize;
pollsize++;
}
if (0 <= pack_objects.err) {
pfd[pollsize].fd = pack_objects.err;
pfd[pollsize].events = POLLIN;
pe = pollsize;
pollsize++;
}
if (!pollsize)
break;
ret = poll(pfd, pollsize,
keepalive < 0 ? -1 : 1000 * keepalive);
if (ret < 0) {
if (errno != EINTR) {
error_errno("poll failed, resuming");
sleep(1);
}
continue;
}
if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
/* Status ready; we ship that in the side-band
* or dump to the standard error.
*/
sz = xread(pack_objects.err, progress,
sizeof(progress));
if (0 < sz)
send_client_data(2, progress, sz);
else if (sz == 0) {
close(pack_objects.err);
pack_objects.err = -1;
}
else
goto fail;
/* give priority to status messages */
continue;
}
if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
/* Data ready; we keep the last byte to ourselves
* in case we detect broken rev-list, so that we
* can leave the stream corrupted. This is
* unfortunate -- unpack-objects would happily
* accept a valid packdata with trailing garbage,
* so appending garbage after we pass all the
* pack data is not good enough to signal
* breakage to downstream.
*/
char *cp = data;
ssize_t outsz = 0;
if (0 <= buffered) {
*cp++ = buffered;
outsz++;
}
sz = xread(pack_objects.out, cp,
sizeof(data) - outsz);
if (0 < sz)
;
else if (sz == 0) {
close(pack_objects.out);
pack_objects.out = -1;
}
else
goto fail;
sz += outsz;
if (1 < sz) {
buffered = data[sz-1] & 0xFF;
sz--;
}
else
buffered = -1;
send_client_data(1, data, sz);
}
/*
* We hit the keepalive timeout without saying anything; send
* an empty message on the data sideband just to let the other
* side know we're still working on it, but don't have any data
* yet.
*
* If we don't have a sideband channel, there's no room in the
* protocol to say anything, so those clients are just out of
* luck.
*/
if (!ret && use_sideband) {
static const char buf[] = "0005\1";
write_or_die(1, buf, 5);
}
}
if (finish_command(&pack_objects)) {
error("git upload-pack: git-pack-objects died with error.");
goto fail;
}
/* flush the data */
if (0 <= buffered) {
data[0] = buffered;
send_client_data(1, data, 1);
fprintf(stderr, "flushed.\n");
}
if (use_sideband)
packet_flush(1);
return;
fail:
send_client_data(3, abort_msg, sizeof(abort_msg));
die("git upload-pack: %s", abort_msg);
}