#include "cache.h"
+#include "config.h"
#include "pkt-line.h"
-#include "exec_cmd.h"
#include "run-command.h"
#include "strbuf.h"
#include "string-list.h"
-#ifndef HOST_NAME_MAX
-#define HOST_NAME_MAX 256
-#endif
-
#ifdef NO_INITGROUPS
#define initgroups(x, y) (0) /* nothing */
#endif
-static int log_syslog;
+static enum log_destination {
+ LOG_DESTINATION_UNSET = -1,
+ LOG_DESTINATION_NONE = 0,
+ LOG_DESTINATION_STDERR = 1,
+ LOG_DESTINATION_SYSLOG = 2,
+} log_destination = LOG_DESTINATION_UNSET;
static int verbose;
static int reuseaddr;
static int informative_errors;
" [--access-hook=<path>]\n"
" [--inetd | [--listen=<host_or_ipaddr>] [--port=<n>]\n"
" [--detach] [--user=<user> [--group=<group>]]\n"
+" [--log-destination=(stderr|syslog|none)]\n"
" [<directory>...]";
/* List of acceptable pathname prefixes */
-static char **ok_paths;
+static const char **ok_paths;
static int strict_paths;
/* If this is set, git-daemon-export-ok is not required */
static void logreport(int priority, const char *err, va_list params)
{
- if (log_syslog) {
+ switch (log_destination) {
+ case LOG_DESTINATION_SYSLOG: {
char buf[1024];
vsnprintf(buf, sizeof(buf), err, params);
syslog(priority, "%s", buf);
- } else {
+ break;
+ }
+ case LOG_DESTINATION_STDERR:
/*
* Since stderr is set to buffered mode, the
* logging of different processes will not overlap
vfprintf(stderr, err, params);
fputc('\n', stderr);
fflush(stderr);
+ break;
+ case LOG_DESTINATION_NONE:
+ break;
+ case LOG_DESTINATION_UNSET:
+ BUG("log destination not initialized correctly");
}
}
{
static char rpath[PATH_MAX];
static char interp_path[PATH_MAX];
+ size_t rlen;
const char *path;
const char *dir;
namlen = slash - dir;
restlen -= namlen;
loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash);
- snprintf(rpath, PATH_MAX, "%.*s/%s%.*s",
- namlen, dir, user_path, restlen, slash);
+ rlen = snprintf(rpath, sizeof(rpath), "%.*s/%s%.*s",
+ namlen, dir, user_path, restlen, slash);
+ if (rlen >= sizeof(rpath)) {
+ logerror("user-path too large: %s", rpath);
+ return NULL;
+ }
dir = rpath;
}
}
strbuf_expand(&expanded_path, interpolated_path,
expand_path, &context);
- strlcpy(interp_path, expanded_path.buf, PATH_MAX);
+
+ rlen = strlcpy(interp_path, expanded_path.buf,
+ sizeof(interp_path));
+ if (rlen >= sizeof(interp_path)) {
+ logerror("interpolated path too large: %s",
+ interp_path);
+ return NULL;
+ }
+
strbuf_release(&expanded_path);
loginfo("Interpolated dir '%s'", interp_path);
logerror("'%s': Non-absolute path denied (base-path active)", dir);
return NULL;
}
- snprintf(rpath, PATH_MAX, "%s%s", base_path, dir);
+ rlen = snprintf(rpath, sizeof(rpath), "%s%s", base_path, dir);
+ if (rlen >= sizeof(rpath)) {
+ logerror("base-path too large: %s", rpath);
+ return NULL;
+ }
dir = rpath;
}
}
if ( ok_paths && *ok_paths ) {
- char **pp;
+ const char **pp;
int pathlen = strlen(path);
/* The validation is done on the paths after enter_repo
return NULL; /* Fallthrough. Deny by default */
}
-typedef int (*daemon_service_fn)(void);
+typedef int (*daemon_service_fn)(const struct argv_array *env);
struct daemon_service {
const char *name;
const char *config_name;
{
if (!informative_errors)
msg = "access denied or repository not exported";
- packet_write(1, "ERR %s: %s", msg, dir);
+ packet_write_fmt(1, "ERR %s: %s", msg, dir);
return -1;
}
}
static int run_service(const char *dir, struct daemon_service *service,
- struct hostinfo *hi)
+ struct hostinfo *hi, const struct argv_array *env)
{
const char *path;
int enabled = service->enabled;
*/
signal(SIGTERM, SIG_IGN);
- return service->fn();
+ return service->fn(env);
}
static void copy_to_log(int fd)
return;
}
- while (strbuf_getline(&line, fp, '\n') != EOF) {
+ while (strbuf_getline_lf(&line, fp) != EOF) {
logerror("%s", line.buf);
strbuf_setlen(&line, 0);
}
fclose(fp);
}
-static int run_service_command(const char **argv)
+static int run_service_command(struct child_process *cld)
{
- struct child_process cld = CHILD_PROCESS_INIT;
-
- cld.argv = argv;
- cld.git_cmd = 1;
- cld.err = -1;
- if (start_command(&cld))
+ argv_array_push(&cld->args, ".");
+ cld->git_cmd = 1;
+ cld->err = -1;
+ if (start_command(cld))
return -1;
close(0);
close(1);
- copy_to_log(cld.err);
+ copy_to_log(cld->err);
- return finish_command(&cld);
+ return finish_command(cld);
}
-static int upload_pack(void)
+static int upload_pack(const struct argv_array *env)
{
- /* Timeout as string */
- char timeout_buf[64];
- const char *argv[] = { "upload-pack", "--strict", NULL, ".", NULL };
+ struct child_process cld = CHILD_PROCESS_INIT;
+ argv_array_pushl(&cld.args, "upload-pack", "--strict", NULL);
+ argv_array_pushf(&cld.args, "--timeout=%u", timeout);
- argv[2] = timeout_buf;
+ argv_array_pushv(&cld.env_array, env->argv);
- snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout);
- return run_service_command(argv);
+ return run_service_command(&cld);
}
-static int upload_archive(void)
+static int upload_archive(const struct argv_array *env)
{
- static const char *argv[] = { "upload-archive", ".", NULL };
- return run_service_command(argv);
+ struct child_process cld = CHILD_PROCESS_INIT;
+ argv_array_push(&cld.args, "upload-archive");
+
+ argv_array_pushv(&cld.env_array, env->argv);
+
+ return run_service_command(&cld);
}
-static int receive_pack(void)
+static int receive_pack(const struct argv_array *env)
{
- static const char *argv[] = { "receive-pack", ".", NULL };
- return run_service_command(argv);
+ struct child_process cld = CHILD_PROCESS_INIT;
+ argv_array_push(&cld.args, "receive-pack");
+
+ argv_array_pushv(&cld.env_array, env->argv);
+
+ return run_service_command(&cld);
}
static struct daemon_service daemon_service[] = {
/*
* Read the host as supplied by the client connection.
+ *
+ * Returns a pointer to the character after the NUL byte terminating the host
+ * arguemnt, or 'extra_args' if there is no host arguemnt.
*/
-static void parse_host_arg(struct hostinfo *hi, char *extra_args, int buflen)
+static char *parse_host_arg(struct hostinfo *hi, char *extra_args, int buflen)
{
char *val;
int vallen;
if (strncasecmp("host=", extra_args, 5) == 0) {
val = extra_args + 5;
vallen = strlen(val) + 1;
+ loginfo("Extended attribute \"host\": %s", val);
if (*val) {
/* Split <host>:<port> at colon. */
char *host;
if (extra_args < end && *extra_args)
die("Invalid request");
}
+
+ return extra_args;
+}
+
+static void parse_extra_args(struct hostinfo *hi, struct argv_array *env,
+ char *extra_args, int buflen)
+{
+ const char *end = extra_args + buflen;
+ struct strbuf git_protocol = STRBUF_INIT;
+
+ /* First look for the host argument */
+ extra_args = parse_host_arg(hi, extra_args, buflen);
+
+ /* Look for additional arguments places after a second NUL byte */
+ for (; extra_args < end; extra_args += strlen(extra_args) + 1) {
+ const char *arg = extra_args;
+
+ /*
+ * Parse the extra arguments, adding most to 'git_protocol'
+ * which will be used to set the 'GIT_PROTOCOL' envvar in the
+ * service that will be run.
+ *
+ * If there ends up being a particular arg in the future that
+ * git-daemon needs to parse specificly (like the 'host' arg)
+ * then it can be parsed here and not added to 'git_protocol'.
+ */
+ if (*arg) {
+ if (git_protocol.len > 0)
+ strbuf_addch(&git_protocol, ':');
+ strbuf_addstr(&git_protocol, arg);
+ }
+ }
+
+ if (git_protocol.len > 0) {
+ loginfo("Extended attribute \"protocol\": %s", git_protocol.buf);
+ argv_array_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=%s",
+ git_protocol.buf);
+ }
+ strbuf_release(&git_protocol);
}
/*
strbuf_release(&hi->tcp_port);
}
+static void set_keep_alive(int sockfd)
+{
+ int ka = 1;
+
+ if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0) {
+ if (errno != ENOTSOCK)
+ logerror("unable to set SO_KEEPALIVE on socket: %s",
+ strerror(errno));
+ }
+}
+
static int execute(void)
{
char *line = packet_buffer;
int pktlen, len, i;
char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
struct hostinfo hi;
+ struct argv_array env = ARGV_ARRAY_INIT;
hostinfo_init(&hi);
if (addr)
loginfo("Connection from %s:%s", addr, port);
+ set_keep_alive(0);
alarm(init_timeout ? init_timeout : timeout);
pktlen = packet_read(0, NULL, NULL, packet_buffer, sizeof(packet_buffer), 0);
alarm(0);
len = strlen(line);
- if (pktlen != len)
- loginfo("Extended attributes (%d bytes) exist <%.*s>",
- (int) pktlen - len,
- (int) pktlen - len, line + len + 1);
- if (len && line[len-1] == '\n') {
- line[--len] = 0;
- pktlen--;
- }
+ if (len && line[len-1] == '\n')
+ line[len-1] = 0;
+ /* parse additional args hidden behind a NUL byte */
if (len != pktlen)
- parse_host_arg(&hi, line + len + 1, pktlen - len - 1);
+ parse_extra_args(&hi, &env, line + len + 1, pktlen - len - 1);
for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
struct daemon_service *s = &(daemon_service[i]);
* Note: The directory here is probably context sensitive,
* and might depend on the actual service being performed.
*/
- int rc = run_service(arg, s, &hi);
+ int rc = run_service(arg, s, &hi, &env);
hostinfo_clear(&hi);
+ argv_array_clear(&env);
return rc;
}
}
hostinfo_clear(&hi);
+ argv_array_clear(&env);
logerror("Protocol error: '%s'", line);
return -1;
}
/* remove the child */
*cradle = blanket->next;
live_children--;
+ child_process_clear(&blanket->cld);
free(blanket);
} else
cradle = &blanket->next;
}
-static char **cld_argv;
+static struct argv_array cld_argv = ARGV_ARRAY_INIT;
static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
{
struct child_process cld = CHILD_PROCESS_INIT;
- char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
- char *env[] = { addrbuf, portbuf, NULL };
if (max_connections && live_children >= max_connections) {
kill_some_child();
}
if (addr->sa_family == AF_INET) {
+ char buf[128] = "";
struct sockaddr_in *sin_addr = (void *) addr;
- inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf + 12,
- sizeof(addrbuf) - 12);
- snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
- ntohs(sin_addr->sin_port));
+ inet_ntop(addr->sa_family, &sin_addr->sin_addr, buf, sizeof(buf));
+ argv_array_pushf(&cld.env_array, "REMOTE_ADDR=%s", buf);
+ argv_array_pushf(&cld.env_array, "REMOTE_PORT=%d",
+ ntohs(sin_addr->sin_port));
#ifndef NO_IPV6
} else if (addr->sa_family == AF_INET6) {
+ char buf[128] = "";
struct sockaddr_in6 *sin6_addr = (void *) addr;
-
- char *buf = addrbuf + 12;
- *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
- inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf,
- sizeof(addrbuf) - 13);
- strcat(buf, "]");
-
- snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
- ntohs(sin6_addr->sin6_port));
+ inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(buf));
+ argv_array_pushf(&cld.env_array, "REMOTE_ADDR=[%s]", buf);
+ argv_array_pushf(&cld.env_array, "REMOTE_PORT=%d",
+ ntohs(sin6_addr->sin6_port));
#endif
}
- cld.env = (const char **)env;
- cld.argv = (const char **)cld_argv;
+ cld.argv = cld_argv.argv;
cld.in = incoming;
cld.out = dup(incoming);
inet_ntop(family, &((struct sockaddr_in*)sin)->sin_addr, ip, len);
break;
default:
- strcpy(ip, "<unknown>");
+ xsnprintf(ip, sizeof(ip), "<unknown>");
}
return ip;
}
int gai;
long flags;
- sprintf(pbuf, "%d", listen_port);
+ xsnprintf(pbuf, sizeof(pbuf), "%d", listen_port);
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
continue;
}
+ set_keep_alive(sockfd);
+
if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
logerror("Could not bind to %s: %s",
ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
return 0;
}
+ set_keep_alive(sockfd);
+
if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
logerror("Could not bind to %s: %s",
ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
return service_loop(&socklist);
}
-int main(int argc, char **argv)
+int cmd_main(int argc, const char **argv)
{
int listen_port = 0;
struct string_list listen_addr = STRING_LIST_INIT_NODUP;
struct credentials *cred = NULL;
int i;
- git_setup_gettext();
-
- git_extract_argv0_path(argv[0]);
-
for (i = 1; i < argc; i++) {
- char *arg = argv[i];
+ const char *arg = argv[i];
const char *v;
if (skip_prefix(arg, "--listen=", &v)) {
}
if (!strcmp(arg, "--inetd")) {
inetd_mode = 1;
- log_syslog = 1;
continue;
}
if (!strcmp(arg, "--verbose")) {
continue;
}
if (!strcmp(arg, "--syslog")) {
- log_syslog = 1;
+ log_destination = LOG_DESTINATION_SYSLOG;
continue;
}
+ if (skip_prefix(arg, "--log-destination=", &v)) {
+ if (!strcmp(v, "syslog")) {
+ log_destination = LOG_DESTINATION_SYSLOG;
+ continue;
+ } else if (!strcmp(v, "stderr")) {
+ log_destination = LOG_DESTINATION_STDERR;
+ continue;
+ } else if (!strcmp(v, "none")) {
+ log_destination = LOG_DESTINATION_NONE;
+ continue;
+ } else
+ die("unknown log destination '%s'", v);
+ }
if (!strcmp(arg, "--export-all")) {
export_all_trees = 1;
continue;
}
if (!strcmp(arg, "--detach")) {
detach = 1;
- log_syslog = 1;
continue;
}
if (skip_prefix(arg, "--user=", &v)) {
usage(daemon_usage);
}
- if (log_syslog) {
+ if (log_destination == LOG_DESTINATION_UNSET) {
+ if (inetd_mode || detach)
+ log_destination = LOG_DESTINATION_SYSLOG;
+ else
+ log_destination = LOG_DESTINATION_STDERR;
+ }
+
+ if (log_destination == LOG_DESTINATION_SYSLOG) {
openlog("git-daemon", LOG_PID, LOG_DAEMON);
set_die_routine(daemon_die);
} else
die("base-path '%s' does not exist or is not a directory",
base_path);
- if (inetd_mode) {
+ if (log_destination != LOG_DESTINATION_STDERR) {
if (!freopen("/dev/null", "w", stderr))
die_errno("failed to redirect stderr to /dev/null");
}
if (detach) {
if (daemonize())
die("--detach not supported on this platform");
- } else
- sanitize_stdfds();
+ }
if (pid_file)
write_file(pid_file, "%"PRIuMAX, (uintmax_t) getpid());
/* prepare argv for serving-processes */
- cld_argv = xmalloc(sizeof (char *) * (argc + 2));
- cld_argv[0] = argv[0]; /* git-daemon */
- cld_argv[1] = "--serve";
+ argv_array_push(&cld_argv, argv[0]); /* git-daemon */
+ argv_array_push(&cld_argv, "--serve");
for (i = 1; i < argc; ++i)
- cld_argv[i+1] = argv[i];
- cld_argv[argc+1] = NULL;
+ argv_array_push(&cld_argv, argv[i]);
return serve(&listen_addr, listen_port, cred);
}