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Merge branch 'rs/daemon-interpolate' into maint

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"git daemon" looked up the hostname even when "%CH" and "%IP"
interpolations are not requested, which was unnecessary.

* rs/daemon-interpolate:
  daemon: use callback to build interpolated path
  daemon: look up client-supplied hostname lazily
This commit is contained in:
Junio C Hamano 2015-03-13 22:56:00 -07:00
commit 1469d99068
1 changed files with 71 additions and 14 deletions
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81
daemon.c
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@ -61,6 +61,22 @@ static char *canon_hostname;
static char *ip_address;
static char *tcp_port;
static int hostname_lookup_done;
static void lookup_hostname(void);
static const char *get_canon_hostname(void)
{
lookup_hostname();
return canon_hostname;
}
static const char *get_ip_address(void)
{
lookup_hostname();
return ip_address;
}
static void logreport(int priority, const char *err, va_list params)
{
if (log_syslog) {
@ -106,6 +122,46 @@ static void NORETURN daemon_die(const char *err, va_list params)
exit(1);
}
static void strbuf_addstr_or_null(struct strbuf *sb, const char *s)
{
if (s)
strbuf_addstr(sb, s);
}
struct expand_path_context {
const char *directory;
};
static size_t expand_path(struct strbuf *sb, const char *placeholder, void *ctx)
{
struct expand_path_context *context = ctx;
switch (placeholder[0]) {
case 'H':
strbuf_addstr_or_null(sb, hostname);
return 1;
case 'C':
if (placeholder[1] == 'H') {
strbuf_addstr_or_null(sb, get_canon_hostname());
return 2;
}
break;
case 'I':
if (placeholder[1] == 'P') {
strbuf_addstr_or_null(sb, get_ip_address());
return 2;
}
break;
case 'P':
strbuf_addstr_or_null(sb, tcp_port);
return 1;
case 'D':
strbuf_addstr(sb, context->directory);
return 1;
}
return 0;
}
static const char *path_ok(const char *directory)
{
static char rpath[PATH_MAX];
@ -144,14 +200,10 @@ static const char *path_ok(const char *directory)
}
else if (interpolated_path && saw_extended_args) {
struct strbuf expanded_path = STRBUF_INIT;
struct strbuf_expand_dict_entry dict[6];
struct expand_path_context context;
context.directory = directory;
dict[0].placeholder = "H"; dict[0].value = hostname;
dict[1].placeholder = "CH"; dict[1].value = canon_hostname;
dict[2].placeholder = "IP"; dict[2].value = ip_address;
dict[3].placeholder = "P"; dict[3].value = tcp_port;
dict[4].placeholder = "D"; dict[4].value = directory;
dict[5].placeholder = NULL; dict[5].value = NULL;
if (*dir != '/') {
/* Allow only absolute */
logerror("'%s': Non-absolute path denied (interpolated-path active)", dir);
@ -159,7 +211,7 @@ static const char *path_ok(const char *directory)
}
strbuf_expand(&expanded_path, interpolated_path,
strbuf_expand_dict_cb, &dict);
expand_path, &context);
strlcpy(interp_path, expanded_path.buf, PATH_MAX);
strbuf_release(&expanded_path);
loginfo("Interpolated dir '%s'", interp_path);
@ -254,8 +306,8 @@ static int run_access_hook(struct daemon_service *service, const char *dir, cons
*arg++ = service->name;
*arg++ = path;
*arg++ = STRARG(hostname);
*arg++ = STRARG(canon_hostname);
*arg++ = STRARG(ip_address);
*arg++ = STRARG(get_canon_hostname());
*arg++ = STRARG(get_ip_address());
*arg++ = STRARG(tcp_port);
*arg = NULL;
#undef STRARG
@ -548,6 +600,7 @@ static void parse_host_arg(char *extra_args, int buflen)
}
free(hostname);
hostname = canonicalize_client(host);
hostname_lookup_done = 0;
}
/* On to the next one */
@ -556,11 +609,14 @@ static void parse_host_arg(char *extra_args, int buflen)
if (extra_args < end && *extra_args)
die("Invalid request");
}
}
/*
/*
* Locate canonical hostname and its IP address.
*/
if (hostname) {
static void lookup_hostname(void)
{
if (!hostname_lookup_done && hostname) {
#ifndef NO_IPV6
struct addrinfo hints;
struct addrinfo *ai;
@ -609,6 +665,7 @@ static void parse_host_arg(char *extra_args, int buflen)
ip_address = xstrdup(addrbuf);
}
#endif
hostname_lookup_done = 1;
}
}